JP6879956B2 - How to control hand-guided ground compaction rollers and hand-guided ground compaction rollers with maneuvering mode - Google Patents

Description

The present invention relates to a hand-guided ground compaction roller (hand-held soil compression roller) and a method of maneuvering such a ground compaction roller.

Hand-guided ground compaction rollers of the genus concept are known, for example, from EP0971073A1 and EP1096072B1. Hand-guided ground compaction rollers are used, for example, in asphalt compaction, especially in road construction, mountain road construction, and earthwork. The hand-guided ground compaction roller generally has a mechanical frame and a drive motor supported by the mechanical frame, such as an internal combustion engine. Not only that, the hand-guided ground compaction rollers are typically driven by a drive motor to provide a first roller drum and a second roller drum located behind the first roller drum in the forward direction. It has a traveling mechanism that allows the hand-guided ground compaction roller to run on the ground. Accordingly, the present invention relates to a hand-guided ground compaction roller with a total of at least two roller drums. The roller drum is generally formed as a hollow cylinder, and the entire mechanical weight of the ground compaction roller is applied to the roller drum. Ground compaction The ground on which the rollers run is compacted by the weight of the machine. The roller drums are arranged within one common mechanical frame so that the horizontal axes of rotation of both roller drums extend parallel to each other and are in static or fixed non-displaceable positions with respect to each other. ing. Therefore, it is not possible to change the relative positions of both rotation axes of both roller drums for maneuvering. Not only that, ground compaction rollers of the genus concept often have an exciter in the form of, for example, an unbalance generator, which excursors can cover one or both roller drums or the entire ground compaction roller. Swing. By transmitting this vibration to the ground, the compaction performance can be improved. The present invention particularly relates to a hand-guided double vibrating roller.

The hand-guided ground compaction roller can generally be operated in a working mode in which the roller drum is stopped or is driven forward or backward in the same direction of rotation. At that time, the ground running on the ground is compacted in both the forward direction and the reverse direction. In order to control and especially steer the hand-guided ground compaction rollers, the hand-guided ground compaction rollers generally have a guide rod (guide bracket), which the user can use as a hand-guided ground compaction roller. Is formed for maneuvering by hand. The guide rod is fixed to, for example, the mechanical frame of a ground compaction roller and extends rearward from the mechanical frame. The operator exerts a force on the guide rod to steer the ground compaction roller, which redirects the ground compaction roller in the desired direction. However, it is not at least two ground compaction drums that can be steered in the traditional sense. This is because the ground compaction drum is a rotating shaft that is fixedly mounted on the machine frame of the machine. However, the ground compaction roller of the genus concept is a relatively heavy machine whose operating weight exceeds 1000 kg at the maximum, and it takes a considerable amount of labor to operate the ground compaction roller by the muscular strength of the operator.

EP0971073A1 and EP1096072B1 propose joints between the roller drums, in particular to reduce the burden on the operator when maneuvering the hand-guided ground compaction rollers, thereby tilting or tilting the axes of rotation of the roller drums to each other. It can be swiveled, which facilitates maneuvering of the ground compaction roller. In this case, the twisting of the drum shafts relative to each other can be assisted or automated, for example by the use of additional hydraulic cylinders. The solution from the above-mentioned state-of-the-art technology does make maneuvering really much easier, but the design costs are high, which clearly increases the cost of manufacturing ground compaction rollers.

EP0971073A1 EP1090672B1

Therefore, the problems of the present invention as a whole are that, firstly, the operation of the ground compaction roller is easy for the operator, and secondly, the design cost and the manufacturing cost of the hand-guided ground compaction roller are as low as possible. It is to present the maneuvering method of the holding hand-guided ground compaction roller and the hand-guided ground compaction roller.

The solution to this problem is successful with hand-guided ground compaction rollers and methods under independent claims. The preferred form of formation is shown in the dependent claims.
In other words, specifically, in the case of the hand-guided ground compaction roller described at the beginning, this solution has a control mechanism for operating the hand-guided ground compaction roller in the maneuvering operation mode, and this control mechanism exists. However, both of the roller drums, which are in phase with each other in the forward direction of the ground compaction roller and whose rotation axes, that is, rotation axes, are statically and fixedly arranged with each other, are operated in opposite rotation directions in the maneuvering mode. And / or at least one roller drum, in particular both roller drums, are successfully formed to operate while changing the direction of rotation at a set frequency (predetermined frequency). The present invention is arranged one after the other, especially in the forward direction of the ground compaction rollers or in the direction of rotation of the roller drums, the axes of rotation of which are parallel and static or immobile with respect to each other, especially with respect to the mechanical frame. With respect to hand-guided ground compaction rollers with roller drums. In other words, the present invention is directed, among other things, to hand-guided ground compaction rollers that do not have joints or other mechanisms for mutual twisting or turning of the rotating shafts of the roller drums to facilitate maneuvering. There is. This succeeds in a particularly simple design of a ground compaction roller that is robust and inexpensive to manufacture.

Here, in order to simplify the operation of such a ground compaction roller, a control mechanism for controlling the ground compaction roller in the maneuvering operation mode is provided. The central idea of the present invention is that the control mechanism results in the fact that the ground compaction roller can be steered particularly easily by the guide rod during operation in the maneuvering mode. This controls, at least temporarily, to reduce the ground contact of the ground compaction rollers so that relatively no force is required to change the direction of travel of the ground compaction rollers by pulling or pushing the guide rod. The mechanism succeeds by driving the roller drum of the ground compaction roller. In order to reduce the ground contact of the ground compaction rollers at least temporarily, it is contemplated, for example, to operate both roller drums in opposite rotational directions in the maneuvering mode, for example, according to the present invention. During such operation, the ground compaction rollers do not move, but substantially remain in that position. Both roller drums slip on the ground, causing slippage between the roller drums and the ground. The relatively high static friction of the roller drum on the ground is converted to sliding friction, which is part of the static friction. This allows the ground compaction roller to be steered with a portion of the required force.
Instead, it is also contemplated to block one of both roller drums and simultaneously rotate the other of both roller drums in one direction of rotation. Thus, in this variant, the blocked drum does not move in maneuvering mode. The drum is rather actively immobilized by, for example, a brake, a hydraulic shutoff, or the like. On the other hand, the other roller drum is rotated. Ideally, the blocked drum results in the ground compaction roller moving completely or very slightly on the ground as the other roller drum spins on the ground. Therefore, if the weight distribution is not uniform, it is also meaningful to use it for blocking the roller drum on which a larger percentage of the machine weight is placed.

