EP2326465A1 - Outil électrique - Google Patents

Outil électrique

Info

Publication number
EP2326465A1
EP2326465A1 EP09780000A EP09780000A EP2326465A1 EP 2326465 A1 EP2326465 A1 EP 2326465A1 EP 09780000 A EP09780000 A EP 09780000A EP 09780000 A EP09780000 A EP 09780000A EP 2326465 A1 EP2326465 A1 EP 2326465A1
Authority
EP
European Patent Office
Prior art keywords
unit
deflection
air flow
power tool
cooling air
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.)
Granted
Application number
EP09780000A
Other languages
German (de)
English (en)
Other versions
EP2326465B1 (fr
Inventor
Manfred Schuele
Bernd Altvater
Florian Esenwein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2326465A1 publication Critical patent/EP2326465A1/fr
Application granted granted Critical
Publication of EP2326465B1 publication Critical patent/EP2326465B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Definitions

  • the invention relates to a power tool according to the preamble of claim 1.
  • a power tool with a machine housing and a ventilation unit, which is provided for cooling a motor unit and / or electronics unit enclosed by the machine housing by suction of a cooling air flow, is already known, wherein the ventilation unit has a deflection unit.
  • the invention relates to a power tool with a machine housing and a ventilation unit, which is provided for cooling a motor unit and / or electronics unit enclosed by the machine housing and which has a deflection unit.
  • the deflection unit has at least one deflection channel, which is provided by means of a deflection of the cooling air flow to a separation of dirt particles and air of the cooling air flow.
  • the term "provided” should be understood to mean in particular specially equipped and / or specially designed
  • the ventilation unit preferably has a fan for sucking in the cooling air flow or generating a suction force during operation of the power tool in particular a unit which is preferably located in the area and / or within a ventilation Channel of the ventilation unit is arranged and in particular due to the deflection of the cooling air flow to a separation, in particular a mass-dependent separation between dust and / or dirt particles and air, especially gaseous particles and / or molecules of the air leads.
  • a “deflection channel” is to be understood as meaning, in particular, a channel which is provided for targeted guidance of the cooling air flow and deflects the cooling air flow in an intended direction, so that a scattering of particles of the cooling air flow, in particular into a region surrounding the channel along its longitudinal extent , can be advantageously prevented.
  • the deflection channel is shielded by a separate channel housing of other components and / or areas of the electrical device.
  • a force in particular a centrifugal force and / or a gravitational force, etc. on the
  • the cooling air flow is composed of air and by a suction force of the ventilation unit in the air entrained dust and / or dirt particles.
  • the inventive design advantageously dust and / or dirt particles are separated from air in the cooling air flow, so that a nearly dust-free and / or dirt-free cooling air for cooling the motor unit and / or the electronic unit is available during operation of the power tool.
  • an undesirable emission of components and / or elements of the motor unit and / or the electronics unit can advantageously be reduced or prevented, and thus advantageously extends a service life of the motor unit and / or the electronics unit or a failure of the components and / or the power tool can be prevented.
  • additional components such as a dust and / or dirt filter, and thus a maintenance of the ventilation unit can be minimized.
  • the deflection channel has at least one curved deflection channel section.
  • the term "bent” is to be understood in particular to mean that the deflection channel has a curved deflection channel section, preferably with a continuous change in direction. tively easy to act in the Umlenkkanalabintroductory guided particles of the cooling air flow and thereby a mass-dependent, spatial separation of the particles, in particular a separation of the dust and / or dirt particles from the air, can be achieved, the heavy dust and / or dirt particles in an outer Area of the curved deflection channel section. can be steered and the air in an inner region can flow through the Umlenkkanalabimposing.
  • the deflection channel has at least one spiral deflection channel section, as a result of which a particularly space-saving and compact deflection unit can be achieved.
  • a particularly effective separation of heavy and light particles of the cooling air flow can be achieved by a radius of the spiral Umlenkkanalabitess preferably decreases along the flow direction and thus a centrifugal force acting on the particles can be advantageously increased.
  • the deflection channel can also be conically tapered along the direction of flow and / or be helical and / or have further forms that appear appropriate to the person skilled in the art.
  • the deflection channel has a plurality of Umlenkkanalabimposingen, wherein in at least one Umlenkkanalabimposing the cooling air flow has a direction of movement, which is directed substantially opposite to a direction of movement of adjacent Umlenkkanalaboughen.
