Motor chain saw or cutting machine

Abstract

The invention relates to a motor chain saw or cutting machine with a tool having a tool plane and an operating handle, the longitudinal direction extending in the direction from the operating handle to the tool. The working instrument comprises: a housing having a housing opening for drawing cooling air into the housing; an electric motor arranged in the housing and for driving a tool; and an air filter disposed at or in the housing opening. The motor chain saw or cutter may be placed on a horizontal plane in a placement position. The shell is provided with a bottom facing the horizontal plane in the placing position; a housing cover disposed opposite the bottom; and side surfaces. In a side view perpendicular to the tool plane, the housing has a housing outer contour which delimits an imaginary housing surface in an imaginary projection to the tool plane in a direction perpendicular to the tool plane. In an imaginary projection of the air filter to the tool plane in a direction perpendicular to the tool plane, the air filter has a filter outer contour which delimits an imaginary filter surface. The filter face is at least 5% of the housing face.

Description

Technical Field

[0001] The invention relates to a motor chain saw or a cutting machine (Trennschleifer) with a tool, the tool having a tool plane and an operating handle, wherein the longitudinal direction extends in the direction of the operating handle to the tool. The working tool comprises: a housing, the housing having a housing opening for sucking cooling air into the housing; an electric motor for driving the tool, which is arranged in the housing; and an air filter, which is arranged at or in the housing opening. The motor chain saw or the cutting machine can be placed on a horizontal surface in a storage position, wherein the housing has a bottom facing the horizontal surface in the storage position; wherein the housing has a housing cover arranged opposite the bottom; wherein the housing has a side surface, which connects the housing cover and the bottom to each other and limits the working tool in the longitudinal direction in a direction perpendicular to the tool plane. Background Art

[0002] In the following, the terms motor chain saw and cutter are combined under the term work implement. That is, work implement is therefore used to refer to a motor chain saw or a cutter.

[0003] In such work machines, cooling air is guided into the housing in order to cool the electric motor. In order to protect the electric motor from dirt, an air filter is provided. After a certain period of use, the air filter should be cleaned or replaced. Depending on the conditions of use, this period of use can be shorter or longer. The filter should then be cleaned or replaced at corresponding intervals. Summary of the invention

[0004] The object of the present invention is to improve a motor chain saw of the generic type or a cutting machine of the generic type in such a way that the air filter only has to be cleaned or replaced after the longest possible usage time of the work tool.

[0005] This object is achieved by a motor chain saw or a cutting machine with a tool, the tool having a tool plane and an operating handle, wherein the longitudinal direction extends in the direction of the operating handle to the tool. The motor chain saw or the cutting machine comprises: a housing having a housing opening for sucking cooling air into the housing; an electric motor, which is arranged in the housing and is used to drive the tool; and an air filter, which is arranged at or in the housing opening, wherein the working tool can be placed on a horizontal surface in the storage position, wherein the housing has a bottom facing the horizontal surface in the storage position; wherein the housing has a housing cover opposite the bottom; wherein the housing has a side surface, which connects the housing cover and the bottom to each other and exposes the motor in the longitudinal direction in a direction perpendicular to the tool plane. The invention relates to a chain saw or a cutting machine for limiting the use of the air filter. The air filter is arranged on the side of the housing, wherein the housing has a housing outer contour in a side view perpendicular to the tool plane, and the housing outer contour limits an imaginary housing surface in an imaginary projection onto the tool plane in a direction perpendicular to the tool plane, wherein the air filter has a filter outer contour in an imaginary projection onto the tool plane in a direction perpendicular to the tool plane, and the filter outer contour limits an imaginary filter surface, and wherein the filter surface is at least 5%, in particular at least 10%, in particular at least 15%, in particular at least 18% of the housing surface.

[0006] In the solution according to the invention, it is provided that the air filter is arranged at the side of the housing. There is thus enough space for arranging the air filter. The air filter can be designed to be larger. The air filter can have a larger filter surface. The same amount of air can thus be filtered over a larger surface. Therefore, the dirt input per unit area is lower for the air filter. The air filter thus has to be replaced only after a long period of use. Due to the lateral arrangement of the air filter on the side of the housing, the air filter can be approached in a comfortable manner.

[0007] The housing has a housing outer contour in a side view perpendicular to the tool plane. The housing outer contour delimits an imaginary housing surface in an imaginary projection onto the tool horizontal plane. The projection occurs in a direction perpendicular to the tool plane. The air filter has a filter outer contour in an imaginary projection onto the tool plane. The projection occurs in a direction perpendicular to the tool plane. The filter outer contour delimits an imaginary filter surface in the tool plane. The filter surface is at least 5%, in particular at least 10%, in particular at least 11%, in particular at least 15%, in particular at least 18% of the housing surface.

[0008] Since the filter surface is at least 5%, in particular at least 10%, in particular at least 11%, in particular at least 15%, in particular at least 18% of the housing surface, the filter surface is particularly large. Thus, on the one hand, the sucked dirt can be distributed on a large surface, and on the other hand, the suction force is distributed on a larger surface. The distribution of dirt on a larger surface increases the service life of the filter. If the same amount of dirt can be distributed on a larger surface, the thickness of the dirt layer produced here is lower. Thus, the air filter can be replaced at larger intervals. Because the suction force can be distributed on a larger filter surface, the suction vacuum is low, and therefore the suction speed and flow speed of the sucked cooling air are also low. This leads to reduced dirt carryover. The number of particles carried by the cooling air is proportional to the square of the cooling air flow speed. If the flow speed decreases, the number of dirt particles carried is also reduced. Due to the lower pollution, the air filter must only be replaced after a long period of use.

[0009] In a preferred development of the invention, it is provided that the housing opening is arranged at the side of the housing. The housing opening has an opening outer contour in an imaginary projection onto the tool plane in a direction perpendicular to the tool plane. The opening outer contour delimits an imaginary opening surface in the tool plane. In particular, the opening surface is at least 5%, in particular at least 10%, in particular at least 11% of the housing surface. This allows the use of air filters with a large filter surface. This increases the service life and reduces dirt carryover.

[0010] The filter surface is in particular at least 60 square centimeters, in particular at least 70 square centimeters, in particular at least 80 square centimeters, in particular at least 85 square centimeters, in particular at least 100 square centimeters, in particular at least 125 square centimeters. Since the filter surface is so large, air is sucked into the working device over a larger surface. Thus, the dirt sucked together with the cooling air can be distributed over a larger surface. In particular, the particles sucked together with the cooling air can be distributed over a larger surface. Therefore, the filter will not be exhausted too quickly. The large filter surface of the air filter increases the service life of the filter.

[0011] In an alternative solution presenting an independent inventive concept, it is provided that in a motor chain saw or a cutting machine having a tool with a tool plane and an operating handle, the longitudinal direction extends in the direction of the operating handle to the tool. The motor chain saw or the cutting machine comprises an inlet opening for letting cooling air into the motor chain saw or the cutting machine, a housing and an electric motor for driving the tool, which is arranged in the housing. The motor chain saw or the cutting machine comprises an air filter for filtering the cooling air. The air filter is arranged only on a first side of the tool plane. The inlet opening is arranged so that cooling air can flow through the inlet opening in the longitudinal direction.

[0012] The housing has a housing outer contour in a side view perpendicular to the first side of the tool plane. The housing outer contour delimits an imaginary housing surface in an imaginary projection in the tool plane into the tool plane. The projection takes place in a direction perpendicular to the tool plane. According to the invention, the work tool has no openings for letting cooling air into the work tool within the housing outer contour in a side view perpendicular to the first side of the tool plane on at least 95%, in particular on at least 97%, in particular on at least 98.5% of the imaginary housing surface.

[0013] The opening in the side view on the first side perpendicular to the tool plane only represents the part of the through-opening for letting cooling air into the work tool that is visible in the side view on the first side perpendicular to the tool plane. The through-opening can actually be larger than the opening, but then be covered by components of the work tool in the side view on the first side perpendicular to the tool plane.

