High-pressure cleaning device

Abstract

The invention relates to a high-pressure cleaning device (10), comprising: a motor pump unit (54) having a pump (60) and an electric motor (58) for driving the pump; and an electrical control device (74), which is arranged above the motor pump unit (54) at a distance therefrom and is connected to the electric motor (58) via at least one electrical cable (92). In order to improve the high-pressure cleaning device (10) in such a way that the mechanical and thermal stresses to which the at least one cable (92) is subjected in the region between the electric motor (58) and the control device (74) can be reduced in a simple design and easy installation manner, it is proposed that the high-pressure cleaning device (10) is provided, according to the invention, the at least one cable (92) is surrounded in the region between the electric motor (58) and the control device (74) by an elastically deformable protective hose having a first end section (106) associated with the electric motor (58) and a second end section (108) associated with the control device (74), the two end sections (106, 108) are each connected in a pluggable manner to a hose coupling section (110, 138) of an electric motor (58) or a control device (74), at least one cable (92) being guided through the protective hose and the two hose coupling sections (110, 138).

Description

Technical Field

[0001] The present invention relates to a high-pressure cleaning device having: a motor-pump unit having a pump for pressurizing a cleaning liquid and an electric motor for driving the pump; and an electrical control device for controlling the electric motor, wherein the control device is arranged spaced apart from the motor-pump unit above the motor-pump unit and is connected to the motor via at least one electrical cable. Background Art

[0002] With such a high-pressure cleaning device, a cleaning liquid, preferably water, can be pressurized and then directed at an object to be cleaned.

[0003] The cleaning liquid is pressurized by a pump which is driven by an electric motor. The electric motor is controlled by a control device by means of which the electric motor can be switched on and off. In particular, it can be provided that the operating type of the electric motor can also be selected using the control device. The control device is connected to the motor via at least one electrical cable and is arranged spaced apart from the motor-pump unit above the motor-pump unit. Providing a distance between the motor and the control device enables the control device to be kept at a low thermal load due to the waste heat of the motor. Such a high-pressure cleaning device is known, for example, from WO 2012 / 119640 A2.

[0004] At least one electrical cable connecting the electric motor to the control device is subjected to thermal and mechanical loads in the region between the electric motor and the control device. It is desirable to reduce this load. Summary of the Invention

[0005] Accordingly, the object of the present invention is to improve a high-pressure cleaning device of the type initially described such that the mechanical and thermal loads on at least one cable in the region between the electric motor and the control device can be reduced in a simple and easily installable design structure.

[0006] According to the invention, this object is achieved in a high-pressure cleaning device of the generic type in such a way that in the region between the electric motor and the control device, at least one cable is surrounded by an elastically deformable protective hose which has a first end section assigned to the electric motor and a second end section assigned to the control device, wherein the first end section can be plugged into a first hose connection part arranged on the electric motor, and wherein the second end section can be plugged into a second hose connection part arranged on the control device, and wherein at least one cable can be guided through the protective hose and the two hose connection parts.

[0007] In a high-pressure cleaning device according to the invention, at least one electric cable electrically connecting the control device to the electric motor is surrounded by a protective hose at least in the region of the electric motor and the control device. Thereby, the mechanical load and the thermal load acting on at least one cable can be reduced. In addition, at least one cable can be protected from splashing water by means of the protective hose. The protective hose is designed to be elastically deformable and has a first end section assigned to the electric motor and a second end section assigned to the control device. The first end section can be plugged into a first hose connection part arranged on the electric motor, and the second end section can be plugged into a second hose connection part arranged on the control device. At least one cable can be guided through the protective hose and these two hose connection parts. The pluggable connectability of the end sections of the protective hose to the hose connection parts arranged on the electric motor and the control device enables a very simple installation of the protective hose, wherein the end sections do not need to be designed in a special way, for example, not in the form of a connecting flange or a connecting bush, on the contrary, the protective hose can be cut from a hose stock in an appropriate length and plugged into the hose connection parts without additional reprocessing. The elastic deformability of the protective hose enables the protective hose to be deformed while maintaining the inner diameter of the protective hose to such an extent that the protective hose can be inserted into or plugged onto the hose connection parts even when the hose connection parts are not precisely aligned with each other. Thus, the mechanical stress and the thermal stress acting on at least one cable in the region between the electric motor and the control device can be reduced in a simple and easy-to-install design structure. In addition, in the region between the electric motor and the control device, at least one cable can be protected from splashing water by means of the protective hose.

