EP0953763B1 - Manual pump - Google Patents

Manual pump Download PDF

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Publication number
EP0953763B1
EP0953763B1 EP19990108348 EP99108348A EP0953763B1 EP 0953763 B1 EP0953763 B1 EP 0953763B1 EP 19990108348 EP19990108348 EP 19990108348 EP 99108348 A EP99108348 A EP 99108348A EP 0953763 B1 EP0953763 B1 EP 0953763B1
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EP
European Patent Office
Prior art keywords
pump
cam
pump piston
piston
cylinder
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.)
Expired - Lifetime
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EP19990108348
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German (de)
French (fr)
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EP0953763A2 (en
EP0953763A3 (en
Inventor
Lothar Dr. Haselmann
Ulrich Schulz
Georg Strommer
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Weber Hydraulik GmbH Germany
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Weber Hydraulik GmbH Germany
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Publication of EP0953763A3 publication Critical patent/EP0953763A3/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/14Pumps characterised by muscle-power operation

Definitions

  • the present invention relates to a hand pump.
  • a hydraulic pump known (DE-AS 10 99 356), which consists of a pump cylinder with an actuated by a pump lever piston rod and piston on the one hand and with an associated container for the pressure medium on the other hand, wherein in the space above the oil reservoir, a vent valve is provided and on the pump lever, a cam is arranged, through which the vent valve is opened at each pump stroke.
  • piston pump for manual operation (DE-PS 18 45 696), in which a made of plastic, consisting of two flanged cylinder parts cylinder a piston made of plastic is arranged, which carries a rack made of the same material , in which engages a gear segment.
  • a lever-operated piston pump for draining liquid containers known (DE-AS 12 54 966), wherein the lever mechanism of the piston pump, a spring member is associated, which surrounds the piston from the lifting position to the liquid blocking position when relieving the hand lever.
  • a non-generic hydraulic hand pump is known (DE 94 14 875 U1), wherein the pump piston is moved axially upon actuation of the pump lever with respect to the pump cylinder, wherein the pumping movement of the pump lever via a shaft on a lever with a transverse to the axial direction Tang is transferred.
  • This engages in a provided at the rear end of the pump piston both transversely to the axial direction and to the pin extending laterally open, notch and thus consuming recess, so that the rotational movement of the lever nevertheless a purely linear reciprocating motion of the pump piston-without that this can cause tilting.
  • a joint does not have the pump piston.
  • a disadvantage of this known hand pump is the complicated structure of the connection between the actual pump piston via a separate -gekröpfte- piston rod with the joint on the cam. This multiplicity of components makes the structure of the known hand pump comparatively complicated and, as a result, prone to failure.
  • the invention is therefore an object of the invention to provide a simple and inexpensive to manufacture hand pump available, which is also less prone to failure due to a smaller number of functional parts.
  • a hand pump according to the preamble of claim 1 according to its ken conveyden characteristics thus characterized in that the joint is arranged on the cam associated free end of the integrally and cylindrically shaped pump piston and that the joint between the cam and the pumping head by means of a formed in a bore of the cam and engaging in a bore of the pump piston axis is formed, which is substantially parallel to the axial direction of the shaft.
  • the transmission of the pumping movement from the pumping lever to the cam is provided via the shaft, the cam interacting with the pumping piston of the pumping cylinder.
  • the core of the present invention which can not be foreseen by the person skilled in the art in accordance with the prior art now consists of frictionally engaging the pumping piston at least one joint having an axis to connect with the cam.
  • a pump piston extending for a long time is provided for the pump cylinder without a pump piston rod to be fastened thereto separately and on the cam.
  • the free end of the pump piston is connected via the joint with the cam. It thus eliminates the separate pump piston rod and its attachment to both the pump piston and the cam.
  • the hand pump is not only simple and inexpensive to produce, but has due to the arrangement of the joint for frictional interaction of the pump piston with the cam on a smaller number of functional parts, so that the hand pump according to the present invention is characterized by a significantly reduced susceptibility.
  • FIG. 1 shows a first embodiment of a hand pump according to the present invention is shown in a schematic cross-sectional view.
  • the pump movement is transmitted from a pump lever 10 via a shaft 20 to a cam 30, wherein the cam 30 cooperates with a pump piston 50 of a pump cylinder 60.
  • the pump piston 50 is frictionally connected via a joint 40 designed as an axle with the cam 30.
  • the cam 30 moved by the rotary shaft 20 is provided with the axis 40 substantially parallel to the shaft 20, which engages a bore 510 of the pumping cylinder 60 adapted thereto, so that with an oscillating reciprocating motion of the shaft 20 moving cam 30 and attached thereto in a bore 310 of the cam 30 axis 40 a reciprocating stroke movement of the pump piston 50 of the pumping cylinder 60 is effected.
  • the pump piston 50 fits with great play in the relevant pump cylinder 60, wherein the tightness is effected by two strongly projecting in the radial direction, elastically yielding piston seals 70, 80. These seals 70, 80 allow the pumping piston 50 can perform a slight tilting movement during its stroke due to the non-positive articulation on the axis 40, without at the same time the tightness of the pump piston 50 is impaired in the pumping cylinder 60.
  • an additional return member such as a spring omitted.
  • FIG. 3 shows a second embodiment of a hand pump according to the present invention in one embodiment 4 shows a schematic sectional view of the hand pump from FIG. 3 along the section line IV - IV in FIG. 3.
  • the hand pump according to the second embodiment differs from the hand pump according to the first embodiment shown in Figures 1 and 2 essentially in that the pump cylinder 60 with the pump piston 50 seen from the pump lever 10 is not back-mounted cam 30, but rather the cam 30 is upstream.
  • the solution according to the two embodiments illustrated in FIGS. 1 to 4 has a smaller number of components and as a result is cheaper and also easier to assemble. Also, there is a smaller number of components potentially affecting the function present, especially no rubbing against each other parts as in the prior art, so that there is a maximum of reliability.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Description

