EP2873848A1 - Appareil de travail manuel doté d'une pompe, pompe et soufflet de pompe - Google Patents

Appareil de travail manuel doté d'une pompe, pompe et soufflet de pompe Download PDF

Info

Publication number
EP2873848A1
EP2873848A1 EP20140003764 EP14003764A EP2873848A1 EP 2873848 A1 EP2873848 A1 EP 2873848A1 EP 20140003764 EP20140003764 EP 20140003764 EP 14003764 A EP14003764 A EP 14003764A EP 2873848 A1 EP2873848 A1 EP 2873848A1
Authority
EP
European Patent Office
Prior art keywords
pump
dome
bellows
base portion
wall thickness
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
EP20140003764
Other languages
German (de)
English (en)
Other versions
EP2873848B1 (fr
Inventor
Robert Feulner
Harald Bühner
Ricardo Hojczyk
Tobias Bernhard
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.)
Andreas Stihl AG and Co KG
Original Assignee
Andreas Stihl AG and Co KG
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 Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
Publication of EP2873848A1 publication Critical patent/EP2873848A1/fr
Application granted granted Critical
Publication of EP2873848B1 publication Critical patent/EP2873848B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/046—Arrangements for driving diaphragm-type pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/16—Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/16—Feeding by means of driven pumps characterised by provision of personally-, e.g. manually-, operated pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/18—Feeding by means of driven pumps characterised by provision of main and auxiliary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/14—Pumps characterised by muscle-power operation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/85986—Pumped fluid control

