EP2683497B1 - High pressure cleaning device - Google Patents

Description

The invention relates to a high-pressure cleaning device, comprising a heatable heat exchanger for heating a deliverable from the high-pressure cleaner fluid, a motor with a drive shaft defining a drive shaft, a pump unit for increasing the fluid pressure, a blower housing exhibiting blower for generating a combustion air flow and a fuel pump for conveying a fuel for the heat exchanger, wherein the pump unit, the blower and the fuel pump are arranged along the drive axis and driven by the drive shaft and wherein the high-pressure cleaning device comprises at least one securing device for securing the fuel pump on the blower housing on its side facing away from the engine.

In such a high-pressure cleaning device, such as in the DE 30 01 571 C2 is described, form the pump unit, the engine, the blower and the fuel pump from a motor pump unit, which is structurally simple and can be made as compact as inexpensive. The drive shaft of the motor drives the pump unit on one side of the motor and the fan on the side opposite the pump unit side of the motor. On the side facing away from the engine of the fan which can also be driven by the drive shaft fuel pump is arranged end to the motor pump unit. This makes it possible to use an inexpensive fuel pump without a through shaft, which is coupled axially to the drive shaft and secured to the blower housing.

Floor cleaning equipment in which a motor pump unit, a fan and a fuel pump are arranged along a drive axis, are also in the EP 0 248 282 A2 and the DE 93 03 648 U1 described.

In a high-pressure cleaning device of the type mentioned, the blower housing is made for example of a plastic molded part, in which a metallic sleeve is cast to secure the fuel pump. A retaining projection of the fuel pump can be positioned in the sleeve and clamped therein by means of screws. This proves to be reliable for the Securing the fuel pump, however, requires a not inconsiderable manufacturing and assembly costs. If the material of the blower housing to be recycled, also falls on additional effort to loosen the sleeve from the blower housing.

Object of the present invention is to develop a generic high-pressure cleaning device so that it can be mounted in a simpler and more cost-effective manner.

This object is achieved in a generic high-pressure cleaner according to the invention that the high-pressure cleaner comprises a first securing device with at least one fuse element and integrally formed on the blower housing, the at least one fuse element associated fuse element receptacle and that the first securing means of a Entsicherungsstellung in which the fuel pump to the drive shaft can be coupled and detachable from this, can be converted into a securing position in which the at least one securing element is arranged in the securing element receiving and the fuel pump secures against loosening of the drive shaft, wherein the first securing means in the securing position by inserting the at least one securing element in the securing element receiving is convertible.

In the high-pressure cleaning device according to the invention, a simple and at the same time cost-effective installation can take place in that the first securing device for securing the fuel pump to the drive shaft can be inserted into the securing element receptacle with the at least one securing element. For example, the at least one securing element can be inserted into the securing element receptacle. This makes it possible to secure the fuel pump with only a small amount of installation work on the blower housing. The first securing device can conveniently be transferred without tools into the securing position in order to facilitate their handling and to the fuel pump without tools on the blower housing to secure. In particular, it is not necessary to screw the fuel pump to the blower housing or a part thereof.

Further, the fuse element receptacle is integrally formed on the blower housing, which is for this purpose, for example, a one-piece plastic molding or comprises, for example, a housing cover. By molding the fuse element receptacle on the blower housing, on the one hand, the manufacturing costs for the motor pump unit can be reduced and a work step as required in the above-described conventional high-pressure cleaning apparatus for pouring the sleeve into the blower housing can be saved. Also, a recycling of the blower housing is facilitated.

If the fuel pump is coupled to the drive shaft and the first securing device assumes the securing position, cooperating stop members on the fuel pump, for example the retaining projection, and on at least one securing element on the one hand and on at least one securing element and on the fuse element receiving the other hand to secure the fuel pump against axial movement interact in a direction away from the blower. In a corresponding manner it can be provided that stop members of the securing element receiving and the at least one securing element on the one hand and the at least one securing element and the fuel pump, such as the holding projection, on the other hand cooperate to secure the fuel pump against axial movement in the direction of the blower. This makes it possible to ensure a particularly well-defined relative positioning of the fuel pump on the motor pump unit when the first securing device assumes the securing position.