  • a “multiplicity” should be understood to mean, in particular, a number of at least two or more than two.
  • substantially oppositely directed should be understood to mean that one direction is at an angle to a reference direction of 180 ° with a deviation of ⁇ 20 °, advantageously with a maximum deviation of ⁇ 8 ° and particularly preferably with a maximum deviation of
  • At least one deflection channel section has a flow direction oriented counter to gravity, a structurally simple, in particular mass-dependent, separation of the heavy particles from the cooling air flow can be achieved, and this can be particularly advantageous in particular with stationary power tools.
  • a "chamber” should be understood to mean in particular a closed space with a housing, wherein the closed space preferably through the housing, in particular of a separate, separate from another Components and / or elements of the power tool is formed, is separated from other components and / or areas of the power tool.
  • the deflection unit has at least one feed channel, which is designed as a dip tube.
  • a supply channel is to be understood as meaning, in particular, a channel which is provided for selectively guiding the cooling air flow cleaned of dirt particles during operation of the power tool in the direction of the motor unit and / or the electronic unit and which additionally supplies the cleaned cooling air flow of further components and / or areas of the power tool shields.
  • a "dip tube” is to be understood as meaning in particular a tube and / or a channel which extends at least partially into the deflection unit, in particular into a separation space or a deflection region of the deflection unit achieved by a dirt particles purified cooling air flow and a particularly space-saving design of the deflection can be achieved.
  • a rotation of the cooling air flow, in particular around the dip tube be increased while an effect of centrifugal force for the separation of massive particles and low-mass particles in the cooling air flow can be improved if the deflection channel is arranged in a circumferential direction at least partially around the dip tube.
  • the ventilation unit has at least one intake passage and at least one feed passage and a flow direction of the cooling air flow in the intake passage is substantially opposite to a flow direction of the cooling air flow of the feed passage.
  • the deflecting unit has at least one outlet opening in at least one deflection area, which is provided for escape of the dirt particles of the cooling air flow, whereby an effective separation of the heavy dust and / or dirt particles from the cooling air flow in the separation area or In the deflection region of air can be achieved.
  • the deflection unit has, in addition to the outlet opening, an additional main outlet opening, which is provided for outflow of the purified cooling air flow.
  • the outlet opening is arranged on an outer wall of a curved Umlenkkanalab hurdles the Umlenkkanals, whereby a structurally simple deposition of heavy dust and / or dirt particles due to the force acting on the dust and / or dirt particles centrifugal force can be achieved.
  • an "outlet channel” should be understood to mean, in particular, a channel for discharging, in particular, dust and / or dirt particles of the cooling air flow, the channel preferably having a housing formed separately from an inner wall of a machine housing which seals the dust and / or dust Dirt particles in front of other components of the power tool, such as in particular a motor unit, etc.
  • the outlet channel may also open into a collecting container for dust and / or dirt and / or particularly advantageous via an opening of the outlet channel, which is arranged in the machine housing,
  • a valve with a passage direction which allows the heavy dust and / or dirt particles to be blown out, can be arranged in the outlet channel, so that an undesired suction of an air flow through the outlet channel can be advantageously prevented.
  • the invention is based on a filter device for a power tool with at least one filter unit, which has at least one filter element.
  • the filter unit has a dedusting unit which is provided for dedusting the filter element.
  • a "filter element” should be understood to mean, in particular, an element which is provided for depositing dust particles and / or machining residues, in particular from a cooling air flow due to a larger volume of the dust particles and / or the processing residues than a volume of air
  • the configuration according to the invention advantageously enables a high cooling capacity of the filter device to be maintained and, in addition, sealing of filter pores of the filter element can be at least reduced and / or prevented a cost-reduced use with low maintenance of the filter device can be achieved by a frequency of Auswechseins the filter element can be reduced.
  • the dedusting unit has at least one dedusting element which abuts against the filter element in at least one operating position, whereby a particularly compact arrangement of the dedusting unit within the filter device can be achieved in a structurally simple manner.
  • the dedusting element can be coupled to a switch-on element of the electric tool, so that the filter element is dedusted when the electric tool is switched on and / or switched off, and / or the dedusting element can be provided with a separate actuating element which directly adjoins the filter unit is arranged.