Definitions

  • the invention relates to a hand-held implement with a pump of the type specified in the preamble of claim 1, a pump of the type specified in the preamble of claim 10 and a pump bellows for a pump of the type specified in the preamble of claim 11.
  • a hand-held work implement with a diaphragm carburetor which comprises an operator-actuable pump.
  • the pump is designed as a rinsing pump and delivers fuel from the fuel system in the fuel tank.
  • the pump has a pump bellows.
  • the pump bellows is fixed with a mounting section on the carburetor housing.
  • the adjoining area of the pump bellows has a constant wall thickness.
  • the invention has for its object to provide a hand-held implement of the generic type, the pump bellows sufficiently large restoring forces and has a simple structure.
  • Another object of the invention is to To provide a simply constructed pump and a pumping bellows for a pump with a simple structure.
  • the wall thickness of the pump bellows in the base section is greater than the wall thickness of the dome-shaped section for this purpose.
  • the lowest wall thickness of the base section is at least 10% larger than the lowest wall thickness of the dome-shaped section.
  • the lowest wall thickness of the base portion is at least 25%, in particular at least 50% larger than the smallest wall thickness of the dome-shaped portion.
  • the wall thickness in the dome-shaped portion is smaller and advantageous over known designs is not increased, the actuation force, which is required for pressing the dome-shaped portion, only slightly increased.
  • the dome-shaped portion is pressed in pressing advantageous from a convex shape into a concave shape. The force required for this remains largely the same.
  • you press the wall is pressed in the base section to the outside.
  • the force required for this purpose is increased by the increased wall thickness in the base section.
  • the restoring force increases.
  • the lowest wall thickness of the base section is advantageously at most 10% less than the largest wall thickness of the base section.
  • the wall thickness of the base section is therefore approximately constant.
  • the wall thickness of the base section is advantageous in Frame of manufacturing accuracy constant. This allows high restoring forces and thus a rapid return of the pump bellows are achieved in its original position.
  • the wall thickness of the pump bellows advantageously decreases continuously in the direction of the dome. As a result, the forces necessary for pressing in the pump bellows and for adjusting the dome-shaped section from the convex to the concave position can be kept comparatively low.
  • the dome-shaped section extends over less than 50% of the height of the pump bellows.
  • the base portion is comparatively high, so that very high restoring forces can be achieved.
  • the height of the base section is at least 20%, preferably at least 25% of the height of the pump bellows.
  • the dome-shaped portion of the pumping bellows is the portion of the pumping bellows in which the outer wall is bent.
  • the outer wall may be slightly bent or straight, parallel to the central axis or slightly inclined with respect to the central axis of the pumping bellows.
  • the outer wall of the pumping bellows in each cutting plane, which contains the central axis of the pump bellows advantageously encloses an angle of more than 3 ° with the central axis at each point in the sectional plane.
  • the angle which the outer wall of the pump bellows encloses with the central axis of the pump bellows is advantageously not more than 3 °.
  • the angle which the outer wall of the pumping bellows encloses with the central axis of the pumping bellows increases continuously in the dome-shaped section.
  • the dome-shaped portion may for example run in a circular arc.
  • the base section advantageously has, on its side facing the dome-shaped section, a diameter which is at least 75% of the diameter of the base section on the side facing the fastening section.
  • the dome-shaped portion has on its side facing the base portion a diameter which is more than 90% of the diameter of the base portion at the attachment portion facing side amounts. Accordingly, the diameter of the base portion only slightly decreases from the side facing the attachment portion to the side facing the dome-shaped portion.
  • a largely constant outer diameter of the pump bellows in the base section may also be advantageous.
  • a slight inclination of the side wall of the pump bellows in the base section with respect to the central axis can be advantageous for the demolding of the pump bellows from a casting tool or injection molding tool.
  • the outer diameter of the pump bellows advantageously decreases sharply.
  • the largest diameter of the dome which corresponds to the smallest diameter of the dome-shaped portion, is advantageously less than 50% of the largest outer diameter of the base portion.
  • the largest diameter of the dome is less than 40% of the largest outside diameter of the base section.
  • the ratio of the height of the base portion to its largest diameter is advantageously from about 0.2 to about 0.4.
  • the lowest wall thickness of the basic section of the pumping bellows is at least 10% greater than the lowest wall thickness of the dome-shaped section.
  • the lowest wall thickness of the basic section of the pump bellows is at least 10% greater than the lowest wall thickness of the dome-shaped section.
  • Fig. 1 shows as an exemplary embodiment of a hand-held implement a power saw 1.
