WO2011113469A2

WO2011113469A2 - Metering pump

Info

Publication number: WO2011113469A2
Application number: PCT/EP2010/053264
Authority: WO
Inventors: René Schweri
Original assignee: Diener Ag Precision Machining
Priority date: 2010-03-15
Filing date: 2010-03-15
Publication date: 2011-09-22
Also published as: WO2011113469A3

Abstract

The invention relates to a metering pump (1) comprising a base part (2), a drive shaft (11) that can be rotated relative to the base part (2), a pivoting part (9) that can be pivoted relative to the base part (2), a cylinder (3) with a cylinder axis (Z), said cylinder lying on the pivoting part (9), and at least one piston (10) which is movably mounted in the cylinder (3) and which is connected to the drive shaft (11) in an articulated manner. The pivoting part (9) can be moved relative to the base part (2) such that the orientation of the cylinder (3) relative to the base part (2) and/or the position of the cylinder (3) relative to the base part (2), in particular the angle (α) between the cylinder axis (Z) and the drive shaft (11), can be adjusted. According to the invention, the cylinder (3) is removably connected to or can be connected to the pivoting part (9), and/or the pivoting part (9) is removably connected to or can be connected to the base part (2).

Description

PDIEN005 O / I b .03.2010 1 PDIEN005 O-2010007816

metering

The present invention relates to a metering pump according to the preamble of independent claim 1. Such Do ^¬ sierpumpen be used in particular for the precise dosing of fluids.

A generic metering pump is for example in WO

93/15316. This metering pump includes a base part and a drive shaft rotatable relative thereto. Furthermore, it contains a pivoting part, which is pivotable relative to the base part by means of a joint. On the pivot part, a cylinder is arranged, in which a piston is mounted both axially and rotatably movable. On the lateral surface of the cylinder, a fluid inlet opening and a fluid outlet opening are arranged. By means of a joint, the piston can be displaced via the drive shaft into a combined axial and rotary movement.

At the end of the piston chamfering is provided. This is formed ^¬ the way that the combined axial and rotational movement of the piston allows a periodic recording of a fluid through the fluid inlet opening and discharging the fluid through the fluid outlet opening. The angle between the drive shaft and the cylinder axis determines the flow rate delivered during one cycle, ie during one complete revolution of the drive shaft. This angle can be adjusted by means of an adjusting screw.

This known from the prior art metering pump has ever ^¬ but a number of disadvantages. For example, it is very difficult to ^¬ due to the described therein connection of the pivoting part to the base part and due to the arrangement of the adjusting screw to clean the interior of the cylinder or replace the cylinder. In addition, the pivot joint is spaced from the drive shaft, which causes the cylinder only PDIEN005 O / I b .03.2010 2 PDIEN005 O-2010007816 in one direction. This is z. B. nachtei ^¬ lig when the metering pump is to be used in limited space. Furthermore, the open articulated coupling of motor and piston pump in the case of a humid environment is undesirable, for example, because there liquids can get into the joint. In addition, at high ambient light, the signals of the sensor described in WO 93/15316 can be erroneously interpreted in ^¬ indicating the angular position of the piston.

Moreover, the specific design of the edging metering pump to a summation of component tolerances, which may adversely affect the delivery accuracy, insbesonde ^¬ re leads within a series production.

It is therefore an object of the present invention to provide a metering pump in which the disadvantages known in the prior art are overcome. In particular, therefore, a metering pump is to be provided in the interior of the Zylin ^¬ DERS is more accessible and therefore easier to clean.

These and other objects are achieved by a metering pump having the features of patent claim 1. The metering pump contains a base part and a drive shaft that can ^rotate relative to the base part. Furthermore, the metering pump has a pivotable relative to the base part pivot member on which a cylinder is arranged with a cylinder axis. In the cylinder at least one be ^¬ movably mounted and pivotally connected to the drive shaft piston received or receivable. In this case, the pivoting part is movable relative to the base part such that the orientation of the cylinder relative to the base part and / or the position of the cylinder is adjustable relative to the base part. In particular, this makes it possible to adjust the angle between the cylinder axis and the drive shaft.

The orientation of the cylinder is understood here and below to mean the angular position of the cylinder, which is defined by three PDIEN005 O / I b .03.2010 3 PDIEN005 O-2010007816 independent rotation angle. Under the position of the cylinder, the spatial position of a beliebi ^¬ gene but fixed point of the cylinder will be further understood in space (for example, its center of gravity); this position can be given by three Cartesian coordinates of this point.

By varying the orientation and / or the position of the cylinder, the flow rate per cycle, ie rotation of the drive shaft ^¬ can be varied. In particular, the delivery rate per cycle can be varied by changing the angle between the cylinder axis and the drive shaft.

According to the invention, the cylinder with the pivoting part and / or the pivoting part with the base part is detachably connected or ver ^¬ bindable. Due to this inventive configuration, the cylinder can be separated from the pivoting part and / or the

Swivel part to be separated from the base part. Overall, here ^¬ can be separated by the cylinder from the base part, whereby the interior of the cylinder is more easily accessible and can be cleaned. In addition, due to the solubility of any seals the metering pump can be replaced easily.

The piston is pivotally connected by means of a transmission with the drive shaft to ^¬ , wherein the piston is displaceable in a simultaneous axial and rotational movement within the cylinder. The cylinder, in particular the lateral surface of the cylinder, has at least two fluid openings for receiving and / or dispensing a fluid. At the end of the piston there is provided a chamfering which is adapted to allow the combined axial and rotational movement of the piston to periodically pick up a fluid through a fluid port and deliver the fluid through a fluid port.

