Tank cleaners and assembly methods

Abstract

The invention relates to a tank cleaner (1) comprising a stationary body (3) for coupling to a supply line (6) for receiving a cleaning fluid, a rotating body (4) mounted on the stationary body (3), a gear assembly (10) partially arranged in the stationary body (3) with a main input shaft (120) and a main output shaft (130) for driving the rotating body (4), and a nozzle carrier (8) mounted on the rotating body (4) with a secondary output shaft (81) driven by the main output shaft (130), and at least one nozzle (82) for dispensing the cleaning fluid. The invention proposes that the main output shaft (130) has a distal end (132) extending beyond the secondary output shaft (81) along a main axis of rotation (R1) about which the rotating body is rotatably mounted. The invention further relates to a method (1000) for assembling a tank cleaner.

Description

[0001] The present invention relates to a tank cleaner, in particular an orbital cleaner, for cleaning a tank.The tank cleaner comprises a static body with a housing having an upper housing part configured for connection to a supply line for receiving a cleaning fluid and a lower housing part, a rotating body rotatable about a main axis of rotation and mounted on the static body, a gear assembly comprising a gearbox with a main input shaft and a main output shaft extending beyond the housing and configured to drive the rotating body about the main axis of rotation, and a nozzle carrier rotatable about a secondary axis of rotation and mounted on the rotating body, wherein the nozzle carrier has a secondary output shaft extending in the direction of the secondary axis of rotation and driven by the main output shaft, and at least one nozzle for dispensing the cleaning fluid, wherein the secondary axis of rotation is different from the main axis of rotation.

[0002] In the field of tank cleaning, particularly in industrial and commercial environments, it is common to use tank cleaners that employ rotating nozzles to deliver high-pressure cleaning fluids. These devices are essential for maintaining hygiene and operational efficiency in tanks used to store various substances, including food, chemicals, and pharmaceuticals. Common systems typically comprise a combination of static and rotating components driven by fluid pressure to achieve the desired cleaning effect. The rotating nozzles are generally driven by a gear assembly that converts the fluid pressure into a rotary motion.

[0003] According to known approaches, tank cleaners typically consist of a static body connected to a supply line for receiving the cleaning fluid and a rotating body housing the nozzles. DE 10 2019 005 830 A1 shows such a tank cleaner. The rotating body is driven by a gear assembly that converts the fluid pressure into rotary motion. However, these systems often suffer from problems such as complex assembly and disassembly processes, which can lead to increased downtime and maintenance costs. During assembly, undesirable loads, such as torques, act on the components. This is particularly challenging with bolted connections. Furthermore, the alignment and interlocking of various components within the gear assembly can be challenging, potentially leading to suboptimal performance and mechanical failures, e.g.,Due to high water pressure and pressure drops, precise alignment and secure engagement of the rotating and stationary parts are crucial to ensure uniform and effective cleaning.

[0004] Despite significant advances in tank cleaning technology, further improvements are needed to address these challenges. Existing systems cannot provide the required resistance to pressure drops within the rotating body. Furthermore, the complexity of current designs can lead to increased operating costs and reduced efficiency, highlighting the need for a more robust and user-friendly solution.

[0005] It is therefore one of the problems underlying the present invention to provide a tank cleaner that at least partially overcomes the disadvantages of known systems.

[0006] The aim of this invention is to provide a tank cleaner that overcomes one or more of the disadvantages of known systems.

[0007] According to a first aspect of the invention, these objectives are achieved by a tank cleaner according to claim 1.

[0008] The tank cleaner comprises a stationary body designed to connect to a supply line for receiving a cleaning fluid, ensuring a consistent and controlled flow of the cleaning medium. The rotating body, mounted on the stationary body, spins about a main axis of rotation and is driven by a gearbox assembly, at least partially enclosed within the stationary body. This gearbox assembly includes a main input shaft and a main output shaft, both extending along the main axis of rotation. The main output shaft drives the rotating body, providing smooth and powerful rotation essential for effective cleaning. A nozzle carrier mounted on the rotating body spins about a secondary axis of rotation, distinct from the main axis.This nozzle carrier includes a secondary output shaft driven by the main output shaft and is equipped with at least one nozzle for dispensing the cleaning fluid. The differentiation between the main and secondary rotational axes allows for more comprehensive coverage of the tank's interior surfaces, thus solving the problem of reaching all areas within the tank.

[0009] The invention solves the aforementioned problem by proposing that the main output shaft has a distal end extending along the main axis of rotation beyond the secondary output shaft. This specific arrangement can help to better withstand water droplets within the rotating body by reducing internal torsional forces and promoting force distribution along the main output shaft, which is longer than output shafts according to the prior art. Furthermore, the design freedom with regard to possible coupling mechanisms is increased by proposing that the main output shaft extends beyond the secondary output shaft. The technical configuration of the gearbox assembly and the relative positioning of the shafts can result in more efficient transmission of rotational force, reduced torsional forces, and an improvement in the overall performance and reliability of the tank cleaner.

[0010] Further embodiments of the invention are specified in the dependent claims, which further develop the concept of the invention with regard to advantageous features in connection with the subject matter of the invention and with regard to further advantages.

