EP2862493A1 - Suction hose for a vacuum cleaner, and system equipped with the same - Google Patents

Abstract

The invention relates to a suction hose (10) for a vacuum cleaner (60), in particular for operation with a hand-held power tool (80), with a flexible dust-removal hose body (11) which extends in a longitudinal direction (20) of the suction hose (10 ) extending suction flow channel (13) for guiding a suction flow (2) to the vacuum cleaner (60) and with a by a reinforcing fluid (3), in particular compressed air, acted upon amplification channel structure (14), wherein the reinforcing channel structure (14) when acted upon by the reinforcing fluid (3) acts to stiffen the dust-evacuated hose body (11), the dust-evacuated hose body (11) being disposed in a sheath hose body (12) and the reinforcing channel structure (14) being interposed between the shroud (19) Dust removal hose body (11) and the sheath hose body (12) is provided. In the suction hose (10) it is provided that the dust removal hose body (11) and the sheath hose body (12) by a plurality of connection points (15) are interconnected, in the longitudinal direction (20) of the suction hose (10) to each other exhibit

Description

The invention relates to a suction hose for a vacuum cleaner, in particular for operation with a hand-held power tool, with a flexible dust-removal hose body having a suction flow channel extending in a longitudinal direction of the suction hose for guiding a suction flow to the vacuum cleaner and with a through a reinforcing fluid, In particular, compressed air, acted upon amplification channel structure is provided, wherein the reinforcing channel structure when acted upon by the reinforcing fluid in the sense of stiffening the dust removal hose body acts, the dust removal hose body is disposed in a sheath hose body and the reinforcing channel structure in a space between the dust discharge hose body and is provided the sheath hose body. The invention further relates to a system with a suction hose and a vacuum cleaner and / or a hand-held power tool as a terminal.

Such a suction hose is eg in DE 10 2009 023 495 A1 described.

However, the production of such a suction hose is extremely complicated. It must be applied as a reinforcing channel structure in the interior of the dust discharge hose body or on its outer circumference, for example, tubular structures, so to speak, small hoses, which is structurally difficult proves. For example, one can make such a tube by extrusion. However, an extruded suction hose is usually not flexible enough. For example, when the reinforcing channel "hoses" are disposed on the outer periphery of the dust discharge hose body, they catch on the ground. Such a hose is for example not good for sucking dust when grinding a motor vehicle.

It is therefore the object of the invention to provide an improved suction hose and a system containing this with a vacuum cleaner and / or hand-held machine tool.

To solve the problem is provided in a suction hose of the type mentioned that the dust removal hose body and the sheath hose body are connected by a plurality of joints with each other, which have in the longitudinal direction of the suction hose to each other.

To solve the problem, a system with a suction hose of this type and a vacuum cleaner and / or a hand-held power tool is provided as a terminal having a connection for the suction hose, wherein the terminal is a gain fluid source, in particular a compressed air generator and / or an exhaust air source, for pressurizing the reinforcing fluid for the reinforcing channel structure.

The terminal also preferably has at least one outflow port through which the boost fluid can flow into the boost channel structure. The outflow opening is preferably provided on a connection element, which has an inlet opening for the suction flow to the. The inflow opening and the outflow opening are preferably concentric. It is preferred if the outflow opening extends annularly around the inflow opening. It can too a plurality of annularly arranged around the inflow opening may be provided.

Furthermore, it is advantageous if the terminal has a controller for controlling the amplification fluid source as a function of the activation of a drive motor provided, for example, for driving a suction turbine or a tool. For example, it may be provided a sequential control that the amplification fluid source is initially driven in advance and then the drive motor, so that there is a kind of support flow in the reinforcing channel structure, for example, before the suction operation begins or the tool is driven. It is also possible that the amplification fluid source is switched off after the drive motor for the suction turbine or the tool, is trailing, so to speak.

A preferred embodiment of the invention provides that the controller drives the gain fluid source in response to a power of the drive motor of the terminal, i. For example, at higher suction power, the gain fluid source drives to a higher power output.

It is a basic idea of the present invention that, as it were, there are at least two tubular sheaths or tubular bodies, of which an inner tubular body delimits the suction flow channel, which is known per se, and an arrangement of one or more outer sheath tubular bodies enveloping this inner dust-evacuated tubular body is provided so that at least one space between the outermost shell-tube body and the inner dust-collecting tubular body is provided for forming the reinforcing channel structure. It is understood that a multi-layer sheath hose body can be provided, that is, that it is an outer sheath hose body, so to speak and having a arranged in the interior of this outer shell tube body inner tube body or more such inner tube body. Of course, further fluid channels of the reinforcing channel structure can be provided between the individual layers of the sheath hose body. However, this does not have to be the case, ie it is also possible, for example, for the outer tubular body to constitute a protective jacket, so to speak, while the inner tubular body or bodies together with the dust-removal tubular body delimit the reinforcing channel structure.