In some embodiments, the cylinder may be detachably connected or connectable to the pivoting member while the pivoting member PDIEN005 O / I b .03.2010 4 PDIEN005 O-2010007816 part is rigidly connected to the base part. In other embodiments, the pivoting member may be detachably connected or connectable to the base member while the cylinder is engaged with the base member

Pivoting part is rigidly connected.

In some embodiments, the cylinder is connected or connectable to the pivot member by means of a releasable threaded connection. Preferably, this screw connection is tool-free operable ^¬ tigbar. It can then be released by hand, so that the cylinder can be particularly easily separated from the pivoting part and again ^¬ connected with it.

Preferably, the metering pump has an adjusting part, by means of which the direction of the cylinder axis relative to the base part and / or the position of the cylinder relative to the base part is jus ^¬ tierbar. Specifically included angle may be adjustable by means of the adjusting of the interim ^¬ rule the cylinder axis and the drive shaft.

In preferred embodiments, a specific direction of the cylinder axis relative to the base part and / or a specific position of the cylinder relative to the base part, in particular a certain included between the cylinder axis and the drive shaft angle, associated with a unique position and / or orientation of the adjusting part relative to the base part.

In preferred embodiments, however, the adjusting part is movable relative to the pivoting part. That way that can

Swiveling part and the cylinder arranged thereon are moved indirectly through the adjusting part. In particular, the adjusting part can be designed and arranged such that there is a reduction between the movement of the adjusting part and the movement of the cylinder axis. As a result, the direction of the cylinder axis can be set particularly precisely. PDIEN005 O / I b .03.2010 5 PDIEN005 O-2010007816

Preferably, the adjusting part encloses at least a part of the piston and / or the drive shaft and / or a transmission connecting the piston to the drive shaft. In particular, the adjusting part may be formed substantially annular. Due to this construction, the adjusting portion may have a relative large actuating surface on the one hand, where it is operable at ^¬ play with one hand. A large ^¬ Actuate the transfer area can be easily grasped and enable precise ^¬ A adjustability of the adjusting. On the other hand made it ^¬ light enclosing the arrangement that the adjusting part and in particular its actuating surface are integrally ^¬ arranged relatively close to the piston and / or at the drive shaft and / or in the transmission, resulting in a smaller overall size.

In preferred embodiments, the adjusting part is rotatable about an adjusting axis relative to the base part. Such Drehbe ^¬ movement is structurally simple to implement and space-saving, for example, compared to a linear movement. Particularly preferably, the alignment axis is inclined to the drive shaft. In the presence of an inclination, the position of the cylinder and / or the direction of the cylinder axis can be adjusted by rotation. In preferred embodiments, the area enclosed by the adjustment axis and the drive shaft angular Hoechsmann ^¬ least 30 °, preferably at most 20 °, particularly preferably at most 15 °. Also preferably, this angle is at least 5 °, more preferably at least 8 °, particularly preferably at least 10 °.

In some possible embodiments, the cylinder may be arranged offset parallel to the alignment axis. Upon rotation of the adjusting part about the adjusting axis then the La ^¬ ge of the cylinder axis changes relative to the drive shaft. As a result, the delivery rate of the fluid per cycle can be adjusted.

In preferred embodiments, the adjustment part has first conductive means, in particular at least one first conductive surface. PDIEN005 O / I b .03.2010 6 PDIEN005 O-2010007816

Furthermore, the base part preferably has first counter-guide means, in particular at least one first counter-guide surface. In particular, this first counter-guide surface can be arranged substantially cylin- ^¬- symmetrically, in particular around the adjustment axis. Here and below, a surface is referred to as cylindrically symmetric about an axis, when the rotation of the surface by an arbitrary angle about this axis, the surface is reflected on itself. For example, the first counter-guide surface could be cylindrical, conical, spherical or planar and annular. The adjusting part is preferably rotatable about the adjusting axis by guiding the first guiding means along the first counter-guiding means relative to the base part.

Preferably, the adjusting member is movable relative to the cylinder ge superimposed ^¬, in particular mounted rotatably. In particular, the adjusting may be mounted around the cylinder axis rotatable relative to the Zy ^¬ linder. The direction of the cylinder axis relative to the base part and / or the position of the cylinder relative to the base ^¬ part can then be adjusted indirectly by movement of the adjusting ^¬ . As a result, for example, a reduction between the movement of the adjusting part and the movement of the cylinder can be achieved. Thus, the direction of the cylinder axis can be adjusted based on the direction of the drive shaft who ^¬ .

In one embodiment, the metering pump is designed such that the cylinder axis can be aligned substantially parallel to the Antriebswel ^¬ le. In such a variant, it is possible to set the angle between the cylinder axis and drive shaft virtually arbitrarily small, so that in principle arbitrarily small amounts of fluid can be conveyed.

Preferably, the adjusting section on second guide means, insbeson ^¬ particular at least one second guide surface. Further preferably, the pivoting part on second counter-guiding means, in particular PDIEN005 O / I b .03.2010 7 PDIEN005 O-2010007816 at least one second counterface. The swing member may be rotatably re ^¬ tively to the adjusting part and about the cylinder axis by guiding the second Gegenleitmittel along the second guide means. In this way, the movement of the adjusting part can be performed relative to the pivoting part and thus also relative to the cylinder.

In a preferred embodiment, surround the second Gegenleitmittel, in particular the second Gegenleitflache, at ^¬ least a portion of the piston and / or the drive shaft and / or of the piston connected with the drive shaft gear. In this way, the pivoting part can be particularly well supported at the adjusting part from ^¬.

