Soil compactor

Abstract

To provide a soil compactor with a soil radar density measuring device that is protected against external influences.SOLUTION: A soil compactor comprises at least one compaction roller (18, 20) rotatably supported on a compactor frame (12) and at least one soil radar density measuring device (34) arranged in an inner volume region (VI) of the compactor frame (12).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a soil compactor that can be used to compact earthen materials such as asphalt. [Background technology]

[0002] Patent Document 1 discloses a soil compactor configured as a so-called road roller, in which the compactor frame includes a main frame with a drive unit, an operating table, and drive wheels driven by the drive unit. A subframe is connected to the main frame and is rotatable around a pivot axis oriented primarily vertically. A compaction roller is supported on the subframe so as to be rotatable around a roller rotation axis extending substantially perpendicular to the longitudinal direction of the soil compactor, primarily in the transverse direction of the soil compactor. A soil radar moisture measuring device is supported on the bottom surface of the main frame so as to protrude downward in the vertical direction. The antenna of the soil radar moisture measuring device is positioned at a small distance from the soil whose moisture content is to be detected. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 229146 Brochure Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION It is an object of the present invention to provide a soil compactor with a soil radar density measuring device that is protected from external influences. [Means for solving the problem]

[0005] The present invention solves this problem by providing a soil compactor that includes at least one compaction roller rotatably supported on a compactor frame and at least one soil radar density measurement device disposed in an interior volume region of the compactor frame.

[0006] By arranging at least one soil radar density measurement device in the internal volume area of ​​the compactor frame, i.e., by arranging it so that it does not protrude outside the compactor frame, such soil radar density measurement device is attached to the soil compactor while being largely protected from external physical influences. Since obstacles that may collide with the soil compactor are often present in the area in which such soil compactors operate, damage to the soil radar density measurement device stored in this manner due to the obstacles colliding with the soil compactor can be avoided. For example, there is no risk of damage to the soil radar density measurement device stored in the soil compactor, even during cleaning work using a high-pressure washer.

[0007] The compactor frame can include a main frame and at least one subframe pivotally connected to the main frame about a steering axis, the main frame being provided with a drive device operable to drive the soil compactor, and the at least one subframe rotatably supporting a compaction roller.

[0008] Such a soil compactor may be configured as a so-called tandem roller having a compaction roller rotatably supported on a main frame and a compaction roller rotatably supported on a subframe, as a so-called road roller having a compaction roller rotatably supported on a subframe and drive wheels supported on the main frame, or as a so-called pivot-steering soil compactor in which two subframes configured as steering pivots are rotatably attached to the main frame and a compaction roller is rotatably supported on each subframe.

[0009] Furthermore, in such soil compactors, regardless of their structure, one or more compaction rollers may be configured to have roller shells, generally made of steel, on the main frame and / or at least one subframe as compaction rollers configured as continuous or segmented compaction rollers in the direction of roller rotation. Alternatively or additionally, in such soil compactors, one or more compaction rollers may each be configured with multiple rubber-tired rollers arranged consecutively in the direction of roller rotation.

[0010] For the pivotable connection, at least one sub-frame can include a cross beam extending laterally of the soil compactor, the sub-frame being pivotally connected to the main frame in the region of the cross beam.

[0011] At least one soil radar density measuring device may be arranged in the subframe interior volume area of ​​the cross beam, which may be configured as a hollow beam or a hollow profile beam to provide the subframe interior volume area.

[0012] In particular, when the soil compactor is configured as a tandem roller or a road roller, the at least one subframe can include a further cross beam extending primarily in the transverse direction of the soil compactor, spaced apart from the cross beam in the longitudinal direction of the soil compactor, spaced apart from each other in the transverse direction of the soil compactor and connected to the cross beam by two longitudinal beams extending primarily in the longitudinal direction of the soil compactor, the compaction roller being rotatably supported on the longitudinal beams. At least one soil radar density measuring device can be arranged in the subframe interior volume area of ​​the further cross beam and / or in the subframe interior volume area of ​​the at least one longitudinal beam.

