EP3840842A1 - Tragbares arbeitsgerät für den portablen einsatz - Google Patents
Tragbares arbeitsgerät für den portablen einsatzInfo
- Publication number
- EP3840842A1 EP3840842A1 EP18815956.0A EP18815956A EP3840842A1 EP 3840842 A1 EP3840842 A1 EP 3840842A1 EP 18815956 A EP18815956 A EP 18815956A EP 3840842 A1 EP3840842 A1 EP 3840842A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool according
- water
- circuit board
- control
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B3/00—Devices or single parts for facilitating escape from buildings or the like, e.g. protection shields, protection screens; Portable devices for preventing smoke penetrating into distinct parts of buildings
- A62B3/005—Rescue tools with forcing action
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/005—Hydraulic driving means
Definitions
- the present application relates to an electromechanical or electrohydraulic working device for portable use, such as a spreading device, cutting device or combination device with cutting and spreading function or a lifting cylinder (or rescue ram).
- a spreading device such as a spreading device, cutting device or combination device with cutting and spreading function or a lifting cylinder (or rescue ram).
- the aforementioned are preferably used for rescue operations.
- Portable, motor-operated, electro-mechanical or electro-hydraulic work tools or rescue tools of the type of interest here that can be carried by an operator are used in a wide variety of applications.
- there are spreaders, cutters or so-called combination devices i.e. Devices with cutting and spreading functions and rescue cylinders, which are used by emergency services (fire brigade), for example, to rescue injured people from accident vehicles or to rescue victims of an earthquake.
- the type of work equipment or rescue equipment is varied.
- electrohydraulically or electromechanically driven tools or rescue devices with, preferably hardened, tool inserts for cutting, spreading or pressing are exposed to extreme high mechanical demands and are subject to a wide variety of environmental influences (heat, cold, moisture) depending on the place of use.
- rescue tools in particular ensure a particularly high level of operational reliability, since rescue operations always have to be carried out quickly and unexpected operational failures can therefore have fatal consequences.
- Printed state of the art G 93 10 597.5 is a battery-operated underwater electrical device in the form of e.g. B. known a pump.
- the underwater electrical device has a watertight tubular housing, into which a housing end part fitted with O-sealing rings inserted in circumferential grooves is pressed.
- the construction is very complex.
- the object of the present invention is to provide an implement which, on the one hand, permits use under water and, on the other hand, can be implemented using simple constructional means.
- the fact that a brushless DC motor is provided as the electric motor, the electronic components of the circuit board are sealed with potting compound to protect against the ingress of water and the connection elements of the control cable are protected against the ingress of water, can be ensured with relatively simple constructive measures that the portable work tool can also be operated when water should penetrate into the interior of the housing. In particular, it is possible to operate the work tool under water if necessary. Compared to a conventional implement, only comparatively minor design changes are necessary to ensure this additional significant functional advantage.
- the implement according to the invention can in particular also be used for rescue purposes, for example in a vehicle surrounded by water, in which people are still present. People can be recovered from a vehicle wreck very quickly with the new implement.
- Either a plug connection or a solder connection can be provided as the connection means for the control cable on the circuit board.
- the solder joint is sealed off from water by encapsulating the solder joint with sealing compound.
- the working device according to the invention allows no protective and / or sealing measures to be provided on the housing of the working device to prevent water from entering the interior of the housing when the housing is immersed in water.
- Such protective or sealing measures are, particularly in the case of complicated housings, constructively often very agile and cost-intensive.
- connection means for connecting a control line, the connection means being protected against the ingress of water.
- the control line itself usually has waterproof insulation.
- Each control line expediently has a correspondingly sealed connection means.
- a part of the respective connection means can be arranged on the circuit board side and preferably also partially embedded there.
- the opposite part of the connection means is on the control line.
- connecting medium it can be a plug-in connection or a plug-in / rotary connection, which by a sealant such. B. is sealed an O-ring.
- the housing cannot include any protective and / or sealing measures to prevent water from entering the interior of the housing when the housing is immersed in water.
- the electronic control and regulating device expediently comprises a display and / or control panel with a further circuit board on which electronic components, which are also encapsulated with casting compound to protect against the entry of water, can be arranged.