  • the dedusting unit has at least one spring element which is provided for dedusting movement of the dedusting element, this can be done by means of a simple movement of the dedusting element in only one direction, such as by pressing, pulling, etc. by an operator, a dedusting movement due to a spring force of the Spring element can be achieved structurally simple in an opposite direction.
  • the spring element can be formed by any spring element that appears appropriate to the person skilled in the art. However, the spring element is particularly advantageously formed by a helical spring.
  • FIG. 1 is a sectional view of a power tool with a ventilation unit and a dirt separator unit
  • FIG. 3 shows the power tool with an alternative embodiment of a centrifugal separator in the form of a U-shaped deflection unit in a schematic sectional view
  • FIG. 6 shows the power tool with an alternative embodiment of a centrifugal separator in the form of a cyclone separator in a schematic sectional view
  • FIG. 7 shows a dirt separator unit formed by a gravitational separator in a schematic representation
  • FIG. 8 shows a filter device for the electric tool with a filter element and a dedusting element in a schematic representation
  • FIG. 9 shows a schematic partial view of the filter device from FIG. 8 with a
  • Fig. 10 is a schematic partial view of the filter device of Figure 8 with the
  • FIG. 1 shows a schematic view of a power tool 10a formed by an angle grinder.
  • the power tool 10 a has a machine housing 12 a, which comprises a gear housing 80 a and a motor housing 82 a, wherein the gear housing 80 a and the
  • Motor housing 82 a along a main extension direction 84 a of the power tool 10 a are arranged one after the other.
  • the power tool 10a has a motor unit 16a and an electronics unit 18a, which are enclosed by the machine housing 12a and the motor housing 82a, respectively.
  • the power tool 10a has a ventilation unit 14a, which is provided for sucking in a cooling air flow 20a.
  • the ventilation unit 14a is arranged in a region of the power tool 10a enclosed by the motor housing 82a.
  • the power tool 10a or the motor housing 82a has suction openings 86a, through which air is sucked during operation of the ventilation unit 14a, and outlet openings, not shown, through which the air is blown out after a cooling process.
  • the ventilation unit 14a comprises a fan wheel 88a and a dirt separator unit 90a.
  • the fan 88a is provided to generate a suction force in the operation of the power tool 10a, and sucks the cooling air flow 20a through the suction ports 86a.
  • the fan 88a is for this purpose arranged on a motor shaft 92a of the motor unit 16a and connected in rotation therewith.
  • the dirt separator unit 90a is arranged in front of the motor unit 16a and the electronic unit 18a and these are arranged in front of the fan wheel 88a.
  • the suction openings 86a are arranged in front of the dirt separator unit 90a.
  • the dirt separator unit 90a is shown in more detail in FIG. 2 and is formed by a helical centrifugal separator 94a. Furthermore, the dirt separator unit 90a has a deflection unit 22a, which is provided for deflecting the cooling air flow 20a, which leads to a mass-dependent separation of heavy dust and / or dirt particles 26a and air 28a.
  • the deflection unit 22a has a deflection channel 24a, a suction region 96a and a feed channel 44a, wherein along the flow direction 52a the deflection channel 24a is arranged between the suction region 96a and the feed channel 44a.
  • the feed channel 44a is hereby provided for a purposeful supply of cleaned air to the motor unit 16a and / or the electronic unit 18a.
  • the deflection channel 24a and the feed channel 44a each have a channel housing 98a, 100a, which extends along a longitudinal extension 102a, 104a in the circumferential direction 106a, 108a around the deflection channel 24a and the supply channel 44a, so that a diffused escape of particles of the Cooling air flow 20a from the deflection channel 24a and the feed channel 44a is advantageously prevented.
  • the deflection channel 24a has a spiral deflection channel section 30a, which opens into the feed channel 44a along the flow direction 52a.
  • the spiral deflection channel section 30a is at least partially formed by an Archimedean spiral and in this case has a substantially constant cross-sectional area along the flow direction 52a.
  • the cooling air flow 20a is also in a radial direction 110a of the
  • Deflection unit 22a moves from the outside inwards along the Umlenkkanals 24a and opens at a center 112a via a main outlet opening 114a in the feed channel 44a.
  • the cooling air flow 20a at differing positions in each case has a differing direction of movement 38a, 40a.
  • Umlenkkanalabitess 30a acts on the particles of the cooling air flow 20a, a centrifugal force in the curved or curved deflection channel 24a in the radial direction 110a of the deflection unit 22a to the outside.