[0011] According to a second aspect, which also represents a preferred embodiment of the first aspect, the aforementioned problem is solved by a tank cleaner according to claim 2. The invention solves the aforementioned problem according to the second aspect in that the main output shaft, in particular the distal end of the main output shaft, is in a positive engagement with the rotating body. This ensures a reliable and precise transmission of the rotary motion from the gear assembly to the rotating body. The positive engagement means that the distal end of the main output shaft is designed to lock or engage with a corresponding structure on the rotating body, thereby preventing relative movement between these components during operation.This engagement can be achieved through various mechanical configurations such as keyways, wedges, or other interlocking geometries that ensure a positive-locking connection. Introducing this feature offers several advantages for the tank cleaner. First, it improves the structural integrity and reliability of the rotary drive mechanism, ensuring that the rotating body is driven consistently and precisely by the main output shaft. This is particularly important for maintaining the efficiency and effectiveness of the cleaning process, as any slippage or misalignment can lead to suboptimal cleaning performance. Second, the positive-locking engagement reduces component wear because it minimizes relative movement, which can lead to abrasion and wear over time.This contributes to the longevity and durability of the tank cleaner and reduces maintenance and downtime. Furthermore, state-of-the-art tank cleaners secure the upper static body to the lower rotating body with a threaded connection and then secure the tank cleaner using a secondary method. Thus, assembly is simplified by the proposed positive-locking engagement, as this provides a simple and reliable way to connect the main output shaft to the rotating body. A positive-locking engagement replaces the threaded connection and preferably also the secondary method. In particular, the secondary method can also be implemented using a positive-locking connection. Therefore, a positive-locking engagement allows the output shaft to be coupled to the rotating body without applying any torque to the components during assembly. This is a significant advantage compared to a threaded connection.Furthermore, a positive-locking connection allows for a reduction in assembly time compared to a threaded connection. In addition, the precise alignment ensured by a positive-locking connection can improve the overall balance and stability of the rotating body and reduce vibrations and noise during operation. This not only improves the user experience but also minimizes the risk of damage to the tank or the cleaner itself.

[0012] According to a further embodiment, the main output shaft engages, in particular in a positive-locking engagement, with the auxiliary output shaft. This engagement mechanism is made possible by the main output shaft projecting beyond the auxiliary output shaft and results in a direct and precise interaction between the main output shaft and the auxiliary output shaft, thereby ensuring a reliable transmission of the rotary motion from the main axis of rotation to the auxiliary axis. A positive-locking engagement means that the components are designed to interlock in a specific way, potentially through complementary shapes such as keyways, gears, or other interlocking structures, thereby preventing slippage and ensuring synchronized movement.This precise engagement mechanism improves the operating efficiency of the tank cleaner by maintaining a smooth and controlled rotation of the nozzle holder, which is crucial for effective cleaning. A positive-locking engagement also implies a robust mechanical connection that withstands the operational loads and forces occurring during the cleaning process, thus improving the durability and longevity of the unit. Furthermore, this engagement mechanism facilitates the precise alignment of the secondary output shaft with the main output shaft and ensures that the nozzle holder rotates smoothly and evenly around the secondary axis. This uniform rotation is essential for the even distribution of the cleaning fluid dispensed through the nozzles, thereby optimizing cleaning performance.Furthermore, the positive locking mechanism simplifies the assembly and maintenance of the tank cleaner, as the interlocking components can be easily aligned and secured.

[0013] According to another embodiment, the auxiliary output shaft engages with the nozzle carrier and a gear body of the transmission assembly. The engagement mechanism between the auxiliary output shaft and the nozzle carrier typically includes a mechanical coupling, such as a splined connection or keyways, which ensures that the rotary motion is effectively transmitted without slippage. This engagement enables direct torque transmission from the gear body of the transmission assembly to the nozzle carrier via the auxiliary output shaft, which connects the two. The gear body is mounted on the rotating body and engages with the main output shaft to convert the torque of the main output shaft into rotation of the auxiliary output shaft.This conversion mechanism is essential for the proper functioning of the tank cleaner, as it ensures that the rotary motion generated by the main output shaft is effectively transferred to the secondary output shaft, thereby driving the nozzle carrier. Furthermore, this engagement eliminates the need for additional bearings and complex coupling mechanisms. The new features introduced by this design offer several advantages for the tank cleaner. First, the engagement of the secondary output shaft with both the nozzle carrier and the gearbox body ensures a direct and efficient transmission of the rotary motion, reducing potential losses and improving the overall performance of the cleaning process.Secondly, mounting the gearbox body to the rotating body ensures that the gearbox assembly remains stable and aligned, thereby reducing component wear and extending the service life of the tank cleaner. Finally, converting the torque from the main output shaft to the auxiliary output shaft via the gearbox body allows for precise control of speeds and torques, enabling the nozzle holder to operate effectively under various cleaning conditions. These features improve the overall functionality, reliability, and efficiency of the tank cleaner, making it a more effective tool for tank cleaning. The auxiliary output shaft preferably extends the entire length of the nozzle holder.

[0014] According to another embodiment, the auxiliary output shaft is mounted on the rotating body by direct engagement with both the nozzle carrier and the gearbox housing. This direct engagement means that the auxiliary output shaft is mechanically connected to the nozzle carrier and the gearbox housing without intermediate components, thereby reducing mechanical complexity and potential sources of failure.

