EP2027939B1 - High pressure cleaning device - Google Patents

Description

State of the art

The invention is based on a high-pressure cleaning device according to the preamble of claim 1.

There are already known high-pressure cleaning devices with a hose which is removed after use by an operator of the high-pressure cleaning device.

Advantages of the invention

The invention is based on a high-pressure cleaning device with a high-pressure cleaning device. The WO 2004/069436 A discloses a high-pressure cleaner with a hose winding unit, which is partially automated. A hose and a cable are arranged on a common drum. There is a handle provided, but no housing.

The DE 298 09 473 U1 discloses a high-pressure cleaner in which a hose and a cable are arranged on open drums. An at least partially automated high-pressure hose winding unit is not disclosed.

The DE 20 2006 007 167 U1 . DE 299 14 193 U1 such as FR-A-2 793 710 disclose high-pressure cleaning devices, in each case a hose is arranged on a drum. However, a cable winding unit is not disclosed.

The DE 4119 907 A1 discloses a high pressure cleaning apparatus having a shell forming a housing in which a non-automated hose winding unit and cable winding unit are disposed.

The invention has for its object to improve the above-mentioned high-pressure cleaner. This is achieved by the characterizing features of claim 1.

It is proposed that the high-pressure cleaning device has a hose winding unit, in particular a high-pressure hose winding unit, which is designed to be at least partially automated. In this case, "automated" should in particular be understood to mean that the hose winding unit carries out at least one process at least partially automatically, such as an unwinding process and / or at least advantageously a winding process. This can be a cumbersome folding, a risk of looping, a risk of kinking, a stumbling hazard and in particular a separation of a hose to be avoided by a high-pressure cleaner. A "high-pressure cleaning device is to be understood, in particular, as an electrically operated, portable working device which, with the aid of water pressure, in particular from 15 bar, and optionally with the use of additional cleaning agents to remove soiling is used. The high-pressure cleaning device preferably weighs less than 25 kg and particularly advantageously less than 20 kg. In this context, a "high-pressure hose winding unit" should be understood to mean, in particular, a winding unit which is specifically intended for opening and / or unwinding high-pressure hoses, wherein a "high-pressure hose" is to be understood as meaning, in particular, a hose which is at least 15 bar and preferably is designed to be at least 60 bar and more preferably at least 140 bar pressure.

Preferably, the hose winding unit has at least one actuator which is provided for winding and / or unwinding or is intended to provide a positioning force for an up and / or unwinding operation. The actuator can be formed by various actuators that appear reasonable to those skilled in the art, such as by an electric motor or particularly advantageous by an actuator with a spring drive, whereby this can be designed in a particularly simple, lightweight, space-saving and cost-effective manner, in particular if the spring drive comprises a scroll spring, preferably at least partially formed by a spring steel strip. It should be understood in particular a spring which is at least partially rolled up under a "roll spring". By means of an actuator formed by an electric motor, advantageously both an automated unwinding process and an automated reeling process could be made possible. In particular, the electric motor could also be used as a brake unit.

If the scroll spring has a number of turns of at least five, and preferably of at least eight, in at least one operating mode, a uniform power development can advantageously be achieved.

It is also proposed that the hose winding unit has a bearing axis with at least one supply channel, whereby this space can be integrated to save space and additional components can be saved.

An advantageous distribution of an inflowing medium, in particular of water, can be achieved if the hose winding unit has a circulation distributor extending radially outward from the bearing axis.

It is also proposed that the hose winding unit has at least one web extending at least substantially parallel to a winding axis, as a result of which high stability can be achieved. In this context, "essentially parallel" should be understood in particular to mean that the web has a main extension direction which deviates less than 10% relative to its main extension from a parallel axis of the winding about which a drum of the hose winding unit is rotatably mounted.

In a further embodiment of the invention, it is proposed that the device has a cable winding unit and in particular an at least partially automated cable winding unit, wherein a "cable winding unit" is to be understood in particular a winding unit, which is specifically intended for winding and / or unwinding a power cable. By a suitable combination of a hose winding unit and a cable winding unit a particularly short-term work readiness can be achieved, in particular if the hose winding unit and the cable winding unit have separately formed drums on which a hose or a cable up and / or can be unwound. It can be achieved in each case a quick and convenient return to a depot, with a return button, by means of which a return operation can be triggered. The hose and / or the cable can advantageously be stored protected in a device housing.

Alternatively and / or in addition to a return button, a reversing mechanism is particularly advantageous, by means of which locking can be achieved, in particular by accelerated return, and with a slowed-down retraction, a locking can be avoided and a complete reeling can be achieved.