  • the power saw 1 has a housing 2, on which a rear handle 3 and a handle tube 4 are arranged. At the side facing away from the rear handle 3 of the housing 2 protrudes a guide rail 9 forward, at the one in Fig. 1 only schematically shown saw chain 10 is arranged circumferentially.
  • a throttle 6 and a throttle lock 7 are pivotally mounted.
  • the throttle lever 6 is used to operate a housing 2 arranged in the drive motor of the saw chain 10 on the guide rail 9 rotatably drives. For starting the drive motor, which is used as internal combustion engine 14 (FIG. Fig.
  • a hand guard 5 On the side facing the guide rail 9 side of the handle tube 4, a hand guard 5 is arranged, which can be pivotally mounted on the housing 2 and serve to trigger a braking device, not shown for the saw chain 10 can.
  • a fuel tank 11 On the housing 2 adjacent to the rear handle 3, a fuel tank 11 is integrated. Adjacent to the guide rail 9, a lubricating oil tank 12 is provided. From the housing 2 protrudes a pump bellows 13, which will be described in more detail below.
  • Fig. 2 For example, the internal combustion engine 14 for driving the saw chain 10 and the fuel supply system for the internal combustion engine 14 are shown schematically. The representation is not to scale.
  • the internal combustion engine 14 is formed in the embodiment as a two-stroke engine and has a cylinder 15 in which a combustion chamber 16 is formed.
  • the combustion chamber 16 is bounded by a piston 17 reciprocally mounted in the cylinder 15.
  • the piston 17 drives via a connecting rod 18 a in a crankcase 21 about a rotational axis 20 rotatably mounted crankshaft 19 at.
  • the in Fig. 2 is shown, the interior of the crankcase 21 is connected via overflow 23 with the combustion chamber 16 so that fuel / air mixture from the crankcase 21 can pass into the combustion chamber 16. From the combustion chamber 16 is controlled by the piston 17 outlet 24.
  • an intake passage 22 which opens at the cylinder bore and is also controlled by the piston 17.
  • a portion of the intake passage 22 is formed in a carburetor 25 which supplies fuel to the intake combustion air.
  • a throttle element 26 is mounted for controlling the amount of fuel / air mixture supplied.
  • the throttle element 26 is a throttle valve. In the region of the throttle element 26 secondary fuel openings 27 open into the intake passage 22. Upstream of the throttle element 26 opens a main fuel opening 43 in the intake passage.
  • a fuel pump 28 For supplying fuel, a fuel pump 28 is provided, which is arranged in the housing 41 of the carburetor 25.
  • the fuel pump 28 is driven by the fluctuating pressure in the crankcase 21.
  • the fuel pump 28 is connected via a fuel line 29 to the fuel tank 11. Fuel is sucked from the fuel tank 11 via the fuel line 29.
  • the fuel line 29 opens via a suction valve 32 into a fuel chamber 31, which is delimited by a pump diaphragm 30.
  • the pump diaphragm 30 is pulled or pushed by the fluctuating crankcase pressure from the fuel chamber 31.
  • fuel is sucked in via the intake valve 32 from the fuel line 29 into the fuel chamber 31 or pumped via an outflow valve 33 from the fuel chamber 31.
  • the fuel passes via an inlet valve 34 into a control chamber 35 formed in the carburetor 25.
  • the control chamber 35 is delimited by a control diaphragm 36.
  • the control chamber 35 side facing away the control diaphragm 36 defines a compensation chamber 37, which may be acted upon by the ambient pressure or the pressure prevailing on the clean side of an intake air filter, not shown.
  • the position of the inlet valve 34 is coupled via a lever 38 to the position of the control diaphragm 36.
  • the lever 38 is biased by a spring 39 in the closed position of the inlet valve 34. From the control chamber 35, the fuel reaches the auxiliary fuel ports 27 and the main fuel port 43.
  • a pump 40 is provided which is manually operated by the operator.
  • the pump 40 is designed as a rinsing pump.
  • the pump 40 has the pumping bellows 13, which protrudes from the housing 2 and is therefore easy to operate by the operator.
  • the pump bellows 13 defines an interior space 44, which is connected via a first valve 45 to an intake line 42.
  • the first valve 45 opens in the flow direction into the inner space 44.
  • the intake line 42 is connected to the region of the fuel supply system which supplies the fuel to the main fuel port 43.
  • the fuel line 42 may also be connected to the control chamber 35 or to the secondary fuel openings 27.
  • the interior 44 of the pump bellows 13 is connected via a second valve 46, which opens in the flow direction from the interior 44, with an outflow line 47, which opens into the fuel tank 11. If the pump bellows 13 is pressed by the operator, the fuel located in the interior space 44 is partially conveyed via the second valve 46 and the outflow line 47 into the fuel tank 11. When you release the pump bellows 13, the pump bellows 13 relaxes in its starting position. In this case, fuel from the fuel supply system via the first valve 45 is sucked into the interior 44.
  • the inlet valve 34 opens into the control chamber 35 and fuel from the fuel pump and the fuel line 29 flows into the control chamber 35. As a result, the fuel pump 28 and the fuel line 29 can be flushed.
  • the pump 40 may serve to deliver fuel directly into the intake passage 22 when the engine 14 is started.
  • the discharge line 47 opens advantageously not in the fuel tank 11, but in the intake passage 22.
  • the pump 40 then serves not or not only as a rinse pump, but as a start enrichment pump.
  • Fig. 2 shows a fuel supply system in which a carburetor for supplying fuel is provided.
  • Fig. 3 shows an alternative embodiment of a fuel supply system in which the fuel is supplied via a fuel valve 50 in the crankcase 21 of the engine 14.
