CN116576102A

CN116576102A - Pump device with coupling for driving device

Info

Publication number: CN116576102A
Application number: CN202310098939.5A
Authority: CN
Inventors: M·森德尔巴赫; A·古恩德尔; R·许特尔
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2022-02-10
Filing date: 2023-02-08
Publication date: 2023-08-11
Also published as: DE102022201368A1

Abstract

The present disclosure relates to a pump apparatus having: a pump housing, at which two fluid connections are provided, and at which a pump-side housing coupling section is provided, which is configured to be connectable in a torque-transmitting manner with a drive-side housing coupling section of a drive device; an input shaft for driving the pump device for the optional transfer of fluid from the first fluid connection to the second fluid connection or vice versa, wherein the free end of the input shaft forms a pump-side shaft coupling section which is configured for being connectable in a torque-transmitting manner with a drive-side shaft coupling section of an output shaft of the drive device; and a pump-side locking section which is formed at the pump housing and is configured for engaging the locking element in an undercut manner or for supporting the locking element in such a way that the locking element can be moved between an open position and a closed position.

Description

Pump device with coupling for driving device

Technical Field

The present disclosure relates to a pump apparatus having an input shaft that is coupleable with an output shaft of a drive apparatus, and a pump system having a pump apparatus and a drive apparatus.

Background

For example, for hydraulic assemblies, appliances are known from the prior art having a fixedly mounted drive and a hydraulic pump driven by the drive, wherein the shaft of the pump is coupled to the drive. However, these appliances are compatible with the specific use purpose and cannot be flexibly used.

EP 3,222,179 A1 discloses a pump with a rotatable control shaft end, which is provided with an axial coupling, and a drill screw (Bohrschrauber), which can be connected in a driving manner to the axial coupling. The counter moment or support of the pump is achieved here by the connection to the hydraulic reservoir and by its friction at the bottom. The counter moment or support of the drill-type screwing machine is achieved by the hand of the user or operator and by its friction at the bottom. The disadvantage is that the rotational movement of the hydraulic unit and the pump must be achieved by friction at the bottom and the operator must apply a counter moment with his hand. In the case of large rotational torques or long operating times, the drill screwing machine may no longer be able to be held.

Furthermore, EP 3 434 A1, EP 3 638 A1, EP 1 157 786 A1, EP 2 427 273 A1 and EP 2 533 955 A1 disclose in summary appliances, such as, for example, rescue shears or hydraulic spreaders, which are either supplied from the mains or have a battery for supplying power and are provided, for example, with integrated hydraulic pumps, control devices and, if appropriate, hydraulic cylinders for driving specific mechanical devices. These appliances contain at least one electric motor and a hydraulic pump and, if necessary, also control equipment (e.g. valves) and hydraulic cylinders. However, it is disadvantageous here that these appliances always have hydraulic pumps, so that they cannot be used for other purposes, for example as a drill-type screwing machine, and are therefore limited in terms of their application possibilities.

From DE 198 12 A1, a manually operated tool is also known, which has a jaw attachment with a container, a cylinder for actuating the jaws and an integrated hydraulic pump which is designed to pump fluid from the container into the cylinder. However, this clip attachment is designed for special purposes and cannot be flexibly adapted to different uses. Furthermore, the pump is forcibly designed to provide an oscillating fluid flow that can be pumped in a single direction.

Disclosure of Invention

The object of the present application is to provide a pump device which obviates the disadvantages of the prior art. The pump device should in particular be able to be used particularly simply and flexibly.

This object is achieved by a pump device and a pump system according to the independent claims.

Further advantageous embodiments are the subject matter of the dependent claims.

More precisely, this object is achieved by a pump device having a pump housing, at which a first fluid connection and a second fluid connection for connecting a fluid line (for example a hose-type or pipe-type line or a line integrated in a hydraulic block) are provided, and at which a pump-side housing coupling section is integrally formed or fitted, which is configured for being connectable in a torque-transmitting manner with a drive-side housing coupling section of a drive device. The pump device further has an input shaft configured for driving the pump device for selectively delivering fluid from the first fluid connection to the second fluid connection or vice versa. The free end of the input shaft, which preferably protrudes from the pump housing, forms a pump-side shaft coupling section which is configured to be connectable to a drive-side shaft coupling section of an output shaft of the drive device in a manner that transmits a rotational torque. The pump device furthermore has a pump-side locking section which is formed at the pump housing and is configured for engaging the locking element in an undercut manner or for supporting the locking element in such a way that it can be moved between an open position, in which the pump device and the drive device can be disconnected or connected to each other, and a closed position, in which the pump device and the drive device cannot be connected or disconnected.