Die vorliegende Erfindung betrifft eine Handpumpe.The present invention relates to a hand pump.

Handpumpen sind an sich bekannt (FR 2 566 053 A1).Hand pumps are known per se (FR 2 566 053 A1).

Es ist ferner eine hydraulische Pumpe bekannt (DE-AS 10 99 356), die aus einem Pumpzylinder mit einer durch einen Pumphebel betätigten Kolbenstange und Kolben einerseits sowie mit einem damit verbundenen Behälter für das Druckmittel andererseits besteht, wobei im Raum oberhalb des Ölvorratsspiegels ein Belüftungsventil vorgesehen ist und am Pumphebel ein Nocken angeordnet ist, durch den das Belüftungsventil bei jedem Pumpenhub geöffnet wird.It is also a hydraulic pump known (DE-AS 10 99 356), which consists of a pump cylinder with an actuated by a pump lever piston rod and piston on the one hand and with an associated container for the pressure medium on the other hand, wherein in the space above the oil reservoir, a vent valve is provided and on the pump lever, a cam is arranged, through which the vent valve is opened at each pump stroke.

Es gibt auch eine Kolbenpumpe für den Handbetrieb (DE-PS 18 45 696), bei der in einem aus Kunststoff hergestellten, aus zwei mit Flanschen versehenen Zylinderteilen zusammengesetzten Zylinder ein aus Kunststoff hergestellter Kolben angeordnet ist, der eine aus dem gleichen Werkstoff bestehende Zahnstange trägt, in die ein Zahnradsegment eingreift.There is also a piston pump for manual operation (DE-PS 18 45 696), in which a made of plastic, consisting of two flanged cylinder parts cylinder a piston made of plastic is arranged, which carries a rack made of the same material , in which engages a gear segment.

Ferner ist eine durch Handhebel zu betätigende Kolbenpumpe zum Entleeren von Flüssigkeitsbehältern bekannt (DE-AS 12 54 966), wobei dem Hebelwerk der Kolbenpumpe ein Federglied zugeordnet ist, das beim Entlasten des Handhebels den Kolben aus der Heberwirkstellung in die Flüssigkeitssperrstellung umstellt.Further, a lever-operated piston pump for draining liquid containers known (DE-AS 12 54 966), wherein the lever mechanism of the piston pump, a spring member is associated, which surrounds the piston from the lifting position to the liquid blocking position when relieving the hand lever.