If the hose winding unit and / or the cable winding unit has a braking device, an operation controlled by an operator, in particular winding and / or unwinding, can advantageously be achieved, in particular if the braking device is intended to brake a rotatably mounted drum and / or block, so that the hose and / or the cable can preferably be pulled out to various desired lengths and upon reaching the respective desired length by means of the braking device, the drum can be blocked, so that further unwinding and in particular a rolling is avoided.

Advantageously, the cable winding unit is provided in the direction of a winding axis for single-layer winding, in particular by the same having a cable receiving area which is smaller than a double cable diameter of a cable provided for the cable winding unit. By a corresponding configuration, a particularly advantageous winding and unwinding can be achieved structurally simple with few components and in particular a particularly advantageous heat dissipation can be ensured. Furthermore, a required cooling by means of a motor fan can be avoided. In principle, however, a single-layer winding or multilayer windings considered in the radial direction relative to a winding axis is also conceivable.

In a further embodiment of the invention, it is proposed that the cable winding unit has at least one sliding contact for electrical contacting, as a result of which an advantageous electrical contacting can be achieved easily.

If the cable winding unit and the hose winding unit are arranged in at least partially separate housing units, undesired interactions between the hose winding unit and the cable winding unit can be avoided. It should be understood in particular "separated" that storage spaces for the hose winding unit and the cable winding unit are at least partially and preferably largely separated by a partition.

Particularly advantageously, a partition wall is molded onto a frame of the hose winding unit, which can then be sealed by means of a sealant, such as preferably by means of a sealing ring or a sealing tape against a housing, so that a water passage to the cable winding unit can be avoided in a defective hose.

If the device has a power connection and a hose connection, in particular a high-pressure hose connection, which are arranged in opposite housing end regions, cable and hose lengths can be used particularly advantageously. In this case, an "end region" should be understood to mean in particular a region which is smaller than 10% of a total length in a longitudinal direction and / or in a transverse direction of the housing starting from one end in the longitudinal direction and / or in the transverse direction or an outer edge of the housing Longitudinal direction or a total width or total height in the transverse direction.

If the power connection for an electrical connection and the hose connection are arranged on opposite sides of the housing, in particular device housing sides, a particularly high level of safety, in particular with respect to electrical shock, can be achieved, in particular if a water supply connection and a high-pressure connection on a common housing side and the power connection are arranged on an opposite side of the housing.

The high-pressure cleaning device has a device housing, in which in particular a drive unit, such as an electric motor, and / or a compressor unit is arranged. The high-pressure cleaning device advantageously has a device housing that is at least partially separated from the device housing. As a result, a particularly flexible design can be achieved and unwanted interactions between elements arranged in the device housing and elements arranged in the device housing can be avoided.

The device housing can form its own transport unit next to the device housing, however, is advantageously at least in an operating mode firmly connected to the device housing and thus forms with this for an operator a common transport unit. For this purpose, the device housing may preferably be arranged at least partially in the device housing. The device housing may be connected to the device housing for a permanent fixed connection, i. by a permanent connection and / or by a connection intended to be released exclusively by a service person. Alternatively, however, the device housing may also be connected to a connection to the device housing intended to be released by an operator, such as a latching connection, etc.

drawing

Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

Fig. 1

a section through a device according to the invention,

Fig. 2

a perspective view of an automatic cable winding unit of the device with respect to a brake plate and an electrical connection side,

Fig. 3

a schematic section through the cable winding unit,

Fig. 4

a perspective view of the cable winding unit overlooking a cable drum side,

Fig. 5

a schematic section through a hose winding unit of the device,

Fig. 6

a perspective view of the hose winding unit overlooking a roll spring side,

Fig. 7

a perspective view of the hose winding unit facing a brake plate.

Description of the embodiment

FIG. 1 shows a section through a device according to the invention with a high-pressure hose 9 'comprising a hose assembly and an automated high-pressure hose winding unit 1' and with a power cable 9 and an automated cable winding unit 1. The high-pressure hose winding unit 1 'and the cable winding unit 1 are arranged functionally separated working in a common device housing, which is formed of two housing units 2, 2 ', which are spatially divided by a partition wall 2a, to safely prevent water from the high-pressure hose winding unit 1' to the cable winding unit 1, especially in the event of damage. The partition wall 2 a is molded onto the housing unit 2. Alternatively, however, a partition wall 2a 'could be particularly advantageously also formed on a frame and / or on a flange 17' of the high-pressure hose winding unit 1 ', as shown in FIG FIG. 1 schematically indicated, whereby a simplified construction can be achieved. In this case, the partition wall 2a 'is advantageously sealed off from the housing unit 2' by means of a sealing tape 2a ".

