JP2015530503A - Electric paving roller - Google Patents

Abstract

The present invention has a rigid support frame (1) supported on a pair of work tools, at least one of which is pivotable and has a U-shaped frame ( 7), a U-shaped frame (7) is connected to the mutually rotating axis of rotation of the work tool and the pivot axis (9), and the pivot axis (9) supports the work tool ( The present invention relates to an electric pavement roller that pivots with respect to 1). In order to increase the work output of the paving roller and to increase the pivot angle of the roller, the present invention is attached to the U-shaped frame (7) in such a way that the axes of the work tool intersect. Present that. [Selection] Figure 1

Description

  [0001] The present invention relates to an electric paving roller as defined by the preamble of claim 1.

  [0002] The present invention can be used in road construction and, in particular, can be used in technical means for compacting road construction compositions, ie paving rollers.

  [0003] Electric pavement rollers having both a central pivot support frame and a rigid support frame are used in road construction. The improvement according to the invention relates to a paving roller having a rigid support frame and a roller pivoting device.

  [0004] From Russian Patent Publication RU20246673, one configuration of an electric paving roller with a rigid support frame is known. The support frame is supported from below on a pair of work tools provided as rollers. Each roller unit includes one roller. In order to steer an electric pavement roller, at least one of the roller units must be pivotable about a steering axis perpendicular to the support frame. Each of the roller units has a U-shaped (U-shaped) frame, and the roller is supported between the leg portions of the frame so as to be rotatable about its central axis. This frame holds the roller (in other words, surrounds) and is supported on the central axis of the roller. The steering mechanism includes a vertical pivot shaft corresponding to the steering shaft. The vertical pivot axis is attached to the U-shaped frame, more precisely to the support frame. The pivot shaft is part of the rocking bearing of the support frame. The pivot axis is kinematically connected to the drive mechanism. Usually, a hydraulic cylinder is used as a drive mechanism. The steering mechanism is provided such that the geometric center axis and the steering axis extend perpendicular to each other and intersect each other. It will be understood that the physical central axis and pivot axis only extend perpendicular to each other and do not intersect.

  [0005] The main drawback of this known arrangement is that the pivot angle of the steering mechanism used is limited. As a result, there is no opportunity to increase the width of the compaction zone (in other words, the compaction width), and thus to increase the work output of the compacting operation. This disadvantage is inherent in paving rollers having two steerable roller units. Further, this type of steering mechanism greatly reduces the degree of freedom of movement of the paving roller having only one steerable roller unit. In addition, a U-shaped frame pivoting device comprising a bearing unit, a drive mechanism, and a kinematic connection between the drive mechanism and the pivot shaft is arranged on the support frame, so that these elements are connected to each other. Mechanically connected. This makes the overall structure of the steering mechanism more complex and more difficult to repair.

  [0006] From German Patent DE 1981475C1 an electric pavement roller is known which comprises a rigid support frame and at least one working tool provided as a roller. At least one roller unit is arranged on the support frame. The roller unit includes a U-shaped (U-shaped) frame and a horizontal cylindrical roller. The roller is supported between the free ends of the leg portions of the U-shaped frame so as to be rotatable about its central axis. The legs are connected by a U-shaped (U-shaped) frame crossbar extending parallel to the central axis on the side away from the free end. The roller unit is disposed on the support frame so as to be pivotable about the steering shaft. The frame is arranged vertically below the support frame, and the free ends of the legs of the frame that extend approximately parallel to the steering axis face downwards, and the steering axis is the crossbar and center Stand upright on both axes. If the motorized paving roller has two roller units, both roller units can be steered, and one of the roller units is pendulum type to compensate for the difference in tilt of the underlying surface Can be supported. In order to steer a roller unit that can be steered, a steering mechanism having a hydraulic cylinder disposed obliquely in the movement direction between the support frame and the frame is used.

  [0007] German Patent Publication DE 3712099A1 discloses an electric pavement roller comprising a rigid support frame and two working tools each provided as a roller. Both rollers are supported in a U-shaped (U-shaped) frame so as to be rotatable about their central axes. Each of the two frames is placed on the support frame by its crossbar connecting the two legs. Both frames are each supported pivotably about its own steering axis, which is supported by the respective crossbars of each frame and the respective rollers rotatably supported between the legs of the frame. Stand up on both of the central axes.