[0013] It may also be provided that the further transverse beam or / and at least one longitudinal beam is formed as a hollow beam or hollow profile beam in order to provide an internal volume area of ​​the subframe.

[0014] If the soil compactor includes two subframes formed as steering pivots connected to the main frame so as to be rotatable about respective steering axes, at least one soil radar density measuring device may be arranged in the subframe internal volume area of ​​at least one subframe formed as a steering pivot.

[0015] In another embodiment of the soil compactor according to the present invention, the main frame can have a main frame interior volume region that contains the drive device and at least one soil radar density measurement device.

[0016] The main frame may be provided with at least one, preferably closable, inspection opening for performing maintenance work on the drive unit or on auxiliary equipment supported on the main frame in association with the drive unit. In this case, the at least one soil radar density measurement device is preferably arranged such that each soil radar density measurement device arranged in the main frame's internal volume area is accessible through at least one inspection opening. This means that the soil radar density measurement devices arranged in this manner can be maintained and, if necessary, replaced through the inspection opening.

[0017] In order to ensure that one or more soil radar density measuring devices are stored in a vibration-protected manner within the compactor frame of the soil compactor, it is proposed that at least one, and preferably each, soil radar density measuring device includes a sensor support supported on the compactor frame by means of at least one elastically deformable suspension element, and at least one soil radar density sensor supported on the sensor support.

[0018] For stable retention on the compactor frame, at least one, and preferably each, soil radar density measuring device may be mounted on a plate-like support area of ​​the compactor frame.

[0019] Detection of soil present below or in the area of ​​the soil compactor by soil radar density measuring devices arranged in the internal volume area of ​​the soil compactor is made possible by providing a measurement opening in the compactor frame arranged in at least one, preferably each, soil radar density measuring device.

[0020] In order to be able to detect over a wide area the compaction state produced by the soil compactor of the soil to be compacted, it is proposed to provide at least one soil radar density measuring device arranged on at least one, preferably each, compaction roller in the longitudinal direction of the soil compactor, on both sides of the compaction roller, and / or to arrange at least two soil radar density measuring devices spaced apart from each other in the transverse direction of the soil compactor.

[0021] The invention will now be described in detail with reference to the accompanying drawings, in which: [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a top view showing a schematic diagram of a soil compactor configured as a tandem roller; FIG. [Figure 2] FIG. 1 is a schematic diagram illustrating a soil radar density measurement device disposed in an interior volume region of a soil compactor. [Figure 3] FIG. 1 is a side view of a soil compactor configured as a road roller. [Figure 4] FIG. 1 is a side view of a compact roller configured as a tandem roller. [Figure 5] FIG. 1 is a side view schematically illustrating a steering pivot type soil compactor. DETAILED DESCRIPTION OF THE INVENTION

[0023] The soil compactor 10 shown in Figure 1 includes a compactor frame, generally designated 12, having a main frame 14 and a sub-frame 16 connected to the main frame 14 so as to be pivotable about a steering axis A that is generally perpendicular to the plane of projection of Figure 1. A compaction roller 18 is rotatably supported on the main frame 14 about a roller rotation axis that extends in a lateral direction Q of the soil compactor and is generally perpendicular to the longitudinal direction L of the soil compactor. A compaction roller 20 is rotatably supported on the sub-frame 16 about a roller axis that also extends primarily in the lateral direction Q of the soil compactor and is perpendicular to the longitudinal direction L of the soil compactor.

[0024] A drive unit 22, which may be an internal combustion engine or an electric motor, is supported on the main frame 14 and supplies drive energy for operating the soil compactor 10. Furthermore, the main frame 14 is provided with an operation console 24 for an operator to operate the soil compactor 10.