An additional alternative and especially supplementary potential for reducing the static friction of ground compaction rollers is to operate at least one roller drum, especially both roller drums, with a set frequency of rotation diversions. is there. Thus, for example, if the direction of rotation of at least one roller drum or both roller drums is suddenly changed in the direction opposite to the direction of movement of the ground compaction roller, a sliding state is similarly achieved between the roller drum and the ground. To. That is, the ground compaction roller is accelerated in one direction, for example, in the working operation mode, and then the rotation direction of the roller drum is switched in the opposite direction. This also causes the roller drum to slide on the ground, which clearly reduces the static friction of the ground compaction rollers. By replenishing it or instead, alternating motion can lift one side or both roller drums of the machine in the short term, which also facilitates maneuvering. Such a change of direction of rotation of the roller drum is repeated particularly regularly in the maneuvering mode, that is, the direction of rotation of the roller drum is rhythmically alternated. By controlling the traveling mechanism in the maneuvering mode by the control mechanism, the rotation direction can be changed at the optimum set frequency, thereby minimizing the static friction of the ground compaction roller. The ground compaction roller can be steered much better in maneuvering mode. Overall, this allows the control mechanism to provide optimally defined sliding behavior of the ground compaction rollers in maneuvering mode, thus allowing for relatively easy maneuvering as a whole. Not only that, the operator can maneuver the ground compaction roller with both hands using the guide rod in maneuvering mode. Thereby, the present invention, as a whole, clearly facilitates maneuvering of the ground compaction rollers.

As described above, the thrust of the ground compaction roller or its inertia can be utilized to generate the slip condition, so that the roller drum rotates forward and backward during the movement of the ground compaction roller. Switching between runs, which causes the roller drum to slip, at least in the short term. However, for safety and precision control reasons, it is preferred that the ground compaction rollers slide as little as possible. Therefore, in maneuvering mode, the direction of rotation of at least one roller drum, especially both roller drums, is regularly switched forward and backward after a set time interval, or alternately between forward and reverse travel. It is preferable to switch to. In particular, by accelerating the roller drum sufficiently strongly, even if the ground compaction roller is not moving, it can be achieved that the roller drum loses ground contact and spins immediately after switching. In this case, the ground compaction roller moves only when the roller drum is operated in the same rotation direction for a sufficiently long time. On the other hand, if the rotation direction of the roller drum is repeatedly switched by the control mechanism before the ground compaction roller itself is accelerated as a whole, the ground compaction roller does not move and the roller drum may idle in the opposite direction. it can. That is, in this variant of the maneuvering mode maintained by the control mechanism, the ground compaction rollers do not move at least as much as they deserve, but nevertheless a slip condition occurs between the roller drums and the ground. In particular, in this mode of maneuvering operation, it is preferable that the setting frequency is at least once per second, preferably at least two times, and particularly preferably at least three times. It has been found that this frequency allows for particularly easy and at the same time particularly precise maneuvering of ground compaction rollers.

In the simplest and most advantageous variant possible, in maneuvering mode, for example, the roller drum is rotated in the opposite direction of rotation, and this direction of rotation is fixed, or only one of the roller drums is rotated. On the other hand, the other roller drum is operated by blocking, or at least one or both of the roller drums are operated while changing the rotation direction at a set frequency, and at that time, for example, the frequency of rotation direction change is changed. It is fixedly set, and a control mechanism is formed so that the operator does not affect the frequency. Therefore, in these variants, in extreme cases, there is only one maneuvering mode in which the maneuvering conditions are completely determined. However, since the genus concept of ground compaction rollers is often used on a rolling foundation, the control mechanism or control unit is formed so that the operator can influence the operating conditions in the maneuvering mode. It can be advantageous if there is. For this purpose, for example, it is possible to intend to form the control mechanism so that the control mechanism is formed for control by at least two different set frequencies that can be selected by the operator in the maneuvering mode. A control mechanism is formed so that the operator can steplessly adjust the optimum rotation direction change frequency within the frequency range by an appropriate switching element, for example, which will be described in more detail below. If so, they are also included in the scope of the invention.

Further embodiments can be contemplated in which the operator can influence the control of the roller drum in the maneuvering mode by the control mechanism. Basically, the control mechanism can be formed such that the rotational direction and / or rotational speed of at least one roller drum, particularly both roller drums, is constant, for example in maneuvering mode. However, it is also preferable that an operating element is present and that the operating element allows the operator to select and / or change the rotation direction and / or rotation speed of one / both roller drums in the maneuvering mode. In particular, fluctuations in rotational speed can therefore affect the rotational speed by the traveling lever, ideally by the traveling lever, which also controls the traveling speed of the ground compaction roller in traveling driving. It is especially advantageous to be successful by being. It is also intended to replenish it, or in this context, to form a control mechanism so that the rider can choose from at least two different fixed rotational speeds with respect to rotational speed, eg, by appropriate operating elements. be able to. Two different rotation directions and / or rotation speeds are possible for each individual roller drum, for example when the roller drums are operated in opposite rotation directions in maneuvering mode. Further replenishing it or instead providing at least two modes of operation for grounds of different nature, for loose foundation materials such as gravel and for cohesive ground materials such as asphalt. It is preferable that a control mechanism is formed so as to do so. Therefore, here the operator can easily switch between at least two modes of operation for maneuvering modes, thereby reacting to the various properties of the ground material present at any given time. Can be done. Thus, for example, in order to prevent damage to the ground or the occurrence of irregularities, depending on the usage conditions or, for example, the ground material, for example, one or the other rotation direction and / or one or the other rotation speed and / or one or The operator can select the other conversion frequency. Not only that, the operator can influence the additional functions collectively by the same operating element or additional additional operating elements. This function belongs to, for example, the frequency with which the rotation direction of the roller drum is changed. It is preferable that the frequency can be adjusted steplessly, for example, from one rotation direction change per second to, for example, five rotation direction change intervals per second. One of the additional functions mentioned is whether one roller drum or both roller drums are operated in the maneuvering mode while changing the rotation direction at a set frequency. That is, it is preferable that this can also be selected by the operator. One additional additional function is how the maneuvering mode is realized by the control mechanism, that is, specifically whether the roller drum is driven in the opposite direction of rotation in the maneuvering mode, or at least one of them, among others. It is a choice of whether both roller drums are operated while changing the rotation direction at a set frequency. That is, it is preferable that this function can also be adjusted by the operator by the listed operating elements or additional operating elements instead. Overall, no structural changes to the ground compaction rollers are required, only intervening in the control of the maneuvering mode by the control mechanism, which compares maximum possible flexibility and relatively high operational comfort. It comes at a low design cost.