  • the same reference numerals denote corresponding elements as in Fig. 2 ,
  • the fuel supply system 28 shown, the fuel pump 28, a control system for the fuel pressure and the operator-operated pump 40 are arranged in a housing 49.
  • the fuel pump 28 is connected via the fuel line 29 with a arranged in the fuel tank 11 suction head 48, is sucked through the fuel.
  • the fuel passes via the intake valve 32 into the fuel chamber 31 and from there via the outflow valve 33 and the inlet valve 34 into the control chamber 35 of the pressure control system.
  • the fuel pump 28 is driven by the fluctuating pressure in the crankcase 21.
  • a pulse line 72 is provided, which in Fig. 3 is shown schematically.
  • the impulse line 72 connects the side facing away from the fuel chamber 31 of the pump diaphragm 30 with the interior of the crankcase 21.
  • the spring 38 that biases the intake valve is shown schematically in the compensation chamber 37.
  • a fuel line 52 leads to a pressure regulator 53. From there, the fuel is supplied to the fuel valve 50.
  • the fuel valve 50 is connected to the fuel tank 11 via a return line 55 in which a check valve 54 is disposed.
  • the operator-operable pump 40 is disposed in the fuel line 52 and includes the first valve 45, the pumping bellows 13, and the second valve 46. Between the portion of the fuel line 52 leading to the first valve 45 and the portion of the fuel line 52 is connected to the second valve 46, a check valve 51 is arranged.
  • the check valve 51 opens in Direction to the fuel valve 50 and prevents that via the pump 40, fuel flowing out of the second valve 46, is sucked in again via the first valve 45.
  • the pump 40 is actuated by the operator a few times. Thereby, fuel from the fuel supply system is conveyed into the fuel tank 11 together with the gas bubbles accumulated therein, and fresh fuel is sucked in via the suction head 48 and the fuel supply system is flooded. As a result, fuel from the fuel supply system is already available when starting the internal combustion engine 14.
  • Fig. 4 shows the design of the pumping bellows 13 in detail.
  • the pump bellows 13 has a mounting portion 56, with which the pump bellows 13 is fixed to the housing 49.
  • a holding element 62 is used for fixing the pump bellows 13, a holding element 62 is used.
  • the housing 49 and the holding element 62 are in Fig. 4 shown schematically.
  • the attachment section 56 is adjoined by a base section 57, in which the pump bellows 13 is cylindrical or slightly conical, ie frustoconical.
  • a roof section 58 connects.
  • the roof portion 58 includes a dome-shaped portion 59 which adjoins the base portion 57 and a dome 60 which closes the dome-shaped portion 59.
  • the attachment portion 56, the base portion 57, the dome-shaped portion 59, and the dome 60 extend between planes that are perpendicular to the central axis 67.
  • the sections are accordingly formed by imaginary disks which would be formed when cutting the pump bellows 13 with cuts aligned perpendicular to the center axis 67.
  • the attachment portion 56 has an edge 61 at which the outer diameter of the pumping bellows 13 is increased.
  • the edge 61 of the pump bellows 13 has an outer diameter a, which may be for example from about 15 mm to about 25 mm.
  • the holding element 62 rests on and presses the edge 61 against the housing 49.
  • the pump bellows 13 has at the edge 61 a recess 63 into which the housing 49 engages.
  • the region of the edge 61 lying radially outside the recess 63 forms a holding section 64.
  • the holding section 64 prevents the edge 61 radially inward, that slide in the direction of the central axis 67 of the pumping bellows 13 and thereby can be detached from the holding element 62.
  • a connecting portion 65 connects, in which the pump bellows 13 may be formed, for example, cylindrical or frustoconical.
  • the connecting portion 65 is in the exemplary embodiment within the holding member 62.
  • the connecting portion 65 may be partially or completely within the holding member 62.
  • the pump bellows 13 has an outer diameter b, which may be, for example, about 2 mm to about 5 mm smaller than the outer diameter a.
  • Adjoining the connecting section 65 is a transition section 66, in which the outer wall 68 of the pump bellows 13 is bent in the exemplary embodiment.
  • the outer diameter of the pump bellows 13 is reduced to an outer diameter c, which may be, for example, about 2 mm to about 10 mm smaller than the outer diameter b.
  • the outer diameter c corresponds to the largest outer diameter of the base portion 57.
  • the attachment portion 56 has a height k measured parallel to the central axis 67, which may be from about 15% to about 35% of the total height e of the pumping bellows 13.
  • the central axis 67 is the symmetry line of the pump bellows 13.
  • the pump bellows 13 is rotationally symmetrical with respect to the center axis 67.
  • the adjoining the attachment portion 56 base portion 57 has a height 1, which may be about 25% to about 45% of the total height i of the pumping bellows 13.
  • the ratio of the height 1 to the total height i is about 34% to 38%.
  • the ratio of the height 1 to the largest diameter c of the base portion 57 is advantageously from about 0.2 to about 0.4.
  • the ratio of the height 1 to the diameter c is about 0.3 to about 0.35.
  • the base section 57 On its side facing the dome-shaped section 59, the base section 57 has an outer diameter d.
  • the outer diameter d is at least 75% of the largest diameter c of the base portion 57.
  • the diameter d is more than 90% of the diameter c.