The connection channel structure can thus be created in a very simple manner by providing a multiplicity of connection points between which, however, there are gaps, i. the requirement for a pressure-tightness or fluid-tightness are, so to speak, placed only on the outermost hose body and the innermost hose body, so that the reinforcing channel structure is at least somewhat pressure-tight, while in the space or the spaces between these substantially dense hose bodies the reinforcing fluid flows.

The boosting fluid is preferably air or compressed air, but may also include a liquid or other gas.

It is also preferred if the connection points in the circumferential direction of the suction hose have distances from each other. Thus, therefore, the reinforcing fluid can now freely flow or flow in the space between the hose bodies in the circumferential direction and in the longitudinal direction of the suction hose and unfold its reinforcing function optimally and / or evenly.

The joints ensure that the hose body, for example, in the circumferential direction and in the longitudinal direction together are fixed so that, for example, the hose body does not twist.

An advantageous embodiment of the invention provides that the connection points are provided in a matrix-like manner on an outer circumference of the dust removal hose body. Conveniently, a point-like structure is provided, i. that evenly or unevenly distributed a plurality of connection points between the dust-removal hose body and the sheath hose body enclosing it is provided. As said, the next radially outer layer may be, so to speak, an inner tube body of the jacket tube body.

It should be noted that, of course, the individual layers of the sheath hose body, that is its outer, inner, and optionally intermediate hose body. can also be connected to one another with a plurality of connection points, which have distances from each other in the longitudinal direction of the suction hose and / or in the circumferential direction of the suction hose. Also, the matrix-like connection structure is possible in this embodiment as well as also the embodiment described below in connection with the sheath hose body and the dust removal hose body.

Namely, it is preferred if the dust removal hose body and the sheath hose body are connected directly to each other or to the existing connection points. Namely, the difference with the prior art is that no hoses or the like of other complicated structures for forming the reinforcing channel structure are necessary, but that the sheath hose body and the dust exhaust hose body are directly connected to each other and thus forming the reinforcing body structure. It is possible, for example, that the Hose body over extending in the longitudinal direction of the suction hose connecting points, which may also be continuous, are interconnected. Consequently, a channel structure with channels extending in the longitudinal direction can thus also be formed as a reinforcing channel structure in that the tube bodies are directly connected to one another, for example adhesively bonded, sewn or the like.

The connection points between the respective hose bodies can provide, for example, that the hose bodies are glued together, interwoven with each other or are connected to each other by individual threads, for example, as it were, can be sewn together. A welding or braiding of the hose body is readily possible and advantageous. The aforementioned joining techniques are of course combinable, i. that the hose body are woven together at a respective connection point, for example, and additionally glued.

The joints can have different geometries. For example, a longitudinal shape having or linear connection points readily possible. But punctiform, circular or the like no longitudinal shape having joints are of course possible. Particularly preferred are dome-like joints, it being possible that, for example, only one hose body at a respective connection point has a dome whose bottom is connected to the other hose body. This other hose body does not need to have a dome at the junction, but may, for example, be continuous flat. But it can also be mutually oriented dome-like connection points provided on the respective hose bodies be. Then it is expediently provided that the respective bottom surfaces of the dome are connected to each other.

The reinforcing channel structure is expediently at least substantially or completely closed at one longitudinal end of the suction hose. At the opposite or other longitudinal end of the suction hose, it is expedient to provide an inflow opening for the inflow of the reinforcing fluid into the reinforcing channel structure. Thus, the suction hose can be inflated so to speak, i. the reinforcing fluid enters the reinforcing channel structure and remains trapped there, so to speak.

However, an embodiment is also possible in which, for example, inlet openings are provided at both longitudinal ends of the suction hose, through which the reinforcing fluid can flow into the reinforcing channel structure. In this configuration, it is possible that between the longitudinal ends, for example, longitudinally, a kind of bulkhead wall is provided, so that the suction hose can be pumped up from both sides, so to speak.

The reinforcing channel structure may be sealed in one embodiment of the invention so that the reinforcing fluid can not or hardly escape from the reinforcing channel structure. But it is also possible that a leak is provided, that is, for example, that one or more leakage openings are provided or at least one of the hose bodies, which limit the reinforcing channel structure, is porous. A particularly preferred embodiment of the invention provides that the so-called inner hose body, namely the dust removal hose body, has at least one leakage opening towards the suction flow channel or is porous, so that the reinforcement fluid can flow from the reinforcement channel structure into the suction flow channel. It is preferred if the Reinforcing fluid, so to speak on the inner wall of the Saugstromkanals along, so that the suction flow can thereby flow with as little friction and losses in Saugstromkanals. The design as a porous body or having leakage openings hose body also has the advantage that a kind of cleaning takes place, ie that particles do not adhere to the inner wall of the Saugstromkanals or, if that is already done, are removed by the outflowing reinforcing fluid again.