  [0008] From German utility model DE20020088U1, an electric pavement roller is known which comprises a rigid support frame and two working tools each provided as a roller. Each of the rollers is supported in the frame so as to be rotatable about its central axis. Each frame is articulated at its opposite end face to a centrally arranged support frame via a central pivot including a vertical steering axis. One of the two rollers can be steered with respect to the support frame, and the other roller or both rollers can be steered in the same or opposite direction at equal or different steering angles. Thus, the electric pavement roller can even be driven obliquely with respect to the direction of its support frame at a so-called press-on tire offset, resulting in the width of the compaction band (in other words, , The compaction width) can be increased.

  [0009] A common feature of known motorized paving rollers is that they only allow a limited width compaction band in the operating mode. Furthermore, these electric pavement rollers have a maneuverability because the oblique position of the rollers relative to the support frame is limited by the steering mechanism used and / or the articulated connection between the steerable roller and the support frame. Very limited. A further disadvantage of the known motorized paving rollers is the poor movement behavior associated with the limited freedom of movement in the path between where they are used.

  [0010] An object of the present invention is to increase the work output in a compacting operation by increasing the compaction width, specifically by increasing the pivot angle of the roller. A further object is to improve the freedom of movement of the paving roller and to improve the repair conditions of the roller pivoting device.

  [0011] This object is achieved by the features of claim 1.

  [0012] The stated objectives are achieved as follows.

  [0013] The motorized paving rollers have a rigid support frame supported at the bottom on a pair of work tools, each of the work tools preferably including at least one roller. At least one of these work tools is provided as a pivoting device that is pivotable about a steering shaft that stands upright on the support frame. The pivot device includes a U-shaped or U-shaped frame, and at least one roller of the work tool is surrounded between legs of the frame and is supported rotatably about a horizontal rotation axis. The crossbar (in other words, the horizontal beam) of the U-shaped or U-shaped frame that extends parallel to the horizontal axis is connected to the support frame by a connecting portion having a vertical (in other words, vertical direction) pivot axis. Combined. The pivot axis corresponds to the steering axis of the respective pivot device. The U-shaped frame is disposed sideways so that the crossbar is located outside. The crossbar is coupled to the front portion of the support frame.

  [0014] This front portion can be made to move back and forth in the direction of movement of the paving roller relative to the middle portion of the support frame.

  [0015] The effect of the proposed improvement can be significantly enhanced when the at least one work tool includes different pairs of rollers.

  [0016] The first roller of a pair of different rollers may be provided as a laterally oriented cylindrical roller rotatably supported about its central axis, the roller being, for example, hollow and Optionally, it may be filled with a liquid or a pourable material such as sand, or it may be made of metal, for example. The second roller of the pair of different rollers can be provided as a plurality of wheels, such as solid rubber wheels, rotatably supported on a common axle.

  [0017] Such different rollers can be combined into a pair of side beams and formed into a carriage similar to a carriage.

  [0018] The middle portion of such a side beam can be coupled to a U-shaped frame, for example, that embraces (in other words, surrounds) the side beam by a connection with a horizontal axis. When the frame holds the side beams, the side beams are placed between the legs of the frame. The U-shaped frame is then coupled to the front portion of the support frame. The carriage is pivotally mounted about the horizontal axis of the connection. This can compensate for ground inhomogeneities, and both rollers in different roller pairs attached to the carriage maintain contact with the ground. Alternatively or in addition, the carriage can be mounted in a manner that can be pivotally driven about the horizontal axis of the connection. As a result, by actively pivoting the carriage about the horizontal axis of each carriage, one or both of the two different rollers are selectively in contact with the ground. This can be advantageous, for example, when self-propelled from one location where the motorized paving roller is located to another location where the roller is used. For example, when one of the different rollers of the two carriages provided on one electric pavement roller is provided as a plurality of solid rubber wheels or the like attached to a common axle, In addition to the driving performance, the degree of freedom of movement of the motor-driven roller in the path between the places of use can be greatly improved as compared with the prior art.

  [0019] Furthermore, both work tools can each be pivotable about their own steering shaft extending parallel to each other.