  • the diameter of the base portion 57 may also be approximately constant. In the embodiment, the outer diameter decreases in the base portion 57 slightly.
  • the outer wall 68 extends in the in Fig. 4 shown cutting plane, the central axis 67th contains, straight and includes with the central axis 67 an angle ⁇ , which is preferably at least 3 °. As a result, the pump bellows 13, which consists of plastic, are easily removed from the mold.
  • the outer diameter decreases very much.
  • the roof section 58 may be formed in section, for example, as a circular arc section, in particular approximately as a semicircle.
  • the dome-shaped section 59 On its side facing the crest 60, the dome-shaped section 59 has an outer diameter e which is significantly smaller than the outer diameter d at the base section 57.
  • the ratio of the outer diameter e to the outer diameter d is about 0.2 to about 0.5, preferably about 0.3 to about 0.4.
  • the largest diameter e of the dome 60 is advantageously less than 50% of the largest outer diameter c of the base section 57.
  • the dome-shaped section 59 has a height m which is advantageously greater than the height 1 of the base section 57 and greater than the height k of the attachment section 56 , However, the height m is advantageously less than 50% of the total height i of the pumping bellows 13.
  • the height m is about 35% to 45% of the total height i.
  • the outer wall 68 of the pump bellows 13 includes in the dome-shaped portion 59 in each sectional plane containing the central axis 67, with the central axis 67 at an angle ⁇ , which is greater than 3 °, in particular greater than 5 °.
  • the dome-shaped portion 59 advantageously begins in the region in which the outer wall 68 curves to the central axis 67, while the outer wall 68 in the base portion 57 is advantageously straight and inclined at a constant angle to the central axis 67. If the outer wall 68 also slightly curves in the base section 57, the dome-shaped section 59 begins at the point at which the outer wall 68 encloses an angle ⁇ of 3 ° with the central axis 67.
  • the dome 60 is the area of the pumping bellows 13 which closes the dome-shaped section 59.
  • the dome 60 has a height n which advantageously corresponds to less than 5%, in particular less than 10% of the total height i of the pump bellows 13.
  • the pump bellows 13 is made thickened in the region of the base section 57.
  • the wall thickness of the pump bellows 13 decreases continuously.
  • the wall thickness can be greater, in particular for manufacturing reasons.
  • the wall thickness g is at most 10% smaller than the maximum wall thickness f of the base section 57.
  • the wall thicknesses f and g can also be approximately equal.
  • the wall thickness of the wall thickness g on the side facing the base portion 57 decreases continuously to a wall thickness h on the side facing the dome 60.
  • the smallest wall thickness g of the base portion 57 is at least 10% greater than the lowest wall thickness h of the dome-shaped portion 59.
  • the lowest wall thickness g of the base portion 57 is made thickened compared to the lowest wall thickness h of the dome-shaped portion 59.
  • the lowest wall thickness g of the base portion 57 is at least 20%, preferably at least 50% greater than the lowest wall thickness h of the dome-shaped portion 59.
  • the lowest wall thickness g of the base portion 57 is about 70% greater than the lowest wall thickness h of the dome-shaped portion 59th
  • the pumping bellows 13 is made of plastic, preferably of a urethane-based thermoplastic elastomer.
  • Fig. 5 shows the pump bellows 13 in cross section, wherein the cross-sectional shape of a known pumping bellows 73 is complemented with crossing hatching.
  • the pump bellows 13 according to the invention differs by a thickened Area 69.
  • the thickened area 69 is provided at the base portion 57.
  • the thickening can be, for example, about 3 mm to about 8 mm.
  • the thickened region 69 runs out in such a way that a continuous outer contour without steps results. Adjacent to the dome 60, the dome-shaped portion 59 is not thickened.
  • the Fig. 6 to 10 show the deformation of the pump bellows 13 when the pump bellows 13 is pressed by a finger 70 shown schematically. In each case only one half of the pump bellows 13 is shown. The other half of the pump bellows 13 behaves accordingly due to the symmetry.
  • the known shape of the pumping bellows 13 is indicated by a solid line and the new shape by a dashed line 71.
  • Fig. 6 shows the pump bellows 13 in the de-energized state and Fig. 10 in pressed-in state.
  • the Fig. 7 to 9 show intermediate stages. As the 6 and 7 show, the area of the dome 60 of the in Fig. 6 shown convex design in the in Fig. 7 compressed concave shape. In further, in the Fig.
  • the dome-shaped portion 59 curls inwardly.
  • the thickened base portion 57 is deformed only slightly outward. As a result, this area can apply a high restoring force. Due to the small thickening in the dome-shaped section 59, the actuating forces are comparatively low. As a result of the partial thickening of the pump bellows 13 in the base section 57, a low actuating force can be achieved while at the same time providing the pump bellows 13 with a quicker recovery in the in Fig. 6 shown unactuated state can be achieved even at low temperatures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP14003764.9A 2013-11-19 2014-11-08 Appareil de travail manuel doté d'une pompe, pompe et soufflet de pompe Active EP2873848B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013019379.6A DE102013019379A1 (de) 2013-11-19 2013-11-19 Handgeführtes Arbeitsgerät mit einer Pumpe, Pumpe und Pumpenbalg

