High-pressure cleaning equipment

Abstract

The present invention relates to a high-pressure cleaning tool (10) having a tool housing (12) that encloses a motor-pump unit (38) including a motor (40) and a pump (42) and is held on the tool housing (12) via vibration-damping buffer elements (80, 82). To further develop the high-pressure cleaning tool so that it can be assembled more easily and generates less noise, it is proposed that the high-pressure cleaning tool (10) includes first and second holding devices (76, 78), each holding device (76, 78) including at least one pocket-type receptacle (100, 102, 104, 106), the pocket-type receptacles being arranged in axial alignment with pocket-type receptacles (116, 118, 120, 122, 148, 150, 152, 154) positioned on the motor-pump unit (38) with buffer elements (80, 82) interposed therebetween, the buffer elements including two axially opposing end portions (108, 124, 156, 166), each of the end portions being received by one of the pocket-type receptacles, and the buffer elements being fixed axially and radially by the pocket-type receptacles.

Description

[Technical Field]

[0001] The present invention relates to a high-pressure cleaning tool having an appliance housing enclosing a motor-pump unit including a motor and a pump driven by the motor, the motor-pump unit being held on the appliance housing via a vibration-damping buffer element. [Background technology]

[0002] Such high pressure cleaning implements are used, for example, to clean a surface by directing a pressurized cleaning fluid, preferably water, onto the surface. The cleaning fluid is pressurized by a pump driven by a motor.

[0003] Electric motors are often used as motors. Here, the electric motor can be cooled by a pressurized cleaning liquid, which for this purpose is first supplied to a cooling tube that surrounds the motor in the circumferential direction and then to a pump inlet, so that the cleaning liquid can be pressurized by the pump and then dispensed via the pump outlet. For example, a high-pressure hose can be connected to the pump outlet, and a spray rod, for example, can be arranged at the free end of the high-pressure hose.

[0004] The motor, pump, and transmission device disposed between the motor and pump together often form a unit, hereinafter referred to as the motor-pump unit, which can be pre-assembled during manufacture of the pressure cleaning tool and then inserted into the tool housing.

[0005] The operation of such high-pressure cleaning tools is accompanied by noise. WO 2010 / 054701 A1 proposes attaching a motor pump unit to the tool housing via a vibration-damping buffer element. This prevents a rigid connection of the motor pump unit to the housing and reduces the transmission of vibrations from the motor pump unit to the tool housing. However, the use of a vibration-damping buffer element often makes assembly of the high-pressure cleaning tool more difficult, and in particular, the vibration-damping buffer element often makes it more difficult to insert the motor pump unit into the tool housing. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] WO 2010 / 054701 A1 Summary of the Invention [Problem to be solved by the invention]

[0007] It is therefore an object of the present invention to further develop a high-pressure cleaning appliance of the type mentioned at the outset so that it can be assembled more simply but still be quiet. [Means for solving the problem]

[0008] This object is achieved, according to the present invention, by providing a high-pressure cleaning tool of a generic kind, said high-pressure cleaning tool comprising first and second retaining devices, said first and second retaining devices being fixed to said tool housing, said first retaining device comprising at least one first pocket-type receptacle, said first pocket-type receptacle being arranged in axial alignment with a second pocket-type receptacle positioned on said motor-pump unit with a first vibration-damping buffer element interposed therebetween, said first vibration-damping buffer element comprising two axially opposite end portions, each of said two end portions being received by one of said first and second pocket-type receptacles, said first vibration-damping buffer element comprising at least one first pocket-type receptacle and said first vibration-damping buffer element being arranged in axial alignment with a second pocket-type receptacle positioned on said motor-pump unit with a first vibration-damping buffer element interposed therebetween, said first vibration-damping buffer element comprising two axially opposite end portions, each of said two end portions being received by one of said first and second pocket-type receptacles, This is achieved by the fact that the vibration damping buffer element is fixed axially and radially by the first and second pocket-type receptacles, the second holding device includes at least one third pocket-type receptacle, which is arranged in axial alignment with a fourth pocket-type receptacle positioned on the motor pump unit with a second vibration damping buffer element therebetween, the second vibration damping buffer element having two axially opposing end portions, each of which is received by one of the third and fourth receptacles, and the second vibration damping buffer element is fixed axially and radially by the third and fourth receptacles.