Further preferably, the second Gegenleitmittel, insbeson ^¬ particular, the second Gegenleitflache arranged zylindersymmet ^¬ manner about the cylindrical axis substantially. As a result, the cylinder is equally supported in all directions perpendicular to the cylinder axis.

In preferred embodiments, the first guide surface is rotatable relative to the base part. This defines a first imaginary axis of rotation of the adjustment. If the first guide surface is cylindrically symmetric about an axis, then this axis of symmetry forms the first imaginary axis of rotation. Further, if the second routing ^¬ surface is rotatable relative to the cylinder, this defines a second imaginary axis of rotation of the adjusting. When the second guide surface is cylindrically symmetric about an axis, the axis of symmetry ^¬ se forms the second imaginary axis of rotation. With installed metering pump, the first imaginary axis of rotation of the adjusting with the adjustment axis coincides, while the second imaginary pivot axis of the adjusting ^¬ coincides with the cylinder axis.

Preferably, the first imaginary axis of rotation is inclined to the second imaginary axis of rotation, in particular by an angle which is at most 30 °, preferably at most 20 °, particularly preferably at most 15 ° PDIEN005 O / I b .03.2010 8 PDIEN005 O-2010007816. Also preferably, this angle is at least 5 °, more preferably at least 8 °, particularly preferably at least 10 °. This angle defines the angle between the cylinder axis and the alignment axis. As a result, the cylinder axis can be pivoted upon rotation of the adjusting part about the adjusting axis around, whereby the angle between the cylinder axis and the drive shaft and consequently the flow rate per cycle can ^¬ be turned.

In advantageous embodiments, the cylinder axis intersects the plane defined by the drive shaft drive shaft in Minim ^¬ least one orientation and / or position of the cylinder relative to the base part. Particularly preferably, the cylinder axis intersects the drive shaft defined by the drive shaft in each orientation and / or position of the cylinder relative to the base part.

Preferably, the adjusting member is formed so that the cylinder is pivotable about a fixed pivot point, which ent ^¬ the intersection between the drive axle and cylinder axis. In addition, when the angle between the drive axis and the first imaginary axis of rotation with the angle between the first imaginary rotational axis and the second imaginary axis of rotation coincides (ie when the angle ß, and γ according to the exporting ^¬ approximately examples match) and the cylinder axis coincides with the second imaginary axis of rotation Adjusting matches, this leads to the fact that the cylinder axis can be aligned with the drive axis. In this position, there is no promotion of the fluid.

Also preferably, the base part comprises first guide means, in particular at least one first guide surface, and the pivot part comprises second guide means, in particular at least one second guide surface. The swivel part can by leadership PDIEN005 O / I b .03.2010 9 PDIEN005 O-2010007816 the second guide means along the first guide means to the base part to be re ^¬ tively rotatable.

Advantageously, the first guide means in at least one cutting plane, in particular in each cutting plane, kreisbogenför ^¬ mig and have at least one of the cutting planes a radius. Also preferably the second guide means are at least ^¬ a section plane, in particular in any plane of section of a circular arc and have in at least one of the cutting planes about the same radius. This embodiment of the guide means, in particular the guide surfaces, facilitates the Drehwebung of the pivot member relative to the base part and ge ^¬ ensures precise positioning and / or orientation of the cylinder.

Preferably, the first guide surface and / or the second Füh ^¬ approximate surface at least partly substantially spherical. Al ^¬ ternatively or additionally, the first guide surface

and / or the second guide surface at least partially cylindrical We ^¬ sentlichen. As a result, a particularly secure guidance of the pivoting part is achieved relative to the base part. Having the first guide surface and / or the second guide surface Kgs ^¬ NEN concave and / or convex portions.

Thus, a well defined flow rate is transported at a certain adjustment of the adjustment body and into ^¬ particular at a certain direction of the cylinder axis, must be matched to the fluid ports of the cylinder with respect to each direction of the cylinder axis, the axial movement of the plunger to the rotational movement of the piston. For this purpose, it is especially before ^¬ geous if the base part has at least one first Führungsein ^¬ direction and the pivot member comprises at least a second guide device. In this case, the second guide means with the first guide means to be engaged or brought in such a way that the angular position of the cylinder to PDIEN005 O / I b .03.2010 10 PDIEN005 O-2010007816 the cylinder axis around is determined by the engagement of the first guide device with the second guide device. This angular position remains even after the release of the cylinder

Swiveling part and / or the pivoting part of the base part (example ^¬ example for cleaning purposes) and re-connection unchanged.

In a preferred embodiment, the first guide device is designed as at least one guide pin, and the second guide device is designed as at least one curved path, wherein the guide pin is in engagement with the curved path ^¬ and in particular in the curved path is feasible. In preferred embodiments, the guide pin is arranged on the first guide surface of the base part, and the curved path is arranged on the second guide surface of the pivoting part. In this way, the angular position of the cylinder can be set around the cylinder ^¬ axis particularly simple.

The first guide means and the second guide means allow the movement of the piston to allow delivery of the fluid at each orientation of the cylinder axis.

With particular advantage, the second guide means has at least two cam tracks with which the guide pin selectively ^¬ example is engageable, and in particular the fact is feasible. Preferably, a first cam track and a second cure ^¬ venbahn are mirror-symmetrical to each other. Thereby, the cylinder can be pivoted in one direction or in the other direction, by using the one or the other cam track, the angular position of the cylinder still remains de ^¬ finiert.