[0025] The subframe 16 includes a transverse beam 26 extending primarily in the transverse direction Q of the soil compactor, through which the subframe 16 is pivotally connected to the main frame 14. A further transverse beam 28 is disposed in the longitudinal direction L of the soil compactor so as to extend spaced apart from and generally parallel to the transverse beam 26, and the further transverse beam 28 is connected to the transverse beam 26 by two longitudinal beams 30, 32 extending primarily in the longitudinal direction L of the soil compactor and spaced apart from each other in the transverse direction Q of the soil compactor, so that the subframe 16 substantially completely surrounds the compaction roller 20 rotatably supported on the longitudinal beams 30, 32. At least one of the two transverse beams 26, 28 and / or the at least one longitudinal beam 30, 32 is formed as a hollow beam, and therefore a subframe internal volume region N in which at least one soil radar density measurement device 34 is arranged is defined. VISuch a soil radar density measurement device 34 can be used to scan the ground or substrate passed over by the soil compactor 10, thereby generating information representative of its compaction state or density and making it available for further evaluation.

[0026] For example, a soil radar density measurement device 34 disposed on the cross beam 26 of the subframe 16 is shown in FIG. 2. A measurement opening 40 is formed in a plate-shaped region 38 of the cross beam 26, which is formed as a hollow beam and faces the ground 36 to be compacted or has been compacted. Through this opening, a measurement technique can access the portion of the ground 36 below this region of the subframe 16. The soil radar density measurement device 34 includes, for example, a plate-shaped sensor support 42. In the illustrated embodiment, a soil radar density sensor 44 is supported on the sensor support 42 with its measurement observation region 46 facing downward toward the ground 36 through the measurement opening 40. To protect the soil radar density sensor 44 from vibrations or other shocks, the sensor support 42 is supported on the cross beam 26 or its plate-shaped region 38 via a plurality of elastic suspension elements 48 made of, for example, a rubber material.

[0027] In particular, it is advantageous to provide at least one such soil radar density measuring device 34 on each side of the compaction roller 20 in the longitudinal direction L of the soil compactor, in order to be able to detect changes in the compaction state of the ground 36 produced by the compaction roller 20. This means that such soil radar density measuring devices 34 can also be provided on further cross beams 28 that are arranged at a greater distance from the main frame 14, for example in the manner shown in FIG.

[0028] It is further advantageous to provide soil radar density measuring devices 34, which are spaced apart from one another in the transverse direction Q of the compactor, for example on the cross beams 26 and / or the further cross beams 28, in order to provide information about the compaction state across the width of the ground that has been passed, i.e. in the transverse direction Q of the compactor.

[0029] Instead of, or in addition to, providing one or more soil radar density measuring devices 34 on one or both of the cross beams 26, 28, one or more density measuring devices may also be provided on the longitudinal beams 30, 32, particularly if the longitudinal beams 30, 32 are configured as hollow beams.

[0030] Instead of or in addition to providing one or more soil radar density measuring devices 34 on the subframe 16, one or more such soil radar density measuring devices 34 can also be provided on the main frame 14. For example, one or more soil radar density measuring devices 34 can be housed in the cross beams 26 of the main frame 14. It is particularly advantageous to arrange such soil radar measuring devices 34 in the area of ​​an inspection opening 54 of the main frame 14 that can be closed by a plate-shaped closing element 52, through which the drive unit 22 or the main frame internal volume area H VI For example, such a soil radar density measuring device 34 provided in the area of ​​the access hatch 54 can be positioned on the bottom plate of the main frame 14 so as to face the ground to be compacted or the ground that has already been compacted, as shown in FIG.

[0031] The internal volume area VI of the soil compactor 10, i.e., the subframe internal volume area N VI or / and main frame internal volume area H VI 2, storing one or more soil radar density measuring devices 34 in a location that is protected from external influences is ensured, and in particular the positioning of the soil radar density measuring devices 34 as shown in FIG. 2 ensures reliable and accurate detection of the ground conditions.

[0032] 3 shows a soil compactor 10 configured as a road roller, which has a main frame 14, commonly referred to as a rear body, and a subframe 16, commonly referred to as a front body. The main frame 14 and the subframe 16 are connected to each other so as to be rotatable about a steering axis A. The main frame 14 houses a drive unit 22 and an operation console 24. Furthermore, the main frame 14 is provided with two drive wheels 56 that are rotated by the drive unit 22 and can be driven to move the soil compactor 10 forward.

