EP4084934A1 - Werkzeugmaschine und verfahren zu einem kühlen einer antriebseinheit der werkzeugmaschine - Google Patents
Werkzeugmaschine und verfahren zu einem kühlen einer antriebseinheit der werkzeugmaschineInfo
- Publication number
- EP4084934A1 EP4084934A1 EP20816145.5A EP20816145A EP4084934A1 EP 4084934 A1 EP4084934 A1 EP 4084934A1 EP 20816145 A EP20816145 A EP 20816145A EP 4084934 A1 EP4084934 A1 EP 4084934A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- fluid
- machine tool
- fluid cooling
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 258
- 238000000034 method Methods 0.000 title claims description 23
- 239000012530 fluid Substances 0.000 claims abstract description 422
- 238000000926 separation method Methods 0.000 claims description 85
- 238000009792 diffusion process Methods 0.000 description 15
- 238000013461 design Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 9
- 238000003754 machining Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/008—Cooling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/028—Angle tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
Definitions
- a machine tool with at least one housing unit, with at least one drive unit arranged within the housing unit and with at least one separation unit has already been proposed, the separation unit being provided to divide at least one fluid flow directed through the housing unit into at least two partial flows, whereby a partial flow of the partial flows has a higher foreign body density compared to another partial flow of the partial flows.
- the invention is based on a machine tool, in particular a hand-held machine tool, with at least one housing unit, with at least one drive unit arranged within the housing unit and with at least one separation unit which is provided to conduct at least one fluid flow, in particular in Depending on a foreign body density, to be divided into at least two partial flows, one partial flow of the partial flows having a higher foreign body density compared to another partial flow of the partial flows.
- the machine tool comprises at least one Fluidküh treatment unit, which is provided to the drive unit by means of the to cool at least two partial flows, in particular the partial flow and the other partial flow.
- Provided is to be understood in particular as specifically programmed, specially designed and / or specially equipped.
- the fact that an object, in particular the fluid cooling unit, is intended to perform a specific function, in particular to cool the drive unit by means of the at least two partial flows, should be understood in particular to mean that the object can perform this specific function in at least one application and / or or operating condition fulfilled and / or carried out.
- the fluid stream comprises a plurality of
- Foreign bodies in particular a number, a volume and / or a mass of foreign bodies per unit volume, for example per cm 3 , indicating the foreign body density in the fluid flow.
- the foreign bodies in the fluid flow and / or the partial flows are formed as dust particles, as residues from a machined workpiece, in particular metal chips, as impurities in the fluid flow or the like.
- the fluid flow and / or the partial flows are / is at least partially, in particular at least mostly partially, formed from air.
- the fluid cooling unit preferably comprises at least one intake opening, which in particular is delimited by the housing unit. In particular, the intake opening is on a processing area of the
- the fluid cooling unit preferably comprises at least one outlet opening which is at least partially delimited by the housing unit and is preferably arranged at a distance from the intake opening.
- the partial flow and / or the other partial flow includes a value other than zero for the foreign body density.
- the fluid cooling unit is preferably designed such that when the drive unit is cooled by means of the partial flows, in particular the partial flow and / or the further partial flow, thermal energy is transferred from the drive unit to the partial flows, in particular the partial flow or the further partial flow.
- the fluid cooling unit is preferably provided to conduct the heat transferred to the partial flows, in particular the partial flow or the further partial flow, via the partial flows, in particular the partial flow or the further partial flow, out of the machine tool, in particular the housing unit.
- the separation unit is preferably designed such that a value of the foreign body density of the partial flow is in particular at least 50%, preferably at least 70%, preferably at least 80% and particularly preferably at least 90% greater than a value of the foreign body density of the other partial flow wherein in particular the foreign bodies have a size, in particular a mean diameter, of at least 500 ⁇ m, preferably at least 100 ⁇ m and particularly preferably at least 20 ⁇ m.
- the separation unit is preferably provided to divide the fluid flow into the partial flow and the other partial flow via a geometrical design of a guide path of the, in particular sucked in, fluid flow, with in particular the
- Partial flow compared to the other partial flow has a higher foreign body density.
- the separation unit is preferably provided to direct the partial flow and the other partial flow, in particular from the guide section, to various partial guide sections.
- the fluid cooling unit is preferably provided to guide the fluid flow via the intake opening through at least one duct element to the separation unit.
- the channel element is at least substantially completely arranged within the housing unit. “Essentially completely” is to be understood to mean, in particular, an indication of a portion of a component, in particular of the channel element, which has a certain property, in particular of being enclosed by the housing unit, in particular at least 90%, preferably at least 95% and particularly preferably at least 98% of a total volume and / or a total mass of the component has the property.
- the separation unit and the fluid cooling unit are preferably designed in one piece, with a channel element of the fluid cooling unit in particular being provided to limit the fluid flow on the guide section and / or the partial guide sections.
- at least one separating element of the separating unit is designed as a channel element of the fluid cooling unit and, in particular, delimits at least one fluid channel to a line of the fluid.
- “In one piece” is to be understood as integrally connected, such as by a welding process and / or adhesive process, etc., and particularly advantageously molded, such as by manufacturing from a cast and / or by manufacturing in a single or multi-component injection molding process.
- the fluid cooling unit is preferably provided for the purpose of converting the partial flows into one after flowing through the separation unit To direct cooling of the drive unit at least partially in the direction of the drive unit.
- the machine tool is preferably designed as a hand-held machine tool.
- the machine tool is designed as an angle grinder, as a drill, as a suction device, as a screwdriver or the like.
- the drive unit is designed as a motor, in particular an electric motor.
- the drive unit, the separation unit and / or the fluid cooling unit, in particular with the exception of the inlet opening and / or the outlet opening, are / is preferably arranged at least substantially completely within the housing unit.
- the inventive design of the machine tool in particular without contamination of the drive unit, advantageously ai ve cooling of the drive unit can be made possible, especially since the partial flow and the other partial flow can be used to cool the drive unit.
- An advantageously high level of energy efficiency can be achieved when the drive unit is cooled, in particular since an aspirated fluid flow can be used entirely for cooling the drive unit.
- the separation unit comprises at least one separation element designed as a channel element, which is arranged in close proximity to the drive unit and is provided to divide the fluid flow.
- An advantageously effective cooling of the drive unit can be achieved by means of the partial flows.
- An advantageously compact design can be made possible since the partial flows can only be divided before they flow past the drive unit.
- the separation element is provided to guide the fluid flow on the guide path and to divide it into the partial flow and the other partial flow.
- the separating element is preferably designed as a passive element, the separating element in particular being provided to divide the fluid flow via a shape of the separating element, in particular when the fluid flow flows through.
- the separation element is static or immovable Lich.
- the separating element preferably forms at least one fluid inlet for conducting the fluid flow and at least two fluid outlets for conducting of the partial flow or the other partial flow.
- the separating element preferably has an at least partially curved basic shape in a sectional plane comprising the guide path and / or at least one of the partial guide paths.
- the separation element is preferably designed in such a way that the guide path is in a region of the fluid inlet to the
- Partial guide section of the other partial flow in a region of one of the fluid outlets has an angle of in particular at least 30 °, preferably at least 60 ° and particularly preferably at least 80 °.
- the separating element preferably has at least one basic shape which is designed in such a way that foreign bodies are guided onto a path deviating from a guide path of the fluid flow, in particular of the other partial flow.
- the separation element is designed in such a way that the partial flow is at least partially separated from the other partial flow.
- the separating element is preferably arranged on the fluid cooling unit or designed as part of the fluid cooling unit.
- the separation element is preferably designed in one piece with the fluid cooling unit, in particular at least one channel element of the fluid cooling unit.
- the separation unit in particular the separation element, is preferably fluid-technically formed between the intake opening and the drive unit.
- the fact that “the separating element is arranged in the vicinity of the drive unit” should in particular be understood to mean that the separating element is arranged, in particular completely, within an area around the drive unit which is within a minimal distance of at most 150 mm, preferably at most 100 mm mm and particularly preferably at most 50 mm to extend around the drive unit.
- the separating element arranged in the vicinity of the drive unit is preferably arranged, in particular fastened, directly on the drive unit, in particular a housing of the drive unit. It is conceivable that the separating element arranged in the vicinity of the drive unit is designed in one piece with the drive unit, in particular the housing of the drive unit.
- the fluid cooling unit comprises at least one, in particular the aforementioned, channel element which is provided to guide the partial flow, in particular separately from the other partial flow, at least partially past an outer wall of the drive unit.
- the drive unit can become contaminated with foreign bodies in the partial flow Cooling of the drive unit with the partial flows can be advantageously prevented. Unwanted abrasive damage to the drive unit, in particular location stanchions and / or windings of the drive unit, can advantageously be prevented.
- the separation unit and / or the fluid cooling unit are designed such that the partial flow, in particular in an area along the drive unit, is passed through the housing unit at least for the most part separately from the other partial flow.
- the fluid cooling unit is preferably provided to direct the other partial flow for cooling the drive unit into or through the drive unit.
- the channel element is arranged outside of the drive unit on the outer wall.
- the channel element is particularly preferably arranged directly on the drive unit, in particular the outer wall.
