AT526575A2 - Processing unit for a self-propelled device for edge processing of already installed curbs, self-propelled device with such a device and edge processing method - Google Patents

Abstract

A processing unit (10) for a self-propelled device for processing the edges of curbs (B) that have already been installed comprises a tool carrier (11), a sensing device (12) with at least one sensing wheel (13) for rolling on an upper surface (O) of curbs (B), which is coupled to the tool carrier (11), and a rotating milling tool (50) that is arranged on the tool carrier (11) and can be rotated about a vertical axis (V), wherein the rotating milling tool (50) has a profiled rotation surface (51) for engagement with a curb edge (K) and the rotating milling tool (50) itself ensures lateral guidance of the processing unit (10) along the curbs (B). Furthermore, a self-propelled device with such a processing unit (10) and an edge processing method are specified.

Description

Processing unit for a self-propelled device for edge processing of already installed curbs, self-propelled device with such and

Edge processing process

The invention relates to a processing unit for a self-propelled device for edge processing of already installed curbs as well as to a self-propelled device with such a processing unit and a method for

Edge processing of already installed curbs.

Sharp-edged curbs can cause damage to tires and wheel rims of vehicles. One possible solution is to produce curbs with rounded edges and then install them. However, this procedure is very complex for curbs made of natural stone. It is therefore common practice in road and path construction to first install broken curbs and then to round off their edges.

to break.

Usually, this edge breaking is done by stump grinding using a stump hammer, which is used to hit the edge to be worked on. This stump grinding can also be done using automated devices such as in DE 43 31 313 A1, which are guided along the curb edge. However, stump grinding results in very coarse material being removed, which must be collected in an additional work step after the edge has been worked on. A self-collecting suction sweeper is required for the residual material that is produced. If this is not available immediately after stump grinding, the residual material that is produced can be washed into the street drainage system (gully) when it rains and used to close the drainage system.

contribute.

Another problem with bush hammering is that only very small edge radii can be produced in one operation. For larger edge radii, bush hammering must be

be carried out several times with different angles of attack.

Based on this, the invention is based on the task of reducing the time required for

To reduce edge processing of already installed curbs.

according to claim 1.

The shape of the profiled rotating surface of the milling tool can be used to set the desired edge profile of the curbstone edge to be machined. In comparison to automated bush-hammering processes, a significantly larger edge area can be machined in one operation, so that a single operation is usually sufficient to break the curbstone edge and produce the desired profile shape. This means a considerable time saving when producing larger edge radii on a curbstone edge. Larger radii are less important in terms of the

Avoiding damage to vehicle wheels is advantageous.

In addition, the removed material from the curb is ground very evenly and finely during milling, so that it is practically produced as rock powder, which can be tolerated by even the slightest air movement during milling and can be vacuumed and/or washed away by natural precipitation. An additional subsequent operation to remove the removed material can

This eliminates the need for additional work, which also saves a considerable amount of time.

Since the rotating milling tool rotates around the vertical axis, the tool itself ensures lateral guidance of the processing unit along the curbs, so that an additional feeler wheel or the like is not required in this direction

This keeps the structure of the processing unit simple.

Special designs of the processing unit are the subject of further,

dependent claims.

For example, the sensing device can have a height adjustment mechanism via which the at least one feeler wheel is coupled to the tool carrier. The height adjustment mechanism can be used to adjust the height of the milling tool to the at least one feeler wheel. This enables easy adaptation to different

Milling tools and edge profile shapes.

According to a special embodiment, the height adjustment mechanism can have at least one threaded spindle, via which a wheel carrier, on which the at least one feeler wheel is rotatably mounted, is coupled to the tool carrier. The threaded spindle can be used to adjust the height of the milling tool relative to the

at least one feeler wheel can be done very easily and quickly.