According to the present invention, here the operator can easily activate the maneuvering mode by the control mechanism for the maneuvering process, and then perform the maneuvering process as long as the maneuvering mode is activated. Have time to do. For this purpose, it is particularly preferable that the guide rod is provided with an appropriate operating element, for example, a switch, which can switch the control mechanism between the working operation mode and the maneuvering operation mode. The switch can be located, for example, on an operation console commonly found on guide rods. By doing so, the switch is easily reachable to the operator and can be easily activated. The switch is connected to a control mechanism such that the maneuvering mode is activated when the switch is activated and the ground compaction roller is in working mode. Conversely, activating the switch while the ground compaction roller is in maneuvering mode activates working mode. Instead, the operator must hold down the switch during maneuvering mode, and it can be intended that the switch automatically returns to the other position, the working mode, when the switch is released. That is, the passive "normal position" of the switch is the working mode, and therefore the switch position that the operator should actively maintain is the maneuvering mode. A preferred placement position for replenishing it or instead is, for example, a switch placed directly in or on the edge of the handle's grip area, a centrally placed switch, eg, between two handles. Horizontal support rods, such as switches located within the area of the operating area with additional functional elements. This allows the operator to activate / deactivate the maneuvering mode and at the same time change, for example, the direction of motion and / or the number of revolutions of the roller drum, particularly well. Particularly preferred is an ergonomically optimized arrangement for thumb operation so that not only the switch operation but also the maneuvering process itself can be controlled at the same time, for example. As a whole, it is also included in the present invention that the ground compaction roller simultaneously comprises a plurality of operating elements that can activate and deactivate the maneuvering mode, respectively, by actuation. In this case, the operator can select the optimum operating element under various usage conditions.

To make the operation of the ground compaction rollers easier so that the operator can focus his attention on the actual compaction work, and to free the operator from operating the operating elements directly by hand. , A development of the present invention formed so that the operator automatically senses when he / she wants to carry out the maneuvering process is preferable. For this reason, it is preferred that the switch is formed, for example, as a contact switch, especially as a button and / or a push switch, and can be moved by the pressure or force exerted by the operator on the guide rod. The switch exists, for example, at the connection position between the guide rod and the mechanical frame of the ground compaction roller. The switch is designed to be activated when the operator applies pressure or force to the guide rod in a particular direction. For example, the switch can be formed such that the operator pushes the guide rod horizontally to the left and / or to the right, especially around a substantially vertical control axis. Alternatively, maneuvering can be performed in the same manner as the steered wheels, centered on a maneuvering axis that is substantially horizontal or extends along the longitudinal axis of the guide rod. In other words, the switch is activated when the operator initiates the maneuvering motion of the ground compaction roller using the guide rod. To this end, the operator must exert a force on the mechanical frame of the ground compaction machine, at least on a guide rod that is relatively displaceable to a limited extent. The switch detects this force and automatically activates the maneuvering mode via the control mechanism. The activated maneuvering mode facilitates maneuvering the ground compaction rollers. That is, in this embodiment, the operator only needs to perform the maneuvering motion desired by the operator using the guide rod, and the activation of the maneuvering operation mode is automatically performed by the switch that detects the motion of the guide rod. The operator may have to push the guide rod vertically up or down to activate the maneuvering mode with the switches described above. In this case, the switch detects the force acting vertically up or down on the guide rod, thereby activating the maneuvering mode via the control mechanism. In other words, the operator can swing the guide rod horizontally to the left or right and also push it up or down if he wants to use the assistance of the maneuvering mode to steer the ground compaction roller. Activates the maneuvering mode. In this embodiment, if the operator does not want to use the maneuvering mode, he can do so by swinging the guide rod only horizontally without pushing the guide rod up or down.

In order to further simplify the operation, it is preferable that the switch is formed so as to self-return from the maneuvering mode to the working mode, especially under the action of a spring. Such switches are also called buttons, among other things. For example, it is possible to intend that the maneuvering operation mode is automatically terminated after a set time interval and the ground compaction roller is operated again in the working operation mode. The corresponding time interval can be, for example, 1 second, 2 seconds, 3 seconds, 4 seconds, or 5 seconds. In particular, in a preferred embodiment of the invention in which the operator can move the switch by the pressure or force exerted on the guide rod, the automatic return of the switch allows the operator to engage entirely in activating or deactivating the maneuvering mode. You don't have to, and you can concentrate completely on the operation and control of the ground compaction rollers. That is, the maneuvering mode is automatically deactivated when the above-mentioned force or pressure is no longer applied to the guide rod.

As mentioned at the outset, the present invention is based on the idea of reducing friction between the hand-guided ground compaction roller and the ground, thus facilitating the maneuvering process. Therefore, in order to further assist this, it is preferable to provide at least one roller drum with a watering mechanism formed for spraying a fluid, particularly water. Particularly preferred is the application of fluid to all roller drums. The fluid thus reaches between the roller drum and the ground and acts as a slipper, which reduces the friction between the ground and the roller drum. This effect makes the maneuvering process even easier.

