WO2013068396A1

WO2013068396A1 - Roller casing segment for a roller casing for a compacting roller

Info

Publication number: WO2013068396A1
Application number: PCT/EP2012/072026
Authority: WO
Inventors: Werner WEIHS
Original assignee: Hamm Ag
Priority date: 2011-11-09
Filing date: 2012-11-07
Publication date: 2013-05-16
Also published as: CN203105152U; DE102011085991A1

Abstract

The invention relates to a roller casing segment for a roller casing for a compacting roller of a preferably self-propelled compactor, in particular for compacting harvested material or silage material. The roller casing segment comprises a curved casing segment shell (30) with a roller system face (34) and a compacting face (32). A plurality of tamping feet (36) are provided on the compacting face (32) of the casing segment shell (30), and the compacting face (32) of the casing segment shell (30) and/or the tamping feet (36) are at least partly coated with a coating material (64).

Description

Roll shell segment for a roll shell for a compressor roll

The present invention relates to a roll shell segment for a roll shell for a compressor roll of, for example, a self-propelled compressor and to a roll shell constructed with a plurality of roll shell segments of this type and a compressor equipped therewith.

For compacting loose soil material, generally self-propelled compactors with at least one compressor roller are used. The compactor roller is assigned a vibrating drive in order to vibrate it in compressor operation and thus to achieve improved compaction of the material to be compacted. While compacting rollers with a substantially smooth roller or drum surface are used for compacting gravel or asphalt, highly structured roller surfaces are used for compacting soil, for example produced by providing a multiplicity of pad feet on the side or surface intended for compaction ,

It has been found that such compressor rollers equipped with a plurality of tamping feet can also be used for compacting crop material or silage material, which is stored, for example, in so-called driving or flat silos. These running or flat silos are generally constructed with concrete material, whereby there is a risk of damage to the silo and / or the compressor roller when using a compressor with at least one compressor roller in principle. It is the object of the present invention to provide a roll shell segment for a roll shell for a compacting roll and a roll shell comprising a plurality of roll shell segments, which has improved usability in connection with compaction of crop or silage material has.

According to the invention this object is achieved by a roll shell segment for a roll shell for a compressor roll of a preferably self-propelled Vedichters, in particular for compacting crop or silage material, comprising a curved shell segment shell with a roll plant side and a compression side, wherein on the compression side of the shell segment shell a plurality of stamp feet is provided and wherein the compression side of the shell segment shell or / and the tamping feet are at least partially coated with coating material.

By coating a roll shell segment on its side provided with a covering material in contact with the material to be compacted or the substrate on which such material is stored, various effects which are advantageous in the compression operation can be achieved. On the one hand, of course, the coating material protects the compactor roller in contact with, for example, a very hard substrate and also in contact with the material to be compacted, in particular against adherence thereof to the compactor roller. On the other hand, the coating material can of course also provide a protective effect for the substrate receiving the material to be compressed, for example a concrete floor. In order to avoid the occurrence of local impairments in the rotary operation of a compacting roller, it is proposed that the covering material substantially cover the entire surface of the casing segment shell, which is not covered by stamping feet, on the compression side. Since it is generally assumed that the surface of the shell segment shell can not come into direct contact with the substrate receiving the material to be compacted, since this contact will generally occur in the area of the stamp feet, this will in particular result in improved protection against sticking of material to be compacted in reaches an area between adjacent tamping feet.

It is advantageously provided that a thickness of the coating material is on the surface of the shell segment shell on the compression side in the range of 3 to 4 mm. Since in the region of the surface of the shell segment shell on the compression side generally no contact with a comparatively hard surface will arise, here can provide a relatively thin coating with the coating material for adequate protection in particular against adhesion of the material to be compacted.

