EP3320822B1 - Suction device with a connection device - Google Patents

Description

The invention relates to a suction device for separating particles from a suction flow, with a suction motor for generating the suction flow and with a suction housing, in which the suction motor and a dust collecting space for collecting the separated from the suction flow particles are arranged, wherein on the suction housing, an electrical connection device , In particular a socket, for providing an electrical supply voltage for an electrical load, in particular a hand-held power tool, is arranged, wherein the suction device comprises a switch assembly with an electrical switch, based on a manually operable control element between a switch-off, in which the suction motor is not switched on, and a closed position is adjustable, in which the suction motor is switched on or turned on.

A suction device of this type is for example in DE 10 2009 015 642 A1 and DE 20 2011 003 605 explained.
The known vacuum cleaner can be equipped with up to two electrical connection devices in the form of sockets. To the sockets or connection devices, for example, an electric hand-held machine tool can be connected. The vacuum cleaner or the suction device serves as a power distributor, but can also be turned on and off by the hand-held machine tool.
However, there is a risk that the socket or connecting device of the suction device will be overloaded, which can lead to damage.

It is therefore the object of the present invention to provide a suction device with an improved safety concept with respect to its connecting device for an electrical consumer.

To solve the problem is provided in a suction device of the type mentioned that the switch assembly has a separate fuse from the switch device for the electrical connection device, which at least one electrical fault condition on the connection device of a release position, in which the supply voltage is applied to the connection device , in a backup position switches, in which the supply voltage is disconnected from the terminal device, and that the securing means based on the operating element between the securing position and the release position, in particular from the securing position into the release position, can be actuated.

When adjusting the switch from the open position to the closed position actuates or adjusts the control expediently the securing device of the securing position in the release position. It is also possible that the operating element when adjusting the switch from the closed position to the open position actuates or adjusts the securing device from the release position in the direction of the securing position. But it is also possible that the operating element during adjustment of the switch from the closed position in the open position, the safety device in its respective position, for example, the release position or the securing position, leaves and / or does not act on the safety device.

It is a basic idea that the suction device has a switch arrangement which comprises an additional securing device in order to move from a release position to a securing position in the event of a fault on the connection device for the external consumer, so that the connection device for the external consumer is switched off, so to speak. The operating concept in this context provides that the operator with the control element, with which he already turns on the suction device and off, the suction unit thus activates or allows its activation via the connection device, in addition, can also actuate the securing device, preferably can adjust from the securing position to the release position.

The hand-held power tool is, for example, a saw, in particular a dip saw or pendulum hood saws, a milling cutter, in particular a router, a grinding device or the like.

The electrical consumer, for example, the hand-held machine tool, advantageously forms no part of the suction device.

The electrical load and the suction device expediently form separate structural units from each other.

The electrical load is advantageous self-sufficient or operated separately from the suction device. The electrical consumer has expediently no suction.

The electrical load and the suction device are advantageously electrically connected or connectable exclusively via electrical contacts and / or an electrical connecting line or connecting line.

The electrical consumer, for example the hand-held power tool, is preferably not mechanically connectable or connected to the suction device apart from a supply line of the load connected to the connection device or the connection contacts of the load in electrical contact with the connection device.

The suction device is or preferably forms a workshop vacuum cleaner.

The suction device has expediently roles for rolling on a substrate.

In principle, it is possible that the switch and the safety device are arranged in one and the same housing. In particular, it is possible that the Safety device forms an integral part of the switch or both, safety device and switch, form an integral device or integral component.

A preferred concept, which is explained in more detail in the drawing, however, provides that the securing device and the switch from each other are separate switching elements.

It is preferred if the switch and the safety device are arranged in separate housings.

It is preferably provided that the switch and the securing device, which are configured as separate switching elements and / or arranged in separate housings, are accommodated in a holder which has receptacles for the switching element and the securing device. The recordings include, for example, plug-in recordings, snap-in recordings or the like. Appropriately, it is provided that thru axles, along which the switching element and the securing device are inserted into the respective plug-in receptacle, parallel or approximately parallel to each other.

It is particularly advantageous if the switching elements are accommodated next to one another in the holder.

It is expediently provided that the securing device has a holding arrangement, for example a latching arrangement, for holding the securing device as a whole and / or an actuating element of the securing device in a position assigned to the release position. In particular, it is provided that the actuating element remains in this position even when the operating element does not act on the securing device. Thus, therefore, the actuator, for example, a slide, a push button or the like, for example, in a position, in particular a depressed position remain, even if the operating element does not act in the direction of the release position on the securing device. It is also possible that the securing device is held only internally in the release position, for example by switching contacts of the securing device remain in the release position or in a contact position, while an actuating element of the securing device from one of the release position in one of the securing position is adjustable. Thus, it is therefore possible that, for example, an actuating element of the securing device is movable relative to these switching contacts, but they remain in the release position, even if the actuating element is actuated in a direction associated with the securing position.

It is preferred if the operating element without the securing device from the release position to actuate the securing position from one of the switch position of the switch associated position, for example, rotational position or axially displaced position, in a switch-off position of the switch associated position is adjustable. For example, the operator can switch off the suction device by adjusting the operating element in the direction of the position assigned to the switch-off position, for example by turning it or pressing it by pressing a button. Nevertheless, the safety device remains in the release position.

It is advantageous if the switch and the securing device each have an actuating element which can be actuated by the operating element. Thus, therefore, separate actuators for switch and safety device are provided, which, however, are operated by a common control. This makes a comfortable operating concept possible.

The actuating elements of the switch and securing device expediently have the same or substantially the same actuating stroke and / or operating angle for adjustment between the respective switching positions of the switch and the securing device, ie switch-on position and switch-off position or securing position and release position. Thus, the operating element at a Betätigungshub or a rotation about the operating angle simultaneously as switches and the safety device between their respective positions adjusted, for example, the switch from the off position in the closed position and the securing device from the securing position to the release position.

It can be provided, for example, that the control element with the switch, for example, its actuator is fixedly coupled so that upon actuation or adjustment of the control of the switch is forcibly operated between the open position and the closed position. For example, this concept is advantageous when the switch is designed as a rotary switch. When the control is turned, the rotary switch is moved to the on or off position. The operating element is latched and / or glued and / or welded and / or jammed or the like with the actuating element of the switch, for example.