Therefore, it is also advantageous to be able to adopt various developed forms of the present invention with respect to the specific form of the watering mechanism. First, basically, the mechanism and / or operation mode of the sprinkler mechanism provided for the compaction operation can also be used for the maneuvering operation mode. This means that the switching to the maneuvering mode causes the conventional watering mechanism to be operated at a different distance and / or route. The advantage of this modified form is that the watering mechanism needs little modification. However, it is also desirable to prepare a reserve for compaction operation or maneuvering operation. For example, in the case of reserve for maneuvering mode, in the compaction operation of the tank of the sprinkler mechanism, for example, it is monitored by an appropriate remaining amount sensor, and it is emptied only to the specified minimum, and it is in the tank. The remaining fluid is meant to be used exclusively when activating the maneuvering mode. This ensures that the fluid can be supplied, at least in maneuvering mode, even when the fluid stock is small. Instead, this preferential treatment may be applied to more standard compaction operation than maneuvering mode. Basically, in view of the entire structure of the machine, it is advantageous that the fluid supply for the maneuvering mode and the compaction operation is done from one and the same tank, for example to prevent adhesion to the roller drum. .. However, it can also be contemplated that instead, for the maneuvering mode, there will be a dedicated and separate tank provided exclusively for the maneuvering mode for fluid supply. This is especially advantageous when different fluids should be employed for maneuvering mode and compaction operation, such as water, or water mixed with a separator. Further, regarding the maneuvering process, it is advantageous that the machine moves in the forward or backward direction as little as possible after the maneuvering mode is activated. Further, regarding the fluid discharge in the maneuvering operation mode, a discharge mechanism that discharges the fluid even in the compaction operation, for example, a spray bar can be adopted. In this case, nevertheless, fluid, at least in the short term, compared to fluid discharge in compaction operation, to allow sufficient wetting between the roller drum and the underlying ground during maneuvering. Is preferably fired in large quantities by the watering mechanism. This means that it is preferable to set the flow rate of the sprinkler mechanism higher than that of the compaction operation for the maneuvering process, at least in the short term. It is preferred to replenish it or instead, in maneuvering mode, bring the fluid particularly accurately near the contact area between the roller drum and the ground. For this reason, in maneuvering mode, the fluid is brought into this contact area in the forward and / or reverse direction and / or vice versa by an accurate pressure impulse using a pressure source such as an accumulator or pump. It can also be planned to fly directly in front or in. This can be done permanently over the entire duration of activation of the maneuvering mode, or preferably during at least one first impulse, especially in time-controlled variants, during this impulse. First, sufficient wetness of the roller drum and ground is achieved for the entire maneuvering process. The latter variant has the advantage of relatively low fluid consumption for the maneuvering process. Thus, this causes the ground compaction roller to have a spraying mode "maneuvering" and a spraying mode "compacting", and in particular, in maneuvering mode by itself switching to spraying mode "maneuvering" and / or maneuvering. A control mechanism is formed so that when the mode ends, the spray mode "steering" is released by itself.

The problems mentioned at the beginning are also solved by the method of maneuvering the hand-guided ground compaction rollers, especially the hand-guided ground compaction rollers as described above. All of the above-mentioned properties, features and advantages of the hand-guided ground compaction rollers according to the invention apply accordingly to the methods according to the invention and are not explicitly stated here simply to avoid repetition.

In the method according to the present invention, the ground compaction roller is changed from a work operation mode in which the first roller drum and the second roller drum are stopped or operated in forward or reverse travel in the same rotation direction to a maneuvering operation mode. And / or at least one roller drum, especially both roller drums, turning at a set frequency so that the roller drums are driven in opposite directions in the maneuvering mode. With the step of driving the ground compaction roller in maneuvering mode by the control mechanism so that it is driven and / or one roller drum is blocked and the other roller drum is driven to rotate. It includes a step of returning the operation mode of the ground compaction roller from the maneuvering operation mode to the working operation mode. As already detailed above, the operation mode of the ground compaction roller can be switched, for example, by the operator activating the switch, or the operator's force applied to the guide rod is detected by the switch. It can be done by doing.

Particularly preferred is the case where the operation mode of the ground compaction roller is returned from the maneuvering operation mode to the working operation mode by itself.
A further advantageous embodiment of the method according to the invention is associated with a corresponding embodiment for a hand-guided ground compaction roller according to the invention.
Hereinafter, the present invention will be described in more detail based on the exemplary embodiments shown in the figures.

It is a schematic side view of the hand guide type ground compaction roller. It is the schematic of the traveling mechanism of the ground compaction roller in the work operation mode in the 1st rotation direction. It is the schematic of the traveling mechanism of the ground compaction roller in the work operation mode in the 2nd rotation direction. It is the schematic of the traveling mechanism of the ground compaction roller in the maneuvering operation mode in the 1st rotation direction. It is the schematic of the traveling mechanism of the ground compaction roller in the maneuvering operation mode in the 2nd rotation direction. It is the schematic of the traveling mechanism of the ground compaction roller in the maneuvering operation mode in the 1st reverse rotation direction. It is the schematic of the traveling mechanism of the ground compaction roller in the maneuvering operation mode in the 2nd reverse rotation direction. It is the schematic of the traveling mechanism of the ground compaction roller in the maneuvering operation mode with a blocked roller drum and a rotating roller drum. It is a figure which shows the time transition in the rotation direction of a roller drum during operation of a ground compaction roller. FIG. 6 is a schematic view of a control mechanism and elements of a ground compaction roller connected to the control mechanism. It is a flow chart of a method. It is a schematic oblique perspective view of a guide rod with a plurality of alternative working elements. It is a hydraulic circuit diagram for establishing a maneuvering operation mode and a working operation mode.

The same parts or parts that work in the same way are marked with the same reference numerals. Parts that appear repeatedly are not marked differently in each figure.

