EP3851586A1 - Trench wall cutter - Google Patents

Abstract

The invention relates to a trench wall cutter for producing vertical bottom slots, which can be connected to a carrier device, comprising a frame, a motor unit and a drive unit releasably connectable to the frame, the drive unit comprising a carrier structure, at least one gearbox arranged on the carrier structure and at least one with the transmission connected and drivable by the motor unit milling tool for comminuting soil material, wherein the motor unit can be detachably connected to the drive unit and wherein the frame and the drive unit each have guide means which are designed so that the drive unit laterally in and out of the frame can be pushed out of this.

Description

The present invention relates to a trench wall cutter according to the preamble of claim 1 and a trench wall cutter according to the preamble of claim 10.

Trench wall cutters are known from the state of the art in a wide variety of variants. A wide variety of drive methods can be used for the milling tools of such trench wall milling machines, which are used to comminute the soil material in the production of the soil slot. Often one or more motors are used for the rotary drive of several milling wheels via appropriate gears.

In the case of trench wall cutters, two cutter wheels are usually installed per drive unit. Accordingly, there are at least two gears assigned to the respective cutting wheels per trench wall cutter or per drive unit. These gears and other components such as wear plates mounted on the drive unit are affected by the usual milling wear and must therefore be regularly serviced or replaced. Thus, not only the initial assembly of the drive unit is a relevant work step, but also the repetitive necessary removal and installation in the event of maintenance or wear.

When installing and removing, the complete drive unit is usually installed or dismantled in order to gain access to the gearboxes. This exchange process typically proves to be cumbersome and time-consuming.

Against this background, the present invention is based on the object of providing a trench wall cutter with a drive unit which can be assembled and disassembled quickly and easily.

According to the invention, this object is achieved by a trench wall cutter with the features of claim 1 and by a trench wall cutter with the features of claim 10.

Accordingly, the invention relates on the one hand to a trench wall cutter for producing vertical floor slots, which can be connected to a carrier device, comprising a frame, a motor unit and a drive unit which can be detachably connected to the frame. The drive unit comprises a support structure, at least one gearbox arranged on the support structure and at least one milling tool, connected to the gearbox and drivable by the motor unit, for comminuting soil material. According to the invention, the motor unit can be detachably connected to the drive unit, the frame and the drive unit each having guide means which are designed so that the drive unit laterally enters the frame with respect to a longitudinal axis of the frame, in particular when it is detached from the motor unit - and can be pushed out of this.

The lateral pushing in and out of the drive unit, which is separate from the motor unit, has considerable advantages when performing maintenance work and enables the components to be exchanged in just a few steps. The motor unit, which is not subject to wear to the same extent as the gearbox, can remain in the built-in position in or on the frame during assembly or maintenance work, while only the drive unit is dismantled or assembled must become. In particular, the assembly times for installation and removal are therefore significantly shorter than with conventional trench wall cutters. The simplified assembly and disassembly process also increases workplace safety. Potential errors in the exchange process are minimized by the small scope and the simple design of the overall process.

Advantageous embodiments of the invention emerge from the subclaims and the following description.

In one embodiment it is provided that the drive unit has a motor mount to which the motor unit can be detachably connected and which is preferably arranged on the upper side of the support structure. To dismantle the drive unit, only the connection between the motor unit and the motor mount and the connection between the drive unit and the frame have to be loosened so that the drive unit can be moved laterally in relation to the frame of the trench cutter while the motor unit remains in the installed position. The motor mount can have mechanical connections and connections for hydraulic and / or electrical lines. These can be designed as quick-release couplings or multi-couplings.

Several motor units and accordingly several motor mounts can be provided. Furthermore, the trench wall cutter can comprise several drive units, each with an associated motor unit.

In a further embodiment it is provided that the frame has a recess on at least one side, preferably on two opposite sides, through which the motor mount can be pushed when the drive unit is displaced using the guide means. In the assembled state, the motor mount protrudes into the frame of the trench wall cutter and, after being separated from the motor unit, can be moved relative to the frame and pushed through the recess (s). The recess thus has geometric dimensions that exceed those of the motor mount.

In a further embodiment it is provided that the guide means of the frame and the drive unit are designed as chamfers, the bevelled surfaces of which contact one another in the connected state. During the lateral displacement of the drive unit relative to the frame, the beveled surfaces slide past one another. Here, there can be a freedom of movement perpendicular to the push-in and push-out direction. For example, when the drive unit is displaced, there may be downward movement (with vertical alignment of the frame), so that the drive unit must be pressed in the direction of the frame for contacting guidance by means of the guide means.

