WO2016166321A1

WO2016166321A1 - Portable mobile hydraulic pump for hydraulically operated tools

Info

Publication number: WO2016166321A1
Application number: PCT/EP2016/058398
Authority: WO
Inventors: Hans-Günther Gänslein
Original assignee: Werkzeuge Für Die Elektrische Stromverteilung Ug (Haftungsbeschränkt)
Priority date: 2015-04-17
Filing date: 2016-04-15
Publication date: 2016-10-20
Also published as: DE102015207033A1; EP3283765B1; EP3283765A1

Abstract

The invention relates to portable mobile hydraulic pumps for hydraulically operated tools, having a pancake motor connected to a control device and a pot-shaped housing that accommodates the fluid, having connections for at least one tool on the housing and at least one outlet and one inlet and an eccentric having coupled pump elements and channels in the housing. Said hydraulic pumps are characterized by the simple realization thereof. For this purpose, the housing has two connection pieces having the connections for the at least one tool. First channels connect the pressure sides of the pump elements and respective first outputs of the connection pieces. In the connection piece, a second channel connects a second output and a connection for the tool. Furthermore, in the connection piece, a third channel connects a third output and the interior of the housing. The outputs are located at a distance from each other in a plane. Furthermore, at least one function element is arranged.

Description

Portable mobile hydraulic pump for hydraulically operated tools

The invention relates to portable mobile hydraulic pumps for hydraulically operated tools with a disk motor in conjunction with a control device and a cup-shaped fluid receiving housing with connections for at least one tool on the housing and at least one outlet and an inlet and an eccentric with coupled pumping elements and channels in the case.

A portable hydraulic pump is known inter alia by the document DE 295 14 768 U1. In a housing is a pump unit. A trained as a disk motor electric motor drive is arranged outside of the housing. The pressure side of the pump unit is connected via a pressure line to an outlet.

The document DE 295 19 941 U1 describes a hydraulic pump unit, wherein a plurality of pump units are coupled to an electric motor via an eccentric. These components are housed together in a housing. The housing has an inlet and an outlet for the hydraulic medium.

By the document DE 298 02 441 U1 a hydraulic motor pump unit is known. The drive of a pump element by means of a collector motor. The pressure sides of a plurality of pump elements are connected via pressure lines to the outlet of the hydraulic pump.

A mobile hydraulic pump for hydraulically operated tools is disclosed in the publication DE 10 2007 047 757 A1. A pancake motor acts on pump units via a coupled eccentric. The pressure sides of the pump units are connected via channels to an outlet of the hydraulic pump. These channels are part of the housing.

These solutions each show only one output and one input and are limited to the operation of a tool.

The indicated in claim 1 invention has for its object to provide a mobile hydraulic pump for hydraulically operated tools easy and portable.

This object is achieved with the features listed in claim 1. The portable mobile hydraulic pumps for hydraulically operated tools with a pancake motor in conjunction with a control device and a cup-shaped fluid receiving housing with connections for at least one tool on the housing and at least one outlet and an inlet and an eccentric with coupled pumping elements and channels in the housing are characterized in particular by their simple realization.

For this purpose, the housing has two connecting pieces with the connections for the at least one tool. First channels connect the pressure sides of the pumping elements and in each case a first outlet of the connecting piece. In the connector, a second channel connects a second output and a connector for the tool. Furthermore, in the connecting piece, a third channel connects a third outlet and the interior of the housing. The outputs are spaced apart in a plane. In addition, at least one functional element on the plane is arranged so that the outputs are closed or

two outputs connected together and one output closed or two outputs with each other and with a fourth output as part of the

Functional element connected and an outlet closed

are.

The first channels as pressure lines for the hydraulic medium are placed in the housing, so that a compact portable mobile hydraulic pump is present. The compactness continues to lead to a small possible realization. The size is essentially determined by the housing itself and the dimensions of the pancake motor. The interior of the housing is the reservoir for the hydraulic medium, which is connected to the suction sides of the pumping elements. The pumping elements are located at least partially in the hydraulic medium of the interior. The formation of the pressure lines in the housing means that large pressures of the hydraulic medium can be realized even with small dimensions.

The fittings and the functional elements advantageously lead to a universally applicable portable mobile hydraulic pump. These can be easily connected to a tool with a single-acting cylinder, a double-acting cylinder and a cylinder with its own valve. The outputs are arranged in one plane so that simply implemented functional elements can be connected tightly to them. The functional elements advantageously also have at least one flat surface on, which are easily sealed and detachable connected to each other. The solubility is ensured by means of known screw connections.

The pancake motor is coupled or coupleable to a known accumulator as an electrical energy source. The control is carried out by means of the control device, which may be a known data processing system, for example in the form of a known microcomputer.