[0014] If the opening, in particular only the part of the through-opening for allowing cooling air to enter the working tool that is visible in the side view of the first side perpendicular to the tool plane, is projected onto the tool plane in a direction perpendicular to the tool plane, then the area portion of the surface without the projection of the opening in the shell surface is at least 95%, in particular at least 97%, in particular at least 98.5% of the imaginary shell surface.

[0015] Since the work machine, in a side view perpendicular to the first side of the tool plane, has largely no opening for the cooling air to enter the work machine, the air filter is well protected against penetrating dirt. In particular, in applications of the work machine in which the inlet opening is directed upwards with respect to the vertical, only very little dirt can enter through the inlet opening, which falls onto the work machine, for example, due to gravity. This is the case with motor chain saws, in particular, in tree felling. In this case, when cutting with the motor chain saw, sawdust rises in a spiral and sinks downward or other dirt cannot enter the work machine through the inlet opening for the cooling air and reach the air filter.

[0016] Since cooling air can flow into the working device from the outside through the inlet opening in the longitudinal direction, i.e. in the direction from the rear end to the front end of the working device, the inlet opening is well protected from dirt generated by the tool when using the handheld working device or in any other way. In particular, the inlet opening is thus directed away from the tool. The inlet opening is arranged in front of the tool, in particular, with respect to the longitudinal direction, and in particular the distance from the operating handle is smaller than the distance from the tool. The inlet opening is particularly facing away from the tool. Thus, only a small amount of dirt also enters the working device through the inlet opening for cooling air. Only a small amount of dirt is transmitted to the air filter. As a result, the air filter must only be replaced after a long period of use.

[0017] In the solution variant according to the invention, the features of the alternative solution variant do not have to be provided. All optional features can improve the solution variant according to the invention and / or the alternative solution variant.

[0018] It is advantageously arranged that the motor chain saw or the cutting machine can be placed on a horizontal surface in the storage position, the housing has a bottom facing the horizontal surface in the storage position, the housing has a housing cover opposite the bottom, and the housing has side surfaces which connect the housing cover and the bottom to each other and limit the working device in a longitudinal direction perpendicular to the tool plane.

[0019] In particular, the air filter is arranged at the side of the housing. The air filter has a filter outer contour in an imaginary projection onto the tool plane in a direction perpendicular to the tool plane, which defines an imaginary filter surface in the tool plane. In particular, the filter surface is at least 5%, in particular at least 10%, in particular at least 11%, in particular at least 15%, in particular at least 18% of the housing surface, and / or the filter surface is in particular at least 60 square centimeters, in particular at least 70 square centimeters, in particular at least 80 square centimeters, in particular at least 85 square centimeters, in particular at least 100 square centimeters, in particular at least 125 square centimeters.

[0020] In a special development of the invention, the inlet opening is visible in the longitudinal direction in a view toward the work tool. In particular, the inlet opening is completely uncovered in the longitudinal direction in a view toward the work tool. As a result, the work tool can draw cooling air particularly well through the inlet opening. The cooling air can flow well and reliably into the area in front of the inlet opening.

[0021] In particular, the features listed below in the introduction to the description are developments of the solution according to the invention and of alternative solutions according to the invention.

[0022] The upward direction extends in a direction transverse to the longitudinal direction, in particular in a direction perpendicular to the longitudinal direction. The upward direction extends parallel to the tool plane.

[0023] In a suitable improvement of the present invention, the air filter is arranged to be inclined in an upward direction toward a first side of a motor chain saw or a cutting machine, so that dirt can be separated and fall from the air filter due to gravity. In particular, the air filter is inclined relative to the upward direction at an angle of at least 5°.

[0024] In a special improvement of the present invention, the working machine has a lower inlet opening for cooling air to enter the working machine. The lower inlet opening is arranged so that cooling air can flow through the lower inlet opening in the upward direction. Since the lower inlet opening for cooling air to enter the working machine has an additional inlet opening for cooling air, a larger suction surface is available overall. The large suction surface ensures a small flow velocity and thus also ensures a small dirt carryover. The amount of dirt carried away by the cooling air decreases with the square of the flow velocity. The number of particles of the same size and characteristics that are sufficiently small and carried is proportional to the square of the cooling air velocity. Due to the provision of the lower inlet opening, the dirt sucked through one of the openings for cooling air can fall from the working machine again through the lower inlet opening under the effect of gravity. In particular, the working machine is designed so that dirt can be separated from the air filter due to gravity, especially in the storage position of the working machine, and can fall out of the working machine through the lower inlet opening. Thus, the air filter is not unnecessarily exhausted.

[0025] The inlet opening has a flow cross section, which is arranged so that cooling air can flow through the inlet opening in the longitudinal direction. The lower inlet opening has a lower flow cross section. In particular, the flow cross section of the lower inlet opening is 100% to 120% of the flow cross section of the inlet opening.

[0026] The work tool preferably has a filter cover for holding the air filter. However, it can also be provided that the work tool is constructed without the filter cover. In particular, the filter cover at least partially covers the air filter, in particular completely covers the air filter in a side view in a direction perpendicular to the first side of the tool plane. The air filter can be held between the filter cover and the housing, in particular clamped between the filter cover and the housing.

[0027] In particular, the air filter is held with a gap between the filter cover and the base body of the motor chain saw or the cutting machine. This makes it easier to manufacture the work tool. The filter cover can be pressed against the base body and abuts against it without the air filter having to be taken into account in the manufacturing tolerances for this purpose. Since the filter cover can be pressed against the base body, low requirements can be made on the manufacturing tolerances of the relative position of the base body and the filter cover, and the filter cover still abuts against the base body reliably and tightly.

[0028] In a suitable improvement of the present invention, the inlet opening of the work tool is configured in the filter cover. Suitably, the lower inlet opening is configured in the filter cover. Thus, the inlet opening or the lower inlet opening can be manufactured in a simple manner.

[0029] Suitably, the filter cover and / or the air filter, in particular the external air filter, can be fixed to the housing by a single fixing element. Therefore, the filter cover can be sealed with the housing, in particular airtightly abutting against the housing. In particular, the single fixing element is a central fixing element. In particular, the fixing element can be fixed roughly in the middle of the filter cover in a side view perpendicular to the tool plane, in particular in the area centroid of the surface assigned to the outer contour of the filter. Since the filter cover can be fixed by a single fixing element, the filter cover can be installed and removed in a simple and comfortable manner. The air filter can be quickly replaced and can be approached in a simple manner.

[0030] In particular, the housing has a housing opening for sucking cooling air into the housing. In particular, the air filter covers the housing opening. Suitably, the air filter is arranged in the housing opening. However, it can also be arranged that the air filter is arranged on the housing opening or at the housing opening. The filter cover has a cover outer contour in a side view perpendicular to the tool plane. The cover outer contour delimits an imaginary cover surface in an imaginary projection toward the tool plane in the tool plane. The imaginary projection is performed in a direction perpendicular to the tool plane. When the filter cover is projected toward the tool plane in a direction perpendicular to the tool plane, the projection has an outer contour corresponding to the cover outer contour. The cover outer contour delimits an imaginary cover surface in the tool plane. In particular, the filter cover has no opening for allowing cooling air to enter the work tool on at least 85%, in particular at least 90%, in particular at least 95% of the cover surface in a side view perpendicular to the tool plane, in particular within the cover outer contour.

[0031] Suitably, the filter cover has a pressing rib for pressing the air filter against the housing. The pressing rib is particularly arranged in the region of the inlet opening and / or the lower inlet opening. The pressing rib is particularly adjacent to the inlet opening and / or the lower inlet opening. The pressing rib is suitably deeper in the cooling air flow direction than its width in the transverse flow direction of the cooling air. Due to the pressing rib, the filter cover is fully supported on the housing. Since the pressing rib is aligned in the flow direction of the cooling air, the pressing rib represents a low flow resistance for the cooling air. The pressing rib only prevents the cooling air from entering the working device, in particular the housing, to at least the extent required to press the air filter against the housing via the pressing rib.