Weiterhin ist eine als Pumpe zur Förderung von Gasen oder Flüssigkeiten ausgebildete, mittels eines Stössels angetriebene Vakuumkolbenpumpe bekannt (DE 31 12 733 A1), deren Stössel mittels einer Hebelanordnung von einem Exzenter angetrieben wird, wobei die Hebelanordnung von zwei mittels einer Feder gegeneinander verspannten Hebeln gebildet ist, deren eine freie Enden gegenüberliegend am Exzenter gehalten sind und deren andere freie Enden in Kontakt mit dem Stössel stehen.Furthermore, designed as a pump for conveying gases or liquids, driven by a plunger vacuum piston pump is known (DE 31 12 733 A1), the plunger is driven by a lever assembly of an eccentric, wherein the lever assembly formed by two by a spring against each other strained levers is, whose one free ends are held opposite to the eccentric and whose other free ends are in contact with the plunger.

Des weiteren ist es gemäss dem Stand der Technik bekannt, mittels eines Pumphebels die Pumpbewegung auf eine Welle und von dieser Welle über einen Nocken auf einen hydraulischen Pumpkolben eines Pumpzylinders zu übertragen. Hierbei liegt der Nocken am freien Ende des Pumpkolbens an.Furthermore, it is known according to the prior art, by means of a pumping lever to transmit the pumping movement to a shaft and from this shaft via a cam to a hydraulic pump piston of a pump cylinder. Here, the cam is located at the free end of the pump piston.

Die in etwa kreisbogenförmige Bewegung des Nockens wird auf den Pumpkolben in Tangentialrichtung als Hubbewegung übertragen. Die Radialbewegung bedingt hierbei eine unerwünschte Reibungskomponente des Nockens am freien Ende des Pumpkolbens. Hinzu kommt, daß wegen des Fehlens einer kraftschlüssigen Verbindung zwischen dem Nocken und dem Pumpkolben eine diesen in eine Endstellung bewegende Feder zusätzlich vorhanden sein muß, wodurch die Handpumpe einerseits komplizierter wird, andererseits der Herstellungs- und Gestehungsaufwand grösser wird.The approximately circular arc-shaped movement of the cam is transmitted to the pump piston in the tangential direction as a lifting movement. The radial movement causes this an undesirable friction component of the cam at the free end of the pump piston. In addition, because of the lack of a frictional connection between the cam and the pump piston a spring in an end position moving spring must be additionally present, whereby the hand pump is on the one hand complicated, on the other hand, the production and Gestormungsaufwand is greater.

Ferner ist eine gattungsfremde hydraulische Handpumpe bekannt (DE 94 14 875 U1), bei der der Pumpkolben bei Betätigung des Pumphebels mit Bezug auf den Pumpzylinder axial bewegt wird, wobei die Pumpbewegung des Pumphebels über eine Welle auf einen Hebel mit einem quer zur axialen Richtung verlaufenden Zapfen übertragen wird. Dieser greift in eine an dem rückwärtigen Ende des Pumpkolbens vorgesehene sich sowohl quer zur axialen Richtung als auch zu dem Zapfen erstreckende seitlich offene, kerbartige und damit aufwendige Ausnehmung an, sodass die Drehbewegung des Hebels gleichwohl eine rein linienförmige Hin- und Herbewegung des Pumpkolbens -ohne dass dieser kippt- bewirken kann. Ein Gelenk weist der Pumpkolben nicht auf.Furthermore, a non-generic hydraulic hand pump is known (DE 94 14 875 U1), wherein the pump piston is moved axially upon actuation of the pump lever with respect to the pump cylinder, wherein the pumping movement of the pump lever via a shaft on a lever with a transverse to the axial direction Tang is transferred. This engages in a provided at the rear end of the pump piston both transversely to the axial direction and to the pin extending laterally open, notch and thus consuming recess, so that the rotational movement of the lever nevertheless a purely linear reciprocating motion of the pump piston-without that this can cause tilting. A joint does not have the pump piston.

Es ist weiter eine ebenfalls nicht gattungsgemässe, über eine Welle mit einem Hebel verbundene Handpumpe bekannt (GB 610 541), an dem das eine Ende der Pumpkolbenstange angelenkt ist. Zusätzlich zu diesem Gelenk ist auch das andere Ende der Pumpkolbenstange mit einem weiteren Gelenk an dem Pumpkolben festgelegt.It is also a likewise not generic, connected via a shaft with a lever hand pump known (GB 610 541), to which one end of the pump piston rod is articulated. In addition to this joint, the other end of the pump piston rod is fixed with another joint on the pump piston.