- the channel element rests flat against the outer wall.
- the channel element is particularly preferably provided to transfer heat from the drive unit, in particular the outer wall, to the partial flow, with the drive unit being cooled in particular by the partial flow.
- the channel element preferably extends along an entire length of the drive element on the outer wall.
- the channel element is preferably at least partially, in particular at least largely, made of a thermally conductive material which, in particular, has a thermal conductivity of in particular at least 10 W / (mK), preferably at least 40 W / (mK), preferably at least 100 W / (mK) and particularly preferably at least 200 W / (mK).
- the channel element is preferably designed to be at least substantially rectilinear, in particular along an entire length of the outer wall. In particular, the channel element is at least for the most part at least in
- Essentially parallel to the outer wall in particular an outer surface of the outer wall which faces the channel element or at least partially rests on the channel element.
- "Essentially parallel” is to be understood here in particular as an alignment of a direction, in particular a main direction of extent of the channel element, relative to a reference direction, in particular a main direction of extent of the outer wall and / or the outer surface of the outer wall, the direction opposite to the reference direction, in particular in at least one projection plane has a deviation in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
- a “main extension direction "direction" of an object in particular the outer wall and / or the outer surface of the outer wall, is to be understood in particular as a direction which runs parallel to a longest edge of a smallest geometric cuboid which just completely surrounds the object.
- the separation unit comprises at least one conveyor unit which is arranged within the fluid cooling unit and is provided to convey at least the partial flow out of or through the housing unit.
- Advantageously effective cooling can be achieved, in particular since high flow velocities of the fluid flows, in particular of the partial flows, can be made possible via the delivery unit.
- a distribution of foreign bodies from the partial flow within the housing unit, the separation unit and / or the fluid cooling unit, in particular in the other partial flow, can advantageously be prevented.
- the delivery unit is designed as a flow pump.
- the conveyor unit is preferably provided to suck in the partial flow via the fluid cooling unit, in particular through the suction opening.
- the conveying unit is preferably provided to convey the fluid flow, in particular along the guide path, through the separation unit and, in particular, by means of a conveying speed and the separation element, into the partial flows, in particular the
- the conveying unit is preferably provided to convey the partial flows, in particular the partial flow and / or the other partial flow, in particular after cooling the drive unit, through the outlet opening out of the machine tool, in particular the housing unit.
- the delivery unit preferably comprises at least one delivery element, which is designed, for example, as a fan wheel, as a blade, as a piston or the like.
- the conveying element is preferably arranged at least partially, in particular at least largely, within the fluid cooling unit, in particular a channel element of the fluid cooling unit.
- the conveying element is preferably arranged behind the drive unit, viewed from the intake opening. In particular, the conveying element is designed in one piece with a fan of the drive unit.
- the conveying element is arranged between the separation unit and the drive unit or, viewed from the intake opening, in front of the separation unit.
- the conveyor unit in particular that, is particularly preferred Conveying element, provided to convey the partial flow and / or the other partial flow through the fluid cooling unit, through the separation unit and / or out of the machine tool or the housing unit.
- the delivery unit comprises at least one delivery element which is designed as an axial fan. An advantageously simple and inexpensive design of the delivery unit can be achieved.
- a fan wheel of the drive unit can advantageously be used as a conveying element for the partial flows. It is conceivable that the conveying element designed as an axial fan is designed as part of the drive unit.
- the För derelement is formed in one piece with a fan wheel of the drive unit.
- the conveying element is preferably arranged fluidtech nically behind the drive unit when viewed from the intake opening.
- the För derelement is arranged in a channel element of the fluid cooling unit, which is provided to a line of the partial flow.
- the conveying element is preferably arranged fluidly behind the separation unit when viewed from the intake opening.
- the För derelement is arranged within the partial routing path of the partial flow. It is also proposed that the delivery unit is provided to the
- the delivery unit is preferably provided, in particular together with the fluid cooling unit, to deliver the partial flows in different directions.
- a conveying element of the conveying unit is preferably designed as a radial fan in at least one area of the conveying element.
- the conveying element is preferably designed as an axial fan in at least one further area of the conveying element.
- the area of the conveying element is preferably enclosed by the further area as viewed along a drive axis of the conveying element.
- the area of the conveying element preferably has a smaller minimal radial distance from the drive axis of the conveying element than the further area of the conveying element.
- the conveying element is, in particular, special two-part, fan wheel designed.
- the conveyor element is particularly preferably arranged behind the drive unit, in particular in terms of fluid technology, preferably viewed from the intake opening.
- the För derelement is designed as part of the drive unit.
- the conveying element is preferably provided to convey the partial flow, in particular in a close range around the conveying element, in a direction that is at least substantially parallel to the drive axis of the conveying element.
- the conveying element is preferably provided to convey the other partial flow, in particular in a vicinity of the conveying element, in a direction that is at least substantially perpendicular to the drive axis of the conveying element.
- Essentially perpendicular should be understood to mean in particular an alignment of one direction, in particular a conveying direction of the other partial flow, relative to a reference direction, in particular a direction running along the drive axis of the conveyor element, the direction and the reference direction, in particular in a projection plane considered one
- the conveying unit is preferably provided to convey the partial flow and the other partial flow in each case through differently designed and / or spaced-apart outlet openings of the fluid cooling unit from the machine tool or the housing unit.
- the separation unit comprises at least one, in particular a further, separation element which is arranged within one, in particular a further, channel element, in particular a main channel element, of the fluid cooling unit and is provided to divide the fluid flow into part of the partial flows along the, in particular further, channel element viewed on a circular path.
- a further, separation element which is arranged within one, in particular a further, channel element, in particular a main channel element, of the fluid cooling unit and is provided to divide the fluid flow into part of the partial flows along the, in particular further, channel element viewed on a circular path.
- the further channel element in particular the main channel element, is tubular and / or hollow-cylindrical and in particular has at least one central axis.
- the central axis of the further channel element, in particular the main channel element is at least substantially parallel, in particular coaxial, to the drive axis, to a longitudinal axis of the machine tool, to a main axis of extension of the fluid cooling unit and / or the machine tool and / or to a direction of propagation of the fluid flow in arranged within the fluid cooling unit.
- the further channel element in particular the main channel element, in particular from a fluid technology point of view, is arranged between the intake opening and the drive unit.
- the delivery unit in particular the delivery element, is provided to deliver the fluid flow from the suction opening through the further duct element, in particular the main duct element, wherein the fluid flow by means of the further separation element along the further duct element and / or the central axis of the further channel element considered is guided on the circular path.
- the fluid flow is divided into the partial flow and the other partial flow, with the partial flow in particular being passed on a path through the further channel element which, in particular due to inertia, has a larger radius to the central axis than a path of the other partial flow through the further channel element.
- Foreign bodies in the partial flow preferably have a path which was a greater distance from a central axis of the further channel element than a path of the other partial flow.
- the separating element designed as a channel element is preferably at least partially funnel-shaped and / or trumpet-shaped.
- the separating element designed as a channel element is arranged behind the further separating element when viewed from the intake opening.
- the separating element is at least partially conical.
- the separating element preferably delimits at least one passage around a central axis of the separating element, which is provided in particular to a line of the other partial flow.
- the separating element is preferably provided to separate the partial flow directed onto the circular path by means of the further separating element from the other partial flow, in particular the partial flow being directed along an outer wall of the separating element into the channel element and wherein in particular the other partial flow is passed through the implementation of the separating element on and / or into the drive unit.
- the, in particular the aforementioned further, separating element is designed as a helical and / or screw-shaped molded part.
- An advantageously simple and inexpensive separation of the fluid flow into the partial flows can be achieved.
- An advantageously compact design of the machine tool, in particular the fluid cooling unit and the separation unit can be made possible, in particular since the fluid flow can be divided within a straight fluid channel.
- An advantageously low wear of the fluid cooling unit and the separation unit, in particular the inner walls, can be achieved, in particular since foreign bodies have a flatter angle to the inner walls of the fluid channels when the fluid flow is divided. As a result, small residues due to foreign bodies can advantageously also be made possible within the fluid cooling unit.
- the further separating element limits, in particular within and / or together with the further channel element, in particular the Hauptkanalele element, a fluid guide channel which extends from the intake opening in the direction of the drive unit along a curve which has a constant slope around a lateral surface of an imaginary cylinder.
- the further separating element is designed as a single-thread screw.
- the further separating element is designed as a two-start, three-start or multiple-start screw.
- the further separation element particularly preferably has a central axis around which the fluid guide channel in particular is wound.
- the central axis of the further separating element is particularly preferably aligned coaxially to a central axis of the further channel element, in particular the main channel element, and / or to the central axis of the separating element, around which the separating element is formed in particular.
- the conveying unit comprises at least one, in particular one further, conveying element which, in particular in terms of fluid technology, is arranged between the suction opening of the fluid cooling unit and the drive unit.
- the conveying element is preferably at least partially, in particular at least largely, within the Fluidküh treatment unit, in particular a channel element of the fluid cooling unit, is arranged.
- conveying element is arranged between the separation unit and the drive unit or between the suction opening and the separation unit.
