EP3683362A2 - Trench wall cutter - Google Patents

Abstract

The invention relates 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 having a carrier structure, at least one gear arranged on the carrier structure and at least one with The gear unit is connected to the gear unit and can be driven by the motor unit for comminuting soil material, the motor unit being releasably connectable to the drive unit and the frame and the drive unit each having guide means which are designed such that the drive unit enters and enters the frame laterally can be pushed out of this.

Description

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

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

With trench wall cutters, two cutting wheels are usually installed per drive unit. Accordingly, at least two gearboxes assigned to the respective milling wheels are used per trench wall cutter or per drive unit. These gearboxes 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. This means that not only the initial assembly of the drive unit is a relevant step, but also the repeated removal and installation necessary in the event of maintenance or wear. When installing and removing, the complete drive unit is usually assembled or disassembled to provide access to the gearboxes. This exchange process typically turns out to be cumbersome and time-consuming.

Against this background, the present invention has for its object to provide a trench 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 cutter with the features of claim 1 and by a trench cutter with the features of claim 10.

Accordingly, the invention relates on the one hand 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 which can be detachably connected to the frame. The drive unit comprises a carrier structure, at least one gear arranged on the carrier structure and at least one milling tool connected to the gear 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 in such a way that the drive unit enters the frame laterally with respect to a longitudinal axis of the frame, in particular when the connection to the motor unit is released - and can be pushed out of it.

Pushing the drive unit, which is separate from the motor unit, in and out laterally offers considerable advantages when carrying out maintenance work and enables 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 installed position in or on the frame during assembly or maintenance work, while only the drive unit has to be dismantled or assembled. In particular, the assembly times are when installing and Expansion therefore significantly shorter than with conventional trench wall cutters. The simplified assembly and disassembly process also increases safety in the workplace. 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 result from the subclaims and the following description.

In one embodiment it is provided that the drive unit has a motor mount with which the motor unit can be detachably connected and which is preferably arranged on the top 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 released, so that the drive unit can be moved laterally with respect 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 a quick coupling or multi-coupling.

Several motor units and, accordingly, several motor mounts can be provided. Furthermore, the trench wall cutter can comprise a plurality of 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 receptacle can be pushed when the drive unit is moved by means of the guide means. The assembled motor protrudes into the frame of the trench cutter and can be moved relative to the frame after being separated from the motor unit and pushed through the recess (es). The cutout therefore 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 configured as chamfers, the beveled surfaces of which contact one another in the connected state. When the drive unit is laterally displaced relative to the frame, the beveled surfaces thus slide past one another. There may be freedom of movement perpendicular to the direction of insertion and removal. For example, when the drive unit is moved, there is room for movement downwards (with the frame aligned vertically), 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 top 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, a detachable connection of the drive unit and frame relative to the frame being seen either by lateral insertion of the drive unit can be produced in the lateral recess or (with vertical alignment of the frame) from below to bring the drive unit into the lower recess.

For example, the first assembly of the drive unit or an assembly after replacing or servicing the motor unit, preferably with the motor unit connected to the motor mount, can be carried out relative to the frame from bottom to top by pushing it into the lower recess. This is therefore dimensioned in particular so that the motor mount together with the motor unit connected to it can be inserted. On the other hand, the drive unit can be installed and removed for assembly or maintenance purposes of the wear parts such as the gearbox and wear plates after the connection to the motor unit has been disconnected by moving the drive unit sideways with respect to the frame.

In a further embodiment it is provided that the guide means are arranged and designed such that when the drive unit is introduced into the lower recess of the frame, the drive unit is centered and finely positioned relative to the frame. The guide means therefore have a double function. These are preferably designed as chamfers, with the chamfered surfaces of the chamfers formed on the frame pointing downward, so that when the drive unit is introduced from the bottom up, centering is automatically carried out by contacting and guiding the respective chamfered surfaces. This significantly simplifies and speeds up the paving process.