It is advantageous if the at least one securing element in the securing position of the serious. Securing device in the axial direction and / or arranged in a direction aligned transversely to the drive axis direction positively or substantially positively in the fuse element receiving is. This allows a reliable seat of the first securing means on the fan housing when it assumes the securing position, and thereby allows a reliable backup of the fuel pump on the blower housing. For the positive or substantially positive fit of the at least one securing element transversely to the drive axis are provided on this and on the securing element receiving transversely to the drive axis effective stop members.

Preferably, the fuel pump comprises at least one securing recess into which the at least one securing element in the securing position of the first securing device engages positively or substantially positively in the axial direction. As a result, the first securing device in the securing position and the fuel pump assume a particularly well-defined relative position to one another in order to reliably secure the fuel pump to the fan housing. The at least one securing recess is, for example, a groove whose walls form stop members for the at least one securing element engaging in the groove in order to prevent an axial movement of the fuel pump.

The first securing device can comprise more than just one securing element, for example two securing elements.

It is advantageous if the first securing device comprises two securing elements which surround the fuel pump in the securing position of the first securing device together in a form-fitting manner or essentially in a form-fitting manner transversely to the drive axis. The two securing elements can receive the fuel pump between them positively or substantially positively. This makes it possible to prevent movement of the fuel pump transversely to the axial direction. As a result, the fuel pump can also be secured transversely to the drive axle in a particularly well-defined relative position with the blower housing.

Preferably, the at least one securing element can be inserted transversely to the drive axle into the securing element receptacle and, in particular, inserted. Transverse to the insertion direction and / or along the drive axis, the at least one securing element, as mentioned above, preferably arranged in a form-fitting manner in the securing element receiving.

It is favorable if the first securing device comprises or forms at least one gripping element for gripping by the user. This facilitates a user's handling of the first securing device.

The high-pressure cleaning device preferably comprises a guide device with at least one guide element for guiding the first securing device when it is being transferred from the releasing position into the securing position. This makes it easier for the user to mount the fuel pump on the blower housing. The first securing device can be applied to the at least one guide element and guided by the latter into the securing position, for example by the at least one securing element being pushed into the securing element receptacle.

Advantageously, the guide device is arranged outside the securing element receptacle. This makes it possible to guide the first securing device already when the at least one securing element is not even arranged in sections in the securing element receptacle.

Preferably, the at least one guide element is integrally formed on the fan housing. This makes it possible to give the motor pump unit a structurally simple design.

For example, the at least one guide element is a guide rib, in particular integrally formed on the fan housing, along which the first securing device is displaceable in order to insert the at least one securing element into the securing element receptacle.

It is advantageous if the high-pressure cleaning device comprises a stop element for limiting the movement of the first securing device when transferring from the releasing position into the securing position. If the first securing device contacts the stop element, the user is signaled that he / she is assuming the securing position. This facilitates the user's assembly of the motor pump unit and allows to ensure the correct positioning of the first securing device relative to the fan housing.

Conveniently, the fan housing comprises the stop element, wherein this is particularly preferably integrally formed on the fan housing. This allows a structurally simple embodiment of the motor pump unit.

It is advantageous if the high-pressure cleaning device comprises a locking device, which secures the first securing device in the locking position counter to a transfer to the armed position in a locking position. This ensures that the fuel pump is not inadvertently released from the drive shaft and thus a reliable function of the motor pump unit is secured.

It is advantageous if the locking device comprises integrally formed locking elements that cooperate with the first securing device and / or the fan housing to lock the securing device. This makes it possible to give the motor pump unit a structurally simple design.

The locking device may in particular be a latching device in an advantageous embodiment of the high-pressure cleaning device. In combination with the last-described embodiment, provision is made in particular for the first securing device to latch into the securing position with the fan housing.

Preferably, the high-pressure cleaning device comprises an actuating device for transferring the locking device from the locking position into an unlocking position in which the first securing device can be transferred from the securing position into the releasing position. The preferably tool-operated actuation device allows the user to handle-friendly manner, to transfer the locking device in the Entarretierungsstellung. This allows the first securing device to be transferred to the unlocking position in order to release the fuel pump from the motor pump unit. The first securing device can preferably be transferred without tools into the unlocking position.

For example, the locking device is transferred to the Entarretierungsstellung by the latching of the first securing means is canceled with the fan housing.

In a structurally simple embodiment of the motor pump unit, it is favorable if the actuating device comprises at least one actuating element integrally formed on the first securing device.

It can be provided that the first securing device is at least partially elastically deformable, for example, the abovementioned locking element is elastically deformable, so that it can be brought out of engagement with the fan housing, for example, using the actuating device.