Publications (2)

Publication Number Publication Date
EP2873848A1 true EP2873848A1 (fr) 2015-05-20
EP2873848B1 EP2873848B1 (fr) 2018-01-10

Family

ID=51868747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14003764.9A Active EP2873848B1 (fr) 2013-11-19 2014-11-08 Appareil de travail manuel doté d'une pompe, pompe et soufflet de pompe

Country Status (4)

Country Link
US (1) US10202951B2 (fr)
EP (1) EP2873848B1 (fr)
CN (1) CN104653367B (fr)
DE (1) DE102013019379A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015016484A1 (de) * 2015-12-15 2017-06-22 Andreas Stihl Ag & Co. Kg Manuell zu betätigende Förderpumpe und Kraftstoffsystem mit einer Förderpumpe
DE102018004881A1 (de) * 2018-06-19 2019-12-19 Andreas Stihl Ag & Co. Kg Vergaser und handgeführtes Arbeitsgerät mit einem Verbrennungsmotor mit einem Vergaser

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171333A (en) * 1962-12-31 1965-03-02 Delman Co Pump for windshield washing system
US4411844A (en) * 1982-02-11 1983-10-25 Outboard Marine Corporation Priming system for a vented bowl carburetor
US5803035A (en) * 1995-05-03 1998-09-08 Briggs & Stratton Corporation Carburetor with primer lockout
DE10120127A1 (de) 2001-04-25 2002-10-31 Stihl Maschf Andreas Membranvergaser
EP2653695A2 (fr) * 2012-04-18 2013-10-23 Andreas Stihl AG & Co. KG Outil doté d'une pompe à carburant

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562317A (en) * 1946-05-16 1951-07-31 Leo W Krall Liquid dispenser with a resilient wall pump
US4197825A (en) * 1977-11-25 1980-04-15 Tecumseh Products Company Primer bulb retainer
WO1993002277A1 (fr) * 1991-07-15 1993-02-04 Reebok International Ltd. Mecanisme de gonflage
DE19941697A1 (de) 1999-09-02 2001-03-08 Stihl Maschf Andreas Membranvergaser
US6533254B1 (en) 2001-10-05 2003-03-18 Walbro Corporation Carburetor fuel pump
US7152852B1 (en) * 2004-02-17 2006-12-26 Walbro Japan, Inc. Priming system for a float bowl carburetor
US7467785B2 (en) * 2006-09-08 2008-12-23 Walbro Engine Management, L.L.C. Auxiliary fuel and air supply in a carburetor
US20120070325A1 (en) * 2010-09-17 2012-03-22 Wireman Justin Mccord Multi-layer primer apparatus and methods
CN102828853B (zh) * 2012-09-25 2014-07-30 浙江瑞星化油器制造有限公司 化油器的联动机构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171333A (en) * 1962-12-31 1965-03-02 Delman Co Pump for windshield washing system
US4411844A (en) * 1982-02-11 1983-10-25 Outboard Marine Corporation Priming system for a vented bowl carburetor
US5803035A (en) * 1995-05-03 1998-09-08 Briggs & Stratton Corporation Carburetor with primer lockout
DE10120127A1 (de) 2001-04-25 2002-10-31 Stihl Maschf Andreas Membranvergaser
EP2653695A2 (fr) * 2012-04-18 2013-10-23 Andreas Stihl AG & Co. KG Outil doté d'une pompe à carburant