[0008] In a preferred embodiment of the invention, the protective hose is designed as a corrugated hose. This corrugated hose can achieve a shape-stable change in direction of the protective hose in the region between the electric motor and the control device in a particularly simple manner.

[0009] For example, the corrugated hose can be made of a plastic material, in particular a polyethylene or polypropylene material.

[0010] Alternatively, it can be provided that the protective hose is constructed as a metal corrugated hose. By means of the metal corrugated hose, not only can the mechanical load and the thermal load acting on at least one cable in the region between the electric motor and the control device be reduced, but also at least one cable can be protected from electromagnetic interference, such as overvoltage.

[0011] In a particularly preferred design of the present invention, the longitudinal axis of the hose connection part has direction components that are parallel to each other, and stop elements are respectively arranged at the hose connection part, against which the end sides of the protective hose can abut, wherein the protective hose can be clamped between the two stop elements. For example, it can be provided that the first hose connection part is oriented vertically in the horizontal use position of the high-pressure cleaning device, while the second hose connection part is inclined relative to the vertical line, wherein the inclination angle is less than 90º, for example, at most 45º. The direction components of the longitudinal axes of the two hose connection parts that are parallel to each other enable the elastically deformable protective hose to be clamped between the two stop elements, wherein the protective hose is compressed in the longitudinal direction and can be fixed to the hose connection part in a particularly simple manner due to its inherent stress.

[0012] Advantageously, the protective hose can be locked with the first hose connection part and / or the second hose connection part. This enables a further simplification of the installation of the protective hose.

[0013] In a design of the protective hose in the form of a corrugated hose, it is advantageous that the first hose connection part and / or the second hose connection part has at least one locking projection that is adapted to the corrugated shape of the protective hose. This facilitates the locking of the protective hose with the hose connection part.

[0014] Advantageously, at least one of the two hose connection parts is surrounded by at least one hose guiding part that is arranged at a distance from the hose connection part in a partial area of its periphery, and on the outer side of this hose connection part, in the area of its periphery that is not surrounded by the hose guiding part, it has at least one locking projection, wherein the protective hose can be inserted onto this hose connection part and can be locked with this hose connection part by means of at least one locking projection. This design facilitates the installation of the protective hose on the hose connection part and enables a mechanically highly loadable plug connection between the protective hose and the hose connection part, because the end section of the protective hose assigned to the hose connection part can be inserted onto the hose connection part and locked with it, wherein at least one hose guiding part can guide the end section when it is inserted onto the hose connection part and can abut against the outer side of the end section in the locked state of the end section, so that at least one hose guiding part can support the end section on the outer side. In addition, this design also enables the hose connection part and the hose guiding part to be simply manufactured by a casting method, because the hose connection part can be demolded in the axial direction in the area surrounded by at least one hose guiding part and demolded in the radial direction in the area of at least one locking projection.

[0015] Preferably, at least one of the two hose connection parts is designed as a sleeve type.

[0016] In an advantageous design of the present invention, the high-pressure cleaning device has a hose connection device which forms the first hose connection part and can be detachably connected to the motor housing of the electric motor with a sealing element arranged in between. For example, it can be provided that the hose connection device can be screwed to the motor housing. The provision of the hose connection device which forms the first hose connection part enables the use of a standard motor without having to specially design its motor housing in order to establish a pluggable connection with the protective hose. As is common, the motor housing of a standard motor has a through-opening through which at least one cable can be guided. The hose connection device which forms the first hose connection part can be connected to the through-opening with a sealing element (such as a sealing ring) arranged in between, and then the protective hose can be inserted onto or into the first hose connection part.

[0017] Advantageously, the control device has a controller housing for accommodating at least one control element, wherein the second hose connection part is formed on the controller housing.