  [0020] Preferably, the pivot mechanism steering mechanism includes two hydraulic cylinders. The two hydraulic cylinders are arranged obliquely with respect to the longitudinal axis of the support frame of the electric pavement roller and in opposite directions (in other words, symmetrical directions). For each hydraulic cylinder, each first end is connected to a support frame so as to be pivotable about an articulated shaft extending parallel to the steering shaft. Each second end of the two hydraulic cylinders is connected to a frame, for example to a crossbar of the frame, so as to be pivotable about an articulated shaft extending parallel to the steering axis. The two hydraulic cylinders are pivotally connected to the frame by their second end on the side of the frame opposite the steering shaft. As a result, when the steering angle reaches 90 ° or more, at least one of the two hydraulic cylinders will move the pivot device in its initial position, ie the longitudinal direction of the support frame of the electric paver roller. A movement is brought back to a position extending perpendicular to the axis. Therefore, the steering mechanism allows the steering angle of the pivotable pivoting device to be 90 ° in both directions with respect to the longitudinal axis of the support frame. Therefore, in an electric pavement roller having two pivotable pivoting devices. Can be moved laterally with respect to the longitudinal axis of the support frame in addition to a significant increase in the compaction width. In order to prevent the electric paving roller from rolling over, the steering angle can be limited to an angle of less than 90 ° in both directions. Alternatively, or in addition, at least one pivoting device can be provided on two identical or different rollers, thereby preventing the motorized paving roller from lying down. In the manner of having one or two pivoting devices, greatly improved motorized paving roller maneuverability is also obtained.

  [0021] The present invention will be described in further detail in conjunction with the drawings.

1 is an overall view of an electric pavement roller having one pivot device. 1 is an overall view of a pivot mechanism steering mechanism including intersecting axes of rotation and pivot axes. FIG. It is a general view of an electric pavement roller having two pivot devices. It is a top view which shows schematically the paving roller which has two pivoting apparatuses. 1 is an overall view of a motorized paving roller including a work tool embodied by a pair of different rollers. FIG. FIG. 6 is a plan view schematically showing the pavement roller of FIG. 5. It is a figure explaining the operation mode at the time of performing the compacting operation | work using the electric pavement roller of FIG.

  The motorized paving roller (FIG. 1) includes a rigid support frame 1. An engine 2 and a driver's cab 3 for the driver are mounted on the support frame 1. The frame 1 is supported from below on a pair of work tools in the form of smooth rollers 4 and 5. One of the work tools is provided as a pivot device disposed on the support frame 1 so as to be pivotable about a steering shaft. The pivoting device includes a pivotable roller 4, which is supported rotatably about a horizontal rotation axis 6 and is coupled to a U-shaped frame 7 disposed sideways. The When the frame 7 is disposed sideways, the leg and the crossbar connecting the two legs extend in a plane parallel to the longitudinal axis 16 of the support frame 1. The frame 7 is connected to the end of the support frame 1 by a steering mechanism. The steering mechanism includes a connecting portion including a bush 8 and a pivot shaft 9 that forms a steering shaft. More specifically, the support frame 1 is firmly connected to the vertical pivot shaft 9. The pivot axis 9 is arranged outside the horizontal projection plane of the work tool or its rollers.

  [0023] One of the available embodiments of the pivot mechanism is shown in FIG. Here, the pivoting movement of the U-shaped frame 7 due to the force at the connection is brought about by the hydraulic cylinder 10, both of which can pivot on the frame 7 and the structural part of the support frame 1. Connected to. The pivoting angle of the roller can reach 90 °. This is proved by moving the position “A” of the rod mounting portion of the hydraulic cylinder 10 to the position “B” on the U-shaped frame 7. The axis of rotation 6 of the roller 4 and its pivot axis 9 are installed in an intersecting manner on the paving roller, and their geometric axes are perpendicular to each other.

  [0024] In the configuration of a motorized paving roller with two pivotable rollers, the pivoting device for each roller is completely identical to the device described above (Figure 3).

  [0025] FIG. 4 schematically shows a pavement roller having two pivotable rollers in plan view. In this position, the outwardly pivoted roller doubles the compaction width. The pivot angle of each roller at this time is much smaller than 90 °.

  [0026] In FIG. 5, a modification of an electric pavement roller having four rollers is shown. A motorized paving roller with four rollers is described in the Soviet Union Patent Publication SU1401097. Here, the conventional pivoting device is replaced by an improvement according to the invention. The paving roller has two work tools in addition to the rigid support frame 1 having the engine 2 and the cab 3. Each of the work tools has a different pair of rollers. One roller 11 is pneumatic. The second roller 12 is smooth and vibrates. These rollers 11 and 12 are combined using a pair of side beams 13 to form a carriage. These side beams 13 are connected to the U-shaped frame 7 by a horizontal connection portion 14. The frame is coupled to the front portion of the support frame 1 by a connection. The connection includes a bushing 8 and a vertical pivot shaft 9. Both front parts are movably provided relative to the middle part of the support frame 1. The forward / backward movability of the front portion of the support frame 1 is ensured only when the front portion is connected to the movable beam 15. The beam 15 is inserted into the linear guide of the support frame 1. These guides have the same orientation as the paving roller movement. The adjustment drive mechanism of the beam 15 is not shown in the drawing. It is preferable to use a hydraulic drive mechanism. The steering mechanism of the work tool of the multi-roller machine is the same as that shown in FIG. This pavement roller is characterized by its articulated connection between the side beams 13 and the U-shaped frame 7 and also under the influence of a special drive mechanism (not shown in the drawing). Depending on the material to be compacted, the possibility of changing the tilt angle makes it possible to bring either roller or a combination of rollers into contact with the surface to be compacted.