- the conveying element arranged between the intake opening and the drive unit is intended to convey the partial flow and / or the other partial flow through the fluid cooling unit, through the separation unit and / or out of the machine tool or the housing unit.
- the conveyor unit comprises at least one, in particular the aforementioned or a further conveyor element, which is designed as a spiral wheel.
- the conveying element designed as a spiral wheel is preferably designed as part of the separation unit.
- the conveying element designed as a spiral wheel is provided to divide the fluid flow into the partial flows, with the partial flow in particular having a greater radial distance from the drive axis than the other partial flow.
- a separation element of the separation unit and / or the fluid guide unit is preferably designed such that the partial flow and the other partial flow are passed separately from one another after exiting the conveyor element designed as a spiral wheel or a conveyor area of the conveyor element designed as a spiral wheel.
- the separating element is designed as a funnel, with the other partial flow in particular being directed along a central axis of the funnel, which is in particular arranged coaxially to the drive axis of the conveying element, and the partial flow being guided along an outer wall of the separating element.
- the separation unit and / or the fluid cooling unit comprise / comprises at least one filter element which is provided to change, in particular to reduce, the foreign body density of the fluid flow.
- An advantageously low foreign body density of the fluid flow in particular even before it is divided into the partial flows, can be made possible.
- An advantageously low foreign body density of the partial flow used for cooling the drive unit can be achieved.
- An advantageously low level of contamination or deposition of foreign bodies within the housing unit, the separation unit and / or the fluid cooling unit can be made possible.
- the filter element is arranged, in particular directly, on the intake opening of the fluid cooling unit.
- the filter element in particular a filter surface of the filter element, is preferably at least partially se arranged transversely or at least substantially perpendicular to a flow direction of the fluid flow.
- the filter surface preferably spans an angle with the flow direction of the fluid flow in a region of the filter element or the intake opening, which is a value from a value range of in particular 8 ° to 82 °, preferably 10 ° to 50 ° and particularly preferably 15 ° to 30 °.
- the filter element is at least partially, in particular at least largely, conically shaped.
- the fluid cooling unit comprises at least one, in particular the aforementioned, main channel element for conducting the fluid flow, which is arranged in front of the drive unit when viewed along a main direction of extent of the fluid cooling unit, the conveying element inside the main channel element and / or within one of the main channel elements Ment is arranged limited area of the fluid cooling unit.
- the fluid cooling unit comprises only exactly one guide section along the main direction of extent of the fluid cooling unit in a region of the main duct element, which is in particular arranged within the main duct element.
- the main direction of extent of the fluid cooling unit is preferably aligned at least substantially parallel to a main direction of extent of the drive unit and / or the housing unit and / or to a drive axis of the conveyor element.
- the main channel element particularly preferably extends from the intake opening, in particular along the main direction of extent of the fluid cooling unit, to the separation unit.
- the inventive design of the method can, in particular without contamination of the drive unit, enable advantageously effective cooling of the drive unit, in particular since the partial flow and the other partial flow can be used to cool the drive unit.
- An advantageously high level of energy efficiency can be achieved when the drive unit is cooled, in particular since an aspirated fluid flow can be used entirely for cooling the drive unit.
- An advantageously long service life can be made possible.
- the machine tool according to the invention and / or the method according to the invention should / should not be restricted to the application and embodiment described above.
- the machine tool according to the invention and / or the method according to the invention can have a number that differs from a number of individual elements, components and units as well as process steps mentioned herein in order to fulfill a mode of operation described herein.
- values lying within the stated limits should also be considered disclosed and can be used as required.
- Show it: 1 shows a side view of a longitudinal section of a machine tool according to the invention with an electronic device and a fluid cooling unit,
- Fig. 2 is a schematic representation of a separation unit of the machine tool according to the invention
- FIG. 3 shows a perspective view of a conveying element of a conveying unit of the machine tool according to the invention for conveying a fluid
- Fig. 4 is a schematic representation of a cross section of the electronic electronic device with a round fluid channel
- FIG. 5 shows a schematic representation of an exemplary sequence of a method according to the invention for cooling a drive unit of the machine tool according to the invention
- FIG. 6 shows a schematic representation of an alternative embodiment of a separation unit of a machine tool according to the invention
- Fig. 7 is a side view of a longitudinal section of an alternative design from a machine tool according to the invention with an electronic device and a helical separating element from a separating unit of the machine tool ne,
- Fig. 8 is a side view of a longitudinal section of a further alternati ven embodiment of a machine tool according to the invention with an electronic device,
- Fig. 9 is a schematic representation of a cross section of an alterna tive embodiment of an electronic device of the fiction, contemporary machine tool with an angular fluid channel,
- FIG. 10 is a side view of a longitudinal section of another alternative embodiment of a machine tool according to the invention with an electronic device and a fluid cooling unit with multiple inlet openings
- FIG. 11 is a side view of a longitudinal section of another alternative embodiment of a machine tool according to the invention with an electronic device and a fluid cooling unit with several side inlet openings. Description of the exemplary embodiments
- FIG. 1 shows a side view of a machine tool 10a, the machine tool 10a being shown cut along a plane through a longitudinal axis 12a of the machine tool 10a.
- the machine tool 10a is designed as a hand-held machine tool.
- the machine tool 10a is designed as an electric machine tool.
- the machine tool 10a is designed as an angle grinder.
- other configurations of the machine tool 10a are also conceivable, for example as a drill, as a screwdriver, as a hammer, as a suction device or the like.
- the machine tool 10a has a housing unit 14a.
- the machine tool 10a has a drive unit 16a which is arranged within the housing unit 14a and which is designed in particular as a brushless direct current motor.
- the machine tool 10a comprises an electronic device 17a.
- the machine tool 10a has an electronics unit 18a, which is provided at least for a control and an electrical supply of the drive unit 16a and is formed in particular as part of the electronics device 17a. It is also conceivable that the electronics unit 18a is provided for a control and / or for supplying other components of the machine tool 10a, such as display elements, interfaces or the like.
- the electronics unit 18a is provided for commutating the drive unit 16a.
- the electronics unit 18a comprises a printed circuit board 20a on which, in particular, a processor unit and a memory unit are arranged, which are not shown in particular in FIG.
- the machine tool 10a has a separation unit 22a, which is provided to divide at least one fluid flow 24a conducted through the housing unit 14a, in particular depending on a foreign body density, into at least two partial flows 26a, 28a, one partial flow 26a of the partial flows 26a, 28a has a higher foreign body density compared to another partial flow 28a of the partial flows 26a, 28a.
- the machine tool 10a has a fluid cooling unit 30a which is provided to cool the drive unit 16a by means of the at least two partial flows 26a, 28a.
- the fluid cooling unit 30a is part of the electrical nikvorraum 17a formed.
- the fluid cooling unit 30a is provided for cooling the electronics unit 18a by means of a fluid or the fluid flow 24a.
- the electronics unit 18a is at least for the most part, in particular completely, arranged outside a fluid flow path 32a of the fluid cooling unit 30a.
- the fluid cooling unit 30a is provided for cooling the drive unit 16a and the electronics unit 18a.
- the fluid cooling unit 30a is provided to guide the fluid or the fluid flow 24a through the housing unit 14a.
- the fluid cooling unit 30a comprises a suction opening 34a for drawing in the fluid or the fluid flow 24a.
- the intake opening 34a is delimited by the housing unit 14a and is arranged on a side of the machine tool 10a, in particular the housing unit 14a, facing away from a machining area 38a of the machine tool 10a.
- the suction opening 34a is formed along the longitudinal axis 12a of the machine tool 10a, in particular on an end region 40a of the machine tool 10a formed along the longitudinal axis 12a of the machine tool 10a and at least partially facing away from the machining region 38a.
- the fluid cooling unit 30a comprises a multiplicity of outlet openings 42a, 44a, 46a for discharging the fluid or the fluid flow 24a from the machine tool 10a.
- the outlet openings 42a, 44a, 46a are arranged in an end region 48a of the machine tool 10a facing away from the intake opening 34a.
- the outlet openings 42a, 44a, 46a are arranged in an area around a tool holder 50a of the machine tool 10a.
- One outlet opening 42a of the plurality of outlet openings 42a, 44a, 46a is arranged on a side of the machine tool 10a, in particular the housing unit 14a, facing away from the machining area 38a.
- Two outlet openings 44a, 46a of the plurality of outlet openings 42a, 44a, 46a are arranged on a side of the machine tool 10a, in particular the housing unit 14a, facing the machining area 38a.
- An outlet opening 44a of the two outlet openings 44a, 46a is provided for diverting the partial flow 26a.
- Another outlet opening 46a of the two outlet openings 44a, 46a is provided for discharging the other partial flow 28a.
- the drive unit 16a has a drive axle 52a around which a rotor of the drive unit 16a is driven.
- the drive axis 52a of the drive unit 16a is aligned at least substantially parallel to the longitudinal axis 12a of the machine tool 10a.
- the drive axis 52a of the drive unit 16a is aligned coaxially to a main direction of extent 54a of the fluid cooling unit 30a.
- the fluid cooling unit 30a comprises a channel element, in particular a fluid cooling element 66a, the fluid flow path 32a running at least largely through the channel element, in particular in an area in which the electronics unit 18a is arranged.