The guide means are preferably formed both on the frame and on the support structure. In particular, the motor mount can be arranged between the guide means on the upper side of the support structure.

In a further embodiment it is provided that the frame has a recess on the underside into which a part, preferably an upper part, of the drive unit can be inserted, with a detachable connection of drive unit and frame relative to the frame either via lateral insertion of the drive unit can be produced in the lateral recess or (with vertical alignment of the frame) from the bottom upwards introduction of the drive unit into the lower recess.

For example, the initial assembly of the drive unit or assembly after replacing or servicing the motor unit, preferably with the motor unit connected to the motor mount, can be done from the bottom upward relative to the frame by pushing it into the lower recess. This is therefore particularly dimensioned so that the motor mount can be pushed in together with the motor unit connected to it. An installation and removal of the drive unit for assembly or maintenance purposes of the wear parts such as gear and wear plates, however, can take place after separating the connection to the motor unit by moving the drive unit laterally in relation to the frame.

In a further embodiment it is provided that the guide means are arranged and designed in such a way that when the drive unit is introduced into the lower recess of the frame, the drive unit is centered and precisely positioned relative to the frame. The guide means therefore fulfill a double function. These are preferably designed as bevels, the bevelled surfaces of the bevels formed on the frame pointing downwards, so that when the drive unit is introduced from bottom to top, centering takes place automatically via the contacting and guidance of the respective beveled surfaces. This makes the installation process much easier and faster.

In a further embodiment it is provided that the drive unit can be introduced into the lower recess in a state in which the motor unit is connected to the motor mount.

In a further embodiment it is provided that the drive unit can be releasably connected to the lower end of the frame.

In a further embodiment it is provided that the motor unit can be detachably connected to the frame or to corresponding connections provided on the frame, wherein the connections can be used to produce a hydraulic and / or electrical supply to the motor unit.

The present invention further comprises a trench wall cutter for producing vertical bottom slots, which can be connected to a carrier device, comprising a frame, a motor unit and a drive unit, the drive unit comprising a carrier structure, at least one gearbox arranged on the carrier structure and at least one gearbox connected to the gearbox and comprises a milling tool that can be driven by the motor unit for comminuting soil material and wherein the frame and the drive unit have connecting means by means of which the frame and the drive unit can be detachably connected to one another. According to the invention the motor unit can be detachably connected to the drive unit, the connecting means being accessible from the outside, so that the connection between the drive unit and the frame can be established or released from the outside.

The assembly and disassembly of the drive unit on the frame is significantly simplified by the connecting means, which are easily accessible from the outside and which are preferably parts of a screw-nut connection. This results in enormous time savings and an increase in safety at the workplace compared to embodiments in which connecting elements within the frame have to be detached or attached during dismantling or assembly.

In one embodiment it is provided that the frame has indentations which allow access to the connecting means from the outside, the frame preferably being designed so that the externally accessible parts of the connecting means are inside the indentations and within the outer contour extended beyond the indentations of the frame are arranged.

By providing indentations, which are arranged laterally in particular, the parts of the connecting means accessible for establishing or releasing the connection, in particular the nuts and screw heads of the screw connections, do not protrude beyond the outer contour of the frame, which would be obtained without indentations, so that the space requirement or the external dimensions of the trench wall cutter do not increase. The indentations are preferably arranged on the sides of the frame on which there are no recesses.

The present invention further comprises a trench wall cutter for producing vertical bottom slots, which can be connected to a carrier device, comprising a frame, a motor unit and a drive unit, the drive unit comprising a carrier structure, at least one gearbox arranged on the carrier structure and at least one gearbox connected to the gearbox and from the motor unit drivable milling tool for comminuting soil material, wherein the The frame and the drive unit each have connecting means, by means of which the frame and the drive unit can be detachably connected to one another, the motor unit being releasably connectable to the drive unit, the connecting means being accessible from the outside so that the connection between the drive unit and the frame can be established or released can be carried out externally and wherein the frame and the drive unit have guide means which are designed such that the drive unit can be inserted laterally into the frame and removed from it when the connection to the motor unit is released.

Here, the advantages and features of the two previously described trench wall cutters according to the invention are combined, so that the specific advantages and features as well as the possible further embodiments do not have to be discussed again at this point.

Figur 1:

ein Trägergerät mit einer erfindungsgemäßen Schlitzwandfräse in einer Seitenansicht;

Figur 2:

ein Ausführungsbeispiel der erfindungsgemäßen Schlitzwandfräse in montiertem Zustand in einer Seitenansicht; und

Figur 3:

das Ausführungsbeispiel der Schlitzwandfräse gemäß Figur 2 in einem demontierten Zustand.