In particular, in the latter case, it is advantageous if the actuating device comprises at least one limiting element for limiting the movement of the locking device, for example the locking element of the first securing device, when transferring from the locking position to the unlocking position. By the limiting element ensures that the locking device takes no damage when transferred to the locking position.

Preferably, the first securing device is integrally formed, because this allows a structurally simple design and cost-effective production of the motor pump unit. In particular, the at least one securing element, at least one locking element, at least one actuating element and at least one limiting element can be integrally connected to one another.

In an implementation of the high-pressure cleaning device according to the invention in practice, it has proven to be favorable for a structurally simple embodiment, when the first securing device is designed as a securing clip with the at least one securing element forming legs, preferably two each a fuse element forming, spaced apart legs, the connected by a bridge. The securing clip may be formed in one piece and preferably comprises two legs which each form a securing element and in the securing position receive the fuel pump in a form-fitting or substantially positive fit between them. In this case, they engage, for example, in each case a form-fitting or essentially positive fit in a groove-shaped securing receptacle formed on the fuel pump. In extension of the respective legs beyond the bridge, the securing clip can have further, elastically deformable, leg-shaped projections which form locking elements for latching to the fan housing. At the projections forming the locking elements actuators may be arranged in the form of projections, by means of which the locking elements can be deformed to bring the locking clip out of engagement with the fan housing and to release the latching. Projecting delimiting elements of the securing clip can limit the deformation of the locking elements. In addition, integrally formed on the securing clip, a grip element, so that the securing clip is easier to handle for the user.

It is advantageous if the high-pressure cleaning device comprises a second securing device with at least one anti-rotation element, which cooperates with the fuel pump to secure against rotation about the drive axle. In addition to the first securing device, the high-pressure cleaning device may comprise the second securing device. The at least one anti-rotation element exerts a counter torque on the fuel pump, which is opposite to the engine torque, in order to secure it against rotation about the drive axis.

A structurally simple and effective securing of the fuel pump can take place, for example, by the fact that the at least one anti-rotation element rests flat against the fuel pump, so that the largest possible interaction region exists between the anti-rotation element and the fuel pump.

The at least one anti-rotation element is preferably a protrusion of the blower housing that can be applied flatly to a housing of the fuel pump, in order to achieve the above-mentioned advantage in a structurally as simple as possible manner.

It is expedient if the second securing device comprises two projections which can be applied flat on two side walls of the housing oriented transversely to one another. The two anti-rotation elements in the form of projections may, for example, adjoin one another at a common edge. This makes it possible, on the one hand, to reliably secure the fuel pump against rotation about the drive axis and, on the other hand, makes it possible to position the fuel pump and the blower housing relative to one another in a defined manner.

Preferably, the at least one anti-rotation element is integrally formed on the blower housing. This allows a structurally simple embodiment of the motor pump unit. For example, the anti-rotation element is formed on the fan housing rib or an alignment angle with two transversely aligned contact surfaces for the housing of the fuel pump.

It is advantageous if the fan housing includes or forms a contact flange for the fuel pump. As a result, the fuel pump can be brought into a clearly defined relative position to the blower housing. The abutment flange is conveniently aligned perpendicular to the drive axis.

It is advantageous if a central opening is formed on the abutment flange, through which the fuel pump partially engages in the blower housing in the state coupled to the drive shaft and if the section of the fuel pump engaging in the blower housing can be secured to the blower housing with the first securing device engaging the securing position is. The fuel pump, for example, abut with a housing on the abutment flange and partially engage with the above-mentioned holding projection in the fan housing and secured thereto.

In particular, in the last described embodiment, it is advantageous if the securing element receptacle is arranged on a rear side of the abutment flange in the fan housing. For example, the fan housing comprises a housing wall, which forms on the outside the abutment flange and on the inside a stop member, on which the at least one securing element for securing the fuel pump can be supported against axial movement.