- the fluid flow path 32a extends from the intake opening 34a of the fluid cooling unit 30a to the outlet openings 42a, 44a, 46a of the fluid cooling unit 30a.
- the fluid cooling unit 30a has a guide path 58a along which the fluid flow path 32a is formed. In particular, the guide path 58a is formed along a main direction of extent 54a of the fluid flow path 32a.
- the electronics unit 18a is at least for the most part, in particular completely, arranged outside a flow recess 60a enclosed by the fluid cooling unit 30a for conducting the fluid or the fluid flow 24a.
- the fluid cooling unit 30a is designed and / or the electronics unit 18a is arranged in such a way that the electronics unit 18a, in particular via a channel element, in particular the fluid cooling element 66a, of the fluid cooling unit 30a, is spaced apart from the fluid flow path 32a and / or the flow enclosed by the fluid cooling unit 30a recess 60a is arranged.
- the fluid cooling unit 30a is provided to guide the fluid flow 24a via the intake opening 34a through the channel element, in particular the fluid cooling element 66a, past the electronics unit 18a and the drive unit 16a to the outlet openings 42a, 44a, 46a.
- the channel element, in particular the fluid cooling element 66a is arranged at least essentially completely within the housing unit 14a.
- the drive unit 16a, the electronics unit 18a and the fluid cooling unit 30a, in particular with the exception of the intake opening 34a and / or the outlet openings 42a, 44a, 46a, are arranged at least essentially completely within the housing unit 14a.
- the fluid or the fluid flow 24a sucked in via the suction opening 34a comprises a multiplicity of foreign bodies.
- they are Foreign bodies in the fluid flow 24a and / or the partial flows 26a, 28a as dust particles, as residues from a machined workpiece, such as metal chips, as impurities in the fluid flow 24a or the like.
- the fluid or the fluid flow 24a are / is at least partially, in particular at least largely, made of air.
- the fluid cooling unit 30a is designed such that when the drive unit 16a is cooled by means of the partial flows 26a, 28a, in particular the partial flow 26a and the further partial flow 28a, thermal energy is transferred from the drive unit 16a to the partial flows 26a, 28a.
- the fluid cooling unit 30a is provided to conduct the heat transferred to the partial flows 26a, 28a, in particular the partial flow 26a or the other partial flow 28a, via the partial flows 26a, 28a from the machine tool 10a, in particular the housing unit 14a.
- the fluid cooling unit 30a is provided to guide the fluid flow 24a via the suction opening 34a through at least one channel element, in particular the fluid cooling element 66a, of the fluid cooling unit to the separation unit 22a.
- the separation unit 22a and the fluid cooling unit 30a are designed in one piece, with the channel element, in particular the fluid cooling element 66a, of the fluid cooling unit 30a being provided for the purpose of conveying the fluid flow 24a on the guide path 58a and / or on partial guide paths 62a, 64a of the partial flow 28a or the to limit other partial flow 28a.
- the fluid cooling unit 30a is provided to guide the partial flows 26a, 28a after flowing through the separation unit 22a for cooling the drive unit 16a at least partially in the direction of the drive unit 16a.
- the fluid cooling unit 30a comprises the fluid cooling element 66a, on which the electronics unit 18a at least partially rests.
- the electronics unit 18a includes a heat diffusion element 68a for dissipating heat.
- the heat diffusion element 68a is designed as a copper block and is provided to collect and / or transfer heat generated during operation of the electronics unit 18a to the fluid cooling element 66a.
- the electronics unit 18a in particular the heat diffusion element 68a, has at least one support surface 70a (see FIG. 4).
- the electronics unit 18a, in particular the heat diffusion element 68a rests against the fluid cooling element 66a via the support surface 70a.
- the heat diffusion element 68a is off formed a material that has a thermal conductivity of at least 10 W / (mK), preferably at least 50 W / (mK), preferably at least 100 W / (mK), particularly preferably at least 200 W / (mK) and very particularly preferably at least 400 W. / (mK).
- the heat diffusion element 68a is arranged on the circuit board 20a.
- the support surface 70a is designed as a flat surface. However, it is also conceivable that the support surface 70a is at least partially curved.
- the fluid cooling element 66a delimits a fluid channel 72a. The fluid or the fluid flow 24a is passed through the fluid channel 72a or the fluid cooling element 66a past the electronics unit 18a.
- the fluid cooling element 66a is formed in such a way that the fluid channel 72a has a cylindrical shape.
- the fluid cooling element 66a is designed as a channel element to a line of the fluid or the fluid flow 24a, the electronics unit 18a at least partially resting on an outer wall 74a of the fluid cooling element 66a (see FIG. 4).
- the bearing surface 70a rests on the outer wall 74a of the fluid cooling element 66a.
- the heat diffusion element 68a lies over one side on which the bearing surface 70a is arranged, over the full area on the fluid cooling element 66a.
- the fluid cooling element 66a is made of a material, at least in one area where the electronics unit 18a rests, which has a thermal conductivity of at least 10 W / (mK), preferably at least 50 W / (mK), preferably at least 100 W / ( mK), particularly preferably at least 200 W / (mK) and very particularly preferably at least 400 W / (mK).
- the fluid cooling element 66a is formed from aluminum. However, it is also conceivable that the fluid cooling element 66a is formed from another heat-conducting, in particular metallic, material.
- the fluid flow path 32a extends in a near region 76a of the electronic unit 18a at least essentially completely within the fluid cooling element 66a.
- the fluid cooling element 66a is provided, in particular in the vicinity 76a of the electronics unit 18a, to guide an entire fluid flow 24a, which flows into the fluid cooling unit 30a in particular via the intake opening 34a.
- the fluid flow path 32a runs, in particular in the vicinity 76a of the electronics unit 18a, at least essentially completely through the fluid cooling element 66a, in particular the fluid channel 72a.
- the fluid cooling element 66a at least in particular precisely, delimits two fluid channels 72a, the fluid flow path 32a, in particular in the vicinity 76a of the electronics unit 18a, running at least essentially completely through the fluid cooling element 66a, in particular the fluid channels 72a.
- the near region 76a of the electronics unit 18a extends along the main direction of extent 54a of the fluid cooling unit 30a, in particular the fluid cooling element 66a, at least over a complete length 78a of the electronics unit 18a.
- the drive unit 16a viewed from the intake opening 34a, is arranged, in particular in terms of fluid technology, behind the electronics unit 18a and the fluid cooling element 66a.
- the separating unit 22a viewed from the intake opening 34a, is arranged, in particular in terms of fluid technology, behind the electronics unit 18a and the fluid cooling element 66a and in front of the drive unit 16a.
- the separator unit 22a comprises a separator element 80a designed as a channel element, which is arranged in a near region 82a of the drive unit 16a and is provided to divide the fluid flow 24a.
- the separating element 80a is provided to guide the fluid flow 24a on the guide path 58a and to divide it into the partial flow 26a and the other partial flow 28a.
- the separating element 80a is designed as a passive element, the separating element 80a in particular being provided to divide the fluid flow 24a via a shape of the separating element 80a, in particular when the fluid flow 24a flows through.
- the separating element 80a is designed to be static or immobile.
- the separating element 80a is described in detail in the description of FIG.
- the separation unit 22a in particular the separation element 80a, is fluid-technically formed between the suction opening 34a and the drive unit 16a.
- the separating element 80a arranged in the vicinity 82a of the drive unit 16a is arranged, in particular fastened, directly on the drive unit 16a, in particular a housing of the drive unit 16a. It is conceivable that the separating element 80a arranged in the vicinity 82a of the drive unit 16a is formed in one piece with the drive unit 16a, in particular the housing of the drive unit 16a.
- a channel element 56a of the fluid cooling unit 30a is provided to the partial flow 26a, in particular separately from the other partial flow 28a, at least partially to lead past an outer wall 84a of the drive unit 16a.
- the fluid cooling unit 30a comprises a plurality of channel elements 56a, which are provided for conducting the partial flow 26a, with the channel elements 56a in particular being distributed around the longitudinal axis 12a around the drive unit 16a.
- the separation unit 22a and the fluid cooling unit 30a are designed in such a way that the partial flow 26a, in particular in an area along the drive unit 16a, is passed through the housing unit 14a at least for the most part separately from the other partial flow 28a.
- the fluid cooling unit 30a is provided to guide the other partial flow 28a for cooling the drive unit 16a into or through the drive unit 16a.
- the channel element 56a is arranged outside the drive unit 16a on the outer wall 84a of the drive unit 16a.
- the channel element 56a is arranged directly on the drive unit 16a, in particular the outer wall 84a of the drive unit 16a.
- the channel element 56a lies flat against the outer wall 84a of the drive unit 16a.
- the channel element 56a is provided to transfer heat from the drive unit 16a, in particular the outer wall 84a of the drive unit 16a, to the partial flow 26a, with the partial flow 26a in particular cooling the drive unit 16a.
- the channel element 56a extends along an entire length 86a of the drive unit 16a on the outer wall 84a of the drive unit 16a.