[0009] In the high-pressure cleaning tool according to the present invention, the motor pump unit is mounted via first and second vibration-damping buffer elements and first and second retaining devices, the first and second retaining devices being fixed to the tool housing, a first pocket-type receptacle being arranged in the first retaining device, an axial end portion of at least one first vibration-damping buffer element being received in the first pocket-type receptacle, a second axial end portion of at least one first buffer element axially opposite to the first axial end portion being received in a second pocket-type receptacle being arranged on the motor pump unit and oriented in axial alignment with the first pocket-type receptacle of the first retaining device.

[0010] Correspondingly, at least one third pocket-type receptacle is disposed on the second retaining device, the third pocket-type receptacle being oriented in axial alignment with a fourth pocket-type receptacle disposed on the motor-pump unit, the third and fourth receptacles receiving axially opposite end portions of a second vibration-damping buffer element.

[0011] At least one of the first buffer elements is axially and radially secured by first and second pocket-type receptacles, and at least one of the second vibration-damping buffer elements is axially and radially secured by the third and fourth receptacles.

[0012] In this way, the high-pressure cleaning tool according to the present invention includes a pair of pocket-type receptacles oriented in axial alignment with each other, with vibration-damping buffer elements respectively positioned between the pair of receptacles, and axially opposing end portions of the vibration-damping buffer elements each being received by the pocket-type receptacle so that the buffer elements are fixed both axially and radially.

[0013] The axial orientation of the pocket-type receptacles into which the vibration-damping buffer elements fit allows for simpler assembly of the high-pressure cleaning tool, in particular making it easier to insert the motor-pump unit into the tool housing. Furthermore, it has been shown that using pairs of pocket-type receptacles oriented axially in line with one another can be particularly effective in reducing the transmission of both axial and radial vibrations from the motor-pump unit to the tool housing. In this way, the noise emitted by the high-pressure cleaning tool according to the present invention is very low.

[0014] Preferably, the first and second retaining devices are arranged at an axial distance from each other relative to the longitudinal axis of the motor pump unit, in this way a particularly stable mounting of the motor pump unit in the appliance housing can be achieved.

[0015] Preferably, the first holding device includes a plurality of first pocket-type receptacles, each of which is arranged in axial alignment with the second pocket-type receptacle positioned on the motor-pump unit with a first vibration-damping buffer element interposed therebetween, and each of the first buffer elements includes two axially opposing end portions, each of which is received by one of the first and second receptacles. In this configuration of the high-pressure cleaning tool according to the present invention, a plurality of first vibration-damping buffer elements are used, and the motor-pump unit is mechanically connected to the first holding device via this plurality of first vibration-damping buffer elements by pairs of the pocket-type receptacles arranged in axial alignment with each other. The first buffer elements are fixed axially and radially by the first receptacles arranged on the first holding device and the second receptacles arranged on the motor-pump unit. The use of a plurality of first vibration-damping buffer elements makes it possible to damp particularly effectively both axial and radial vibrations of the motor-pump unit.

[0016] Preferably, the second pocket-type receptacles are distributed around the periphery of the motor pump unit.

[0017] It is particularly advantageous if the second pocket-type receptacles are evenly distributed over the circumference of the motor-pump unit.

[0018] For example, three, four or six second pocket-type receptacles may be distributed around the periphery of the motor pump unit.

[0019] Preferably, the first and second pocket-type receptacles each extend along an outer edge of the axial end portion of the first buffer element and abut against an end face of the axial end portion.

[0020] For example, the first and second pocket-type receptacles may have a U-shaped cross-section.

