Drive device for a high-pressure cleaning installation

Abstract

The invention relates to a drive device (10) for a high-pressure cleaning appliance, having a motor (12), a motor shaft (14) of the motor being mounted in a rotatable manner on a motor flange (18) and being coupled to a swash plate assembly (22) via a planetary gear (20), wherein the planetary gear (20) has a sun wheel (36) which is connected in a rotationally fixed manner to the motor shaft (14), the sun wheel engaging with planet wheels (38, 40) which are mounted in a rotatable manner on a planet carrier (46), the planet wheels being in meshing engagement with an internally toothed ring gear (34), and wherein the swash plate assembly (22) is positioned in an oil housing (52). In order to improve the drive device (10) in such a way that it has a longer service life and greater material selectivity can be achieved in manufacture, it is proposed according to the invention that the motor flange (18) and the oil housing (52) constitute separate components, wherein the motor flange (18) has the ring gear (34) and the oil housing (52) is fastened to the motor flange (18), wherein the motor flange (18) constitutes a centering portion for the oil housing (52).

Description

Technical Field

[0001] The present invention relates to a drive device for a high-pressure cleaning facility, the drive device having a motor shaft rotatably supported on a motor flange and coupled to a swashplate assembly via a planetary gear transmission, wherein the planetary gear transmission has a sun gear connected to the motor shaft in a non-rotatable manner, the sun gear meshing with planet gears supported on a planet carrier, the planet gears being engaged with an internally meshing ring gear, and wherein the swashplate assembly is positioned in an oil housing. Background Technology

[0002] The piston pump of a high-pressure cleaning facility can be driven by such a drive device. A swashplate assembly converts the rotational motion of the motor shaft into the reciprocating motion of the piston in the piston pump. The motor shaft defines the longitudinal axis of the drive device, and the piston can abut against a contact surface of the swashplate assembly that is inclined relative to the longitudinal axis. Such piston pumps are known to those skilled in the art. The swashplate assembly is coupled to the motor shaft via a planetary gear transmission, and the swashplate assembly can, for example, be connected to a planet carrier on which multiple, preferably two or three planet gears are rotatably supported. The planet gears are engaged, on one hand, with a sun gear that is anti-rotationally connected to the motor shaft, and on the other hand, with an internally meshing ring gear surrounding the planet gears.

[0003] Drive devices of the type described at the beginning are known from WO 2009 / 083154 A2 and DE 10 2005009 311A1. Furthermore, such drive devices are also known to those skilled in the art from US 2004 / 0016821A1. Summary of the Invention

[0004] The objective of this invention is to improve the type of drive device described at the beginning, so as to give it a longer service life and enable greater material selectivity in manufacturing.

[0005] This task is solved according to the invention in drive devices of the same category in such a way that the motor flange and the oil housing constitute separate components, wherein the motor flange has a toothed ring and the oil housing is fixed to the motor flange, wherein the motor flange constitutes a centering portion for the oil housing.

[0006] In the drive device according to the invention, the motor flange and the oil housing constitute separate components, wherein the oil housing is fixed to the motor flange, and the motor flange constitutes a centering part for the oil housing, that is, the motor flange centers the oil housing. Different materials, such as aluminum, die-casting materials, or plastic materials, can be used to manufacture the motor flange and the oil housing. By using different material pairings, the thermal characteristics of the drive device can be easily matched to different power levels of high-pressure cleaning facilities. The materials used for the oil housing and motor flange are optimized to extend the service life of the drive device. Although designed as separate components, the assembly of the oil housing onto the motor flange is very simple because the motor flange constitutes a centering part for the oil housing. With the help of the motor flange, the oil housing can be easily centered relative to the longitudinal axis of the drive device.

[0007] Preferably, the oil housing is connected to the motor flange in a form-locking manner.

[0008] Advantageously, the motor flange and oil housing have shape-locking elements that fit into each other. This facilitates the assembly of the oil housing onto the motor flange.