Schliesslich ist eine gattungsgemässe Handpumpe nach dem Oberbegriff des Hauptanspruchs sowie zugleich die Kippbewegung ausführende Handpumpe bekannt (DE 812 281), die ein grosses Spiel und mindestens eine dieses Spiel aufnehmende elastische Dichtung aufweist. Hierdurch bedingt, ergibt sich keine rein lineare, sondern zusätzlich eine in Richtung der Achse des Pumpzylinders verlaufende Kippbewegung des Pumpkolbens, wobei das sich ändernde Spiel des Pumpkolbens in dem Pumpzylinder durch eine elastische Dichtung aufgenommen wird. Der Pumpkolben ist mit einer gesonderten -gekröpften- Pumpkolbenstange über ein an deren Ende befindliches Gelenk mit dem Nocken verbunden.Finally, a generic hand pump according to the preamble of the main claim and at the same time the tilting movement exporting hand pump is known (DE 812 281), which has a large game and at least one of this game receiving elastic seal. As a result, there is no purely linear, but in addition a running in the direction of the axis of the pump cylinder tilting movement of the pump piston, wherein the changing play of the pump piston is received in the pump cylinder by an elastic seal. The pump piston is equipped with a separate-cranked pump piston rod connected via a hinge located at the end of the cam.

Von Nachteil bei dieser bekannten Handpumpe ist der komplizierte Aufbau der Verbindung zwischen dem eigentlichen Pumpkolben über eine separate -gekröpfte- Kolbenstange mit dem Gelenk an dem Nocken. Diese Vielzahl an Bauteilen macht den Aufbau der bekannten Handpumpe vergleichsweise kompliziert und infolgedessen störanfällig.A disadvantage of this known hand pump is the complicated structure of the connection between the actual pump piston via a separate -gekröpfte- piston rod with the joint on the cam. This multiplicity of components makes the structure of the known hand pump comparatively complicated and, as a result, prone to failure.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine einfach und kostengünstig herzustellende Handpumpe zur Verfügung zu stellen, die überdies aufgrund einer geringeren Anzahl funktioneller Teile weniger störanfällig ist.The invention is therefore an object of the invention to provide a simple and inexpensive to manufacture hand pump available, which is also less prone to failure due to a smaller number of functional parts.

Diese Aufgabe wird durch eine Handpumpe gemäss dem Oberbegriff des Patentanspruchs 1 gemäss dessen kenzeichnenden Merkmalen also dadurch gelöst, dass das Gelenk an dem dem Nocken zugeordneten freien Ende des einstückig sowie zylindrisch ausgebildeten Pumpkolbens angeordnet ist und dass das Gelenk zwischen dem Nocken und dem Pumpkoben mittels einer in eine Bohrung des Nockens eingepassten und in eine Bohrung des Pumpkolbens eingreifenden Achse gebildet ist, die im wesentlichen parallel zur Achsrichtung der Welle verläuft.This object is achieved by a hand pump according to the preamble of claim 1 according to its kenzeichnenden characteristics thus characterized in that the joint is arranged on the cam associated free end of the integrally and cylindrically shaped pump piston and that the joint between the cam and the pumping head by means of a formed in a bore of the cam and engaging in a bore of the pump piston axis is formed, which is substantially parallel to the axial direction of the shaft.