[0021] In an advantageous embodiment of the invention, the first retaining device forms a retaining ring, which circumferentially surrounds the motor-pump unit while leaving an annular gap.

[0022] In an advantageous embodiment of the invention, a particularly simple assembly of the high-pressure cleaning tool according to the invention is achieved in that the retaining ring comprises two diametrically opposed radial extensions, each of which fits into an internal housing receptacle of the tool housing. For example, the tool housing may comprise front and rear housing half-shells, which accommodate the motor-pump unit between them and each of which comprises a housing receptacle inside, into which the extensions of the retaining ring fit.

[0023] Preferably, the extensions each form a positive engagement with a housing receptacle, which allows for a particularly secure mounting of the retaining ring on the instrument housing.

[0024] Advantageously, each of said extension portions is detachably connected to said housing receptacle by means of a connecting element, for example a connecting screw may be used as connecting element.

[0025] In an advantageous embodiment of the present invention, the retaining ring includes two half rings, each of which includes at least one first pocket-shaped receptacle. The two half rings may extend in the circumferential direction of the motor-pump unit. In particular, the two half rings may each extend over an angular range of approximately 180°. The use of the half rings further simplifies the assembly of the high-pressure cleaning tool.

[0026] Preferably, the two half rings are connected to each other. In particular, the two half rings may be detachably connected to each other.

[0027] Preferably, each of the two half rings is removably connected to the instrument housing, which increases the overall stability of the retaining ring.

[0028] In an advantageous embodiment of the present invention, the second holding device includes a plurality of third pocket-type receptacles, each of which is arranged in axial alignment with a fourth pocket-type receptacle positioned on the motor-pump unit via a second vibration-damping buffer element therebetween, and each second vibration-damping buffer element includes two axially opposing end portions, each of which is received by one of the third and fourth receptacles. In such an embodiment of the present invention, a plurality of second vibration-damping buffer elements are used, and the second holding device is mechanically connected to the motor-pump unit via the second vibration-damping buffer elements. The second buffer elements are fixed axially and radially by the third and fourth receptacles, and the second buffer elements make it possible to effectively damp vibrations of the motor-pump unit in both the axial and radial directions.

[0029] Preferably, the third and fourth pocket-type receptacles each extend along the outer edge of the axial end portion of the second vibration-damping buffer element and abut against an end face of the axial end portion.

[0030] For example, the third and fourth pocket-type receptacles may have a U-shaped cross-section.

[0031] In a preferred embodiment of the invention, the second holding device forms a support member on which the motor pump unit rests during operation of the high pressure cleaning tool.

[0032] At least one of the fourth pocket-type receptacles may be arranged, for example, on the outside of a base wall of the motor pump unit.

[0033] Preferably, the support member includes a support body, and at least one third pocket-type receptacle is arranged on an upper surface of the support body pointing towards the motor-pump unit, which can be axially supported via the support body in a structurally simple manner with at least one second vibration-damping buffer element interposed therebetween.

[0034] Preferably, the support is rotationally symmetrical with respect to the longitudinal axis of the motor-pump unit.The support may, for example, have the form of a cylinder or a truncated cone.

[0035] Advantageously, the support member comprises a base on which the support is arranged and which fits into a holder arranged internally on the base wall of the appliance housing, which holder allows the support member to be fixed to the appliance housing in a structurally simple manner.

[0036] It is particularly advantageous if the first and second buffer elements are of identical construction, which further simplifies the assembly process and allows the buffer elements to be manufactured in larger quantities and therefore more cost-effectively.

[0037] Preferably, the first and second buffer elements are of plate-like configuration.

[0038] The first and second buffer elements preferably consist of a foam material, preferably a microcellular polyurethane elastomer, which allows particularly effective damping of vibrations of the motor-pump unit, so that these vibrations are only transmitted to the appliance housing to a very small extent.