Figur 1:

eine Seitenansicht eines erfindungsgemäßen Hochdruckreinigungsgerätes, umfassend eine Haube in leicht geöffneter Stellung;

Figur 2:

eine perspektivische Darstellung einer Motorpumpeneinheit des Hochdruckreinigungsgerätes aus Figur 1, das einen Motor, ein Pumpaggregat, ein Gebläse und eine Brennstoffpumpe aufweist;

Figur 3:

eine perspektivische Teilansicht des Gebläses und der Brennstoffpumpe der Motorpumpeneinheit aus Figur 2 sowie eine erste Sicherungseinrichtung zum Sichern der Brennstoffpumpe am Gebläse in einer Explosionsdarstellung;

Figur 4:

eine perspektivische Darstellung der in Figur 3 dargestellten Sicherungseinrichtung;

Figur 5:

eine Schnittansicht der Brennstoffpumpe im am Gebläse mit der ersten Sicherungseinrichtung gesicherten Zustand;

Figur 6:

eine Schnittansicht längs der Linie 6-6 in Figur 5 und

Figur 7:

eine Schnittansicht längs der Linie 7-7 in Figur 5.

The following description of a preferred embodiment of the invention serves in conjunction with the drawings, the detailed explanation of the invention. Show it:

FIG. 1:

a side view of a high-pressure cleaning device according to the invention, comprising a hood in a slightly open position;

FIG. 2:

a perspective view of a motor pump unit of the high-pressure cleaning device FIG. 1 comprising a motor, a pumping unit, a blower and a fuel pump;

FIG. 3:

a partial perspective view of the blower and the fuel pump of the motor pump unit FIG. 2 and a first securing device for securing the fuel pump to the blower in an exploded view;

FIG. 4:

a perspective view of in FIG. 3 illustrated safety device;

FIG. 5:

a sectional view of the fuel pump in the secured to the fan with the first securing means state;

FIG. 6:

a sectional view taken along the line 6-6 in FIG. 5 and

FIG. 7:

a sectional view taken along the line 7-7 in FIG. 5 ,

FIG. 1 shows a side view of a preferred embodiment of an occupied by the reference numeral 10 high-pressure cleaning device according to the invention. The high-pressure cleaning device 10 comprises a hood 12, which in FIG. 1 is shown in slightly open position and partially releases the view of a fan 14 of the high-pressure cleaner.

The fan 14 is part of an in FIG. 2 in perspective motor pump unit, which includes a motor 18, a pump unit 20, the fan 14 and a fuel pump 22. The motor pump unit 16 is linearly constructed along a drive axis 24, which from an in FIG. 5 Ansatzweise illustrated drive shaft 26 of the motor 18 is defined. The drive shaft 26 serves to drive the pump unit 20, the blower 14 and the fuel pump 22nd

At the end of the motor pump unit 16, the pump unit 20 is arranged to pressurize a dispensable from the high-pressure cleaner 10 liquid. On the pump unit 20 opposite side of the motor 18, the blower 14 is arranged. The blower 14 has an in FIG. 3 Ansatzweise illustrated impeller 28 on. By means of the blower wheel 28, a combustion air flow can be generated, the one in FIG. 1 shown heat exchanger 30 of the high-pressure cleaning device 10 is supplied. The heat exchanger 30 comprises a burner not shown in the drawing, so that in the heat exchanger 30 from the pump unit 20 pressurized cleaning liquid can be heated in order to increase their cleaning effect.

The blower 14 comprises a blower housing 32 with a housing base 34 which is fixed to the motor 18, for example by screwing. On the housing base 34, a housing cover 36 is placed on the side facing away from the motor 18, and in one of the housing interior 38 enclosed by the housing base 34 and the housing cover 36, the impeller 28 mounted on the drive shaft 26 rotatably mounted. The housing base 34 and the housing cover 36 are each made in one piece.

The fuel pump 22 is arranged on the pump unit 20 opposite end side of the motor pump unit 16. The fuel pump 22 serves to supply fuel to the burner in the heat exchanger 30. The fuel is stored in a fuel storage container, not shown in the drawing, of the high-pressure cleaning device 10. About fuel lines also not shown in the drawing, it can be fed to the fuel pump 22 and fed from this to the burner in the heat exchanger 30.

To connect the fuel lines, the fuel pump 22 includes two ports 40 and 42 on a cuboid pump housing 44. From the pump housing 44 is in the axial direction of a cylindrical retaining projection 46, which, will be discussed below, engages in the mounted state of the fuel pump 22 in the housing interior 38 and secured to the blower housing 32. From the retaining projection 46 is axially in the direction of the blower wheel 28, a shaft 48 of the fuel pump 22 from. The shaft 48 is rotatably coupled to the end side of the drive shaft 26 of the motor 18 (Figure 5).