- This further circuit board can be connected via a control line described above to the main circuit board which is arranged remotely in the housing.
- the electronic control and regulating device can comprise a sensor with a white circuit board, on which electronic components are also arranged, which are also enclosed with potting compound to protect against the ingress of water.
- This additional circuit board can also be controlled via a prescribed control line or can be connected to the main circuit board which is remotely located in the housing.
- two boards can consist of the same board base material or board base plate equipped with electronic components, one board being defined as a removal area from the other board (remainder of the board base material or board base plate) and the two boards already being assembled as well are connected via a control cable.
- a solder connection can be provided as the connection means for the control cable or control cables.
- the electrical connections for power cables for the energy supply of the electric motor which are at a sufficient distance from one another, which ensures that, in the event that the connections are surrounded by water, the electrical operating conditions of the implement (e.g. E.g. at a nominal voltage of 24 volts) there is no electrical short circuit via the water as the electrical conduction medium.
- the power cables preferably have a total of three strands (three phases).
- a control panel can be provided on the implement.
- This can be a waterproof membrane keyboard d. H. Include film layering.
- a circuit board can be provided in the area or below the control panel or the membrane keyboard. This additional circuit board can also be controlled via a control line as described above, or it can be connected to the main circuit board which is arranged remotely in the housing.
- the front edge of the control panel preferably the membrane keyboard, can preferably also be covered with potting compound.
- the potting compound thus hermetically seals the film layer laterally along the circumference of the control panel.
- a gap that preferably runs completely around the control panel can be provided.
- the gap can be covered on the outside by a projection of the control panel be overlapped. This makes it possible to use the arrangement “overhead Potting compound to be poured, as the protrusion prevents the casting compound from “leaking”.
- an insertion slot is preferably provided with open contact pins therein, which are therefore unprotected from water, for contacting the battery.
- the contact pins are also appropriately spaced from each other, which ensures that in the event that the contact pins are surrounded by water, the above-mentioned. electrical operating conditions of the implement via the water as the electrical conduction medium does not set an electrical short circuit.
- Control lines of the type described can connect the boards to one another.
- a membrane switch can be provided as the on and off switch.
- a potting compound based on PU, epoxy or silicone is preferably used as the potting compound.
- a silicone-based potting compound is particularly suitable when elevated temperatures occur.
- FIG. 1 shows the illustration of an overall view of an example of a working device in the form of an electro-hydraulic, battery-operated cutting device according to the invention
- FIG. 2 shows an example of a hydraulic circuit diagram of the cutting device according to FIG. 1;
- Fig. 3 is a partial sectional view of the housing area of the inventive tool according to FIG. 1;
- Fig. 4 is an enlarged view of area A of Fig. 3;
- FIG. 5 is an enlarged view of area B of FIG. 3;
- FIG. 6 is an enlarged view of area C of FIG. 3;
- Fig. 7 is a perspective view of an example of a board arrangement for use in the present invention.
- Fig. 8 is a plan view of an example of a control panel with a dis play order according to the present invention.
- Reference numeral 1 in Fig. 1 designates an example of a work machine according to the invention in its entirety.
- the implement 1 is an electro-hydraulic, battery-operated cutting device (cut ter).
- the implement 1 comprises a housing 12 in which there is an electric motor 3 in the form of a brushless DC motor, a hydraulic pump 2 and a hydraulic tank 19 with hydraulic fluid 30 (cf. also FIGS. 2 and 3).
- a compensation device for volume compensation of the Hydraulikflüs liquid is provided during the operation of the implement 1. This can be, for example, a flexible membrane or an overall flexible hydraulic tank.
- Attached to the housing 12 is a control panel 25 with a display 14 and an on / off switch 13.
- the operating states can be read from the operator 14 on the display 14.
- An insertion slot 26 for a replaceable battery 18 is provided on the rear of the housing. Instead of the battery, a power supply unit (not shown in FIG. 1) could also be used at this point be inserted.
- the nominal voltage for operating the device is z. B. 24 volts.