[0039] In an advantageous embodiment of the invention, the motor pump unit comprises first and second motor housing parts which are connected to one another via two connecting flanges, and at least one second pocket-type receptacle is arranged on one of the two connecting flanges.

[0040] Preferably, at least one said second pocket-type receptacle is arranged on a side of said connection flange pointing away from the other said connection flange.

[0041] As already mentioned at the beginning, the motor of the high-pressure cleaning tool according to the invention is preferably configured as a liquid-cooled electric motor, which makes ventilation holes in the tool housing unnecessary, thereby further reducing the noise generated by the high-pressure cleaning tool.

[0042] In a particularly preferred embodiment of the invention, further noise reduction is achieved by the pump including a pump outlet connected via a flexible hose conduit to a liquid outlet portion carried on the appliance housing. By providing a flexible hose conduit between the pump outlet and the liquid outlet portion carried on the appliance housing, the transmission of mechanical vibrations from the pump outlet to the appliance housing is reduced, thereby reducing the noise generated by the high-pressure cleaning appliance.

[0043] For further explanation, advantageous embodiments of the invention are described below in conjunction with the drawings. [Brief explanation of the drawings]

[0044] [Figure 1] 1 shows a perspective view of a high-pressure cleaning tool. [Figure 2] 2 shows a cross-sectional view of the high pressure cleaning tool taken along line 2-2 of FIG. 1. [Figure 3] 2 shows a perspective view of the front housing half shell of the high pressure cleaning tool of FIG. 1. FIG. [Figure 4] 2 shows a perspective view of the rear housing half-shell of the high pressure cleaning tool of FIG. 1. [Figure 5] 1 shows a side view of a motor pump unit of a high pressure cleaning tool, the motor pump unit being circumferentially surrounded by a first retaining device in the form of a retaining ring and resting on a second retaining device in the form of a support member. [Figure 6]6 shows a perspective view of the motor pump unit together with the retaining ring and support member of FIG. 5. FIG. [Figure 7] 6 shows a perspective view of the motor pump unit with the retaining ring and the support member of FIG. 5, with the half rings of the retaining ring and the first vibration damping buffer element hidden. [Figure 8] FIG. 1 shows a cross-sectional view of a liquid-cooled electric motor of a motor-pump unit. [Figure 9] 9 shows a cross-sectional view of the motor pump unit taken along line 9-9 in FIG. 5. [Figure 10] 1 shows a perspective view of a retaining ring viewed obliquely from below, the retaining ring including a plurality of first pocket-type receptacles. [Figure 11] 11 shows a perspective view of the retaining ring of FIG. 10 with the first vibration-damping buffer element inserted into the first pocket-type receptacle. [Figure 12] 1 shows a perspective view of the support member as seen obliquely from above, the support member including a plurality of third pocket-type receptacles. [Figure 13] 13 shows a perspective view of the support member of FIG. 12, with the second vibration-damping buffer element inserted into the third pocket-shaped receptacle. [Figure 14] FIG. 10 is a perspective view of a holder into which the support member fits. [Figure 15] 1 shows a perspective view of a flexible hose conduit, in which the pump outlet of the conduit motor pump unit is connected via a flexible hose to a liquid outlet fixed to the rear housing half-shell. DETAILED DESCRIPTION OF THE INVENTION

[0045] An advantageous embodiment of a high-pressure cleaning tool according to the invention is shown diagrammatically in the drawings, the high-pressure cleaning tool being generally designated by the reference numeral 10. The high-pressure cleaning tool 10 comprises a tool housing 12 formed by a front housing half-shell 14 and a rear housing half-shell 16. In the illustrated embodiment, a hose reel 18 is arranged on the outside of the rear housing half-shell 16, on which a high-pressure hose 20 is wound. However, such a hose reel is not absolutely necessary.

[0046] The rear housing half-shell 16 includes a rear wall 22 that is designed like a trough and has a number of reinforcing ribs 24 arranged on the inside thereof. Wheels 30, 32 are rotatably mounted on the outside of the opposed side walls 26, 28 of the rear housing half-shell 16, allowing the high-pressure cleaning tool 10 to be moved by the wheels.