Mobile and portable means in particular the possibility to carry the hydraulic pump by the user, so that he can use the tool directly on site. The hydraulic pump and the tool can thus be operated independently on site.

Advantageous embodiments of the invention are specified in the claims 2 to 14.

The functional element is according to the embodiment of claim 2 advantageously a closure plate, a circulation plate with at least one line, a pressure relief valve, a pressure relief valve in conjunction with a port, a directional control valve or an adapter. The pressure relief valve may further be connected to a tank and / or the interior of the housing, so that the pressure-increasing excess fluid enters the tank and / or the interior. With such a valve can also be advantageously set the maximum pressure of the fluid to the tool.

The functional element has according to the embodiment of claim 3, a polygonal base. This advantageously leads to the fact that the functional element can be easily placed and fixed in a predetermined and functional position.

The functional element has, according to the embodiment of claim 4 on a square base. Furthermore, the first output, the second output and the third output are arranged in a diagonal of a quadrangle. By turning and fixing, outputs can be connected and terminated.

A housing wall of the pancake motor is according to the embodiment of claim 5, both the lid of the housing and a heat sink of the pancake motor. The height of the hydraulic pump decreases. At the same time that works located in the housing and flowing during operation of the tool fluid heat dissipation and thus as a cooling medium.

The heat sink has according to the embodiment of claim 6 in the housing facing cooling fins, so that an enlarged cooling surface is present.

The shaft of the pancake motor is according to the embodiment of claim 7 at the same time the shaft for the eccentric in coupling with the pumping elements. For a simple operation of the pumping elements is given. This realization leads to a simple and economically cheap to deploy mobile hydraulic pump.

According to the embodiment of claim 8, a pressure measuring device connected to the outlet of the housing is connected to the control device in such a way that the pancake motor is switched off at a predetermined pressure and / or over a period of time substantially increasing pressure. After machining, the corresponding tools are in their final position. The pressure is only increased in the channels and hoses leading to the tools. This leads to a significant increase in pressure, which is indicated in the time-pressure curve by a break point and a significantly increased slope of the corresponding curve. This is used to shut down the disc rotor motor. This is done automatically, so that the use is simplified and a significant overpressure in the leads to the tool is avoided.

The pressure measuring device may also be a pressure sensor. This is in this case connected to the data processing system so that is switched off at a predetermined and adjustable pressure of the pancake motor. An overpressure in the supply lines to the tool is largely avoided.

With the outlet a known pressure booster is connected to the embodiment of claim 9. This can easily be generated with the hydraulic pump, a very high pressure.

According to the embodiment of claim 10, a pressure-limiting valve is coupled to the fourth outlet of the functional element in such a way that, in the event of overpressure, the first channels are connected to the interior of the housing and / or a tank. An overpressure in the supply lines to the tool is avoided. The inlet is connected according to the embodiment of claim 1 1 with at least one tank, wherein the tank is a separately arranged tank or a tank on the housing.

The interior of the housing is connected according to the embodiment of claim 12 via the inlet and a solenoid valve to the tank for hydraulic medium on the housing, which is further interconnected with the control device.

Between the inlet and the tank is located after the embodiment of claim 13, a fluid cooler.

A tool connection and / or the tool has according to the embodiment of claim 14 at least one transponder with tool-specific data. In addition, the terminals of the housing with the control device connected transmitting / receiving devices for electromagnetic waves. The connected tool is recognized and specific operating parameters can be maintained.

An embodiment of the invention is illustrated in principle in the drawings and will be described in more detail below.

Show it:

1 is a portable mobile hydraulic pump,

2 shows a portable mobile hydraulic pump in a sectional view,

3 shows a housing of a portable mobile hydraulic pump with functional elements,

4 connecting pieces,

Fig. 5 connecting piece with functional elements and tank and

Fig. 6 is a portable mobile hydraulic pump with tanks.

A portable mobile hydraulic pump for hydraulically operated tools consists essentially of a pancake motor 1, a control device 25, a cup-shaped fluid receiving housing 2 with pumping elements 8 and fittings 3.

Fig. 1 shows a portable mobile hydraulic pump in a schematic representation. In the portable mobile hydraulic pump, the pancake motor 1 is located on the pot-shaped housing 2. The connection pieces 3 are designed to project laterally, so that the tool connections 4 are freely accessible and functional elements easily on and degradable.

Fig. 2 shows a portable mobile hydraulic pump in a basic sectional view.

The pancake motor 1 is a known electric motor, the rotor being a disk. The latter is a permanent magnet. The coils are fixed and components of the stator. The operation takes place by means of the control device 25 connected to the pancake motor 1.