[0015] According to another embodiment, the rotating body has a support structure to hold the main output shaft in a locking position. This support structure serves as a crucial intermediate component, ensuring that the main output shaft remains securely in place during assembly and operation of the tank cleaner. The presence of this support structure reduces the risk of misalignment or displacement of the main output shaft, which could otherwise lead to operational efficiency losses or mechanical failures. Furthermore, the main output shaft is positively locked in the locking position by a locking element. This positive locking mechanism involves a precise interlocking of the components, ensuring that the main output shaft is securely locked in the intended position without any possibility of unintentional movement.The locking element is specifically designed to engage with the main output shaft in a way that prevents axial or rotational displacement, thereby maintaining the correct alignment and orientation of the shaft relative to the main axis of rotation. This positive locking mechanism provides added safety and stability, ensuring that the main output shaft remains in the optimal position for driving the rotating body and nozzle carrier. Furthermore, these features facilitate the maintenance and servicing of the tank cleaner, as the secure locking of the main output shaft simplifies disassembly and assembly processes.

[0016] According to another embodiment, the auxiliary output shaft extends through the support structure. This secures the auxiliary output shaft and ensures its correct alignment within the overall tank cleaner assembly. The extension through the support structure provides the auxiliary output shaft with additional stability and support, which is crucial for maintaining the precise rotary motion required for effective cleaning. This structural integration helps minimize wobbling or misalignment that could otherwise occur during tank cleaner operation, thus improving the reliability and efficiency of the cleaning process.Furthermore, extending the secondary output shaft through the support structure allows for a more robust connection between the rotating body and the nozzle holder, ensuring a smooth and uniform transfer of rotational force from the main output shaft to the secondary output shaft. The support structure itself acts as a stabilizing element, providing a firm support for the secondary output shaft and helping to distribute the mechanical loads generated during operation. Additionally, integrating the secondary output shaft into the support structure simplifies the assembly and maintenance of the tank cleaner by providing a clear and straight path for the secondary output shaft, thus reducing the complexity of the internal configuration.

[0017] According to a further embodiment, the support structure comprises at least one guide opening designed to guide the auxiliary output shaft through it. This ensures precise alignment of the auxiliary output shaft and maintains it within its intended path of rotation around the auxiliary axis. The guide opening acts as a conduit through which the auxiliary output shaft extends, providing controlled and stable support for its movement. By guiding the auxiliary output shaft through the guide opening, the support structure effectively minimizes any lateral or axial deviations that might occur during rotation, thereby improving the accuracy and consistency of the nozzle holder's rotational movement. This precise guidance mechanism is crucial for the optimal performance of the nozzle holder responsible for dispensing the cleaning fluid.

[0018] According to another embodiment, the main output shaft has a guide recess that corresponds to the guide passage opening and is configured to guide the secondary output shaft through it. The guide recess acts as a channel or path that facilitates the movement and alignment of the secondary output shaft as it passes through the main output shaft. This configuration ensures that the secondary output shaft is precisely guided and held in its intended position relative to the main output shaft, thereby improving the stability and accuracy of the nozzle carrier's rotational movement. The introduction of the guide recess and the corresponding guide passage opening offers several advantages for the tank cleaner.First, it improves the mechanical integrity and alignment of the rotating components, thus reducing the likelihood of misalignment or mechanical failure during operation. Second, the guide recess and guide through-hole enable smoother and better-controlled rotational movement of the nozzle carrier. Furthermore, the inclusion of the guide recess and guide through-hole can contribute to the durability and longevity of the tank cleaner by minimizing wear on the rotating components. By providing a guided path for the auxiliary output shaft, the system can reduce friction and mechanical stress on the shaft and associated components, thereby extending their service life.This can lead to lower maintenance requirements and reduced downtime for the tank cleaner, further improving its cost-efficiency and reliability in industrial cleaning applications.

[0019] According to a further embodiment, the support structure has at least one locking through-opening configured to receive the locking element in the locked position. The locking through-opening is designed to accommodate the locking element, ensuring that when in the locked position, the locking element effectively secures the rotating body and the nozzle carrier, preventing unintentional movement or disassembly. This configuration is particularly advantageous for maintaining the precise alignment and rotational integrity of the nozzle carrier and the rotating body, which are crucial for efficient and thorough tank cleaning.By integrating this locking mechanism, the tank cleaner ensures that the gearbox assembly and rotating components remain firmly in place, even under the high pressure conditions typically encountered during cleaning operations. This added stability not only improves the reliability and durability of the tank cleaner but also enhances operational safety by reducing the risk of mechanical failure or accidental disassembly. Furthermore, the locking through-hole provides a simple and effective means of maintenance and assembly, allowing for quick and secure locking and unlocking of the components. This feature simplifies tank cleaner maintenance, facilitating routine servicing or part replacement without compromising the overall integrity of the unit.

[0020] According to another embodiment, the main output shaft has a locking recess that corresponds to the locking through-hole and is configured to receive the locking element in the locked position. The locking recess on the main output shaft is precisely aligned with the locking through-hole, ensuring that the locking element is securely secured and held in the locked position. This configuration provides a more reliable and robust connection between the rotating body and the static body, preventing unintentional disassembly or misalignment during operation. When the locking element engages in the locking recess, it effectively fixes the main output shaft relative to the static body, thus maintaining the desired alignment and rotational dynamics of the rotating body and the nozzle carrier.This feature is particularly advantageous in high-pressure cleaning applications, where the stability and precision of the rotating components are crucial for optimal cleaning performance. By integrating a locking recess on the main output shaft, the design ensures that the rotational forces and vibrations generated during the cleaning process do not compromise the structural integrity of the tank cleaner. Furthermore, this locking mechanism simplifies the assembly and maintenance of the tank cleaner, as it provides a simple and secure method for aligning and securing the main output shaft within the stationary body.Furthermore, the locking recess and the corresponding locking through-hole are designed to accommodate various types of locking elements such as pins, bolts or other fasteners, providing flexibility in the selection of locking mechanisms according to specific application requirements.