[0009] In an advantageous design of the drive device according to the invention, the motor flange has an annular groove, and the oil housing has an annular ring, wherein the annular ring fits precisely into the annular groove.

[0010] Advantageously, the oil housing can be secured to the motor flange with at least one sealing ring placed in the middle. The sealing ring prevents oil leakage in the area between the oil housing and the motor flange.

[0011] In a preferred embodiment of the drive device according to the invention, the swashplate assembly has a swashplate body, wherein a front support ring is arranged on the front side of the swashplate body away from the motor flange, and a pressure plate is supported on the front support ring via front rolling elements; and wherein a rear support ring is held on the rear side of the swashplate body facing the motor flange, the rear support ring being supported by rear rolling elements on a support ring held on an oil housing. The pressure plate, like the front support ring, is oriented obliquely relative to the longitudinal axis of the drive device and is configured with a contact surface for the piston of a piston pump for a high-pressure cleaning facility. The piston can be spring-loaded towards the contact surface, thereby driving the piston to reciprocate parallel to the longitudinal axis of the drive device as the swashplate body rotates about the longitudinal axis of the drive device. The pressure plate is supported on the front support ring via front rolling elements, the front support ring being supported by the swashplate body, and the front support ring is arranged on the front side of the swashplate body. The swashplate body is again supported in the axial direction on a support ring via a rear support ring and a rear rolling element, the support ring being supported by the oil housing. This design gives the swashplate assembly a high mechanical load capacity and extends the service life of the drive unit.

[0012] Advantageously, the swashplate has at least one front centering element and at least one rear centering element, wherein the at least one front centering element centers the front support ring, and wherein the at least one rear centering element centers the rear support ring.

[0013] Preferably, at least one centering element at the front passes through the support ring at the front.

[0014] Advantageously, the pressure plate is designed to be annular, and at least one front centering element passes through the pressure plate. In this design, the presence of at least one front centering element enables both the front support ring and the pressure plate to be centered and guided.

[0015] In a preferred embodiment of the invention, at least one rear centering element passes through the rear support ring.

[0016] Advantageously, the front support ring is press-fitted onto at least one front centering element, and / or the rear support ring is press-fitted onto at least one rear centering element.

[0017] Advantageously, the swash plate has a front centering element that forms a cylindrical sleeve that protrudes from the side of the base portion of the swash plate away from the motor flange, and whose central axis is inclined relative to the longitudinal axis of the drive unit.

[0018] Advantageously, the swash plate has a rear centering element that forms a cylindrical ring that protrudes from the base portion of the swash plate toward the motor flange and is coaxially oriented relative to the longitudinal axis of the drive unit.

[0019] In an advantageous embodiment of the invention, the swashplate body has a protrusion that at least partially surrounds the front support ring in the peripheral direction and preferably also surrounds the pressure plate.

[0020] Preferably, the protrusion extends from the side of the base portion of the swashplate away from the motor flange.

[0021] The protrusion can be designed, for example, as an annular segment that is coaxially oriented relative to the central axis of the cylindrical sleeve and extends in the peripheral direction over a portion of the front support ring and preferably also the pressure plate.

[0022] Preferably, the protrusion extends in an angle range of approximately 90° to 150°, especially 120°.

[0023] The base portion is preferably designed as a substrate.

[0024] Advantageously, the oil tank is constructed with a receiving portion into which the support ring is recessed, wherein the receiving portion supports the support ring in the axial and radial directions.

[0025] The receiving portion preferably has a cylindrical peripheral side surface and a flat bottom surface, wherein the peripheral side surface surrounds the support ring in the peripheral direction and is coaxially oriented relative to the longitudinal axis of the drive device, and wherein the bottom surface is positioned in a plane perpendicular to the longitudinal axis of the drive device. The peripheral side surface supports the support ring in the radial direction, while the bottom surface supports the support ring in the axial direction.