Mithin ist bei der Handpumpe die Übertragung der Pumpbewegung vom Pumphebel über die Welle auf den Nocken vorgesehen, wobei der Nocken mit dem Pumpkolben des Pumpzylinders zusammenwirkt. Der für den Fachmann in Kenntnis des Standes der Technik nicht vorhersehbare Kern der vorliegenden Erfindung besteht nun darin, den Pumpkolben kraftschlüssig über mindestens ein eine Achse aufweisendes Gelenk mit dem Nocken zu verbinden. Durch eine derartige Achse wird eine dauerhafte und zuverlässige kraftschlüssige Verbindung zwischen dem Nocken und dem Pumpkolben insbesondere dann gewährleistet, wenn die Achse in eine Bohrung des Nockens eingepasst ist und wenn die Achse in eine Bohrung des Pumpkolbens eingreift. Es ist also in Abweichung vom Stand der Technik erfindungsgemäss ein sich lang erstreckender Pumpkolben für den Pumpzylinder ohne eine daran und an dem Nocken gesondert zu befestigende Pumpkolbenstange vorgesehen. Das freie Ende des Pumpkolbens ist über das Gelenk mit dem Nocken verbunden. Es entfallen somit die gesonderte Pumpkolbenstange und deren Befestigung sowohl an dem Pumpkolben als auch an dem Nocken.Thus, in the case of the hand pump, the transmission of the pumping movement from the pumping lever to the cam is provided via the shaft, the cam interacting with the pumping piston of the pumping cylinder. The core of the present invention which can not be foreseen by the person skilled in the art in accordance with the prior art now consists of frictionally engaging the pumping piston at least one joint having an axis to connect with the cam. By such an axle a permanent and reliable frictional connection between the cam and the pump piston is particularly ensured when the axis is fitted into a bore of the cam and when the axis engages in a bore of the pump piston. Thus, in deviation from the prior art, according to the invention, a pump piston extending for a long time is provided for the pump cylinder without a pump piston rod to be fastened thereto separately and on the cam. The free end of the pump piston is connected via the joint with the cam. It thus eliminates the separate pump piston rod and its attachment to both the pump piston and the cam.

Hierdurch ist die Handpumpe nicht nur einfach und kostengünstig herstellbar, sondern weist infolge der Anordnung des Gelenks zum kraftschlüssigen Zusammenwirken des Pumpkolbens mit dem Nocken auch eine geringere Anzahl funktioneller Teile auf, so daß sich die Handpumpe gemäss der vorliegenden Erfindung durch eine signifikant reduzierte Störanfälligkeit auszeichnet.As a result, the hand pump is not only simple and inexpensive to produce, but has due to the arrangement of the joint for frictional interaction of the pump piston with the cam on a smaller number of functional parts, so that the hand pump according to the present invention is characterized by a significantly reduced susceptibility.

Weitere Ausgetaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further developments and developments of the invention are characterized in the subclaims.

Weitere Ausgestaltungen, Merkmale und Vorteile der vorliegenden Erfindung werden nachstehend anhand der Figuren 1 bis 4 beschrieben, durch die in exemplarischer Form zwei Ausführungsbeispiele der Handpumpe veranschaulicht sind. Hierin zeigt:

Figur 1
ein erstes Ausführungsbeispiel einer Handpumpe gemäss der vorliegenden Erfindung in einer schematischen Querschnittansicht;
Figur 2
die Handpumpe aus Figur 1 in einer schematischen Schnittansicht entlang der Schnittlinie II - II in Figur 1;
Figur 3
ein zweites Ausführungsbeispiel einer Handpumpe gemäss der vorliegenden Erfindung in einer schematischen Querschnittansicht; und
Figur 4
die Handpumpe aus Figur 3 in einer schematischen Schnittansicht entlang der Schnittlinie IV - IV in Figur 3.
Further embodiments, features and advantages of the present invention will be described below with reference to Figures 1 to 4, are illustrated by the exemplary embodiment of two embodiments of the hand pump. Hereby shows:
FIG. 1
a first embodiment of a Hand pump according to the present invention in a schematic cross-sectional view;
FIG. 2
the hand pump of Figure 1 in a schematic sectional view along the section line II - II in Figure 1;
FIG. 3
a second embodiment of a hand pump according to the present invention in a schematic cross-sectional view; and
FIG. 4
the hand pump of Figure 3 in a schematic sectional view taken along section line IV - IV in Figure 3.

Identische Bezugszeichen beziehen sich auf gleich oder ähnlich ausgebildete Elemente oder Merkmale in den Figuren 1 bis 4.Identical reference signs refer to the same or similar formed elements or features in Figures 1 to 4.