- a manually operated hydraulic valve 6 the operator can manually control the direction of the hydraulic flow with the hand on the second handle 16, so that the piston rod is either retracted (with the tool halves 35a, 35b being closed) or extended (with the Tool halves 35a, 35b are opened) or hydraulic oil is fed back into the supply circuit to the hydraulic tank (bypass operation).
- the embodiment of the control valve 6 shown in FIG. 1 is a control valve which can be rotated in the extension of the axis of the handle 16 and has a so-called star handle which is rotated by the operator to control the switching positions.
- the housing 12 comprises two housing shells which (see FIG. 3) via connecting elements 7, e.g. Screws that are connected to each other. There is no seal to protect against the ingress of water into the housing 12 when the housing 12 is immersed in water.
- the tools in question are able to be operated in any spatial arrangement or orientation.
- the invention can also be used as a spreading device, a combination device with cutting and spreading functions or as a lifting device. or rescue ram. All these devices use a piston rod that is guided in a cylinder, e.g. a hydraulic cylinder.
- Fig. 2 shows an example of a hydraulic circuit diagram of an implement according to Fig. 1.
- the electric motor is a brushless DC motor that drives two piston compressors 2a, 2b via an eccentric shaft 36.
- the piston compressor 2b can have a greater delivery capacity than the piston compressor 2a.
- the flow rate of the piston compressor 2b is z. B. passed to a pressure changeover valve 32.
- the flow rate of the piston compressor 2a is also passed as a control signal to the pressure changeover valve 32.
- the pressure changeover valve 32 can be set to a specific pressure changeover value by means of spring force. If the pressure in the control line of the piston compressor 2a exceeds this pressure changeover value, the pressure changeover valve 32 is opened and the flow rate of the piston compressor 2b is discharged into the tank 19. This ensures that the required drive power of the system remains within the available drive power.
- the delivery flow branches further in the direction of changeover valve 6 and pressure shutoff valve 31.
- the pressure shutoff valve 31 is set to the permissible system pressure by means of spring force. If the pressure exceeds the set permissible system pressure, the pressure shut-off valve 31 opens and allows the flow to flow back into the tank until the pressure falls below the permissible pressure again.
- the control valve 6 is actuated manually by the user by means of a star grip (see FIG. 1). It has a spring-assisted reset function in the neutral position. In the neutral position, as shown, it is in the middle position. In this position, all connected lines are connected to the tank so that no pressure can build up and the system therefore does not move.
- control valve 6 If the control valve 6 is deflected, for example, to the right, then in the left connecting line, the pressurized flow is conveyed in the direction of the double-unblockable check valve 28. On the right-hand connection line there is hydraulic oil, which comes from the direction of the double unlockable check valve 28 comes, returned to the tank 19. If the control valve 6 is deflected to the left, the process just described reverses, so that ultimately the direction of movement of the device is reversed. The flow, which is conveyed into the left connection line of the double-unblockable check valve 28, opens a spring-loaded check valve in the left connection line and via a control line, which is routed to the right connection line, also the check valve located there.
- the hydraulic cylinder 4 has a branch on Si safety valves 29, 30 at both connections. These safety valves 29, 30 ensure that the pressure in the cylinder chambers cannot rise higher than permissible. If the pressure in one or both cylinder spaces rises above the safety-related permissible pressure, these valves open a connection to the tank 19 so that the pressure can be reduced again.
- An increase in the pressure within the hydraulic cylinder 4 can occur, for example, if forces acting on the piston of the hydraulic cylinder 4 from the outside additionally compress the hydraulic oil.
- devices are attached which, for example, move a shear knife, a spreader or the like.
- the tank 19 can be designed, for example, as a flexible rubber bellows and at the same time serves as a compensation device.
- Fig. 3 shows a partial sectional view of the interior of the area of the housing 12 of the implement 1 of Fig. 1.
- the electronic control and regulating device for control and / or regulation comprises a circuit board 8 with electronic components 9, in particular the power supply for the concern brushless DC motor.
- a circuit board 8 with electronic components 9, in particular the power supply for the concern brushless DC motor.
- Control panel provided with a display 14, which comprises its own circuit board 20.
- the control panel of the display 14 is preferably a waterproof membrane keyboard. The necessary operations can be carried out using the membrane keyboard.