It is also possible that the actuating element of the switch simultaneously represents the operating element of the switch, so that therefore the actuating element of the switch for actuating the securing device is configured.

It is also an embodiment of the invention possible in which the control element is not fixedly coupled to the switch and / or the securing device. For example, it is advantageous if, on the one hand, the operating element and, on the other hand, the switch and / or the securing device have clearance, such that the operating element can be adjusted without actuating the switch or the securing device.

In principle, it is possible that, for example, the switch is designed as a push-button switch. At a first keystroke, the switch is actuated, for example, from the open position to the closed position, with a subsequent second keystroke from the closed position to the open position. Conveniently, it is provided that the switch is designed as a push-button switch, which is adjustable by means of successive tactile actuations from the open position to the closed position and from the closed position to the open position.

In this scenario, it is readily possible that the operating element is decoupled from an actuating element of the pushbutton, that is, is movable relative to this actuating element.

It is possible that the key switch so to speak pretends the position and / or the kinematics of the operating element when the operating element is firmly coupled to the key switch. If the key switch, for example, assumes the switch-on position, the operating element is in a position assigned to this switch-on position, for example a position pressed in the direction of the vacuum cleaner housing. A suspension of the key switch can thus react directly on the control.

Consequently, it is advantageously provided that a spring arrangement of the switch is coupled to the operating element.

Advantageously, it is provided that the securing device is designed as a push-button switch or has a push-button switch, which can be actuated by a tactile actuation from the securing position into the release position.

In particular, it is expedient if both, namely the securing device and the switch, are designed as a pushbutton switch or have push-button, so that both switches can be actuated by a linear actuation or tactile actuation. But it is also possible that the switch for the suction motor is designed as a rotary switch, while the safety device is designed as a key switch or has a key switch.

In particular, it is advantageous that there is a gap between the actuating element of the securing device and the or an operating element when the securing device assumes the release position and the operating element is adjusted to a position assigned to the switch-off position of the switch. Thus, for example, the operating element does not take the actuating element of the securing device in the direction of the securing position when it actuates the switch from the switched-on position into the switched-off position.

Preferably, it is provided that between the actuating element of the securing device and the or an operating element a clearance is present such that the operating element without the actuating element of the securing device from the release position to actuate the securing position from one of the closed position of the switch associated position in one of the off position Switch assigned position can be actuated.

A preferred concept provides that the operating element has an actuating gate and / or an actuating projection for actuating the securing device, in particular an actuating element of the securing device, from the securing position into the release position. For example, this involves a rotary link and / or an inclined surface, which, upon rotation of the operating element from a rotational position assigned to the switch-off position of the switch, engages with the actuating element of the safety device in a rotational position assigned to the switch-on position of the switch and the securing device in the direction the release position is actuated. As already mentioned, a clearance is preferably present between the actuating element of the securing device and the operating element, for example the actuating projection or the actuating link and the actuating element of the securing device, when the securing device remains in the release position, but the operating element is assigned to one of the switch-off position of the switch Position is adjusted back. Thus, for example, the actuating projection from the actuating element of the securing device can be adjusted linearly or in the sense of a rotation away, wherein the securing device remains in the release position.

The securing device is preferably provided exclusively for securing the connection device. Thus, a fault situation can be detected on the connection device in order to switch off the connection device. But it is also possible that the securing device secures at least one further electrical component, for example, the suction motor and / or a control of the suction device. Thus, it is possible, for example, that by means of the safety device, a total current or a total power, the Suction device can be supplied via a connecting cable or by means of a battery arrangement, can be hedged in total by means of the securing device.

It should be emphasized at this point that the suction device can be a network-connected device, that is to say, it can be connected to a power network. H. that it preferably has an electrical connection device for connection to a power supply network, in particular an AC power supply network. The power grid is, for example, a 220-240 V AC, 120 V AC, or the like. It can also be a DC network.

Furthermore, the suction device advantageously has an energy storage arrangement, for example a battery pack or the like, on board. It is also possible for the suction device to have only one connection or one connection interface for connecting an energy storage arrangement, in particular one or more battery packs.

Advantageously, it is provided that the securing device is connected between the connection device for the electrical consumer and a connection of the suction device for connecting at least one energy store, in particular a battery pack, and / or for connection to an electrical supply network.

The connection interface or the connection of the suction device comprises, for example, connection contacts for at least one energy store and / or for a power cable. The power cord can be plugged into the terminals and includes, for example, a power plug for plugging into a power outlet of a supply network, such as a network with 120 V DC or 230 V AC. It is also possible that the connection point or the connection of the suction device comprises a power cable, which is fixedly mounted on the suction device.

A preferred concept provides that the connection device via the securing device with a connecting line of the suction device for connection to a power supply network, in particular an AC voltage network, is electrically connected or connectable. In particular, it is advantageous if the potentials provided in each case by the power supply network are uninfluenced and / or unchanged connected or connectable by the safety device, apart from the switching off of the supply voltage in the securing position. Thus, if, for example, a supply voltage of 220-240 V is provided, it is switched through directly by the safety device, as it were, to the connection device when the safety device is in the release position.

Between the connecting device for the electrical load and the connection or the connecting line of the suction device or the energy storage device, therefore, apart from the safety device in this embodiment, no intermediate electrical or electronic components are present. Advantageously, no power electronic or other electrical change of the supply voltage is provided between the connection device for the electrical load on the one hand and a power supply line of the suction device or one connection of the suction device for an energy storage device on the other hand.

It is also expedient if the safety device for electrical isolation of the connection device for the electrical load, for example, the hand-held machine tool, designed and / or provided by a connection and / or by a connecting line of the suction device, with or with the suction device an electrical supply network, in particular AC mains, can be connected.

The safety device preferably has, in particular exclusively, electrical switch contacts for switching the supply voltage to the electrical connection device. For example, the securing device comprises a relay. The switch contacts can be closed in the release position be so that the supply voltage is applied to the terminal device, while they are electrically separated from each other in the securing position and / or apart, so that the supply voltage is not applied to the terminal device.

It is also advantageous if the safety device is configured to an all-pole and / or multi-pole switching.

