Method for assembling a mill wheel of a diaphragm wall mill

Abstract

This invention relates to a method for assembling a milling wheel at a milling wheel drive mechanism of a diaphragm wall milling machine, wherein the milling wheel drive mechanism and the milling wheel each have a fixing member for securing the milling wheel at the milling wheel drive mechanism, and wherein at least two spacer elements are arranged at the milling wheel drive mechanism. The method according to the invention includes the steps of: (i) guiding the milling wheel to the milling wheel drive mechanism; (ii) coarsely aligning the milling wheel relative to the milling wheel drive mechanism such that the fixing members of the milling wheel and the milling wheel drive mechanism are opposite each other, but in this case, do not contact each other; (iii) connecting each centering element to a spacer element; (iv) finely aligning the milling wheel relative to the spacer element by means of the centering element, wherein the fixing members still do not contact each other; and (v) moving the milling wheel relative to the spacer element by means of the centering element such that the fixing members engage with each other. Furthermore, this invention relates to an assembly for a diaphragm wall milling machine, and a diaphragm wall milling machine for performing the method according to the invention.

Description

Technical Field

[0001] The present invention relates to a method for mounting a milling wheel on a milling wheel drive mechanism of a diaphragm wall milling machine (Schlitzwandfräse), an assembly for performing the method by means of a centering element and a spacer element, and a diaphragm wall milling machine having at least one milling wheel drive mechanism and a milling wheel, which can be mounted on the milling wheel drive mechanism by means of the method according to the invention. Background Technology

[0002] Diaphragm wall milling machines are used to create trenches in order to construct trench walls, and they come in various implementation schemes and sizes. Typically, diaphragm wall milling machines are mounted on mobile load-bearing equipment, such as mobile cranes or cable-operated excavators.

[0003] The core component of this type of diaphragm wall milling machine is the milling wheel, which is supported in the lower region of the machine's housing on a rotatably driven milling wheel transmission mechanism. The milling wheel experiences high wear and therefore requires frequent replacement and / or maintenance. Due to the wheel's weight and limited access to fixed components, assembling and disassembling it on the milling wheel transmission mechanism is sometimes very difficult, yet requires high precision. For this reason, the process is very time-consuming and laborious.

[0004] To date, in existing diaphragm wall milling machines, the milling wheel is assembled without special auxiliary parts. Typically, the alignment of the milling wheel relative to the milling wheel drive mechanism is done manually. With the aid of tools (e.g., pry bars), the milling wheel is mostly operated until all connection points or fasteners at the milling wheel and milling wheel drive mechanism are aligned. The milling wheel is then pushed onto the milling wheel drive mechanism by a final bolt. Summary of the Invention

[0005] Therefore, the object of this invention is to simplify and accelerate the assembly and disassembly of the milling wheels of such a diaphragm wall milling machine. In particular, simple and precise alignment of the milling wheels should be achieved while protecting fragile components from damage.

[0006] Therefore, a method is proposed for assembling a milling wheel at the milling wheel drive mechanism of a diaphragm wall milling machine, wherein the milling wheel drive mechanism and the milling wheel each have a fastener for fixing the milling wheel at the milling wheel drive mechanism, and wherein at least two spacer elements are arranged at the milling wheel drive mechanism.

[0007] The method according to the present invention includes the following steps:

[0008] - For example, by using a lift to guide the milling wheel to the milling wheel drive mechanism.

[0009] - Roughly align the milling wheel with respect to the milling wheel drive mechanism, so that the milling wheel and the fixed parts of the milling wheel drive mechanism are opposite each other, but not in contact.

[0010] - Connect each centering element to a spacer element.

[0011] - The milling wheel is precisely aligned relative to the spacer element using a centering element, wherein the fixing element always remains in contact, and

[0012] - The milling wheel is moved relative to the spacer by means of a centering element, so that the fixed parts engage with each other.

[0013] Therefore, the idea according to the invention is to precisely align the milling wheel relative to the milling wheel drive mechanism by means of a specially designed centering element and ultimately push the milling wheel onto the milling wheel drive mechanism, which causes or realizes the establishment of a connection. The centering element works in conjunction with a spacer element at the milling wheel drive mechanism, the spacer element achieving precise alignment without contact with the fixing elements.

[0014] The spacer element acts primarily as a divider until the correct alignment of the milling wheel is found, and thus protects the fixing components from damage. Simultaneously, the spacer element forms a reference point for fine alignment of the milling wheel and an anchor point for pushing the milling wheel onto the milling wheel drive mechanism. Both movements are performed when using a centering element, thus giving the centering element a dual function. Here, fine alignment of the milling wheel is achieved, in particular, by rotating the milling wheel about its own central axis. Furthermore, as a third function, the centering element prevents the milling wheel from slipping off the milling wheel drive mechanism.