According to another special embodiment, the at least one feeler wheel can be formed by a first feeler wheel and a second feeler wheel, which are arranged one after the other, with an adjustment mechanism being provided between these and the tool carrier in order to adjust the position of the first feeler wheel and the second feeler wheel relative to the rotating milling tool, such that in a first position, the axis of rotation of the first feeler wheel intersects the axis of rotation of the rotating milling tool and in a second position the axis of rotation of the second feeler wheel intersects the axis of rotation of the rotating milling tool. Such an adjustment of the axis distance between the two feeler wheels on the upper curb surface in the longitudinal direction enables a particularly harmonious transition of the processed curb edge when changing from high to low curb and vice versa, thereby achieving a particularly attractive work result. The position of the first feeler wheel in the forward direction exactly on the center axis of the milling tool enables a uniform rounding to be ensured with a lowered curb (e.g. garage entrance). When reversing, the adjustment device can be operated so that the second feeler wheel is on the center axis of the milling tool in order to achieve the same result with a uniform rounding in the opposite direction. The adjustment mechanism can optionally include an actuator in the form of a hydraulic cylinder or the like in order to switch between the feeler wheels, for example from the

from the driver's cab of a construction vehicle.

According to another particular embodiment of the invention, the profiled surface of rotation of the rotating milling tool can, without limitation, be curved in cross-section in order to obtain a rounded curb edge. However, it is also possible to profile the rotating milling tool in a different way, for example to create a bevel or other profile shapes on the curb edge.

milling.

Preferably, the profiled rotating surface of the milling tool is equipped with a large number of individual milling nubs made of a cutting material, in particular hard metal, cutting ceramic, diamond or drilling nitride. This results in a long service life of the milling tool, since damage to individual milling nubs does not have a direct impact on the quality of the work.

become relevant.

According to another special design, the milling knobs are attached to a

Base body with a profiled cross-section rotation surface arranged in a spiral shape and protruding from the base body. The milling studs can be arranged on the base body in rows in a ring around the vertical axis and parallel to one another.

The milling studs can also be arranged in regular patterns or irregularly.

Preferably, the free ends of the milling studs are on an arc with a radius in the range of 15 to 80 mm, preferably 35 to 60 mm. This allows large radii of curvature on the installed curbs to be achieved in a single

operation. However, smaller radii are also possible.

To solve the above-mentioned problem, a self-propelled device according to claim 11 is also proposed. This comprises a self-propelled construction vehicle with a force generating device arranged on it and a processing unit of the aforementioned type. The milling tool of the processing unit is supplied with drive energy by the force generating device of the self-propelled construction vehicle, whereby the processing unit with milling tool and sensing device remains extremely compact and can be connected to a large number of construction vehicles, such as mini excavators, loaders or the like. The force generating device can, for example, be a hydraulic unit for providing pressure, a generator for providing electrical current or an electric motor for providing a

drive torque.

Furthermore, the processing unit for the self-propelled device can have a lifting and lowering mechanism, via which the tool carrier is coupled to that of the self-propelled device in order to raise and lower the tool carrier. This enables, for example, easy adaptation to high-sided and

Deep curbs possible.

is located below the tool carrier.

The above-mentioned object is further achieved by a method for edge processing of already installed curbs according to claim 12. This is characterized in that the self-propelled device of the type mentioned above travels along already installed curbs, and the milling tool is brought into engagement with a curb edge while rotating about the vertical axis in order to profile the curb edge in preferably one operation and thereby provide the corresponding material removal in a fine-grained manner, preferably in such a way that this fine-grained material removal is achieved by

can be washed away by natural precipitation.

In the following, a way of implementing the invention is described using a

The drawings show the embodiment shown in more detail.

in:

Figure 1 is a side view of an embodiment of a processing unit according to the invention,

Figure 2 is a front view of the embodiment,

Figure 3 further side view of the processing unit in connection with a construction vehicle,

Figure 4 a view of the construction vehicle processing unit from the front,

Figure 5 is a side view of an example of the milling tool,

Figure 6 is a view of the front side of the milling tool, and in

Figure 7 shows a half section of the milling tool.

become.