Furthermore, it can advantageously be provided that the covering material covers substantially the entire surface of the stamp feet. Here, of course, with the surface of the stamp feet that surface is addressed, which can come into contact with the material to be compacted or the receiving this underground. The surface of the stamp feet which, for example, is in contact with the surface of the casing segment shell or facing it, is in this sense not to be regarded as a surface coated or to be coated with compacting material. It should also be pointed out that the surfaces of all tamping feet are advantageously covered with the covering material, with the basic rule that individual tamping feet or groups of tamping feet arranged in special areas are not or only partially covered with the covering material, depending on the type of use.

The thickness of the coating material on a padfoot surface of the tamping feet may be in the range of 8 to 12 mm, preferably about 10 mm. The tamp foot surface of the tamping feet is that surface which faces away from the surface of the shell segment shell on the compression side and can also come into contact with the optionally comparatively hard ground on which the compacting roller moves in compacting operation and thus exposed to comparatively heavy loads is or the background relatively heavily loaded. Here it is advantageous to provide a coating with a greater thickness of the coating material, since a comparatively strong wear or abrasion of the coating material is to be expected. A thickness of the coating material on a padfoot peripheral inclined surface may be in the range of 3 to 12 mm, preferably 3 to 10 mm.

The thickness of the coating material on a padfoot side surface may be in the range of 5 to 7 mm.

In particular, when the thickness of the coating formed with the coating material on the surface of the casing segment shell is smaller than the thickness of the coating on a padfoot base surface, it is proposed that a thickness of the coating material on a padfoot circumferential inclined surface and / or The padfoot side surface increases from an area adjacent to the compaction side of the shell segment shell to an area adjacent to a stem foot surface. As a result, for example, a gradual adaptation of the thickness of the coating can be achieved without the occurrence of critical levels of wear and sticking.

The cover material may comprise elastic plastic material, preferably polyurethane material. In order to be able to connect roll shell segments to each other to provide a roll shell which is generally cylinder-like, it is proposed that a connection formation for firmly connecting the roll shell segment to another roll shell segment is provided on a connection edge region to be positioned adjoining another roll shell segment. A closed formation of tamping feet on a roll shell comprising a plurality of roll shell segments can be achieved by virtue of the fact that the connection formation has at least one joining projection, preferably joining tuft. foot, with a connecting-member through-hole.

A stable connection of the roll shell segments by connecting members, such as bolts, can be ensured that no coating material is provided in the Verbindungsorgandurchgriffsaussparung.

The invention further relates to a roll shell for a compressor roll of a preferably self-propelled compressor, in particular for compaction of crop or silage material, comprising a plurality of roll shell segments according to the invention.

Furthermore, the invention relates to a compressor, preferably self-propelled, in particular for compacting crop or silage material comprising at least one compressor roller and in association therewith at least one roller shell according to the invention.

The invention will be described in detail below with reference to the accompanying figures. It shows:

Figure 1 is a side view of a self-propelled compressor with a compressor roller.

FIG. 2 is a perspective view of a roll shell segment of a roll shell for the compressor roll of the compressor of FIG. 1; FIG. in an enlarged view a part of the roll shell segment of Fig. 2; Fig. 4 in a different perspective view of that shown in Fig. 3

Part of a roll shell segment;

Fig. 5 is a circumferential sectional view of the roll shell segment of Fig. 2, taken along a circumferential line VV in Fig. 2;

Fig. 6 is a sectional view of a padfoot on a shell segment shell, cut along a circumferential line Vl-Vl in Fig. 2;

7 is a sectional view of a padfoot on a shell segment shell, cut along a lying transversely to the circumferential direction line VII-VII in Fig. 3rd

In Fig. 1, a denoted by 10 soil compactor, also commonly referred to as a compressor roller shown. The soil compactor 10 comprises a rear vehicle area 12, on which a drive unit (not shown), a driver's cab 14 and wheels 16 driven for propulsion by the drive unit are provided. A front vehicle area 18 is pivotably connected to the rear vehicle area 12, wherein the direction of travel and thus also the working direction can be influenced by pivoting the front vehicle area 18 with respect to the rear vehicle area 12 about a substantially vertical pivot axis.