[0032] In a special improvement of the present invention, the housing has a receiving compartment for a battery pack. The battery pack can be pushed into the receiving compartment through the receiving opening of the receiving compartment along the insertion direction. Suitably, there is no receiving opening of the receiving compartment for the battery on the side. As a result, the filter surface can be designed to be particularly large. No space needs to be provided on the side for the receiving opening of the receiving compartment. As a result, the opening surface of the housing opening, in particular the housing opening, in particular the opening surface of the housing opening of the air filter can be designed to be particularly large. In particular, the insertion direction extends parallel to the tool plane.

[0033] It is expediently provided that an imaginary projection of the air filter in a direction perpendicular to the tool plane onto the tool plane and an imaginary projection of the receiving compartment in a direction perpendicular to the tool plane onto the tool plane overlap in the tool plane.

[0034] Suitably, the air filter is a fine filter. In particular, the air filter is a flat filter. In particular, the air filter is a fine dust filter.

[0035] In particular, the air filter comprises a filter frame and an air filter element. The air filter element is particularly held in the filter frame. The air filter element is a unit which itself causes air filtration. The air filter can also consist only of the air filter element. It can also be provided that the air filter does not comprise a filter frame. The air filter is also referred to as an air filter component.

[0036] The air filter has an actual surface. In particular, the actual surface is a curved surface, in particular a curved surface in the mathematical sense. The actual surface corresponds to the integrated area of ​​one side of the surface of the air filter, in particular the surface of the air filter element of the air filter. Preferably, the actual surface is larger than the filter surface projected onto the tool plane. This may be the case in both solutions. In particular, the actual surface is at least 140%, in particular at least 160%, in particular at least 200% of the filter surface projected onto the tool plane. Therefore, the filtering effect can be good in a small space, in particular when the filter surface projected onto the tool plane is small. In particular, the air filter, in particular the air filter element, has a folded portion. In particular, the air filter, in particular the air filter element is a pleated portion.

[0037] In particular, the actual surface area of ​​the air filter is at least 150 cm 2 , in particular 225 cm 2 , in particular at least 275 cm 2 .

[0038] In particular, the actual surface of the air filter is at least 8%, in particular at least 10%, in particular at least 15%, in particular at least 25%, in particular at least 30%, in particular at least 35%, in particular at least 38% of the housing surface projected onto the tool plane.

[0039] In particular, the air filter forms part of the outer side of the working device. Advantageously, the housing opening is designed as a recess in the first side of the housing, so that a cavity is formed between the outer side of the first side and the air filter. In particular, the wall penetration opening is formed in the housing opening. Suitably, the wall penetration opening completely penetrates the wall of the housing. In particular, the wall penetration opening completely penetrates the wall of the housing in the area of ​​the wall covered by the air filter. By configuring the cavity with the wall penetration opening, the motor chain saw or the cutting machine can be designed in such a way that a good filtering effect due to the large filter surface and a good cooling effect due to the high flow velocity of the cooling air are simultaneously achieved.

[0040] The wall penetration opening has a penetration surface. Advantageously, the penetration surface is smaller than the filter surface. This increases the flow speed of the cooling air on the path from the air filter to the penetration opening.

[0041] In particular, the cavity is funnel-shaped. In particular, the air filter forms an inlet opening for cooling air to enter the cavity. In particular, the through-opening forms an outlet opening for cooling air to exit the cavity. In particular, the through-opening forms an inlet opening for cooling air to enter the interior of the housing. This enables a space-saving design of the motor chain saw or the cutting machine. In order to reduce the flow cross section for the cooling air, the first side of the housing and the housing opening configured as a recess therein can be used. No other components are required for this purpose.

[0042] In particular, the penetration surface is a maximum of 30% of the filter surface, in particular a maximum of 20% of the filter surface. In particular, the penetration surface is a maximum of 800 square millimeters, in particular a maximum of 600 square millimeters, in particular at least 400 square millimeters.

[0043] In particular, both solutions to the object - the solution according to the invention and the alternative solution - can be combined with one another. Combinations of the individual features described here are also possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Further advantages and features of the method will be explained below with the aid of an embodiment described in accordance with the accompanying drawings.

[0045] Figure 1 A perspective view showing a hand-held work tool without a tool, wherein the filter cover is shown in an exploded view facing away from the housing,

[0046] Figure 2 show Figure 1 A side view of a work machine with a tool, wherein the viewing direction is perpendicular to the tool plane of the tool,

[0047] Figure 3 show Figure 1A side view of the rear end of the working tool along its longitudinal direction,

[0048] Figure 4 Shown from above Figure 1 A top view of the working equipment.

[0049] Figure 5 Display pair Figure 1 A side view of the outside of the filter cover of the working machine in FIG.

[0050] Figure 6 Display pair Figure 1 Side view of the inside of the filter cover of the working machine in

[0051] Figure 7 Display pair Figure 5 1 , a side view of the back side of the filter cover, wherein the filter cover is mounted on a hand tool with its back facing the tool of the work tool,

[0052] Figure 8 Display from below Figure 5 , when the work tool is placed on its placement surface on a horizontal plane, the bottom of the work tool points to the horizontal plane in the installed state of the filter cover,

[0053] Fig. 9 show Figure 1 Schematic side view of an alternative embodiment of a work tool in , wherein the air filter is open at a first side and is not covered by a filter cover, wherein the work tool has a tool and is shown in a viewing direction of a first side perpendicular to a tool plane of the tool, on which the air filter is also arranged,

[0054] Fig.10 In a viewing direction perpendicular to a first side of a tool plane of a tool not shown, the Fig. 9 Schematic side view of a work tool with a disassembled air filter, which should also be arranged on the tool plane,

[0055] Fig.11 Show from below Fig.10 Schematic perspective view of a work implement in FIG. 1 , wherein the air filter is removed, wherein a through-opening into the housing interior of the housing can be seen,

[0056] Fig.12 Display from below Fig.10 Detail of a perspective view of a work implement in which the air filter is removed and in which a penetration opening into the housing interior of the housing can be seen. DETAILED DESCRIPTION

[0057] Figure 1 A hand-held working tool 1 is shown. The hand-held working tool 1 comprises Figure 2 The tool shown in 6. Figure 1 The tool 6 is not shown. The handheld working tool 1 is a motor chain saw or a cutter. In the present embodiment, the handheld working tool 1 is a motor chain saw. In the present embodiment, the motor chain saw is a so-called rear handle chain saw or a tree felling saw. However, it can also be a so-called top handle chain saw or a tree care saw. The handheld working tool 1 is portable in the intended use. The handheld working tool 1 is handheld in the intended use.

[0058] like Figure 2 Schematically shown in FIG, the handheld working tool 1 comprises a motor 7 for driving a tool 6. In the present embodiment, the motor 7 is an electric motor. The tool 6 is a saw chain. However, it can also be provided that the tool 6 is a saw blade or a cutting disc. In this embodiment, the tool 6 runs around the guide rail 33 during operation.

[0059] The working tool 1 comprises an operating handle 34. An operating element 35 is arranged on the operating handle 34. By means of the operating element 35, the operator can preset the power of the motor 7 or the rotation speed of the motor 7 or the tool 6. The operating handle 34 delimits a handle opening 32. Through the handle opening 32, the user can reach over with the fingers of his hand and thereby surround the operating handle 34. The handle opening 32 completely penetrates the working tool 1, in particular the housing 5. In addition to the operating handle 34, the working tool 1 also comprises a handle grip 27. The handle grip 27 is used to carry and guide the working tool 1. The handle grip 27 is arranged between the operating handle 34 and the tool 6. The longitudinal direction 50 extends in the direction from the operating handle 34 toward the tool 50. This also applies to the case of a tree care saw. When the working tool 1 is placed on a horizontal plane, the longitudinal direction 50 extends parallel to the horizontal plane. In this embodiment, the longitudinal direction 50 corresponds to the longitudinal direction of the guide rail 33. In all embodiments, the working tool 1 comprises a bottom 17. The motor chain saw can be placed on a horizontal plane with the bottom 17. In this embodiment, a placement surface is formed by the bottom 17. The longitudinal direction 50 extends parallel to the base 17 . The handle grip 27 is arranged between the operating handle 34 and the tool 6 with respect to the longitudinal direction 50 .