The housing units 2, 2 'each have a common lower part and a common upper part. The housing units 2, 2 'are arranged in a device housing 30 of a high-pressure cleaning device and are fixedly connected thereto by means of a connection unit 20. The connection unit 20 is formed by a detachable latching connection, but could also be formed by other, the skilled person appears to be useful form-fitting, cohesive and / or non-positive connections.

The cable winding unit 1 has a spring drive comprehensive actuator with a scroll spring 4 made of a spring steel strip, which is integrated in a braking device with a fixed brake plate 3 of the cable winding unit 1.

The cable winding unit 1 has a rotatably mounted cable drum 5, which is provided for single-layer winding of the power cable 9, by having a receiving area whose width 5a is smaller than a double net cable diameter.

Via sliding contacts 7 of the cable winding unit 1, an electrical connection is made from a power connection or a mains cable connection 8 of the rotatable cable drum 5 to an electric drive of the high-pressure cleaning device ( FIGS. 1 . 2 and 3 ). The drive or motor, not shown, has the task of driving a piston pump of the high-pressure cleaning device to generate an operating pressure. As drive motors come here depending on the embodiment both universal motors with reduction gear and asynchronous motors in the order of 2000 W recording power in question.

In the illustrated embodiment, an integrally formed with the brake plate 3 or molded on a Bremsplattenstirnseite axis 6 assumes the storage of the two-part cable drum 5 and der Kabeltrommelgehäuses. With regard to the configuration of the cable drum 5, basically two embodiments can be considered. As shown in the present example, the power cable 9 is considered single layered in the direction of a winding axis 56, i. in vertically successive turns on each other or rolled up. This embodiment is preferred when a particularly narrow design of the cable drum 5 appears necessary due to limited space.

A second embodiment is to roll up the power cord 9, preferably in a longitudinal direction of a drum axis known from hose reels for rolling up garden hoses. In order to reliably avoid jamming of the high-pressure hose and blocking the cable drum in a corresponding embodiment, can be advantageous before the Drum attached oscillator may be provided, which performs a reciprocating motion, for example by means of a threaded rod according to the pitch of the net cable 9 to be rolled up and thus guarantees a uniform winding, but in principle the single-layer design, especially for cost reasons, is preferred.

In a further embodiment, not shown, it may also be appropriate to combine a single-layer cable winder with a likewise einlagig designed Schlauchaufwickelausführung. This will be the case when narrow but high designs are required for the high pressure washer and the hose length can be restricted.

In a further embodiment, not shown, the winding devices can be performed both for power cord and for the high-pressure hose in a preferred extension of the drums, especially if both times large lengths are to be provided or if there is a demand to build extremely flat but wide.

Fig. 1 . 5 . 6 and 7 show schematic sections and partial views of the high-pressure hose winding unit 1 '. The high-pressure hose winding unit 1 'is arranged in the housing unit 2', has as a basic function an automatic retraction of the high-pressure hose 9 'and is essentially constructed in accordance with the cable winding unit 1.

Analogous to the cable winding unit 1, the high-pressure hose winding unit 1 'on the front side a braking device with a brake plate 3' and with the individual parts of a braking device, which are designed according to construction and function of the braking device for the power cord 9. Furthermore, the high-pressure hose winding unit 1 'comprises an actuator comprising a spring drive with a spring 4' made of a spring steel strip which is arranged on a side of a hose drum housing 5.1 ', 5.2' opposite the brake plate 3 '. The scroll spring 4 'has a number of turns of about ten.

Before starting work with the high-pressure cleaner, both the power cord 9 and the high-pressure hose 9 'from a respective depot by hand in the length required for the work is pulled out. For locking in the required length provides a working together with the braking device stop mechanism.

By operating a located on a device housing outside, not shown release lever, the power cord 9 and the high-pressure hose 9 'can be completely or automatically retracted to any length.

On one of the brake plate 3 'opposite end face is the flange 17 which enters into a fixed connection with the brake plate 3' by halves each arranged with their main directions of extension parallel to the winding axis 56 extending webs 15 and 16. The webs 15, 16 are used to stabilize the system and also provide protection against injury during repairs in the event of a jump of the high-tensioned scroll spring 4 '.

Two interconnected bearing shafts 10 and 11 make an inner connection between the brake plate 3 'and flange 17 forth, wherein the bearing shaft 10 rotatably connected to the flange 17 and the bearing shaft 11 rotatably connected to the brake plate 3'.

On the bearing axis 10, the inner end of the scroll spring 4 'permanently attached. Furthermore, the bearing shaft 10 forms a bearing 6.1 'for a first hose reel housing part 5.1' of the two-part hose reel housing 5.1 ', 5.2'. The bearing shaft 11 forms a second bearing 6.2 'for a second hose drum housing part 5.2' of the hose drum housing 5.1 ', 5.2'. The bearing axis 11 has a feed channel 12 and has the task of producing a high-pressure connection to the high-pressure hose 9 'via a pump-side high-pressure hose connection 7' and via the feed channel 12. This is done via a with the hose reel housing 5.1 ', 5.2' rotating circulation distributor 13, starting from the bearing axis 11 radially to extends outside. Two corresponding with the bearing shaft 11 sealing rings 14 ensure the tightness of the system. The high-pressure hose connection 7 'and the power cable connection 8 are arranged in opposite housing end regions of the device housing.