[0026] Preferably, the support ring is pressed into or inserted into the receiving portion.

[0027] The swash plate is advantageously connected to the planetary carrier in a way that resists relative rotation.

[0028] Advantageously, the swash plate is shaped and locked to the planet carrier.

[0029] For example, the swash plate can be configured to have a non-circular perforation, and the connecting section of the planetary carrier designed to complement the perforation can be recessed into the perforation.

[0030] The non-circular perforation is preferably designed in a star shape or profile, especially in a polygonal shape.

[0031] In a preferred embodiment of the invention, the swash plate has a hollow cone coaxially oriented relative to the longitudinal axis of the drive device, and a connecting section of the planetary carrier, designed to complement the hollow cone, is recessed into the hollow cone. The combination of the hollow cone of the swash plate and the complementary connecting section of the planetary carrier enables the planetary carrier to be coaxially centered relative to the longitudinal axis of the drive device, i.e., coaxially relative to the motor shaft.

[0032] Preferably, the planetary carrier has a hollow rod that passes through the swashplate body. This hollow rod allows oil from the oil pan to reach the planetary gear drive from the front side of the swashplate body away from the motor flange.

[0033] A particularly advantageous feature is that the hollow rod extends from the swashplate body in a direction away from the motor flange. In this design of the invention, the hollow rod utilizes its end region away from the motor flange to form an oil conduit, which can be submerged in an oil sump when the drive unit is operating along a substantially vertically oriented longitudinal axis, with the oil sump positioned below the motor. Oil can then be transported from the oil sump to the planetary gear transmission via the oil conduit.

[0034] In an advantageous embodiment of the invention, the swashplate body has at least one through-opening that forms a flow path for oil, allowing oil to travel from the front side of the swashplate body away from the motor flange to the rear side of the swashplate body facing the motor flange. Specifically, oil can travel from the front side of the swashplate body via at least one through-opening to the rear support ring, the rear rolling elements, and the support ring.

[0035] Advantageously, the swash plate is axially fixed to the planetary carrier. Axial fixing can be achieved, for example, by means of retaining rings, spring washers, or toothed locking washers, or by means of bolts. Attached Figure Description

[0036] The following description of advantageous embodiments of the invention is intended for a more detailed explanation in conjunction with the accompanying drawings. Wherein:

[0037] Figure 1 : A schematic cross-sectional view showing the drive unit for a high-pressure cleaning facility;

[0038] Figure 2 : Show Figure 1 A magnified sectional view of detail X;

[0039] Figure 3 : Show Figure 2 A magnified sectional view of the details of Y;

[0040] Figure 4 : Show Figure 1 A perspective view of the swashplate assembly of the drive unit;

[0041] Figure 5 Presented as an exploded diagram diagonally from the front. Figure 4 Perspective view of the swashplate assembly;

[0042] Figure 6 Presented as an exploded diagram viewed diagonally from behind. Figure 3 Perspective view of the swashplate component. Detailed Implementation

[0043] The figure schematically illustrates a preferred embodiment of the drive device for a high-pressure cleaning facility according to the present invention. The drive device is generally identified by reference numeral 10. The piston pump of the high-pressure cleaning facility can be driven by means of the drive device 10.

[0044] The drive unit 10 has an electric motor 12 with a motor shaft 14 that defines the longitudinal axis 16 of the drive unit 10 and is rotatably supported on a motor flange 18. The motor shaft 14 is coupled to a swashplate assembly 22 via a planetary gear transmission 20. The swashplate assembly 22 is configured with a flat contact surface 24 inclined relative to the longitudinal axis 16. Pistons 26 and 28 of a piston pump, known in high-pressure cleaning equipment, can rest against the contact surface 24. Pistons 26 and 28 can be spring-loaded towards the contact surface 24. The oscillating motion of the contact surface 24 causes pistons 26 and 28 to reciprocate parallel to the longitudinal axis 16.