The retaining projection 46 has a securing receptacle 50 at its region adjoining the pump housing 44. The fuse holder 50 is configured as an annular groove 52 which defines a plane oriented perpendicular to the drive axis 24. The annular groove 52 comprises a with respect to the drive axis 24 conically tapered in the direction of the pump housing 44 groove wall 54, which forms a circumferential stop member for securing the fuel pump 22 on the blower housing 32.

To the fuel pump 22 in the in FIG. 2 To secure the desired position shown on the blower housing 32, the high-pressure cleaning device 10, a first securing device 56 and a second securing device 58 on. Of these, the first securing device 56 is provided for securing the fuel pump 22 against detachment from the drive shaft 26 in the axial direction. The second securing device 58 serves as an anti-rotation device for the fuel pump 22 in order to counteract the engine torque and to secure the fuel pump 22 against rotation about the drive axle 24 relative to the blower 14.

In the FIG. 4 The first securing device 56 shown in perspective is designed as a securing clip 60 with two legs 61 and 62 arranged parallel to one another and connected to one another by means of an arcuate bridge 63. The legs 61 and 62 form securing elements 64 and 65 for axially securing the fuel pump 22, which will be discussed later.

In extension of the legs 61 and 62 beyond the bridge 63, the securing clip 60 has leg-shaped projections 66 and 67, respectively. On the opposite side of the other supernatant 66, 67 facing away from the projections 66 and 67 locking projections 68 and 69 are arranged ( FIGS. 4 and 7 ). The projections 66 and 67 with the locking projections 68 and 69 form locking elements 70 and 71 of a locking device 72 for releasably locking the securing clip 60 on the housing cover 36. The projections 66 and 67 can be moved towards each other by elastic deformation of the securing clip 60, wherein the Supernatants 66 and 67 can elastically deform at their approaches to the bridge 63.

In order to facilitate the deformation of the projections 66 and 67, the securing clip 60 has projections 73 and 74, respectively. The projections 73 and 74 are disposed adjacent the locking projections 68 and 69 on the projections 66 and 67 and protrude from the plane defined by the legs 61, 62, the bridge 63 and the projections 66 and 67. The projections 73 and 74 are actuators 75 and 76, respectively, of an actuator 77 for actuating the locking device 72.

If the projections 73 and 74 acted upon forces directed towards each other, the supernatants 66 and 67 are elastically deformed. In order to avoid their damage, the securing clip 60 comprises limiting elements 78 and 79 for limiting the circumference in which the projections 66 and 67 deform. The limiting elements 78 and 79 are configured as wings 80 and 81 projecting from the bridge 63.

The wings 80 and 81 are integrally formed on a web 82 arranged between them, which projects from the bridge 63 and at whose end facing away from the bridge 63, a grip element 83 is integrally formed. The handle member 83 is for handling the securing clip 60 by the user.

Overall, the securing clip 60 is integrally formed.

As in the Figures 3 5 to 7, the one-piece housing cover 36 comprises a tower-shaped attachment portion 84 for attaching the fuel pump 22 to the blower 14. The attachment portion 84 has a cylindrical and coaxial with the drive axis 24 aligned outer wall 86. The outer wall 86 includes a receiving space 88 which forms part of the housing interior 38.

The support portion 90 forms a abutment flange 92 for the pump housing 44 of the fuel pump 22. The support wall 90 has a central opening 94 which is bordered by an edge 96. Through the opening 94, the fuel pump 22 can be partially inserted into the receiving space 88, with the cylindrical retaining projection 46. When the pump housing 44 abuts against the abutment flange 92, the retaining projection 46 plunges into the receiving space 88 just enough so that the shaft 48 coupled to the drive shaft 26.

The already mentioned second securing device 58 comprises two anti-rotation elements 98 and 99, which protrude parallel to the drive axis 24 from the outer wall 86 and from the support wall 90. The anti-rotation elements 98 and 99 are at a rounded edge 100 integrally interconnected ribs 101 and 102, which together form a bracket 103. The bracket 103 protrudes from the plane defined by the abutment flange 92 and is dimensioned so that it can lie flat against two transversely aligned side walls of the pump housing 44 ( FIG. 7 ).

If the shaft 48 of the fuel pump 22 is driven by the drive shaft 26, the bracket 103 forms an anti-rotation, so that the fuel pump 22 does not rotate relative to the blower 14. In addition, the bracket 103 facilitates the alignment of the fuel pump 22 relative to the blower 14 during assembly. If the pump housing 44 on the abutment flange 92 and the bracket 103, the fuel pump 22 takes its desired position on the fan 14 and can be secured by means of the securing clip 60 in the axial direction.