Based on Figures 1 and 2, the actual processing unit 10 of the self-propelled device 1 is first explained in more detail, which can be connected to a self-propelled construction vehicle 100 shown in more detail in Figures 3 and 4, for example a loader, mini-excavator or the like. In the present case, a self-propelled construction vehicle 100 is understood to be any self-propelled vehicle which has a suitable power generating device 101 for driving the processing unit 10 and to which a suitable boom 102 with a telescope can be connected for supporting the processing unit 10. In Figures 5 to 7, a rotating milling tool 50 of the

Processing unit 10 is shown in more detail.

The processing unit 10 of the self-propelled device 1 initially comprises a

Tool carrier 11, on which the rotating milling tool 50 is rotatably mounted.

Furthermore, in Figures 1 and 2, a sensing device 12 of the processing unit 10 with at least one sensing wheel 13 for rolling on an overhead surface O of installed curbs B can be seen. This sensing device 12 is coupled to the tool carrier 11 and serves to position the tool carrier 11 at a set height above

the installed curbs B.

The processing unit 10 further comprises the already mentioned rotating milling tool 50. The rotating milling tool 50 is arranged on the tool carrier 11 in such a way that it can rotate about a vertical axis A. In the present case, the vertical axis A is understood to be any axis which is essentially perpendicular to the upper surface O of the installed curbs B. In this case,

Deviations of the vertical axis A from the direction of gravity of approximately +/-10° result.

The rotating milling tool 50, which is shown in more detail in Figures 5 to 7, has

a profiled rotation surface 51 for engagement with a curb edge K. The

The profiled surface of rotation 51 can be formed in a curved cross-section, for example, as shown in the figures. This allows the curb edge K to be provided with a desired radius of curvature. However, other profile shapes are also possible, for example a bevel to produce a chamfer on the

Curb edge K or other profile shapes.

Since the rotating milling tool 50 rotates about the vertical axis A, the tool itself ensures lateral guidance of the processing unit 10 along the curbs, so that an additional feeler wheel or the like is not required in this direction.

This keeps the structure of the processing unit 10 simple.

For edge processing of already installed curbs B using a self-propelled device 1 of the type explained above, the self-propelled device 1 moves along the already installed curbs B. The processing unit 10 is guided along the curb edge K via the sensing device 11 and the milling tool 50. The rotating milling tool 50 is brought into machining engagement with the curb edge K. At the same time, the milling tool 50 rotates about the vertical axis A in order to profile the curb edge K in preferably a single operation and thereby provide the corresponding material removal of the curb B in a fine-grained manner such that it can be easily washed away, for example by natural

Precipitation. Larger particles are avoided.

It is also possible to accelerate the material removal, for example by means of compressed air.

fade or be collected using a suction device.

To change the height of the milling tool 50 relative to the curbs B to be machined, as shown by way of example in Figures 1 and 2, the sensing device 12 can have a height adjustment mechanism 15, via which the at least one feeler wheel 13 is coupled to the tool carrier 11. By means of the height adjustment mechanism 15, the height of the milling tool 50 relative to the at least

a touch wheel 13 adjustable.

For this purpose, the height adjustment mechanism 15 can, for example, have at least one

threaded spindle 16, via which a wheel carrier 17, on which the at least one

The feeler wheel 13 is rotatably mounted and is coupled to the tool carrier 11. In the present embodiment, the tool carrier 11 is held between two nuts 18, which are screwed onto the threaded spindle 16 and locked against each other. The height adjustment mechanism 15 with threaded spindle 16 shown is, however, merely exemplary. Instead of the adjustment principle shown,

other height adjustment mechanisms are used.