[0018] In particular, it can be provided that the controller housing has a lower housing part and an upper housing part, wherein the second hose connection part is formed on the bottom wall of the lower housing part. Description of the Drawings

[0019] The following description of the preferred embodiments of the present invention is used for further explanation in conjunction with the drawings. Among them:

[0020] Figure 1 : shows a perspective view of the high-pressure cleaning device;

[0021] Figure 2 : shows Figure 1 a top view of the high-pressure cleaning device;

[0022] Figure 3 : shows a partial cross-sectional view of the high-pressure cleaning device along the line 3-3 in Figure 2 ;

[0023] Figure 4 : shows Figure 3 an enlarged view of the detail X;

[0024] Figure 5 : shows a cross-sectional view of the high-pressure cleaning device along the line 5-5 in Figure 4 with the electrical cable hidden;

[0025] Figure 6 : shows a perspective view of the hose connection device of the high-pressure cleaning device. Detailed implementation manners

[0026] In the drawings, advantageous implementation manners of a high-pressure cleaning device according to the present invention are schematically shown, and the high-pressure cleaning device as a whole bears the reference numeral 10. In the shown implementation manner, the high-pressure cleaning device 10 is designed to be movable and has a continuous heater 12 operated by fuel. However, the present invention is not limited to such a high-pressure cleaning device, but also includes high-pressure cleaning devices that do not have a continuous heater operated by fuel and are not necessarily movable.

[0027] In the shown implementation manner, the high-pressure cleaning device 10 has two traveling wheels 14, 16 and a steering roller 18, which are rotatably supported on a chassis 20. The main movement direction of the high-pressure cleaning device 10 is shown by an arrow 22 in Figure 1 , Figure 2 and Figure 3 .

[0028] The chassis 20 is formed by a bottom plate 24, which is screwed to a load-bearing frame 26. The load-bearing frame 26 forms a front frame section 28 with respect to the main movement direction 22. The front frame section is designed to be U-shaped and is oriented substantially vertically with respect to the horizontal use position of the high-pressure cleaning device 10 shown in the drawings.

[0029] Connected to the front frame section 28 are two longitudinal side frame sections 30, 32 that are spaced apart from each other and oriented parallel to the main movement direction 22. These longitudinal side frame sections are rigidly connected to the side edges 38 or 40 of a U-shaped rear side frame section 42 via connecting sections 34, 36 respectively. The side edges 38, 40 are oriented substantially vertically and are rigidly connected to each other via a beam 44 oriented perpendicular to the main movement direction 22.

[0030] Against the main movement direction 22, a grip bow 46 is connected to the rear side frame section 42. The grip bow has two bow side edges 48, 50, which are screwed to the rear side frame section 22 and are rigidly connected to each other via a bow beam 52.

[0031] The continuous heater 12 is arranged between the bow side edges 48, 50 of the grip bow 46 behind the rear side frame section 42 with respect to the main movement direction 22. This is clearly seen especially from Figure 3 .

[0032] In front of the rear side frame section 42 in the main movement direction 22, a motor-pump unit 54 is positioned on a bracket 56. The motor-pump unit 54 has an electric motor 58 that drives a pump 60 and a blower 62. The cleaning liquid, preferably water, can be pressurized by the pump 60, and combustion air can be supplied to the continuous heater 12 by means of the blower 62.

[0033] A fuel tank 64 is arranged between the motor pump unit 54 and the front frame section 28. The fuel tank 64 is used to store liquid fuel, especially heating oil or diesel fuel, for operating the continuous heater 12.

[0034] The fuel tank 64 can be installed in the intermediate space between the motor pump unit 54 and the front frame section 28 in an installation direction oriented perpendicular to the main movement direction 22, and can be removed from the intermediate space, for example, for maintenance purposes.

[0035] A holding part 68 extends between two side edges 38, 40 of the rear frame section 42, and the holding part is connected to the side edges 38, 40 in a material-locking manner. A plate-shaped support part 70 extends from the holding part 68 up to the upper side 72 of the fuel tank 64. The support part 70 is arranged spaced apart from the electric motor 58 above the electric motor and is connected to the holding part 68 and the fuel tank 64 by screws.