[0045] Facing the swashplate assembly 22, the motor flange 18 has a recess 30 with a cylindrical peripheral wall 32 forming an internally meshing gear ring 34. The motor shaft 14 extends into the recess 30 at its end section 35 and carries the central sun gear 36 of the planetary gear transmission 20 in a rotationally resistant manner. This sun gear meshes with a plurality of planet gears, wherein... Figure 1 and Figure 2 Two planetary gears 38 and 40 can be seen. Planetary gears 38 and 40 are engaged with the sun gear 36 on one hand, and with the gear ring 34, which is coaxially oriented relative to the sun gear 30 and meshes internally.

[0046] Planetary gears 38 and 40 are rotatably held on carrier pins 42. Identical carrier pins 42 form part of the planet carrier 46 of the planetary gear transmission 20, wherein these carrier pins are integrally connected to hollow rods 48 coaxially oriented with respect to the longitudinal axis 16 of the planet carrier 46. The hollow rods 48 pass through the swashplate assembly 22 and extend from the swashplate assembly 22 via tubular end sections 50 in a direction away from the motor flange 18.

[0047] The swashplate assembly 22 is surrounded in the peripheral direction by an oil housing 52, which is precisely engaged with a first shape-locking element 56 designed as an annular ring 54 into a second shape-locking element 60 of the motor flange 18, which is designed as an annular groove 58. The annular groove 58 forms a centering portion of the oil housing 52 relative to the longitudinal axis 16 of the drive unit 10.

[0048] The oil casing 52 has a cylindrical annular wall 62 that surrounds the swashplate assembly 22 in the peripheral direction and transitions into an annulus 54 over a radially inwardly pointing shoulder 64. The shoulder 64 and the section of the annular wall 62 adjacent to the shoulder 64 combine to form a receiving portion 66 of the oil casing 52. The side of the shoulder 64 facing away from the motor flange 18 forms a flat bottom surface 68 of the receiving portion 66, while the section of the annular wall 62 adjacent to the shoulder 64 forms a cylindrical peripheral side surface 70 of the receiving portion 66.

[0049] The swash plate assembly 22 has a swash plate body 72, which has a base portion 74 in the form of a substrate 76. The substrate 76 has a non-circular through-hole 78. That is, the through-hole 78 is designed not to be circular. In the illustrated embodiment, the through-hole 78 is designed to be star-shaped. This is from... Figure 6 As can be seen, in the direction away from the motor flange 18, connected to the perforation 78 is a hollow cone 80 coaxially oriented with the relative longitudinal axis 16 of the swash plate 72. This hollow cone carries a safety element in the form of a spring washer 84 on its end 82 away from the motor flange 18. The spring washer 84 works in conjunction with the tubular end section 50 of the planetary carrier 46, thereby axially fixing the swash plate 72 to the planetary carrier 46 by means of the spring washer 84.

[0050] The planetary carrier 46 utilizes its hollow rod 48 to pass through a perforation 78 and a hollow cone 80, wherein a first connecting section 86 of the hollow rod 48, designed to be complementary to the perforation 78, precisely passes through the perforation 78, and a second connecting section 87, designed to be complementary to the hollow cone 80, precisely passes through the hollow cone 80. In the illustrated embodiment, the first connecting section 86 has a star-shaped outer profile, while the second connecting section 87 has a conical outer profile. This is from... Figure 5 and Figure 6 This can be seen particularly clearly in the image. The swash plate 72 is connected to the planetary carrier 46 in a way that resists relative rotation via a first connecting section 86 and a perforation 78. The second connecting section 87, in combination with the hollow cone 80, centers the planetary carrier 46 relative to the longitudinal axis 16 of the drive unit 10.

[0051] A front support ring 88 is arranged on the front side 73 of the swashplate body 72, away from the motor flange 18. The front support ring 88 is designed to be flat and inclined relative to the longitudinal axis 16. A ring-shaped pressure plate 90, oriented parallel to the front support ring 88, is supported on the front support ring 88 via a front rolling element 92. The pressure plate 90 is constructed with the aforementioned contact surface 24, on which pistons 26 and 28 rest.