Particularly advantageously, the drive shaft and the piston are at least ^¬ in the region of their articulated connection and at least one, preferably at all adjustable angles between the cylinder axis and the drive shaft in a cavity ange- ange¬. PDIEN005 O / I b .03.2010 11 PDIEN005 O-2010007816 files. In some embodiments, the cavity may be substantially closed. In this way, the area of the articulated connection can be protected from environmental influences, which makes the metering pump particularly low maintenance and also increases its service life. For example, due to the at ^¬ order in a substantially closed cavity no contaminants, such as fluids penetrate into this area.

More preferably, the cavity at least partially from Ba ^¬ sisteil and / or the swiveling part and / or the adjusting part is turned ^¬ closed. This leads to a particularly simple construction, since the components, which contain at least the advantageous embodiments of the metering pump anyway, at the same time serve to enclose the cavity.

Alternatively, it is also conceivable that the cavity is not completely closed. The enclosing the cavity surfaces, in particular surfaces of the base part and / or the swiveling part and / or of the adjusting may have beispielswei ^¬ se openings through which fluids from the cavity or in addition, these can flow into it. This may be useful in cases where liquids should drain in the event of a leak. Of course, the openings may also be formed between the base part, pivoting part and adjusting part.

In the following the invention will be explained in more detail with reference to some embodiments and drawings. Show

1 shows a perspective view of a first exporting ^¬ approximate shape of a metering pump according to the invention;

FIG. 2 shows the embodiment according to FIG. 1 in a side view; PDIEN005 O / I b .03.2010 12 PDIEN005 O-2010007816

FIG. 3 shows the embodiment according to FIG. 1 in a lateral sectional view;

FIG. 4 shows the embodiment according to FIG. 1 in an exploded view,

Figure 5 shows the embodiment according to Figure 1 in a side view, wherein the cylinder axis is directed in a second direction;

FIG. 6 shows that contained in the embodiment according to FIG

Base part in a perspective view;

FIG. 7 shows that contained in the embodiment according to FIG

Pivoting part in a first perspective view;

FIG. 8 shows that contained in the embodiment according to FIG

Pivoting part in a second perspective view;

FIG. 9 which contains the embodiment according to FIG

Adjusting part in a first perspective view;

FIG. 10 which contains the embodiment according to FIG

Adjusting part in a second perspective view;

11 shows a second embodiment of an inventive

Dosing pump with a first Feinj ustierteil in egg ^¬ ner perspective view;

FIG. 12 shows the embodiment according to FIG. 11 in a further view; PDIEN005 O / I b .03.2010 13 PDIEN005 O-2010007816

13 shows a third embodiment of an inventive

Dosing pump with a second Feinj ustierteil in egg ^¬ ner perspective view;

FIG. 14 shows the embodiment according to FIG. 13 in a further view;

Figure 15 shows a fourth embodiment of an inventive

Metering pump in a perspective sectional view;

16 shows a fifth embodiment of an inventive

Dosing pump in a perspective view;

17 shows an exploded view of the fifth embodiment of the metering pump according to FIG. 16.

FIG. 1 shows a perspective view of a first embodiment of a metering pump 1 ^{according to the} invention. The metering pump has a base part 2, a support plate 44, a Jus ^¬ tierteil 4 and a cylinder 3 with a first fluid port 5 and a second fluid port 6. In Figure 2, the same metering pump 1 is shown in a side view.

FIG. 3 shows a sectional view through the metering pump 1 according to FIGS. 1 and 2 through a center plane parallel to the drawing plane of FIG. 2. The base part 2 contains a drive shaft 11, which is rotatable relative to the base part 2 by means of a drive motor 26. At the end of the drive shaft 11, a driver 22 is attached. The driver 22 has an opening which is spaced from the drive shaft 11 defined by the drive shaft A. In the opening, an insert 42 is inserted, in which a joint ball 23 is held with a cylindrical bore 35. In the bore 35 a relative to the ball joint 23 displaceable pin 24 is inserted. With the pin 24, a piston 10 is rigidly connected. The piston 10 is in a in PDIEN005 O / I b .03.2010 14 PDIEN005 O-2010007816

Cylinder 3 arranged cylindrical insert 43 mounted both axially and rotatably. The piston 10 is surrounded by two seals 52 and an O-ring 53. The driver 22, the ball joint 23 and the pin 24 thus form a transmission which connects the Kol ^¬ ben 10 pivotally connected to the drive shaft 11.

Upon rotation of the drive shaft 11 by the drive motor 26 of the driver 22 is set in a rotational movement about the drive axis A. By means of the joint ball 23 and the pin 24, the piston 10 is set in a rotational movement about a cylinder axis Z of the cylinder 3 around. Due to the angle between the drive axis A and the cylinder axis Z, the piston 10 ei ^¬ ne simultaneous axial movement in the cylinder 3 from.

The driver 22 has a non-cylindrically symmetrical extension 45 in the radial direction. By means of a sensor 46, the rotational position of the driver 22 and thus the Drehgeschwin ^¬ speed of the drive shaft 11 and consequently also the Förderge ^¬ speed of the fluid can be determined.

The piston 10 has at one end a chamfer 25, which is designed such that the combined axial and Drehbe ^¬ movement of the piston 10 allows a periodic recording of a fluid through the first fluid port and discharging the fluid through the second fluid port.

The drive shaft 11, the driver 42, the ball joint 23, the pin 24 and a large part of the piston 10 are arranged in a closed cavity 51 ^¬ . This cavity 51 is enclosed by the support plate 44, the base part 2, the pivot part 9 and the adjusting part 4. In this way, the articulated connection can be protected from environmental influences, which makes the metering pump 1 particularly low maintenance and also their life ^¬ he increased. PDIEN005 O / I b .03.2010 15 PDIEN005 O-2010007816

The base part 2 has a spherically and convexly formed first guide surface 13 with a radius of 20 mm (see also the detail view in FIG. With the cylinder 3 is a

Pivoting part 9 is connected, which has a second, substantially spherical and concave guide surface 14 with the same radius of 20 mm (sa the detail views in Figures 7 and 8). The pivoting part 9 and the cylinder 3 connected thereto can be pivoted relative to the base part 2 by guiding the second guide surface 14 along the first guide surface 13. Be ^¬ by movement of the pivot part 9 to the base part 2, the angle between the cylinder axis Z and the drive axis A is adjustable, relatively where ^¬ is adjustable by the flow rate of the fluid per cycle.

