Abstract
The present invention relates to a rubber tire roller for ground compaction, comprising a machine frame and an operating platform and front and rear undercarriages supporting the machine frame, wherein the undercarriages each comprise at least one wheel. A fundamental idea of the present invention lies in viewing indentations that are open to the side.
Claims
1. A rubber tire roller for compacting a ground, comprising: a machine frame with an operating platform; and front and rear undercarriages supporting the machine frame, the front and rear undercarriages each comprising at least one wheel, wherein at least one first viewing indentation for the front undercarriage is configured in the machine frame, the at least one first viewing indentation is being configured to be open to one side over the entire length of the at least one first viewing indentation, wherein an outer wheel edge (A, B) of the front undercarriage and a tread of the at least one wheel of the front undercarriage can be viewed from the operating platform, and wherein the at least one first viewing indentation is configured in such a way that, when viewed in the forward direction, the at least one first viewing indentation initially broadens in the horizontal plane toward the middle of the machine and subsequently narrows again away from the middle of the machine.
2. The rubber tire roller according to claim 1, wherein first and second viewing indentations are configured, respectively, on each side of the rubber tire roller for the front undercarriage.
3. The rubber tire roller according to claim 1, wherein a third viewing indentation is configured in the machine frame for the rear undercarriage, wherein the third viewing indentation is configured to be open to one side over the entire length of the third viewing indentation and wherein both an outer wheel edge (C) of the rear undercarriage and a wheel tread of the at least one wheel of the rear undercarriage can be viewed from the operating platform through the third viewing indentation, and fourth viewing indentation is provided, which is configured to be open to one side over the entire length of the fourth viewing indentation and through which the wheel edge opposite the outer wheel edge (C) and a tread of a wheel of the rear undercarriage can be observed from the operating platform.
4. The rubber tire roller according to claim 3, wherein at least one of the first, second, third and/or fourth viewing indentations is limited in the forward direction (a) to the front and/or to the rear by side walls formed by the machine frame.
5. The rubber tire roller according to claim 4, wherein in relation to the forward direction (a), the front and rear side walls of the at least one viewing indentation formed by the machine frame extend parallel to one other.
6. The rubber tire roller according to claim 1, wherein the at least one viewing indentation is configured in such a way that a ground area lying in front of the rubber tire roller can be viewed by an operator on the operating platform through the at least one viewing indentation over the upper tread of a wheel.
7. The rubber tire roller according to claim 3, wherein the third and/or fourth viewing indentation for the rear undercarriage is limited in the forward direction (a) to the front by a side wall formed by the machine frame and is open to the rear relative to the forward direction (a).
8. The rubber tire roller according to claim 3, wherein at least one of the first, second, third and/or fourth viewing indentation extends through the machine frame until vertically over the wheels.
9. The rubber tire roller according to claim 1, wherein in relation to the forward direction (a), a hood and/or a tank is arranged on the machine frame in front of and/or behind the operating platform, and in that at least one of the first, second, third and/or fourth viewing indentations extend through the hood and/or the tank.
10. The rubber tire roller according to claim 1, wherein at least one viewing indentation undercuts the machine frame in such a way that the viewing indentation is configured to be partially limited to one side by the machine frame.
11. The rubber tire roller according to claim 3, wherein the undercarriages comprise several wheels spaced apart from one another transversely to the forward direction (a), wherein the wheels of the front undercarriage are arranged so as to be offset transversely to the forward direction (a) in relation to the wheels of the rear undercarriage and in the gaps of the latter, and in that the third viewing indentation for the rear undercarriage is directed to the wheel edge (C) that is offset outwards in relation to the front wheel edge (A, B).
12. The rubber tire roller according to claim 3, wherein the operating platform comprises support bars supporting a roof, and in that the support bars are arranged transversely to the forward direction (a) toward the middle of the machine in such a way that at least one of the first, second, third and/or fourth viewing indentations can be viewed by the driver of the rubber tire roller from the operating platform in an unobstructed manner.
13. The rubber tire roller according to claim 1, wherein at least one viewing indentation is configured to be open at the top.
14. The rubber tire roller according to claim 13, wherein a step for an operator is provided in the region of the viewing indentation configured to be open at the top.