In the present case, the sensing device 12 has, without limitation, a first sensing wheel 13a located at the front in the feed direction V and a second sensing wheel 13b located behind, which are arranged on a wheel carrier 17. The wheel carrier 17 can be displaced in the feed direction V relative to the tool carrier 11 and the milling tool 50. An adjustment mechanism 19 can be provided between the two sensing wheels 13a, 13b and the tool carrier 11 in order to be able to adjust the position of the first sensing wheel 13a and the second sensing wheel 13b relative to the milling tool 50. Fig. 1 shows a position during milling in the feed direction V, in which the axis of rotation of the first sensing wheel 13a intersects the axis of rotation A of the milling tool. In a second position, the rotation axis of the second feeler wheel 13b is at the position of the rotation axis A of the milling tool 50. The first feeler wheel 13a is then in Fig. 1 in the feed direction V

delay.

In one embodiment, this adjustment mechanism 19 may comprise an actuator 22 in the form of a hydraulic cylinder or the like in order to adjust the position of the feeler wheels 13a, 13b, for example from the driver's cab of a self-propelled construction vehicle.

to adjust automatically.

The wheel carrier 17 is guided axially to the tool carrier 11 so that it can be moved longitudinally in the feed direction V. It can be designed as a rod which is guided in corresponding guides

is recorded.

In the embodiment shown, a rear guide 20b is stationary relative to the tool carrier 11 in relation to the feed direction V. A corresponding threaded spindle 16 for height adjustment can accordingly

be attached directly to the rear guide 20b.

To ensure the guidance and displacement of the wheel carrier 17, it is also linearly guided in a front guide 20a in the form of a sliding sleeve or the like. In the present case, a second threaded spindle 16 is attached to this sliding sleeve 20a, which is used for

Height adjustment is coupled to the tool carrier 11.

Preferably rigidly connected supports 21a and 21b extend upwards from the wheel carrier 17 and the rear guide 20b. The actuator 22 is integrated between these supports 21a and 21b, which can preferably be actuated by the self-propelled construction vehicle 100 in order to adjust the distance between the supports 21a and 21b and thus the position of the two feeler wheels 13a and 13b relative to the tool carrier 11 and

Milling tool 50 to change.

A drive unit 30 for the rotating milling tool 50 is located on the tool carrier 11. The drive unit 30 can be, for example, a hydraulic motor, which is generated with drive energy by an external power generation device. Preferably, however, this power generation device 101 is located on the self-propelled construction vehicle 100. In the case of a hydraulic motor, hydraulic pressure is made available via the power generation device 101. In a modification of this, the drive unit 30 can also be based on other mechanisms, for example, be designed as an electric motor, which is supplied with power by the self-propelled construction vehicle 100, or be a transmission, which is mechanically acted upon by a drive torque by the self-propelled construction vehicle 100.

becomes.

The drive unit 30 or the hydraulic motor is coupled to the rotating milling tool 50, for example by means of a drive shaft 31. The drive unit 30 is arranged above the tool carrier 11 with respect to the vertical axis A and the rotating milling tool 50 is arranged below the tool carrier 11 and thus in

Installation position facing a roadway F.

If curb edges K of different heights are to be milled, for example a transition between a high curb and a low curb or vice versa, the play of the processing unit 1 in the vertical direction is sometimes not sufficient to guide the

To ensure the sensing device 12 on the upper surface O.

For this purpose, a lifting and lowering mechanism 40 can also be provided on the processing unit 1 or on the self-propelled construction vehicle 100, via which the tool carrier 11 is coupled to the self-propelled construction vehicle 100, in the embodiment shown with the boom 102 of the self-propelled construction vehicle 100. This makes it possible to lift the tool carrier 11 with the rotating milling tool 50 from the self-propelled construction vehicle 100 and

to lower.

The lifting and lowering mechanism 40 may comprise a drive motor 41 which is coupled via a chain drive 42 to a gear 43 which in turn is integrated for height adjustment between the tool carrier 11 and the boom 102.

This allows the tool carrier 11 to be raised and lowered.