[0047] The front housing half-shell 14 is configured like a hood and carries on its front face 34 facing away from the rear housing half-shell 16 a rotary switch 36 by means of which the high-pressure cleaning tool 10 can be turned on and off.

[0048] The two housing half-shells 14, 16 house a motor-pump unit 38 between them, which includes a liquid-cooled electric motor 40 and a pump 42 driven by the electric motor. The motor-pump unit 38 further includes an electrical switching device 44, which is connected to the rotary switch 36 via a switching shaft 46.

[0049] As can be seen particularly from Figures 5 and 8, the electric motor 40 comprises a motor housing 48 with a pot-shaped first motor housing part 50 and a hood-shaped second motor housing part 52 that covers the first motor housing part 50. The first motor housing part 50 forms a first connecting flange 54 into which a cooling tube 56 is molded, and the second motor housing part 52 forms a second connecting flange 58. The two motor housing parts 50, 52 are connected to each other via the two connecting flanges 54, 58. For this purpose, the two connecting flanges 54, 58 are screwed together by means of connecting screws 60.

[0050] The cleaning liquid to be pressurized can be supplied to the cooling pipe 56 via a rigid inlet conduit 62 passing through an inlet opening 64 in the front housing half-shell 14. For this purpose, a supply conduit, for example a supply hose, which is known per se and therefore not shown, can be connected to the end of the inlet conduit 62 protruding from the front housing half-shell 14.

[0051] Cooling tube 56 is in flow communication with pump inlet 68 via connecting conduit 66 so that cleaning fluid to be pressurized can be supplied to pump 42 after the cleaning fluid flows through cooling tube 56, thereby cooling electric motor 40. The cleaning fluid is pressurized by pump 42 and dispensed via pump outlet 70.

[0052] 15, the pump outlet 70 is connected via a flexible hose conduit 72 to a rigid liquid outlet 74 which passes through and is fixed to the rear wall 22 of the rear housing half-shell 16. Adjacent to the liquid outlet 74 is the high-pressure hose 20 which is wound onto the hose reel 18.

[0053] To mount the motor-pump unit 38 to the two housing half-shells 14, 16, the high-pressure cleaning tool 10 includes a first holding device 76 and a second holding device 78. The first holding device 76 is connected to the motor-pump unit 38 via a first vibration-damping buffer element 80, and the second holding device 78 is connected to the motor-pump unit 38 via a second vibration-damping buffer element 82, as will be described in more detail below.

[0054] The first retaining device 76 forms a retaining ring 84 that circumferentially surrounds the motor-pump unit 38 above the second connecting flange 58 while forming an annular gap 86. The retaining ring 84 is formed by two half rings 88, 90, each of which extends circumferentially over an angular range of 180°. The two half rings 88, 90 are connected to each other.

[0055] In the illustrated embodiment, one of the two half rings 88, 90 has a connecting pin 92, which is T-shaped in cross section and engages behind a connecting slot 94 in the other of the two half rings 88, 90. This is particularly evident in Figures 2 and 6.

[0056] Two first pocket-type receptacles 100, 102, 104, 106 are molded in the bottom surfaces of both half rings 88, 90 facing the first motor housing part 50, and an axial upper end portion 108 of the first vibration-damping buffer element 80 fits into each of the first pocket-type receptacles 100, 102, 104, 106. Each of the first pocket-type receptacles 100, 102, 104, 106 extends along the outer edge of the axial upper end portion 108 and abuts against an upper end face 112 thereof. This is particularly apparent from Figures 8 and 9.