- the channel element 56a is formed at least for the most part from a thermally conductive material, which in particular has a thermal conductivity of in particular at least 10 W / (mK), preferably at least 40 W / (mK), preferably at least 100 W / (mK) and particularly preferably at least 200 W / (mK).
- the channel element 56a is formed at least essentially in a straight line, in particular along an entire length 88a of the outer wall 74a of the drive unit 16a.
- the channel element 56a is at least largely at least essentially parallel to the outer wall 84a of the drive unit 16a, in particular an outer surface of the outer wall 84a of the drive unit 16a, which faces the channel element 56a or at least partially rests on the channel element 56a.
- the separation unit 22a comprises a delivery unit 90a, which is at least partially arranged within the fluid cooling unit 30a and is provided to at least supply the partial flow 26a from or through the housing unit 14a promote.
- the delivery unit 90a is designed as a flow pump.
- the delivery unit 90a is provided to suck in the partial flow 26a via the fluid cooling unit 30a, in particular through the suction opening 34a.
- the conveying unit 90a is provided to convey the fluid flow 24a, in particular along the guide path 58a, through the separating unit 22a and in particular by means of a conveying speed and the separating element 80a, into the partial flows 26a, 28a, in particular the partial flow 26a and the other partial flow 28a, to share.
- the delivery unit 90a is provided to convey the partial flows 26a, 28a, in particular the partial flow 26a and the other partial flow 28a, in particular after cooling the drive unit 16a, through the outlet openings 42a, 44a, 46a from the machine tool 10a, in particular the housing unit 14a , to transport.
- the delivery unit 90a comprises a delivery element 92a, which is at least partially designed as an axial fan.
- the För derelement 92a is formed in one piece with a fan 94a of the drive unit 16a.
- the conveying element 92a is arranged fluidly behind the drive unit 16a, viewed from the intake opening 34a.
- the conveying unit 90a is provided to convey the partial flow 26a and the other partial flow 28a separately from one another through the housing unit 14a and / or the fluid cooling unit 30a.
- the delivery unit 90a in particular together with the fluid cooling unit 30a, is intended to deliver the partial flows 26a, 28a, in particular after the drive unit 16a, in different directions, which are directed radially outward from a drive axis 96a of the delivery element 92a.
- the conveying element 92a is arranged behind the drive unit 16a, in particular in terms of fluid technology, viewed from the intake opening 34a.
- the conveying element 92a is provided to convey the partial flow 26a, in particular in a vicinity of the conveying element 92a, in a direction that is at least essentially parallel to the drive axis 96a of the conveying element 92a.
- the conveying element 92a is provided to convey the other partial flow 28a, in particular in a close range of the conveying element 92a, in a direction that is at least substantially perpendicular to the drive axis 96a of the conveying element 92a.
- the conveying unit 90a is provided to convey the partial flow 26a and the other partial flow 28a respectively through differently designed and / or spaced-apart outlet openings 42a, 44a, 46a of the fluid cooling unit 30a from the machine tool 10a or the housing unit 14a.
- the Delivery unit 90a is provided to deliver the partial flow 26a through the outlet openings 42a, 44a, 46a.
- the delivery unit 90a is provided to deliver the other partial flow 28a through the outlet openings 42a, 44a,
- the fluid cooling unit 30a comprises a main channel element 98a for guiding the fluid flow 24a, which is arranged in front of the drive unit 16a when viewed from the intake opening 34a, in particular when viewed along the main extension direction 54a of the fluid cooling unit 30a.
- the fluid cooling unit 30a comprises, along the main direction of extent 54a of the fluid cooling unit 30a, in a region of the main channel element 98a, just one guide section 58a, which is arranged in particular within the main channel element 98a.
- the guide path 58a extends from the intake opening 34a through the fluid cooling unit 30a to the outlet openings 42a, 44a, 46a.
- the main direction of extent 54a of the fluid cooling unit 30a is at least substantially parallel to a main direction of extent 102a of the drive unit 16a and / or the housing unit 14a and to the drive axis 96a of the conveying element 92a.
- the main channel element 98a extends from the intake opening 34a, in particular along the main direction of extent of the fluid cooling unit 30a, to the separation unit 22a.
- the main channel element 98a is integrally connected to the fluid cooling element 66a.
- the main channel element 98a, the fluid cooling element 66a and the channel element 56a of the fluid cooling unit 30a each have at least essentially smooth inner walls 104a, which in particular delimit the fluid channels 72a that guide the fluid flow 24a.
- the main channel element 98a, the fluid cooling element 66a and the channel element 56a of the fluid cooling unit 30a, in particular the inner walls 104a of the main channel element 98a, the fluid cooling element 66a and the channel element 56a of the fluid cooling unit 30a, are preferably designed without edges, with the inner walls 104a of the Main channel element 98a, of the fluid cooling element 66a and of the channel element 56a of the fluid cooling unit 30a continuously merge into one another along a guide direction 106a of the fluid flow 24a.
- the machine tool 10a comprises a sensor unit 108a, which is only indicated in the figures.
- the sensor unit 108a comprises at least one sensor element 110a for detecting a temperature temperature of the drive unit 16a.
- the electronics unit 18a is preferably provided to prevent overheating of the drive unit 16a or failure of the machine tool 10a to control and / or regulate a performance parameter, for example a maximum speed, of the drive unit 16a as a function of the detected temperature , preferably to limit.
- the electronics unit 18a is provided to output a warning to a user, for example via an optical, acoustic and / or haptic signal, as a function of the detected temperature, in particular when a limit value for the temperature is exceeded.
- FIG. 2 shows a detailed view of the separating element 80a on one side of the longitudinal axis 12a of the machine tool 10a.
- the separation unit 22a is designed in such a way that a value of the foreign body density of the partial flow 26a is in particular at least 50%, preferably at least 70%, preferably at least 80% and particularly preferably at least 90% greater than a value of the foreign body density of the other partial flow 28a, wherein in particular the foreign bodies have a size, in particular a mean diameter, of at least 500 ⁇ m, preferably at least 100 ⁇ m and particularly preferably at least 20 ⁇ m.
- the separation unit 22a is provided to divide the fluid flow 24a into the partial flow 26a and the other partial flow 28a via a geometrical design of the guide path 58a of the, in particular sucked in, fluid flow 24a, whereby in particular the partial flow 26a in comparison to the other partial flow 28a a has a higher foreign body density.
- the separation unit 22a is provided to guide the partial flow 26a and the other partial flow 28a, in particular from the guide section 58a to the various partial guide sections 62a, 64a.
- the separating element 80a forms a fluid inlet 112a for guiding the fluid stream 24a and two fluid outlets 114a, 116a for guiding the partial stream 26a or the other partial stream 28a.
- the separating element 80a has an at least partially curved basic shape in a sectional plane comprising the guide path 58a and / or at least one of the partial guide paths 62a, 64a, which in particular corresponds to an image plane in FIG.
- the separation element 80a is designed in such a way that the guide path 58a has an angle 118a of in particular at least 30 °, preferably at least 60 ° and particularly preferably at least 80 ° in a region of the fluid inlet 114a to the partial guide path 64a of the other partial flow 28a.
- the separating element 80a has a basic shape which is designed in such a way that foreign bodies are directed onto a path that differs from the guide section 58a of the fluid flow 24a, in particular the sub-guide section 64a of the other substream 28a, in particular onto the sub-guide section 62a of the substream 26a.
- the separating element 80a is designed in such a way that the partial flow 26a is guided at least partially separately from the other partial flow 28a.
- the separating element 80a is arranged on the fluid cooling unit 30a or is designed as part of the fluid cooling unit 30a.
- the separating element 80a is formed in one piece with the fluid cooling unit 30a, in particular at least one duct element 56a of the fluid cooling unit 30a, which, however, is not shown in FIG.
- the separation unit 22a, in particular the separation element 80a is fluidly formed between the intake opening 34a and the drive unit 16a.
- Foreign bodies within the fluid flow 24a when flowing through the separating element 80a, are moved in a flow direction along the guide path 58a due to their inertia on a path which depends on a mass of the foreign bodies.
- Foreign objects with a larger mass preferably fly on a less curved path than foreign objects with a smaller mass.
- Foreign bodies with a large mass when flowing through the separating element 80a, are directed to a fluid outlet 116a of the fluid outlets 114a, 116a, which is provided for guiding the partial flow 26a.
- Another fluid outlet 114a of the fluid outlets 112a, 114a is provided to a line of the other partial flow 28a.
- the guide path 58a in the area of the fluid inlet 112a to the partial guide path 62a of the partial flow 26a in the area of the fluid outlet 116a has a smaller angle than to the partial guide path 64a of the other partial flow 28a in the area of the other fluid outlet 114a.
- the separating element 80a is preferably designed in such a way that a turbulence of the fluid or the fluid flow forms on an inner wall 122a of the separating element 80a which borders the partial guide section 62a of the partial flow 26a.
- FIG. 3 shows a perspective view of the conveying element 92a.
- the conveying element 92a of the conveying unit 90a is designed as a radial fan in at least one region 124a of the conveying element 92a.
- the conveying element 92a is designed as an axial fan in at least one further area 126a of the conveying element 92a.
- the area 124a of the conveying element 92a is enclosed by the further area 126a, viewed along the drive axis 96a of the conveying element 92a.