FIG. 1 shows a hand-guided ground compaction roller 1. The hand-guided ground compaction roller 1 has a rigid mechanical frame 2 supported by a traveling mechanism 13 including a first roller drum 4 and a second roller drum 5. Both roller drums 4 and 5 are arranged one after the other in the forward direction A, so that when traveling straight in the forward direction, the first roller drum 4 in front of the ground reference point first Then, the second roller drum 5 behind runs. The ground compaction roller 1 is driven by a drive motor 3, here, for example, an internal combustion engine. Not only that, the hand-guided ground compaction roller 1 has a guide rod 7, which is connected to the machine frame 2 on one side and has an operation console 8 on the other side. Various control elements are arranged on the operation console 8, and the operator controls the ground compaction roller 1 by using these control elements. The guide rod 7 is on the rear side of the machine when viewed from the forward direction A of the ground compaction roller 1. By driving the roller drums 4 and 5 of the traveling mechanism 13, the ground compaction roller 1 can travel on the ground 10 in the forward direction A and in the opposite direction, whereby the ground is compacted by the weight of the ground compaction roller 1. Harden. In order to assist this effect, the ground compaction roller 1 has a vibrating body 6 including an unbalanced rotating body, and the unbalanced rotating body swings the entire ground compacting roller 1 and this rocking. Is also transmitted to the roller drums 4 and 5 and acts on the ground 10 via the roller drums 4 and 5, thereby improving the compaction of the ground 10.

The roller drums 4 and 5 are mounted on the machine frame 2 so as to be rotatable around the rotating shafts 11a and 11b that are immovable with respect to each other. The axes of rotation cannot be tilted or swiveled with each other, especially to assist in the maneuvering process. That is, the relative positions of the rotating shafts 11a and 11b are static and cannot be changed, and in particular, cannot be changed by the movement using the guide rod 7. Therefore, the rotating shafts 11 of the roller drums 4 and 5 (see FIGS. 2 to 8) are always parallel and cannot be displaced from parallel positions for, for example, maneuvering. Overall, this provides a particularly robust and simple style of ground compaction roller 1. Nevertheless, in order to facilitate or assist in maneuvering the ground compaction roller 1, the ground compaction roller 1 will describe the traveling mechanism 13 of the ground compaction roller 1 in more detail below in maneuvering mode. It has a control mechanism 12 for controlling the vehicle.

A switch 19 is provided to activate the maneuvering mode of the control mechanism 12 or the ground compaction roller 1. The switch 19 is present, for example, on the guide rod 7, especially on the operation console 8. In this case, the switch 19 is easily reachable to the operator of the ground compaction roller 1 and can be easily activated. An alternative embodiment of the switch 19 is indicated by a dotted line in FIG. 1 (marked with 19a). In this way, the switch 19a can be similarly arranged, for example, in the guide rod 7 or at the connection position between the guide rod 7 and the rest of the ground compaction roller 1, especially the machine frame 2. At this position, the switch 19a is preferably formed as a contact switch and / or as a push switch / button and preferably detects a force acting on the guide rod 7 applied by the operator. The switch 19a is activated, for example, when the operator pushes the guide rod 7 to the left or right to move the maneuvering motion of the ground compaction roller 1. The control mechanism 12 is activated by the switch 19 / 19a, and then the control mechanism 12 controls the traveling mechanism 13 in the maneuvering mode. The guide rod 7 and, in particular, the operating console 8 are provided with additional operating elements 9, which allow the operator to adjust various parameters of the maneuvering mode as needed. For example, the operator may or may not allow the operating elements 9 to drive the roller drums 4 and 5 in opposite directions of rotation in the maneuvering mode, and / or at least one of the roller drums 4 and 5, especially both roller drums 4 and 5. It is possible to adjust whether or not to operate while changing the rotation direction at a set frequency. In particular, the corresponding rotation direction for operation in the opposite rotation direction can also be adjusted for each of the roller drums 4 and 5. The setting frequency can also be changed by the operator using the operation element 9. However, instead, the setting frequency may be optimized in advance and set fixedly. In that case, the corresponding frequency is stored in the control mechanism 12. Further details regarding the configuration and positioning of the operating elements are described in FIG.

Not only that, the guide rod 7, especially the operation console 8, is also provided with a display mechanism 20 that displays the operation parameters of the ground compaction roller 1 to the operator. The display mechanism 20 displays, for example, which operation mode the ground compaction roller 1 is currently in, for example, the working operation mode or the maneuvering operation mode. Not only that, the rotation directions of the roller drums 4 and 5 are individually displayed. The display mechanism 20 can display any additional parameters as well. Further, in order to assist the rotation of the ground compaction roller 1 on the ground 10 during maneuvering, the roller drums 4 and 5 are provided with a sprinkling mechanism 18 for spraying a fluid, particularly water. The fluid acts as a slip agent, further reducing the friction between the roller drums 4, 5 and the ground 10, thereby facilitating rotary motion and thus maneuvering the ground compaction roller 1.

2 and 3 show the hand-guided ground compaction roller 1 in the working operation mode. In the working operation mode, the roller drums 4 and 5 rotate in the same rotation direction about the rotation shafts 11a and 11b. The directions of rotation are completely opposite in FIGS. 2 (forward) and 3 (backward). In the following, the direction in which the hand-guided ground compaction roller 1 moves due to the rotational movement of the roller drums 4 and 5 in the rotational direction shown in FIG. 2 is referred to as the forward direction A, and the reverse rotation direction shown in FIG. 3 is referred to as the reverse direction. Say. However, since the ground compaction roller 1 can work both forward and backward, this is only an arrangement for facilitating explanation. That is, in the example shown in FIG. 2, the roller drums 4 and 5 are rotating in the forward direction. Therefore, both the drive direction a indicated by the arrow and the movement direction b of the ground compaction roller 1 are directed forward. The drive direction a represents a direction in which the hand-guided ground compaction roller 1 is accelerated based on the rotation of the roller drums 4 and 5. On the other hand, the motion direction b represents the direction in which the hand-guided ground compaction roller 1 actually moves. Based on the inertia of the ground compaction roller 1, the drive direction a and the motion direction b can be separated. FIG. 3 shows a situation completely opposite to that of FIG. 2, and in FIG. 3, the rotation directions of the roller drums 4 and 5 are directed to the reverse direction, and the drive direction a is also the motion direction correspondingly. b is also oriented backwards. As a result, the machine moves in the direction opposite to the forward direction A. That is, the working operation mode of the ground compaction roller 1 is characterized in that the ground compaction roller 1 is stopped, or the drive direction a and the motion direction b are consistently oriented in the same direction.