Such a pump device can be coupled and uncoupled in an advantageous manner simply, quickly and without tools to the drive device. This can be achieved, for example, using a conventional drive device, such as a drill screw, which can be used in addition to the pump device together with a conventional attachment, such as, for example, a drill chuck. Furthermore, a plurality of different sizes and types of pump devices can be provided, thereby further increasing the number of applicable possibilities by means of a modular concept. Furthermore, it is possible, in particular by coupling to the drive device both of the housing and also of the input shaft, to support the counter torque generated in response to the drive torque applied via the input shaft directly by the drive device. The pump device can thus furthermore be operated ergonomically and in a labor-saving manner by means of a hand-held drive device and can be used particularly flexibly. Since the pump device of the present application can be driven in two directions, the number of applicable possibilities can be further increased.

The pump device can be, for example, an external or internal gear pump, a vane pump, an axial or radial piston pump, a ring gear pump, a rotary pump or a screw pump. The first fluid connection and the second fluid connection (pump connection) can be, for example, a suction connection and a pressure connection or both pressure connections, for example, in order to transport oil from a tank into a hydraulic tank or to move a separate hydraulic cylinder.

Preferably, the pump-side shaft coupling section is configured to provide a form fit (alternatively also a friction fit) with a further shaft coupling section of the shaft coupling section, in particular the drive-side shaft coupling section (directly or via an adapter). In particular, one of the shaft coupling sections is configured as a profiled shaft section (profilwellenbschnitt) or as a form-fitting receptacle for the profiled shaft section, which preferably has a hexagonal profile, more preferably a 1/4 inch hexagonal profile. Furthermore, it is preferred that the pump-side housing coupling section is configured for providing a form fit (or alternatively a friction fit) with the drive-side housing coupling section (directly or via an adapter) and forms an engagement structure, in particular an axial toothing, which is preferably oriented in the axial direction. This enables a particularly simple, cost-effective and reliable connection between the respective coupling sections. It is advantageous to couple with standardized Bit receptacles (Bit-Aufnahme).

It is further preferred that the pump-side locking section and/or the pump-side housing coupling section can be arranged concentrically to the input shaft. In particular, the pump-side shaft coupling section, which is configured as a profiled shaft section, can provide axial guidance for positioning the pump-side housing coupling section relative to the drive-side housing coupling section. Thus, the risk of jamming of the coupling section can be avoided or at least reduced.

It is further preferred that the pump-side locking section can form part of a bayonet closure. This is a particularly simple, quick and tool-free way of handling the locking possibility. The locking section provides, in particular, a radial and axial fixation of the drive housing and the pump housing. The bayonet closure can, if appropriate, assume the function of coupling the two housings in a torque-transmitting manner with the same rotational torque direction at all times.

Suitably, the pump device is a hydraulic pump device, in particular a continuously fed pump device. It is thus possible to provide a particularly uniform fluid flow which has no oscillations of its flow speed and/or its fluid pressure or only a slight oscillations of its flow speed and/or its fluid pressure. The pump device can accordingly be adapted to a particularly wide variety of application possibilities and can be used flexibly. It is furthermore advantageous if the input shaft can be driven in two rotational directions, wherein the rotational direction of the input shaft determines the conveying direction of the pump device. This is a particularly simple possibility to control and switch the direction of transport of the pump between the first fluid connection and the second fluid connection.

Preferably, the pump device has at least one attachment module which is detachably or coupleable to the first fluid connection and/or to the second fluid connection and which provides additional hydraulic components, in particular valves and/or filters. The flexibility of application of the pump device can thus be further increased. Advantageously, the at least one attachment module can furthermore be coupled to the pump housing. In particular, a set of add-on modules can provide different functionalities to provide a particularly wide variety of application possibilities based on a modular system.

The at least one attachment module can, for example, have a control block with a valve configured to limit the fluid pressure of the fluid delivered by the pump device. Alternatively or additionally, at least one of the attachment modules can have a hydraulic filter for filtering the fluid fed through the pump device. Alternatively or additionally, at least one add-on module can have a hydraulic cylinder and a (further) control block with a valve, which is connected to the first fluid connection and/or the second fluid connection for being driven by the pump, wherein the (further) control block is configured for controlling the fluid flow to and/or from the hydraulic cylinder.