[0052] The front rolling element 92 is arranged in a rolling element cage 94, which is positioned between the front support ring 88 and the pressure plate 90. Like the front support ring 88 and pressure plate 90, a centering element 98, designed as a cylindrical sleeve 96, passes through it. The sleeve 96 protrudes from the side of the base plate 76 opposite to the motor flange 18, wherein the central axis 100 of the sleeve 96 is inclined relative to the longitudinal axis 16. The sleeve 96 enables the front support ring 88, pressure plate 90, and rolling element cage 94 to be centered relative to the central axis 100.

[0053] A protrusion 99, in the form of an annular segment 101, is arranged on the side of the base plate 76 opposite to the motor flange 18, radially spaced from the sleeve 96 and coaxially oriented relative to its central axis 100. This protrusion partially surrounds the front support ring 88, rolling element cage 94, and pressure plate 90 in the peripheral direction. The protrusion extends over an angle range of approximately 120° and forms lateral stops for the support ring 88, rolling element cage 94, and pressure plate 90.

[0054] A rear support ring 102 is arranged on the rear side 75 of the swashplate body 72 facing the motor flange 18, and the rear support ring is supported on the support ring 106 via the rear rolling element 104. The support ring 106 is received by the receiving portion 66 of the oil housing 52, which supports the support ring 106 in the axial and radial directions.

[0055] The rear support ring 102 is centered relative to the longitudinal axis 16 by a rear centering element 110 of a cylindrical ring 108. The ring 108 is coaxially oriented relative to the longitudinal axis 16 and protrudes from the side of the base plate 76 facing the motor flange 18.

[0056] The base plate 76 of the swash plate 72 has a plurality of through openings 112 that form a flow path for oil, so that oil can flow from the front side 73 of the swash plate 72 away from the motor flange 18 to the rear side 75 of the swash plate 72 facing the motor flange 18.

[0057] Oil can also reach the recess 30 of the motor flange 18, in which the sun gear 36, planet gears 38 and 40 and the ring gear 34 are arranged, unimpeded from the swash plate 72 via the hollow rod 48 of the planet carrier 46.

[0058] The oil housing 52 is preferably made of aluminum, die-cast material, especially die-cast zinc, or plastic. The motor flange 18 is preferably made of metal or plastic, while the swashplate body 72 is also preferably made of aluminum, die-cast material, especially die-cast zinc, or plastic. Designing the oil housing 52 and motor flange 18 as separate components allows these components to be made of different materials. For example, the oil housing 52 can be constructed of different materials depending on the power rating of the high-pressure cleaning facility. The same applies to the swashplate body 72, which can be made of different materials depending on the power rating of the high-pressure cleaning facility.

[0059] In the illustrated embodiment, the swash plate 72 is axially secured to the planet carrier 46 by means of a spring washer 84. Alternatively, other safety elements, particularly bolts or retaining rings, may be used. It is also possible to screw the swash plate 72 to the planet carrier 46.

Claims

1. A drive device for a high-pressure cleaning facility, the drive device having a motor (12), the motor shaft (14) of which is rotatably supported on a motor flange (18) and coupled to a swashplate assembly (22) via a planetary gear transmission (20), wherein, The planetary gear transmission (20) has a sun gear (36) connected to the motor shaft (14) in a way that resists relative rotation. The sun gear meshes with planet gears (38, 40) that are rotatably supported on a planet carrier (46). The planet gears are engaged with an internally meshing ring gear (34). The swashplate assembly (22) is positioned in an oil housing (52). The characteristic feature is that the motor flange (18) and the oil housing (52) are separate components. The motor flange (18) has a ring gear (34), and the oil housing (52) is fixed to the motor flange (18), wherein the motor flange (18) forms a centering portion for the oil housing (52). The swashplate assembly (22) has a swashplate body (72), wherein a front support ring (88) is arranged on the front side (73) of the swashplate body (72) facing away from the motor flange (18), and a pressure plate (90) is supported on the front support ring via a front rolling element (92). A rear support ring (102) is arranged on the rear side (75) of the swashplate body (72) facing the motor flange (18), and the rear support ring is supported on a support ring (106) held on the oil housing (52) via a rear rolling element (104). The swashplate (72) has at least one front centering element (98) and at least one rear centering element (110), wherein the at least one front centering element (98) centers the front support ring (88), and wherein the at least one rear centering element (110) centers the rear support ring (102). The at least one front centering element (98) passes through the front support ring (88).