[0057] The motor pump unit 38 includes second pocket-type receptacles 116, 118, 120, 122 on an upper surface 114 of the second connecting flange 58 facing the retaining ring 84, and the second pocket-type receptacles 116, 118, 120, 122 are each oriented in alignment with the first pocket-type receptacles 100, 102, 104, and 106, respectively. The second pocket-type receptacles 116, 118, 120, 122 each receive an axial lower end portion 124 of the first vibration-damping buffer element 80, the lower end portion 124 being positioned axially opposite the upper end portion 108. The second receptacles 116, 118, 120, 122 each extend along the outer edge of the axial lower end portion 124 and abut a lower end surface 130 thereof facing the second connecting flange 58.

[0058] In this manner, the first and second pocket-type receptacles 100, 102, 104, 106, 116, 118, 120, 122 are oriented in pairs and aligned with one another, each housing a first vibration-damping buffer element 80 therebetween, with the first vibration-damping buffer element 80 being secured axially and radially by the first and second receptacles.

[0059] The first vibration-damping buffer elements 80 are evenly distributed around the circumference of the motor-pump unit 38. In the illustrated embodiment, the first vibration-damping buffer elements 80 and the second vibration-damping buffer elements 82, described in more detail below, are identical in construction and are made of a microcellular polyurethane elastomer.

[0060] The second holding device 78 forms a support member 132 on which the motor-pump unit 38 rests with a plurality of second vibration-damping buffer elements 82 interposed therebetween. The support member 132 includes a trough-shaped base portion 134 that fits into a holder 136 of the front housing half-shell 14. The holder 136 is arranged inside a base wall 138 of the front housing half-shell 14.

[0061] The motor pump unit 38 has a longitudinal axis 140 oriented coaxially with the motor shaft 142 of the electric motor 40. Abutting the base 134 of the support member 132 is a support 144 of the support member 132, which is oriented rotationally symmetrically with respect to the longitudinal axis 140 in the direction of the motor pump unit 38. Four identical third pocket-type receptacles 148, 150, 152, 154 are molded on an upper surface 146 of the support 144 pointing toward the motor pump unit 38, and each third pocket-type receptacle receives an axial lower end portion 156 of the second vibration-damping buffer element 82. Each third pocket-type receptacle 148, 150, 152, 154 extends along the outer edge of the lower end portion 156 and abuts against its lower end face 158.

[0062] The motor pump unit 38 includes four identical fourth pocket-style receptacles on the exterior of the base wall 160 of the first motor housing portion 50, each oriented in alignment with the third pocket-style receptacle of the support member 132. Only two fourth pocket-style receptacles 162, 164 are shown in the drawings. An axial upper end portion 166 of each second vibration-damping buffer element 82 fits into each of the fourth pocket-style receptacles 162, 164, and each fourth pocket-style receptacle 162, 164 extends along the outer edge of the axial upper end portion 166 and abuts against an upper end surface 168 thereof.

[0063] In this manner, the third and fourth pocket-shaped receptacles 148, 150, 152, 154, 162, 164 are oriented in pairs and aligned with one another, and each accommodates the second vibration damping buffer element 82 therebetween, with the second vibration damping buffer element 82 being secured axially and radially by the third and fourth receptacles.

[0064] The motor-pump unit 38 is mounted to the tool housing 12 via a first vibration-damping buffer element 80 and a second vibration-damping buffer element 82 and two retaining devices 76, 78. The second retaining device 78 in the form of a support member 132 is held on the tool housing 12 by a holder 136, while the first retaining device 76 in the form of a retaining ring 84 is fixed to the tool housing 12 by a front housing receptacle 170 arranged inside the front housing half-shell 14 and a rear housing receptacle 172 arranged inside the rear housing half-shell 16. For this purpose, the retaining ring 84 includes two diametrically opposed radial extensions 174, 176, each of which extends into one of the two housing receptacles 170, 172. The extensions 174, 176 are formed by end portions 178, 180, 182, 184 of the two half-rings 88, 90. In both cases, the front end portions 178, 182 of the two half rings 88, 90 thereby extend into the forward housing receptacle 170, and in both cases, the rear end portions 180, 184 of the two half rings 88, 90 extend into the rear housing receptacle 172. The end portions 178, 180, 182, 184 of the half rings 88, 90 can thereby be screwed into their respective housing receptacles 170, 172.