4 and 5 show an exemplary embodiment of the maneuvering mode of the ground compaction roller 1. Specifically, FIGS. 4 and 5 show the traveling mechanism 13 of the ground compaction roller 1 immediately after the rotation directions of both roller drums 4 and 5 are switched. In FIG. 4, for example, the ground compaction roller 1 was previously operated in forward traveling according to FIG. Therefore, the movement direction b of the ground compaction roller 1 is oriented forward. After that, the rotation directions of the roller drums 4 and 5 are switched, so that the drive direction a is directed backward and opposite to the motion direction b. Based on this combination, the roller drums 4 and 5 slide on the ground 10, whereby the static friction between the roller drums 4 and 5 and the ground 10 becomes the sliding friction, and this sliding friction is only a part of the static friction. This effect makes the ground compaction roller 1 considerably easier to maneuver. However, since the sliding state between the roller drums 4 and 5 and the ground 10 lasts only for a short time, in order to maintain the easy maneuvering, the rotation direction of the roller drums 4 and 5 is reversed again after a short acceleration. It is necessary to switch the direction, for example, as suggested in FIG. In FIG. 5, the motion direction b of the ground compaction roller 1 is reversed. The rotation direction of the roller drums 4 and 5 was switched again, and the reversal of the drive direction a in the forward direction was achieved, so that the sliding state between the roller drums 4 and 5 and the ground 10 was established again. That is, in particular, in the maneuvering mode shown, by changing the rotation direction of the roller drums 4 and 5 at a set frequency, the sliding state between the roller drums 4 and 5 and the ground 10 is continuously maintained, and thus the ground compaction roller 1 The control mechanism 12 controls the roller drums 4 and 5 so that the roller drums 4 and 5 can be easily operated. By optimizing the setting frequency or the time interval that is too long between the switching of the rotation direction, it is possible to achieve a state in which the ground compaction roller 1 does not actually travel a distance in the maneuvering mode. By using the control mechanism 12 that maintains the maneuvering mode according to the present invention, it is possible to achieve a state in which the facilitated maneuvering of the ground compaction roller 1 lasts for an arbitrary length.

6 and 7 show a further embodiment of the maneuvering mode. As suggested by the arrows, the roller drums 4 and 5 are operated in opposite directions of rotation in FIGS. 6 and 7. Based on this, the ground compaction roller 1 is not accelerated forward or backward, and is therefore stopped or stopped. At the same time, the roller drums 4 and 5 spin on the ground 10, and therefore there is a sliding friction between the ground 10 and the roller drums 4 and 5, which makes the ground compaction roller 1 maneuver considerably easier. Which of the rotation directions of the roller drums 4 and 5 shown in FIGS. 6 and 7 is used can be adjusted by the operator, for example, by the operation element 9. Depending on the ground material of the ground 10, one or the other direction of rotation can make the load lighter. Not only that, the operator chooses whether to implement the maneuvering mode according to FIGS. 4 and 5, or the maneuvering mode according to FIGS. 6 and 7, or the combined maneuvering mode. You can also do it.

Finally, FIG. 8 relates to a third variant of the maneuvering mode. Here, one of the two roller drums, 4 is blocked, and it is intended that it cannot rotate in this state. On the other hand, the other 5 of both roller drums rotates about the rotation shaft 11b. Therefore, in this modified form, only one of the two roller drums rotates, and the other roller drum is locked at that rotational position, for example by a hydraulic lock. The sliding friction thus achieved with one roller drum 5 also considerably facilitates the maneuvering process.

FIG. 9 illustrates the temporal transition of the roller drums 4 and 5 in the rotational direction when the ground compaction roller 1 is switched between the working operation mode and the maneuvering operation mode. In this regard, the solid line represents the first roller drum 4 and the dotted line represents the second roller drum 5. If each line is arranged above the time axis t, the respective roller drums 4 and 5 rotate in the forward direction. As suggested by the arrows, if each line is arranged below the time axis t, the respective roller drums 4 and 5 rotate in the reverse direction. The exemplary operating flow shown in FIG. 9 begins on the left side with the ground compaction roller 1 in working mode and forward travel, in which both roller drums 4 and 5 are driven in the forward direction. (Area A). Next, the rotation directions of the roller drums 4 and 5 are switched, and the ground compaction roller 1 is operated in reverse travel for a while (region B). Next, the ground compaction roller 1 is operated here. For this reason, the maneuvering mode is activated, and the control mechanism, for example, the hydrostatic traveling drive unit is appropriately switched between both roller drums 4 and 5, so that both roller drums 4 and 5 rotate in opposite directions. (Area C). In the illustrated embodiment, the first roller drum 4 is operated in the forward direction and the second roller drum 5 is operated in the reverse direction. The resulting slip condition between the roller drums 4, 5 and the ground 10 is ground compaction by the operator pushing or pulling the guide rod 7 to adjust the orientation of the ground compaction rollers 1 as needed. It is used for maneuvering the roller 1. Subsequently, the maneuvering operation mode is terminated, and the ground compaction roller 1 is operated again in the working operation mode. A relatively long forward run is performed (region D). After that, the maneuvering operation mode is activated again, but this time, the operation is performed while changing the rotation directions of both roller drums 4 and 5 at a set frequency controlled by the control mechanism (area E). As suggested in FIG. 9, the rotation directions of the roller drums 4 and 5 are switched each time after the time interval Δt elapses. This also achieves a sliding state between the roller drums 4, 5 and the ground 10, thus facilitating maneuvering of the ground compaction roller 1. In this regard, in this exemplary embodiment both roller drums are rotated in the same direction. This switching may be combined with region C, in which case both roller drums are alternately rotated in opposite directions. The ground compaction roller 1 is therefore reoriented by the operator pulling or pushing the guide rod 7, and then exits the maneuvering mode. In the flow diagram shown, the ground compaction roller 1 is subsequently further driven backward (region F). Finally, region G illustrates further alternatives to the maneuvering mode. Here, the first roller drum 4 is stopped based on the interruption, and only the second roller drum 5 rotates.