The pancake motor 1 is located on the cup-shaped housing 2 receiving the fluid. A housing wall 5 of the pancake motor 1 may advantageously be the lid of the housing 2 at the same time. This housing wall 5 serves at the same time for cooling, wherein flowing medium in the housing 2 can be used simultaneously as a coolant. To enlarge the cooling surface, the housing wall 5 facing the interior of the housing 2 may have cooling fins 6.

The cup-shaped housing 1 may advantageously be a cast body. The housing 1 further has connections for at least one tool and in each case at least one outlet 22 and an inlet 23 and an eccentric 7 with coupled pumping elements 8 and channels 9 in the housing 2.

In the housing 2 there are three pumping elements 8 in the form of known piston pumps. The pistons of the pump elements, which are offset with respect to one another in a plane, are coupled to the eccentric 7. The shaft 10 of the disc rotor motor 1 is at the same time the shaft 10 for the eccentric 7, wherein the shaft 10 penetrates the housing wall 5 as a cover of the housing 2. The pumping elements 8 are fixed with pins.

Fig. 3 shows a housing of a portable mobile hydraulic pump in a schematic representation.

The suction sides of the pumping elements 8 are connected to the interior 1 1 of the housing 2. The pressure side of the pump elements 8 are connected via first channels 12 as pressure channels with the first outputs 15 of the connecting pieces 3. The first channels 12 are Components of the housing 2 and are introduced holes, with unnecessary end portions are provided with at least one closure element.

The housing 2 has two connecting pieces 3 with the connections for the at least one tool in each case as a tool connection 4.

In the connecting piece 3 connect a second channel 13 a second output 16 and a connection for the tool and a third channel 14, a third output 17 and the interior 1 1 of the housing 2. The outputs 15, 16, 17 of the connector 3 are spaced apart in a plane to each other. The end of the connecting piece 3 with the three outputs 15, 16, 17 is square-shaped in particular square. The outputs 15, 16, 17 are arranged in a diagonal.

4 shows connecting pieces 3 in a basic representation.

On the ends of the connecting pieces 3a, 3b with the three outputs 15, 16, 17 at least one functional element 18 is arranged so that

the outputs 15, 16, 17 closed or

two outputs connected to each other and one output closed or two outputs with each other and with a fourth output 19 as part of

Functional element 18 is connected and an outlet closed

are.

Thus, for example, the following functions are given:

Function 1 for a tool with a single-acting cylinder

Connector 3a with functional element 18a 15 X 16 X 17 X

Connecting piece 3b with functional element 18b 15 0 16 0 17 X

Function 2 for a tool with double-acting cylinders

Connecting piece 3a with functional element 18a 15 0 16 0 17 X

Connecting piece 3b with functional element 18b 15 0 16 0 17 X Function 3 for a tool with a cylinder with its own valve

Connecting piece 3a with functional element 18a 15 0 16 0 17 X

Connecting piece 3b with functional element 18b 15 X 16 0 17 0

In this case, O stands for open (connection via the functional element 18) and X for closed (with region of the plate as the functional element 18). These functions are only examples. Of course, other functional elements 18 with through holes and / or other connections are not excluded from drilling. Thus, it is easily possible to connect the various tools directly or via the functional elements 18 downstream directional valves with the portable hydraulic pump according to their implementation and function. This can be in particular 3/2 or 2/2-way valves. Of course, a valve or valves can be attached directly as a functional element. The actuation units of the valves are coupled to the control device 25 so that they are actuated according to the respective function. This is a universal and economical use of portable hydraulic pump is given.

FIG. 5 shows a connection piece 3 with functional elements 18 and tank 21 in a basic representation.

The functional element 18 can for this purpose a closure plate, a circulation plate with at least one line for connecting two outputs, a pressure relief valve 20, a pressure relief valve in conjunction with a port, a pressure relief valve in conjunction with a tank 21 for fluid or an adapter. The functional element 18 has a polygonal base, in particular a square base. The bases of the functional element 18 and the end of the connecting piece 3 with the outputs 15, 16, 17 have the same dimensions.

At the fourth output 19 of the functional element 18, a pressure relief valve 20 is coupled so that the first channels 12 are connected to the interior 1 1 of the housing 2 and / or the tank 21 at overpressure.

Fig. 6 shows a portable mobile hydraulic pump with tanks 21 in a schematic representation. With the outlet 22 of the housing 2, a pressure measuring device 24 may be connected, which may further be connected to the control device 25 so that at a predetermined pressure and / or over a period substantially increasing pressure of the pancake motor 1 is turned off. With the outlet 22 and a pressure booster can be connected. Of course, the housing 2 may also have two outlets 22 for each pressure measuring device 24 and a pressure booster.

As an electrical energy source at least for the pancake motor 1 and the control device 25, a battery 26 is advantageously provided.