  • This centrifugal force is dependent on a mass of the particles of the cooling air flow 20a, so that the heavy dust and / or dirt particles 26a are deflected to a greater extent in the radial direction 110a than the air 28a.
  • Those on the heavy dust and / or dirt particles 26a acting centrifugal force is also greater than a suction force generated by the fan 88a in the deflection channel 24a, so that the heavy dust and / or dirt particles 26a within the Umlenkkanals 24a and the spiral Umlenkkanalabsacrificings 30a in the radial direction 110a are deflected outwards and move in an outer region 116a through the spiral Umlenkkanalabsacrificing 30a along the flow direction 52a.
  • the air 28 a of the cooling air flow 20 a is deflected by the suction force of the fan 88 a stronger than the heavy dust and / or dirt particles 26 a during operation of the ventilation unit 14 a and thus moves in a radially inner portion 118 a through the deflection channel 24 a and the spiral Umlenkkanalabimposing 30a, so that due to the centrifugal force, a mass-dependent separation of particles and / or particles of the cooling air flow 20a within the spiral
  • the deflection unit 22a also has two outlet openings 58a, 60a in a deflection region 56a or the spiral deflection channel section 30a, which are provided for escape of the dust and / or dirt particles 26a.
  • the two outlet openings 58a, 60a are arranged on an outer wall 62a of the deflection channel 24a or of the spiral deflection channel section 30a in the radial direction 110a of the deflection unit 22a.
  • the outlet openings 58a, 60a are arranged in a circumferential direction 120a of the deflection unit 22a offset by approximately 90 ° to each other.
  • the ventilation unit 14a has two outlet channels 64a, 66a, which branch off from the deflection channel 24a at the outlet openings 58a, 60a.
  • the outlet channels 64a, 66a also form along their longitudinal extent or along a flow direction in the outlet channels 64a, 66a a closed channel, which opens on the machine housing 12a of the electric tool 10a via an opening 122a of the machine housing 12a to the outside.
  • the two outlet channels 64a, 66a extend in a tangential direction 124a of the deflection channel 24a away from the deflection channel 24a, so that an effective outflow is achieved by utilizing a mass inertia of the dust and / or dirt particles 26a during operation of the electric tool 10a.
  • a partial air flow of the cooling air flow 20a with a high dust and / or dirt particle density flows through the outlet openings 58a, 60a and the outlet channels 64a, 66a, and a partial air flow of the cooling air flow 20a through the main outlet opening 114a with a slight dust and / or or dirt particle density.
  • the outlet channels 64a, 66a are provided with a valve 188a, which has a passage direction for blowing out the dust and / or dirt particles 26a due to a flow direction of the partial air flow with the dust and / or dirt particles 26a and an undesired suction of a cooling air flow 20a the outlet channels 64a, 66a advantageously prevented.
  • FIG. 3 shows an electric tool 1 b with an alternative embodiment of a ventilation unit 14 b, which is provided for cooling a motor unit 16 b and / or an electronics unit 18 b by sucking in a cooling air flow 20 b.
  • the ventilation unit 14b has a dirt separator unit 90b formed by a u-shaped centrifugal separator 94b, which comprises a deflection unit 22b (FIGS. 3 and 4).
  • the deflecting unit 22b has an intake passage 50b, a deflecting passage 24b and a supply passage 44b, wherein the deflecting passage 24b is arranged along a flow direction 52b, 54b between the intake passage 50b and the deflecting passage 24b.
  • the flow direction 52b of the cooling air flow 20b in the intake passage 50b is substantially opposite to the flow direction 54b of the cooling air flow 20b in the supply passage 44b.
  • the deflection unit 22b is arranged along a main extension direction 84b of the power tool 10b in an end region 126b of a motor housing 82b facing away from a gear housing 80b.
  • the deflection channel 24b has a bent deflecting channel section 30, which is designed in U-shaped or ring-segment-like fashion and is arranged in the end region 126b.
  • the deflection unit 22b has an additional housing shell 128b, which is arranged around the end region 126b of the motor housing 82b in a circumferential direction 130b, wherein the suction channel 50b between the additional housing shell 128b and a in the radial direction 132b of the motor housing 82b outwardly facing surface 134b of the motor housing 82b is arranged.
  • the intake passage 50b extends in the main extension direction 84b of the power tool 10b.