Also Published As

Publication number Publication date
US10202951B2 (en) 2019-02-12
EP2873848B1 (fr) 2018-01-10
US20150136252A1 (en) 2015-05-21
CN104653367B (zh) 2018-10-23
CN104653367A (zh) 2015-05-27
DE102013019379A1 (de) 2015-05-21

Similar Documents

Publication Publication Date Title
EP0927305B1 (fr) Pompe a pistons
DE102008033411B4 (de) Rückschlagventil
DE102005061886A1 (de) Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
DE102009030593A1 (de) Vergaser und Zweitaktmotor mit einem Vergaser
DE102011089972A1 (de) Kraftstoffüberströmventil für eine Kraftstoffeinspritzeinrichtung und Kraftstoffeinspritzeinrichtung mit Kraftstoffüberströmventil
DE2738176A1 (de) Stroemungsmittelbetriebene hydraulische pumpe
DE102008057089A1 (de) Pumpeneinheit für eine Hochdruckpumpe
DE2738178A1 (de) Stroemungsmittelbetriebene hydraulische pumpe
DE102009049094A1 (de) Pumpe für ein Hochdruckreinigungsgerät
EP2873848B1 (fr) Appareil de travail manuel doté d'une pompe, pompe et soufflet de pompe
DE102004028889A1 (de) Kolbenpumpe mit schlitzgesteuertem Einlassventil
DE2218112C3 (de) Schmiereinrichtung für die Schneidketten von Motorkettensägen
DE102013009669A1 (de) Verbrennungsmotor mit einer Starteinrichtung
DE19743747B4 (de) Kolbenpumpe
DE2111645A1 (de) Druckluftbetriebene Kolbenpumpe,insbesondere Druckfluessigkeitspumpe fuer hydraulische Winden
WO2009127477A1 (fr) Pompe manuelle pour le pompage de carburant
DE102018208012A1 (de) Wassereinspritzsystem für Brennkraftmaschinen mit entsperrbarem Rückschlagventil
DE102015016484A1 (de) Manuell zu betätigende Förderpumpe und Kraftstoffsystem mit einer Förderpumpe
EP3561280B1 (fr) Carburateur et moteur à combustion interne doté d'un carburateur
DE2248584C3 (de) Kraftstoff-Fördervorrichtung zu einer Einspritzeinrichtung von Brennkraftmaschinen
DE2738177A1 (de) Stroemungsmittelbetriebene hydraulische pumpe
DE102019217248A1 (de) System und Verfahren zum Einstellen einer wirksamen Länge einer Pleuelstange sowie Brennkraftmaschine
DE102008043839A1 (de) Hochdruckpumpe
DE202006005954U1 (de) Kolbeneinheit für eine Luftpumpe
DE2537742B2 (de) Schmiereinrichtung für eine Kolbenbrennkraftmaschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20141108

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

R17P Request for examination filed (corrected)

Effective date: 20151111

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20161026

RIC1 Information provided on ipc code assigned before grant

Ipc: F02M 37/16 20060101AFI20170523BHEP

Ipc: F02M 37/00 20060101ALI20170523BHEP

Ipc: F02B 63/02 20060101ALN20170523BHEP

Ipc: F02M 37/18 20060101ALI20170523BHEP

Ipc: F02M 1/16 20060101ALI20170523BHEP

Ipc: F02M 37/04 20060101ALI20170523BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20170629

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 962694

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180115

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502014006927

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20180110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180410

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180410

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180411

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180510

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502014006927

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

26N No opposition filed

Effective date: 20181011

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181108

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20181130

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180110

Ref country code: MK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180110

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20141108

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 962694

Country of ref document: AT

Kind code of ref document: T

Effective date: 20191108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191108

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20221122

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231123

Year of fee payment: 10

Ref country code: DE

Payment date: 20231127

Year of fee payment: 10