Such a filling module can, for example, provide for the use of a pump device as a filling unit in such a way that: the suction line of the pump sucks hydraulic oil from the reservoir by means of a hose and delivers the hydraulic oil via a filter fitted in the pressure line to the reservoir of the hydraulic unit. Furthermore, such an add-on module can, for example, provide the following uses of the pump device: for directly moving hydraulic cylinders, for configuring a viable hydraulic control to fill a self-sufficient closed hydraulic system (such as, for example, a servo hydraulic shaft), or for de-aerating hydraulic fluid.

Alternatively or additionally, the part of the pump device that is free of the add-on, that is to say the pump housing, can optionally have a control block with valve technology for carrying out further hydraulic functions (such as, for example, pressure limiting and/or hydraulic filtration), in order to use the unit, for example, as a filling pump for a hydraulic tank; and/or have a control block with valve technology equipment and a hydraulic cylinder, for example as a self-sufficient electrostatic unit, in order to move a mechanical load.

The object is furthermore achieved by a pump system having a pump device as described above and a (in particular electrical) drive device which is configured for driving the pump device. The drive device has a drive housing which accommodates a drive, preferably an electric motor, and a control unit for controlling the drive. Furthermore, a drive-side housing coupling section is integrally formed or mounted on the drive housing, which is configured for being connectable to a pump-side housing coupling section of the pump device in a manner that transmits a rotational torque. The drive device furthermore has an output shaft which is connected to the drive in order to be able to be driven by this drive. The output shaft has a free end, which forms a drive-side shaft coupling section which is configured for being connectable to a pump-side shaft coupling section of an input shaft of the pump device in a manner that transmits a rotational torque. In particular, the free end of the output shaft protrudes from the drive housing. The drive device further has a drive-side locking section which is formed at the drive housing and is configured for engaging the locking element in an undercut manner or for supporting the locking element in such a way that it can be moved between an open position, in which the pump device and the drive device can be disconnected or connected to each other, and a closed position, in which the pump device and the drive device cannot be connected or disconnected. In particular, the locking element is mounted movably (on the drive side or on the pump side) on one of the locking sections and is designed for engagement with the other of the locking sections in an undercut manner.

Preferably, the electric drive device is a manual drill-type screwing machine, which further preferably has a battery as an energy source for driving the output shaft. This also makes it possible to use the pump particularly simply by amateur operators for flexible application possibilities. Furthermore, the pump system is particularly inexpensive in this way.

For a particularly simple and labor-saving use, the electrical drive device can have a switch for activating the drive, which can be stopped in particular in the activated position. In order to operate the pump device, the output shaft of the drive device, preferably the drive, can be driven in both rotational directions.

Preferably, the drive device has a mechanism for rotational torque limitation, which can preferably be set for setting and changing the rotational torque to be limited. In this way, the pump device and/or the devices connected thereto and/or the at least one add-on module can be protected from damage due to excessive fluid pressure. In this case, an additional valve structure or other protection means of the pump device is not necessary, so that the pump system can be implemented particularly simply and cost-effectively.

It is further preferred that the pump system has an interface, which is a unit provided separately from the drive device and the pump device, with a computing unit and a radio module, in particular a bluetooth module. It is thereby possible to control the drive device and/or to read out the pump parameters for further processing and/or recording by means of a particularly well-known control unit. In particular, it is therefore particularly simple for the user to operate the drive in a particularly accurate and precisely reproducible manner.

For this purpose, it is particularly advantageous if the pump system has a memory unit which stores drive characteristics for driving the electric motor, in particular for setting a defined fluid volume and/or delivery rate provided by the pump device, and provides them to the control unit. Such a drive feature can be provided, for example, for delivering a predefined oil volume and subsequently switching off the pump device. The storage unit is preferably provided at the pump device and/or at least one add-on module and/or at the interface. It is particularly preferred that the drive feature is adaptable to at least one add-on module. In particular, the interface is configured for communication with the control unit for selectively setting the drive characteristics. Thus, the driving of the pump system can be optimized and automated for the respective use, for example, and thus the risk in terms of fault conditions is minimized. Alternatively, the respectively used add-on module and/or the pump device can be configured to recognize the respectively used add-on module and to forward the respective information to the computing unit, in order to design the use of the pump device with different add-on modules in a particularly simple manner.