[0021] According to another embodiment, the tank cleaner, particularly the orbital cleaner, includes a fastening element designed to secure the locking element in the locked position. The fastening element acts as a safety component, ensuring that the locking element remains in a fixed position when engaged, thus preventing unintentional movement or release during the cleaning process. By integrating a fastening element, the tank cleaner benefits from an additional layer of safety, which is essential for operation in environments where vibrations or flow forces could potentially cause components to shift. The fastening element can be configured in various forms, such as a ring, strap, clamp, bolt, or latch, each providing a robust solution for effectively securing the locking element.This feature not only improves the mechanical integrity of the tank cleaner, but also contributes to its operational safety.

[0022] Furthermore, this feature simplifies maintenance and inspection procedures, as operators can easily check the locking position of the components to ensure that the cleaner is always in optimal operating condition.

[0023] According to another embodiment, the main output shaft is aligned in the locked position by the locking element, allowing the nozzle holder shaft to be guided through the guide opening. This alignment mechanism provides a precise and reliable means of ensuring that the main output shaft and the nozzle holder shaft are correctly positioned relative to each other, thus facilitating the smooth operation of the nozzle holder. The locking element acts as a critical intermediary, ensuring that the main output shaft is held in the correct orientation and preventing misalignment that could disrupt the rotational dynamics of the nozzle holder. The guide opening acts as a conduit through which the nozzle holder shaft can be precisely positioned, further contributing to the overall precision of the tank cleaner.This arrangement not only simplifies the assembly and maintenance of the tank cleaner, but also increases its operational safety by reducing the likelihood of mechanical failures due to misalignment.

[0024] According to another embodiment, the guide opening and the locking opening are aligned parallel and spaced apart along the main axis of rotation. This feature also simplifies assembly and maintenance processes, as the parallel and spaced arrangement of the openings provides clear reference points for installing and aligning the components. Furthermore, accessibility is improved by arranging the guide opening and the locking opening parallel and spaced apart so that they do not interfere with each other.

[0025] According to another embodiment, the locking recess and / or the guide recess are provided at the distal end of the main output shaft. These recesses serve as precise engagement points, ensuring a secure and stable connection with the corresponding components and thus preventing unintentional disassembly or misalignment during operation. Furthermore, the placement of the locking recess and / or the guide recess at the distal end of the main output shaft helps to better withstand pressure drops during operation due to improved force transmission. The presence of these recesses at the distal end of the main output shaft also facilitates the assembly and maintenance of the tank cleaner, as they provide clear reference points for the alignment and positioning of the components.

[0026] The invention achieves the aforementioned objective in a third aspect by means of a gear assembly according to claim 15. The gear assembly is specifically designed for the tank cleaner, in particular for a tank cleaner according to the first or second aspect, and comprises a main input shaft, which serves in particular as the primary conduit for transmitting mechanical energy from a supply line to the internal components of the cleaner. The main output shaft extends in the direction of the main axis of rotation and ensures that the rotational energy is effectively transferred to the rotating body, enabling it to rotate about the main axis of rotation. Additionally, the main output shaft is configured to drive a secondary output shaft, which extends in the direction of a secondary axis of rotation. This secondary axis of rotation differs from the main axis of rotation and introduces a secondary rotary motion, which improves the cleaning range and effectiveness of the tank cleaner.The secondary output shaft is responsible for driving the nozzle carrier, which houses at least one nozzle for dispensing the cleaning fluid. This two-axis rotary mechanism ensures that the cleaning fluid is dispensed comprehensively and in a controlled manner, reaching all areas within the tank. Furthermore, the main output shaft has a distal end that extends beyond the secondary output shaft along the main axis of rotation, or the main output shaft, particularly its distal end, engages positively with the rotating body. By incorporating these features, the gear assembly utilizes the advantages described in relation to the first and second aspects of the invention. Thus, the advantages and preferred embodiments of the first and second aspects of the invention are simultaneously advantages and preferred embodiments of the third aspect of the invention.