[0060] The working device 1 has a front end 2 and a rear end 3. During operation of the working device 1, the front end 2 faces away from the user. The rear end 3 faces the user during operation. In the present embodiment, the front end 2 is located at the front end of the guide rail 33. The tool surrounding the guide rail 33 forms the front end 2 of the working device 1. The rear end 3 is arranged at the rear end of the operating handle 34. The operating handle 34 forms the rear end 3 of the working device 1. The longitudinal direction 50 extends in the direction from the rear end 3 to the front end 2. When the working device 1 is used, the longitudinal direction 50 points away from the operator. The handle grip 27 is arranged between the front end 2 and the rear end 3 relative to the longitudinal direction 50.

[0061] like Figure 2 As shown in FIG. 1 , the work tool 1 comprises an inlet opening 4. The inlet opening 4 is used to allow cooling air to enter the work tool 1. The cooling air is provided for cooling the motor 7 which is configured as an electric motor, in particular for cooling the electronic components of the electric motor. The work tool 1 comprises an air filter 12 for filtering the cooling air. The air filter 12 is Figure 1 . In these embodiments, the air filter 12 comprises a filter frame and an air filter element. The air filter element is particularly held in the filter frame. The air filter element is a unit that itself causes air filtration. In the present embodiment, the air filter element of the air filter 12 is a fine filter. The fine filter has a mesh size of less than 100 microns. In the present embodiment, the air filter element of the air filter 12 is a flat filter. The air filter element of the air filter 12 can also be any other type of air filter element. The air filter 12 can also be composed only of the air filter element. It can also be arranged that the air filter does not include a filter frame. The air filter 12 is also referred to as an air filter component.

[0062] In the present embodiment, the air filter 12 is a fine filter. In the present embodiment, the air filter 12 is a flat filter. The air filter 12 can also be any other type of air filter. The working tool 1 comprises a housing 5. The motor 7 is located in the housing 5. The housing 5 at least partially delimits the working tool 1 towards the outside.

[0063] like Figure 2As shown in , the tool 6 has a tool plane E. The tool plane E extends parallel to the longitudinal direction 50. The longitudinal direction 50 extends parallel to the tool plane E. In this embodiment, the tool plane E extends perpendicularly to the bottom 17 of the working tool 1. The handle opening 32 completely penetrates the working tool 1, in particular the housing 5, in a direction perpendicular to the tool plane E. When the working tool 1 is placed on a horizontal surface, the tool plane E extends perpendicularly to the horizontal surface. The tool 6 is wrapped around in the tool plane E. In this embodiment, the saw chain runs around the guide rail 33 in the tool plane E. If the working tool is configured as a cutting machine, the circular saw blade rotates in the tool plane. The rotation axis of the tool 6 extends perpendicularly to the tool plane E.

[0064] like Figure 2 As shown, the inlet opening 4 is arranged such that cooling air can flow through the inlet opening 4 in the longitudinal direction 50. Thus, cooling air can enter the work tool 1 through the inlet opening 4 in the direction from the rear end 3 of the work tool 1 to the front end 2 of the handheld work tool 1. Figure 3 It can also be seen that cooling air can flow through the inlet opening 4 in the longitudinal direction 50. In the side view toward the rear end 3, the inlet opening 4 for cooling air from the outside into the interior of the hand-held power tool 1 can be seen.

[0065] The tool plane E has Figure 3 The tool plane E has a second side 47. The tool plane E separates the first side 46 from the second side 47. The air filter 12 is arranged completely on the first side 46 of the tool plane E.

[0066] like Figure 2 As shown in , the housing 5 has a housing outer contour 8 in a side view perpendicular to the tool plane E, in particular in a side view perpendicular to the first side 46 of the tool plane E. When the housing outer contour 8 is projected onto the tool plane E in a direction perpendicular to the tool plane E, in the tool plane E, the housing outer contour 8 delimits an imaginary housing surface 9. The housing outer contour 8 surrounds all openings of the work tool 1 that are located within the housing outer contour 8. In particular, the housing outer contour 8 surrounds the handle opening 32. The housing surface 9 has no area surrounded by the housing surface 9, which is not included in the housing surface 9. The housing surface 9 has no internal contour. The housing surface 9 is limited by a single, closed boundary line surrounding the housing surface 9, namely the housing outer contour 8.

[0067] The work tool 1 comprises a brake lever 45. The brake lever 45 is pivotably supported on the housing 5. The brake lever 45 is used to brake the tool 6. The brake lever 46 is partially located outside the housing outer contour 8. The brake lever 46 protrudes beyond the housing outer contour 8.

[0068] Working equipment 1 included in Figure 2The claw-shaped stop 44 shown in FIG. The claw-shaped stop 44 is fixed to the housing 5. When the tool 6 engages in the workpiece, the claw-shaped stop 44 serves as a stop for the work tool 1. The claw-shaped stop 44 is at least partially located outside the housing outer contour 8. The claw-shaped stop 44 protrudes beyond the housing outer contour 8.

[0069] In the side view perpendicular to the first side 46 of the tool plane E, the work tool 1 has no openings for the inlet of cooling air into the work tool 1 within the housing outer contour 8 over at least 95%, in particular at least 97%, in particular at least 98.5% of the housing surface 9. The side view perpendicular to the first side 46 of the tool plane E is a side view of the work tool 1 in which a person looks in a direction perpendicular to the tool plane E, more precisely from the first side 46 of the tool plane E. The person is therefore located on the first side 46 of the tool plane E and looks in the direction of the tool plane E.

[0070] The projection of all openings for the inlet of cooling air visible in the side view of the first side 46 perpendicular to the tool plane E in the direction perpendicular to the tool plane E on the housing surface 9 covers a surface area portion of the housing surface 9 of less than 5%, in particular less than 3%, in particular less than 1.5%. The area of ​​the housing surface 9 without openings for the inlet of cooling air into the work tool 1 is at least 95%, in particular at least 97%, in the present exemplary embodiment at least 98.5% of the housing surface 9.

[0071] The term opening denotes a portion of a through-opening for letting in cooling air into the work tool 1 which is visible in a side view in the direction of the first side 46 perpendicular to the tool plane E. The through-opening can be larger than the opening. In a side view in the direction of the first side 46 perpendicular to the tool plane E, a through-opening of a component of the work tool 1 can be covered.

[0072] The inlet opening 4 is a through opening for letting cooling air into the working machine 1. The inlet opening 4 is arranged at the outside of the working machine 1. The inlet opening 4 is a first entrance door for letting cooling air into the working machine 1 from the outside. The inlet opening 4 is an opening for letting cooling air into the working machine 1 in the above sense. In the present embodiment, the projection surface of the opening of the inlet opening 4 is the same as the projection surface of the through opening of the inlet opening 4. However, it may also happen that the projection surface of the through opening is larger than the projection surface of the opening.

[0073] Instead of being in the tool plane E, the housing outer contour 8 can also delimit the housing surface 9 in an imaginary plane running parallel to the tool plane E.

[0074] like Figure 2, the work tool 1 has an outer wall 10. In this embodiment, the inlet opening 4 completely penetrates the outer wall 10. The penetration opening completely penetrates the outer wall 10. The opening completely penetrates the outer wall 10. The outer wall 10 represents the direct boundary of the work tool 1 with respect to the external area. The outer wall 10 at least partially forms the wall of the housing 5. It can also be provided that the outer wall 10 is mostly closed and the cooling air enters the interior of the housing through smaller openings or can be sucked into the interior of the housing.