[0015] The fasteners can be pins / bolts and associated holes. Therefore, when it is said that the fasteners do not contact (e.g. during rough or fine alignment), it specifically means that there is a certain distance between the fasteners when viewed from the side, and, for example, the pin is not inserted into the hole.

[0016] During or before coarse alignment, the milling wheel may have already been pushed onto the milling wheel drive mechanism or its hub, so that the milling wheel rests against the milling wheel drive mechanism or its hub during fine alignment, and if necessary, during coarse alignment. Subsequently, coarse and / or fine alignment is performed by rotating the milling wheel. Therefore, when guiding the milling wheel, it can already be pushed onto the milling wheel drive mechanism, where coarse alignment is performed by subsequent rotation relative to the milling wheel drive mechanism to position the fixtures relative to each other. Since this step is performed especially without alignment aids, fine alignment is then required to ensure the fixtures are precisely aligned, or rather, aligned with each other. However, it is also conceivable that the milling wheel has already been rotated to the correct position during guidance, so that the milling wheel is pushed onto the drive mechanism hub simultaneously with the coarse alignment step.

[0017] In one feasible implementation, the spacer element and / or the fixing element arranged at the milling wheel drive mechanism extend vertically from the outer side of the milling wheel drive mechanism facing the milling wheel, and are preferably distributed on the periphery. The outer side of the milling wheel drive mechanism may be a drive mechanism cover. The drive mechanism cover may be removed or opened, but this is not mandatory.

[0018] In another feasible embodiment, the spacer element contacts the milling wheel earlier than the fixing element during movement or pushing, wherein the spacer element preferably has a longer length than the fixing element arranged at the milling wheel drive mechanism. Thus, the spacer element acts as a divider. It contacts the milling wheel first and further adjusts the milling wheel's fine alignment in conjunction with the centering element. Since the fixing element of the milling wheel drive mechanism does not engage (especially because it is shorter than the spacer element), the fixing element is protected from damage. Only when the milling wheel is fully and correctly positioned can it continue to be pushed onto the milling wheel drive mechanism, causing the milling wheel and the fixing element of the milling wheel drive mechanism to contact or engage with each other.

[0019] In another feasible embodiment, the fixing element arranged at the milling wheel drive mechanism is a bolt or pin, especially a threaded pin, and the fixing element arranged at the milling wheel is a hole, wherein the pin is pushed through the hole (“engaged”) when the milling wheel moves relative to the spacer element, specifically when the milling wheel is pushed onto the milling wheel drive mechanism at the end of the assembly process. Preferably, the pin fully pushed into or through the hole is locked by means of a locking element, especially a nut. Thus, the milling wheel is securely fixed at the milling wheel drive mechanism and the assembly process is completed.

[0020] In another feasible embodiment, the centering element is connected to the spacer element from the side of the milling wheel opposite to the milling wheel drive mechanism. Here, the connection between the centering element and the spacer element can be achieved directly, or indirectly, for example, through a connecting element. Preferably, a gap is provided through which the centering element can connect to the spacer element. The connection between the centering element and the spacer element (or through a connecting element) is achieved, in particular, by bolting. For this purpose, the centering element and / or the spacer element may have corresponding threaded holes and / or threaded elements.

[0021] After the milling wheel is assembled, the centering element is preferably removed from the spacer element. However, it is also conceivable that the centering element remains at the spacer element or is supported by a special retainer on the diaphragm wall milling machine. The centering element is particularly portable.

[0022] In another feasible implementation, a recess is constructed on the fixed flange of the milling wheel for each spacer element. The fixed flange may be annularly constructed on or in the center of the milling wheel hub and extend perpendicularly to the end side or outer side of the milling wheel drive mechanism. As the milling wheel moves relative to the spacer element, the spacer element enters the recess. Previously, the spacer element and the recess have been aligned with each other in a mutually aligned manner through fine alignment.

[0023] Preferably, after the milling wheel assembly is completed, the spacer element remains at the milling wheel drive mechanism. The spacer element, like the fixing element, is locked by means of a locking element, specifically a nut. It can also be proposed that, after assembly is completed, a cover element is installed at the spacer element, for example, to seal the threaded hole of the spacer element and thereby protect the threaded hole from dirt or debris seeping in.

[0024] In another feasible embodiment, the centering element is connected to the spacer element through a recess, wherein the centering element is moved for fine alignment and / or to move the milling wheel in the direction of the milling wheel drive mechanism. Preferably, the centering element and the spacer element are connected to each other by a threaded pin extending through the recess. Subsequently, the centering element is screwed onto the threaded pin, preferably the threaded pin being non-rotatably connected to the spacer element, particularly screwed into the spacer element.