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 detachably 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 serve 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 having a carrier structure, at least one gear arranged on the carrier structure and at least one connected to the gear and milling tool drivable 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 releasably connected to one another are. According to the invention, the motor unit can be releasably connected to the drive unit, the connection 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 connection means, which are easily accessible from the outside and which are preferably parts of a screw-nut connection, significantly simplify the assembly and disassembly of the drive unit on the frame. This results in an enormous saving of time and an increase in safety at the workplace compared to embodiments in which connecting elements have to be loosened or attached within the frame during disassembly 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 such that the parts of the connecting means which are accessible from the outside are located within the indentations and within the outer contour which is extended beyond the indentations of the frame are arranged.

By providing indentations, which are arranged in particular laterally, the parts of the connecting means that are 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 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 having a carrier structure, at least one arranged on the carrier structure Gearbox and at least one milling tool connected to the gearbox and drivable by the motor unit for comminuting soil material, the frame and the drive unit each having connecting means by means of which the frame and the drive unit can be releasably connected to one another, the motor unit being releasably connectable to the drive unit The connecting means are accessible from the outside, so that the connection between the drive unit and the frame can be made or released from the outside, and the frame and the drive unit have guide means which are designed such that the drive unit is connected laterally when the connection to the motor unit is released can be inserted into and removed from the frame.

Here, the advantages and features of the two previously described trench wall milling machines according to the invention are combined, so that the specific advantages and features as well as the possible further embodiments need not 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 result from the exemplary embodiment explained below with reference to the figures. Show it:

Figure 1:

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

Figure 2:

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

Figure 3:

the embodiment of the trench cutter according Figure 2 in a disassembled condition.

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

The Figure 2 shows a section of an embodiment of the trench 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 further 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 for milling tools designed as a milling wheel are connected. The support structure 1 has a substantially T-shaped cross section when viewed from the side, gears 3 being arranged at the same height on both sides of the longitudinal bar of the T-shaped cross section. The support structure 1 has wear plates 5 on the end faces (seen 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 have to be replaced at regular intervals. Conventionally, the entire drive unit 12 together with the motor unit (s) 9 connected to it must be dismantled and the corresponding components replaced or serviced. The present invention significantly simplifies and speeds up this exchange or assembly and disassembly process.

The drive unit 12 is reversibly connected to the underside of the frame 7 of the trench wall cutter 10 on its upper side (via the crossbar of the T-shaped cross section seen from the side) via corresponding connecting means 8. The connecting means 8 form a screw-nut connection, wherein the top of the support structure 1 and the lower region of the frame 7 have 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 further comprises at least one motor unit 9, by means of which the cutting wheels can be driven via the gears 3. The energy supply to 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 arranged on the upper side of the drive unit 12, with 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 a quick or multi-coupling. 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 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, if appropriate together with the motor unit 9 already connected to the motor mount 2, can be introduced when the drive unit 12 is installed.

The upper side of the carrier structure 1 has guide means 6 designed as chamfers, which correspond to corresponding guide means 6 also designed as chamfers on the underside of the frame 7 at the edge of the recess. The chamfered surfaces of the chamfers 6 of the frame 7 point downwards, the chamfered surfaces of the chamfers 6 of the drive unit 12 and the frame 7 making contact in the assembled state. When the drive unit 12 is introduced into the lower recess, the chamfers 6 act as aids which the Center drive unit 12 on the last piece when pushing it 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 (seen from the side). The recess 13 is open at the bottom and thus forms a continuous opening with the lower recess. The bevels 6 (with vertically aligned trench wall milling machine 10) 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 by means of which the drive unit 12 can be laterally displaced horizontally (with the trench wall cutter 10 oriented vertically) with respect to the frame 7. For this, the connection via the connection means 8 must of course be disconnected.

The drive unit 12 can therefore be pushed out of the frame 7 or pushed into it laterally after the connection between the motor mount 2 and the motor unit 9 has been released without the motor unit 9. The guidance along the guide means 6 facilitates the process of moving. This results in a simplified and accelerated disassembly and assembly process of the drive unit 12, 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 servicing the components which are susceptible to wear, such as the transmission 3, cutter wheel receptacles 4 or wear plates 5.

The guide means 6 thus fulfill a double function. They serve on the one hand to center the drive unit 12 during assembly from bottom to top (in the case of 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 when moving laterally Slide in or out via the lateral recess 13 (in which case the motor unit 9 is not connected to the motor mount 2).