The base part 2 further has a first ^{Gegenleitfla ¬} surface 16 which is arranged cylindrically symmetric about an alignment axis J around. The adjustment axis J is inclined to the drive ^axis A ^¬ and includes with this an angle ß of 12 °. The adjusting part 4 has on its underside a first guide surface

15 on (see the detail views in Figures 9 and 10). By guiding the first guide surface 15 along the first counterguide surface

16, the adjusting part 4 is rotatable about the adjustment axis J relative to the Ba ^¬ sisteil. 2 To rotate the adjusting part 4 this can be ^¬ he handles, for example, with one hand on an actuating surface 21.

The drive axis A, the adjustment axis J and the cylinder axis Z intersect at a common point of intersection S.

The base part 2 further has in the region of the first ^{Gegenleitflä ¬} che 16 two holes 29, in each of which a retaining ^¬ screw 30 is inserted. With the help of these retaining screws 30, the adjusting part 4 is movably held on the base part 2.

The adjusting part 4 is formed substantially annular and encloses the piston 10 and the transmission, which is the piston PDIEN005 O / I b .03.2010 16 PDIEN005 O-2010007816

, 10 connects with the drive shaft 11 (see also the Detailansich ^¬ th of the adjusting in Figures 9 and 10). It has a second guide surface 17, which is cylindrical. The pivoting part 9 has a connecting piece 27, which contains a second counter- ^guide surface 18, which likewise has a cylindrical ^shape (see also the detail views in FIGS. 7 and 8). As a result of the contact of the second guide surface 17 with the second counterguide surface 18, the swiveling part 9 is rotatable about the cylinder axis Z by guiding the second counterguide surface 18 along the second guide surface 17 relative to the adjusting part 4. The first Leitflä ^¬ che 15 and the second guide surface 17 are angeord ^¬ net such that between the cylinder axis Z and the alignment axis J an angle γ of 12 ° is included.

FIG. 4 shows an exploded view of the metering pump according to FIGS. 1 to 3. The cylinder 3 is connected to the pivoting part 9 by means of a detachable screw connection. For this purpose, the cylinder 3 has a union nut 8 with an internal thread 36. The union nut 8 is held by means of two arranged on the cylinder 3 tabs 31, of which only one is recognizable here. The lower end of the cylinder 3 passes through an opening 28 of the adjusting part 4. The nozzle 27 of the pivoting part 9 has an external thread 7, on which the union nut 8 is screwed. The tabs 31 penetrate into ^{korrespondie ¬} ing grooves 32 of the nozzle 27, of which only one can be seen; This prevents rotation of the cylinder 3 relative to the pivoting part 9.

By loosening the union nut 8 from the nozzle 27, the cylinder 3 is detachable from the pivoting part 9 and can be completely separated from the pivoting part 9 and the base part 2. Thereby, the interior of the cylinder 3 is particularly well accessible, so that a ^¬ fold purification is possible. In particular, this can be the PDIEN005 O / I b .03.2010 17 PDIEN005 O-2010007816

Seals 52 or the O-ring 53 are replaced. Moreover, the cylinder 3 can be completely replaced.

To adjust the flow rate per cycle, the adjusting part 4 is rotated about the adjusting axis J around. In this case, the adjusting part 4 is guided by contact of the first guide surface 15 on the first counter-guide surface 16 of the base part 2. Due to the inclination of the axis of symmetry of the second guide surface 17 of the adjusting part 4 ge ^¬ compared to the axis of symmetry of the first guide surface 15 of Justier ^¬ part 4 and due to the inclination of the axis of symmetry of the first counterguide surface 16 of the base part 2 relative to the drive axis A, the axis of symmetry of the second guide surface 17th pivoted. Due to the contact between the second guide surface 17 of the adjusting part 4 and the second Gegenleitfläche 18 thus also changes the direction of the cylinder axis Z. As a result, the angle between the cylinder axis Z and An ^¬ drive axis A changes, so that ultimately changes the flow rate per cycle ,

FIG. 5 shows the metering pump 1 in a setting in which the cylinder axis Z is directed in a direction which deviates from that shown in FIGS. 1 to 4. This setting shown in FIG. 5 can be achieved from that shown in FIG. 2 by turning the adjusting part 4 about the adjusting axis J relative to the base part 2.

The cylinder axis Z is aligned in Figure 5 parallel to the drive axis A, which corresponds to an angle = 0 °, so that no fluid is conveyed. Such an adjustment is possible because the angle γ between the cylinder axis Z and the adjusting axis J coincides with the angle β between the adjusting axis J and the drive ^¬ axis A. Since the rotation angle of the adjustment body 4 is adjustable around the adjustment axis J about which Zy ^¬ linder axis Z may be an arbitrarily small angle to the arrival PDIEN005 O / I b .03.2010 18 PDIEN005 O-2010007816 drive axis A, so that even small flow rates per cycle can be set.

In each setting of the adjustment body 4 and thus in each direction of the cylinder axis Z, the cylinder axis Z intersects the Antreibsachse in the same intersection point S. In this way, the Zy ^¬ linder axis Z to the drive shaft A can be aligned, as shown in FIG. 5 Moreover, the forces acting on the piston 10 can be better absorbed, which increases the stability. In addition, thereby the conveyed during a cycle flow rate is better reproducible.