From the edge 96 of the opening 94 are in the receiving space 88 two with respect to the drive axis 24 opposing arcuate inner wall segments 104 and 106 from. Parallel to the drive axis 24, the inner wall segments 104 and 106 are approximately as long as the retaining projection 46 of the fuel pump 22. The inner wall segments 104 and 106 can be considered to project from an inner cylindrical wall coaxial with the drive axis 24 from which two opposing sections have been separated are ( Figures 3 and 7 ).

Radially outside the inner wall segments 104 and 106, the outer wall 86 has recesses 108 and 110, respectively (FIG. Figures 3 and 6 ). In the peripheral region of the inner wall segments 104 and 106, the outer wall 86 therefore does not extend to the support wall 90, which is bounded by the edge 96 in the circumferential direction. The recesses 108 and 110 are parallel to the drive axis 24 slightly shorter than the inner wall segments 104 and 106. At the lateral edges of the recesses 108 and 106, the outer wall 86 and the inner wall segments 104 and 106 are connected to each other by means of four perpendicular to the drive axis 24 paragraphs. Of the four paragraphs are in the drawing in the Figures 3 and 6 only two paragraphs 112 and 114 can be seen. Corresponding shoulders are also provided on the attachment portion 84 adjacent those ends of the inner wall segments 104 and 106 which are opposite those ends of the inner wall segments 104 and 106 where the shoulders 112 and 114 are located.

From the outer wall 86 are rib-shaped projections 116 and 118, axially each as long as the inner wall segments 104 and 106, radially into the receiving space 88 from. The projections 116 and 118 are arranged opposite to each other with respect to the drive axis 24 and arranged approximately between the shoulders 112 and 114 and the paragraphs not shown in the drawing.

Between the receiving space 88 facing the inside of the support wall 90, the paragraphs 112 and 114 and the paragraphs not shown the outer wall 86 and the inner wall segments 104 and 106, a total of a fuse element receptacle 120 for the legs 61 and 62 of the securing clip 60 is formed.

In the region of the recess 108, ribs 122, 123 and 124 project from the outer wall 86. The rib 122 is radially aligned with the drive axis 24, and the ribs 123 and 124 extend on opposite sides of the ribs 122 parallel to which they are aligned. The tops of the ribs 122 to 124 are arranged in the plane defined by the shoulders 112 and 114 and the heels, not shown, and the outer wall 86 in the region of the recess 108.

Of the ribs 123 and 124 extend parallel to the drive axis 24 further ribs 126 and 127, the wall thicknesses are each slightly smaller than those of the ribs 123 and 124. At recesses 128 and 129, the ribs 126 and 127 are interrupted.

The ribs 122, 123 and 124 are guide elements 130, 131 and 132, respectively, which together form a guide device 133 for the securing clip 60.

The ribs 126 and 127 form locking elements 134 and 135 of the locking device 72 and can cooperate with the latching projections 68 and 69 for latching the securing clip 60.

• Zunächst ist die Brennstoffpumpe 22, wie beschrieben, an den Anlageflansch 92 anzulegen, wobei sie mittels des Haltewinkels 103 ausgerichtet werden kann. Der Haltevorsprung 46 greift in den Aufnahmeraum 88 soweit ein, dass die Ringnut 52 mittig zwischen der Stützwand 90 und den Absätzen 112 und 114 sowie den nicht dargestellten Absätzen angeordnet ist, bezogen auf eine Längsrichtung der Antriebsachse 24. Die Welle 48 koppelt mit der Antriebswelle 26.

For example, the fuel pump 22 may be secured by the securing clip 60 as follows:

• First, the fuel pump 22, as described, to be applied to the abutment flange 92, wherein they are aligned by means of the bracket 103 can. The holding projection 46 engages in the receiving space 88 so far that the annular groove 52 is arranged centrally between the support wall 90 and the shoulders 112 and 114 and the paragraphs, not shown, based on a longitudinal direction of the drive shaft 24. The shaft 48 couples with the drive shaft 26th ,

The securing clip 60 assumes a release position in which the fuel pump 22 can be released axially from the drive shaft 26. To transfer to a securing position, the user can take the securing clip 60 on the grip element 83 and place the leg 61 and the projection 66 on the rib 123 and the leg 62 and the projection 67 on the rib 124. In addition, the user may place the web 82 on the middle rib 122. Guided by the ribs 122, 123 and 124 and further by the ribs 126 and 127, the user can insert the securing clip 60 with the legs 61 and 62 without tools in the fuse element receptacle 120 and in particular insert.