15. The rubber tire roller according to claim 1, wherein in addition to the at least one viewing indentation a step recess is configured in the machine frame, which is configured to be open toward the inside of the at least one viewing indentation.
16. The rubber tire roller according to claim 1, wherein an access cover is arranged in at least one viewing indentation.
17. The rubber tire roller according to claim 1, wherein integrated transport loops for the suspension of the rubber tire roller are arranged in the side walls of the at least one viewing indentation formed by the machine frame.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In the following, the present invention is described in greater detail by means of the illustrative embodiments shown in the figures, which show schematically:
[0025] FIG. 1 is a side view of the rubber tire roller;
[0026] FIG. 2 is a top view on the rubber tire roller shown in FIG. 1;
[0027] FIG. 3 is the offset between the front and rear undercarriages of the rubber tire roller;
[0028] FIG. 4 is a side view of a viewing indentation for the front undercarriage;
[0029] FIG. 5 is a top view of a viewing indentation for the front undercarriage;
[0030] FIG. 6 is a side view of a viewing indentation for the rear undercarriage;
[0031] FIG. 7 is a top view of a viewing indentation for the rear undercarriage;
[0032] FIG. 8 is a perspective view of the rubber tire roller from the front left;
[0033] FIG. 9 is a perspective view of the rubber tire roller from the front right;
[0034] FIG. 10 is a front view of the rubber tire roller obliquely from the top; and
[0035] FIG. 11 is a rear view of the rubber tire roller obliquely from the top.
[0036] Components that are identical or have identical functions are designated with the same reference numbers. Repetitive components are not necessarily indicated separately in each figure.
DETAILED DESCRIPTION OF THE INVENTION
[0037] FIGS. 1 to 11 show a preferred illustrative embodiment of a rubber tire roller 1 according to the present invention. Generally, rubber tire rollers 1 comprise an operating platform 2 and a machine frame 3. During operation, the rubber tire rollers 1 are driven by a power source 4, mostly a diesel engine, and move alternately in the forward direction a or contrary to the forward direction a over the ground 8 by means of a driven front undercarriage 5 and a rear undercarriage 6. The undercarriages 5 and 6 respectively comprise four individual wheels arranged next to one another. Ideally, a driver's seat that is displaceable over the width of the platform is arranged on the operating platform 2. In FIG. 1, an approximate position of the FPCP in accordance with DIN ISO 5006:2017 is indicated for illustrative purposes.
[0038] In order to render the steering of the machine easier for the driver of the rubber tire roller 1, the embodiment of the rubber tire roller 1 shown comprises two viewing indentations 11 for the front undercarriage 5. More specifically, the machine frame 3 of the rubber tire roller 1 comprises a viewing indentation 11 through which, from the operating platform 2 of the rubber tire roller 1, the driver can view the wheel 9 located on the outer right, in particular its wheel edge A transverse to the forward direction a and tread. Moreover, the machine frame 3 of the rubber tire roller 1 comprises a further viewing indentation 11, through which the outer wheel arranged on the front left of the front undercarriage 5 can be viewed from the operating platform 2. Here as well, the outer wheel edge B located on the front left and the tread of the outer wheel 9 on the front left are visible for the driver from the operating platform 2. As can be seen, in particular, in FIG. 2, the viewing indentations 11 for the front undercarriage 5 are located on the opposite longitudinal sides of the machine frame 3 of the rubber tire roller 1 and essentially at the same position in the longitudinal direction or forward direction a of the rubber tire roller 1.
[0039] Furthermore, the rubber tire roller 1 comprises a third viewing indentation 18 for the rear undercarriage 6. Through the viewing indentation 18, the tread and the wheel edge C of the left outer rear wheel 10 is visible for the driver. The wheel edges A, B, C are thus the wheel edges located farthest away from the middle of the machine of the rubber tire roller 1 in a direction transverse to the forward direction a. As the driver of the rubber tire roller 1 is able to view these wheel edges A, B, C during operation, the rubber tire roller 1 can be steered particularly easily. Furthermore, the tread of the respective wheels 9, 10 can also be viewed via the viewing indentations 11, 18 so that the driver of rubber tire roller 1 can determine if ground material, in particular, e.g., asphalt, is adhering to the tread of the wheels 9, 10. In case material is actually sticking to the wheel tread, stripping devices 7 are provided, which can at least partially remove the adhering material from the wheel tread.