A preferred embodiment of the invention provides that the suction hose as a whole or at least one of the hose bodies consists of a textile material or has a textile material. In this embodiment of the invention, however, it does not depend on the characterizing feature of claim 1, i. It is quite possible that the reinforcing channel structure is otherwise formed, that is, for example, extending in the longitudinal direction of the suction hose reinforcing channels are arranged on the dust removal hose body outside or inside and this hose body is made of a textile material. Of course, the reinforcing channel structure may also be limited by walls made of textile material, but need not. It is also possible, for example, to provide reinforcing duct hoses or conduits made of another material, for example plastic, which have long since extended from a textile material dust-collecting hose body.

A sliding coating on the base material of the respective hose body, for example, the sheath hose body, helps that the suction hose can be easily moved past a substrate. But it is also possible that, for example, the dust-removal hose body has a sliding coating to reduce the friction in Saugstromkanal.

The sheath hose body is expediently provided on the outside with a cut-resistant or cut-inhibiting coating. Furthermore, a dirt-resistant coating is advantageous, so that the suction hose is not dirty on the outside. A further embodiment of the invention provides, for example, that the sheath hose body has a cut-resistant or cut-inhibiting fiber structure. Of course, such a fiber structure may also be provided with an accompanying coating or a dirt-resistant coating. Furthermore, it is advantageous if the suction hose on the outside is smooth or rounded or both. This helps to ensure that the suction hose does not catch on a substrate.

The dust removal hose body and / or the jacket hose body are expediently seamless. But it is also possible that at least one of the hose body, for example, the sheath hose body having a seam, for example, in the circumferential direction and / or longitudinal direction of the suction hose is sewn. For example, it is possible for a seam to be recognized at the cross-section of a respective hose body, this seam then extending in the longitudinal direction of the suction hose. But it is also possible that a hose body has sewn-together sections in the longitudinal direction. The at least one seam then extends, for example, around the respective circumference of the hose body.

Of course, beyond the so-called inflatable reinforcement channel structure, it is also possible for additional mechanical reinforcements to be provided in order to stabilize the suction hose, in particular during suction operation. For example, it is possible that at least over a partial section in addition to the reinforcing channel structure extending in the longitudinal direction of the suction hose fiber reinforcement structure is provided. Also extending in the longitudinal direction of the suction hose plastic or wire spiral is advantageous without further ado. Thus, for example, comparatively soft mechanical reinforcing components (fiber reinforcing channel structure and / or plastic or wire spiral) may be provided which, however, assist the reinforcing channel structure which is inflated with the reinforcing fluid, as it were, in stabilizing the suction hose.

The suction hose according to the invention can be electrically conductive, for example, for removing electrostatic charges. For example, it is possible that electrically conductive fibers, a wire mesh or an electrically conductive foil are provided in the material of, for example, one or more of the tube bodies.

The suction hose according to the invention may also have other functions, for example, have additional electrical or fluidic lines.

It is advantageous, for example, if the suction hose has at least one electrical connection line extending in the longitudinal direction of the suction hose, for example an electrical power supply line, for connecting the vacuum cleaner to an electrical device arranged at the longitudinal end of the suction hose remote from the vacuum cleaner. The device is, for example, a hand-held machine tool. Thus, in a conventional manner, the suction hose, so to speak record a power or power line or the like, through which the vacuum cleaner supplies the electrical device. If the vacuum cleaner then still in a known manner current monitoring means for an electrical connection to which the electrical connection line is connected, he can see so to speak, if the operated electrical device and in response to his suction turbine off or on and possibly also generate the amplifying fluid and / or pressurize.

It is also advantageous if the suction hose has at least one compressed air line extending in its longitudinal direction or a compressed air channel for the compressed air supply of a compressed air device, e.g. a grinding machine having. The compressed air line may be separate line or provided in a compressed air channel, which is an integral part of the suction hose. The vacuum cleaner may have a compressed air connection for the compressed air supply. The use of the compressed air connection on the basis of the compressed air line can optionally monitor the vacuum cleaner on the basis of compressed air monitoring means depending on its suction turbine off or on and possibly also generate the amplifying fluid and / or pressurize.

The electrical connection line and / or the compressed air duct or the compressed air line are expediently arranged in the interior of the sheath hose body or the dust removal hose body, i. protected. An arrangement of the electrical connection line and / or the compressed air channel or the compressed air line between the jacket tube body and the dust removal tube body is also preferred. Furthermore, the electrical connection line or a compressed air channel or the compressed air line can be provided in a channel of the jacket hose body or the dust removal hose body.