[0033] The subframe has two cross beams 26, 28 and connecting longitudinal beams 30, 32, which enclose a compaction roller 20 rotatably supported on the subframe 16.

[0034] As shown in Figure 3, for example, one or both of the cross beams 26, 28 may house one or more soil radar density measurement devices 34 in the manner already described in connection with Figure 2. If the longitudinal beams 30, 32 are configured as hollow beams, then alternatively or additionally, one or more soil radar density measurement devices 34 may be housed in the longitudinal beams 30, 32. The main frame 14 may also be provided with one or more soil radar density measurement devices 34, for example arranged in its tail region, or with soil radar density measurement devices 34 spaced apart from one another in the longitudinal direction L of the soil compactor.

[0035] A further embodiment of the soil compactor 10 is shown in Figure 4. The soil compactor 10 of Figure 4 is essentially configured as a tandem roller having two compaction rollers 18, 20. The compaction roller 20 is supported on a main frame 14, which also supports a drive unit 22. The compaction roller 20 is supported on a subframe 16 having an operating platform 24. The main frame 14 and the subframe 16 are supported relative to each other so as to be rotatable about a steering axis A. One or more soil radar density measurement devices 34 may be supported on the main frame 14 and / or the subframe 16, for example, on each bottom plate, as shown in Figure 2. Also, for example, the main frame 14 may have a main frame internal volume area H VI Additionally, one or more soil radar density measuring devices 34 may be positioned on the main frame 14 in front of the compaction roller 18 so as to be directed diagonally forward toward the ground, thereby detecting the compaction state before or after the soil compactor 10 passes over the ground, depending on the direction of movement. A similar arrangement is possible on the subframe 16.

[0036] 5 shows a pivot-steering soil compactor 10 in which two sub-frames 16, 16' formed as steering pivots are supported on a main frame 14 for rotation about respective steering axes A, A'. A compaction roller 20, 20' is rotatably supported on each sub-frame 16, 16' formed as a steering pivot. The main frame internal volume area H VI and each subframe internal volume area N of the subframes 16, 16' VI may house one or more soil radar density measurement devices 34 so as to measure the ground beneath the soil compactor 10 through each measurement opening and provide information regarding its compaction state or density.

[0037] Finally, it should be noted that if the above-described soil compactor 10 is provided with multiple soil radar density measurement devices 34, the soil radar density measurement devices 34 can be stored in any of the locations already described and shown in the drawings. In this regard, it is particularly advantageous if at least two soil radar density measurement devices 34 are arranged at a distance from one another in the longitudinal direction L of the soil compactor, whereby, for example, soil radar density measurement devices 34 are arranged on both sides of the compaction rollers 18, 20 in the longitudinal direction L of the soil compactor, or / and at least two soil radar density measurement devices 34 are arranged at a distance from one another in the transverse direction Q of the compactor. For example, when two soil radar density measurement devices 34 are used, one of these soil radar density measurement devices 34 in the cross beam 26 may be positioned in the region of the longitudinal end in the lateral direction of the soil compactor, while the other soil radar density measurement device 34 in the further cross beam 28 is positioned in the region of the other longitudinal end, i.e., on or near the other side of the soil compactor 10 in the lateral direction Q of the soil compactor. [Explanation of symbols]

[0038] 10 Soil Compactor 12 Compactor Frame 14 Mainframe 16, 16' subframe 18, 20, 20' Compaction Roller 22 Drive unit 24 Control console 26, 28 crossbeam 30, 32 Longitudinal beams 34 Soil Radar Density Measuring Device 36 Ground 38 Plate-like region 40 Measurement aperture 42 Sensor support 44 Soil Radar Density Sensor 46 Measurement and observation area 48 Suspension element 52 Closure elements 54 Inspection hatch 56 Drive wheels A, A' steering axis H VI Mainframe internal volume area L Longitudinal direction of soil compactor N VI Subframe internal volume area Q Soil compactor lateral direction VI. Internal volume area of ​​soil compactor 10

Claims

1. A soil compactor including at least one compaction roller (18, 20) rotatably supported on a compactor frame (12) and at least one soil radar density measurement device (34) disposed in an interior volume region (VI) of the compactor frame (12).