Further features, details and advantages of the invention emerge from the exemplary embodiment explained below with reference to the figures. Show it:

Figure 1:

a carrier device with a trench wall cutter according to the invention in a side view;

Figure 2:

an embodiment of the trench wall cutter according to the invention in the assembled state in a side view; and

Figure 3:

the embodiment of the trench wall cutter according to Figure 2 in a dismantled state.

In the Figure 1 a carrier device 20 designed as a mobile cable excavator with a trench wall cutter 10 according to the invention is shown in a side view. Of course, other work machines such as hydraulic excavators or special foundation engineering devices can also be used as the carrier device 20 for the trench wall cutter 10 according to the invention.

the Figure 2 shows a detail of an embodiment of the trench wall cutter 10 according to the invention in a side view, in which the drive unit 12 and the lower end of the frame 7 are shown. The trench wall cutter 10 comprises a frame 7, with the lower end of which a drive unit 12 is detachably connected.

The drive unit 12 comprises a support structure 1, which has a supporting function for the other components of the drive unit 12 such as the milling tools (not shown). In the lower area of the support structure 1 there are several gears 3, with which receptacles 4 are connected for milling tools designed as milling wheels. The support structure 1 has an essentially T-shaped cross section, seen from the side, with gears 3 being arranged at the same height on both sides of the longitudinal beam of the T-shaped cross section. The carrier structure 1 has wear plates 5 on the end faces (viewed from the side).

The gear 3 and the wear plates 5 represent particularly wear-prone and therefore maintenance-intensive components of the drive unit 12, which must be replaced at regular intervals. Conventionally, the entire drive unit 12 together with the motor unit (s) 9 connected to it must be dismantled for this purpose and the corresponding components exchanged or serviced. The present invention simplifies and accelerates this exchange or assembly and disassembly process significantly.

The drive unit 12 is reversibly connected on its upper side (via the transverse bar of the T-shaped cross section as seen from the side) via corresponding connecting means 8 to the underside of the frame 7 of the trench wall cutter 10. The connecting means 8 form a screw-nut connection, the top of the support structure 1 and the lower region of the frame 7 having corresponding openings for the screws 8.

The trench wall cutter 10 according to the invention can be fastened or suspended on a carrier device 20 via the frame 7. The trench wall cutter 10 furthermore comprises at least one motor unit 9, by means of which the cutting wheels can be driven via the gear 3. The energy supply of the motor unit (s) 9 is ensured by corresponding supply lines in or on the frame 7. The motor unit 9 can comprise or represent a hydraulic or electric motor.

The motor unit 9 is connected to the drive unit 12 via a motor mount 2 which is arranged on the top of the drive unit 12 and to which the motor unit 9 can be detachably connected. For this purpose, corresponding connections for mechanical, electrical, hydraulic and / or other connections are provided, which can be designed, for example, as quick or multi-couplings. The connection of the motor unit 9 to the connections of the frame 7 is also detachable and can also be designed as a quick-release or multi-coupling.

The motor mount 2 protrudes into the frame 7, so that the motor unit 9 is arranged within the frame 7 in the assembled state. For this purpose, the frame 7 has a recess on the underside into which the motor mount 2, possibly together with the motor unit 9 already connected to the motor mount 2, can be introduced when the drive unit 12 is installed.

The top of the support structure 1 has guide means 6 designed as bevels, which correspond to corresponding guide means 6, also designed as bevels on the underside of the frame 7 at the edge of the recess. The beveled surfaces of the bevels 6 of the frame 7 point downwards, the beveled surfaces of the bevels 6 of the drive unit 12 and the frame 7 in contact in the assembled state. When the drive unit 12 is introduced into the lower recess, the bevels 6 act as aids which center the drive unit 12 on the last piece when it is pushed in. This simplifies the assembly of the drive unit 12 via the lower recess.

The drive unit 12 together with the motor unit 9 can be mounted on the frame 7 via the lower recess.

The frame 7 also has a further recess 13 on the side, the geometric dimensions of which exceed those of the motor unit 9 (viewed from the side). The recess 13 is open at the bottom and thus forms a continuous opening with the lower recess. The bevels 6 (when the trench wall cutter 10 is vertically aligned) are aligned horizontally and parallel to one another and are located on opposite edges of the lower recess. The bevels 6 thus serve as guide means via which the drive unit 12 can be shifted laterally horizontally with respect to the frame 7 (when the trench wall cutter 10 is vertically aligned). For this, of course, the connection via the connecting means 8 must be released.