At the front vehicle area 18, a compressor roller 20 is provided. This may be associated with a vibration or vibration drive, not shown, in order to put the compressor roller 20 into vibration during the advancing movement of the soil compactor 10 and thus to influence the compression behavior. The compressor roller 20 comprises a jacket 22, which is generally also referred to as a smooth bandage and whose surface 24, which is exposed to the outside, is in contact with the substrate 26 to be compacted.

It should be noted here that the recognizable in Fig. 1 structure of a self-propelled soil compactor 10 is only an example. This could be varied in various aspects. Thus, instead of the wheels 16, a further compression roller 16, which can be driven for propulsion, could be provided on the rear drive train. be provided 12 generating area. Also, two adjacent compressor rolls could be positioned at the front and / or rear of the vehicle. In order to be able to use the soil compactor 10, in particular also for compacting crop material or silage material, for example in a silo, the compactor roller 20 can be surrounded by a roll shell constructed with a plurality of roll shell segments 28 described in detail below with reference to FIGS. 2 to 7.

Such a roll shell segment 28 is shown in Fig. 2 in a perspective view. It comprises a substantially cylindrically curved shell segment shell 30. A side of the shell segment shell 30 lying outside on the convex side forms a compacting side 32, while the other side, ie the concave side of the shell segment shell 30 located on the inside, forms a roll contact side 34 forms, with which the roll shell segment 28 can be positioned adjacent to the surface 24 of the compacting roll 20. A circumferential extent of the shell segment shell 34 measured with respect to a central axis, which also essentially corresponds to the axis of rotation of the compactor roller 20, can be in the region of approximately 120 °, so that a total of three such roll shell segments 28, which are preferably identically constructed, have a roll shell completely surrounding the compactor roll 20 provide.

At the compression side 32 of the shell segment shell 30, a plurality of built-up, for example, solid metal material stamp feet 36 is provided. These have a matching to the curvature of the shell segment shell on the compression side 32 connecting side on which they can be firmly connected, for example, by welding with the shell segment shell 30. The stamp feet 36 may be arranged in a circumferentially successive arrangement a plurality of hen provide the stamp feet in immediately adjacent rows can be offset from each other in the circumferential direction.

At the joining edge regions 38, 40 delimiting the roll shell segment 28, the shell segment shell 30 is formed with step-like return / projection regions 42, wherein the back / projection regions 42 formed on the two connection edge regions 38, 40 are complementary to each other, so that roll shell segments 28 constructed identically to one another adjoin one another can be joined. In this connection edge regions 38, 40 six connecting tamping feet 44 of a connection formation, generally designated 46, are provided in the illustrated example. The connecting tamping feet 44 can be provided, for example, by stamping feet 36 halved in the circumferential direction, so that in each case two connecting tamping feet 44 of two roll shell segments 28 positioned directly adjacent to each other result in a tamping foot 36 in their entirety and thus a circumferentially circulating uniform arrangement of stamp feet arranged in rows, for example 36 is obtained. In the compound tamping feet 44, connection-body penetration recesses 48 are provided. As can be seen in FIG. 5, these connecting-holes can be provided through openings of stepped cross-section so that connecting members provided by bolts, for example, can be inserted therein and circumferentially supported on the step portions to thereby be in communication with nuts or the like to achieve a fixed connection of immediately adjacent roll shell segments 28.