2. 2. The soil compactor of claim 1, wherein the compactor frame (12) includes a main frame (14) and at least one sub-frame (16) pivotally connected to the main frame (14) about a steering axis (A), the main frame (14) is provided with a drive device (22) that operates to drive the soil compactor (10), and the at least one sub-frame (16) rotatably supports a compaction roller (20).

3. 3. The soil compactor according to claim 2, characterized in that at least one subframe (16) includes a cross beam (26) extending in the transverse direction (Q) of the soil compactor, said subframe (16) being pivotally connected to the main frame (14) in the region of said cross beam (26).

4. The subframe internal volume area (N ＶＩ 4. The soil compactor according to claim 3, characterized in that at least one soil radar density measuring device (34) is arranged in the

5. The cross beam (26) defines the subframe internal volume area (N ＶＩ 5. The soil compactor according to claim 4, characterized in that it is formed as a hollow beam for supplying the soil.

6. At least one sub-frame (16) includes a further cross beam (28) extending primarily in the transverse direction (Q) of the soil compactor, connected to the cross beam (26) by two longitudinal beams (30, 32) spaced apart from each other in the transverse direction (Q) of the soil compactor and extending primarily in the longitudinal direction (L) of the soil compactor, the further cross beam (28) being spaced apart from the cross beam in the longitudinal direction (L) of the soil compactor, the compaction roller (20) being rotatably supported on the longitudinal beams (30, 32), and a sub-frame internal volume area (N ＶＩ ) or / and the subframe internal volume area (N ＶＩ 6. A soil compactor according to claim 3, wherein at least one soil radar density measuring device (34) is arranged in said first compactor.

7. Further transverse beams (28) or / and at least one longitudinal beam (30, 32) define the subframe interior volume area (N ＶＩ 7. The soil compactor according to claim 6, characterized in that it is formed as a hollow beam for supplying the soil.

8. Two sub-frames (16, 16') formed as steering pivots are connected to the main frame (14) so ​​as to be pivotable about respective steering axes (A, A'), and a sub-frame internal volume area (N) of at least one of the sub-frames (16, 16') formed as a steering pivot is ＶＩ 4. The soil compactor according to claim 3, characterized in that at least one soil radar density measuring device (34) is arranged in the compactor.

9. The main frame (14) defines a main frame interior volume area (H) containing a drive unit (22) and at least one soil radar density measurement device (34). ＶＩ 9. The soil compactor according to claim 2, further comprising a suction chamber.

10. The main frame (14) is provided with at least one preferably closable access door (54), and the main frame internal volume area (H ＶＩ 10. The soil compactor according to claim 9, characterized in that at least one, preferably each, soil radar density measuring device (34) arranged on the soil compactor is accessible via at least one said inspection hatch (54).

11. 11. A soil compactor according to any one of claims 1 to 10, characterized in that at least one, and preferably each, soil radar density measurement device (34) comprises a sensor support (42) supported on the compactor frame (12) by means of at least one elastically deformable suspension element (48), and at least one soil radar density sensor (44) supported on the sensor support (42).

12. 12. A soil compactor according to any one of claims 1 to 11, characterized in that at least one, preferably each, soil radar density measuring device (34) is supported on a plate-shaped support area (38) of the compactor frame (12).

13. 13. The soil compactor according to any one of claims 1 to 12, characterized in that a measurement opening (40) is provided in the compactor frame (12) for at least one, preferably each, soil radar density measuring device (34).

14. 14. The soil compactor according to claim 1, wherein at least one soil radar density measuring device (34) is provided on at least one, preferably each, compaction roller (18, 20) on both sides of the compaction roller (18, 20) in the longitudinal direction (L) of the soil compactor, and / or at least two soil radar density measuring devices (34) are arranged at a distance from each other in the transverse direction (Q) of the soil compactor.

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