The frame 7 can have such a recess 13 on both sides, so that it can be pushed in and out laterally on 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 laterally installed and removed 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 side by side, 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, in this case the frame 7 expediently has a recess 13 on both sides, so that each of the drive units 12 on the corresponding side in the frame 7 can be inserted.

In addition, the frame 7 in the lower region of the front and back (which is in the Figure 2 To the right and left of the lateral recess 13) are indentations 11, within which, in the connected state, the parts of the connecting means 8 accessible from the outside (in particular the nuts) are located. As a result, the screw-nut connections between the drive unit 12 and the frame 7 can be easily loosened or fixed from the outside without additional connecting elements being required inside the frame 7, which would make assembly and disassembly more difficult. Furthermore, the nuts 8 are located completely within the indentations 11, ie inside the outer contour of the frame 7, which would be obtained if the outer contour were extended beyond the indentations 11, ie which are without indentations 11 would result. This results in a space saving 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 cutter 10 is shown in a state in which the drive unit 12 has been removed from the frame 7, the motor unit 9 being connected to the motor mount 2. Such disassembly takes place with respect to the (vertically aligned) frame 7 from top to bottom over the lower recess of the frame 7. In this illustration, the chamfers 6 of the frame 7 and the support structure 1 can be seen individually.

Reference symbol list:

1

Support structure

2nd

Engine mount

3rd

transmission

4th

Milling wheel holder

5

Wear plate

6

Leadership resources

7

frame

8th

Lanyard

9

Motor unit

10th

Trench cutter

11

indentation

12th

Drive unit

13

Recess

20

Carrier device

Claims (12)

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) detachably connectable to the frame (7), the drive unit (12) comprises a support structure (1), at least one gear (3) arranged on the support structure (1) and at least one milling tool for comminuting soil material that is connected to the gear (3) and can be driven by the motor unit (9),
characterized,
that the motor unit (9) can be detachably connected to the drive unit (12) and that the frame (7) and the drive unit (12) each have guide means (6) which are designed such that the drive unit (12), in particular when released Connection to the motor unit (9), laterally in and out of the frame (7). Trench wall cutter (10) according to claim 1, characterized in that the drive unit (12) has a motor mount (2) with which the motor unit (9) is releasably connectable and which is preferably arranged on the top of the support structure (1). Trench wall cutter (10) according to claim 2, characterized in that the frame (7) has on at least one side, preferably on two opposite sides, a recess (13) through which the drive unit (6) can be moved by means of the guide means (6). 12) the motor mount (2) can be pushed through. Trench wall cutter (10) according to one of the preceding claims, characterized in that the guide means (6) of the frame (7) and the drive unit (12) are designed as chamfers, the beveled surfaces of which contact one another in the connected state. Trench wall cutter (10) according to one of the preceding claims, characterized in that the frame (7) has a recess on the underside thereof, into which a part, preferably an upper part, of the drive unit (12) can be inserted, with a detachable connection of the drive unit (12) and the frame (7) relative to the frame (7) can be produced either by inserting the drive unit (12) into the side recess (13) from the side or by inserting the drive unit (12) from bottom to top into the lower recess is. Trench wall cutter (10) according to claim 5, characterized in that the guide means (6) are arranged and designed such that when the drive unit (12) is introduced into the lower recess of the frame (7), the drive unit (12) is centered and finely positioned to the frame (7) takes place. Trench wall cutter (10) according to claim 5 or 6, characterized in that the drive unit (12) in a state in which the motor unit (9) is connected to the motor mount (2) can be introduced into the lower recess. Trench wall cutter (10) according to one of the preceding claims, characterized in that the drive unit (12) can be detachably connected to the lower end of the frame (7). Trench wall cutter (10) according to one of the preceding claims, characterized in that the motor unit (9) can be detachably connected to the frame (7). 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 for comminuting soil material connected to the gear (3) and drivable by the motor unit (9), 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 is made or released between the drive unit (12) and frame (7) can be carried out from the outside. Trench wall cutter (10) according to claim 10, characterized in that the frame (7) has indentations (11) which allow access to the connecting means (8) from the outside, the frame (7) preferably being designed such that the externally accessible parts of the connecting means (8) are arranged inside 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 to 9 and according to one of claims 10 to 11.

Images