In Figur 1 ist ein erstes Ausführungsbeispiel einer Handpumpe gemäss der vorliegenden Erfindung in einer schematischen Querschnittansicht gezeigt. Bei dieser Handpumpe erfolgt eine Übertragung der Pumpbewegung von einem Pumphebel 10 über eine Welle 20 auf einen Nocken 30, wobei der Nocken 30 mit einem Pumpkolben 50 eines Pumpzylinders 60 zusammenwirkt.1 shows a first embodiment of a hand pump according to the present invention is shown in a schematic cross-sectional view. In this hand pump, the pump movement is transmitted from a pump lever 10 via a shaft 20 to a cam 30, wherein the cam 30 cooperates with a pump piston 50 of a pump cylinder 60.

Hierzu ist der Pumpkolben 50 kraftschlüssig über ein als Achse ausgebildetes Gelenk 40 mit dem Nocken 30 verbunden. Im Detail ist der von der rotierenden Welle 20 bewegte Nocken 30 mit der im wesentlichen parallel zur Welle 20 verlaufenden Achse 40 versehen, die in eine daran angepaßte Bohrung 510 des Pumpzylinders 60 eingreift, so daß bei einer oszillierenden Hin- und Herbewegung des von der Welle 20 bewegten Nockens 30 und der daran in einer Bohrung 310 des Nockens 30 befestigten Achse 40 eine hin und her erfolgende Hubbewegung des Pumpkolbens 50 des Pumpzylinders 60 bewirkt ist.For this purpose, the pump piston 50 is frictionally connected via a joint 40 designed as an axle with the cam 30. In detail, the cam 30 moved by the rotary shaft 20 is provided with the axis 40 substantially parallel to the shaft 20, which engages a bore 510 of the pumping cylinder 60 adapted thereto, so that with an oscillating reciprocating motion of the shaft 20 moving cam 30 and attached thereto in a bore 310 of the cam 30 axis 40 a reciprocating stroke movement of the pump piston 50 of the pumping cylinder 60 is effected.

Infolge des Eingriffs der Achse 40 in die Bohrung 510 am Pumpkolben 50 des Pumpzylinders 60 ergibt sich neben der Hubbewegung eine dieser Hubbewegung überlagerte leichte Kippbewegung (wie in den Figuren 1 und 2 gestrichelt dargestellt, wobei Figur 2 eine schematische Schnittansicht der Handpumpe aus Figur 1 entlang der Schnittlinie II - II in Figur 1 wiedergibt), was aber bei den für die im ersten Ausführungsbeispiel veranschaulichte Handpumpe üblichen Hublängen unschädlich ist.As a result of the engagement of the axis 40 in the bore 510 on the pump piston 50 of the pump cylinder 60 results in addition to the lifting movement of a lifting movement superimposed slight tilting movement (as shown by dashed lines in Figures 1 and 2, wherein Figure 2 is a schematic sectional view of the hand pump of Figure 1 along the section line II - II in Figure 1 reproduces), but this is harmless in the usual for the hand pump illustrated in the first embodiment stroke lengths.

Der Pumpkolben 50 paßt mit großem Spiel in den betreffenden Pumpzylinder 60, wobei die Dichtigkeit durch zwei stark in radialer Richtung vorstehende, elastisch nachgiebige Kolbendichtungen 70, 80 bewirkt ist. Diese Dichtungen 70, 80 erlauben es, daß der Pumpkolben 50 bei seiner Hubbewegung infolge der kraftschlüssigen Anlenkung an die Achse 40 eine leichte Kippbewegung ausführen kann, ohne daß zugleich die Dichtigkeit des Pumpkolbens 50 im Pumpzylinder 60 beeinträchtigt ist.The pump piston 50 fits with great play in the relevant pump cylinder 60, wherein the tightness is effected by two strongly projecting in the radial direction, elastically yielding piston seals 70, 80. These seals 70, 80 allow the pumping piston 50 can perform a slight tilting movement during its stroke due to the non-positive articulation on the axis 40, without at the same time the tightness of the pump piston 50 is impaired in the pumping cylinder 60.

Da der Pumpkolben 50 infolge der durch die Achse 40 vermittelten kraftschlüssigen Anlenkung an den Nocken 30 nicht nur in den Pumpzylinder 60 hinein bewegt, sondern auch aus dem Pumpzylinder 60 heraus bewegt wird, kann ein zusätzliches Rückstellglied, beispielsweise eine Feder, entfallen.Since the pump piston 50 is not only moved into the pump cylinder 60 as a result of mediated by the axis 40 non-positive articulation on the cam 30, but is also moved out of the pumping cylinder 60, an additional return member, such as a spring omitted.