[0025] By continuing to screw the centering element onto the threaded pin, the centering element is moved toward the spacer element or the milling wheel drive mechanism. At this point, starting from a certain distance, fine alignment of the milling wheel is first performed, caused by the interaction with or contact with the milling wheel (especially at the edge of the clearance). Preferably, after fine alignment, by continuing to screw the centering element onto the threaded pin, the milling wheel is moved relative to the spacer element; this movement corresponds particularly to pushing the milling wheel further into the milling wheel drive mechanism or the hub of the drive mechanism. Here, in the simplest case, the centering element presses against the milling wheel, thereby pushing the milling wheel toward the milling wheel drive mechanism.

[0026] In another feasible implementation, the centering element is specified to have a tapered section, which preferably works in conjunction with the corresponding clearance when the centering element moves toward the spacer element or the milling wheel drive mechanism, and to precisely align the milling wheel in such a way that the spacer element is aligned with the associated clearance.

[0027] Here, the end of the tapered section facing the void (which can also be the end of the centering element) has an outer diameter smaller than the inner diameter of the void. Thus, this end of the tapered section enters the void during the movement of the centering element. Even if the centering element and the void are not perfectly aligned before fine alignment (especially when they are not collinear), the tapered shape facilitates this "penetration."

[0028] As the centering element continues to move toward the milling wheel drive mechanism, its inclined shape presses against the edge of the clearance, causing the milling wheel to rotate about its axis of rotation (this also achieves a simple movement of the axis of rotation) and automatically achieving precise or collinear alignment of the centering element, and consequently, alignment of the spacer element relative to the clearance. For optimal fine alignment, the tapered section may have a maximum diameter, which corresponds exactly to the inner diameter of the clearance (or slightly smaller than the inner diameter, so as not to obstruct the centering element or cause it to tilt).

[0029] In another feasible embodiment, the centering element has a first stop, preferably surrounding the tapered section, which abuts against the milling wheel after fine alignment. The first stop preferably abuts the end of the tapered section with the largest diameter. Fine alignment ends when the first stop touches the milling wheel, specifically the fixed flange. As the centering element continues to move toward the milling wheel drive (especially by continued turning), the stop also pushes the milling wheel toward the milling wheel drive, wherein the clearance moves relative to the associated spacer element, and the spacer element thereby enters the clearance. The first stop may be an area integral with the centering element, having a diameter larger than the inner diameter of the clearance.

[0030] Typically, the centering element may have a generally cylindrical shape, wherein one of the ends may be formed into a tapered shape, forming a tapered section for fine alignment. The centering element may have one or more handles or handle elements to facilitate turning. Similarly, a receiving portion for a tool may be provided, by means of which the centering element can be turned more easily. The centering element is particularly rotationally symmetric. However, preferably, the axial end regions of the centering element are different from each other.

[0031] In another feasible implementation, as the centering element continues to move towards the milling wheel drive mechanism, especially during turning, the first stop also pushes the milling wheel towards the milling wheel drive mechanism, causing the spacer element to enter the corresponding clearance. In this case, the optimal approach is to move the milling wheel simultaneously using all the centering elements; however, this requires multiple people. Alternatively, each centering element can be moved sequentially by only a short distance to avoid misalignment of the milling wheel, spacer element, and / or fixing member.

[0032] In another feasible embodiment, the centering element is connected to the spacer element by a threaded pin and can be moved toward the spacer element or the milling wheel drive mechanism by screwing, and has continuous threaded holes for receiving the threaded pin. Therefore, the centering element can preferably be screwed onto the threaded pin starting from both sides, wherein one of the ends has or forms a tapered section.

[0033] Preferably, the centering element has a second stop at its end opposite the tapered section. After the milling wheel is moved a first distance relative to the spacer element toward the milling wheel drive mechanism by means of the centering element, the centering element is unscrewed from the threaded pin, flipped over, and screwed back onto the threaded pin using the other end until the second stop contacts the fixed flange on the milling wheel. Subsequently, as the centering element is continued to be screwed, the milling wheel continues to move toward the milling wheel drive mechanism.

[0034] Therefore, following the precise alignment, the first stop is used to move the milling wheel a first distance. Subsequently, after flipping the centering element, the milling wheel is pushed the remaining distance onto the milling wheel drive mechanism until the corresponding fasteners are fully engaged.

[0035] In another feasible embodiment, the centering element has a recess at its end away from the tapered section that leads to a threaded hole, wherein, after being re-screwed onto the threaded pin and after the milling wheel continues to move in the direction of the milling wheel drive mechanism, the spacer element enters the recess of the centering element until the milling wheel and the fixing member of the milling wheel drive mechanism are fully engaged with each other.