Upon rotation of the adjusting part 4 about the adjusting axis J, the cylinder axis Z executes a precision-like movement, which is not in a common plane (in particular not in the plane of Figures 2 and 5). Further, since the cylinder 3 and the pivot member 9 are rotatable relative to the adjusting part 4, this would lead to an indefinite relative phase position between the axial movement of the rotational movement of the cylinder without further precautions. This would result in an undefined flow rate of the fluid.

To counteract this, the base part 2 has a guide pin 19 on the first guide surface 13 (see also FIG. 6). This engages in one of two curved paths 20; 20 ', which are formed in the second guide surface 14 of the pivot member 9 (see also Figures 7 and 8). Due to the engagement Guide # ^¬ approximately pin 19 in one of the cam tracks 20; 20 ', the win ^¬ kellage of the cylinder 3 is set to the cylinder axis Z. Here ^¬ by the subsidized at a cycle amount of fluid is placed firmly ^¬.

The guide pin 19 can optionally in one of the two curves ^¬ tracks 20; 20 'are used. The curved paths 20; 20 'are mirror images of each other. PDIEN005 O / I b .03.2010 19 PDIEN005 O-2010007816

FIG. 6 shows in detail the base part 2 with the first essentially spherical guide surface 13 and the guide pin 19 extending therefrom.

Figures 7 and 8 show the pivot part 9 in two Perspecti ^¬ vischen views. In Figure 7, the nozzle 27 with external thread 36 and the two grooves 32 are shown. In addition, the curved paths 20; 20 'recognizable. In Figure 8, the first substantially spherical guide surface 14 is visible, in which the two cam tracks 20; 20 'are arranged.

In Figures 9 and 10, the adjusting part 4 is shown. The ^¬ ses is formed substantially annular. On the outside of an actuation surface 21 is arranged at it with one hand operable at ^¬ play, that is rotatable. The first guide surface 15 and the second guide surface 17 are arranged zuein ^¬ other that an angle γ of 12 ° between the cylinder axis Z and drive axis A is set (see Figure 3).

Figures 11 and 12 show a second embodiment of a metering pump according to the invention 1. The adjusting part 4 of this Do ^¬ sierpumpe 1 contains in the lower region radially outwardly extending teeth 39. The lower portion of the adjusting part 4 is in the direction of the cylinder 3 of a only in Figure 11 illustrated cover plate 46 covers. The metering pump 1 contains fer ^¬ ne a Feinj ustierteil 33 which is rotatably ^¬ bar relative to the base member 2 and accessible through an opening 47 in the cover plate 46.

In Figure 12, the metering pump is without the cover plate 46 Darge ^¬ presents, so that the Feinj ustierteil 33 is better visible. The Feinj ustierteil 33 has an engagement opening 37 into which a hexagon socket key can be inserted, which are inserted through the opening 47 in the cover plate 46 PDIEN005 O / I b .03.2010 20 PDIEN005 O-2010007816 can. On the outer edge of Feinj ustierteils 33 teeth 38 are arranged ^¬ , which engage in the teeth 39 of the adjusting part 4.

By rotation of the Feinj ustierteils 33, the adjusting part 4 is rotated about the adjusting axis J by means of the Verzah ^¬ tion 38, 39, where ^{¬ as} by the first embodiment, the direction of the cylinder axis Z can be adjusted. Due to the reduction between the rotation of the Feinj ustierteils 33 and the rotation of the adjusting part 4, a much more precise adjustment of Win ^¬ cle between the cylinder axis Z and the drive axis A he ^{¬ be} enough.

Further, the figures 13 and 14 show a third execution ^¬ example of an inventive metering pump 1. In contrast to the first two embodiments, the adjusting part 4 by means of a only in Figure 13 Darge ^¬ set nut 48 rotatably mounted on the base part 2 held at that metering pump. 1 The metering pump 1 further includes an adjusting screw 40 as ^¬ formed Feinj ustierteil.

FIG. 14 shows the third exemplary embodiment according to FIG. 13 without the base part 2 and the union nut 48. The adjusting screw 40 has radially extending teeth 50. The teeth 50 are in engagement with corresponding teeth of the adjusting part 4, which extend on the underside and away from the cylinder 3.

By rotating the adjustment screw 40 by means of the gear tooth ^¬ voltage 50, rotated 49 the adjusting part 4 about the adjustment axis J, where ^¬ the direction of the cylinder axis Z can be set by, as in the first two embodiments. Due to the Unter ^¬ tion between the rotation of the adjusting screw 40 and the rotation of the adjusting part 4, a precise adjustment of Win ^¬ cle between the cylinder axis Z and the drive axis A he ^{¬ be} enough. PDIEN005 O / I b .03.2010 21 PDIEN005 O-2010007816

The individual parts of the metering pump 1, such as the base part 2, the pivoting part 9, the adjusting part 4 and the cylinder 3, may for example consist of plastic, metal or in particular a stainless steel. The parts can be produced, for example, by methods known per se, for example by

Injection molding, sintering, machining or grinding.

15 shows a perspective sectional view of a four ^¬ th embodiment is recognizable.

The metering pump 1 has a base part 2, a pivoting part 9 and a cylinder 3. The cylinder 3 has a first fluid opening 5 and a second fluid opening 6. By means of an over ^¬ throw nut, the cylinder 3 is detachably connected to a nozzle 27, which is rigidly connected to the pivoting part 9.