The stamp feet 36 facing away from their connection side, ie on their side facing away from the shell segment shell 30 side, a padfoot base 50 on. When moving on a solid surface, for example a concrete floor, essentially only this pad foot foot surface 50 will come into contact with the ground. In the circumferential direction the tamping feet 36 are limited by padfoot circumferential inclined surfaces 52, 54. These extend from a region 56 positioned adjacent to the compaction side 32 of the shell segment shell 30 towards one another to a region 58 adjoining the padfoot base surface 50, so that the shape of the stamping feet tapering in side view in the direction of the padfoot base surface 50 36 is obtained. In the lateral direction, the tamping feet 36 are delimited by padfoot side surfaces 60, 62, which, as FIG. 7 illustrates, can also be tapered towards the tamp foot surface 50, but with a significantly smaller taper angle than is the case with the padfoot peripheral ramps 52, 54. In order to avoid sharp-edged areas, preferably the transitions of the padfoot circumferential inclined surfaces 52, 54 to the padfoot side surfaces 60, 62 and also to the padfoot base 50 are rounded, as are the transitions of the padfoot lateral surfaces 60, 62 to the padfoot. Foot area 50.

The roll shell segment 28 is preferably coated with a coating of coating material 64 on its entire surface coming into contact with the material to be compacted. The cover material 64 is preferably polyurethane-based as a two-component, solvent-free PUR liquid plastic to produce a rubber-elastic coating on the roll shell segment 28. This coating may preferably be applied by a hot spraying method either manually or by machine. After cooling, this coating material 64 may have a Shore A hardness in the range of about 85 ° and a tensile strength of about 12 N / mm ² . The elongation at break can be about 500%.

This elastic covering material 64 on the one hand provides protection for the roll shell segment 28 or the roll shell per se in contact with very hard ground, for example concrete substrate, but also protects the substrate from damage by the stamp feet 36 during the advancing movement of the compressor 0 further advantageous The aspect of such a coating is that the adhesion of material to be compacted, in particular when it comes to crop or silage material, is made more difficult. A thickness Di of the coating material 64 on a surface 66 of the shell segment shell 30 not covered by stamp feet 36 may be in the range of 3 to 4 mm. This comparatively small thickness is sufficient to prevent the adhesion of material to be compacted in this area with sufficient stability of the coating. A thickness D _{2 of} the coating material 64 in the area of the padfoot foot surface 50 is advantageously about 10 mm and is thus significantly larger than in the region of the surface 66. This has the advantage that where the stamp feet 36 in the Compressor the greatest burden will occur, namely where a direct contact with a comparatively hard underground, such. As concrete substrate, may arise, can be counteracted by the greater thickness of the coating material 64 occurring there wear or abrasion or the time until re-coating material 64 must be applied, can be stretched. A thickness D ₃ of the coating material 64 in the region of the padfoot circumferential oblique surfaces 52 to 54 is advantageously in a range of 3 to 10 mm. As FIG. 6 makes clear, the thickness of the coating material 64, starting from the area 56 adjoining the surface 66 to the area 58 adjoining the padfoot foot area 50, can increase continuously here, for example, in the respective abutment areas 56 58 to be able to provide approximately the same thickness as in the area of the surface 66 or the padfoot foot surface 50. In this way, step-like thickness changes can be avoided.

A thickness D ₄ on the padfoot side surfaces 60, 62 may be in the range of 5 to 7 mm. Because of the lower inclination, that is, an orientation substantially orthogonal to the surface 66, here the coating material 64 is loaded only comparatively low, it may be thinner or be formed with approximately constant thickness. In principle, a thickness variation would also be possible in the sense described above with respect to the padfoot circumferential inclined surfaces 52, 54.

Since the various surfaces of the tamping feet 66 preferably merge into one another, when the coating material 64 is applied in a spraying process, a rounded transition between the various regions thereof will advantageously result in the coating material 64 as well, so that sharp-edged areas susceptible to wear are fundamentally avoided.