A curb is normally about 10 to 12 cm higher than the road surface F. In the case of lowerings (e.g. garage entrances, pedestrian crossings, etc.), the curb height is only about 3 cm. The lowering usually takes place over a length of about 1.5 m. After the recess, the rise to the original curb height then takes place over a length of about 1.5 m. In order to be able to process this height difference precisely, a chain of the chain drive 42 is actuated by the drive motor 41 via a first gear. The processing unit 10 is provided with a second gear that engages with the chain. This allows an operator to follow the height differences precisely using the gear control. The processing unit 10 can thus be pivoted up and down. The lifting and lowering mechanism 40 shown in the figures is merely an example and can be operated, for example, by a hydraulic drive.

for raising and lowering the processing unit 10.

In order to keep the rotating milling tool 50 in engagement with the curbstone edge K during milling, the boom 102 is provided with a floating position so that the processing unit 10 acts on the curbstone with a desired pressure. Furthermore, the floating position is important for the different heights. The boom 102 can be designed to be telescopic and pre-tensioned with a spring device, for example a gas pressure spring, in order to ensure a lateral contact pressure of the

milling tool 50 against the curb B. A telescopic adjustment of

for example up to about 50 cm is also advantageous for simplified operation of the vehicle, since the track, i.e. a lateral distance to the curb B, cannot be exactly

must be adhered to.

The rotating milling tool 50 is shown in more detail in Figures 5 to 7. As already mentioned above, it has a profiled rotation surface 51, the profiling of which

the curb edge K is formed by milling.

The profiled rotation surface 51 is preferably provided with a plurality of individual milling knobs 52 made of a cutting material such as hard metal, cutting ceramic,

Diamond or drill nitride.

As shown in Figure 7, these milling studs 52 can be arranged on a base body 53 with a profiled surface of rotation in cross section and protrude from this surface. In the present case, the milling studs 52 are designed as bolts or pins, which in

the base body 53.

The milling knobs 52 can be arranged on the base body 53 in rows in a ring around the vertical axis A and parallel to one another, as shown in Figures 5 to 7. In a variation of this, an arrangement in regular patterns is also possible.

or an irregular arrangement is possible.

Preferably, the free ends 52a of the milling knobs 52, which ultimately come into engagement with a curbstone B, lie on an arc with a radius in the range of 15 to 80 mm inclusive, preferably in the range of 35 to 60 mm. The profiled

Rotation surface 51 is curved in a concave arc corresponding to the curb edge K.

The base body 53 has a substantially cylindrical central section 53a for connection to the drive shaft 31. The attachment can be made via a front-side

Fastening bolt 55.

At the front end of the rotating milling tool 50, the central section 53a merges into a disk-shaped flange section 53b. At the outer edge of this

A curved section 53c adjoins the disk-shaped flange section 53b. This

Arc portion 53c surrounds the cylindrical central portion 53a in the manner of a pot, so that between the inner wall of the arc portion 53c and the outer wall of the

cylindrical central portion 53a an annular space 54 is formed.

The rear ends of the milling studs 52 can be accessible via this annular space 54. If necessary, the milling studs 52 can be fixed from the side of the annular space 54

from.

Furthermore, the arc section 53c can have a constant wall thickness, so that the radial width of the annular space 54 increases with increasing distance from the disk-shaped

Flange section 53b enlarged.

Furthermore, a support body 56 can be inserted into the annular space 54, which supports the inner wall of the curved section 53c radially against the outer wall of the cylindrical central section 53a. The support body 56 fills the annular space 54 at least partially,

preferably completely.

The invention has been explained in more detail using an embodiment and further modifications. However, it is expressly not limited to this specific embodiment and the modifications mentioned, but rather includes all embodiments defined by the claims. In particular, the features explained above can be implemented independently of one another and in any combination with one another to explain a way of implementing the invention, as long as this is technically possible, even if this was not expressly described above. The corresponding permutations are not all explained in detail for reasons of compactness of the description, but are hereby applicable.

expressly claimed and disclosed.