At least one of the hose bodies, for example the dust removal hose body, for example, has an arrangement of electrically conductive fibers for electrostatic discharge of the suction hose. The fibers can also be used to form a electrical connection line between the longitudinal ends of the suction hose serve.

A cross section of the Saugstromkanals between the longitudinal ends may well be constant. But it is also possible that variable cross-sections are provided, i. For example, the cross section at one longitudinal end is greater than at the other longitudinal end. The transition can be continuous, i. that, for example, results in a conical shape. The term "cross-section" is preferably oriented on the extended or unrolled state of the suction hose, in particular on the state of the suction hose when the reinforcing channel structure is subjected to the reinforcing fluid, i. the suction hose is inflated so to speak.

Figur 1

eine perspektivische Schrägansicht eines Systems bestehend aus einem Staubsauger und einer Hand-Werkzeugmaschine, die über einen Saugschlauch gemäß einer ersten Ausführungsform miteinander verbunden sind,

Figur 2

eine perspektivische Schrägansicht eines Teils des Saugschlauchs gemäß Figur 1,

Figur 3

eine Frontalansicht auf den Saugschlauch gemäß Figur 2,

Figur 4

ein Querschnitt des Saugschlauchs gemäß Figur 3, etwa entlang einer Schnittlinie A-A,

Figur 5

eine perspektivische Schrägansicht eines Systems bestehend aus Staubsauger und Hand-Werkzeugmaschine, die über einen Saugschlauch gemäß einer zweiten Ausführungsform miteinander verbunden sind,

Figur 6

eine perspektivische Schrägansicht eines Teils des Saugschlauchs gemäß Figur 5,

Figur 7

eine Frontalansicht des Saugschlauchs gemäß Figur 6,

Figur 8

einen Querschnitt des Saugschlauchs gemäß Figur 7, etwa entlang einer Schnittlinie B-B,

Figur 9

eine schematische Frontalansicht eines Anschlusses für einen Saugschlauch, beispielsweise gemäß der obigen Ausführungsformen,

Figur 10

eine Frontalansicht eines Saugschlauchs etwa entsprechend derjenigen gemäß Figur 3, jedoch mit zusätzlichen elektrischen Leitern,

Figur 11

eine Abwandlung des Saugschlauchs gemäß Figur 10 mit einer alternativen Anordnung der elektrischen Leiter

Figur 12

eine schematische Frontalansicht eines Anschlussstücks des Saugschlauchs gemäß Figur 1.

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

FIG. 1

an oblique perspective view of a system consisting of a vacuum cleaner and a hand-held power tool, which are connected to each other via a suction hose according to a first embodiment,

FIG. 2

an oblique perspective view of a portion of the suction hose according to FIG. 1 .

FIG. 3

a frontal view of the suction hose according to FIG. 2 .

FIG. 4

a cross section of the suction hose according to FIG. 3 , approximately along a section line AA,

FIG. 5

an oblique perspective view of a system consisting of vacuum cleaner and hand-held machine tool, which are connected to each other via a suction hose according to a second embodiment,

FIG. 6

an oblique perspective view of a portion of the suction hose according to FIG. 5 .

FIG. 7

a front view of the suction hose according to FIG. 6 .

FIG. 8

a cross-section of the suction hose according to FIG. 7 , approximately along a section line BB,

FIG. 9

a schematic front view of a connection for a suction hose, for example according to the above embodiments,

FIG. 10

a frontal view of a suction hose approximately corresponding to those according to FIG. 3 but with additional electrical conductors,

FIG. 11

a modification of the suction hose according to FIG. 10 with an alternative arrangement of electrical conductors

FIG. 12

a schematic front view of a fitting of the suction according to FIG. 1 ,

A system 1 ( FIG. 1 ) and a system 101 ( FIG. 5 ) have partly the same or similar components, so that the same reference numerals are used. To illustrate differences, the reference numerals are partially different from each other by 100, that is, the reference numerals for the system 1 are in the numerical range of 1-99, while the reference numerals for the system 101 are in the range of 100-199.

A suction hose 10, 110 connects a vacuum cleaner 60, 160 with a hand-held power tool 80, 180. In the suction hose 10, 110, particles that are generated during operation of the hand-held power tool 80, 180, for example chips, dust or the like, can reach the vacuum cleaner 60 , 160 flock.

The hand-held machine tool 80, 180 is an example of a circular saw, of course, other types of hand-held machine tools are possible, for example, jigsaws, angle grinder or the like. A particularly preferred field of application are, for example, polishing devices or grinding devices which are used for processing sensitive substrates, for example a body of a motor vehicle. In this case, it is advantageous that the suction hose 10, 110 gently bypasses the workpiece, i. For example, no scratches on the paint of a body caused. This will become clear later.