[0040] As a result, a total of three outer wheel edges A, B, C, and in part the corresponding wheel treads, can be viewed by the driver from the operating platform 2 by means of the exactly three viewing indentations 11, 18. The selection of the three wheel edges A, B, C from all four theoretically selectable wheel edges is described in further detail by means of FIG. 3. FIG. 3 schematically shows the positions of the front wheels 9 of the front undercarriage 5 relative to the rear wheels 10 of the rear undercarriage 6 in a top view. In the illustrative embodiment shown, the front undercarriage 5 comprises four front wheels 9 and the rear undercarriage 6 comprises four rear wheels 10. The front wheels 9 and the rear wheels 10 are respectively spaced apart from one another transversely to the forward direction a. The front wheels 9 are arranged in the gaps in relation to the rear wheels 10 transversely to the forward direction a. This means that the front wheels 9 are arranged at an offset transversely to the forward direction a with respect to the rear wheels 10 in such a way that the paths of the individual wheels respectively only overlap at their edges and that the a portion of the ground 8, when passed over once by the rubber tire roller 1, is essentially driven over by one wheel 9, 10 only, belonging either to the front undercarriage 5 or to the rear undercarriage 6. As the rubber tire roller 1 is typically steered by means of the front undercarriage 5, the wheel edges A, B arranged on the outside and transversely to the forward direction a are of particular importance for a precise control and steering of the rubber tire roller 1. Moreover, the wheel edge C of the left rear wheel 10 protrudes further outward transversely to the forward direction a than the wheel edge B of the outer left front wheel 9 as a result of the offset of the rear wheels 10 in relation to the front wheels 9 transversely to the forward direction a. The wheel edge C of the wheel 10 is thus located the farthest outwards on the rear undercarriage 6 transversely to the forward direction a and thus marks the outer limit of the overall path of the rubber tire roller 1 at the rear on the left. The wheel edge C of the rear undercarriage 6 is thus also of particular importance for steering the rubber tire roller 1, in particular for maneuvering the rubber tire roller 1 along a predefined path and/or along obstacles. The fourth wheel edge at the rear on the right, in contrast, is offset transversely to the forward direction a towards the middle of the machine in relation to the front outer right wheel edge A and thus automatically always lies within the overall path of the rubber tire roller 1. This wheel edge is thus less important for maneuvering or steering the rubber tire roller 1 and does not necessarily need to be viewable through a viewing indentation. The preferred embodiments of the present invention are thus limited to exactly three viewing indentations 11, 18, through which the specific wheel edges A, B, C are visible.
[0041] FIGS. 4 and 5 show a detailed illustration of a viewing indentation 11 for the front undercarriage 5 in accordance with the boxes IV and V indicated in FIGS. 1 and 2. The second viewing indentation 11, located at the front on the right in the forward direction a, is configured to be essentially identical to the viewing indentation 11 shown so that the indications given below also apply to the second viewing indentation 11 located at the front on the right on the rubber tire roller 1 in the forward direction a. FIG. 4 shows a side view of the viewing indentation 11, while FIG. 5 shows a top view. The viewing indentation 11 is formed by the machine frame 3. In particular, the viewing indentation 11 is formed as a recess in the machine frame 3. It extends continuously from the wheels 9 to the operating platform 2. The viewing indentation 11 ends vertically above the wheels 9, in particular in the wheel house of the wheels 9. The formulation that the viewing indentation 11 “runs continuously to the operating platform 2” means that there is no obstacle to impede a driver's view of the wheels 9 from the operating platform 2 (FPCP) through the viewing indentation 11 in a virtual extension of the viewing indentation 11 towards the operating platform 2, in particular along the viewing direction of a driver located on the operating platform 2. The viewing indentation 11 thus forms a free space between the operating platform 2 and the wheels 9, through which the driver can see the wheels 9 from the operating platform 2. The operating platform 2 does not have to be open in extension of the viewing indentation 11, but rather it is sufficient that the driver can look through the viewing indentation 11 from the operating platform 2, e.g., through a window or a front or rear windshield of the of the operating platform 2. The viewing indentation comprises a front lateral wall 22 located in the forward direction a in the front and a rear lateral wall 23 located in forward direction a in the rear. Moreover, the viewing indentation 11 is delimited by an inner wall 25 toward the middle of the machine, i.e., transversely to the forward direction a. Opposite the inner wall 25, the viewing indentation 11 is open towards the outer environment, in particular over its entire length. The front side wall 22, the rear side wall 23 and the inner wall 25 are respectively formed by or are a part of the machine frame 3. The front side wall 22 and the rear side wall 23 run in the direction of or parallel to the driver's viewing direction from the operating platform 2 when the latter, sitting, e.g., in the driver's seat, looks toward the wheels 9, which can be viewed through the viewing indentation 11. In particular, the front lateral wall 22 and the rear lateral wall 23 also extend parallel to one another, as shown in FIG. 4.