[0075] Especially Figure 2 and Figures 5 to 8 As shown in , the working tool 1 has a lower inlet opening 11. The lower inlet opening 11 is provided for allowing cooling air to enter the working tool 1. In addition to the inlet opening 4, the lower inlet opening 11 is also provided. The lower inlet opening 11 is arranged so that cooling air can flow through the lower inlet opening 11 in an upward direction 49. The upward direction 49 extends in a direction transverse to the longitudinal direction 50. The upward direction 49 extends in a direction parallel to the tool plane E. In this embodiment, the upward direction 49 extends in a direction perpendicular to the longitudinal direction 50. When the working tool 1 is placed on a horizontal plane in a placement position provided for this purpose, the upward direction 49 extends perpendicular to the horizontal plane in this embodiment. In this embodiment, the upward direction 49 extends perpendicular to the bottom 17. In this embodiment, the lower inlet opening 11 is constructed separately from the inlet opening 4. However, it can also be provided that a single inlet opening is provided, through which cooling air can enter the working tool 1 along the longitudinal direction 50 and cooling air can enter the working tool 1 along the upward direction 49. In this case, the single inlet opening is divided only conceptually into the inlet opening 4 and the lower inlet opening 11 .

[0076] In this embodiment, the work tool 1 includes a filter cover 13. The filter cover 13 is configured separately from the base body 37 of the work tool 1. The filter cover 13 is fixed to the base body 37. The housing 5 is a housing of the base body 37. The air filter 12 is arranged between the base body 37 and the filter cover 13 in this embodiment. The air filter 12 is arranged between the housing 5 and the filter cover 13 in this embodiment.

[0077] In this embodiment, the inlet opening 4 is configured in the filter cover 13. However, it can also be configured that the inlet opening 4 is configured in the housing 5 of the work tool 1. In this embodiment, the lower inlet opening 11 is configured in the filter cover 13. However, it can also be configured that the lower inlet opening 11 is configured in the housing 5 of the handheld work tool 1.

[0078] The filter cover 13 is used to hold the air filter 12. For example, Figure 1As shown in FIG. 1 , the filter cover 13 can be fixed to the housing 5 of the work tool 1 by a single fixing element 14. The filter cover 13 can be fixed to the housing 5 in particular by a single central fixing element 14. Figure 2 As shown in the figure, the fixing element 14 can be arranged approximately in the middle of the filter cover 13 in a side view toward the work tool 1 in a direction perpendicular to the tool plane E. The fixing element 14 is arranged approximately in the area of ​​the filter cover 13 in the side view. It can also be provided that the fixing element 14 is arranged exactly in the area centroid of the filter cover 13. In this embodiment, the fixing element 14 is a screw. The fixing element 14 can be screwed into the base 37 through the filter cover 13. The thread direction extends in a direction transverse to the tool plane E, especially perpendicular to the tool plane E.

[0079] The air filter 12 is arranged between the filter cover 13 and the housing 5. The air filter 12 is clamped between the filter cover 13 and the housing 5. The air filter 12 is held with a gap between the filter cover 13 and the base 37 of the work tool 1. The fixing element 14 fixes the filter cover 13 to the base 37 in such a way that a holding space is formed between the filter cover 13 and the base 37. The air filter 12 is held in the holding space. The air filter 12 has the gap in a direction transverse to the longitudinal direction 50. The air filter 12 has the gap in a direction transverse to the tool plane E, in particular perpendicular to the tool plane E.

[0080] A space is constructed between the filter cover 13 and the housing 5, which space already belongs to the interior space of the work tool 1. Cooling air can enter the work tool 1 through the inlet opening 4 and / or the lower inlet opening 11, in particular into the space between the filter cover 13 and the housing 5. The filter cover 13 delimits the work tool 1 outwardly. The filter cover 13 is used to cover the air filter 12. The filter cover 13 has a cover that forms the outer side of the work tool 1. The cover delimits the filter cover 13 in a direction transverse to the tool plane E, in particular in a direction perpendicular to the tool plane E. The cover does not have an opening for allowing cooling air to enter the work tool 1. The filter cover 13 has a side wall. The side wall and the cover delimit the space between the filter cover 13 and the housing. The inlet opening 4 is arranged in the side wall. The lower inlet opening 11 is arranged in the side wall. The cover of the filter cover 13 is supported on the housing 5 via the side wall.

[0081] like Figure 7 As shown in FIG. 1 , the inlet opening 4 has a flow cross section A. The flow cross section A is composed of a plurality of partial surfaces. The bridge 36 of the filter cover 13 is arranged between the plurality of partial surfaces.

[0082] like Figure 8, the lower inlet opening 11 is arranged at the side of the work tool 1 or the filter cover 13 which is at the bottom relative to the upward direction 49, opposite to the inlet opening 4. The inlet opening 4 is arranged on the side of the work tool 1 or the filter cover 13 which is directed backwards relative to the longitudinal direction 50. The lower side of the filter cover 13 delimits the filter cover in a direction opposite to the upward direction 49. The rear side of the filter cover 13 delimits the filter cover 13 in a direction opposite to the longitudinal direction 50. The inlet opening 4 is arranged in the rear side of the filter cover 13. The lower inlet opening 11 is arranged in the lower side of the filter cover 13.

[0083] like Figure 8 As shown, the lower inlet opening 11 has a lower flow cross section AU. In the present embodiment, the lower flow cross section AU is constructed continuously. However, it can also be arranged that the lower flow cross section surface AU is composed of a plurality of sub-flow cross sections. In this embodiment, the lower flow cross section AU is 100% to 120% of the flow cross section surface A. The flow cross sections A and AU are measured transversely to the opening surfaces of the inlet opening 4 and the lower inlet opening 11.

[0084] like Figure 1 As shown in , the housing 5 has a housing opening 15. The housing opening 15 completely penetrates the outer wall 10 of the housing 5. The housing opening 15 is used to draw cooling air into the housing 5. The air filter 12 is arranged in the housing opening 15. In this embodiment, the air filter 12 is arranged on the housing opening 15. The filter cover 13 at least partially covers the housing opening 15. It can also be arranged that, instead of the housing opening 15 that completely penetrates the outer wall 10, a recess is arranged in the housing 5, especially in the outer wall 10. The edge of the recess, especially the surrounding edge, then forms the place where the air filter 12 is attached. Then a smaller housing opening is arranged in the recess, and the cooling air enters the interior of the housing 5 through the housing opening.

[0085] The filter cover 13 has a cover outer contour 18 in a side view of a first side 46 perpendicular to the tool plane E, for example Figure 2. In an imaginary side view perpendicular to the tool plane E, the cover outer contour 18 completely surrounds the housing opening 15. When the cover outer contour 18 is projected into the tool plane E in a direction perpendicular to the tool plane E, the cover outer contour line 18 delimits an imaginary cover surface 19 in the tool plane E. In a side view perpendicular to the first side 46 of the tool plane E, within the cover outer contour 18, the filter cover 13 has no openings for the inlet of cooling air into the work tool 1 on at least 85%, in particular at least 90%, in the present embodiment at least 95% of the cover surface 19. The imaginary projection of the filter cover 13 onto the tool plane E in a direction perpendicular to the tool plane E within the cover outer contour projected onto the tool plane E in the same manner has no openings for the inlet of cooling air into the work tool 1 on at least 85%, in particular at least 80%, in the present embodiment at least 95%. The term "opening" should also be understood in conjunction with the filter cover 13 as defined above. This relates to the proportion of the through-opening visible in a view perpendicular to the tool plane E on the first side 46 .

[0086] The air filter 12 has a filter outer contour 38 in an imaginary projection toward the tool plane E in a direction perpendicular to the tool plane E, as shown in FIG. Figure 2 or Fig. 9 . The filter outer contour 38 delimits an imaginary filter surface 39 in the tool plane E. The filter surface 39 is at least 60 square centimeters, in particular at least 70 square centimeters, in particular at least 80 square centimeters, in particular at least 85 square centimeters, in particular at least 100 square centimeters, in particular at least 125 square centimeters. In this embodiment, the filter surface 39 is at most 100 square centimeters, in particular at most 90 square centimeters.

[0087] Although in Figure 2 Schematically, the cover surface 19 and the filter surface 39 are drawn with the same dashed line. In reality, however, the cover surface 19 is larger than the filter surface 39. The cover surface 19 is at least 101%, in particular at least 110%, in the present embodiment at least 120% of the filter surface 39. The cover surface 19 is at most 160%, in particular at most 150%, in the present embodiment at most 140% of the filter surface 39.