In Figur 3 ist ein zweites Ausführungsbeispiel einer Handpumpe gemäss der vorliegenden Erfindung in einer schematischen Querschnittansicht gezeigt, wobei Figur 4 eine schematische Schnittansicht der Handpumpe aus Figur 3 entlang der Schnittlinie IV - IV in Figur 3 wiedergibt.FIG. 3 shows a second embodiment of a hand pump according to the present invention in one embodiment 4 shows a schematic sectional view of the hand pump from FIG. 3 along the section line IV - IV in FIG. 3.

Die Handpumpe gemäss dem zweiten Ausführungsbeispiel unterscheidet sich von der in den Figuren 1 und 2 dargestellten Handpumpe gemäss dem ersten Ausführungsbeispiel im wesentlichen dadurch, daß der Pumpzylinder 60 mit dem Pumpkolben 50 vom Pumphebel 10 aus gesehen nicht dem Nocken 30 rückgelagert ist, sondern vielmehr dem Nocken 30 vorgelagert ist.The hand pump according to the second embodiment differs from the hand pump according to the first embodiment shown in Figures 1 and 2 essentially in that the pump cylinder 60 with the pump piston 50 seen from the pump lever 10 is not back-mounted cam 30, but rather the cam 30 is upstream.

Da das in den Figuren 3 und 4 veranschaulichte zweite Ausführungsbeispiel ansonsten dem in den Figuren 1 und 2 veranschaulichten ersten Ausführungsbeispiel in Funktion und in Gestaltung im wesentlichen entspricht, wird an dieser Stelle zur Vermeidung unnötiger Wiederholungen auf die vorstehenden Erläuterungen zum ersten Ausführungsbeispiel verwiesen.Since the second embodiment illustrated in FIGS. 3 and 4 otherwise substantially corresponds in function and design to the first embodiment illustrated in FIGS. 1 and 2, reference is made at this juncture to the foregoing explanations of the first embodiment in order to avoid unnecessary repetition.

Die weiteren, in den Figuren 1 bis 4 angedeuteten Elemente oder Merkmale der Handpumpe gemäss der vorliegenden Erfindung entsprechen im wesentlichen den Elementen oder Merkmalen, wie sie bei konventionellen Handpumpen aus dem Stand der Technik bekannt und geläufig sind, so daß sich diesbezügliche Erläuterungen erübrigen.The other, indicated in Figures 1 to 4 elements or features of the hand pump according to the present invention substantially correspond to the elements or features as they are known and familiar in conventional hand pumps of the prior art, so that explanations in this respect unnecessary.

Im Ergebnis weist die Lösung gemäss den beiden in den Figuren 1 bis 4 illustrierten Ausführungsbeispielen eine geringere Anzahl an Komponenten auf und ist infolgedessen preiswerter und auch einfacher montierbar. Auch ist eine geringere Anzahl an die Funktion potentiell beeinträchtigenden Bauteilen vorhanden, insbesondere keine gegeneinander reibenden Teile wie beim Stand der Technik, so daß sich ein Höchstmaß an Funktionssicherheit ergibt.As a result, the solution according to the two embodiments illustrated in FIGS. 1 to 4 has a smaller number of components and as a result is cheaper and also easier to assemble. Also, there is a smaller number of components potentially affecting the function present, especially no rubbing against each other parts as in the prior art, so that there is a maximum of reliability.

Abschließend sei noch darauf hingewiesen, daß der Bewegungsweg des leicht kippenden Pumpkolbens 50 des Pumpzylinders 60 bei seiner Hubbewegung in den Figuren 1 bis 4 durch gestrichelte Linien angedeutet ist.Finally, it should be noted that the movement path of the slightly tilting pump piston 50 of the pumping cylinder 60 is indicated in its lifting movement in Figures 1 to 4 by dashed lines.

Auch sind die zwei vorstehend beschriebenen, in Nuten 90 am Umfang des Pumpkolbens 50 eingesetzten umlaufenden Dichtungen 70, 80 deutlich ersichtlich, die über den Mantel des Pumpkolbens 50 vorspringen und mithin dessen Kippbewegung zulassen.Also, the two above-described, used in grooves 90 on the circumference of the pump piston 50 circumferential seals 70, 80 are clearly visible that project beyond the jacket of the pump piston 50 and thus allow its tilting movement.