[0042] As shown in FIG. 5, the side walls 22, 23 of the viewing indentation 11 extend from a machine frame outer edge 21 to a machine frame inner edge 24 formed by the inner wall 25. The machine frame inner edge 24 and the machine frame outer edge 21 essentially extend parallel to the forward direction a as well as parallel to one another. The machine frame outer edge 21 constitutes the edge of the machine frame 3 located the furthest outwards, i.e., transversely to the forward direction a. In other words, the machine frame outer edge 21 of the machine frame 3 is located the furthest away from the center of the machine, in particular transversely to the forward direction a. The distance between the machine frame outer edge 21 and the machine frame inner edge 24 is the depth of viewing indentation 11. The depth of viewing indentation 11 is essentially defined by the extension of the side walls 22, 23 transverse to the forward direction a. The front side wall 22 and the rear side wall 23 can essentially extend in a direction transverse to the forward direction a. As indicated in FIGS. 4 and 5, the rear side wall 23 extends along the viewing direction of the driver and essentially transversely to the forward direction a. The front side wall 22, in contrast, extends not only transversely to the forward direction a, as is evident, in particular, in FIG. 5, but also toward the middle of the machine center and in the forward direction a. Side walls 22, 23 run from the machine frame outer edge 21 to the machine frame inner edge 24, which is essentially formed by the inner wall 25. As is evident from FIG. 5, the front side wall 22 extends obliquely between the machine frame outer edge 21 and the machine frame inner edge 24 in such a way that the viewing indentation is configured to widen from the machine frame outer edge 21 toward the machine frame inner edge 24 or from the outer side of the rubber tire roller 1 toward the middle of the machine. As a result of the extension of the front side wall 22 transverse to the forward direction a and in the forward direction a, an overhang of the machine frame 3 occurs in the area of the viewing indentation 11, the overhang being configured in such a way that the viewing indentation 11 is also at least partially limited by the machine frame 3 transversely to the forward direction and away from the center of the machine. In other words, the limitation is arranged in the region opposite the inner wall 25. However, it should be noted that this limitation does not close the opening of the viewing indentation 11 opposite the inner wall 25 toward the external environment. As a result of this special arrangement of the machine frame 3 in the region of the viewing indentation 11, construction space is saved while a visually appealing design of the viewing indentation 11 is attained.
[0043] It is thus important that the width B of the rubber tire roller in a virtual horizontal reference plane transverse to the direction of travel a is smaller in the area of the viewing indentation 11 (width B1) than it is before (width B2) or after (width B3) the viewing indentation 11 in the direction of travel. The viewing indentation thus does not constitute a tapering off of the machine in the forward or rearward direction, as is the case, e.g., with the lateral recess 18 described below in greater detail. Rather, the viewing indentation 11 has a front and a rear delimiting wall in the direction of travel, which extend at least obliquely in relation to the direction of travel. The machine is thus narrower with respect to its horizontal width, when viewed in the direction of travel, over the viewing indentation 11 in relation to the starting width before the area of the viewing indentation, and subsequently broader, in the present case as wide as before the indentation.
[0044] In this context, FIG. 2 makes it clear that the viewing indentation recesses from a maximal outer side wall extension far enough toward the middle of the machine that more than half and in particular more than two-thirds of the tread width of the rubber tire on the outer, right-hand side is visible.