[0088] like Figure 6As shown in , the filter cover 13 has a pressing rib 16 for pressing the air filter 12 against the housing 5. The pressing rib 16 extends from the cover of the filter cover 13 in the direction of the base 37. The pressing rib 16 presses the air filter 12 against the base 37. The pressing rib 16 extends in a direction transverse to the tool plane E. The pressing rib 16 penetrates the space between the filter cover 13 and the base 37. In this embodiment, the pressing rib 16 is arranged in the region of the lower inlet opening 11. The pressing rib 16 can also be arranged in the region of the inlet opening 4. The pressing rib 16 is arranged in the edge region of the air filter 12.

[0089] The pressing ribs 16 are deeper in the flow direction of the cooling air than they are wide in a direction transverse to the flow direction. In the present embodiment, the pressing ribs 16 arranged in the region of the lower inlet opening 4 have a width b measured in the longitudinal direction 50 and a depth t measured in the upward direction 49 ( Figure 6 ). The depth t is greater than the width b. The depth t is at least 150% of the width b. Between the pressing ribs 16, the cooling air entering through the lower inlet opening 11 can penetrate into the air filter 12 and penetrate into the housing 5 through the housing opening 15. In the present embodiment, a closed pressing strip 31 is arranged in the region of the inlet opening 4. The pressing strip 31 presses the air filter 12 against the housing 5. Above the pressing strip 31, an air channel opening 30 is provided in the filter cover 12.

[0090] Cooling air can enter the filter cover 12 through the inlet opening port 4 and enter the air filter 12 through the air channel opening and be transmitted into the housing 5 through the housing opening 15 .

[0091] like Figure 3As shown in , the working device 1 can be placed on a horizontal surface in the storage position. The bottom 17 of the housing 5 faces the horizontal surface in the storage position. The housing 5 has a housing cover 20 arranged opposite to the bottom 17. The housing cover 20 delimits the housing 5 of the working device 1, especially in the upward direction 49. The bottom 17 delimits the housing 5 of the working device 1, especially in the direction opposite to the upward direction 49. The housing 5 has a first side 21. The first side 21 connects the housing cover 20 to the storage surface 17. The housing 5 of the working device 1 has a second side 41. The second side 41 connects the housing cover 20 to the storage surface 17. The first side 21 is arranged opposite to the second side 41. The first side 21 delimits the housing 5 on the first side 46 of the tool plane E in a direction perpendicular to the tool plane E. The second side 41 delimits the housing 5 of the working device 1 on the second side 47 of the tool plane. The first side 21 extends between the housing cover 20 and the bottom 17. The air filter 12 is arranged on the first side 21 of the housing 5. The housing opening 15 is arranged in or on the first side surface 21. In this embodiment, the housing opening 15 completely penetrates the first side surface 21. However, it can also be provided that the housing opening 15 is only a recess in the housing 5. The air filter 12 is arranged in or at the housing opening 15. Figure 2 The imaginary filter surface 39 shown in the figure is at least 5%, in particular at least 10%, in particular at least 15% of the housing surface 9, and in the present embodiment is less than 30%, in particular less than 20%, in particular less than 15% of the housing surface.

[0092] The air filter 12 is in contact with the edge of the housing opening 15. The housing opening is delimited by the area where the air filter 12 does not contact the housing outer wall 10. In this area, the air filter 12 continues the housing outer wall 10 to a certain extent. Figure 2 As shown, the housing opening 15 has an opening outer contour 28 in an imaginary projection perpendicular to the tool plane E onto the tool plane E. The opening outer contour 28 delimits an imaginary opening surface 29. The opening surface 29 extends in the tool plane E. Figure 2 In the embodiment, the opening surface 29 and the cover surface 19 are schematically drawn with the same dotted line. In fact, the cover surface 19 is larger than the opening surface 29. The opening surface 29 is at least 5%, in particular at least 10%, and in the present embodiment at least 11% of the housing surface 9.

[0093] The opening surface 29, in particular the filter surface 39, is at least 60 square centimeters, in particular at least 70 square centimeters, in particular at least 80 square centimeters, in particular at least 85 square centimeters, in particular at least 100 square centimeters, in particular at least 125 square centimeters, in the present embodiment at most 100 square centimeters, in particular at most 90 square centimeters. These surfaces are measured in the projection into the tool plane E. These surfaces are measured in particular in a side view perpendicular to the tool plane E.

[0094] The air filter 12 has an actual surface. In particular, the actual surface is a curved surface, in particular a curved surface in a mathematical sense. The actual surface corresponds to the surface of the air filter 12, in particular the integrated area of ​​one side of the air filter element of the air filter 12. Suitably, the actual surface is larger than the filter surface 39 projected onto the tool plane E. In particular, the actual surface is at least 140%, in particular at least 160%, in particular at least 200% of the filter surface 39 projected onto the tool plane 39. As a result, the filtering effect can be good in a small space, in particular in the case of a small filter surface 39 projected onto the tool plane. In particular, the air filter 12, in particular the air filter element, has a folded portion. In particular, the air filter 12, in particular the air filter element is a pleated portion.

[0095] In particular, the actual surface area of ​​the air filter is at least 150 cm 2 , in particular 225 cm 2 , in particular at least 275 cm 2 .

[0096] In particular, the actual surface of the air filter 12 is at least 8%, in particular at least 10%, in particular at least 15%, in particular at least 25%, in particular at least 30%, in particular at least 35%, in particular at least 38% of the housing surface 9 projected onto the tool plane E.

[0097] The actual face of the air filter 12 may be designed for all of the embodiments described above.

[0098] like Figure 3 , the air filter 12 is inclined in the upward direction 49 toward the first side 21 of the working tool 1, so that dirt can be separated from the air filter 12 and fall due to gravity. The air filter 12 is directed away from the tool plane E in the upward direction 49. The working tool 1 is designed so that due to the gravity of the air filter 12, the separated and fallen dirt can fall from the working tool 1 through the lower inlet opening 11. The lower inlet opening 11 serves as a dirt outlet. In the present embodiment, the air filter 12 is inclined at an angle a of at least 5° relative to the upward direction 49. In this embodiment, the air filter 12 extends substantially in one plane.

[0099] like Figure 3 As can be seen, the access opening 4 is visible, in particular completely visible, in the longitudinal direction 50 in a view toward the rear end 3 of the work tool 1. In this embodiment, the access opening 4 is uncovered, in particular completely uncovered, in the longitudinal direction 50 in a view toward the rear end 3 of the work tool 1.

[0100] In this embodiment, a battery pack is provided to supply energy to the motor 7 which is designed as an electric motor. The handheld working tool 1 is a working tool operated by a battery. Figure 2 and Figure 4 As shown in FIG. 5 , the housing 5 has a receiving compartment 22 for the battery pack. The receiving compartment 22 has a receiving opening 23. Through the receiving opening 23, the battery pack can be pushed into the receiving compartment 22. The battery pack can be pushed into the receiving compartment 22 in the pushing direction 48. Figure 2 As can be seen in FIG. 4 , the first side 21 does not have a receiving opening 23 for the receiving compartment 22 of the battery pack. The receiving opening 23 for the receiving compartment 22 of the battery pack extends only in the housing cover 20 of the housing 5. The insertion direction 48 extends parallel to the tool plane E. The receiving opening 23 surrounds the insertion direction 48 in a closed manner. When the battery pack is pushed into the receiving compartment 22, the battery pack is introduced into the receiving compartment 22 essentially in the opposite direction of the upward direction 49 downward through the receiving opening 23.

[0101] The imaginary projection of the air filter 12 onto the tool plane E in a direction perpendicular to the tool plane E and the imaginary projection of the receiving bin 22 onto the tool plane in a direction perpendicular to the tool plane E overlap in the tool plane. With respect to a direction transverse to, in particular perpendicular to, the tool plane E, the receiving bin 22 and the air filter 12 are arranged one after the other, in particular at a certain distance from one another.