FIG. 10 shows the connection of the control mechanism 12 and the control mechanism 12 to additional elements of the ground compaction roller 1. In the illustrated embodiment, the control mechanism 12 is connected to the operating element 9 and the switch 19. However, it is similarly well possible to combine the operating elements 9 and the switch 19 into one operating element, for example, on the operating console 8. Through the operating element 9 and the switch 19, the control mechanism 12 receives the control command of the operator of the ground compaction roller 1. In particular, the control mechanism 12 receives information from the operator's input about when and how the maneuvering mode should be activated and implemented. The control mechanism 12 then controls a drive unit 21, which may be, for example, a conduction device, particularly a hydraulic conduction device. By this drive unit 21, the control mechanism 12 controls the rotation directions of the roller drums 4 and 5 especially in the maneuvering operation mode. Not only that, the control mechanism 12 is also connected to a display mechanism 20 that notifies the operator of the status of the traveling mechanism 13, particularly the rotation directions of the roller drums 4 and 5.

FIG. 11 shows a flow chart of a method 14 according to the present invention for maneuvering a hand-guided ground compaction roller 1. This method specifically includes switching the operation mode of the ground compaction roller 1 from the work operation mode to the maneuvering operation mode 15. Next, the operation 16 of the ground compaction roller 1 in the maneuvering operation mode by the control mechanism 12 is performed as described above. The maneuvering mode is maintained by the control mechanism 12 until the operator issues a corresponding control command or a set time interval elapses. During the maneuvering mode, the friction between the roller drums 4, 5 and the ground 10 is reduced by the occurrence of a slip condition. Therefore, the operator can easily change the direction of the ground compaction roller 1 in a desired direction during the maneuvering operation state. After that, the operation mode of the ground compaction roller is returned 17 from the maneuvering operation mode to the working operation mode. In short, the present invention makes it possible to facilitate the maneuvering of the ground compaction roller 1 at the same time as a simple design and low manufacturing cost.

The partial oblique perspective view based on FIG. 12 schematically illustrates various configurations and positionings of the operating element 9 and the switch 19. The guide rod 7 has a connecting bar 22, which at one end is connected to the machine frame of the machine, for example, directly or indirectly via a damper mechanism. At the other end, the guide rod 7 has an operating console 8 with rising handles 23 on both sides. Further there is a throttle lever 24 that allows the operator to change the frequency of one or more imbalance generators located within the roller drum 4 and / or 5. On the other hand, a driving lever (traveling lever / drive lever) 100 is provided for adjusting and controlling the traveling speed, and the operating lever 100 is used to adjust the traveling speed in the forward direction and vice versa. Can be adjusted for. Here, the guide rod 7 may be provided with a plurality of switches 19 / operating elements 9 for activating / deactivating the maneuvering mode, and the examples shown below may be used alone or in combination. Can be placed in. For one thing, as shown by the switch 19a in FIG. 12, a contact switch can be provided in the connection region between the connection bar and the machine frame. This position has the advantage that when the guide rod is moved to the right or left, the maximum lever acting force is provided there, which results in successful reliable and comfortable operation of the switch 19a. Alternatively, the switch 19a may be formed to be activated and deactivated by a rotational motion about the longitudinal axis K of the connection bar 22. It may be replenished or / or replaced with switches 19b and / or 19c in the grip area of the handle and / or operating lever 100, among other things the operating lever as shown by switches 19b and 19c in FIG. It can be placed on both sides of 100. Therefore, the positions of the switches 19b and 19c on the guide rod change with the adjustment of the operating lever 100, which allows switching between the two modes, which is particularly smooth and comfortable for the operator. A further alternative is to place the operating element 9 / switch 19d in the area of the operating console 8. In FIG. 12, the switch 19d formed as a rocker switch activates, for example, only the maneuvering mode when activated. However, a switch formed by combining, for example, the speed or direction of rotation, and thus in this case as an operation switching element 9/19, depending on how wide and / or strong the switch 19 is operated. It can also be changed by 19d. Finally, one additional alternative arrangement is to mount the switch 19e in the area between the handles 23 above the operating console. To this end, the switch 19e is located below the connecting rod 25 of the operating lever 100 between both handles 23. As a result, the operator can easily place his / her hand on the horizontal bar 25, and by grasping it, the switch 19e positioned on the lower side can be activated, and at the same time, the maneuvering process can be performed with the other hand. Therefore, this positioning of the switch 19e also feels particularly comfortable. Further, the guide rod has an additional operating element 9 and a display mechanism 20. By the display mechanism 20, for example, the operation mode (steering operation mode, working operation mode) at that time, the type of maneuvering operation mode (reverse direction, switching, drum block, switching frequency, ground type, soft / medium / hard, etc.), And / or additional information can be displayed.

Finally, FIG. 13 shows an outline of the hydraulic system 26 of the hand-guided ground compaction roller according to the present invention. First, the hydraulic system includes two hydraulic motors 27a and 27b that achieve rotational movement of the roller drums 4 and 5 around their rotating shafts 11a and 11b. There is one hydraulic pump 28 to drive both hydraulic motors 27a and 27b. Therefore, both hydraulic motors 27a and 27b are connected in series. The hydraulic system 26 is further installed between both hydraulic motors 27a and 27b in the hydraulic circuit and includes a control block 29 formed as a functional unit. The control block 29 is provided with a connection portion A and at least indirectly a connection portion B (directly via a pump connection portion) with respect to the hydraulic motor 27a (via a pump connected between them). Connection portions A1 and B1 are provided for the pressure motor 27b. The essential element of the control block 29 is the 4/2 way valve 30 controlled by the control mechanism 12 shown in FIG. At the position of the valve 30 shown in FIG. 13, both hydraulic motors 27a and 27b work in the same direction (for example, corresponding to FIG. 2). On the other hand, when the valve 30 is set to the other position by the control mechanism 12 in the maneuvering operation mode, both hydraulic motors 27a and 27b work in opposite directions (for example, corresponding to FIG. 6). Further, a part of the control block 29 is two pressure limiting valves 31a and 31b. The pressure limiting valves 31a and 31b are connected to the fluid tank via a conduit 32. Using pressure limiting valves 31a and 31b and conduit 32, the control block 29 provides, on the one hand, the ability to dampen pressure peaks that can occur in the hydraulic system, for example during a sudden reversal of rotation of one of the motors 27a and 27b. Obtainable. On the other hand, this provides a resupply function for the hydraulic fluid for the hydraulic circuit. By doing so, the hydraulic system can be operated particularly reliably.