[0065] The high-pressure cleaning tool 10 according to the invention is characterized by very effective damping of axial and radial vibrations of the motor-pump unit, such that the high-pressure cleaning tool 10 generates only a small amount of noise. The axial orientation of the pocket-shaped receptacles into which the first and second buffer elements 80, 82 fit allows the vibration-damping buffer elements 80, 82 to be mounted axially, after which the motor-pump unit 38 together with the two holding devices 76, 78 can be simply inserted into the rear housing half-shell 16, so that the front housing half-shell 14 can be placed on the rear housing half-shell 16 and the motor-pump unit 38 can be placed therein. The high-pressure cleaning tool 10 according to the invention is therefore also characterized by easy assembly.

Claims

1. A high-pressure cleaning tool comprising a tool housing (12) enclosing a motor-pump unit (38) including a motor (40) and a pump (42) driven by the motor (40), A high-pressure cleaning tool, wherein the motor pump unit (38) is held on the tool housing (12) via vibration-damping buffer elements (80, 82), The high-pressure cleaning tool (10) includes first and second retaining devices (76, 78), the first and second retaining devices (76, 78) being secured to the tool housing (12); the first retaining device includes at least one first pocket-type receptacle (100, 102, 104, 106), the first pocket-type receptacle (100, 102, 104, 106) being arranged in axial alignment with a second pocket-type receptacle (116, 118, 120, 122) positioned on the motor-pump unit (38) with a first vibration-damping buffer element (80) interposed therebetween; the first vibration-damping buffer element (80) includes two axially opposed end portions (108, 124), each of which is received by one of the first and second pocket-type receptacles; the first vibration-damping buffer element (80) is axially and radially secured by the first and second receptacles; the second retaining device (78) includes at least one third pocket-type receptacle (148, 150, 152, 154), the third pocket-type receptacle (148, 150, 152, 154) being arranged in axial alignment with a fourth pocket-type receptacle (162, 164) positioned on the motor-pump unit (38) with a second vibration-damping buffer element (82) interposed therebetween; the second vibration-damping buffer element (82) includes two axially opposed end portions (156, 166), each of which is received by one of the third and fourth receptacles; the second vibration-damping buffer element is axially and radially secured by the third and fourth receptacles; High-pressure cleaning equipment characterized by:

2. 2. The high-pressure cleaning tool according to claim 1, wherein the first and second retaining devices (76, 78) are arranged at an axial distance from each other relative to the longitudinal axis (140) of the motor-pump unit (38).

3. The high-pressure cleaning tool according to claim 1 or 2, the first retaining device (76) includes a plurality of first pocket-type receptacles (100, 102, 104, 106), each of which is arranged in axial alignment with a second pocket-type receptacle (116, 118, 120, 122) positioned on the motor-pump unit (38) with a first vibration-damping buffer element (80) interposed therebetween; each first vibration-damping buffer element (80) includes two axially opposed end portions (108, 124), each of which is received by one of the first and second receptacles; High-pressure cleaning equipment characterized by:

4. 4. The high-pressure cleaning tool according to claim 3, wherein the second pocket-type receptacles (116, 118, 120, 122) are distributed around the periphery of the motor pump unit (38).

5. 5. A high-pressure cleaning tool according to claim 1, wherein the first and second pocket-type receptacles (100, 102, 104, 106, 116, 118, 120, 122) each extend along an outer edge of an axial end portion (108, 124) of the first vibration-damping buffer element (80) and abut against an end face (112, 130) of the axial end portion (108, 124).

6. 6. The high-pressure cleaning tool according to claim 1, wherein the first retaining device (76) forms a retaining ring (84), which circumferentially surrounds the motor pump unit (38) while forming an annular gap (86).