[0036] In another feasible embodiment, at least two pre-alignment elements are provided, arranged on the side of the milling wheel facing the milling wheel drive mechanism, and each has an inclined surface. Therefore, when being guided to the milling wheel drive mechanism, the milling wheel is first pushed into the milling wheel drive mechanism by the pre-alignment elements, and the inclined surfaces of the pre-alignment elements pre-align the milling wheel with respect to the milling wheel drive mechanism, so that the rotation axes of the milling wheel and the milling wheel drive mechanism are substantially collinear.

[0037] Subsequently, coarse alignment and fine alignment are performed by rotating the milling wheel relative to the milling wheel drive mechanism, respectively. However, at this time, the rotation axis of the milling wheel can also be slightly moved so that the rotation axis of the milling wheel is completely collinear with the rotation axis of the milling wheel drive mechanism, at least after fine alignment.

[0038] In essence, the pre-centering element extends the support surface of the milling wheel on the milling wheel drive mechanism or the hub of the drive mechanism. Therefore, during guidance, the milling wheel first contacts the milling wheel drive mechanism via the pre-centering element. The inclined surface facilitates pushing or "penetrating" and is responsible for automatic pre-centering. The pre-centering element can be constructed as an arc-shaped, fan-shaped centering block and can be fixed to the milling wheel, for example, by means of bolts. After assembly, the pre-centering element can be left on the milling wheel or subsequently removed again.

[0039] Preferably, three spacer elements and corresponding three centering elements are provided for each milling wheel. Preferably, three pre-centering elements are also provided.

[0040] Furthermore, the present invention relates to an assembly for a diaphragm wall milling machine for performing the method according to the invention. The assembly includes at least two centering elements and at least two spacer elements, preferably three centering elements and three spacer elements. Additionally, the assembly may have at least two, preferably three, threaded pins for connecting the centering elements to the spacer elements and / or at least two, preferably three, of the pre-centering elements described above. Here, the same advantages and features as the method according to the invention are obviously obtained, and therefore will not be repeated here.

[0041] In conventional diaphragm wall milling machines, this assembly can be used to assemble milling wheels. For example, the spacer element may have threads that can be screwed into existing holes in known milling wheel drives or drive cover parts. The clearance associated with the spacer element may be an existing hole for a retaining pin in the milling wheel drive. If a pre-alignment element is used in this type of milling wheel without its own hole for a pre-alignment element, the pre-alignment element described above can be inserted or otherwise reversibly connected to the milling wheel. The alignment element is particularly a separate component and conforms to the shape of the spacer element. In this case, the method can also be carried out in this type of diaphragm wall milling machine by means of the assembly according to the invention. Therefore, there is no need to modify the milling wheel and / or the milling wheel drive mechanism.

[0042] Furthermore, the present invention relates to a diaphragm wall milling machine having at least one milling wheel drive mechanism and a milling wheel that can be mounted on the milling wheel drive mechanism by means of the method according to the invention. Preferably, the diaphragm wall milling machine includes components according to the invention. Here, it is obvious that the same advantages and features as those of the method or components according to the invention are also obtained, and therefore will not be repeated here.

[0043] The diaphragm wall milling machine may have two or four milling wheels, all of which can be mounted on the corresponding milling wheel drive mechanism by means of the method according to the invention. Alignment elements and possibly threaded pins can be used for all four milling wheels, so that it is not necessary to prepare double or quadruple quantities. In particular, the milling wheels are installed sequentially in any case. However, spacer elements are preferably retained on the corresponding milling wheel drive mechanism, so that a corresponding number of spacer elements must be provided for each milling wheel. Attached Figure Description

[0044] Other features, details, and advantages of the invention will become apparent from the embodiments explained below with reference to the accompanying drawings. In the drawings:

[0045] Figure 1 The supporting equipment with a diaphragm wall milling machine is shown in a side view;

[0046] Figure 2A perspective view of an embodiment of a diaphragm wall milling machine according to the invention is shown in the region of the milling wheels, wherein one of the milling wheels is shown in an exploded view;

[0047] Figure 3 The centering element, spacer element, and threaded pin according to an embodiment of the invention are shown in lateral cross-sectional views.