Claims (1)

Expectations Processing unit (10) for a self-propelled device for edge processing, namely for edge breaking of already installed curbs (B), comprising: a tool carrier (11), a sensing device (12) with at least one sensing wheel (13) for rolling on an upper surface (O) of installed curbs (B), which is coupled to the tool carrier (11), and a rotating milling tool (50) which is arranged on the tool carrier (11) and is rotatable about a vertical axis (V), wherein the rotating milling tool (50) has a profiled rotation surface (51) for engagement with a curb edge (K) and the rotating milling tool (50) itself has a lateral guide of the Processing unit (10) along the curbs (B). Processing unit (10) according to claim 1, characterized in that the sensing device (12) has a height adjustment mechanism (15) via which the at least one feeler wheel (13) is coupled to the tool carrier (11), wherein the height position of the rotating Milling tool (50) to which at least one feeler wheel (13) is adjustable. Processing unit (10) according to claim 2, characterized in that the height adjustment mechanism (15) has at least one threaded spindle (16), via which a wheel carrier (17), on which the at least one feeler wheel (13; 13a, 13b) is rotatably mounted, is coupled to the tool carrier (11). Machining unit (10) according to one of claims 1 to 3, characterized in that the at least one feeler wheel (13) is formed by a first feeler wheel (13a) and a second feeler wheel (13b), which are arranged one after the other, wherein an adjustment mechanism (19) is provided between these and the tool carrier (11) in order to adjust the position of the first feeler wheel (13a) and the second feeler wheel (13b) relative to the rotating milling tool (50) such that in a first position, the axis of rotation of the first feeler wheel (13a) is the axis of rotation of the rotating milling tool (50) and in a second position the - 14 - Rotation axis of the second feeler wheel (13a) the rotation axis of the rotating milling tool (50) cuts. Machining unit (10) according to one of claims 1 to 4, characterized in that the profiled rotation surface (51) of the rotating milling tool (50) in the cross-section is arched. Machining unit (10) according to one of claims 1 to 5, characterized in that the profiled rotation surface (51) of the rotating milling tool (50) is provided with a plurality of individual milling knobs (52) made of a cutting material, in particular Hard metal, cutting ceramic, diamond or drilling nitride. Processing unit (10) according to claim 6, characterized in that the milling knobs (52) are arranged on a base body (53) with a rotation surface (51) profiled in cross section and protrude from the surface of this profiled rotation surface (51), wherein the milling knobs (52) on the base body (53) - in rows in a ring shape around the vertical axis (A) and parallel to one another, - in regular patterns, or - irregular are arranged. Processing unit (10) according to claim 6 or 7, characterized in that free ends (52a) of the milling knobs (52) are on an arc with a radius in Range from 15 to 80 mm inclusive, preferably 35 to 60 mm. Processing unit (10) according to one of claims 1 to 8, characterized in that a drive unit (30), in particular in the form of a hydraulic motor, is arranged on the tool carrier (11) and is drivingly coupled to the rotating milling tool (50), wherein the drive unit (30) is arranged above the tool carrier (11) and the rotating milling tool (50) is arranged below the tool carrier (11). Processing unit (10) according to one of claims 1 to 9, characterized by a lifting and lowering mechanism (40) via which the tool carrier (11) with 12. -15- a self-propelled construction vehicle (100) to move the tool carrier (11) to raise and lower. Self-propelled device (1) for edge processing of already installed curbs (B), comprising a self-propelled construction vehicle (100) with a power generating device (101) arranged thereon, and a processing unit (10) according to one of the preceding claims, wherein the rotating milling tool (50) of the processing unit (10) is provided on the side of the power generating device (101) of the self-propelled construction vehicle (100) with is supplied with drive energy. Method for edge processing of already installed curbs (B) by means of a self-propelled device (1) according to one of claims 1 to 11, in which the self-propelled device (1) travels along curbs (B) that have already been installed, and the rotating milling tool (50) rotates about the vertical axis (A) and is brought into engagement with a curb edge (K) in order to finish profiling the curb edge (K) in a single operation and to provide the corresponding material removal in a fine-grained manner in such a way that this fine-grained material removal can be blown away, absorbed and/or removed by natural Precipitation can be washed away.