In order not to impair the stability of the connection between adjacent roll shell segments 28, no covering material is provided in the region of the connecting member through-engagement recesses 48, in particular the inner surface of a preferably stepped opening which provides them, as FIG. 5 shows. The end faces 68 of the connecting tamping feet 44 facing each other are also not covered with covering material 64 in order to ensure a defined and stable abutment of the connecting tamping feet 44 on their end faces 68. Likewise, the end faces 70 of the shell segment shell 30 in the connecting edge regions 38, 40 and also between the peripheral edge regions 38, 40 extending end surfaces 72 are not coated with coating material, as well as the roll plant side 34. All this allows a not affected by the coating material 64 defined positioning The roll shell segments 28 with respect to each other and also with respect to the compressor roller 20. With a roll shell, which is constructed with a plurality of roll shell segments described above, a compactly constructed with a smooth surface compactor roller can be easily rebuilt to make them especially for compacting crop or to use silage material. It is understood that the number, the shape and the relative positioning of the stamp feet may differ from those described above. It is also to be understood that, although coating the entire surface of a roll shell segment with such coating material passing in contact with the material to be compacted is advantageous, regions of, for example, the surface of the roll segment shell or tamping feet or individual tamping feet need not be coated with the coating material ,

Claims

claims

Roll shell segment for a roll shell for a compressor roll of a preferably self-propelled densifier, in particular for compacting crop or silage material, comprising a curved shell segment shell (30) with a roll plant side (34) and a compression side (32), wherein at the compression side (32) of the shell segment shell (32). 30) a plurality of pad feet (36) is provided and wherein the compression side (32) of the shell segment shell (30) and / or the Stampffüße (36) at least partially coated with coating material (64).

Roll shell segment according to claim 1,

characterized in that the covering material (64) substantially covers all the surface (66) of the shell segment shell (30) not covered with stamp feet (36) on the compression side (32).

Roll shell segment according to claim 2,

characterized in that a thickness (Di) of the coating material on the surface (66) of the shell segment shell (30) at the compression side (32) is in the range of 3 to 4 mm.

Roll shell segment according to claim 1, 2 or 3,

characterized in that the coating material (66) covers substantially the entire surface of the stamping feet (36).

Roll shell segment according to one of claims 1 to 4,

characterized in that a thickness (D ₂ ) of the coating material (64) on a padfoot foot surface (50) is in the range of 8 to 12 mm, preferably about 10 mm.

6. roll shell segment according to one of claims 1 to 5,

characterized in that a thickness (D ₃ ) of the coating material (66) on a padfoot circumferential inclined surface (52, 54) in the range of 3 to 12 mm, preferably 3 to 10 mm.

Roll shell segment according to one of claims 1 to 6,

characterized in that a thickness (D ₄ ) of the coating material (64) on a padfoot side surface (60, 62) is in the range of 5 to 7 mm.

Roll shell segment according to one of claims 1 to 7,

characterized in that a thickness of the coating material (64) on a padfoot peripheral inclined surface (52, 54) or / and a padfoot side surface (60, 62) starting from an adjacent to the compression side (32) of the shell segment shell (30) area ( 56) to a region (58) adjacent a stem foot surface (50).

Roll shell segment according to one of claims 1 to 8,

characterized in that the coating material comprises elastic plastic material, preferably polyurethane material.

Roll shell segment according to one of claims 1 to 9,

characterized in that a connection formation (46) for fixed connection of the roll mantle segment (28) to a further roll mantle segment (28) is provided on an adjoining another roll shell segment (28) to be positioned connecting edge region (38, 40).

Roll shell segment according to claim 10,

characterized in that the connection formation (46) has at least one connection projection (44), preferably connection pestle foot (44), with a connection member via recess (48).

Roll shell segment according to claim 11,

characterized in that no coating material is provided in the connection member passage recess (48).

Roll jacket for a compressor roll of a preferably self-propelled compressor, in particular for compacting crop material or silage material, comprising a plurality of roll shell segments (28) according to one of the preceding claims.

Compressor, in particular for compacting crop material or silage material, comprising at least one compressor roller (20) and, in association with at least one compressor roller (20), a roller casing according to claim 12.