[0036] An electrical control device 74 is positioned on the support part 70. The control device 74 has a controller housing 76, which has a lower housing part 78 and an upper housing part 80. The controller housing 76 houses control elements 90, and these control elements are electrically connected to the electric motor 58 via cables 92. This can be clearly seen from Figure 3 and Figure 4 In Figure 5 For a better overview, the cables are hidden.

[0037] The top wall 94 of the upper housing part 80 is configured with an operation panel 96, and operation elements 98 in the form of knobs are arranged on the operation panel.

[0038] The bottom wall 95 of the lower housing part 78 forms a support surface, and the control housing 76 is supported on the support part 70 by means of this support surface.

[0039] The cover 100 of the high-pressure cleaning device 10 covers the control device 74, and the cover 100 has a notch 102 through which the user can access the control panel 96 and especially the operation elements 98.

[0040] As already mentioned, the control device 74 is electrically connected to the electric motor 58 via a plurality of cables 92. In the region between the electric motor 58 and the control housing 76, the cables 92 are surrounded by an elastically deformable protective hose in the form of a corrugated hose 104. The corrugated hose 104 has a first end section 106 assigned to the electric motor 58 and a second end section 108 assigned to the control device 74.

[0041] Especially from Figure 4 and Figure 5As can be clearly seen, the first end section 106 can be plugged into connection with a first hose connection part 110 arranged on the electric motor 58. The first hose connection part 110 is formed by a hose connection device 112. The hose connection device 112 is screwed to the motor housing 116 of the electric motor 58 with a sealing ring 114 arranged in the middle, wherein the first hose connection part 110 is oriented in alignment with the through-opening 117 of the motor housing 116. The cable 92 can be led out of the motor housing 116 via the through-opening 117.

[0042] The first hose connection part 110 is designed in the form of a first connection sleeve 118 and is surrounded by two hose guiding parts 120, 122 which are exactly opposite each other, which are arranged at a distance from the hose connection part 110 and extend in the circumferential direction over partial regions of the hose connection part 110 respectively. The two hose guiding parts 120, 122 form sleeve sections 124 or 126 respectively.

[0043] In the peripheral region not surrounded by the hose guiding parts 120, 122, the hose connection part 110 has on its outer side two locking protrusions 128, 130 or 132, 134 which are arranged axially offset from each other. This can be seen particularly clearly from Figure 5 and Figure 6 as is clearly visible.

[0044] The end of the first hose connection part 110 facing the through-opening 117 of the motor housing 116 is surrounded by an annular first stop element 136 which extends in the radial direction up to the hose guiding parts 120, 122.

[0045] The first end section 106 of the corrugated hose 104 can be plugged onto the sleeve-shaped first hose connection part 110 such that a locking connection is formed between the first end section 104 and the first hose connection part 110, wherein the end side of the first end section 106 abuts against the first stop element 136.

[0046] The second end section 108 of the corrugated hose 104 can be plugged into connection with a second hose connection part 138 arranged on the control device 74. The second hose connection part 138 is designed in the form of a second connection sleeve 140 which is formed onto the bottom wall 95 of the lower housing part 78 of the control housing 76. The second end section 108 can be inserted into the second hose connection part 138 until its end side abuts against a second stop element 142. The second stop element 142 is arranged at the end of the second hose connection part 138 which projects into the controller housing 76 and is constructed as a radially inwardly pointing flange 143.

[0047] The first hose connection part 110 is oriented vertically in the horizontal use position of the high-pressure cleaning device 10. The second hose connection part 138 is inclined at an angle of approximately 20° relative to the vertical line in the horizontal use position of the high-pressure cleaning device 10. Thus, the longitudinal axes 144, 146 of the two hose connection parts 110, 138 have vertical direction components that are parallel to each other. This allows the corrugated hose 104 to be clamped between the two stop elements 136, 142, wherein the elastically deformable corrugated hose 104 is compressed in the hose longitudinal direction and is fixed to the hose connection parts 110, 138 in a particularly simple manner due to its inherent stress.