[0102] Cooling air is sucked into the work implement 1 from a blower of the work implement 1 (not shown) and guided along a flow path 26. The flow path 26 is Figure 1 , 3 4 are schematically indicated by dashed lines. The cooling air enters the work tool 1 through the inlet opening 4. In this embodiment, it is additionally provided that the cooling air can enter through the lower inlet opening 11. The cooling air flows through the inlet opening 4 in the direction of the longitudinal direction 50. The cooling air first enters the space between the filter cover 13 and the air filter 12 through the inlet opening 4. The cooling air then flows through the air filter 12 and the housing opening 15 located behind it.

[0103] In this case, the cooling air in this embodiment flows into the interior of the housing 5 in a direction transverse to the tool plane E. It can also be provided that the cooling air initially enters only the recess of the housing 5 when passing through the housing opening 15 and then enters the interior of the housing 5 through another opening. Figures 9 to 12 This is the case in the embodiment of Figures 1 to 8In the exemplary embodiment of , the cooling air flows into the interior of the housing 5 in a direction transverse to the longitudinal direction 50. The cooling air enters the housing 5 in the work tool 1 through the housing opening 15. Inside the housing 5, the cooling air then flows along the flow path 26 in the upward direction 49 and flows to the electronics of the motor, which is designed as an electric motor 7. In this case, the electronics of the electric motor are cooled. The cooling air then flows counter to the upward direction 49 to the motor 7, which is designed as an electric motor. The cooling air leaves the work tool 1 through the opening in the bottom 17.

[0104] Due to the arrangement of the air filter on the first side 21, the filter surface 39 can be designed to be very large. In addition, the air filter 12 is thus easily accessible and can be replaced in a simple and comfortable manner. Since the cooling air enters the working device 1 through the inlet opening 4 in the longitudinal direction 50, the inlet opening 4 can be designed so that the effective surface of the inlet opening 4 pointing in the direction perpendicular to the tool plane E (referred to as the opening above) is smaller. The inlet opening 4 can thus even be designed so that the effective surface is zero. As a result, dirt that would enter the working device 1 in the direction perpendicular to the tool plane E cannot enter the working device 1 or only enters the working device 1 to a small extent through the inlet opening 4. This is particularly advantageous during felling using a working device 1 configured as a motor chain saw.

[0105] Figures 9 to 12 An alternative embodiment is shown, in which, according to Figures 1 to 8 In contrast, the embodiment of FIG. 5 is provided such that the cooling air enters the work tool 1 substantially in a direction transverse to the longitudinal direction 50 , in particular in a direction perpendicular to the longitudinal direction 50 . Fig. 9 In the embodiment of the invention, the cooling air enters the working tool 1 in a direction transverse to the tool plane E, in particular in a direction perpendicular to the tool plane E. Fig. 9 In the embodiment of the invention, the lateral inlet opening 62 is provided for letting cooling air into the work tool 1. Fig. 9 In the embodiment of the invention, the air filter 12 forms part of the outer side of the working tool 1. Figures 1 to 8 , especially Figures 1 to 4 The above description also applies to Figures 9 to 12 Corresponding components are marked with the same reference numerals.

[0106] When based on Figures 9 to 12 When the cooling air is sucked into the interior of the work tool 1 by a blower (not shown), in particular a blower impeller (not shown), the cooling air enters the work tool 1 directly through the air filter 12. The cooling air follows the flow path 26 ( Fig.11 ).

[0107] In accordance with Figures 9 to 12 In an alternative embodiment of the invention, the housing 5 is provided with a housing opening 115, which is configured as a recessed portion in the first side surface 21. The air filter 12 is arranged in, at or on the housing opening 115 configured as a recessed portion. The housing opening 115 does not completely penetrate the wall of the housing 5. In this embodiment, the air filter 12 continues the surface contour formed by the housing 5. The housing opening 115 is a concave cavity. The housing opening 115 configures a cavity bounded by the air filter 12. After entering the working tool 1 through the air filter 12, the cooling air flows into the cavity before flowing into the interior of the housing 5. Through the housing opening 115, a cavity is constructed between the housing 5 and the air filter 12. The housing opening 115 has an edge, and the air filter 12 is attached to the edge. The housing opening 115 is also referred to as a side recessed portion of the housing.

[0108] The housing 5 has Figures 10 to 12 145. The wall penetration opening 145 completely penetrates the wall of the housing 5. The wall penetration opening 145 is arranged in the housing opening 115 of the housing 5. The wall penetration opening 145 is arranged in the housing opening 115 of the housing 5 that is configured as a recess. Through the wall penetration opening 145, cooling air can flow from the housing opening 115 configured as a recess into the interior of the housing 5.

[0109] Fig. 9 The tool plane E shown in Figure 3 The tool plane E has a Figure 3 The tool plane E has a second side 47. The tool plane E separates the first side 46 from the second side 47. The air filter 12 is arranged completely on the first side 46 of the tool plane E. Fig. 9 In FIG. 4 , the work tool 1 is shown in a view facing the first side 46 of the tool plane E. In FIG.

[0110] like Fig.10 Shown in FIG. 1 is a side view of the housing opening 115 designed as a recess in the direction of the first side 46 perpendicular to the tool plane E and, when the filter 12 is removed, is larger than the wall penetration opening 145 , in particular larger than the surface of the wall penetration opening 145 .

[0111] like Fig. 9 As shown in FIG. 1 , the housing opening 15 has an opening outer contour 28 in an imaginary projection onto the tool plane E in a direction perpendicular to the tool plane E. The opening outer contour 28 delimits an imaginary opening surface 29. The opening surface 29 extends in the tool plane E. Fig. 9In FIG. 1 , the opening face 29 and the filter face 39 are schematically drawn with the same dashed line. The filter face 39 is the face bounded by the outer contour of the filter 12 projected into the tool plane E, as shown in FIG. Figures 1 to 8 Just as described.

[0112] The opening surface 29, in particular the filter surface 39, is at least 60 square centimeters, in particular at least 70 square centimeters, in particular at least 80 square centimeters, in particular at least 85 square centimeters, in particular at least 100 square centimeters, in particular at least 125 square centimeters, in the present embodiment at most 100 square centimeters, in particular at least 90 square centimeters. These surfaces are measured in the projection into the tool plane E. These surfaces are measured in particular in a side view perpendicular to the tool plane E.

[0113] Figures 10 to 12 The wall penetration opening 145 shown in has an actual penetration surface. In particular, the actual penetration surface is a curved surface, in particular a curved surface in a mathematical sense. The actual penetration surface corresponds to the integrated area of ​​the wall penetration opening 145. Suitably, the actual penetration surface is smaller than the opening surface 29 projected onto the tool plane E, in particular smaller than the filter surface 39.

[0114] The penetration surface is smaller than the filter surface 39 , in particular smaller than the opening surface 29 .

[0115] In particular, the actual penetration surface is a maximum of 40% of the opening surface 29 projected onto the tool plane E, in particular the filter surface 39 projected onto the tool plane E, in particular a maximum of 30%, in particular a maximum of 20%, in particular a maximum of 10%, in particular a maximum of 6%.

[0116] In particular, the actual penetration surface is at least 1%, in particular at least 3%, in particular at least 5%, in particular at least 10% of the opening surface 29 projected onto the tool plane E, in particular the filter surface 39 projected onto the tool plane E.

[0117] In particular, the actual penetration area is at least 200 square millimeters, in particular at least 300 square millimeters, in particular at least 400 square millimeters.

[0118] In particular, the actual penetration area is a maximum of 1200 square millimeters, in particular a maximum of 800 square millimeters, in particular a maximum of 600 square millimeters.

[0119] In particular, the opening surface 29 projected onto the tool plane E, in particular the filter surface 39 projected onto the tool plane E, is at least 60 square centimeters, in particular at least 80 square centimeters.

[0120] In particular, the opening surface 29 projected onto the tool plane E, in particular the filter surface 39 projected onto the tool plane E, is a maximum of 100 square centimeters, in particular a maximum of 90 square centimeters.