2. The driving device according to claim 1, characterized in that, The oil housing (52) is shaped-locked to the motor flange (18).

3. The driving device according to claim 1, characterized in that, The motor flange (18) and the oil housing (52) have shape-locking elements (56, 60) that fit into each other.

4. The driving device according to claim 1, characterized in that, The motor flange (18) has an annular groove (58), and the oil housing (52) has an annular ring (54) that fits precisely into the annular groove (58).

5. The driving device according to claim 1, characterized in that, The pressure plate (90) is designed to be annular, and the at least one front centering element (98) passes through the pressure plate (90).

6. The driving device according to claim 1, characterized in that, The at least one rear centering element (110) passes through the rear support ring (102).

7. The driving device according to claim 1, characterized in that, The swash plate (72) has a front centering element (98) that forms a cylindrical sleeve (96) that protrudes from the base portion (74) of the swash plate (72) away from the motor flange (18) and the central axis (100) of the sleeve is inclined relative to the longitudinal axis (16) of the drive device (10).

8. The driving device according to claim 7, characterized in that, The swash plate (72) has a rear centering element (110) that forms a cylindrical ring (108) that protrudes from the base portion (74) of the swash plate (72) toward the motor flange (18) and is coaxially oriented relative to the longitudinal axis (16).

9. The driving device according to claim 1, characterized in that, The swash plate (72) has a protrusion (99) that at least partially surrounds the front support ring (88) in the peripheral direction.

10. The driving device according to claim 9, characterized in that, The protrusion (99) also at least partially surrounds the pressure plate (90) in the peripheral direction.

11. The driving device according to claim 1, characterized in that, The oil housing (52) is configured with a receiving portion (66) into which the support ring (106) is recessed, wherein the receiving portion (66) supports the support ring (106) in the axial and radial directions.

12. The driving device according to claim 1, 2, 3 or 4, characterized in that, The swash plate (72) is shaped-locked to the planet carrier (46).

13. The driving device according to claim 12, characterized in that, The swash plate (72) has a non-circular perforation (78), and the connecting section (86) of the planet carrier (46) is designed to be complementary to the perforation (78) and fits precisely into the perforation.

14. The driving device according to claim 1, 2, 3 or 4, characterized in that, The swash plate (72) has a hollow cone (80) coaxially oriented relative to the longitudinal axis (16) of the drive device (10), and a connecting section (87) of the planetary carrier (46) designed to be complementary to the hollow cone (80) is recessed into the hollow cone.

15. The driving device according to claim 1, 2, 3 or 4, characterized in that, The planetary carrier (46) has a hollow rod (48) passing through the swashplate (72).

16. The driving device according to claim 15, characterized in that, The hollow rod (48) extends from the swashplate body (72) in a direction away from the motor flange (18).

17. The driving device according to claim 1, 2, 3 or 4, characterized in that, The swash plate (72) has at least one through opening (112) that forms a flow path for oil from the front side (73) of the swash plate (72) away from the motor flange (18) to the rear side (75) towards the motor flange (18).

18. The driving device according to claim 1, 2, 3 or 4, characterized in that, The swash plate (72) is axially fixed to the planet carrier (46).

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