[0027] The invention solves the aforementioned problem in a fourth aspect by a method for assembling a tank cleaner according to claim 16. The method for assembling a tank cleaner begins with coupling a static body to a supply line for receiving a cleaning fluid, thereby establishing a fundamental connection that ensures a continuous and controlled flow of cleaning fluid into the system. Subsequently, a rotating body is mounted on the static body, enabling it to rotate about a main axis of rotation. This rotatability is crucial for the dynamic operation of the tank cleaner, as it allows different areas within the tank to be reached. A nozzle holder is then mounted on the rotating body, which can rotate about a secondary axis of rotation that differs from the main axis.This rotation about two axes improves the cleaning range and flexibility of the tank cleaner, allowing it to target specific areas more effectively. The nozzle carrier is equipped with a secondary output shaft that extends through the rotating body in the direction of the secondary axis of rotation, enabling the precise dispensing of cleaning fluid through the nozzles. The gearbox assembly, in turn, is arranged such that its main output shaft extends from the stationary body into the rotating body in the direction of the main axis of rotation. This configuration ensures that the rotating body is driven about the main axis of rotation and that the mechanical power required for its operation is provided. Additionally, according to a first preferred embodiment, the main output shaft has a distal end that extends along the main axis of rotation within the rotating body beyond the secondary output shaft.Alternatively or additionally, the main output shaft, in particular its distal end, engages in a positive-locking manner with the rotating body. By incorporating these features, the method utilizes the advantages described in relation to the first aspect of the invention. Thus, the advantages and preferred embodiments of the first and second aspects of the invention are simultaneously advantages and preferred embodiments of the fourth aspect of the invention.

[0028] According to another embodiment of the method, the main output shaft, including its distal end, is brought into a positive engagement with the rotating body, thereby ensuring a secure and precise connection that enables effective transmission of the rotational force. This engagement mechanism is crucial for maintaining the alignment and stability of the rotating body during operation.

[0029] According to a further embodiment of the method, the main output shaft is engaged with the secondary output shaft, in particular in a positive-locking engagement. This is essential for the coordinated rotation of the nozzle carrier about its secondary axis of rotation. This engagement ensures that the rotational motion from the main output shaft is precisely transferred to the secondary output shaft, enabling the nozzle carrier to effectively dispense the cleaning fluid.

[0030] According to a further embodiment of the method, the main output shaft is held in a locking position by a support structure of the rotating body and positively locked in this position by a locking element. This locking mechanism provides additional stability and prevents unintentional movement or slippage of the main output shaft during operation, thereby increasing the reliability of the tank cleaner.

[0031] According to a further embodiment of the method, the auxiliary output shaft is guided through at least one guide opening in the support structure. This ensures that the auxiliary output shaft remains correctly aligned and can rotate smoothly. This guidance mechanism is preferably supplemented by guiding the auxiliary output shaft through a guide recess that corresponds to the guide opening of the main output shaft. This further ensures precise alignment and smooth operation.

[0032] According to a further embodiment of the method, the auxiliary output shaft is guided through at least one locking through-opening in the support structure and through a locking recess corresponding to the locking through-opening of the main output shaft. These guide mechanisms together ensure that the auxiliary output shaft is securely positioned and can rotate freely.

[0033] Finally, the locking element is preferably fixed in the locked position by a fastening element, which provides an additional level of safety and ensures that the locking mechanism remains engaged during operation of the tank cleaner. These features together improve the structural integrity, operational reliability, and overall performance of the tank cleaner, making it more effective in its intended application of tank cleaning.

[0034] The present disclosure will be further explained by means of examples with reference to the drawings in which: Fig. 1a: shows an embodiment of a tank cleaner comprising a static body, a rotating body, a nozzle carrier and nozzles; Fig. 1b: shows a cross-section of the tank cleaner illustrating the internal components including the supply line, gearbox assembly, main input shaft, main output shaft, auxiliary output shaft and locking position; Fig. 2: A first perspective exploded view of a tank cleaner with various components shows, including a static body, a rotating body, a gear assembly, a nozzle carrier and associated shafts and elements; Fig. 3: A second perspective exploded view of an embodiment of a tank cleaner shows the static body, the rotating body, the gear assembly, the nozzle carrier, and various shafts and components; and Fig. Figure 4 shows a flowchart illustrating a procedure for assembling a tank cleaner.

[0035] Fig. Figure 1a illustrates a tank cleaner 1, in particular an orbital cleaner 2, designed for cleaning a tank.

[0036] The tank cleaner 1 comprises a static body 3, a rotating body 4, and a nozzle holder 8. The static body 3 includes a housing 30 with an upper housing part 31 and a lower housing part 32. The upper housing part 31 is designed for connection to a supply line 6 for receiving cleaning fluid. The upper housing part 31 facilitates the connection to the supply line 6 and ensures that the cleaning fluid is directed into the housing 30 for subsequent use in the cleaning process.

[0037] The rotating body 4 is mounted on the static body 3 and rotates about a main axis of rotation R1. The rotating body 4 is driven by a gear arrangement 10 (see Fig. 1b) and a drive arrangement 7 (see Fig. 1b) driven about the main axis of rotation R1. This rotational capability enables the rotating body 4 to perform cleaning operations within the tank by distributing the cleaning fluid in a controlled manner. The rotating body 4, which is mounted on the stationary body 3, rotates about the main axis of rotation R1, with the nozzle carrier 8 being rotated by the rotating body 4 about a secondary axis of rotation R2.

[0038] The drive arrangement 7 comprises a stator 71 and an impeller 72, which are housed in a casing part 94.

[0039] The gearbox assembly 10, partially housed within the static body 3, comprises a main input shaft 120 and a main output shaft 130, both extending along the main axis of rotation R1. The main output shaft 130 drives the rotating body 4 about the main axis of rotation R1.

[0040] The nozzle carrier 8, which rotates about a secondary axis of rotation R2, is mounted on the rotating body 4. The nozzle carrier 8 includes a secondary output shaft 81, which extends along the secondary axis of rotation R2 and is driven by the main output shaft 130. The nozzle carrier 8 is equipped with at least one nozzle 82 for dispensing the cleaning fluid. The secondary axis of rotation R2 differs from the main axis of rotation R1.