  • the supply passage 44b having a cooling air flow 20b cleaned of dust and / or dirt particles 26b along a main extension direction 84b of the power tool 10b from the end region 126b leads in the direction of the motor unit 16b ( Figures 3 and 4).
  • the deflection unit 22b has an outlet opening 58b, which is provided for the escape of a partial air flow of the cooling air flow 20b with a high density of heavy dust and / or dirt particles 26b during operation of the ventilation unit 14b.
  • the outlet opening 58b is arranged on an outer wall 62b in a radial direction 140b of the curved deflection channel section 30b, wherein an outlet channel 64b of the ventilation unit 14b branches off at the outlet opening 58b.
  • the outlet channel 64b is formed between the additional housing shell 128b and the motor housing 82b, which form a substantially inwardly directed outlet channel 64b in the radial direction 132b of the power tool 10b (FIGS. 3 and 4).
  • a principle of separation of heavy dust and / or dirt particles 26b from air of the cooling air flow 20b takes place analogously to the exemplary embodiment in FIGS. 1 and 2.
  • the outlet channel 64b is provided with a valve having a passage direction for blowing out the dust and / or dirt particles 26b along a flow direction of a partial air flow with the dust and / or dirt particles 26b and a undesirable suction of a cooling air flow 20b through the outlet channel 64b advantageously prevented.
  • the deflection unit 22b has a plurality of curved or curved deflection channel sections 30b arranged one after the other.
  • FIG. 5 shows an alternative embodiment of a ventilation unit 14c for a power tool.
  • the ventilation unit 14c comprises a dirt separator unit 90c with a deflection unit 22c and an outlet channel 64c.
  • the deflection unit 22c has a deflection channel 24c with a plurality of bent deflection channel sections 30c.
  • the deflection unit 22c has an intake passage 50c and a supply passage 44c, wherein a flow direction 52c of a cooling air flow 20c in the intake passage 50c is substantially opposite to a flow direction 54c of the cooling air flow 20c in the supply passage 44c.
  • the deflection channel 24c has several
  • the main outlet openings 114c are arranged between webs 142c of a machine housing 12c, wherein the flow direction 52c of the cooling air flow 20c in the feed channel 44c is aligned substantially parallel to a longitudinal extent of the webs 142c.
  • the exhaust passage 64c is disposed along a direction 144c extending across the longitudinal extensions of the lands 142c in a central region 146c of the dirt separator unit 90c, and is surrounded on both sides by the supply passage 44c along this direction 144c.
  • the feed channel 44c is also interposed along the direction 144c the intake passage 50c and the exhaust passage 64c.
  • a deflection of the cooling air flow 20c in the deflection unit 22c is analogous to the embodiments in Figures 1 to 4.
  • FIG. 6 shows an alternative embodiment of an electric tool 10d with a ventilation unit 14d.
  • the ventilation unit 14d comprises one of a centrifugal separator 94d, referred to as
  • Cyclone separator is formed, formed Schmutzabscheiderussi 9Od.
  • the dirt separator unit 9Od is arranged on an end region 126d facing a motor unit 16d along a main extension direction 84d of the electric tool 1Od thereon.
  • the dirt separator unit 9Od has a separate housing 148d which extends along the main extension direction 84d of the electric tool 1Od from a motor housing 82d of the electric tool 10d. In a partial area 15Od of the housing 148d facing the motor housing 82d, it is cylindrical in shape along the main extension direction 84d, wherein suction openings 86d are arranged between the housing 148d and the motor housing 82d.
  • a partial region 152d of the housing 148d facing away from the motor housing 82d is conically tapered along the main extension direction 84d of the motor unit 16d in one direction of the dirt separator unit 9Od and opens into a cylindrical outlet channel 64d along the main extension direction 84d.
  • the motor housing 82d has a tapered extension 154d which extends into the motor housing 82d facing portion 15Od of the housing 148D, wherein a cross-sectional area of the extension 154d is smaller than a cross-sectional area of the portion 15Od of the housing 148D.
  • the 154d is formed as a feed channel 44d, by means of which a partial air flow of the cooling air flow 2Od cleaned of dust and / or dirt particles is guided to the motor unit 16d or an electronic unit during operation.
  • the dirt separator unit 9Od is arranged within the motor housing 82d or is integrated in this.