A preferred concept provides that the securing device is configured to connect the electrical connection device to a neutral conductor or ground conductor in the release position and to disconnect the electrical connection device from a neutral conductor or ground conductor in the securing position. However, it is advantageous if protective contacts of the connecting device are electrically connected to a ground potential / neutral potential even in this disconnected position or release position. The securing device is therefore advantageously not designed and / or provided for switching the protective contacts.

A preferred concept further provides that the securing device is designed not only for the electrical protection of the connection device but also for the electrical protection of at least one further component of the suction device, in particular of the suction motor.

Advantageously, it is provided that the connection device is designed and / or arranged to secure a total flow, which is at least the current flowing through the connection device and at least one further current, in particular the motor current and / or other currents, which are consumed on or in the suction device. For example, it is provided that the securing device is connected between an electrical connection of the suction device and the connection device and at least one further consumer, for example the suction motor and / or further components. It is possible that the switch assembly for the suction motor between the terminal of the suction device, such as a power line or a to the connection for an electrical energy storage, and the safety device is connected. But it is also possible that the electrical connection device and the switch assembly are connected in parallel to the output of the safety device, ie that the safety device between the electrical connection of the suction device and on the one hand the switch assembly with the suction motor and on the other hand, the electrical connection device for the electrical load switched is.

Securing other components of the suction device can, as I said, include the suction motor. However, other electrical consumers, such as an electronic control of the suction device, can be secured in this way. Consequently, preferably all of the suction device including the connection device with the electrical consumer consumed currents are protected by the securing device. Thus, as already mentioned, for example, it may be connected directly behind or at an electrical connection of the suction device, which is provided for connection to an electrical supply network and / or an electrical energy store, in particular a battery pack. For example, the suction device may comprise two or more electrical sockets for insertion of a hand-held machine tool.

Furthermore, the suction device is advantageously configured for an automatic operation. In particular, it is advantageous if it has an automatic switch or a switching device for switching on and off the suction motor in response to a current flow through the connection device. So if, for example, the switch is in the on position, not yet directly flow to the suction motor. Only when the connection device is used by an electrical load, ie, current flows over it, the suction motor turns on. The switching device has, for example, one or more shunts or the like other sensors suitable for detecting a current flow via the connection device.

One possible concept may provide that the switch has a first closed position and a second closed position and an off position, wherein the first closed position corresponds to an actual switching on the suction motor, d. H. that the naturally-aspirated engine runs when the switch is in the first switch-on position, while in the second switch-on position the suction motor is switched on depending on a current drain or other use of the connecting device. The naturally aspirated engine only runs when the connection device is used, for example, the aforementioned switching device detects the use of the connection device and turns on the suction motor. In this embodiment of the invention, it is advantageous if with each actuation of the switch from the open position to the first closed position and the second closed position, the safety device can be actuated from the securing position to the release position.

In the case of an embodiment of the switch for the naturally-aspirated engine as a rotary switch, for example, a rotation (for example, a left turn) in a first rotational direction of the first switching position and a rotation (for example, a clockwise rotation) in an opposite second direction of rotation of the second switching position be assigned, wherein the Off position between these two first and second rotational positions is. In this case, for example, a first link and / or a first actuating projection of the first rotational position be assigned and actuate the securing device from the securing position to the release position and a second link and / or a second actuating projection of the second rotational position to be assigned and the securing device also from the Press the securing position into the release position.

But also conceivable is sequential actuation (rotary actuation or pressure actuation), ie, for example, the control element actuates the switch starting from the switch-off position into the first switch-on position and then the second switch-on position, for example the first switch-on position for continuous operation of the suction motor and the second switch-on position an operation of the suction motor in dependence on a use of the connecting device are assigned. The assignment of the first and second Switching position to the operating modes of the vacuum cleaner is also possible otherwise.

The security device can provide a variety of backup options.

The error condition is, for example, a current error condition, i. H. the exceeding of a maximum current, and / or a power error condition, d. H. the exceeding of a maximum power and / or a fault current error condition, d. H. that a so-called fault current flows through the connecting device. The error condition can also be a thermal error condition, i. H. For example, an overload on the suction device or its connecting line, a thermal overload on the connecting device or the like.

For example, a thermal fuse is possible. For this purpose, the securing device expediently has a thermal protection switch which switches in the direction of the securing position when a thermal threshold value is exceeded.

Another or alternative concept provides that the safety device has a residual current circuit breaker. It should also be mentioned at this point that the connecting device expediently has a protective contact. Thus, therefore, protective conductor contacts are provided on the connection device.

Furthermore, it is advantageous if the safety device has a current protection switch which switches in the direction of the securing position when a maximum current value on the connection device is exceeded. Thus, for example, the maximum current drain can be secured via the connection device.

The control is expediently designed as a rotary control. In particular, it is advantageous if the operating element is rotatably mounted. It is also possible that the control element is mounted linearly adjustable. For example, the control element has a linearly adjustable control body on. This operating body is expediently arranged below a protective film or an elastic cover. Generally speaking, the operating element expediently has at least one film switch or a foil cover or an elastic cover. Under the foil cover or elastic cover of the control body can be arranged. The elastic cover is provided for example by a rubber molding or other made of elastic plastic component or formed thereby.

The operating body acts, for example, on the switch and the securing device. The operating body expediently has at least one actuating projection, which acts on the securing device, in particular its actuating element.

It is preferably provided that the switch and / or the securing device are arranged in separate encapsulated housings. The housings are preferably encapsulated against spray water and / or other environmental influences. The already mentioned controls are arranged for example below protective films or covers.

Furthermore, it is possible that the switch and / or the safety device are designed as a push-button or as a toggle switch.