The inner wall segment 104 forms a stop element for the bridge 63. If this strikes against the inner wall segment 104, the securing clip 60 assumes a securing position. In the securing position, the leg 61 is arranged in a form-fitting manner parallel to the drive axle 24 in the securing element receptacle 120 between the shoulders 112 and 114 on the one hand and the support wall 90 on the other hand, which respectively form stop members for the leg 61. In a corresponding manner, the leg 62 is arranged in a form-fitting manner between the shoulders, not shown, and the support wall 90.

The legs 61 and 62 jointly surround the cylindrical retaining projection 46, ie they take the retaining projection 46 between them. Both legs 61 and 62 each engage positively in the annular groove 52 and are supported in the direction of the drive shaft 26 on the groove wall 54 from ( FIG. 5 ). Transverse to the direction of the drive axle 24, the retaining projection 46 is thus arranged in a form-fitting manner between the legs 61 and 62.

The legs 61 and 62 sit transversely to the drive shaft 24 further almost without play in the securing element receiving 120 between the outer wall 86 and the projection 116 and the outer wall 86 and the projection 118 on the one hand and the inner wall segments 104 and 106 on the other hand ( FIG. 7 ).

If the securing clip 60 assumes the securing position, the fuel pump 22 is secured against loosening from the drive shaft 26 in the direction away from the blower 14. The groove wall 54 and the legs 61 and 62 form cooperating stop members, and the legs 61 and 62 and the support wall 90 also form cooperating stop members to divert a pointing away from the fan 14 and acting on the fuel pump 22 tensile force to the housing cover 36. The projections 116 and 118 have the purpose that the legs 61 and 62 are not spread at attacking tensile force due to the conical shape of the groove wall 54 transverse to the drive axis 24.

In addition, the locking device 72 assumes a locking position when the securing clip 60 assumes the securing position. In the locking position engage the locking projections 68 and 69 with the ribs 126 and 127 in the region of the recesses 128 and 129 ( FIG. 7 ). This secures the securing clip 60 in the securing position against transferring into the unlocking position and at the same time ensures reliable securing of the fuel pump 22 on the housing cover 36.

If it is necessary to disengage the fuel pump 22 from the blower 14, the procedure may be as follows. The user can bias the projections 73 and 74 toward each other and transfer the locking device 72 from the locking position to an unlocking position. The unlocking position is taken when the locking projections 68 and 69 are disengaged from the ribs 126 and 127, respectively, under the already mentioned deformation of the projections 66 and 67. The wings 80 and 81 ensure in this case, that the supernatants 66 and 67 will not deform excessively, possibly damaging the securing clip 60.

If the locking device 72 assumes the unlocking position, the securing clip 60 can be transferred from the securing position into the releasing position by being displaced transversely to the drive axis 24 along the ribs 122, 123 and 124. This allows the legs 61 and 62 to be removed from the fuse element receptacle 120. As a result, at the same time existing between the legs 61 and 62 and the groove wall 54 is canceled, so that the fuel pump 22 is no longer secured with the securing clip 60 against axial, away from the fan 14 movement.

The decoupling of the fuse of the fuel pump 22 against axial movement with the securing clip 60 on the one hand and against rotation about the drive shaft 24 through the bracket 103 on the other hand allows a structurally simple and cost-effective production of the motor pump unit 16 and thus the high-pressure cleaner 10. It comes to securing the fuel pump 22nd only inexpensive producible plastic moldings are used, which can be structurally simple manufacture. In addition, the fuse of the fuel pump 22 follows with little installation effort by the legs 61 and 62 of the securing clip 60 are inserted into the fuse element receptacle 120. The fuel pump 22 is thereby secured without tools on the housing 36 and can be mounted with only two handles on the housing cover 36, namely application to the abutment flange 92 in the correct orientation relative to the bracket 103 and tool-free transfer of the securing clip 60 in the securing position by inserting and especially inserting the legs 61 and 62 in the fuse element receptacle 120th

Claims (17)