Claims (6)

  1. Manual pump, in which the pumping action of a pump lever (10) is transferred via a shaft (20) to a cam (30), wherein the cam (30) cooperates with a pump piston (50) of a pump cylinder (60), wherein the pump piston (50) is connected to the cam (30) in a non-positive manner via at least one articulated joint (40), wherein the pump piston (50) of the pump cylinder (60) provides a large play and wherein the pump piston (50) provides at least one resilient seal (70, 80), which at least accommodates this play,
    characterised in that
    the articulated joint (40) is arranged at the free end of the pump piston (50) associated with the cam (30), the one-piece pump piston being formed as a cylinder, and that the articulated joint between the cam (30) and the pump piston (50) is formed by means of an axle (40) fitted into a borehole (310) of the cam (30) and engaging in a borehole (510) of the pump piston (50), the axle running essentially parallel to the axial direction of the shaft (20).
  2. Manual pump according to claim 1,
    characterised in that
    the axle (40) is designed in the form of a pin.
  3. Manual pump according to any one of claims 1 to 2,
    characterised in that
    the seal (70, 80) is inserted into a circumferential groove (90) of the pump piston (50).
  4. Manual pump according to any one of claims 1 to 3,
    characterised in that
    the seal (70, 80) projects and/or protrudes in the radial direction.
  5. Manual pump according to any one of claims 1 to 4,
    characterised in that
    the seal (70, 80) is arranged at the end of the pump piston (50) disposed opposite to the free end of the pump piston (50).
  6. Manual pump according to any one of claims 1 to 5,
    characterised in that
    two circumferential seals (70, 80) disposed at a distance from one another are provided.
EP19990108348 1998-04-28 1999-04-28 Manual pump Expired - Lifetime EP0953763B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29807533U DE29807533U1 (en) 1998-04-28 1998-04-28 Hand pump
DE29807533U 1998-04-28

Publications (3)

Publication Number Publication Date
EP0953763A2 EP0953763A2 (en) 1999-11-03
EP0953763A3 EP0953763A3 (en) 2000-08-16
EP0953763B1 true EP0953763B1 (en) 2006-06-21

Family

ID=8056321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990108348 Expired - Lifetime EP0953763B1 (en) 1998-04-28 1999-04-28 Manual pump

Country Status (2)

Country Link
EP (1) EP0953763B1 (en)
DE (3) DE29807533U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3121445A1 (en) 2015-07-22 2017-01-25 Weber-Hydraulik GmbH Hydraulic pump

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB610541A (en) * 1945-11-15 1948-10-18 Messier Aircraft Equipment Ltd Improvements in or relating to variable-stroke pumps
DE812281C (en) * 1949-06-10 1951-08-27 Flensburger Pumpenfabrik Heinr Double-acting piston pump for hand drive
GB926961A (en) * 1959-07-10 1963-05-22 Pass & Co Ltd E Improvements in or relating to hydraulic pumps
DE1845696U (en) 1961-09-28 1962-01-25 Georg Horndasch PISTON PUMP FOR MANUAL OPERATION.
DE1254966B (en) 1964-06-16 1967-11-23 Eugen Schlenker & Co O H G Piston pump operated by hand lever
DE3112733C2 (en) 1981-03-31 1984-02-02 Pierburg Gmbh & Co Kg, 4040 Neuss Pump for conveying gases or liquids
DE8127508U1 (en) * 1981-09-19 1982-02-11 Elektro-Thermit Gmbh, 4300 Essen MANUAL HYDRAULIC PUMP
FR2566053A1 (en) 1983-12-09 1985-12-20 Albin Alexis Manual hydraulic pump with variable rate of flow and inlet torque, controlled by the force applied by the user
DE9414875U1 (en) * 1994-09-13 1996-01-25 Aldinger Heinz Dipl Ing Fh Hydraulic hand pump, in particular for tipping vehicle cabins

Also Published As

Publication number Publication date
EP0953763A2 (en) 1999-11-03
EP0953763A3 (en) 2000-08-16
DE29807533U1 (en) 1998-09-24
DE59913577D1 (en) 2006-08-03
DE29906713U1 (en) 1999-10-28

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