Figur 1

eine perspektivische Schrägansicht eines Staubsaugers sowie einer Hand-Werkzeugmaschine,

Figur 2

eine durch einen Betätigungsdruck betätigbare Schalteranordnung des Staubsaugers gemäß Figur 1 in einer Ausschaltstellung eines Schalters für einen Saugmotor des Sauggeräts, wobei eine Sicherungseinrichtung der Schalteranordnung in der Sicherungsstellung ist,

Figur 3

die Schalteranordnung gemäß Figur 2, wobei der Schalter für den Saugmotor in eine Einschaltstellung und die Sicherungseinrichtung in ihre Freigabestellung verstellt ist,

Figur 4

die Schalteranordnung gemäß Figuren 2, 3, wobei der Saugmotor-Schalter in der Ausschaltstellung und die Sicherungseinrichtung in die Freigabestellung verstellt ist,

Figur 5

eine Schaltung des Sauggeräts gemäß vorstehender Figuren, wobei nur eine elektrische Anschlussvorrichtung anhand der Sicherungseinrichtung gesichert ist,

Figur 6

eine Schaltung des Sauggeräts mit einer alternativen Konfiguration, bei der über einen zentralen Hauptschalter des Sauggerätes der Saugmotor und die Anschlussvorrichtung schaltbar sind,

Figur 7

eine Schaltung des Sauggeräts mit einer alternativen Konfiguration, bei der die Sicherungseinrichtung den Saugmotor und die elektrische Anschlussvorrichtung absichert,

Figur 8

eine Seitenansicht einer durch Dreh-Betätigung betätigbaren Schalteranordnung für den Staubsauger gemäß Figur 1, insbesondere als Alternative zu der Schalteranordnung gemäß Figuren 2-4, wobei ein Schalter für den Saugmotor unbetätigt ist und eine Sicherungseinrichtung der Schalteranordnung eine Freigabestellung einnimmt,

Figur 9

die Schalteranordnung gemäß Figur 8, wobei die Sicherungseinrichtung ihre Sicherungsstellung einnimmt,

Figur 10

die Schalteranordnung gemäß Figuren 8, 9, wobei ein Dreh-Bedienelement in Eingriff mit der Sicherungseinrichtung gelangt,

Figur 11

die Schalteranordnung gemäß Figur 10, wobei das Dreh-Bedienelement die Sicherungseinrichtung aus der Sicherungsstellung in die Freigabestellung betätigt, und

Figur 12

eine Schaltung des Sauggeräts mit einer Sicherungseinrichtung, die den Saugmotor und die elektrische Anschlussvorrichtung absichert, als Variante der Schaltung gemäß Figur 7 und

Figur 13

eine weitere Schaltung des Sauggeräts mit einer Sicherungseinrichtung, die den Saugmotor und die elektrische Anschlussvorrichtung absichert als eine Variante der Schaltung gemäß Figur 6.

Hereinafter, embodiments of the invention will be explained with reference to the drawing. Show it:

FIG. 1

a perspective oblique view of a vacuum cleaner and a hand-held machine tool,

FIG. 2

an operable by an actuating pressure switch assembly of the vacuum cleaner according to FIG. 1 in an off position of a switch for a suction motor of the suction device, wherein a safety device of the switch assembly is in the securing position,

FIG. 3

the switch assembly according to FIG. 2 wherein the switch for the suction motor is adjusted to a closed position and the securing device in its release position,

FIG. 4

the switch assembly according to FIGS. 2, 3 wherein the suction motor switch is in the off position and the securing device is adjusted to the release position,

FIG. 5

a circuit of the suction device according to the above figures, wherein only one electrical connection device is secured by means of the securing device,

FIG. 6

a circuit of the suction device with an alternative configuration in which via a central main switch of the suction device, the suction motor and the connecting device are switchable,

FIG. 7

a circuit of the suction device with an alternative configuration in which the securing device secures the suction motor and the electrical connection device,

FIG. 8

a side view of a rotary actuated actuatable switch assembly for the vacuum cleaner according to FIG. 1 , in particular as an alternative to the switch arrangement according to Figures 2-4 wherein a switch for the suction motor is not actuated and a safety device of the switch arrangement occupies a release position,

FIG. 9

the switch assembly according to FIG. 8 , wherein the securing device assumes its securing position,

FIG. 10

the switch assembly according to FIGS. 8, 9 wherein a rotary control element comes into engagement with the safety device,

FIG. 11

the switch assembly according to FIG. 10 , wherein the rotary control element actuates the securing device from the securing position into the release position, and

FIG. 12

a circuit of the suction device with a safety device which secures the suction motor and the electrical connection device, as a variant of the circuit according to FIG. 7 and

FIG. 13

a further circuit of the suction device with a safety device which secures the suction motor and the electrical connection device as a variant of the circuit according to FIG. 6 ,

A suction device 10 in the form of a mobile suction device is designed, for example, as a workshop vacuum or suction device for a construction site. A sucker housing 11 of the suction device 10 is rollable on rollers 12 on a substrate. Furthermore, the suction device 10 can be grasped on a handle 20, so that it can be carried by an operator to the place of use. In the sucker housing 11, a suction motor 13 for generating a suction flow T is arranged. The suction flow T is sucked through a suction inlet 15, for example, on a front wall 21 of the sucker housing 11, in the sucker housing 11, specifically in a dust collection chamber 14, in which separated from the suction flow T separated particles, for example dust, sawdust or the like can. Downstream of the dust collection chamber 14, a filter 16 is arranged. The filter 16 is disposed between a suction turbine 22 driven by a suction motor 13 and the dust collecting space 14. The blown from the suction turbine 22 suction flow T flows as exhaust air stream U via an outflow opening 17 from the sucker housing 11.

The suction device 10 is used, for example, to suck dust, sawdust or other abrasion generated by a hand tool 90. The hand tool 90, for example a grinding device, has a drive motor 91 for driving a tool 92. With the tool 92, for example a grinding tool, milling tool or the like, a workpiece W to be edited. This creates chips, dust or the like of other dirt, which is sucked by the suction device 10. To a suction port 93 of the power tool 90, for example, a suction hose 94 can be connected, which is connectable to the suction inlet 15. The suction device 10 can thus suck on the basis of the suction flow T generated by the tool 92 dust. Furthermore, the suction device 10 can supply the handheld power tool 90 with power. At an electrical connection 95 of the power tool 90, a connecting line 96 is provided which can be inserted by means of a plug 97 into an electrical connection device 23 of the suction device 10. For example, plug contacts 98 of the plug 97, which is, for example, a safety plug, can be plugged into sockets 25, 26 of a socket 24 of the connection device 23. The socket 24 is for example a safety socket. The socket 24 may accordingly have protective contacts 27.

The connection line 18 of the suction device 10 is provided at an electrical connection 28. The connecting line 18 may be fixedly connected to the terminal 28. However, the connection 28 can also be provided for releasably connecting the connecting line 18 to the suction device 10, for example by means of a plug connection.