1 Hand-guided ground compaction roller 2 Machine frame 3 Drive motor 4 First roller drum 5 Second roller drum 7 Guide rod (guide bracket)
9 Operation element 10 Ground 12 Control mechanism 13 Travel mechanism 14 Method 15 Switching 16 Operation 17 Return 18 Watering mechanism 19 Switch 100 Operation lever

Claims (13)

A hand-guided ground compaction roller (1)
-Machine frame (2) and
-The drive motor (3) supported by the mechanical frame (2) and
-It includes a first roller drum (4) driven by the drive motor (3) and a second roller drum (5) arranged behind the first roller drum (4) in the forward direction. , A traveling mechanism (13) capable of causing the hand-guided ground compaction roller (1) to travel on the ground (10).
-A guide rod (7) formed for the user to manually control the hand-guided ground compaction roller (1), and
Have,
The ground compaction roller (1) can be operated in a work operation mode in which the roller drums (4, 5) are stopped or are operated in forward or reverse travel in the same rotational direction.
A control mechanism (12) exists for the operation of the hand-guided ground compaction roller (1) in the maneuvering mode, and the control mechanism (12) is phased forward and backward in the forward direction in the maneuvering mode. The roller drums (4, 5) arranged in the above direction
a) Operate so that one rotation direction of the roller drums (4, 5) is opposite to the rotation direction of the other roller drum (4, 5), and / or b) The roller drum (4, 5). 5) block one of the roller drums (4, 5) and rotate the other in the direction of rotation to operate, and / or c) at least one roller drum (4, 5) at a set frequency. It is formed so as to operate while changing the rotation direction between a predetermined rotation direction and a rotation direction opposite to the predetermined rotation direction.
A hand-guided ground compaction roller (1). The setting frequency is at least one rotation direction change per second.
The hand-guided ground compaction roller (1) according to claim 1. The control mechanism
a) To control a single set frequency
b) Designed for control by at least two of the above set frequencies that the operator can select.
c) The operator can adjust steplessly within the set frequency range.
Is formed,
The hand-guided ground compaction roller (1) according to claim 2. The control mechanism has the following features: -in the maneuvering mode, the rotational speed of at least one of the roller drums is constant.
-In the maneuvering mode, the operator can change the rotation speed of at least one of the roller drums.
-The rotation speed can be selected between at least two modes.
Formed to satisfy at least one of
The hand-guided ground compaction roller (1) according to claim 1. The control mechanism is formed to include a selectability that can be selected between at least two different maneuvering modes, depending on the nature of the ground.
The hand-guided ground compaction roller (1) according to claim 3 or 4. The operating element (9) is present, and the operating element (9) allows the operator to select the rotation direction and / or conversion frequency and / or rotation speed of the roller drum (4, 5) in the maneuvering operation mode. it can,
The hand-guided ground compaction roller (1) according to any one of claims 1 to 5. A switch (19) capable of switching the control mechanism (12) between the working operation mode and the maneuvering operation mode is provided.
The hand-guided ground compaction roller (1) according to any one of claims 1 to 6. The switch (19) can be moved by the pressure applied to the guide rod (7) by the operator.
The hand-guided ground compaction roller (1) according to claim 7. The switch (19) is formed so as to self-return from the maneuvering operation mode to the working operation mode.
The hand-guided ground compaction roller (1) according to claim 7 or 8. At least one of the roller drums (4, 5) is provided with a watering mechanism (18) formed to spray the fluid.
The hand-guided ground compaction roller (1) according to any one of claims 1 to 9. The watering mechanism includes the following features: -a maneuvering reserve that corresponds exclusively to the fluid volume set for the maneuvering process during the maneuvering process.
-Contains a tank exclusively for the fluid for the maneuvering process,
-A fluid for the maneuvering process in the forward and / or reverse direction and / or vice versa in front of the contact area between one of the two roller drums (4, 5) and the ground. Including a pressure source that allows direct sowing,
-Includes spray mode "maneuver" and spray mode "compact",
Have at least one of
The hand-guided ground compaction roller (1) according to claim 10. The method (14) for maneuvering the hand-guided ground compaction roller (1) according to any one of claims 1 to 11.
-Ground compaction from the work operation mode in which the first roller drum (4) and the second roller drum (5) are stopped or operated in the same rotation direction in forward or reverse travel to the maneuvering mode. Step (15) to switch the operation mode of the roller (1) and
-The roller drums (4, 5) are operated so that one of the roller drums (4, 5) rotates in the opposite direction to the other of the roller drums (4, 5) in the maneuvering mode. As such, and / or at least one of the roller drums (4, 5) is operated at a set frequency while changing the rotation direction between a predetermined rotation direction and a rotation direction opposite to the predetermined rotation direction. Control mechanism of the ground compaction roller (1) so that and / or one roller drum (4, 5) is blocked and the other roller drum (4, 5) is operated to rotate. In step (16) of driving in the maneuvering mode according to (12),
-In the step (17) of returning the operation mode of the ground compaction roller (1) from the maneuvering operation mode to the working operation mode,
Including,
How to operate the hand-guided ground compaction roller (1) (14). The step (17) of returning the operation mode of the ground compaction roller (1) from the maneuvering operation mode to the working operation mode is automatically performed.
12. The method according to claim 12 (14).

Images