[0048] By means of the corrugated hose 104, the mechanical load and the thermal load acting on the cable 92 in the region between the electric motor 58 and the control device 74 are significantly reduced. In addition, the corrugated hose 104 constitutes splash water protection for the cable 92 in the region between the electric motor 58 and the control device 74. The corrugated hose 104 can be very easily installed and plugged to the two hose connection parts 110, 138, and can be clamped between the stop elements 136, 138. The elastically deformable corrugated hose 104 can be held on the two hose connection parts 110, 138 in a simple manner due to its inherent stress. It is not necessary to design the end sections 106, 108, for example, in the form of connecting flanges or bushings. The corrugated hose 104 only has to be cut to the required length from the continuous material and can be plugged onto the first hose connection part 110 during the installation of the high-pressure cleaning device 10 to form a snap connection and inserted into the second hose connection part 138, wherein the corrugated hose 104 surrounds the electrical cable 92, and the cable is guided through the corrugated hose 104 and the two hose connection parts 110, 138.

Claims

1. A high-pressure cleaning device, the high-pressure cleaning device having: a motor pump unit (54), the motor pump unit having a pump (60) for pressurizing a cleaning liquid and an electric motor (58) for driving the pump (60); and an electrical control device (74) for controlling the electric motor (58), wherein, the control device (74) is arranged spaced apart from the motor pump unit above the motor pump unit and is connected to the electric motor (58) via at least one electrical cable (92), characterized in that the at least one cable (92) is surrounded in the region between the electric motor (58) and the control device (74) by an elastically deformable protective hose, the protective hose having a first end section (106) assigned to the electric motor (58) and a second end section (108) assigned to the control device (74), wherein the first end section (106) can be plugged onto a first hose connection part (110) arranged on the electric motor (58), and wherein the second end section (108) can be plugged onto a second hose connection part (138) arranged on the control device (74), and wherein the at least one cable can be guided through the protective hose and the two hose connection parts (110, 138).

2. The high-pressure cleaning device according to claim 1, characterized in that, the protective hose is designed as a corrugated hose.

3. The high-pressure cleaning device according to claim 1 or 2, characterized in that, the protective hose is designed as a metal corrugated hose (104).

4. The high-pressure cleaning device according to any one of the preceding claims, characterized in that, the longitudinal axes (144, 146) of the two hose connection parts (110, 138) have direction components oriented parallel to each other, and stop elements (136, 142) are respectively arranged at the hose connection parts (110, 138), against which the end sides of the protective hose can abut, wherein the protective hose can be clamped between the two stop elements (136, 142).

5. The high-pressure cleaning device according to any one of the preceding claims, characterized in that, the protective hose can be locked to the first hose connection part (110) and / or the second hose connection part (122).

6. The high-pressure cleaning device according to claim 5, characterized in that, At least one of the two hose connection parts, namely the hose connection part (110), is surrounded in a partial area of its periphery by at least one hose guiding part (120, 122) arranged at a distance from the hose connection part (110), and on the outside of this hose connection part, in the area of its periphery not surrounded by the hose guiding parts (120, 138), there are at least one locking projection (128, 130; 132, 134), wherein the protective hose can be inserted onto this hose connection part (110) and can be locked with this hose connection part (110) by means of the at least one locking projection (128, 130; 132, 134).

7. The high-pressure cleaning device according to any one of the preceding claims, characterized in that at least one of the two hose connection parts (110, 138) is designed as a sleeve type.

8. The high-pressure cleaning device according to any one of the preceding claims, characterized in that the high-pressure cleaning device (10) has a hose connection device (112), which forms the first hose connection part (110) and can be detachably connected to the motor housing (116) of the electric motor (58) with a sealing element (114) arranged in between.

9. The high-pressure cleaning device according to any one of the preceding claims, characterized in that the control device (74) has a controller housing (76) for accommodating at least one control element (90), wherein the second hose connection part (138) is formed on the controller housing (76).

10. The high-pressure cleaning device according to claim 9, characterized in that the controller housing (76) has a lower housing part (78) and an upper housing part (80), wherein the second hose connection part (138) is formed on the bottom wall (95) of the lower housing part (78).

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