  • the cooling air flow 2Od is sucked in by means of a fan wheel (not shown).
  • a fan wheel not shown
  • an air is sucked through the suction openings 86d, wherein a shape of the suction openings 86d is configured such that the air is at least partially accelerated in a tangential direction or in a circumferential direction 48d of the feed channel 44d.
  • the circumferential direction 48d extends perpendicular to the main extension direction 84d around the feed channel 44d.
  • the dirt separator unit 9Od has a deflection unit 22d with a deflection channel 24d which extends between a surface 158d of the feed channel 44d facing outward in the radial direction 156d of the feed channel 44d and the housing 148d.
  • the feed channel 44d is formed here as a dip tube 46d and extends into a deflection region 56d of the deflection unit 22d, wherein the deflection channel 24d is arranged in the radial direction 156d around the dip tube 46d.
  • the sucked air is also moved by the motor unit 16d in the direction of the dirt separator unit 9Od due to a suction force of the ventilation unit 14d, so that the sucked cooling air flow 2Od rotates helically in the circumferential direction 48d around the dip tube 46d. Due to the tapered trained
  • Partial region 152d of the housing 148d rotates the sucked cooling air flow 2Od helical orbits with a along the motor housing 82d toward the dirt separator unit 9Od decreasing radius, so that the cooling air flow 2Od increasing centrifugal force acts to the outside, resulting in a mass-dependent separation of dust and / or dirt particles and air of the cooling air flow 2Od within the deflection unit 22d leads.
  • the heavy dust and / or dirt particles are deflected outward in the radial direction 156d and deposited on a conically tapered housing wall 162d, while the air is deflected due to a suction force of the ventilation unit 14d into an inner region 16Od in the radial direction 156d.
  • the air of the cooling air flow 2Od is generated by a fan generated by the fan
  • a cleaning action of the dirt separator unit 9Od can depend on a suction power of the fan unit and / or a geometry of the tapered partial region 152d of the housing 148d and / or an alignment of the suction openings 86d and / or further components that appear appropriate to the person skilled in the art.
  • the outlet channel 64a is provided with a valve which has a passage direction for blowing out the dust and / or dirt particles along a flow direction of the partial air flow with the dust and / or dirt particles, and an undesirable suction of a cooling air flow 2Od through the outlet channel 64a advantageously prevented.
  • FIG. 7 shows an alternative dirt separator unit 9Oe of a power tool.
  • the dirt separator unit 9Oe is formed by a gravity separator unit and has a deflection unit 22e with a deflection channel 24e, which is provided for a deflection of a cooling air flow 2Oe to a separation of dust and / or dirt particles 26e and air 28e of the cooling air flow 2Oe.
  • the deflection channel 24e has a multiplicity of deflection channel sections 34e, 36e, wherein the deflection channel sections 34e, 36e are in each case parallel to one another. are ordered.
  • a direction of movement 38e of the cooling air flow 2Oe in this case is directed in the deflection channel section 34e in a direction of movement 4Oe of the cooling air flow 2Oe from directly adjacent deflection channel sections 36e.
  • the dirt separator unit 9Oe has two housing shells 166e, which are each comb-shaped in the region of the deflection unit 22e, comb-tooth-like extensions 168e projecting into the deflection channel 24e substantially perpendicular to the housing shell 166e.
  • the comb-tooth-like extensions 168e of the two housing shells 166e are offset along an axial direction 17Oe of the deflection channel 24e, so that a deflection channel section 34e, 36e is arranged between each two comb-tooth-like extensions 168e.
  • a deflection channel section 34e, 36e is arranged between each two comb-tooth-like extensions 168e.
  • one end 172e of a comb-like extension 168e facing away from the housing shell 166e, on which the comb-like extension 168e is disposed, is thereby deflected, the cooling air flow 2Oe.
  • the deflecting unit 22e is integrated in the electrical appliance in such a way that, when the electrical appliance is used as intended, the direction of movement 38e of the cooling air flow 2Oe in the deflecting duct section 34e is oriented substantially perpendicular to a gravitational force or gravitational force, as is advantageous in particular for stationary electrical appliances can.
  • the gravitational force of the particles thus counteracts a suction force of the ventilation unit 14e, so that they deposit in the direction of gravity.
  • the deflection unit 22e For receiving or accumulating deposited dust and / or dirt particles 26e, the deflection unit 22e has a plurality of chambers 42e, which are arranged in a deflection region 56e in the deflection channel 24e.