The interface is preferably configured to receive data of the electrical drive device, to calculate the pump parameters from the data and to output them on the display device. Thus, the user obtains feedback about the current pump parameters, in particular in real time, and has the following possibilities: the pump parameters are adapted if necessary and can be stored or recorded.

Drawings

In which preferred embodiments are shown. Wherein:

FIG. 1 shows a schematic diagram of a pump system according to the present disclosure;

FIG. 2 illustrates a preferred embodiment of a pump system according to the present disclosure in a coupled state;

FIG. 3 shows a perspective view of the preferred embodiment in a disassembled state;

fig. 4 shows a longitudinal cross-section of a coupling according to the inventive subject matter of this preferred embodiment;

fig. 5 schematically illustrates another preferred embodiment of a pump system according to the present disclosure.

Detailed Description

Fig. 1 shows a schematic diagram of a pump system according to the present disclosure. The pump system has a pump device 1, which pump device 1 can be connected to an electrical drive device 2 via a coupling K, optionally without tools. The pump device 1 has a pump housing 3, at which pump housing 3 at least one first fluid connection 4 and a second fluid connection 5 are formed, the first fluid connection 4 and the second fluid connection 5 being configured as pump inputs and/or pump outputs and being configured in particular for connecting fluid lines. The pump device 1 has a pump mechanism 6, which pump mechanism 6 is arranged in fluid connection between the first fluid connection 4 and the second fluid connection 5 and is configured for the optional transfer of fluid from the first fluid connection 4 to the second fluid connection 5 or vice versa.

The pump device 1 is driven by an input shaft 7. The input shaft 7 has a free end which protrudes from the pump housing 3 and forms a pump-side shaft coupling section 8. The pump-side shaft coupling section 8 is designed for a friction-locking or form-locking connection with the drive-side shaft coupling section 9 of the output shaft 10 of the drive device 2, for example in the form of a shaped shaft section, such as a hexagonal shaped part adapted to a drill head receptacle. The drive device 2 has a drive housing 11, in which drive housing 11 an electric motor 12 is received, which electric motor 12 is connected to an output shaft 10 in order to drive this output shaft 10. The free end of the output shaft 10 protrudes from the drive housing 11 and forms the drive-side shaft coupling section 9.

Furthermore, a pump-side housing coupling section 13, which is arranged concentrically to the input shaft 7, is fitted to the pump housing 3 or is formed integrally therewith. The pump-side housing coupling section 13 is designed for a friction-locking or form-locking connection with the drive-side housing coupling section 14, for example in the form of an axial toothing, which is mounted on or integrally formed with the drive housing 11 of the drive device 2.

The pump housing 3 furthermore forms a pump-side locking section 15, and the drive housing 11 forms a drive-side locking section 16 (also referred to as locking sections 15, 16). The locking element 17 is mounted movably at one side on one of the locking sections 15, 16 and is provided at the other side with an engagement element configured for engagement into an undercut of the respective other locking section of the locking sections 15, 16. The locking element is movable between an open position in which the locking element 17 is disengaged from the undercut and a closed position in which the locking element 17 engages into the undercut and prevents the connection between the pump device 1 and the drive device 2 from being disengaged. The shaft coupling sections 8, 9, the housing coupling sections 13, 14 and the locking sections 15, 16 together form a coupling K.

Fig. 2 and 3 show a preferred embodiment of the pump system according to the present disclosure in a coupled state (fig. 2) in which the pump device 1 and the drive device 2 are coupled to each other and in a disassembled state (fig. 3) in which the pump device 1 and the drive device 2 are decoupled and the coupling K is disassembled from the pump housing 3. The drive device 2 is a manual drill-type screwing machine with a battery 18, a handle 19 and a drive section 20, the drive section 20 having an electric motor 12 and an output shaft 10. A control switch 21 for steplessly controlling the electric motor 12 and, if necessary, a switch 22 for switching the rotational direction of the electric motor 12 are provided at the handle 19.

In fig. 3, it can be seen in particular that the pump-side shaft coupling section 8 forms a hexagonal molding and the drive-side shaft coupling section 9 forms an adapted hexagonal receptacle. Furthermore, the pump-side housing coupling section 13 and the drive-side housing coupling section 14 form an axial toothing, which is designed for engagement with one another. In this embodiment, the pump-side locking section 15 supports the locking element 17. The locking element 17 forms a sleeve from which the first projection extends radially inwards. The locking section 16 of the drive side is provided by a flange from which extends radially outwards, the second projections being arranged such that they can engage between and behind the first projections in order to provide a bayonet connection.