[0048] Figures 4 to 9 Schematic cross-sectional views of different steps of the method according to the invention according to embodiments are shown, wherein, in Figure 3 The components shown in the figure; and

[0049] Figure 10 A perspective view of an embodiment of a diaphragm wall milling machine according to the invention is shown in the region of the milling wheel drive mechanism, wherein, with Figure 2 It shows more details than the previous version. Detailed Implementation

[0050] Figure 1 The side view shows the support device 1, which has a diaphragm wall milling machine 10 suspended on a cantilever. The diaphragm wall milling machine 10 includes a housing 16, on the lower end of which are a plurality of milling wheels 12, which are mounted on a rotatably driven milling wheel drive mechanism 14. Typically, there are a total of four milling wheels 12, although embodiments with two or more milling wheels 12 are also conceivable.

[0051] Figure 2 A portion of an embodiment of the diaphragm wall milling machine 10 according to the invention is shown in the region of the milling wheels 12, wherein only two milling wheels 12 are shown here. One of the two milling wheels 12 is shown in an exploded view. Thus, the milling wheel drive mechanism 14, which may also be referred to as a milling wheel hub or drive hub, can be seen, onto which the milling wheels can be pushed for assembly. On this end side, the milling wheel drive mechanism 14 has a drive mechanism cover 15, which has a plurality of fasteners 20 distributed around its periphery for fixing the milling wheels 12, the fasteners extending vertically from the drive mechanism cover 15.

[0052] The milling wheel 12 has a plurality of milling teeth 13 on its outer periphery and a surrounding retaining flange 18 inside. A plurality of holes 22 are provided in the retaining flange 18, which are constructed and arranged to mate with the retaining member 20 of the milling wheel drive mechanism 14, forming the retaining member 22 of the milling wheel 12. For assembly, the milling wheel 12 is pushed onto the milling wheel drive mechanism 14, and the retaining member 20 of the milling wheel drive mechanism 14 passes through the associated holes 22. The retaining member 20 is then locked by a locking element, specifically a nut 28, which is configured in particular as a threaded pin or a bolt with threaded sections on its end sides.

[0053] In addition to the fastener 20, three spacer elements 24 are arranged on the transmission mechanism cover 15. These spacer elements are screwed into corresponding holes 23 in the transmission mechanism cover 15 via threaded sections (see...). Figure 4 The portion of the spacer element 24 extending from the transmission mechanism cover 15 is bolt-shaped, specifically cylindrical, and forms a spacer bolt with a greater length than the fastener 20.

[0054] The spacer element 24 has a centrally threaded hole 27 at its end extending from the transmission mechanism cover 15 (see...). Figure 3 The threaded pin 26 is screwed into the threaded hole. The three holes in the hole of the fixing flange 18 of the milling wheel form a gap 25, through which the spacer element 24 passes when the milling wheel 12 is assembled.

[0055] In order to precisely align the milling wheel 12 before the fasteners 20 and 22 engage with each other, and in order to push the milling wheel 12 onto the milling wheel drive mechanism 14 in a controlled manner, three centering elements 30 are provided. The functions of these centering elements will be described below, and they form a component independent of the milling wheel 12 or the wall grooving machine 10.

[0056] Furthermore, the milling wheel 12 has three pre-aligning elements 40, bolted together and configured as centering blocks, on the side facing the milling wheel drive mechanism 14. The centering blocks 40 lie on their inner sides, pointing towards the rotation axis of the milling wheel 12, along the inner periphery of the milling wheel 12, thereby forming an extended support surface of the milling wheel 12 on the milling wheel drive mechanism 14. During assembly, this extended support surface is the first to contact the drive mechanism hub. The centering blocks 40 are inclined inwards towards the milling wheel drive mechanism 14, thus facilitating their insertion into the milling wheel drive mechanism 14. Furthermore, upon insertion, the centering blocks pre-align the milling wheel 12 relative to the milling wheel drive mechanism 14, ensuring that the inner diameter of the milling wheel 12 is aligned with the drive mechanism hub or the outer diameter of the milling wheel drive mechanism 14, specifically, that the corresponding rotation axes are substantially collinear.

[0057] Figure 3 An embodiment of the centering element 30, threaded pin 26, and spacer element 24 of the diaphragm wall milling machine 10 according to the present invention is shown, wherein a lateral cross-sectional view along its longitudinal axis is shown. The threaded sections of the three components are not shown precisely here.

[0058] The spacer element 24 has been described above. The threaded pin 26 has a greater length than the threaded hole 27 of the spacer element 24 and has a recess for a tool at the end opposite to the spacer element 24, through which the tool can be easily and securely screwed in.

[0059] The centering element 30 has a continuous threaded hole 36 extending along the longitudinal axis (or a hole 36 with internal threads at least at both end sections). Alternatively, two blind threaded holes may be provided starting from both ends.