1. A high-pressure cleaning appliance, comprising a heatable heat exchanger (30) for heating a fluid to be dispensed by the high-pressure cleaning appliance (10), a motor (18) having a drive shaft (26) that defines a drive axis (24), a pump unit (20) for increasing the fluid pressure, a fan (14) for generating a combustion air stream and having a fan housing (32), and a fuel pump (22) for delivering a fuel for the heat exchanger (30), the pump unit (20), the fan (14) and the fuel pump (22) being located along the drive axis (24) and being drivable by the drive shaft (26), and the high-pressure cleaning appliance (10) comprising at least one securing device (56, 58) for securing the fuel pump (22) on the fan housing (32) on its side facing away from the motor (18), characterized in that the high-pressure cleaning appliance (10) comprises a first securing device (56) having at least one securing element (64, 65) and a securing element receptacle (120) integrally formed on the fan housing (32) and associated with the at least one securing element (64, 65), and that the first securing device (56) can be transferred from an unsecured position, in which the fuel pump (22) can be coupled to the drive shaft (26) and released from it, to a secured position in which the at least one securing element (64, 65) is located in the securing element receptacle (120) and secures the fuel pump (22) to prevent it from being released from the drive shaft (26), and the first securing device (56) can be moved to the secured position by inserting the at least one securing element (64, 65) into the securing element receptacle (120).
2. The high-pressure cleaning appliance in accordance with Claim 1, characterized in that the at least one securing element (64, 65) is located in a positively-locking or substantially positively-locking manner in the securing element receptacle (120) in the secured position of the first securing device (56) in the axial direction and/or in a direction oriented transversely with respect to the drive axis (24).
3. The high-pressure cleaning appliance in accordance with Claim 1 or 2, characterized in that the fuel pump (22) comprises at least one securing recess (50) with which the at least one securing element (64, 65) engages in a positively-locking or substantially positively-locking manner in the axial direction in the secured position of the first securing device (56).
4. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the first securing device (56) comprises two securing elements (64, 65) which engage around the fuel pump (22) in a positively-locking or substantially positively-locking manner transverse to the drive axis (24) in the secured position of the first securing device (56).
5. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the at least one securing element (64, 65) can be inserted into the securing element receptacle (120) transversely with respect to the drive axis (24).
6. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the first securing device (56) comprises or forms at least one handle element (83) for gripping by the user.
7. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the high-pressure cleaning appliance (10) comprises a guide device (133) having at least one guide element (130, 131, 132) for guiding the first securing device (56) when it is transferred from the unsecured position into the secured position.
8. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the high-pressure cleaning appliance (10) comprises a locking device (72) which, in a locked position, secures the first securing device (56) in the secured position to prevent it from being moved to the unsecured position.
9. The high-pressure cleaning appliance in accordance with Claim 8, characterized in that the high-pressure cleaning appliance (10) comprises an actuating device (77) for transferring the locking device (72) from the locked position into an unlocked position in which the first securing device (56) can be transferred from the secured position to the unsecured position.
10. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the first securing device (56) is formed in one piece.
11. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the first securing device (56) is configured as a securing clip (60) having one leg (61, 62) which forms the at least one securing element (64, 65), preferably having two legs (61, 62) at a distance apart from one another, each forming a securing element (64, 65) and connected to one another via a bridge (63).
12. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the high-pressure cleaning appliance (10) comprises a second securing device (58) having at least one antitwist element (98, 99) which cooperates with the fuel pump (22) to secure same against rotation about the drive axis (24).
13. The high-pressure cleaning appliance in accordance with Claim 12, characterized in that the at least one antitwist element (98, 99) is a protrusion (101, 102) on the fan housing (32) that can be placed in face-to-face contact with a housing (44) of the fuel pump (22).
14. The high-pressure cleaning appliance in accordance with Claim 12 or 13, characterized in that the at least one antitwist element (98, 99) is integrally formed on the fan housing (32).
15. The high-pressure cleaning appliance in accordance with any one of the preceding claims, characterized in that the fan housing (32) comprises or forms a contact flange (92) for the fuel pump (22).
16. The high-pressure cleaning appliance in accordance with Claim 15, characterized in that a central opening (94) is formed on the contact flange (92) through which the fuel pump (22) engages partially in the fan housing (32) in the state in which it is coupled to the drive shaft (26), and in that the portion (46) of the fuel pump (22) engaging in the fan housing (32) can be secured on the fan housing (32) by the first securing device (56) taking up the secured position.
17. The high-pressure cleaning appliance in accordance with Claim 15 or 16, characterized in that the securing element receptacle (120) is located on a rear side of the contact flange (92) in the fan housing (32).

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