In a housing 81 of the hand machine tool 80, 180, a drive motor 82, for example an electric drive motor, for driving a tool 83 is arranged. Of course, also compressed air-powered hand-held machine tools are readily usable within the scope of the invention.

On the underside of the housing 81, a guide 84, for example a saw table, is arranged, with which the hand-held machine tool 80, 180 can be guided along a substrate, for example a workpiece plate. The tool 83 saws, for example, a saw slot 89 in the substrate or the workpiece. This fall chips, sawdust or the like. This blows the hand machine tool 80, 180 at a hose connection 85 or at least provides the hose connection 85 to a suction of chips, sawdust or the like other particles available.

Of course, the hand-held power tool 80 could also be a battery-operated machine, ie a hand-held power tool that can also be operated without an electrical power supply.

On a handle 87 of the hand-held machine tool 80, an electrical switch 88, for example, a pressure switch, arranged for switching on and off of the drive motor 82.

The vacuum cleaner 60, 160 has a housing 61. The vacuum cleaner 60, 160 can be moved, for example, on a substrate by means of rollers. In any case, a preferred field of application of the invention is the operation of the suction hose 10, 110 in connection with mobile vacuum cleaners. At this point, it should be mentioned that the use of suction hoses according to the invention is possible, for example, in stationary suction systems, which allow the connection of the suction hose with a hand-held machine tool or other electrical device to be sucked from the dust, particles or the like.

In the housing 61 of the vacuum cleaner 60, 160, a suction turbine 62 is arranged, which generates a suction flow 2, which can flow via a suction port 65 into a dust collecting chamber 63 in the housing 61. In the dust collection chamber 63, a dust bag 64 can optionally be arranged.

On the housing 61, for example, the front side, there is an electrical outlet 66, which can serve for the electrical power supply of the hand-held power tool 80, 180.

By means of a suction power switch 67 it is possible to set the suction power of the vacuum cleaners 60, 160 to a desired size. Exhaust air 4 can flow from the suction turbine 62 into the environment via an outlet opening which is not described in more detail.

The suction flow 2 is shown in the drawings with large arrows. The flow of the suction flow 2 in the interior of the housing 61 of the vacuum cleaner 60, 160 is shown schematically with such arrows.

An inner dust-removal hose body 11, 111 has a suction flow channel 13, through which the suction flow 2 can flow. The dust removal hose body 11, 111 is in turn received in a jacket tube body 12, 112. Thus, so to speak, the sheath hose body 12, 112 houses the dust removal hose body 11, 111 or forms its outer sheath.

Between the jacket tube body 12, 112 and the dust removal tube body 11, 111, a gap 19, 119 is present, which at least partially forms or receives a reinforcing channel structure 14, 114. The hose body 11, 12; 111, 112 are connected to each other at connection points 15, 115. As a result, the hose bodies 11 and 12 and 111 and 112 are connected to each other at different, matrix-like connection points 15, 115, so they can not rotate relative to each other and are also with respect to the longitudinal direction 20 of each suction hose 10, 110 fixed to each other.

Between the dust-removal hose bodies 11, 111 and the sheath hose bodies 12, 112, the intermediate space 19, 119 and thus in any case a distance, which expands upon application of the reinforcing channel structure 14, 114 with a reinforcing fluid 3, in particular compressed air.

The connection points 15, 115 are spaced from one another with respect to the longitudinal direction 20 of the suction hose 10, 110. For example, they each have a longitudinal spacing 27, 127.

Distances are also present in the circumferential direction, namely circumferential distances 26, 126 between the connection points 15, 115.

The distances in the longitudinal direction 20 and in the circumferential direction are present approximately the same. In the longitudinal direction 20 of the suction hose 10, 110 extending rows of connection points 15, 115 are approximately offset by half the distance between two connection points 15, 115 to each other, so that a connection point 15, 115 of the one row between two connection points 15, 115 of the other series of connection points 15, 115 with respect to the longitudinal direction 20 is arranged.

The proposed in the drawing distance and arrangement of the individual connection points 15, 115 is to be understood only as an example. In other words, more or fewer connection points can be provided or it need not be that the connection points over the entire longitudinal length of the suction hose 10, 110 have the same distances in the circumferential direction and / or in the longitudinal direction to each other.

The connection points 15, 115 each form a depression 16, 116 in the jacket tube body 12, 112. At the connection points 15, 115, the hose body 11, 12 and 111, 112 are directly connected to each other, for example glued together, welded or the like. It can also be imagined that, for example, an arrangement of punches acts radially from the outside on the sheath hose body 12, 112 and thus connects it to the inner dust evacuation hose body 11, 111, for example glued, welded or the like.

The connection points 15, 115 form recesses 16, 116 from the sheath hose body 12, 112. From the opposite side, namely the dust-removal hose body 11, 111 ago depressions 28, 128 are also formed.