[0060] The end of the centering element 30 facing the spacer element 24 is formed into a tapered shape and tapers towards the end. This tapered section 32 is used to precisely align the milling wheel 12 before final connection. A surrounding first stop 34 abuts the tapered section 32, and the stop surface of the stop is perpendicular to the longitudinal axis of the centering element 30. In this embodiment, the centering element 30, which may also be referred to as a centering cone, is integrally formed, but it may also be composed of multiple combined parts.

[0061] Next, according to Figures 4 to 9 An embodiment of the method according to the invention for mounting the milling wheel 12 onto the milling wheel drive mechanism 14 is described.

[0062] In the first step, the milling wheel 12 is roughly pre-positioned relative to the hub of the transmission mechanism or the milling wheel transmission mechanism 14. The inner diameter of the milling wheel 12 is aligned with the hub of the transmission mechanism 14 by the centering block 40 on the pressure side of the milling wheel. Thus, if the spacer element 24 is not already aligned with the clearance 25 in the flange ring 18, the milling wheel 12 can be pushed until the spacer element 24, located on the side of the milling wheel transmission mechanism 14, abuts against the fixed flange 18 of the milling wheel 12.

[0063] Because the spacer pin of the spacer element 24 (i.e., the portion extending from the transmission mechanism cover 15) is longer than the fixing element 20, the milling wheel 12 first contacts the spacer pin during insertion and cannot contact the fixing element 20. Thus, the spacer element 24 protects the fixing element 20 from damage. Optionally, the spacer element 24 may include a cushioning element and / or be made of an impact-resistant material.

[0064] In this state, coarse alignment of the milling wheel 12 in the rotational direction is performed. At this time, the spacer element 24 must be aligned with the recess 25 in the fixed flange 18 such that the threaded pin 26 can be inserted into the spacer element 24 to pull the milling wheel. In the screwed-in state, the threaded pin 26 extends through the recess 25 (see...). Figure 4 ).

[0065] If the above is completed, the centering element 30 is screwed onto the threaded pin 26 starting from the side away from the milling wheel drive mechanism 14. If the centering element is moved a certain distance by the screwing motion, the tapered section 32 contacts the edge of the clearance 25 and automatically causes the clearance 25 to be accurately aligned with the spacer element 24, thereby achieving fine alignment of the milling wheel 12 with respect to the milling wheel drive mechanism 14. This fine alignment may cause the milling wheel 12 to rotate relative to the milling wheel drive mechanism 14 (see...). Figure 5(See arrow b1) and / or move. After fine alignment, the fastener 20 is aligned with the subordinate hole 22.

[0066] Figure 5 This shows the situation after complete alignment directly with the milling wheel 12. At this point, the tapered section 32 extends fully into the recess 25, and the first stop 34 of the centering element 30 contacts the side of the fixed flange 18 facing away from the milling wheel drive mechanism 14. The spacer element 24 is still located outside the recess 25.

[0067] Now, the milling wheel 12 can be pushed into the milling wheel drive mechanism 14 by continuing to rotate the centering element 30, specifically by screwing it onto the threaded pin 26. Here, the centering element 30 pushes the fixed flange 18 through the first stop 34 and thereby towards the milling wheel drive mechanism 14 (see...). Figure 6 Arrow b1) pushes the entire milling wheel 12 until the top of the centering element 30 touches the end side of the spacer element 24 (see arrow b1). Figure 6 At this point, the spacer element 24 has not yet been fully pushed into the empty space 25.

[0068] Now, flip the centering element 30 over and rescrew it onto the threaded pin 26, starting from its other end. At the end opposite to the tapered section 32, the centering element 30 has a central recess 38, the inner diameter of which is larger than the outer diameter of the spacer element 24. A second stop 35 is formed on the end side of this end, circularly surrounding the recess 38.

[0069] Now, the centering element 30 is screwed onto the threaded pin 26 with the second stop 35 facing forward, until the second stop 35 contacts the retaining flange 18 (see...). Figure 7 This additional advantage is that the localized force locking between the milling wheel 12 and the milling wheel drive mechanism 14 eliminates the need for a locking mechanism, or a locking device on the diaphragm wall milling machine 10 itself. There is no risk of the diaphragm wall milling machine 10 shifting during the pushing process or the milling wheel 12 slipping off the milling wheel drive mechanism 14.

[0070] By continuing to flip or screw on, the centering element 30 continues to push the milling wheel 12 toward the milling wheel drive mechanism 14, and pushes the milling wheel 12 completely onto the milling wheel drive mechanism 14 until the fixed flange 18 touches the drive mechanism cover 15 (or has at least a minimum distance relative to the drive mechanism cover 15). At this time, the spacer element 24 enters the recess 38 of the centering element 30. Figure 8 The final position is shown in the diagram. By evenly screwing on all three centering elements 30, it is ensured that the element is pushed in without any misalignment. At this point, the spacer element 24 is fully inserted into the recess 25, and the retainer 20 is fully inserted into the subordinate hole 22.