Furthermore, fig. 3 discloses an interface 23, for example in the form of a tablet or the like, which is configured for controlling the electric motor 12 and/or for analyzing pump parameters. The interface 23 and the drive device 2 each have a bluetooth module in order to communicate with each other in order to exchange control commands for controlling the electric motor 12 or the pump device 1 and/or operating parameters of the electric motor 12 or the pump device 1. The interface 23 has an input device via which a user can input to control the electric motor 12 or the pump device 1, and a display device on which pump parameters, such as, for example, the flow rate and/or the fluid pressure of the pump device 1, can be displayed. The computing unit of the interface 23 is provided for transmitting user inputs to the drive device 2 and for ascertaining pump parameters based on the operating parameters of the electric motor 12.

Fig. 4 shows a longitudinal section through the coupling K. The input shaft 7 and the output shaft 10 are arranged centrally, with their free ends respectively protruding from the pump housing 3 of the pump device 1 or the drive housing 11 of the drive device 2, so as to be coupled via the drive-side shaft coupling section 9 and the pump-side shaft coupling section 8. A pump-side connection sleeve is arranged concentrically to the input shaft 7, which is fastened to the pump housing 3 by means of a pin. The pump-side connecting sleeve forms, on its end facing the drive device 2, an axial toothing as a pump-side housing coupling section 13. The pump-side housing coupling section 13 engages with an axial toothing which forms a drive-side housing coupling section 14 and is formed by a drive-side connecting sleeve which is fastened to the drive housing 11.

Furthermore, the pump-side connection sleeve supports a bayonet mount 25 at its radially outer side. The bayonet mount 25 supports a bayonet socket which forms the pump-side locking section 15 in the form of a radially inwardly projecting projection. The radially inwardly projecting projection intersects a radially outwardly projecting projection of the drive-side connecting sleeve, which radially outwardly projecting projection provides a drive-side locking section 16 for providing axial and radial positioning of the drive housing 11 and the pump housing 3 relative to each other. The outer circumferential surface of the drive-side connecting sleeve forms a centering surface 24 for centering against the bayonet sleeve. A sleeve-shaped locking element 17 is rotatably mounted outside the bayonet sleeve. If the pump-side locking section 15 and the drive-side locking section 16 intersect one another and the locking element 17 is in the locking position, the pump-side locking section 15 and the drive-side locking section 16 are fixed in their positions relative to one another, so that their intersection does not disengage and the coupling K is locked. If the locking element 17 is rotated from the locking position into the open position, the pump-side locking section 15 and the drive-side locking section 16 can then be twisted relative to one another in order to disengage them and to disconnect the coupling K or in order to be able to separate the pump device 1 from the drive device 2.

Fig. 5 schematically shows the configuration of the drive device 2 and of the pump device 1 coupled to the drive device 2 by means of the coupling K, the pump device 1 being equipped with different attachment modules 26. The attachment module 26 is connected to the first or second fluid connection 4, 5, respectively, and is fastened in particular to the pump housing 3. A first embodiment for the add-on module 26 is shown illustratively on the left side, wherein control valves and/or fluid filters are provided. A second exemplary embodiment for the attachment module 26 is further shown on the right, which furthermore has a hydraulic cylinder 27 and supports this hydraulic cylinder 27 in a displaceable manner in order to provide a hydraulic actuator.

List of reference numerals

1. Pump device

2. Driving apparatus

3. Pump housing

4. First fluid joint

5. Second fluid joint

6. Pump mechanism

7. Input shaft

8. Pump-side shaft coupling section

9. Drive-side shaft coupling section

10. Output shaft

11. Driving shell

12. Driver/electric motor

13. Pump-side housing coupling section

14. Drive-side housing coupling section

15. Pump-side locking section

16. Drive-side locking section

17. Locking element

18. Storage battery

19. Handle

20. Drive section

21. Operating switch

22. Switching device

23. Interface

24. Centering surface

25. Bayonet support

26. Attachment piece

27. Hydraulic cylinder

K coupling.