The depressions 16, 116, 28, 128 each have side walls 17, 117 and bottoms 18, 118. In the region of the bottoms 18, 118, the shell tubular bodies 12, 112 and the dust removal tubular bodies 11, 111 are connected to one another, in particular materially bonded connected together, for example glued. Also a weave, a connection by means of threads or the like is advantageous.

While the recesses 16, 28 are relatively flat, the recesses 116, 128 are relatively deep, even dome-like. As a result, large inter-communicating chambers 129 are provided between the individual connection points 115, i. that the suction hose 110 stiffened optimally when exposed to the reinforcing fluid 3.

The recesses 116, 128 each have a dome-like structure, i. they have cohesively connected or integral bottoms 118.

The tubular body 11, 111 and 12, 112 are presently made of textile material, that is, of a fabric which is relatively flexible. As a result, the jacket tube body 12, 112 nestle against a sensitive substrate. In particular, this avoids that suction hoses 10, 110 damage a substrate.

On the inside of the suction flow channel 13 facing the dust removal hose body 11, 111 leakage openings 21, 121. Through the leakage openings 21, 121, a portion of the reinforcing fluid 3 in the interior of the dust discharge hose body 11, 111, at least in the suction flow channel 13 to flow. As a result, the wall of the dust-removal hose body 11, 111 is expediently cleaned off. Advantageously, a support flow 22, 122 forms, so that the suction flow 2 on the inner wall of the Saugstromkanals 13 has as little resistance. The adhesion of particles to the inner wall of Saugstromkanals 13 is thereby avoided or at least significantly reduced.

The suction hose 10, 110 has, as it were, a plurality of nested or onion-like arranged hose body, in the present case in each case two, whereby as already explained at the outset further tube bodies may be provided.

The sheath hose body 112 could also include an outer sheath hose body 112a and an inner hose body 112b. The inner tube body 112b is connected at the connection points 115 with the dust discharge tube body 111 and the outer tube body 112a.

Of course, it is possible to provide the textile material or other flexible material from which the tubular bodies 11, 111, 12, 112 consist, for example, with a cut-resistant fibrous structure 30. It is also possible that, for example, a coating 31 is provided (indicated in FIG FIG. 4 ), for example a lubricious coating or the like.

In addition to the reinforcing channel structure 14, 114, further reinforcing measures may also be taken, such as, for example, a single-turn plastic or wire spiral 32 in FIG FIG. 2 shown portion of the suction hose 10th

Finally, the over the entire longitudinal length or longitudinal direction 20 of the suction hose 10, 110 constant cross section in the inflated or inflated by the reinforcing channel structure 14, 114 state of the suction hose 10, 110 same cross-sectional size is not mandatory. In FIG. 4 For example, it is indicated that the suction hose may have a conical shape 33, that is, for example, a larger cross-section may be available in the region of the suction connection 65 of the vacuum cleaner 60 than in the region of the connection to the hand-held machine tool 80.

The jacket tube body 12 and / or the dust removal tube body 11 are preferably seamless. It is also possible that extends in the circumferential direction of a respective hose body 12, 13 and / or in the longitudinal direction 20 at least one seam. By way of example, a seam 50 in the longitudinal direction 20 is shown on the hose body 12.

In the following, measures are presented for applying the amplification fluid 3 to the amplification channel structure 14, 114. The reinforcing fluid 3 in the systems 1, 101 is air, in particular compressed air.

The suction hose 10 is connected at a longitudinal end 37, for example, with a connection element 23 to the hand-held machine tool 80. An outflow opening 24 is preferably provided on the connecting element 23, which may advantageously be closable in order to allow a blow-off airflow 25 to flow out if appropriate and to adjust its size expediently. The blow-out air stream 25 flows, for example, in the direction of the kerf 89, so that any dust or other particles present there are blown away. The operator thus sees the work result a bit better.

But that is not in the foreground. In fact, it may also be that the connection element 23, in particular a type of tubular body, plug-in element or the like, is completely closed relative to the amplification fluid 3. Thus, therefore, the suction hose is in the range of the manual power tool 80 with respect to the reinforcing fluid 3 expediently completely closed pressure-tight. For example, the vacuum cleaner 60 serves to act on the suction hose 10 with the reinforcing fluid 3.

A variant may provide that a blow-out side of the suction turbine 62 via a return channel 71 at least a portion 5 of the exhaust air 4 in the direction of the suction port 65 blows, which then forms the reinforcing fluid 3. The suction turbine 62 forms a Thus, the suction turbine 62 forms a gain fluid source 70 for generating the boosting fluid 3. The advantage here is that the pressure of the boosting fluid 3 increases at higher suction power, ie, stronger negative pressure of the intake flow 2, and the boosting passage structure 14 becomes more stable ,

Another variant may provide that on the return channel 71, a compressed air generator 72 is arranged, which amplifies the pressure of the part 5 of the exhaust air 4 in the return channel 71, so to speak represents an amplifier or booster.