[0045] FIGS. 6 and 7 show a side view and a top view of the viewing indentation 18 of rubber tire rollers 1 in accordance with the boxes VI and VII shown in FIGS. 1 and 2. The statements regarding the viewing indentation 11 in accordance with FIGS. 4 and 5 also apply to the viewing indentation 18 so that below mainly the differences between viewing indentation 18 and viewing indentation 11 are elucidated. The viewing indentation 18, like the viewing indentation 11, is located between a machine frame outer edge 21 and a machine frame inner edge 24. The viewing indentation 18 for the rear undercarriage 6 also comprises an inner wall 25 and a front lateral wall 22, both of which being formed by the machine frame 3. In contrast to the viewing indentation 11, the viewing indentation 18 does not have a rear side wall 23, but rather is configured to be open to the rear vis-à-vis the forward direction a. This means that the rear of the machine frame 3, in relation to the forward direction a, ends, in particular, in the upper region at the level of the machine frame inner edge 24. The front side wall 22 of viewing indentation 18 extends from the machine frame outer edge 21 to the machine frame inner edge 24, in particular in such a way that the front side wall 22 of the machine frame outer edge 21 extends transversely to the forward direction a and opposite the forward direction a to the machine frame inner edge 21. This way, there is no overhang of the machine frame 3 at the viewing indentation 18, while construction space is nevertheless saved. As is evident, in particular, from FIG. 1, the front side wall 22 has the same angle in the vertical plane as the rear side wall 23 and the front side wall 22 of the viewing indentations 11 for the front undercarriage 5. In particular, the values of the respective angles of the side walls 22, 23 in relation to a vertical plane correspond, while the extension of the side walls 22, 23 of the front viewing indentations 11 and thus also their angles relative to a vertical plane, mirror the extension and the angle in the vertical plane of the rear viewing indentation 18.
[0046] The machine frame 3 of the rubber tire roller 1 includes a front hood 19 in the forward direction a and a rear hood 20 in the forward direction a. The front hood 19 and the rear hood 20 are configured, e.g., as pivotable hoods 19, 20, which can be swiveled about a pivot axis in order to render devices mounted in the machine frame accessible for maintenance purposes. As is evident, in particular, from FIG. 2 and FIGS. 10 and 11, the viewing indentations 11, 18 continue into the hoods 19, 20. In particular, the machine frame 3 or its hoods 19, 20 of the rubber tire rollers 1 are configured in such a way that the front side wall 22, the rear side wall 23 and the inner wall 25 of the viewing indentations 11, 18 continue into the hoods 19, 20 without causing a change in the cross section or cross-sectional profile of the viewing indentations 11, 18 in the driver's viewing direction. The hoods 19, 20 are thus also configured to permit an operator to have unobstructed view of the wheels 9, 10 or the wheel edges A, B and C and tread surfaces through the viewing indentations 11, 18 from the operating platform 2 of the rubber tire roller 1.
[0047] In particular FIG. 11, in which the top view of the machine is tilted in such a manner that the viewing beam of the operator in the driver's seat or from the FPCP extends at a very steep angle in relation to the plane of the picture, makes it clear that a viewing of the ground B beyond the rubber tire in question is possible through the viewing indentation from the FPCP. As a result, the driver can view in particular the area lying directly in front of the rubber tire roller from the driver's seat, which makes, e.g., maneuvering easier.
[0048] It is evident from FIGS. 1, 2, 8 and 9 that the rubber tire rollers 1 comprise a roof 27 for their operating platforms 2. The roof 27 is supported by support bars 17, which connect the roof 27 to the machine frame 3. In order to improve the driver's view from the operating platform 2 through the viewing indentations 11, 18, in particular through the viewing indentation 18, e.g., the support bar 17 located on the side of the viewing indentation 18 of the rubber tire roller 1, i.e., in the rear on the left, is arranged closer to the middle of the machine. Instead of arranging the support bar 17 essentially on the machine frame outer edge 21, as it is common in the prior art, the corresponding support bar is thus arranged away from the machine frame outer edge 21 towards the middle of the machine, transversely to the forward direction a, by the distance 26. The distance 26 between the machine frame outer edge 21 and the position of the support bar 17 is selected so that the operator is able to view the rear wheel 10 or the wheel edge C of the rear wheel 10 of the rear undercarriage through the viewing indentation 18 from the operating platform 2 or a position on the driver's seat. Such an offset of the support bar 17 of the roof 27 is, in particular, suitable at the rear of the operating platform 2 in relation to the forward direction a, as it needs to be ensured that the driver's view to the front through the windshield 2 in the forward direction a is as unobstructed as possible. In case the driver would like to view the left rear wheel 10 from the operating platform 2, he or she turns naturally to the left or takes a look over his or her left shoulder so that moving the support bar 17 on this side from the machine frame outer edge 21 to the middle of the machine by the distance 26 ensures an unobstructed view through the viewing indentation 18.