[0071] Next, to secure the milling wheel 12 to the milling wheel drive mechanism 14, the nut 28 can be easily installed onto the retaining member 20 protruding through the hole 22 and tightened. Once this is complete, remove the centering element 30 and the associated threaded pin 26. The spacer element 24 remains in the milling wheel drive mechanism 14, wherein its threaded hole 27 is protected by a cover element 44 configured as a closed bolt, as in... Figure 9 As shown in the diagram. Similarly, the centering block 40 may remain on the milling wheel 12, but it may also be removed after assembly and used, for example, for assembling other milling wheels 12.

[0072] exist Figure 10 Another embodiment of the diaphragm wall milling machine 10 according to the invention is shown in the area of ​​the milling wheel drive mechanism 14 without the milling wheel 12, wherein further details are shown. That is, for example, a drive unit 17 can be seen, which drives the two milling wheel drive mechanisms 14 shown. Here, the drive unit is a hydraulic motor. Furthermore, on the drive mechanism cover 15, teeth 44 are provided in the area of ​​the paired fixing members 20, which work together with corresponding teeth on the milling wheel 12, specifically on the fixing flange 18, and are used for effective torque transmission from the milling wheel drive mechanism 14 to the milling wheel 12.

[0073] Furthermore, the spacer element 24 can be screwed into the hole 23 by using a sealing bolt, and the spacer element 24 can be removed from the milling wheel drive mechanism 14. Alternatively, the spacer element 24 can be fixedly arranged on the drive mechanism cover 15.

[0074] In principle, the centering element 30 can induce fine alignment and / or push-in of the milling wheel 12 by other types of movement (e.g., linear mounting onto the threaded pin 26 or spacer 24). However, advantageously, locking the milling wheel 12 to prevent slippage is achieved, requiring less force. Furthermore, this movement is better controlled, specifically distributed among the three centering elements 30.

[0075] List of reference numerals

[0076] 1. Supporting equipment

[0077] 10-site diaphragm wall milling machine

[0078] 12 milling wheels

[0079] 13 milled teeth

[0080] 14 Milling Wheel Drive Mechanism / Drive Mechanism Hub

[0081] 15. Transmission mechanism cover

[0082] 16-shell

[0083] 17 drive units

[0084] 18 fixed flanges

[0085] 20 Fasteners (Pin)

[0086] 22 Fasteners (holes)

[0087] 23 holes

[0088] 24 spacer elements (spacer bolts)

[0089] 25. Hole (or opening)

[0090] 26 threaded pin

[0091] 27 threaded hole

[0092] 28 Locking elements (nuts)

[0093] 30 centering elements (centering cones)

[0094] 32 conical sections

[0095] 34 First stop section

[0096] 35 Second stop section

[0097] 36 threaded hole

[0098] 38 concavity

[0099] 40 pre-alignment elements (alignment blocks)

[0100] 42 Cover element (sealing bolt)

[0101] 44 teeth

[0102] b1 direction of motion during fine alignment

[0103] The direction of movement of b2 when it is first pushed up by the centering element

[0104] The direction of movement of b3 when it is pushed up for the second time with the help of the centering element

Claims

1. A method for assembling a mill wheel (12) at a mill wheel drive (14) of a diaphragm wall mill (10), wherein, The milling wheel drive (14) and the milling wheel (12) have fixing elements (20, 22) for fixing the milling wheel (12), which are arranged linearly in the direction of the mounting axis relative to at least two spacer elements (24) arranged at the milling wheel drive (14), the method having the steps of: - guiding the milling wheel (12) to the milling wheel drive (14); - roughly aligning the milling wheel (12) relative to the milling wheel drive (14) such that the fixing elements (20, 22) are opposite one another without, in this case, contacting one another; - connecting each centring element (30) to the spacer elements (24); - fine aligning the milling wheel (12) relative to the spacer elements (24) by means of the centring elements (30), wherein the fixing elements (20, 22) do not contact one another; and - moving the milling wheel (12) relative to the spacer elements (24) by means of the centring elements (30) such that the fixing elements (20, 22) engage one another.

2. The method of claim 1, wherein, The spacer elements (24) and / or the fixing elements (20) arranged at the milling wheel drive (14) project perpendicularly from the outer side of the milling wheel drive (14) facing the milling wheel (12).

3. The method of claim 2, wherein, The spacer elements (24) and / or the fixing elements (20) arranged at the milling wheel drive (14) are distributed over the circumference of the milling wheel drive (14).