Starting from the terminal 28, two partially similar circuits 30, 130, which are different in relation to the security concept, are subsequently referred to in FIG FIGS. 5, 6 explained.

In the circuits 30, 130 lead lines 31 to the contact 25, and lines 32 to the protective contacts 27. A line 33 is used for power supply and is connected via a switch assembly 50 to the socket 25. The lines 31, 33 correspond for example to a neutral conductor or a ground conductor and a phase or vice versa, depending on the polarity in which the plug 19 is connected to a power supply network 100. For example, contacts 34, 36 in contacts 101, 103 of a power outlet 104 of the power supply network 100 insertable so as to connect neutral and phase of the suction device 10 with neutral and phase of the power supply network 100.

Contacts 35, protective conductor contacts, of the plug 19 are to be connected to contacts 102 of the socket 104, namely protective conductor contacts. The connecting line 31 contains, for example, three wires for connection to the neutral conductor, protective conductor and phase of the power supply network 100.

The neutral conductor can also be referred to as a ground conductor.

When not in use, the socket 24 is closed by means of a lid 29. The lid 29 is for example a hinged lid.

Via branch lines 37, 38, a switch 51 with switching contacts 52, 53 is connected to the lines 31, 33. Based on the switching contacts 52, 53, the branch lines 37, 38 can be brought into electrical connection with connecting lines 39, 40 of the suction motor 13. Thus, when the switching contacts 52, 53 and thus the switch 51 is actuated from a switch-off position A in a closed position E, the switch contacts 52, 53 are closed and thus the suction motor 13 with the potentials of the lines 31, 33 connected. The suction device 10 is then actively switched on for the suction or switched on.

The switch-on results from the fact that preferably an automatic switch 60 is provided, which is connected in the connecting lines 39, 40. Switching contacts 61 of the automatic switch 60 are closed, for example, when a sensor 62 detects a current flow of a current Is to the connection device 23, and therefore the handheld power tool 90 is switched on. Then, for example, a current Is, for example via the line 31, which is detected by the sensor 62, for example, a shunt, and is reported via a line 63 to the automatic switch 60. The automatic switch 60 then closes the switching contacts 61 in a manner known per se so that the suction motor 13 runs and the suction device 10 is in suction operation.

It is understood that the automatic switch 60 may also have a tail, that is, even after a shutdown of the power tool 90, the suction motor 13 lags by a predetermined time.

If the automatic switch is missing, by closing the switch 51, so if this is adjusted to the closed position E, the suction motor 13 is switched on permanently.

In the electrical circuit 130, the line 31 is electrically connected to a fuse 70 via a branch line 41. The safety device 70 comprises a switching contact 71 which, in the closed state, hereinafter referred to as the release position F, connects the branch line 41 and thus the line 31 to a connection line 42 which leads to the socket 25 of the socket 24. The switching contact 71 is connected to a counter-contact 71A electrically connected to the branch line 41 in the closed state, the release position F, in electrical contact, in the securing position S is not in electrical contact.

When the fuse device 70 assumes its fuse position S, the switch contact 71 is open, so that a supply voltage V between the lines 31, 33, for example, 230 volts, 110 volts or 120 volts AC or the like, no longer s.die sockets 25, 26, therefore that is no longer applied to the connection device 23. In the case of the switch arrangement 30, therefore, the connection device 23 is secured separately from the suction motor 13 by the securing device 70. Thus, the safety device 70 switches off or on only the connection device 23, while the suction motor 13 is not secured.

But it is possible that a separate safety device 65 is provided for the suction motor 13. It can be provided, for example, that the safety device 65 is realized by the automatic switch 60. The automatic switch 60 or the securing device 65, for example, an excessive current flow to the suction motor 13, overheating or the like sensory capture, for example, by means of a sensor 66 which detects the flow of current to the suction motor 13. The sensor 66 is a shunt, for example. Alternatively or additionally, it is also possible to provide a sensor which detects thermal conditions, for example a thermal sensor 67, in particular on the suction motor 13. This thermal sensor 67 is connected to the safety device 65 without wires or via radio and reports, for example, a thermal fault condition on the vacuum motor 13 to the automatic switch 60, so that this example, in an overheating of the suction motor 13 or when exceeding a threshold temperature of the suction motor 13 to a shutdown the securing device 65 leads.

In the electric circuit 130 according to FIG. 6 the fuse device 70 is connected in series with the switch 51 or in dependence on the switch-on or switch-off position of the switch 51. For example, the safety device 70 or its mating contact 71A is connected for switching through its switching contact 71 via a branch line 141 on the output side to the switching contact 52, then, when it assumes its release position F, current through the connecting line 42 to the contact or to the socket 25 of To lead connecting device 23. If the switch 51 is closed or occupies its closed position E and also the securing device 70 assumes its release position F, so is the supply voltage V to the sockets 25, 26, thus the contacts of the connecting device 23, to.

In a circuit 230, both the suction motor 13 and the connection device 23 are secured by the securing device 70. For example, the line 37 is connected on the input side to the switching contact 71 of the fuse device 70, which is connected on the output side via a connecting line 242 to the input of the switch 51, in particular the switching contact 52. The output of the switch 52 leads on the one hand to the connecting line 39 of the suction motor 13, on the other hand via a line 243 to the socket 24 and connecting device 23, in particular to the socket 25. Thus, if the switching contact 71 is closed, so the release position F of the securing device 70 is set, Current flows via the line 33, the lines 39, 243 to the suction motor 13 and the connection device 23 or is there the supply voltage V on. The safety device 70 thus secures both the suction motor 13 and the connection device 23 in the circuit 230. Thus, if, for example, the maximum supplyable current from the power supply network 100, in particular 16 amps is exceeded at 230 volts AC, the fuse 70 switches off at the circuit 230, regardless of whether this current from the suction motor 13 or from the power tool 90 or any other the connection device 23 consumed consumers is consumed. In the case of the circuit 30 or 130, by contrast, the securing device 70 secures only the connection device 23 in each case. For example, the securing device 70 can be configured such that it allows the removal of power from the connecting device 23 that is only possible in addition to the power of the suction motor 13 and can be provided by the power supply network 100. If, for example, the naturally aspirated motor 13 already consumes 6 amperes at a maximum current of 16 amperes via the connecting leads 31, 33, the fuse device 70 only allows a current of, for example, 10 amperes, which may flow via the connecting device 23, in the circuits 30, 130 , In addition, it should be noted that, of course optional the automatic switch 60 is also possible in the circuits 130, 230 to depending on the current flow (there may be arranged the sensor 62) or the line 243 to sense the flow of current through the connection device 23 to this Ways to turn on the suction motor 13 and thus the suction device 10 when a current flows through the connecting device 23.