- a further circuit board 22 is provided in the area of the control valve 6, on which a sensor 21, in particular a magnetic sensor, for detecting the deflection of the star grip of the control valve 6 is located as an electronic component.
- the sensor 21 is connected to the circuit board 20 via a control line 10a.
- the circuit board 20 is connected to the circuit board 8, which is the main circuit board, via a further control line 10b.
- the control line 10b is connected to the circuit board 20 and / or the circuit board 8 via watertight connection means 11.
- a part of the respective connection means 11 can be arranged on the side of the circuit board and preferably also partially embedded there.
- the opposite part of the connection means 11 is located on the control line 10a or 10b.
- the connecting means 11 can be a plug-in connection and / or rotary connection, which can be sealed by a sealing means (not shown in the figures), for. B. is sealed an O-ring.
- the control lines 10a and / or 10b are each lines via which control signals are sent.
- connection means 11 of the Steuerlei device 10 a to the electronic components of the circuit board 20 and the circuit board 22 of the sensor 21 in the embodiment according to FIG. 3 a direct connection to the circuit board z. B. provided by solder connection. Plug and / or rotary connectors are provided in FIG. 3 as connection means 11 of the control line 10b between the board 8 and the board 20.
- 8 power cables for the power supply of the electric motor 3 are arranged in the area of the circuit board, which are in electrical connection with contact pins 27 for the battery or a power supply.
- the example shown is a three-phase connection with three power cables 23a, 23b and 23c.
- the electrical connections 24a to 24c of the power cables 23a, 23b and 23c for the energy supply of the electric motor 3 are at a sufficient distance from one another, which ensures that in the event that the connections 24a to 24c are surrounded by water, the electrical operating conditions of the implement (e.g. at a nominal voltage of 24 V) do not set an electrical short circuit via the water as the electrical conduction medium.
- Corresponding connections are also seen on the electric motor 3, but not recognizable in FIG. 3. Open contact pins 27 that are unprotected from water for electrical contact with a battery (or one that is not shown in FIG. 4) or a power supply unit are provided in the region of the insertion slot 28.
- the contact pins 27 are also at a sufficient distance from one another, which ensures that in the event that the contact pins 27 are surrounded by water, no electrical short-circuit occurs in the electrical operating conditions of the implement via the water as the electrical conduction medium.
- the contact pins 27 and the circuit board 8 are attached to a housing part 12a (battery holder).
- the control line 10b includes connection means 11 which are protected from water. From the enlarged partial view of FIG. 5, the electronic components 9 of the circuit board 20 can be seen, which are surrounded by casting compound 17. 5 of the circuit board-side part of the connection means 1 1 for the circuit board 20 can also be seen.
- the control panel 25 is designed as a membrane keyboard. This is a sandwich-shaped film layer structure.
- the front edge of the control panel 25, ie this structure, is also covered by casting compound 17.
- a gap 37 to the housing 12, preferably running completely around the control panel 25, is seen in the area of the front edge of the control panel 25, .
- the gap 37 is covered on the outside by a projection 38 of the control panel 25 or the membrane keyboard (e.g. in the form of a protruding film layer on the top, which is glued to a step 39 of the housing 12), so that a circumferential annular blind hole is formed, which can be filled with potting compound 17.
- the magnetic sensor 21 for determining the deflection of the star grip can be seen from the enlarged partial illustration of FIG. 6.
- This is located on its own board 22, which is accommodated in a sensor holder 33 in the form of a pocket-shaped recess. Magnetic sensor 21 and circuit board 22 are sealed to the outside of the sensor holder 33 by a sealing compound 17.
- the potting compound 17 thus closes the pocket-like recess of the sensor holder 33 to the outside.
- the control line 10a Connected to the circuit board 22 and encapsulated with the casting compound 17, the control line 10a, which leads from the circuit board 22 to the circuit board 20 of the control panel or display 14, is also connected. There, the end region of the control line 10a is also surrounded by potting compound 17.