- the area 124a of the conveying element 92a has a smaller minimum radial distance 128a to the drive axis 96a of the conveying element 92a than the further area 126a of the conveying element 92a (see. Stand 129a).
- the conveying element 92a is designed as a two-part fan wheel.
- the region 124a of the conveying element 92a is provided for conveying the other partial flow 28a through the drive unit 16a.
- the further area 126a of the conveying element 92a is provided for conveying the partial flow 26a through the channel element 56a or along the outer wall 74a of the drive unit 16a.
- FIG. 4 shows a schematic cross section of the electronic device 17a in the near region 76a of the electronic unit 18a.
- the electronics unit 18a is arranged directly on the fluid cooling element 66a.
- the electronics unit 18a rests at least partially on the outer wall 74a of the fluid cooling element 66a.
- the fluid cooling element 66a delimits the fluid channel 72a to a line of the fluid, which has an at least substantially round cross-sectional area 130a.
- the cross-sectional area 130a of the fluid channel 72a is oriented at least substantially perpendicular to a central axis 132a of the fluid cooling element 66a.
- the cross-sectional area 130a of the fluid channel 72a is aligned at least substantially perpendicular to the support surface 70a and / or the outer wall 74a of the fluid cooling element 66a.
- the cross-sectional area 130a of the fluid channel 72a has a contour that is at least substantially circular.
- a maximum value of the cross-sectional area 130a of the fluid channel 72a delimited by the fluid cooling element 66a is preferably at least 100 mm 2 , preferably at least 200 mm 2 , preferably at least 400 mm 2 and particularly preferably at least 600 mm 2 .
- the fluid cooling element 66a has at least one contact surface 134a on the outer wall 74a of the fluid cooling element 66a, which at least substantially corresponds to the contact surface.
- the contact surface 70a corresponds to the electronic unit 18a, the electronic unit 18a resting on the contact surface 134a of the fluid cooling element 66a via the contact surface 70a.
- the contact surface 134a and the contact surface 70a are designed as flat surfaces. However, it is also conceivable that the contact surface 134a and the contact surface 70a are designed as at least partially curved surfaces.
- the electronics unit 18a in particular an electronic component 136a of the electronics unit 18a, is fastened, for example glued and / or screwed, to the fluid cooling element 66a, in particular the contact surface 134a, via the support surface 70a.
- the contact surface 134a and the contact surface 70a have a maximum area of at least 100 mm 2 , preferably at least 200 mm 2 , preferably at least 400 mm 2 and particularly preferably at least 600 mm 2 .
- the contact surface 134a and / or the contact surface 70a preferably have / has a maximum area of at most 5000 mm 2 , preferably at most 3000 mm 2 and particularly preferably at most 2000 mm 2 .
- the bearing surface 70a is completely arranged on the heat diffusion element 68a.
- the fluid cooling element 66a has a hexagonal basic shape 138a, the contact surface 134a being designed as one side of the basic shape 138a.
- the heat diffusion element 68a is arranged on the electronic component 136a of the electronic unit 18a and is provided to dissipate heat generated by the electronic component 136a to the fluid cooling element 66a.
- the electronic component 136a is designed as a power semiconductor such as an IGBT or a MOSFET. It is also conceivable that, as an alternative or in addition, a processor unit, a memory unit or the like for cooling is / is arranged on the heat diffusion element 68a.
- the electronic component 136a is attached to the circuit board 20a of the electronic unit 18a. Other configurations of the electronics unit 18a, in particular of the heat diffusion element 68a, are also conceivable.
- the electronics device 17a comprises a sealing unit 140a, which is intended to close the electronics unit 18a together with the fluid cooling unit 30a at least partially, in particular with respect to the fluid flow path 32a, at least essentially airtight and / or watertight.
- the sealing unit 140a has a sealing element 142a which is formed from a heat-insulating material, in particular rubber.
- the sealing element 142a is at least partially on the heat diffusion element 68a. It is also conceivable that the sealing element 142a completely surrounds the heat diffusion element 68a together with the fluid cooling element 66a.
- the sealing element 142a is formed from a thermally conductive material, which in particular has a thermal conductivity of at least 10 W / (mK), preferably at least 50 W / (mK), preferably at least 100 W / (mK), especially preferably at least 200 W / (mK) and very particularly preferably at least 400 W / (mK).
- the sealing element 142a encloses the electronic component 136a of the electronics unit 18a together with the fluid cooling element 66a and the heat diffusion element 68a at least substantially completely.
- a volume enclosed between the sealing element 142a and the electronics unit 18a or the fluid cooling element 66a and / or the heat diffusion element 68a is filled with a heat-insulating gas or evacuated.
- the evacuated volume has a maximum pressure of in particular less than 1000 mbar, preferably less than 300 mbar, preferably less than 1 mbar and particularly preferably less than 10 2 mbar.
- FIG. 5 shows an exemplary sequence of a method 200a for cooling the drive unit 16a or the electronics unit 18a of the machine tool 10a.
- a method step 202a of method 200a the fluid flow 24a is sucked through the suction opening 34a by means of the delivery unit 90a.
- the electronic unit 18a is cooled by means of the fluid flow 24a flowing through the main channel element 98a via the fluid cooling element 66a.
- the fluid stream 24a flows through the fluid cooling element 66a, with heat being released from the electronics unit 18a via the fluid cooling element 66a to the fluid stream 24a for cooling the electronics unit 18a.
- step 206a of method 200a by means of separating unit 22a, in particular separating element 80a, fluid flow 24a is divided into partial flow 26a, in particular contaminated with foreign bodies, and the other partial flow 28a, in particular low in foreign bodies.
- the partial flow 26a is conducted by means of the separation unit 22a and the fluid cooling unit 30a through the channel element 56a along the outer wall 84a of the drive unit 16a, with the drive unit 16a passing over the partial flow 26a is cooled, in particular heat is transferred from the outer wall 84a of the drive unit 16a to the partial flow 26a.
- the other partial flow 28a is conducted into or through the drive unit 16a by means of the separation unit 22a and the fluid cooling unit 30a, the drive unit 16a, in particular windings of the drive unit 16a, being cooled by means of the other partial flow 28a, in particular with heat from the drive unit 16a the other substream 28a is transmitted.
- the other partial flow 28a is conveyed via area 124a of conveying element 92a in a direction facing processing area 38a or outlet opening 46a and through outlet opening 46a out of machine tool 10a, in particular housing unit 14a and / or the fluid cooling unit 30a, geför changed.
- the partial flow 26a is conveyed via the further area 126a of the conveying element 92a in directions at least substantially parallel to the drive axis 96a of the conveying element 92a and via the fluid cooling unit 30a to the outlet openings 42a, 44a or from the machine tool 10a, in particular the housing unit 14a and / or the fluid cooling unit 30a.
- FIGS. Further exemplary embodiments of the invention are shown in FIGS.
- the following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, whereby with regard to identically labeled components, in particular with regard to components with the same reference symbols, in principle also to the drawings and / or the description of the other exemplary embodiments, in particular FIGS to 5, can be referenced.
- the letter a is placed after the reference numerals of the exemplary embodiment in FIGS. 1 to 5.
- the letter a is replaced by the letters b to g.
- FIG. 6 shows an alternative embodiment of a separation unit 22b, in particular a separation element 80b, or a conveyor unit 90b of a machine tool 10b.
- the machine tool 10b has a housing unit 14b, an attachment arranged within the housing unit 14b Drive unit 16b, which is not shown in particular in Figure 6, and the separation unit 22b, the separation unit 22b being provided to at least one fluid flow 24b conducted through the housing unit 14b, in particular depending on a foreign body density, in at least two partial flows 26b, 28b, a partial flow 26b of the partial flows 26b, 28b having a higher foreign body density compared to another partial flow 28b of the partial flows 26b, 28b.
- the machine tool 10b has a fluid cooling unit 30b, which is provided to cool the drive unit 16b by means of the at least two partial flows 26b, 28b.
- the machine tool 10b shown in FIG. 6 has an at least substantially analogous configuration to the machine tool 10a described in the description of FIGS. 1 to 5, so that with regard to one configuration of the machine tool 10b shown in FIG Be description of Figures 1 to 5 can be referenced.
- the separating unit 22b and / or the conveying unit 90b of the machine tool 10b shown in FIG. 6 preferably has a further conveying element 144b.
- the further conveying element 144b is arranged at a fluid outlet 114b of the separating element 80b, which is provided to a line of the fluid flow 24b.
- the further conveying element 144b is designed as a fan.
- the further conveying element 144b is provided to convey the partial flow 26b into a channel element 56b of the fluid cooling unit 30b, which is arranged along an outer wall 84b of the drive unit 16b, which in particular is not shown in FIG To cool drive unit 16b via the partial flow 26b.
- the further conveying element 144b is provided to draw foreign bodies in the fluid flow 24b into the partial flow 26b, wherein in particular a foreign body density of the partial flow 26b is increased and a foreign body density of the other partial flow 28b is reduced.
- the further conveying element 144b is arranged, in particular in terms of fluid technology, between the intake opening 34b of the fluid cooling unit 30b and the drive unit 16b.