The inlet 23 of the housing 2 is connected to the at least one tank 21, wherein the tank 21 or the tanks are arranged on the housing 2. Of course, this can also be a separately arranged tank. The interior 1 1 of the housing 2 is connected to the housing 2 via the inlet 23 and a solenoid valve to the tank 21 for hydraulic medium. The solenoid valve is connected to the control device 25, wherein when the pressure builds up to the tool, the solenoid valve is closed.

In one embodiment, located between the inlet 23 and the tank 21 is a fluid cooler.

In a further embodiment, a tool connection and / or the tool has at least one transponder with tool-specific data. The tool terminals 4 of the housing 2 have transmit / receive devices for electromagnetic waves connected to the control device 25.

LIST OF REFERENCE NUMBERS

1 disc rotor motor

2 housings

3 connection piece

4 tool connection

5 housing wall

6 cooling fins

7 eccentrics

8 pump element

9 channel in the housing

10 wave

1 1 interior

12 first channel

13 second channel

14 third channel

15 first exit

16 second output

17 third exit

18 functional element

19 fourth exit

20 pressure relief valve

21 tank

22 outlet

23 inlet

24 pressure measuring device

25 control device

26 battery

Claims

claims

1 . Portable mobile hydraulic pump for hydraulically operated tools with a pancake motor (1) in conjunction with a control device (25) and a potpfigen the fluid receiving housing (2) with connections for at least one tool on the housing (2) and at least one outlet (22 ) and an inlet (23) and an eccentric (7) with coupled pumping elements (8) and channels (9) in the housing (2), characterized

the housing (2) has two connecting pieces (3) with the connections for the at least one tool,

in that first channels (12) connect the pressure sides of the pump elements (8) and in each case a first output (15) of the connection piece (3), that in the connection piece (3) a second channel (13) has a second output (16) and a connection for the tool connects,

a third channel (14) in the connection piece (3) connects a third outlet (17) and the interior space (11) of the housing (2),

that the exits (15, 16, 17) are spaced apart in a plane,

in that at least one functional element (18) is arranged on the plane so that the outputs (15, 16, 17) are closed or two outputs are connected to one another and one output is closed or two outputs with each other and with a fourth output (19) as part of the functional element (18) connected and an outlet are closed.

2. Hydraulic pump according to claim 1, characterized in that the functional element (18) is a closure plate, a circulation plate with at least one line for connecting two exits, a pressure limiting valve (20), a pressure limiting valve in connection with a connection, a directional control valve or an adapter ,

3. Hydraulic pump according to claims 1 and 2, characterized in that the functional element (18) has a polygonal base.

4. Hydraulic pump according to claim 1, characterized in that the functional element (18) has a quadrangular base and that the first output (15), the second output (16) and the third output (17) are arranged in a diagonal of a quadrangle.

5. Hydraulic pump according to claim 1, characterized in that a housing wall (5) of the disc rotor motor (1) both the cover of the housing (2) and a cooling body of the disc rotor motor (1).

6. Hydraulic pump according to claim 5, characterized in that the cooling body in the housing (2) facing cooling fins (6).

7. Hydraulic pump according to claim 1, characterized in that the shaft (10) of the disc rotor motor (1) at the same time the shaft (10) for the eccentric (7) in coupling with the pumping elements (8).

8. A hydraulic pump according to claim 1, characterized in that with the outlet (22) of the housing (2) a pressure measuring device (24) is connected and that the pressure measuring device (24) with the control device (25) is interconnected so that at a predetermined Pressure and / or over a period substantially increasing pressure of the disc rotor motor (1) is switched off.

9. Hydraulic pump according to claim 1, characterized in that with the outlet (22), a pressure booster is connected.

10. A hydraulic pump according to claim 1, characterized in that at the fourth output (19) of the functional element (18) a pressure relief valve (20) is coupled so that at overpressure the first channels (12) with the interior (1 1) of the housing (2) and / or a tank (21) are connected.

1 1. Hydraulic pump according to claim 1, characterized in that the inlet (23) is connected to at least one tank (21), wherein the tank (21) is a separately arranged tank or a tank (21) on the housing (2).

12. A hydraulic pump according to claim 1 1, characterized in that the interior (1 1) of the housing (2) via the inlet (23) and a solenoid valve to the tank (21) for hydraulic medium on the housing (2) is connected and that the solenoid valve is connected to the control device (25).

13. Hydraulic pump according to claims 1 and 1 1, characterized in that between the inlet (23) and the tank (21) is a fluid cooler.

14. Hydraulic pump according to claims 1 and 5, characterized in that a tool connection (4) and / or the tool has at least one transponder with tool-specific data and that the tool connections (4) of the housing (2) connected to the control device (25) Have transmit / receive devices for electromagnetic waves.