[0041] Fig. Figure 1b shows a cross-section through the tank cleaner 1, detailing the internal components and their arrangement. The static body 3 is connected to the supply line 6, which directs the cleaning fluid into the static body 3.

[0042] The drive assembly 7 is connected to the main input shaft 120 and is responsible for driving the main input shaft 120 with the force provided by the cleaning fluid. This coupling enables the cleaning fluid to drive the gear assembly 10, which in turn drives the rotating body 4.

[0043] The transmission assembly 10, located within the static body 3, comprises the main input shaft 120 and the main output shaft 130. The main output shaft 130 extends beyond the secondary output shaft 81 along the main axis of rotation R1, as indicated by the distal end 132.

[0044] The rotating body 4 is mounted on the stationary body and is driven by the main output shaft 130. The nozzle carrier 8, mounted on the rotating body 4, rotates about the secondary axis of rotation R2. The gear assembly 10 comprises a gear unit 160, which is mounted on the rotating body 4 and engages with the main output shaft 130. The gear unit 160 is preferably supported on the main output shaft 130 by a bearing of the main drive shaft 98. This engagement converts the torque of the main output shaft 130 into the rotation of the secondary output shaft 81. The secondary output shaft 81 is supported on the rotating body 4 by direct engagement with both the nozzle carrier 8 and the gear unit 160.

[0045] The secondary output shaft 81, which extends through the rotating body 4, is driven by the main output shaft 130. The nozzle carrier 8 is equipped with several nozzles 82 that dispense the cleaning fluid during operation.

[0046] The cut in Fig. Figure 1b clearly shows the alignment and interaction of the various components that ensure the efficient operation of the tank cleaner 1.

[0047] Fig. 2 and Fig. 3 show the tank cleaner 1 according to Fig. 1a and Fig. 1b from two different perspectives. The tank cleaner 1 comprises several key components, each of which is essential for its operation.

[0048] The static body 3 is configured to be coupled to the supply line 6 to receive a cleaning fluid. The static body 3 houses the gear assembly 10, which comprises the main input shaft 120 and the main output shaft 130, as described above. The main output shaft 130 extends in the direction of the main axis of rotation R1 and is designed to drive the rotating body 4 about this main axis of rotation R1.

[0049] The gear assembly 10 is at least partially arranged within the static body 3 and comprises the gear body 160, which is mounted on the rotating body 4. The gear body 160 engages with the main output shaft 130 and converts the torque of the main output shaft 130 into a rotation of the auxiliary output shaft 81, as described in relation to Fig. 1a and Fig. 1b described. The auxiliary output shaft 81 is supported on the rotating body 4 by direct engagement with the nozzle holder 8 and the gear body 160 and thus extends completely through the nozzle holder 8 and the rotating body 4.

[0050] The transmission carrier 8 has a fastening element 83 which is configured to engage with a first distal end 81a of the auxiliary output shaft 81 in order to secure the auxiliary output shaft 81 in the Fig. The gear body 160 is to be fastened in the assembled state shown in Figure 1b. The gear body 160 engages with a second distal end 81b of the auxiliary output shaft 81. The auxiliary output shaft 81 is preferably further supported by a first bearing of the auxiliary output shaft 84 and by a second bearing of the auxiliary output shaft 85, both of which are connected to the rotating body 4, in particular to the support structure 41. Furthermore, a third bearing of the auxiliary output shaft 86 can be connected to the fastening element 83 to support the auxiliary output shaft 81 in its position, in which it extends through the nozzle carrier 8 and the rotating body 4. A first O-ring 86 at the first distal end 81a and a second O-ring 87 at the second distal end 81b can be provided to seal the passage through the nozzle carrier 8 and the rotating body 4 from the environment and thereby ensure safe and reliable operation of the tank cleaner 1.

[0051] The gear body 160 is mounted on the rotating body 4 and engages with the main output shaft 130. The gear assembly 10 has a stationary gear 135 mounted on the main output shaft 130. The gear body 160 has a bevel gear 161 that engages with the corresponding stationary gear 135 to convert the torque of the main output shaft 130 into rotation of the auxiliary output shaft 81.

[0052] The rotating body 4 includes a support structure 41 that holds the main output shaft 130 in a locking position PL (see Fig. 1b). The main output shaft 130 is positively locked in this position by a locking element 44.

[0053] The nozzle carrier 8 is mounted on the rotating body 4 and can rotate about the secondary axis of rotation R2, which differs from the main axis of rotation R1. The nozzle carrier 8 is equipped with at least one nozzle 82 and includes the secondary output shaft 81, which extends in the direction of the secondary axis of rotation R2 and is driven by the main output shaft 130 as described above.

[0054] The nozzle carrier 8 further comprises a support structure 41 with at least one guide opening 42, which is configured to guide the secondary output shaft 81 through it. The support structure 41 also has a locking opening 43, which is aligned parallel to and arranged in the direction of the main axis of rotation R1 at a distance from the guide opening 42. Both extend in the direction of the secondary axis of rotation R2.