  [0027] In FIG. 6, a plan view of a motorized paving roller including four rollers is schematically shown. In this machine, the front part of the support frame 1 can be pushed and expanded by the movable beam 15, so that the work tool can be pivoted at a wide angle, and the undercarriage (in other words, the chassis) of the work tool can be moved. Even though it can be expanded, a compaction width can be obtained.

  [0028] The function of the electric paving roller including the novel pivoting device of the work tool is shown by way of example of a paving roller including four rollers.

  [0029] When the compaction operation is performed by a roller, the carriage of each work tool can rotate about the horizontal connection 14, so that the user can select one of a set of rollers depending on the type of material To do. The required rollers are brought into contact with the surface to be compacted and the other rollers are floated. At the same time, an optimum rolling width is selected by deflecting the roller by a necessary angle. This is achieved by the pivoting device according to the invention and by separating the front part of the support frame 1 (FIG. 6). Next, the rolling operation can be performed according to the functional diagram in FIG. For example, when the surface composition is compacted, the smooth roller 12 is floated and the pneumatic roller 11 becomes a support roller (FIG. 7, position I). In order to enhance the compaction of the soil, a set consisting of both a roller 11 including a pneumatic tire and a smooth vibrating roller 12, taking into account the soil specific aspect (dense or sparse) (FIG. 7, position III) can be used. A combination of two rollers can be used for compaction of the aggregate foundation (FIG. 7, position V). These rollers form so-called combination paving rollers. When compacting an asphalt-concrete mixture, it is appropriate to use a combination of rollers according to position II and IV, and other combinations, depending on the brand name of the asphalt-concrete mixture, the initial temperature of the asphalt, and the ambient temperature. is there.

  [0030] The possibility of automating compaction operations via an on-board computer, with various variations in roller width and considerable process-related technical capabilities of an electric paving roller comprising four rollers, is a software package within the on-board computer. This is achieved for the first time by using

Claims (9)

A rigid support frame (1) supported from below on a pair of work tools, at least one of said work tools being pivotable and into a U-shaped or U-shaped frame (7) An electric pavement roller enclosed and connected to the support frame (1) by a connection having a vertical pivot axis (9), the crossbar of the frame (7),
Electric pavement roller, characterized in that the frame (7) is arranged sideways so that the crossbar is located on the outside and is coupled to the front part of the support frame (1). The front part of the support frame (1) coupled to the frame (7) is arranged to be movable back and forth with respect to the intermediate part of the support frame (1) in the movement direction of the electric paving roller. It is characterized by
The electric pavement roller according to claim 1. At least one work tool comprises a pair of different rollers (11, 12),
The electric pavement roller according to claim 1 or 2. The pair of different rollers (11, 12) is combined using a pair of side beams (13) to form a carriage,
The electric pavement roller according to claim 3. An intermediate portion of each side beam (13) is coupled to the frame (7) by a connection having a vertical pivot axis (9), the frame (7) being connected to the support frame (1). Coupled to a forward portion, wherein the carriage is pivotally mounted about a horizontal axis of the connection,
The electric pavement roller according to claim 4. The side beams (13) are arranged between the legs of the frame,
The electric pavement roller according to claim 5. Both working tools are pivotable,
The electric pavement roller according to any one of claims 1 to 6. An end of the support frame (1) is connected to the pivot shaft (9) and is movable back and forth in the moving direction of the paving roller with respect to the rest of the support frame (1). It is characterized by being attached to the
The electric pavement roller according to any one of claims 1 to 7. The electric pavement roller according to any one of claims 1 to 8, further comprising a steering mechanism for at least one work tool pivotable around a steering shaft, Including two hydraulic cylinders that are arranged obliquely with respect to the longitudinal axis of the support frame of the electric pavement roller and in opposite directions, for each hydraulic cylinder,
A first end is connected to the support frame articulated around an articulated axis extending parallel to the steering axis;
A motorized pavement, wherein the second end is connected to the frame articulated around an articulated axis extending parallel to the steering axis on the side of the frame opposite the steering axis roller.

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