A further variant may provide that the compressed air generator 72 is not connected to the exhaust side of the suction turbine 62, that is responsible for generating the pressure on the reinforcing fluid 3 alone.

The power of the compressed air generator 72 can be advantageously adjusted by an operator with an operating switch 68. Alternatively or additionally, a controller 75 may be provided which adjusts the power of the compressed air generator 72 in dependence on the current power of the suction turbine 62, e.g. regulates or proportionally carries. The controller 75 may be adjustable by means of the control switch 68, e.g. to set a ratio between the current power of the suction turbine 62 and the associated power of the compressed air generator 72.

Advantageously, the controller 75 is configured to initially provide for the generation of the boosting fluid 3 before the suction flow 2 is generated. For example, At first, the controller 75 turns on the compressed air generator 72 before the suction turbine 62 starts.

The suction connection 65 has, for example, concentrically an inner inflow opening 74 for connection to the suction flow channel 13 of the suction hose 10 at a longitudinal end 38 and a radial one outer, with the inflow opening 74 concentric outflow opening 73 for the outflow of the reinforcing fluid 3 and for the inflow of the reinforcing fluid 3 in the reinforcing channel structure 14 on. For example, it is also possible to provide a plurality of outflow openings 73a, in particular annularly arranged around the inflow opening 74.

A connecting piece 34 or connection element on the longitudinal end 38 of the suction hose 10 connected to the vacuum cleaner 60 is complementary to that in FIG FIG. 9 shown suction port 65, so that the inflow opening 74 communicates with an outflow opening 35 of the Saugstromkanals 13, the outflow opening 73 with an inflow opening 36 which is connected to the reinforcing channel structure 14. For example, it is also possible to provide a plurality of inlet openings 36a arranged in particular in a ring around the outflow opening 35.

System 101 shows an alternative concept. There, for example, the hand machine tool 180 has a booster fluid source 190 on board. This may, for example, be the drive motor 82 or a turbine driven by it. From the drive motor 82, a guide channel 191 (corresponding to the return channel 71 in the vacuum cleaner 60) leads in the direction of the hose connection 185 for the suction hose 110.

The hose connection 185 may have a similar structure as the suction connection 65, ie concentrically an outflow opening for the suction flow 2 and radially outside at least one outflow opening for the reinforcing fluid 3. The flow direction of the reinforcing fluid 3 in the suction hose 110 in the illustrated configuration is the reverse of the suction hose 10 The connection element 123 corresponds, for example, to the connection piece 34.

By way of example, a pressure generator 192 is additionally shown in the hose connection 185. For example, this is a pump or the like for generating compressed air, which acts on the reinforcing channel structure 114 in accordance with reinforcing fluid 3, ie air.

Suction hoses according to the invention are also suitable for receiving additional connecting lines, namely electrical connecting lines, compressed air lines or the like. When in FIG. 10 illustrated embodiment of a suction hose 10a, a variant of the suction hose pull, for example, a receiving space 46 between the sheath hose body 12 and the dust removal hose body 11 is provided. There, the two hose body have a greater distance from each other. In the receiving space 46 extends an electrical connection line 40, which has, for example, two or three wires 41 in a jacket 42. Of course, the connecting line 40 may also have only one or more wires or electrical connections.

At the longitudinal end regions of the suction hose 10a, the connecting line 40 is led out with a first connection 43 and a second connection 44. The connection 43 can be plugged into the socket 66 of the vacuum cleaner 60, for example, while the other terminal 44, also a connector, can be plugged into the electrical connection 86 of the hand-held machine tool 80.

Of course, a compressed air line 45 can also run in the receiving space 46.

In the suction hose 10b according to FIG. 11 has the hose body 11, so to speak, a pocket in the direction of Saugstromkanals 13, that is, an additional wall 147, which together with the peripheral wall of the Dust removal hose body 11 defines a receiving space 146 for the connecting lines 40.