[0055] The distal end 132 of the main output shaft 130, which extends beyond the secondary output shaft 81, includes a guide recess 133 and a locking recess 134. The guide recess 133 corresponds to the guide passage opening 42 and is configured to guide the secondary output shaft 81 through it. The locking passage opening 43 is configured to engage the locking element 44 in the locking position PL (see Fig. 1b) to accommodate. The guide recess 133 corresponds to a guide through-opening 42 in the support structure 41, which is designed to guide the auxiliary output shaft 81 through it. Similarly, the locking recess 134 corresponds to a locking through-opening 43 in the support structure 41, which is designed to accommodate the locking element in the locking position PL (see Fig. 1b).

[0056] The nozzle carrier 8 also includes additional components such as a fastening element 170, which is designed to secure the locking element 44 in the locking position PL (see Fig. 1b).

[0057] Fig. Figure 4 illustrates a method 1000 for mounting a tank cleaner, in particular a tank cleaner according to Fig. 1a to 3. In a first step 1100, the method comprises coupling a static body 3 with a supply line 6 for receiving a cleaning fluid, followed by mounting a rotating body 4 on the static body, which rotates about a main axis of rotation R1, in a second step 1200.

[0058] In a third step 1300, the method 1000 comprises mounting a nozzle carrier 8 rotatable about a secondary axis of rotation R2 on the rotating body 4, wherein the nozzle carrier 8 has a secondary output shaft 81 extending through the rotating body 4 in the direction of the secondary axis of rotation R2.

[0059] Finally, in a fourth step, the method 1000 comprises arranging a gear assembly 10 such that a main output shaft 130 of the gear assembly 10 extends from the static body 3 into the rotating body 4 in the direction of the main axis of rotation R1 in order to drive the rotating body 4 about the main axis of rotation R1, wherein the main output shaft 130 has a distal end 132 which extends along the main axis of rotation R1 inside the rotating body 4 beyond the secondary output shaft 81.

[0060] Furthermore, the method includes preferred steps 1500 to 2200, which can be performed additionally or alternatively. The order in which the steps are described is also not restrictive, but rather exemplary. Specifically: In a fifth step 1500, the method 1000 comprises the positive engagement of the main output shaft 130, in particular the distal end 132 of the main output shaft 130, with the rotating body 4.

[0061] A sixth step 1600 of the method 1000 comprises bringing into engagement 1600 of the main output shaft 130, in particular in a positive engagement with the secondary output shaft 81.

[0062] A seventh step 1700 of the method 1000 further comprises holding the main output shaft 130 in a locking position PL by a support structure 41 of the rotating body 4 and locking the main output shaft 130 positively in the locking position PL by a locking element 44.

[0063] In an eighth step 1800, the procedure 1000 comprises guiding the secondary output shaft 81 through at least one guide opening 42 of the support structure 41, followed by guiding the secondary output shaft 81 through a guide unit 133 corresponding to the guide opening 42 of the main output shaft 130 in a ninth step 1900.

[0064] A tenth step 2000 of the method 1000 further comprises guiding the secondary output shaft 81 through at least one locking passage opening 43 of the support structure 41, and an eleventh step 2100 comprises guiding the secondary output shaft 81 through a locking recess 134 which corresponds to the locking passage opening 43 of the main output shaft 130.

[0065] Finally, in a twelfth step 2200, the method 1000 comprises securing the locking element 44 in the locking position PL by means of a fastening element 170. Reference symbol list 1 Tank cleaner 2 orbital cleaners 3 static bodies 4 Rotating Bodies 41 Support structure 42 Guide passage opening 43 Locking passage opening 44 Locking element 6 Supply line 7 Drive arrangement 71 Stator 72 impellers 8 nozzle carriers 81 Secondary output shaft 82 nozzle 83 Fastening element 84 first bearing of the secondary output shaft 85 second bearing of the secondary output shaft 86 third bearing of the secondary output shaft 87 first O-ring 88 second O-ring 98 main output shaft bearings 10 Gearbox assembly 120 Main input shaft 130 Main output shaft 132 distal end 133 Management unit 134 Locking recess 135 fixed gear 160 Gearbox bodies 170 Fastening element R1 Main axis of rotation R2 secondary pivot axis PL locking position QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2019 005 830 A1

[0003]