The drive unit 12 can therefore be pushed laterally out of the frame 7 or pushed into it after the connection between the motor mount 2 and the motor unit 9 without the motor unit 9 has been released. The guidance along the guide means 6 facilitates the shifting process. This results in a simplified and accelerated dismantling and assembly process for the drive unit 12, with the motor unit 9 remaining in the frame 7. This is particularly advantageous in cases in which the drive unit 12 is to be removed and reinstalled for the purpose of exchanging or maintaining the components susceptible to wear, such as gear 3, milling wheel mounts 4 or wear plates 5.

The guide means 6 consequently fulfill a double function. They serve on the one hand to center the drive unit 12 during assembly from bottom to top (with a vertically aligned frame 7) via the lower recess (in which the motor unit 9 can already be connected to the motor mount 2) and on the other hand to guide the drive unit 12 in the lateral case Pushing in or out via the lateral recess 13 (the motor unit 9 in this case not being connected to the motor mount 2).

The frame 7 can have such a recess 13 on both sides, so that it is possible to slide it in and out from the side over both sides. Furthermore, it can be provided that the geometric dimensions of the lateral recess 13 exceed those of the motor mount 2 and the motor unit 9 in the connected state, so that the drive unit 12 can be installed and removed from the side together with the motor unit 9.

The drive unit 12 can either extend over the entire or essentially over the entire width of the frame 7, so that only a single drive unit 12 is used in the trench wall cutter according to the invention. Alternatively, several, in particular two, drive units 12 can be used next to one another, each of which is assigned to a motor unit 9. In this case there is a lower recess for a drive unit 12 on the underside of the frame 7. Furthermore, the frame 7 in this case expediently has a recess 13 on both sides, so that each of the drive units 12 is in the frame 7 on the corresponding side can be inserted.

In addition, the frame 7 has in the lower area of the front and back (which are in the Figure 2 right and left of the lateral recess 13) indentations 11, within which the externally accessible parts (in particular the nuts) of the connecting means 8 are in the connected state. As a result, the screw-nut connections between drive unit 12 and frame 7 can be easily loosened or fixed from the outside without the need for additional connecting elements inside the frame 7, which would make assembly and disassembly more difficult. The nuts 8 are also located completely within the indentations 11, ie within the outer contour of the frame 7, which would be obtained if the outer contour were lengthened beyond the indentations 11, ie which would result without indentations 11. This results in a saving of space and a collision of the connecting means 8 with the walls of the bottom slot to be created by the trench wall cutter 10 is avoided.

In the Figure 3 the trench wall cutter 10 is shown in a state in which the drive unit 12 is dismantled from the frame 7, the motor unit 9 being connected to the motor mount 2. Such a dismantling takes place in relation to the (vertically aligned) frame 7 from top to bottom over the lower recess of the frame 7. In this illustration, the bevels 6 of the frame 7 and the support structure 1 can be seen individually.

List of reference symbols:

1

Support structure

2

Motor mount

3

transmission

4th

Milling wheel holder

5

Wear plate

6th

Guide means

7th

frame

8th

Lanyard

9

Motor unit

10

Diaphragm wall cutter

11

indentation

12th

Drive unit

13th

Recess

20th

Carrier device

Claims (3)

Trench wall cutter (10) for producing vertical bottom slots, which can be connected to a carrier device (20), comprising a frame (7), a motor unit (9) and a drive unit (12), the drive unit (12) having a carrier structure (1) , comprises at least one gear (3) arranged on the support structure (1) and at least one milling tool connected to the gear (3) and drivable by the motor unit (9) for comminuting soil material, and wherein the frame (7) and the drive unit (12 ) Have connecting means (8) by means of which the frame (7) and the drive unit (12) can be detachably connected to one another,
characterized,
that the motor unit (9) can be detachably connected to the drive unit (12), in particular to a motor mount (2) arranged on the drive unit (12), and that the connecting means (8) are accessible from the outside so that the connection can be established or released can be carried out from the outside between the drive unit (12) and the frame (7). Trench wall cutter (10) according to claim 1, characterized in that the frame (7) has indentations (11) which allow access to the connecting means (8) from outside, the frame (7) preferably is designed so that the externally accessible parts of the connecting means (8) are arranged within the indentations (11) and within the outer contour of the frame (7) which is extended beyond the indentations (11). Trench wall cutter (10) according to one of Claims 1 or 2.

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