An advantageous concept may provide that the securing device 70 is designed for electrically isolating and / or connecting the connection device 23 from the electrical supply voltage V, for example by moving the switching contact 71 from or to the mating contact 71A.

A multi-pole, in particular all-pole, switching concept can also be provided. For example, an in FIG. 6 indicated embodiment possible that connected in the line 31 and in the connection to the socket 26, the neutral conductor another switching contact 171 of the fuse device 70 is electrically connected in a closed position with a mating contact 171A, so that the socket 26 is connected to the neutral conductor / ground conductor. In an open position of the switching contact 171 this is electrically isolated / removed from the mating contact 171A, in which case the socket 26 is not connected to the neutral conductor / ground conductor.

The switch arrangement 50 and the securing device 70 shown in the circuits 30, 130 and 230 can have different configurations, with two mechanical variants being presented below. In the embodiment according to FIGS. 2 to 4 is a pressure-control concept or pressure-actuation concept of the switch assembly 50 explained. Alternatively, a switch arrangement 150 with a rotary operating concept can be used which has a safety device 70. To clarify both mechanical possibilities, these are in FIG. 1 shown in the suction device 10, ie the suction device 10 can be selectively actuated based on the switch assembly 50 or 150 and has the respective associated safety device 70. in practice, the suction device 10 of course one of the switch assemblies 50 or 150. The internal interconnection or assignment of the switch assembly 50 to the connecting device 23 and / or the naturally aspirated motor 13 can each of the variants according to FIGS. 5, 6 and 7 or other variants, which are not shown here in detail.

In the case of the switch arrangement 50, a linear, keystroke-based operating concept is realized. The switch 51 with its switching contacts 52, 53 can be actuated by means of an actuating element 55 between the switch-off position A and the switch-on position E. The switch 51 is a key switch which remains bistable in the on position E or the off position A when it is operated by means of a control element 80. The operating element 80 has an operating body 81 on which actuating projections 82, 83 are arranged. The operating body 81 is - as shown by a double arrow - linear actuated along an actuating axis BA, wherein the actuating element 55, the arranged in a housing 54 of the switch 51 switching contacts 52, 53 actuated between the two switching positions E and A. In the switch-on position E are connection contacts 56, 57 of the switch 51, to which, for example, the connection lines 39, 40 on the one hand and the branch lines 37, 38 on the other hand are connected, electrically connected to each other, so that the supply voltage V output side contacts the switch 51.

With the operating element 80, however, the securing device 70 is also adjustable from the securing position S into the release position F. The actuating projection 83, which projects in front of the operating body 81, acts on an actuating element 75 of the securing device 70. The actuator 50 is mounted linearly displaceable on a guide 73 parallel to the actuating axis BA. The guide 73 is arranged on a housing 74 in which the switching contact 71 is located.

On the housing 74 terminal contacts 76, 77 are further provided, for example, to connect the branch line 41 and the connecting line 42 to the securing device 70.

The securing device 70 further has a schematically illustrated, for example, a latch having locking arrangement 78 for locking, for example, the actuating element 75 in the release position F, as in FIG. 4 shown on. Thus, when the operating element 80 is shown by a force arrow P with an actuating force P in the direction of actuation of the switch 51 and the securing device 70 is subjected to force ( FIG. 3 ), the actuators 55, 75 are actuated, whereby the switch 51 occupies the closed position E and the switch of the securing device 70, the release position F. The actuating element 75 is thereby locked by the latching arrangement 78, so that it remains in the release position F even when the actuating element 80 is released or moved in the direction of the switch-off position A of the switch 51, see FIG FIG. 4 , In this case, a distance between the actuating element 75 and the actuating projection 83 is present.

According to the embodiment Figures 2-4 for example, the actuating projection 82 is fixedly connected or coupled to the actuating element 55, For example, locked, glued or screwed. Thus, the actuating element 80 respectively assumes the position of the actuating element 55 and thus of the switch 51, that is to say, for example, the closed position E (FIG. FIG. 3 ) or the switch-off position A ( FIGS. 2, 4 ). The switch 51 has, for example, a spring which acts counter to the force P. The switch 51 is bistable between the closed position E and the open position A. The respective position corresponds directly with the position of the control element 80, which is fixedly connected to the switch 51.

The arrangement according to Figures 2-4 is optimally protected against environmental influences and also easy to produce. The switch 51 and the securing device 70 are held on a holder 43, for example. The switch 51 and the safety device 70 are separate from each other components, which on the one hand facilitates the assembly, but on the other hand also in the event of a malfunction or a defect facilitates repair. For example, the only defective component 51 or 70 must be replaced.

The holder 43 comprises, for example, a holding housing 44, which may be formed integrally with the nipple housing 11 or may also constitute a separate component. On the holding housing 44 receptacles 45, 46 are provided for the switch 51 and the securing device 70. The recordings 45, 46 are for example plug-in recordings.

The holder 43 has latching lugs 47 at its one longitudinal area, at which the switch 51 and the safety device 70 can be inserted past in a plug-in direction I ( FIG. 3 ). The locking lugs 47 spring thereby transversely to the direction of insertion I to the outside. But it is also possible to insert the switch 51 and / or the securing device 70 against the insertion direction I, according to the force P in the plug-in receptacles 45, 46. In this case, the retaining projections of the locking lugs 47 must not be latching or resilient. Thus, in the embodiment designated as locking lugs 47 and functioning components in this case can form solid retaining projections.