Claims

Tank cleaner (1), in particular orbital cleaner (2), for cleaning a tank, comprising: - a stationary body (3) configured for connection to a supply line (6) for receiving a cleaning fluid, - a rotating body (4) rotatably mounted on the stationary body about a main axis of rotation (R1), - a gear assembly (10) arranged at least partially in the stationary body (3) with a main input shaft (120) and a main output shaft (130) extending in the direction of the main axis of rotation (R1) and configured for driving the rotating body (4) about the main axis of rotation (R1), - a nozzle carrier (8) mounted on the rotating body (4) rotatable about a secondary axis of rotation (R2), wherein the nozzle carrier (8) has a secondary output shaft (81) extending in the direction of the secondary axis of rotation (R2) and driven by the main output shaft (130), and at least one nozzle (82) for dispensing the cleaning fluid,wherein the secondary axis of rotation (R2) is different from the main axis of rotation (R1), characterized in that the main output shaft (130) has a distal end (132) which extends along the main axis of rotation (R1) beyond the secondary output shaft (81). Tank cleaner (1) according to claim 1 or the preamble of claim 1, wherein the main output shaft (130), in particular a distal end (132) of the main output shaft (130), is in positive engagement with the rotating body (4). Tank cleaner (1) according to claim 1 or 2, wherein the main output shaft (130) is in positive engagement with the secondary output shaft (81). Tank cleaner (1) according to one of the preceding claims, wherein the auxiliary output shaft (81) engages with the nozzle carrier (8) and a gear body (160) of the gear assembly (10), wherein the gear body (160) is mounted on the rotating body (4) and engages with the main output shaft (130) to convert the torque of the main output shaft (130) into a rotation of the auxiliary output shaft (81). Tank cleaner (1) according to claim 4, wherein the secondary output shaft (81) is mounted on the rotating body (4) by direct engagement with the nozzle carrier (8) and the gear body (160). Tank cleaner (1) according to one of the preceding claims, wherein the rotating body (4) has a support structure (41) for holding the main output shaft (130) in a locking position (PL) and the main output shaft (130) is positively locked in the locking position (PL) by a locking element (44). Tank cleaner (1) according to claim 6, wherein the secondary output shaft (81) extends through the support structure (41). Tank cleaner (1) according to claim 7, wherein the support structure (41) has at least one guide passage opening (42) which is configured to guide the secondary output shaft (81) through it. Tank cleaner (1) according to claim 8, wherein the main output shaft (130) has a guide recess (133) which corresponds to the guide passage opening (42) and is configured to guide the secondary output shaft (81) through it. Tank cleaner (1) according to claim 7, 8 or 9, wherein the support structure (41) has at least one locking passage opening (43) which is configured to receive the locking element (44) in the locking position (PL). Tank cleaner (1) according to claim 10, wherein the main output shaft (130) has a locking recess (134) which corresponds to the locking passage opening (43) and is configured to receive the locking element (44) in the locking position (PL). Tank cleaner (1) according to one of claims 6 to 11, further comprising: - a fastening element (170) which is arranged to fasten the locking element (44) in the locking position (PL). Tank cleaner (1) according to one of claims 9 to 12, wherein the main output shaft (130) is aligned by the locking element (44) in the locking position (PL) such that the nozzle holder shaft (8) can be passed through the guide passage opening (42). Tank cleaner (1) according to one of claims 9 to 13, wherein the guide passage opening (42) and the locking passage opening (43) are aligned parallel and arranged at a distance in the direction of the main axis of rotation. Tank cleaner (1) according to one of claims 9 to 14, wherein the locking recess (134) and / or the guide recess (133) are provided at the distal end (132) of the main output shaft (130). Gear assembly (10) for a tank cleaner, in particular for a tank cleaner (1) according to one of the preceding claims, comprising a main input shaft (120) and a main output shaft (130) extending in the direction of the main axis of rotation (R1) and configured to drive the rotating body (4) about the main axis of rotation (R1), wherein the main output shaft (130) is configured to drive a secondary output shaft (81) extending in the direction of a secondary axis of rotation (R2), wherein the secondary axis of rotation (R2) is different from the main axis of rotation (R1), characterized in that the main output shaft (130) has a distal end (132) extending along the main axis of rotation (R1) beyond the secondary output shaft (81), or that the main output shaft (130), in particular a distal end (132) of the main output shaft (130), is in positive engagement with the rotating body (4). Method (1000) for mounting a tank cleaner (1), in particular a tank cleaner according to any one of claims 1 to 15, comprising the following steps: - coupling (1100) a static body (3) with a supply line (6) for receiving a cleaning fluid, - mounting (1200) a rotating body (4) rotatably about a main axis of rotation (R1) on the static body (3), - mounting (1300) a nozzle carrier (8) rotatable about a secondary axis of rotation (R2) on the rotating body (4), wherein the nozzle carrier (8) has a secondary output shaft (81) extending through the rotating body (4) in the direction of the secondary axis of rotation (R2), - arranging (1400) a gear assembly (10) such that a main output shaft (130) of the gear assembly (10) extends from the static body (3) into the rotating body (4) in the direction of the main axis of rotation (R1) to drive the to drive rotating body (4) about the main axis of rotation (R1), wherein the main output shaft (130) has a distal end (132),wherein the distal end (132) extends along the main axis of rotation (R1) within the rotating body (4) beyond the secondary output shaft (81), or the main output shaft (130), in particular a distal end (132) of the main output shaft (130), is in positive engagement with the rotating body (4). The method (1000) according to claim 17, further comprising one, several, or all of the following steps: - bringing (1500) the main output shaft (130), in particular the distal end (132) of the main output shaft (130), into a positive engagement with the rotating body (4), - bringing (1600) the main output shaft (130) into engagement, in particular in a positive engagement with the secondary output shaft (81), - holding (1700) the main output shaft (130) in a locking position by a support structure (41) of the rotating body (4) and locking the main output shaft (130) positively in the locking position (PL) by a locking element (44), - guiding (1800) the secondary output shaft (81) through at least one guide opening (42) of the support structure (41), - guiding (1900) the secondary output shaft (81) guide recess (133) corresponding to one of the guide passage openings (42) of the main output shaft (130),- Guiding (2000) the auxiliary output shaft (81) through at least one locking through-opening (43) of the support structure (41), - Guiding (2100) the auxiliary output shaft (81) through a locking recess (134) corresponding to the locking through-opening (43) of the main output shaft (130), - Securing (2200) the locking element (44) in the locking position (PL) by a fastening element (170).

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