[0121] Through the wall penetration opening 145, cooling air can be sucked into the housing interior 139 of the housing 5. Through the wall penetration opening 145, cooling air can penetrate into the housing interior 139 of the housing 5. The recess formed by the housing opening 115 is arranged between the air filter 12 and the wall penetration opening 145, in particular, functionally arranged between the air filter 12 and the wall penetration opening 145, in particular, arranged between the air filter 12 and the wall penetration opening 145 with respect to the path of the cooling air along the cooling air path 26. The cooling air path 26 is arranged in an area outside the housing interior 139. Fig.11 In the region within the housing interior 139, the cooling air path 26 is shown in dashed lines. In the region of the recess formed by the housing opening 115, the cooling air is located outside the housing interior 139. The cooling air enters the housing interior 139 of the housing 5 only when it passes through the wall penetration opening 145. In the housing interior 139, the motor 7 and a blower (not shown), in particular a blower wheel (not shown), are arranged.

[0122] The air filter 12 covers both the housing opening 115 designed as a recess and the wall penetration opening 145 .

[0123] The cooling air is filtered between the air filter 12 and the wall penetration opening 145. Fig.11 The region of the flow path 26 downstream of the air filter 12 drawn in by the midpoint line is referred to as the clean air space 114 . The housing opening 15 designed as a recess in the housing 5 is part of the clean air space 114 .

[0124] The housing opening 15, which is designed as a recess in the housing 5, delimits the flow path 26 in a funnel shape in the region between the air filter 12 and the wall penetration opening 145. After the cooling air has been filtered by the air filter 12, the effective flow cross section along the flow path 26 is reduced. On the way from the air filter 12 to the wall penetration opening 145, when passing through the air filter 12, in particular the opening surface 29, in particular the filter surface 39, the flow cross section for the cooling air is reduced to less than 30%, in particular less than 20%, in particular less than 20%, in particular less than 10%, in particular less than 6%, in particular more than 2%, in particular more than 4% of the flow cross section.

[0125] In accordance with Figures 9 to 12In the embodiment of the present invention, the air filter 12 is an external component of the working device 1. The air filter 12 forms a part of the outer side of the working device 1. The air filter 12 continues the first side 21 of the housing 5, especially in the area of ​​the housing opening 115 configured as a recessed portion. In this embodiment, the cooling air initially enters the working device 1 through the air filter 12. Subsequently, the flow cross section for the cooling air is reduced on the path to the wall penetration opening 145. Here, the housing opening 15 configured as a recessed portion is used as a funnel. Due to the initial large flow cross section, the cooling air is effectively filtered through the air filter 12. Due to the reduction of the flow cross section until the wall penetration opening 145, the flow velocity of the cooling air is significantly increased. As a result, a good cooling effect can be achieved using the cooling air in the housing interior space 139.

Claims

1. A motor chain saw or a cutting machine with a tool (6), the tool having a tool plane (E) and an operating handle (34), wherein: The longitudinal direction (50) extends from the operating handle (34) to the tool (6), wherein the motor chain saw or the cutting machine comprises: - a housing (1) having a housing opening (15) for drawing cooling air into the housing (5), - an electric motor (7) arranged in the housing (5) and used to drive the tool (6); an air filter (12) arranged at or in the housing opening (15, 115); The motor chain saw or the cutting machine can be placed on a horizontal surface in a storage position, the housing (5) has a bottom (17) facing the horizontal surface in the storage position, the housing (5) has a housing cover (20) arranged opposite the bottom (17), the housing (5) has a side surface (21) which connects the housing cover (20) and the bottom (17) to each other and limits the motor chain saw or the cutting machine in a longitudinal direction (50) in a direction perpendicular to the tool plane (E), and the air filter (12) is arranged in The housing (5) is located on a side surface (21) of the housing (5), and the housing (5) has a housing outer contour (8) in a side view perpendicular to the tool plane (E), and the housing outer contour limits an imaginary housing surface (9) in an imaginary projection onto the tool plane (E) in a direction perpendicular to the tool plane (E), and the air filter (12) has a filter outer contour (38) in an imaginary projection onto the tool plane (E) in a direction perpendicular to the tool plane (E), and the filter outer contour limits an imaginary filter surface (39), and the filter surface (39) is at least 5% of the housing surface (9).

2. The motor chain saw or cutting machine according to claim 1, characterized in that: The shell opening (15, 115) is arranged on the side surface (21) of the shell (5), and the shell opening (15, 115) has an opening outer contour (28) in an imaginary projection onto the tool plane (E) in a direction perpendicular to the tool plane (E), and the opening outer contour limits an imaginary opening surface (29), and the opening surface (29) is at least 5% of the shell surface (9).

3. The motor chain saw or cutting machine according to claim 1, characterized in that: The filter surface (39) is at least 60 cm2.

4. The motor chain saw or cutting machine according to claim 1, characterized in that: The upward direction (49) extends in a direction transverse to the longitudinal direction (50) and in a direction parallel to the tool plane (E), and the air filter (12) is inclined toward the first side (21) of the motor chain saw or the cutting machine in the upward direction (49), so that dirt can fall out of the air filter (12) due to gravity and fall.

5. The motor chain saw or cutting machine according to claim 1, characterized in that: The filter (12) can be fastened to the housing (5) via a single fastening element (14).

6. The motor chain saw or cutting machine according to claim 1, characterized in that: The housing (5) has a receiving compartment (22) for a battery pack, the battery pack can be pushed into the receiving compartment (22) through a receiving opening (23) of the receiving compartment (22) along a pushing direction (48), and the side surface (21) does not have the receiving opening (23).

7. The motor chain saw or cutting machine according to claim 6, characterized in that: The insertion direction (48) runs parallel to the tool plane (E).

8. The motor chain saw or cutting machine according to claim 6, characterized in that: The imaginary projections of the air filter (12) and the receiving bin (22) onto the tool plane (E) in a direction perpendicular to the tool plane (E) overlap in the tool plane (E).

9. The motor chain saw or cutting machine according to claim 1, characterized in that: The air filter (12) is a fine filter.

10. The motor chain saw or cutting machine according to claim 1, characterized in that: The air filter (12) has an actual surface, which is a curved surface, corresponds to the integrated area of ​​one side of the surface of the air filter (12), and is larger than the filter surface (39) projected onto the tool plane (E).

11. The motor chain saw or cutting machine according to claim 10, characterized in that: The actual surface area of ​​the air filter (12) is at least 150 square centimeters.

12. The motor chain saw or cutting machine according to claim 10, The actual surface of the air filter (12) is at least 8% of the housing surface (9) projected onto the tool plane (E).

13. The motor chain saw or cutting machine according to claim 1, characterized in that: The air filter (12) forms part of the outer side of the working tool (1), the housing opening (15, 115) is constructed as a recessed portion in the first side surface (21), thereby constructing a cavity between the outer side of the first side surface (21) and the air filter (12), and a wall penetration opening (145) is constructed in the housing opening (15, 115), which completely penetrates the wall of the housing (5).

14. The motor chain saw or cutting machine according to claim 13, characterized in that The wall penetration opening (145) has a penetration surface, and the penetration surface is smaller than the filter surface (39).

15. The motor chain saw or cutting machine according to claim 14, characterized in that The penetration surface is at most 30% of the filter surface (39).

16. The motor chain saw or cutting machine according to claim 13, characterized in that The penetration surface is at most 1500 square millimeters.

17. The motor chain saw or cutting machine according to claim 1, characterized in that: The motor chain saw or the cutting machine comprises an inlet opening (4) for letting cooling air into the motor chain saw or the cutting machine, the motor chain saw or the cutting machine comprises an air filter (12) for filtering the cooling air, the air filter (12) being arranged only on a first side of the tool plane (E), the inlet opening (4) being arranged such that cooling air can flow through the inlet opening (4) along the longitudinal direction (50), the housing (5) having a housing outer contour (8) in a side view perpendicular to the first side (46) of the tool plane (E), the housing outer contour delimiting an imaginary housing surface (9) in an imaginary projection onto the tool plane (E) in a direction perpendicular to the tool plane (E), and the motor chain saw or the cutting machine having no opening for letting cooling air into the motor chain saw or the cutting machine on at least 95% of the housing surface (9) within the housing outer contour (8) in a side view perpendicular to the first side (46) of the tool plane (E).

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