Opposite to the holding projections or latching noses 47, a receiving area 48 for the operating element 80 is provided. The receiving area 48 supports the operating element 80 linearly in a receiving space 49. The receiving space 49 is closed by a covering device 85. The covering device 85 has, for example, a foil cover or elastic cover 86 which closes the receiving space 49. The film cover or elastic cover 86 is opposite to a control surface 84 of the control body 81. The foil cover 86 may also have a relatively large thickness. The film cover 86 may also be formed as a rubber molding or as an elastic cover. By pressure corresponding to the force P, the foil cover or elastic cover 86 is deformed in the direction of the operating surface 84 ( FIG. 3 ), so that a force on the operating surface 84 and thus the force P can be exerted on the operating element 80 in order to actuate the switch 51 and the securing device 70 when it assumes the securing position S.

The covering device 85 has a holder section 87 which, for example, bears against the receiving region 48 of the holding housing 44 on the outside and covers it. The covering device 85 expediently has protrusions 88 or connecting section 88 for producing a sealed connection with the sucker housing 11, for example a front wall section 21A into which the covering device 85 is inserted.

In the switch assembly 90, a rotary control concept is realized. A switch 151, functionally similar in electrical terms to the switch 51, also has switching contacts 52, 53 and connection contacts 56, 57. For clarity, connection contacts 57A, 56A are still shown, since the switch 151, like the switch 51, has two electrical inputs, two electrical outputs and two switching contacts in order to switch all poles.

An actuating element 155 of the switch 151 is rotatably mounted about a rotation axis D. The actuating element 155, for example a pivot pin which projects in front of the housing 154 of the switch 151, is rotatable about the axis of rotation D. and fixedly connected to a rotational drive portion 184 of a control element 180. Thus, when the operating element 180 is rotated about the axis of rotation D, the switch 151 is moved between the switch-off position A and the switch-on position E.

The operating element 180 has an operating projection 182, for example in the manner of a knob, which protrudes in front of a base body 181, which for example has a plate shape or shield shape, of the operating element 180.

An actuating projection 183 is formed on a region of the base body 181 opposite the actuating projection 182 in order to actuate the securing device 70. The operation projection 183 has an operation gate 185 for actuating the operation member 75. When the actuator 75, starting from the in FIG. 8 or 9 shown switch position A of the switch 151 in the direction of the closed position E, namely by a rotation about the axis of rotation D, in particular a clockwise rotation, passes an actuating slope 186 of the actuating link 185 into engagement with the actuating element 75 in order to remove it from the securing position S (FIG. FIG. 9 ) in the direction of the release position F ( FIG. 11 ). In the switch-on position E, an actuating surface 187 arranged next to the actuating bevel 186 engages the actuating element 75 and holds it in the release position F. Nevertheless, the safety device 70 can trigger, ie be actuated in the direction of the release position F, because a clearance between the one hand its switching contact 71 and on the other hand the actuator 75 is present.

It is also possible that the operating element 180 starting from the open position (A) in opposite directions of rotation (right and left) for switching the switch 151 for automatic operation or continuous operation is actuated and in each of the directions of rotation of the actuator 75 from the securing position S. can press in the release position F. For this purpose, for example, in addition to the Betätigungskulisse 185 another Betätigungskulisse provided for the actuator 75. In automatic mode, the suction motor 13 only runs when current flows through the connection device 23.

The safety device 70 operates, for example, thermally and / or in the event of a fault current and / or if a current flow via the connecting device 23 exceeds a predetermined amount. For this purpose, corresponding release means and measuring means, for example between the connection contacts 76, 77 of the securing device 70 are effective.

In both switch assemblies 50, 150 a similar actuation concept can be seen. By adjusting the control element 80, 180 from one of the switch-off position A of the switch 51, 151 associated position in the direction of one of the closed position E of the respective switch 51, 151 associated position simultaneously securing device 70 is actuated by the securing position S in the release position F. However, if the fuse 70 trips, i. Moves from the release position F in the securing position S, at least one renewed key press or a renewed operating action in both switch assemblies 50, 150 is necessary, for example by renewed, conscious pressing on the control element 80 or a renewed rotation of the control element 180. The operator is therefore aware that the fuse has fired. Thus, he can specifically fix an error situation, for example, that the hand tool 90 use in an adequate, less power-consuming work area.

In a function as a residual current circuit breaker, the safety device 70, for example, perform a current comparison between the lines 31, 33.

In the circuit according to FIG. 12 which is essentially the circuit according to FIG. 7 corresponds and in this respect carries the same or similar reference numerals, the securing device 70 secures both the current flow Im via the suction motor 13, and the current flow Is via the connecting device 23 from. The total current Iges flowing via the line 33 initially flows via the safety device 70 with the switching contact 71, so that the securing device 71, the exceeding of a predetermined total current, for example, 16 amps at 230 volts AC voltage in the backup position S. The safety device 70 thus triggers. However, when the securing device 70 is in its release position F, a current Is supplying the connection device 23 can flow via a line 343 between the securing device 70 and, for example, the socket 25. At the output of the safety device 70, the switching contact 52 is connected via the already explained line 242. Thus, the motor current Im supplying the suction motor 13 can flow via the line 242. The total current or total current Iges is thus formed by the sum of the two currents Im and Is, ie the sum of motor current and current for the connection device 23.

In the circuit variant according to FIG. 13 , which is similar to the circuit according to FIG. 6 , the switch arrangement 50 is connected between the connection 28 and the securing device 70, so that the current flowing via the suction motor 13 and the connection device 23 can be switched centrally via the switch arrangement 40. Unlike the circuit according to FIG. 6 In contrast, the connecting line 39 is connected to the power supply of the suction motor 13 with the motor current Im as well as the connecting line 42 to the output of the safety device 70. About the connecting line 42 of the connecting device 23 supplying current Is flowing, which in turn forms the total current Iges together with the motor current Im, which is secured by the fuse device 70 as a whole.