As in the first three embodiments is located within the cylinder 3, a piston 10 which can perform relative to the cylinder 3 both an axial and a rotational movement. Such a combined axial and rotational movement can be achieved with the aid of a drive shaft 11, a driver 22, a Ge ^¬ steering ball 23 and a pin 24.

In contrast to the first three embodiments, the base part 2 in the fourth embodiment, a first guide surface ^¬ 13, which is cylindrical and concave. In addition, the pivoting part 9 has a second guide surface 14, wel ^¬ che cylindrical and convex. The pivoting part 9 is pivotable by Füh ^¬ tion of the second guide surface 14 along the first guide surface 13 relative to the base part 2 about an axis, wel ^¬ che perpendicular to the sectional plane of the drawing. This rotation allows the setting of an angle between a cylinder axis Z of the cylinder 3 and a defined by the Antriebswel ^¬ le 11 drive shaft A. Thus can also in this PDIEN005 O / I b .03.2010 22 PDIEN005 O-2010007816

Metering pump 1, the delivery rate of the fluid can be set per cycle.

Also in contrast to the first three embodiments, this metering pump 1 contains no adjustment. In this exporting ^¬ approximate shape so the cylinder is pivoted thereof by directly grasping. 3 Alternatively, it is of course also possible to provide, in a modification of this fourth embodiment as an A ^¬ screw with teeth which engage corresponding teeth of the pivoting part. 9 This allows a more precise adjustment of the direction of the cylinder axis Z can be achieved.

FIG. 16 shows a perspective view of a fifth embodiment of a metering pump 1 according to the invention. Like the embodiments according to FIGS. 1 to 14, this metering pump 1 also has a base part 2, a cylinder 3, an adjusting part 4 and a union nut 8. Furthermore, the dossier pump 1 comprises a clamp ring 52. The clamp ring 52 has four latching tabs 55 in a cylinder jacket-shaped region, only two of which can be seen in FIG. 16. With the help of these locking tabs 55 of the clamp ring 52 is latchingly connected to the base part 2. At its upper side, the clamping ring 52 has three openings 56 (see FIG. 17 below), each having a stud screw 54 inserted therein and an opening 47.

FIG. 17 shows an exploded view of the metering pump 1 according to FIG. 16. As can be seen here, the clamping ring 52 has three openings 56 on its upper side, into each of which a stud 54 is inserted. By rotation of the pin ^¬ screws 54 in a fixing direction of the clamp ring 52 is clamped against a pressure ring 53 in the axial direction. The pressure ring 53 is thereby in turn clamped against a flange-like projection 57 on the adjusting part 4. The pressure ring 53 PDIEN005 O / I b .03.2010 23 PDIEN005 O-2010007816 serves for better force distribution. Due to the resulting frictional engagement thereby the adjusting part 4 is fixed relative to the base part 2 in a ^¬ a detected rotational position, whereby unintentional rotation of the adjustment body 4 can be prevented relative to the base part. 2

By turning the stud bolts 54 in a direction opposite to the fixing direction, the axial tension between the clamp ring 52, pressure ring 53 and flange-like projection 57 is released again, so that the adjusting part 4 can subsequently be moved again.

Through the opening 47 of the clamp ring 52 and a recess 58 in the pressure ring 58 through a not shown here tool can be introduced, which is engageable with teeth 39 of the adjusting part 4. For this purpose also, the tool has teeth to the teeth 39 of the adjusting korrespondie ^¬ ren. For example, the tool may comprise a torxähnliches profile. By rotation of the tool, the rotational posi tion of the adjusting ^¬ 4 can be adjusted relative to the base part 2, where ^¬ ustierung by a Feinj is possible. Optionally, the metering pump 1 may also have a fine piece portion 33 as shown in FIG. 12, which is in engagement with the teeth 39 and in which a hexagon socket wrench may be inserted.

Claims

claims

1. metering pump (1) comprising

a base part (2),

a drive shaft (11) rotatable relative to the base part (2),

a pivoting part (9) pivotable relative to the base part (2),

a cylinder (3) arranged on the pivoting part (9) and having a cylinder axis (Z),

- At least one in the cylinder (3) movably mounted and with the drive shaft (11) articulated piston (10),

wherein the pivoting part (9) is movable relative to the base part (2) such that the orientation of the cylinder (3) relative to the base part (2) and / or the position of the cylinder (3) relative to the base part (2), in particular the angle (a) is adjustable between the cylinder axis (Z) and the drive shaft (11),

characterized in that

the cylinder (3) with the pivoting part (9) and / or the pivoting part (9) to the base part (2) releasably connected or connectable.

2. dosing pump (1) according to claim 1,

characterized in that

the cylinder (3) is connected or connectable to the pivoting part (9) by means of a detachable screw connection (7, 36).

3. dosing pump (1) according to one of claims 1 and 2,

marked by

an adjusting part (4), by means of which the direction of the Zylin derachse (Z) relative to the base part (2) and / or the Positi on the cylinder (3) relative to the base part (2), in particular the between the cylinder axis (Z) and the drive shaft (11) included angle (α), is adjustable.

Dosing pump (1) according to claim 3,

characterized in that

a specific direction of the cylinder axis (Z) relative to the base part (2) and / or a specific position of the cylinder (3) relative to the base part (2), in particular a certain angle enclosed between the cylinder axis (Z) and the drive shaft (11) ( α), a unique position and / or orientation of the adjusting part (4) relative to the base part (2) is assigned.