Claims (15)

A suction hose for a vacuum cleaner (60; 160), in particular for operation with a hand-held power tool (80; 180), with a flexible dust-removal hose body (11; 111) extending in a longitudinal direction (20) of the suction hose (10; 110) extending suction flow channel (13) for guiding a suction flow (2) to the vacuum cleaner (60; 160) and is provided by a reinforcing fluid (3), in particular compressed air, acted upon amplification channel structure (14; 114), wherein the reinforcing channel structure ( 14, 114) when acted upon by the reinforcing fluid (3) acts in the sense of stiffening the dust-removal hose body (11, 111), the dust-removal hose body (11, 111) being arranged in a jacket hose body (12, 112) and the reinforcing channel structure (14; 114) is provided in a space (19; 119) between the dust-evacuating hose body (11; 111) and the sheath hose body (12; 112), characterized in that the Staubabfuh r-tube body (11; 111) and the sheath hose body (12; 112) are interconnected by a plurality of connection points (15; 115) which are spaced from one another in the longitudinal direction (20) of the suction hose (10; Suction hose according to claim 1, characterized in that the sheath hose body (12; 112) is multi-layered and has an outer sheath hose body (112a) and at least one inner hose body (112b) arranged in the interior of the outer sheath hose body (112a) at the connection points (15; 115) with the dust removal hose body (11; 111) is connected. Suction hose according to claim 1 or 2, characterized in that the connecting points (15; 115) in the circumferential direction of the suction hose (10; 110) have distances from each other. Suction hose according to one of the preceding claims, characterized in that the connection points (15; 115) are provided in a matrix-like manner on an outer periphery of the dust-removal hose body (11; 111). Suction hose according to one of the preceding claims or the preamble of claim 1, characterized in that the dust-removal hose body (11; 111) and the jacket hose body (12; 112) are directly connected to one another at the connection points (15; or the tubular bodies are glued together at the connecting points (15, 115) and / or interwoven and / or connected by threads and / or welded and / or interwoven. Suction hose according to one of the preceding claims, characterized in that it has punctiform and / or dome-shaped and / or longitudinal shape having connecting points (15; 115). Suction hose according to one of the preceding claims, characterized in that the reinforcing channel structure (14; 114) is at least substantially closed with respect to the longitudinal direction (20) at a central portion or at a longitudinal end (37) of the suction hose (10; An inlet opening for flowing the reinforcing fluid (3) into the reinforcing channel structure (14, 114) is provided at the longitudinal end (38) of the suction hose (10; Suction hose according to one of the preceding claims, characterized in that the dust removal hose body (11, 111) to the suction flow channel (13) towards at least one leakage opening (21; 121) or is porous such that the reinforcing fluid (3) from the reinforcing channel structure (14; 114) can flow into the suction flow channel (13). Suction hose according to one of the preceding claims, characterized in that the suction hose (10, 110) in total or at least one of the hose bodies, in particular the dust removal hose body (11, 111), consists of a textile material or has a textile material and / or one with a Slip coating (31) provided base material. Suction hose according to one of the preceding claims, characterized in that the sheath hose body (12; 112) is provided on the outside with a cut-resistant or cut-resistant and / or dirt-resistant coating (31) or has a cut-resistant or cut-inhibiting fiber structure (30) and / or on the outside smooth or rounded. Suction hose according to one of the preceding claims, characterized in that at least over a partial section in addition to the reinforcing channel structure (14; 114) extending in the longitudinal direction (20) of the suction hose (10; 110) extending fiber reinforcing structure and / or a plastic or wire spiral (32) and / or that it is electrically conductive to dissipate electrostatic charges. Suction hose according to one of the preceding claims, characterized in that it comprises at least one electrical connection line (40) extending in the longitudinal direction (20) of the suction hose (10, 110), in particular electrical power supply line, for connecting the vacuum cleaner (60; from the vacuum cleaner (60; 160) remote longitudinal end (37) of the suction hose (10; 110) arranged electrical device, in particular a hand-held power tool (80; 180) and / or at least one in its longitudinal direction (20) extending compressed air line (45) for compressed air supply of a compressed air device, wherein expediently provided that the at least one electrical connection line and / or the compressed air line (45) in the interior of the dust discharge hose body (11 111) or the jacket tube body (12; 112) or between the jacket tube body (12; 112) and the dust removal tube body (11; 111) or in a channel of the jacket tube body (12; 112) or the dust removal Tube body (11, 111) is arranged. Suction hose according to one of the preceding claims, characterized in that at least one of the hose bodies, in particular the dust removal hose body (11, 111), an arrangement of electrically conductive fibers for electrostatic discharge of the suction hose (10, 110) and / or for forming an electrical connection line (40) between the longitudinal ends of the suction hose (10; 110). Suction hose according to one of the preceding claims, characterized in that a cross section Saugstromkanals (13) between the longitudinal ends of the suction hose (10; 110), in particular in the extended or unrolled state of the suction hose (10; 110), is not constant and / or a conical Course (33). A system comprising a suction hose (10; 110) according to the preceding claims and a vacuum cleaner (60; 160) and / or a hand-held power tool (80; 180) as a terminal having a connection for the suction hose (10; 110), wherein the terminal comprises an intensifying fluid source, in particular a compressed air generator and / or an exhaust air source (69) for pressurizing the amplification fluid (3) for the amplification channel structure (14; 114).

Images