A hose reel connection 8 'on the circumference of the hose reel housing 5.1', 5.2 'is used to establish a connection to the high-pressure hose 9'. The hose reel housing 5.1 ', 5.2' serves to receive the high-pressure hose 9 'and is dimensioned such that the high-pressure hose 9' can be sufficiently accommodated or stowed in its full length in terms of volume.

The scroll spring 4 ', which is arranged in a roller spring housing 4.1', is permanently attached with its outer end to a housing wall of the first hose drum housing part 5.1 '. Because of the demand for as equal a force as possible over the entire travel, the scroll spring 4 'has a flat characteristic and a plurality of turns. It is then most biased when the high pressure hose 9 'is pulled out to the maximum. The scroll spring 4 'has the task of completely and uniformly recapturing the high-pressure hose 9' in its fully extended length with as constant a force as possible and partly with the aid of a braking device. Your spring force must be dimensioned in the design so that it is able to counteract the elastic deformations of the high-pressure hose 9 'during the winding process and any frictional resistances occurring. Furthermore, it should be noted in the design of the scroll spring 4 'that winding forces must be overcome by an operator.

Claims (16)

1. High-pressure cleaning device having a high-pressure cleaning apparatus with a hose winding unit (1') which is in the form of a high-pressure hose winding unit and is at least partially automated, and having a cable winding unit (1), characterized in that the cable winding unit (1) and the hose winding unit (1') are arranged in at least partially separated housing units (2, 2') which are physically divided by a partition wall (2a) in order to reliably prevent water passing from the high-pressure hose winding unit to the cable winding unit (1).
2. High-pressure cleaning device according to Claim 1, characterized in that the high-pressure hose winding unit and the cable winding unit (1) are arranged so as to operate in a functionally separate manner and in a common apparatus housing which is formed from the two housing units (2, 2').
3. High-pressure cleaning device according to Claim 1 or 2, characterized in that the partition wall (2a) is injection-moulded onto the housing unit (2) or integrally formed on a frame and/or on a flange (17') of the high-pressure hose winding unit.
4. High-pressure cleaning device according to one of the preceding claims, characterized in that the partition wall (2a') is sealed off from the housing unit (2') by means of a sealing strip (2a ").
5. High-pressure cleaning device according to one of the preceding claims, characterized in that the housing units (2, 2') each have a common lower part and a common upper part.
6. High-pressure cleaning device according to one of the preceding claims, characterized in that the housing units (2, 2') are arranged in a device housing (30) of a high-pressure cleaning device and are firmly connected to the said device housing by means of a connection unit (20), with the connection unit (20) preferably being formed by a releasable latching connection.
7. High-pressure cleaning device according to one of the preceding claims, characterized in that the hose winding unit (1') is in the form of a high-pressure hose winding unit.
8. High-pressure cleaning device according to one of the preceding claims, characterized in that the hose winding unit (1') has an actuator which preferably has a spring drive.
9. High-pressure cleaning device according to Claim 8, characterized in that the spring drive has a scroll spring (4') which is formed, in particular at least partially, by a spring steel strip, and preferably has at least five turns, in particular at least eight turns, in at least one operating mode.
10. High-pressure cleaning device according to one of the preceding claims, characterized in that the hose winding unit (1') has a bearing shaft (11) with at least one feed channel (12), and preferably a manifold (13) which extends radially towards the outside starting from the bearing shaft (11).
11. High-pressure cleaning device according to one of the preceding claims, characterized in that the hose winding unit (1') comprises a braking device.
12. High-pressure cleaning device according to one of the preceding claims, characterized in that the hose winding unit (1') has at least one crosspiece (15, 16) which runs at least substantially parallel to a winding axis (56).
13. High-pressure cleaning device according to one of the preceding claims, characterized in that the cable winding unit (1) is at least partially automated.
14. High-pressure cleaning device according to one of the preceding claims, characterized in that the cable winding unit (1) is intended for single-layer winding, as viewed in the direction of a winding axis (56).
15. High-pressure cleaning device according to one of the preceding claims, characterized in that the cable winding unit (1) has at least one sliding contact (7) for making electrical contact.
16. High-pressure cleaning device according to one of the preceding claims, characterized by a power connection (8) and a hose connection (7') which are arranged in opposite housing end regions.

Images