Dosing pump (1), in particular according to one of claims 3 and 4,

full

a base part (2),

a drive shaft (11) rotatable relative to the base part (2),

a pivoting part (9) pivotable relative to the base part (2),

- At least one in the cylinder (3) movably mounted and with the drive shaft (11) articulated verb ^u ndenen piston (10),

- An adjusting part (4), by means of which the direction of the cylinder axis (Z) relative to the base part (2) and / or the position of the cylinder (3) relative to the base part (2), in particular between the cylinder axis (Z) and the drive shaft (11) included angle (α), is adjustable, characterized in that

the adjusting part (4) encloses at least a part of the piston (10) and / or the drive shaft (11) and / or a transmission connecting the piston (10) to the drive shaft (11), in particular being substantially annular.

6. dosing pump (1) according to one of claims 3 to 5,

characterized in that

the adjusting part (4) is rotatable relative to the base part (2) about an adjusting axis (J) inclined in particular to the drive shaft (11).

7. dosing pump (1) according to one of claims 3 to 6,

characterized in that

- The adjusting part (4) first conducting means, in particular

has at least a first guide surface (15);

- The base part (2) first counter-guide means, in particular at least one first counter-guide surface (16), v / mohe are arranged in particular substantially cylindrically symmetric about the alignment axis (J) around; - The adjusting part (4) by guiding the first guide means along the first counter-guide means relative to the base part (2) about the alignment axis (J) is rotatable.

8. dosing pump (1) according to one of claims 3 to 7,

characterized in that

the adjusting part (4) relative to the cylinder (3) movably mounted, in particular rotatably mounted, in particular about the cylinder axis (Z).

9. dosing pump (1) according to claim 8,

characterized in that

the cylinder axis (Z) is inclined to the adjustment axis (J).

Metering pump (1) according to one of claims 3 bis 9, _· characterized in that

- The adjusting part (4) second guide means, in particular at least one second guide surface (17);

- The pivot member (9) second counter-guide means, in particular at least one second counter-guide surface (18);

- The pivoting part (9) relative to the adjusting part (4) and about the cylinder axis (Z) by guiding the second counter-guiding means along the second guide means is rotatable.

Dosing pump (1) according to claim 10,

characterized in that

the second counter-guide means, in particular the second counter-guide surface (18), at least a part of the piston; and / or the drive shaft (11) and / or a transmission connecting the piston (10) to the drive shaft (11) - shut down .

Dosing pump (1) according to one of claims 10 and 11, characterized in that

the second counter-guide means, in particular the second counter-guide surface (18), are arranged substantially cylindrically symmetric about the cylinder axis (Z).

Dosing pump (1) according to any one of claims 10 to> 12, characterized in that

a first imaginary axis of rotation of the adjusting part (·), which is defined by the rotatability of the adjusting part (4) relative to the base part (2), to a second imaginary axis of rotation of the adjusting part (4), which by the rotation of the cylinder (3) relative to Adjusting part (4) is inclined, in particular by an angle (v) in the loading rich of 5 ° and 30 °, more preferably of 8 ° and 20 °, particularly preferably of 10 ° and 15 °.

14. dosing pump (1) according to one of claims 1 to 13,

characterized in that

the cylinder axis (Z) the drive shaft (A) defined by the drive shaft (11) in at least one orientation and / or position of the cylinder (3) relative to the base part, in particular in each orientation and / or position of the cylinder (3) relative to the base part cuts.

15. dosing pump (1) according to claim 14,

characterized in that

the adjusting part is designed such that the cylinder (3) is pivotable about a fixed pivot point, which corresponds to the intersection point (S) between the drive axle and the cylinder axis.

16. dosing pump (1) according to one of claims 1 to 15,

characterized in that

^• the base part (2) comprises first guide means, in particular at least one first guide face (13), - the pivot part (9) comprises second guide means, in particular at least one second guide face (14 ^' ,

- The pivoting part (9) by guiding the second; Guide means along the first guide means relative to the base part (2) is rotatable.

17. dosing pump (1) according to claim 16,

characterized in that

the first guide means are circular in at least one sectional plane (El), in particular in each slice plane, - The second guide means in at least one cutting plane (E2), in particular in each sectional plane, are circular arc-shaped.

Dosing pump (1) according to claim 17,

characterized in that

the first guide surface (13) and / or the second guide surface (14) is at least partially substantially spherical and / or at least partially substantially cylindrical.

Dosing pump (1) according to one of claims 1 to 18, characterized in that

the base part (2) has at least one first guide device and the swivel part (9) has at least one second guide device which engages or can be brought into engagement with the first guide device such that the angular position of the cylinder (3) about the cylinder axis (Z ) is determined by the engagement of the first guide means with the second guide means such that in each direction of the cylinder axis, a conveying of the fluid is possible.

Dosing pump (1) according to claim 19,

characterized in that

the first guide device is designed as at least one guide pin (19) and the second guide device is designed as at least one curved track (20), wherein the guide pin (19) is in engagement with the curved track (20; 20 ') and in particular in the Curved track ί20, 20 ') is feasible.

Dosing pump (1) according to claim 20,

characterized in that:

the second guide means at least two curved paths (20/20 '), with which the guide pin (19) is selectively engageable and in particular therein is bar.

Dosing pump (1) according to claim 21,

characterized in that

a first curved track (20) and a second curved track (20 'are mirror-symmetrical to each other.

Dosing pump (1) according to one of the preceding claims, characterized in that

the drive shaft (11) and the piston (10) at least in Be rich their articulated connection and at least one preferably at all adjustable angles (a) between the cylinder axis (Z) and the drive shaft (11) in a particular substantially closed cavity. (51) are assigned.

Dosing pump (1) according to claim 23,

characterized in that

the cavity (51) is at least partially enclosed by the base part (2) and / or the pivoting part (9) and / or the adjusting part (4).