7. 7. The high-pressure cleaning tool of claim 6, wherein the retaining ring (84) includes two diametrically opposed radial extensions (174, 176), each of which extends into an inner housing receptacle (170, 172) of the tool housing (12).

8. 8. The high pressure cleaning tool of claim 7, wherein each of said extension portions (174, 176) forms a positive engagement with a housing receptacle (170, 172).

9. 9. A high-pressure cleaning tool according to claim 7 or 8, characterized in that the extension portions (174, 176) are each detachably connected to the housing receptacle (170, 172) by a connecting element.

10. 10. The high-pressure cleaning tool according to claim 6, wherein the retaining ring (84) includes two half rings (88, 90), and each of the two half rings (88, 90) includes at least one first pocket-type receptacle (100, 102, 104, 106).

11. 11. The high pressure cleaning tool according to claim 10, characterized in that the half rings (88, 90) are detachably connected to each other.

12. 12. A high-pressure cleaning tool according to claim 10 or 11, characterized in that each of the two half rings (88, 90) is detachably connected to the tool housing (12).

13. A high-pressure cleaning tool according to any one of claims 1 to 12, the second retaining device (78) includes a plurality of third pocket-type receptacles (148, 150, 152, 154), each of which is axially aligned with a fourth pocket-type receptacle (162, 164) positioned on the motor-pump unit (38) with a second vibration-damping buffer element (82) interposed therebetween; each second vibration-damping buffer element (82) including axially opposed end portions (156, 166), each of said end portions (156, 166) being received by one of said third and fourth receptacles; High-pressure cleaning equipment characterized by:

14. 14. The high-pressure cleaning tool according to claim 13, wherein the third and fourth pocket-type receptacles each extend along an outer edge of an axial end portion (156, 166) of the second vibration-damping buffer element (82) and abut against an end face (158, 168) of the axial end portion (156, 166).

15. 15. A high-pressure cleaning tool according to any one of claims 1 to 14, characterized in that the second holding device (78) forms a support member (132) on which the motor pump unit (38) rests during operation of the high-pressure cleaning tool (10).

16. 16. The high-pressure cleaning tool according to claim 15, wherein at least one of the fourth pocket-type receptacles (162, 164) is disposed outside a base wall (160) of the motor pump unit (38).

17. 17. The high-pressure cleaning tool according to claim 15 or 16, wherein the support member (132) includes a support (144), and at least one of the third pocket-type receptacles (148, 150, 152, 154) is arranged on an upper surface (146) of the support (144) pointing toward the motor pump unit (38).

18. 18. The high-pressure cleaning tool according to claim 17, characterized in that the support (144) is rotationally symmetrical with respect to the longitudinal axis (140) of the motor-pump unit (38).

19. 19. A high-pressure cleaning tool according to claim 17 or 18, characterized in that the support member (132) includes a base portion (134) on which the support (144) is arranged, and the base portion (134) fits into a holder arranged internally on a base wall (138) of the tool housing (12).

20. A high-pressure cleaning tool according to any one of the preceding claims, characterized in that the first and second buffer elements (80, 82) are of identical construction.

21. A high-pressure cleaning appliance according to any one of the preceding claims, characterized in that the first and second buffer elements (80, 82) are of plate-like configuration.

22. A high-pressure cleaning appliance according to any one of the preceding claims, characterized in that the first and second buffer elements (80, 82) consist of a microcellular polyurethane elastomer.

23. A high-pressure cleaning tool according to any one of claims 1 to 22, the motor pump unit (38) includes first and second motor housing parts (50, 52), the first and second motor housing parts (50, 52) being connected to each other via two connecting flanges; at least one second pocket-type receptacle (116, 118, 120, 122) is disposed on one of the two connection flanges (58); High-pressure cleaning equipment characterized by:

24. 24. The high-pressure cleaning appliance according to any one of claims 1 to 23, wherein the pump (42) includes a pump outlet (70), the pump outlet (70) being connected via a flexible hose conduit (72) to a liquid outlet portion (74) carried on the appliance housing (12).

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