- the further conveying element 144b is at least for the most part within the fluid cooling unit 30b, in particular the channel element 56b, is arranged.
- the further conveying element 144b is arranged, in particular in terms of fluid technology, between the separating unit 22b and the drive unit 22b or outlet openings 42b, 44b, 46b of the fluid cooling unit 30b. It is it is also conceivable that the further conveying element 144b is arranged between a suction opening 36b of the fluid cooling unit 30b and the separating element 80b.
- the further conveying element 144b is provided to convey the partial flow 26b and / or the other partial flow 28b through the fluid cooling unit 30b, through the separation unit 22b and / or out of the machine tool 10b or the housing unit 14b. After flowing through or past the drive unit 16b, the partial flow 26b and the other partial flow 28b are guided out of the machine tool 10b through a plurality of outlet openings 42b, 44b, 46b. In particular, the partial flow 26b and the other partial flow 28b are combined within the machine tool 10b, in particular the housing unit 14b, after flowing through or past the drive unit 16b in a channel element of the fluid cooling unit 30b. However, it is also conceivable that the fluid cooling unit 30b is designed in such a way that the partial flow 26b and the other partial flow 28b are guided separately from the machine tool 10b.
- FIG. 7 an alternative embodiment of a machine tool 10c is shown, in particular in a representation designed analogously to FIG.
- the machine tool 10c has an electronic device 17c, a housing unit 14c, a drive unit 16c arranged within the housing unit 14c, and a separation unit 22c, the separation unit 22c being provided for at least one fluid flow 24c conducted through the housing unit 14c, in particular as a function of a foreign body density, to be divided into at least two partial flows 26c, 28c, wherein a partial flow 26c of the partial flows 26c, 28c compared to another partial flow 28c of the partial flows 26c, 28c has a higher foreign body density.
- the machine tool 10c or the electronic device 17c has / has a fluid cooling unit 30c, which is provided to cool the drive unit 16c by means of the at least two partial flows 26c, 28c.
- the machine tool 10c or the electronic device 17c comprise / comprises an electronics unit 18c, the fluid cooling unit 30c being provided to cool the electronics unit 18c by means of a fluid or the fluid flow 24c.
- the electronics unit 18c is at least for the most part, in particular completely, arranged outside a fluid flow path 32c of the fluid cooling unit 30c.
- the work The machine tool 10c, in particular the separation unit 22c has a conveyor unit 90c for conveying the fluid through the fluid cooling unit 30c.
- the separation unit 22c of the machine tool 10c shown in FIG. 7 preferably has a further separation element 93c, which is arranged within a main channel element 98c of the fluid cooling unit 30c and is provided for this purpose to guide the fluid flow 24c to a part of the partial flows 26c, 28c viewed along the main channel element 98c on a circular path 174c.
- the further separating element 93c is designed as a helical shaped part.
- the further separating element 93c delimits, in particular within and / or together with the main channel element 98c, a fluid guide channel which extends from the intake opening 34c in the direction of the drive unit 16c along a curve which runs with a constant slope around a lateral surface of an imaginary cylinder.
- the curve forms the circular path 174c in a projection plane.
- the conveyor unit 90c of the machine tool 10c comprises a conveyor element 92c, which is formed in one piece with a fan of the drive unit 16c.
- the conveying element 92c viewed from a suction opening 34c of the fluid cooling unit 30c, is arranged behind the main channel element 98c, the further separating element 93c and the drive unit 16c.
- the conveying element 92c is provided to suck the fluid flow 24c through the suction opening 34c into the machine tool 10c, in particular the fluid cooling unit 30c.
- the conveying element 92c is provided to convey the fluid flow 24c through the main channel element 98c and a fluid channel delimited by the main channel element 98c and the further separating element 93c and in particular to convey the partial flow 26c through the channel element 56c after the separating unit 22c.
- a separating element 80c of separating unit 22c and the fluid cooling unit 30c are designed such that partial flow 26c and the other partial flow 28c are conducted separately from one another after exiting from further separating element 93c.
- the separation element 80c is as a Funnel formed, wherein in particular the other partial flow 28c is guided along a central axis 146c of the separating element 80c, which is arranged in particular coaxially to a central axis of the further separating element 93c and the main channel element 98c, and the partial flow 28c is guided along an outer wall 148c of the separating element 80c becomes.
- the separating element 80c is at least partially conical.
- the separating element 80c delimits at least one passage 150c around the central axis 146c, which is in particular provided for a line of the other substream 28c, in particular through or into the drive unit 16c.
- the conveying element 92c is intended to divide the fluid flow 24c together with a separating element 80c of the separating unit 22c into the partial flows 26c, 28c, the partial flow 26c in particular having a greater radial distance from the central axis of the further separating element 93c and the main channel element 98c than the other substream 28c.
- the further separation element 93c viewed along its central axis, is at least largely enclosed by the main channel element 98c.
- the further separating element 98c is intended, in particular for cooling the electronics unit 18c, to compress the fluid on an inner wall 152c of the fluid cooling element 66c or the main channel element 98c that delimits a fluid channel 72c.
- the further separation element 98c is provided to increase a flow duration of the fluid or the fluid flow 24c through the fluid cooling element 66c or the main channel element 98c, in particular in comparison to an embodiment in which the fluid cooling element 66c or the main channel element 98c is hollow, in particular without the further separation element 93c.
- the separation unit 22c or the fluid cooling unit 30c comprise a filter element 154c, which is provided to change the foreign body density of the fluid flow 24c, in particular to reduce it.
- the filter element 154c is arranged, in particular directly, on the intake opening 34c of the fluid cooling unit 30c.
- the filter element 154c in particular a filter surface 156c of the filter element 154c, is arranged at least partially transversely to a main extension direction 54c of the fluid cooling unit 30c.
- the filter surface 156c spans with the main direction of extent 54c of the fluid cooling unit 30c in a region of the filter element 154c or the intake opening 34c has an angle 158c which has a value from a value range of in particular 8 ° to 82 °, preferably 10 ° to 50 ° and particularly preferably 15 ° to 30 °.
- the angle 158c spanned by the filter surface 156c and the main direction of extent 54c of the fluid cooling unit 30c is preferably at least substantially 18 °.
- the filter element 154c is at least largely conical.
- the design of the filter element 154c can preferably achieve a low flow resistance of the filter element 154c in the fluid flow 24c.
- the fluid stream 24c is conveyed out of the machine tool 10c via a plurality of outlet openings 42c, 44c, 46c by means of the conveying element 92c.
- the filter element 154c is arranged on the separating element 80c and is provided for filtering, in particular reducing a foreign body density, of the other partial flow 28c before it enters the drive unit 16c.
- the partial flow 26c and the other partial flow 28c are merged within the machine tool 10c, in particular the housing unit 14c, after flowing through or past the drive unit 16c in a further channel element 160c of the fluid cooling unit 30c.
- the fluid cooling unit 30c is designed in such a way that the partial flow 26c and the other partial flow 28c are guided separately from the machine tool 10c.
- the conveying unit 90c has a further conveying element designed as a spiral wheel, which is not shown in particular in FIG. 7, or that the further separating element 93c is designed to be movable by means of a drive element of the drive unit 16c, in particular about its central axis.
- the drive element is provided to drive the further separating element 93c and thereby to promote the fluid flow 24c through the fluid cooling unit 30c, in particular the main channel element 98c.
- FIG. 8 shows an alternative embodiment of a machine tool 10D, in particular in a representation designed analogously to FIG.
- the machine tool lOd has an electronic device 17d, a housing called 14d and a drive unit 16d arranged within the housing unit 14d.
- the machine tool 10d or the electronic device 17d has a fluid cooling unit 30d which is provided to cool the drive unit 16d by means of the at least two partial flows 26d, 28d.
- the machine tool 10d or the electronic device 17d comprises an electronic unit 18d, the fluid cooling unit 30d being provided to cool the electronic unit 18d by means of a fluid or the fluid flow 24d.
- the electronics unit 18d is at least for the most part, in particular completely, arranged outside a fluid flow path 32d of the fluid cooling unit 30d.
- the machine tool 10d shown in FIG. 8 has an at least substantially analogous configuration to the machine tool 10a described in the description of FIGS. 1 to 5, so that with regard to a configuration of the machine tool 10d shown in FIG Figures 1 to 5 can be referred to.
- the machine tool 10d shown in FIG. 8 preferably does not have a separation unit.
- the fluid cooling unit 30d is provided to cool the electronics unit 18d and the drive unit 16d by means of the fluid flow 24d drawn in, the drive unit 16d in particular being carried out by guiding the fluid flow 24d along an outer wall 84d of the drive unit 16d.
- the fluid cooling unit 30d comprises a channel element 56d which guides the fluid flow 24d directly to and at least substantially parallel to the outer wall 84d of the drive unit 16d.
- the fluid flow 24d is conveyed through the machine tool 10d via a conveying unit 90d.
- the conveying unit 90d comprises a conveying element 92d which, in particular in terms of fluid technology, is arranged behind the drive unit 16d when viewed from the intake opening 34d.
- the fluid cooling unit 30d comprises a fluid cooling element 66d, which is provided to lead away heat from the electronics unit 18d to the fluid flow 24d.