Claims

1. A pump device (1) having:

-a pump housing (3), at which pump housing (3) a first fluid connection (4) and a second fluid connection (5) for connecting a fluid line are provided, and-a pump-side housing coupling section (13) is integrally formed or fitted at the pump housing (3), the pump-side housing coupling section (13) being configured for being connectable in a torque-transmitting manner with a drive-side housing coupling section (14) of a drive device (2);

-an input shaft (7), the input shaft (7) being configured for driving the pump device (1) for the optional transfer of fluid from the first fluid connection (4) to the second fluid connection (5) or vice versa, wherein a free end of the input shaft (7) constitutes a pump-side shaft coupling section (8), the pump-side shaft coupling section (8) being configured for being connectable in a torque-transmitting manner with a drive-side shaft coupling section (9) of an output shaft (10) of the drive device (2); and

-a pump-side locking section (15), the pump-side locking section (15) being configured at the pump housing (3), and the pump-side locking section (15) being configured for engaging with a locking element (17) in an undercut manner or for supporting the locking element (17) in such a way that the locking element (17) can be moved between an open position, in which the pump device (1) and the drive device (2) can be disconnected or connected to each other, and a closed position, in which the pump device (1) and the drive device (2) cannot be connected or disconnected from each other.

2. Pump device (1) according to claim 1, wherein,

the pump-side shaft coupling section (8) is configured for providing a form-locking with the drive-side shaft coupling section (9), and is in particular configured as a profiled shaft section, preferably a hexagon, further preferably a 1/4 inch hexagon, and

the pump-side housing coupling section (13) is configured to provide a form-fit with the drive-side housing coupling section (14) and preferably forms an axial toothing.

3. Pump device (1) according to claim 1 or 2, wherein the pump-side locking section (15) and/or the pump-side housing coupling section (13) are arranged concentrically with the input shaft (7), and in particular the pump-side locking section (15) forms part of a bayonet closure.

4. A pump device (1) according to any one of claims 1 to 3, wherein the pump device (1) is a hydraulic pump device, in particular a continuously fed pump device, the input shaft (7) of which can be driven in two rotational directions, wherein the rotational direction of the input shaft (7) determines the feed direction of the pump device (1).

5. A pump device (1) according to any one of claims 1 to 3, wherein the pump device (1) has at least one add-on module (26) which is detachably coupled or coupleable with the first fluid connection (4) and/or the second fluid connection (5) and provides additional hydraulic components, in particular valves and/or filters.

6. Pump system having a pump device (1) according to any of the preceding claims and a drive device (2), the drive device (2) being configured for driving the pump device (1), wherein the drive device (2) has the following:

-a drive housing (11), which drive housing (11) accommodates a drive (12), in particular an electric motor, and a control unit for controlling the drive (12), and-a drive-side housing coupling section (14) is integrally formed or fitted at the drive housing (11), which drive-side housing coupling section (14) is configured for being connectable in a torque-transmitting manner with a pump-side housing coupling section (13) of the pump device (1);

an output shaft (10), which output shaft (10) is connected to the drive (12) so as to be drivable by this drive (12) and has a free end which forms a drive-side shaft coupling section (9), the drive-side shaft coupling section (9) being configured for being connectable in a torque-transmitting manner with a pump-side shaft coupling section (8) of an input shaft (7) of the pump device (1); and

-a drive-side locking section (16), the drive-side locking section (16) being configured at the drive housing (11), and the drive-side locking section (16) being configured for engaging the locking element (17) in an undercut manner or for supporting the locking element (17) such that the locking element can be moved between an open position, in which the pump device (1) and the drive device (2) can be disconnected or connected to each other, and a closed position, in which the pump device (1) and the drive device (2) cannot be connected or disconnected from each other.

7. Pump system according to claim 6, wherein the drive device (2) is a manual drill-type screwing machine and preferably has a battery (18), the battery (18) serving as an energy source for driving the output shaft (10).

8. Pump system according to claim 6 or 7, wherein the drive device (2) has a rotational torque limiting mechanism which can be set preferably for setting a rotational torque to be limited.

9. Pump system according to any one of claims 6 to 8, further having an interface (23), the interface (23) being a unit provided separately from the drive device (2) and the pump device (1), having a computing unit and a radio module, in particular a bluetooth module.

10. Pump system according to any one of claims 6 to 9, further having a memory unit which stores and provides drive characteristics for driving the drive (12), in particular for setting a defined fluid volume and/or delivery rate provided by the pump device (1), to the control unit.