Claims (16)

1. Suction device for separating particles from a suction flow, with a suction motor (13) for generating the suction flow and with a suction device housing (11) in which the suction motor (13) and a dust collecting chamber (14) for collecting the particles separated from the suction flow are located, wherein an electric connecting device (23), in particular a socket, is located on the suction device housing (11) for providing an electric supply voltage (V) for an electric load, in particular a hand-operated power tool, wherein the suction device (10) has a switch assembly (50) with an electric switch (51), which is movable by means of a manually operated control (80) between an off position (A), in which the suction motor (13) cannot be switched on, and an on position (E), in which the suction motor (13) can be or is switched on, characterised in that the switch assembly (50) has a safeguarding device (70) for the electric connecting device (23), which is separate from the switch (51) and which, if there is at least one electric fault condition at the connecting device (23), switches from an enabling position (F), in which the supply voltage (C) is applied to the connecting device (23), to a safeguarding position (S), in which the supply voltage (V) is disconnected from the connecting device (23), and in that the safeguarding device (23) can be actuated using the control (80) between the safeguarding position (S) and the enabling position (F), in particular from the safeguarding position (S) to the enabling position (F).
2. Suction device according to claim 1, characterised in that the switch and the safeguarding device (70) are located in a common housing and/or form an integral device, and/or in that the connecting device has an earthing contact (27), which cannot be influenced by the safeguarding device (70) in particular, and/or is provided and designed to provide an AC voltage of e.g. 230 V, 110 V or 120 V.
3. Suction device according to claim 1, characterised in that the switch (51) and the safeguarding device (70) are separate switching elements and/or located in separate housings, wherein it is advantageously provided that the suction device has a holder for the safeguarding device (70) and the switch (51), the holder having receptacles, in particular latching receptacles and/or plug-in receptacles. for the accommodation of the switch and the safeguarding device (70).
4. Suction device according to any of the preceding claims, characterised in that the safeguarding device (70) has a holding arrangement, e.g. a latching arrangement (78), for holding the safeguarding device (70) and/or an actuating element (75) of the safeguarding device (70) in a position assigned to the enabling position (F).
5. Suction device according to any of the preceding claims, characterised in that the control (80) can be moved, without moving the safeguarding device (70) from the enabling position (F) into the safeguarding position (S), from a position assigned to the on position (E) of the switch (51) into a position assigned to the off position (A) of the switch (51).
6. Suction device according to any of the preceding claims, characterised in that the switch (51) and the safeguarding device (70) have an actuating element (55, 75) each, which can be actuated by the control (80), and/or in that the control (80) is permanently coupled to the switch (51), so that the switch (51), if the control (80) is moved, is forcibly actuated between the off position (A) and the on position (E).
7. Suction device according to any of the preceding claims, characterised in that there is a free travel between the control (80) on the one hand and the switch (51) and/or the safeguarding device (70) on the other hand, so that the control (80) can be moved without actuating the switch (51) or the safeguarding device (70).
8. Suction device according to any of the preceding claims, characterised in that the switch (51) is designed as a pushbutton which can be moved by consecutive operation from the off position (A) into the on position (E) and from the on position (E) into the off position (A), and/or in that the safeguarding device (70) is designed as a pushbutton movable by operation from the safeguarding position (S) into the enabling position (F), and/or in that there is a distance between the or an actuating element (75) of the safeguarding device (70) and the control (80) if the safeguarding device (70) adopts the enabling position (F) and the control (80) is moved into a position assigned to the off position (A) of the switch.
9. Suction device according to any of the preceding claims, characterised in that there is a free travel between the actuating element (75) of the safeguarding device (70) and the or a control (80), so that the control (80) can be moved, without moving the actuating element (75) of the safeguarding device (70) from the enabling position (F) into the safeguarding position (S), from a position assigned to the on position (E) of the switch (51) into a position assigned to the off position (A) of the switch (51).
10. Suction device according to any of the preceding claims, characterised in that the control (80) has an actuating gate (185) and/or an actuating chamfer (186) and/or an actuating projection (83; 183) for actuating the safeguarding device (70), in particular an actuating element (75) of the safeguarding device (70), from the safeguarding position (S) into the enabling position (F).
11. Suction device according to any of the preceding claims, characterised in that the safeguarding device (70) is designed to safeguard only the connecting device (23) and/or to safeguard the connecting device (23) and at least one further electric component, in particular the suction motor (13) of the suction device, and/or in that the safeguarding device (70) has, for switching the supply voltage (V) for the connecting device (23), in particular exclusively, a switching contact (71), which can be moved between an electrically closed position, in which the supply voltage (V) is applied to the connecting device (23), and an electrically open position, in which the supply voltage (V) is not applied to the connecting device (23).
12. Suction device according to any of the preceding claims, characterised in that it has a connecting line (18) for connection to a power supply network and/or an electric energy storage assembly or a connecting interface for an energy storage assembly for providing electric energy for the electric connecting device (23) and/or the suction device and/or a switching device (60) for switching the suction motor (13) on and off as a function of a use of the connecting device (23) or a flow of current across the connecting device (23).
13. Suction device according to any of the preceding claims, characterised in that the switch (51) can be moved by means of the control (80) into the off position (A) and two on positions (E), wherein one of the on positions is assigned to a continuous operation of the suction motor and the other on position is assigned to an operation of the suction motor (13) in response to a use of the connecting device (23) and the safeguarding device can by means of the control be moved from the safeguarding position (S) into the enabling position (F) if the switch (51) is moved from the off position (A) into either of the on positions.
14. Suction device according to any of the preceding claims, characterised in that the safeguarding device (70) has a thermal circuit breaker switching towards the safeguarding position (S) if a thermal threshold value is exceeded and/or an earth leakage circuit breaker and/or a current protection switch switching towards the safeguarding position (S) if a maximum current value is exceeded at the connecting device (23).
15. Suction device according to any of the preceding claims, characterised in that the control (80) is mounted rotatably and/or for linear movement and/or has at least one film switch or a film cover (86) or an elastic cover, and/or in that the connecting device (23) is electrically connected via the safeguarding device (70) to a connecting line (18) or a connection (28) for a connecting line (18) of the suction device (10) for connection to a power supply network, and/or to a connecting interface for an electric energy storage assembly, in particular outside the safeguarding device (70), without any interconnected electric or electronic components, and/or in that the safeguarding device (70) is designed to connect the connecting device (23) to a neutral conductor or earth conductor in the enabling position (F) and to disconnect the connecting device (23) from the neutral conductor or earth conductor in the safeguarding position (S).
16. Suction device according to any of the preceding claims, characterised in that the safeguarding device (70) is designed and/or arranged to safeguard the total current (Iges), which comprises a current (Is) flowing across the connecting device (23) and at least one current required for the operation of the suction device (10), in particular a current (Im) flowing across the suction motor (13), and/or all currents flowing through a connection (28) for the energy supply of the suction device (10) and the connecting device (23) for the electric load.

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