4. The method of claim 1, wherein, The spacer elements (24) come into contact with the milling wheel (12) earlier than the fixing elements (20) when the milling wheel (12) is moved.

5. The method of claim 4, wherein, The spacer elements (24) have a greater length than the fixing elements (20) arranged at the milling wheel drive (14).

6. The method according to any of the preceding claims, characterized in that, The fixing elements (20) arranged at the milling wheel drive (14) are pins and the fixing elements (22) arranged at the milling wheel (12) are holes, wherein, when the milling wheel (12) is moved relative to the spacer elements (24), the pins are pushed through the holes and are then locked by means of locking elements (28).

7. The method of claim 6, wherein, The pins are threaded pins.

8. The method of claim 6, wherein, The locking elements (28) are nuts.

9. The method according to any one of claims 1 to 5, characterized in that, The centring elements (30) are connected to the spacer elements (24) from the side of the milling wheel (12) facing away from the milling wheel drive (14).

10. The method of claim 9, wherein, The centring elements (30) are screwed to the spacer elements (24).

11. The method of claim 9, wherein, The centring elements are removed from the spacer elements (24) after assembly of the milling wheel (12) is complete.

12. The method according to any one of claims 1 to 5, characterized in that, For each spacer element (24), a recess (25) is configured at the fixing flange (18) of the milling wheel (12), wherein the spacer element enters the recess (25) when the milling wheel (12) is moved relative to the spacer elements (24).

13. The method of claim 12, wherein, The spacer elements (24) remain at the milling wheel drive (14) after assembly of the milling wheel (12) is complete.

14. The method of claim 12, wherein, The centring element (30) is connected to the spacer element (24) through the recess (25), wherein the centring element (30) is moved for fine alignment and / or for moving the milling wheel (12) in the direction of the milling wheel drive (14).

15. The method of claim 14, wherein, The centring element (30) is connected to the spacer element (24) through the recess (25) by means of a threaded pin (26).

16. The method of claim 14, wherein, For fine alignment and / or for moving the milling wheel (12) in the direction of the milling wheel drive (14), the centring element is screwed so that the centring element (30) is moved.

17. The method of claim 14, wherein, The centring element (30) has a conical section (32) which cooperates with the recess (25) when moved in the direction of the milling wheel drive (14) and aligns the milling wheel (12) in such a way that the spacer element (24) is aligned with the associated recess (25).

18. The method of claim 17, wherein, The centring element (30) has a first stop (34) in the region of the conical section (32), which rests against the milling wheel (12) after the fine alignment.

19. The method of claim 18, wherein, The first stop (34) is annular in the region of the conical section (32).

20. The method of claim 18, wherein, When the centring element (30) is moved further in the direction of the milling wheel drive (14), the first stop (34) likewise pushes the milling wheel (12) in the direction of the milling wheel drive (14) so that the spacer element (24) enters the recess (25).

21. The method of claim 18, wherein, When the centring element (30) is screwed further in the direction of the milling wheel drive (14), the first stop (34) likewise pushes the milling wheel (12) in the direction of the milling wheel drive (14) so that the spacer element (24) enters the recess (25).

22. The method of any one of claims 17-21, wherein, The centring element (30) is connected to the spacer element (24) by means of a threaded pin (26) and can be moved in the direction of the spacer element (24) by screwing and has a continuous thread hole (36) for accommodating the threaded pin (26).

23. The method of claim 22, wherein, The centring element (30) has a second stop (35) at its end facing away from the conical section (32) and, after the milling wheel (12) has been moved relative to the spacer element (24) by a first distance, the centring element is unscrewed from the threaded pin (26) and screwed onto the threaded pin (26) again with the other end until the second stop (35) hits the milling wheel (12) so that the milling wheel (12) is pushed further in the direction of the milling wheel drive (14) when screwing is continued.

24. The method of claim 22, wherein, The centering element (30) has a recess (38) at its end facing away from the conical section (32) which opens into the threaded hole (36), wherein the spacer element (24) enters the recess (38) after being screwed onto the threaded pin (26) and after the further movement of the milling wheel (12) in the direction of the milling wheel transmission (14) until the milling wheel (12) and the fixing elements (20, 22) of the milling wheel transmission (14) are fully engaged with one another.

25. The method of any one of claims 1 to 5, wherein, At least two pre-centering elements (40) are arranged at the side of the milling wheel (12) facing the milling wheel transmission (14) and each have an inclined face, wherein the milling wheel (12) is first pushed onto the milling wheel transmission (14) by the pre-centering elements (40) when being guided thereto and is pre-centered with respect to the milling wheel transmission (14) by the inclined faces of the pre-centering elements (40).

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