  • the chambers 42e are provided with a resealable opening flap 186e, by means of which a cleaning of the chambers 42e is made possible for an operator of the electrical appliance.
  • the opening flap 186e can be opened and closed by means of a closure element (not shown in more detail) on the opening flap 186e and is pivotably arranged on the housing shell 166e.
  • a closure element not shown in more detail
  • the opening flap 186e is activated via a switch-on element of the power tool and thus can be opened or closed.
  • the opening flap 186e may remain closed in the operation of the ventilation unit due to a negative pressure in the deflection channel 24e and only in a non-operation due to a spring force of a preloaded spring in an open state.
  • FIGS. 8 to 10 show a filter device 68f for an electric tool.
  • the filter device 68f has a filter unit 7Of and a dedusting unit 74f.
  • the filter unit 7Of comprises a filter element 72f and a frame element 174f, which is provided for receiving the filter element 72f and by means of which the filter element 72f can be attached to the power tool.
  • the dedusting unit 74f is provided for dedusting the filter element 72f and has a dedusting element 76f for this purpose.
  • the dedusting element 76f is movably mounted on the frame element 174f along a longitudinal extent 176f of the dedusting element 76f, the frame element 174f having a guide element 178f for this purpose.
  • the latter At an end remote from the filter element 72f along the longitudinal extent 176f of the dedusting element 76f, the latter has an actuating element 180f, by means of which an operator can move the dedusting element 76f along its longitudinal extent 176f. At an end facing away from the actuating element 180f along the longitudinal extension 176f of the dedusting element 76f, this has an end
  • Stop element 182f which abuts a dedusting of the filter element 72f at this.
  • a spring element 78f which is formed by a helical spring and which is arranged in a circumferential direction 184f around the dedusting element 76f. In a relaxed operating position of the spring element 78f, the stop element 182f bears against the filter element 72f.
  • the actuating element 180f For dedusting the filter element 72f, the actuating element 180f is moved together with the dedusting element 76f against the spring force of the spring element 78f along the longitudinal extension 176f from the stop element 182f in the direction of the actuating element 180f. After releasing the operating member 180f, the dedusting member 76f is accelerated toward the filter member 72f along the longitudinal extension 176f due to the spring force of the spring member 78f, and strikes the filter member 72f in an end position. As a result, a dust adhering to the filter element 72f is released and falls off the filter element 72f.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Abstract

L’invention concerne un outil électrique comprenant un boîtier mécanique (12a-e) et une unité d’aération (14a-e), qui est prévue pour le refroidissement d’une unité moteur (16a-e) et/ou d’une unité électronique (18a-e) entourée par le boîtier mécanique (12a-e), par aspiration d’un courant d’air froid (20a-e), et qui comporte une unité de déviation (22a-e). L’invention propose que l’unité de déviation (22a-e) présente au moins un canal de déviation (24a-e), destiné à séparer au moyen d’une déviation du courant d’air froid (20a-e) les particules de poussières (26a-e) et l’air (28a-e) du courant d’air froid (20a‑e).
EP09780000.7A 2008-08-20 2009-06-29 Outil électrique Active EP2326465B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008041370A DE102008041370A1 (de) 2008-08-20 2008-08-20 Elektrowerkzeug
PCT/EP2009/058103 WO2010020456A1 (fr) 2008-08-20 2009-06-29 Outil électrique

Publications (2)

Publication Number Publication Date
EP2326465A1 true EP2326465A1 (fr) 2011-06-01
EP2326465B1 EP2326465B1 (fr) 2017-06-21

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EP09780000.7A Active EP2326465B1 (fr) 2008-08-20 2009-06-29 Outil électrique

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US (1) US20110148227A1 (fr)
EP (1) EP2326465B1 (fr)
CN (1) CN102123832A (fr)
DE (1) DE102008041370A1 (fr)
RU (1) RU2011110112A (fr)
WO (1) WO2010020456A1 (fr)

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Also Published As

Publication number Publication date
RU2011110112A (ru) 2012-09-27
US20110148227A1 (en) 2011-06-23
DE102008041370A1 (de) 2010-02-25
CN102123832A (zh) 2011-07-13
EP2326465B1 (fr) 2017-06-21
WO2010020456A1 (fr) 2010-02-25

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