[0049] It is further evident from FIGS. 2, 8 and 10 that a cover 14 is arranged in at least one of the viewing indentations. In the present embodiment, access to a space for ballast, in particular a ballast tank for water, is possible via said cover 14. Its placement within the viewing indentation 11, firstly, saves space and, secondly, permits a ready access from outside the rubber tire roller 1, for example, in order to fill the ballast tank.
[0050] As is evident from FIG. 2, for example, the viewing indentations 11, 18 are configured to be open at the top, i.e., on the side facing away from the ground. This means that the machine frame 3 of the rubber tire rollers 1 recedes towards the machine frame in the region of the viewing indentations 11, 18 at its upper edge, which would not be the case without the formation of the viewing indentations 11, 18. This way, it is easier for an operator to reach devices arranged on the top side of the rubber tire roller 1 or on one of the hoods 19, 20, such as, e.g., a water tank lid 13, as the operator may lean against the rubber tire roller 1 and get closer to the middle of the machine of the rubber tire roller 1 by means of the viewing indentations 11, 18 configured to be open at the top. This way, smaller operators can also easily reach devices arranged higher up on the rubber tire roller 1. This is achieved particularly advantageously, e.g., in the embodiment of a rubber tire roller 1 according to FIG. 9. In this case, a step 12 is arranged at the front right viewing indentation 11, said step 12 lying vertically below the viewing indentation 11. The step 12 here is configured as a foothold or platform on which the operator can stand if he or she wishes to access devices in the upper area of the rubber tire roller 1. This is rendered even simpler by the step recess 16 shown in FIG. 9, which is also formed by the machine frame 3 and which extends substantially vertically upwards from the step 12, i.e., away from the ground 8 and, in the embodiment shown, also in the direction of the viewing indentation 11. The step recess 16 is arranged at a viewing indentation 11, 18 and, in particular, vertically below the viewing indentation 18, 19. The step recess 16 merges with the viewing indentation 11, which is configured to be open at the top. This way, a continuous recess is created in the machine frame 3, extending vertically upwards or away from the ground and in part through the step recess 16 and in part through the viewing indentation 11. An operator may now climb or move into said recess by placing himself/herself on the step 12. As a result of the combined recess, the operator can get much closer to the middle of the machine and thus reaches devices located high up or closer to the middle of the machine of the rubber tire roller 1, which otherwise would have been hard to access, considerably easier.
[0051] The rubber tire rollers 1 of the present invention further comprise transport loops 15 for the suspension of the rubber tire roller 1, said transport loops 15 being configured so as to attach transport means to the rubber tire roller 1. This way, the rubber tire roller 1 can be lifted, e.g., by a crane and placed somewhere else when the rubber tire roller 1 is connected to a corresponding suspension means of the crane via the transport loops 15. According to the present invention, the transport loops 15 are formed by the machine frame and are, in particular, arranged in the region of the viewing indentations 11, 18. Preferably, the transport loops extend parallel to the machine frame outer edge 21 or lie in a plane with the machine frame outer edge 21. This way, the rubber tire roller 1 can be balanced particularly easily by means of the suspension on the transport loops 15, while this does not result in an obstructed view through the viewing indentations 11, 18 for the driver. In the illustrative embodiments shown in the figures, each viewing indentation 11, 18 comprises a corresponding transport loop 15.
[0052] While the present invention has been illustrated by description of various embodiments and while those embodiments have been described in considerable detail, it is not the intention of Applicants to restrict or in any way limit the scope of the appended claims to such details. Additional advantages and modifications will readily appear to those skilled in the art. The present invention in its broader aspects is therefore not limited to the specific details and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the spirit or scope of Applicants' invention.