- the circuit board 22 is defined as a removal area from the other circuit board 20. Both boards 20, 22 are connected via the control cable 10a. A solder connection is provided as the respective connection means 11 on both boards 20, 22. Furthermore, two predetermined separation points 40 are provided which must be destroyed in order to remove the circuit board 22, as a result of which the circuit board 22 can be removed with wiring. The connection means 11 are then included in the casting of the boards 20, 22 with potting compound 17. 8 shows an enlarged, isolated illustration of the control panel 25 with the on / off switch 13 and the display 14 with various displays and control panels.
- the control panel 25 is preferably designed as a waterproof membrane keyboard.
- the present invention makes it possible to operate the implement 1 even under water, without the housing 12 having to be sealed. This new, important functionality can thus be achieved without complex conversion measures or without any appreciable increase in the cost of production.
- the electronic components of the board 8, 20 and / or 22 are in particular microcontrollers, frequency converters, memory modules, electronic switches, measuring devices such as, for. B. integrated semiconductor temperature sensors and / or LEDs.
- the display 14 comprises a display device, which in turn e.g. a load display and / or operating status display and / or temperature display can include.
- the battery 18 has a waterproof housing or at least a self-contained waterproof encapsulation.
- the on / off switch 13 is a watertight on / off switch, for example a membrane switch or a push button switch.
- a potting compound based on PU, epoxy or silicone can preferably be used as the potting compound.
- a silicone-based potting compound is particularly suitable if elevated temperatures occur during operation of the implement 1.
- a network part (not shown in the figures) can also be inserted into the insertion slot 26, which is connected to the network via a cable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Push-Button Switches (AREA)
- Portable Power Tools In General (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18815956.0T PL3840842T3 (pl) | 2018-11-26 | 2018-11-26 | Przenośne urządzenie robocze do użytku przenośnego |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2018/082545 WO2020108727A1 (de) | 2018-11-26 | 2018-11-26 | Tragbares arbeitsgerät für den portablen einsatz |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3840842A1 true EP3840842A1 (de) | 2021-06-30 |
| EP3840842B1 EP3840842B1 (de) | 2022-10-26 |
Family
ID=64664231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18815956.0A Active EP3840842B1 (de) | 2018-11-26 | 2018-11-26 | Tragbares arbeitsgerät für den portablen einsatz |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11911639B2 (de) |
| EP (1) | EP3840842B1 (de) |
| JP (1) | JP7307169B2 (de) |
| CN (1) | CN112996572B (de) |
| PL (1) | PL3840842T3 (de) |
| WO (1) | WO2020108727A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102002641B1 (ko) * | 2019-04-23 | 2019-07-22 | 성원 | 배터리 교체형 유압장비의 방수하우징 |
| US20230105274A1 (en) * | 2021-06-09 | 2023-04-06 | Matthew Speed | De-escalating device |
| CN114434397A (zh) * | 2021-12-29 | 2022-05-06 | 艾迪斯鼎力科技(天津)有限公司 | 一种适于水下破拆救援的电动工具 |
| AT525756B1 (de) * | 2022-02-14 | 2023-07-15 | Weber Hydraulik Gmbh | Tragbares Arbeitsgerät für den Unterwassereinsatz |
| DE202024105875U1 (de) * | 2024-10-11 | 2026-01-13 | Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kommanditgesellschaft | Pressgerät |
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2018
- 2018-11-26 EP EP18815956.0A patent/EP3840842B1/de active Active
- 2018-11-26 US US17/296,809 patent/US11911639B2/en active Active
- 2018-11-26 WO PCT/EP2018/082545 patent/WO2020108727A1/de not_active Ceased
- 2018-11-26 PL PL18815956.0T patent/PL3840842T3/pl unknown
- 2018-11-26 JP JP2021529485A patent/JP7307169B2/ja active Active
- 2018-11-26 CN CN201880099406.6A patent/CN112996572B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112996572B (zh) | 2022-12-13 |
| WO2020108727A1 (de) | 2020-06-04 |
| US20220001215A1 (en) | 2022-01-06 |
| US11911639B2 (en) | 2024-02-27 |
| EP3840842B1 (de) | 2022-10-26 |
| CN112996572A (zh) | 2021-06-18 |
| PL3840842T3 (pl) | 2023-07-24 |
| JP7307169B2 (ja) | 2023-07-11 |
| JP2022519422A (ja) | 2022-03-24 |
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