- the fluid cooling element 66d is formed in one piece with a main channel element 98d of the fluid cooling unit 30d, in particular a whole fluid flow 24d drawn in through the main channel element 98d and the fluid cooling element 66d in a vicinity 76d of the electronics unit 18d.
- the fluid cooling unit 30d comprises a deflection element 162d, which in particular is at least substantially conical.
- the Um- Steering element 162d is streamlined.
- the deflection element 162d is provided to guide the fluid flow 24d from the main channel element 98d into the channel element 56d, in particular the fluid flow 24d being guided radially outward from a central axis 146d of the main channel element 98d.
- FIG. 9 shows an alternative embodiment of a fluid cooling element 66e of a fluid cooling unit 30e of a machine tool 10e or an electronic device 17e.
- the machine tool 10e or electronic device 17e shown in FIG. 9 has an embodiment that is at least essentially analogous to the machine tool 10a or electronic device 17a described in the description of FIGS Machine tool 10e or electronic device 17e can at least essentially be referred to the description of FIGS. 1 to 5.
- the fluid cooling element 66e of the fluid cooling unit 30e of the machine tool 10e or electronic device 17e shown in FIG. 9 preferably delimits a fluid channel 72e which has an angular cross-sectional surface 130e.
- the cross-sectional area 130e of the fluid channel 72e delimited by the fluid cooling element 66e is hexagonal.
- a minimum wall thickness 164e of the fluid cooling element 66e is in particular at least 0.5 mm, preferably at least 1 mm, preferably at least 1.5 mm and particularly preferably at least 2 mm, and / or in particular at most 10 mm, preferably at most 6 mm and preferably at most 4 mm.
- a maximum value of the cross-sectional area 130e of the fluid channel 72e delimited by the fluid cooling element 66e is preferably at least 100 mm 2 , preferably at least 200 mm 2 , preferably at least 400 mm 2 and particularly preferably at least 600 mm 2 .
- an electronics unit 18e of the machine tool 10e is designed without a sealing unit.
- other configurations of the fluid cooling unit 30e and / or the electronics unit 18e are also conceivable.
- FIG. 10 Another alternative embodiment of a machine tool lOf or an electronic device 17f is shown in FIG.
- Machine machine lOf is shown in a longitudinal section analogous to Figure 1.
- the machine tool lOf shown in FIG. 10 has an at least substantially analogous design to the machine tool lOd described in the description of FIG. 8, so that with regard to an embodiment of the machine tool lOf shown in FIG Figure 8 can be referenced.
- a housing unit 14f of the machine tool lOf shown in FIG. 10 limits more than one intake opening 34f, 36f for sucking in a fluid or a fluid flow 24f for cooling an electronic unit 18f and a drive unit 16f by means of a fluid cooling unit 30f.
- the intake openings 34f, 36f are provided to guide fluid or the fluid flow 24f into a main channel element 98f of the fluid cooling unit 30f.
- the housing unit 14f and / or the fluid cooling unit 30f delimit ten intake openings 34f, 36f, with four intake openings 34f of the ten intake openings 34f, 36f on an at least substantially perpendicular to a central axis 166f of the main channel element 98f or to a longitudinal axis 12f of the machine tool lOf aligned outer wall 168f of the machine tool lOf, in particular of the housing unit 14f, are arranged.
- three intake openings 36f of the ten intake openings 34f, 36f are arranged on mutually facing outer walls 170f of the machine tool lOf, in particular the housing unit 14f, which in particular are at least essentially parallel to the central axis 166f of the main channel element 98f or to the longitudinal axis 12f of the machine tool lOf are aligned.
- the ten suction openings 34f, 36f are provided to receive the fluid or the fluid flow 24f on a side of the machine tool lOf facing away from a machining area 38f of the machine tool lOf and, in particular before it flows through a fluid cooling element 66f of the fluid cooling unit 30f, in the main channel element 98f to bundle.
- FIG. 11 Another alternative embodiment of a machine tool 10g or an electronic device 17g is shown in FIG. 11, the machine tool 10g being shown in a longitudinal section analogously to FIG.
- the machine tool 10g shown in FIG. 11 has an at least essentially analogous configuration to the machine tool 10d described in the description of FIG.
- a housing unit 14g of the machine tool 10g shown in FIG. 11 limits more than one intake opening 36g for sucking in a fluid or a fluid stream 24g for cooling an electronic unit 18g and a drive unit 16g by means of a fluid cooling unit 30g.
- the inlet openings 36g are provided to guide fluid or the fluid flow 24g into a main channel element 98g of the fluid cooling unit 30g.
- the housing unit 14g and / or the fluid cooling unit 30g delimit six intake openings 36g, three intake openings 36g of the six intake openings 36g being arranged on opposite outer walls 170g of the machine tool 10g, in particular the housing unit 14g, which in particular are at least substantially parallel to a center Axis 166g of the main channel element 98g or a longitudinal axis 12g of the machine tool 10g are aligned.
- the six intake openings 36g are provided to receive the fluid or the fluid flow 24g on a side of the machine tool 10g facing away from a machining area 38g of the machine tool 10g and to bundle it in the main channel element 98g, in particular before it flows through a fluid cooling element 66g of the fluid cooling unit 30g.
- the machine tool 10g is designed as a battery-operated machine tool.
- a battery pack 172g is attached to an outer wall 168g of the machine tool 10g, in particular the housing unit 14g, which is at least substantially perpendicular to the central axis 166g of the main channel element 98g or to the longitudinal axis 12g of the machine tool 10g.
- the intake openings 36g are oriented away from the battery pack 172g.
- other configurations of the housing unit 14g and / or the fluid cooling unit 30g are also conceivable. bar, in particular with a number of intake openings other than six, 36g.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE102019220623 | 2019-12-30 | ||
DE102020214817.1A DE102020214817A1 (de) | 2019-12-30 | 2020-11-25 | Werkzeugmaschine und Verfahren zu einem Kühlen einer Antriebseinheit der Werkzeugmaschine |
PCT/EP2020/083457 WO2021136620A1 (de) | 2019-12-30 | 2020-11-26 | Werkzeugmaschine und verfahren zu einem kühlen einer antriebseinheit der werkzeugmaschine |
Publications (1)
Publication Number | Publication Date |
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EP4084934A1 true EP4084934A1 (de) | 2022-11-09 |
Family
ID=76310396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20816145.5A Pending EP4084934A1 (de) | 2019-12-30 | 2020-11-26 | Werkzeugmaschine und verfahren zu einem kühlen einer antriebseinheit der werkzeugmaschine |
Country Status (5)
Country | Link |
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US (1) | US20230001561A1 (de) |
EP (1) | EP4084934A1 (de) |
CN (1) | CN114901434A (de) |
DE (1) | DE102020214817A1 (de) |
WO (1) | WO2021136620A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20220297255A1 (en) * | 2021-03-18 | 2022-09-22 | X'pole Precision Tools Inc. | Air guider |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5849066A (ja) * | 1981-09-17 | 1983-03-23 | Toshiba Corp | 回転電機の通風ろか装置 |
JP2005246542A (ja) * | 2004-03-04 | 2005-09-15 | Hitachi Koki Co Ltd | 電動工具 |
DE102007017243A1 (de) * | 2007-04-12 | 2008-10-16 | Robert Bosch Gmbh | Werkzeugmaschine, insbesondere Handwerkzeugmaschine |
DE102008041370A1 (de) * | 2008-08-20 | 2010-02-25 | Robert Bosch Gmbh | Elektrowerkzeug |
US8348727B2 (en) * | 2011-05-26 | 2013-01-08 | Black & Decker Inc. | Airflow arrangement for a power tool |
DE102012103603A1 (de) * | 2012-04-24 | 2013-10-24 | C. & E. Fein Gmbh | Handführbare Werkzeugmaschine mit Lüftereinrichtung |
JP5836876B2 (ja) * | 2012-04-25 | 2015-12-24 | 株式会社マキタ | 電動工具 |
WO2016002542A1 (ja) * | 2014-06-30 | 2016-01-07 | 日立工機株式会社 | 電動工具 |
CN108436848B (zh) * | 2017-02-16 | 2024-02-27 | 博世电动工具(中国)有限公司 | 空气预清洁组件及具有其的电动工具 |
DE102018107808A1 (de) * | 2018-04-03 | 2019-10-10 | C. & E. Fein Gmbh | Handwerkzeugmaschine |
-
2020
- 2020-11-25 DE DE102020214817.1A patent/DE102020214817A1/de active Pending
- 2020-11-26 WO PCT/EP2020/083457 patent/WO2021136620A1/de unknown
- 2020-11-26 EP EP20816145.5A patent/EP4084934A1/de active Pending
- 2020-11-26 CN CN202080091389.9A patent/CN114901434A/zh active Pending
- 2020-11-26 US US17/785,363 patent/US20230001561A1/en active Pending
Also Published As
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WO2021136620A1 (de) | 2021-07-08 |
US20230001561A1 (en) | 2023-01-05 |
DE102020214817A1 (de) | 2021-07-01 |
CN114901434A (zh) | 2022-08-12 |
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