EP3719206B1 - Ground compacting device control device - Google Patents

Ground compacting device control device Download PDF

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Publication number
EP3719206B1
EP3719206B1 EP20162351.9A EP20162351A EP3719206B1 EP 3719206 B1 EP3719206 B1 EP 3719206B1 EP 20162351 A EP20162351 A EP 20162351A EP 3719206 B1 EP3719206 B1 EP 3719206B1
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EP
European Patent Office
Prior art keywords
operating element
control device
latching
pressure piece
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20162351.9A
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German (de)
French (fr)
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EP3719206A1 (en
Inventor
Ferdinand Rupp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wacker Neuson Produktion GmbH and Co KG
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Wacker Neuson Produktion GmbH and Co KG
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Publication of EP3719206A1 publication Critical patent/EP3719206A1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/074—Vibrating apparatus operating with systems involving rotary unbalanced masses
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/40—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers
    • E01C19/402—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers the tools being hand-guided
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for

Definitions

  • the invention relates to a control device for a soil compacting device.
  • Hand-guided, reversible vibrating plates are known in particular as such a soil compacting device.
  • Such vibrating plates have a ground contact plate on which an unbalance exciter is mounted, which has, for example, two counter-rotating imbalance shafts, which can be set in opposite directions by a drive.
  • the rotation of the imbalance shafts in the imbalance exciter generates vibrations that can be used in a known manner for soil compaction.
  • a longitudinally extending drawbar is provided on the vibrating plate, at the end of which (drawbar head) there is a switching bracket, via which an operator can not only steer and guide the vibrating plate, but also adjust the running direction of the vibrating plate.
  • imbalance exciters are known in which the relative phase position of the acting imbalance shafts can be changed to one another in order to change the effective direction of the resulting vibration vectors.
  • the running direction of the vibration plate can be determined depending on whether a resulting vibration vector is directed in the forward direction or in the reverse direction.
  • the switchover bar belonging to a control device for the vibration plate is generally very stable and on the one hand enables the operator to guide and steer the vibration plate.
  • the switching bracket is designed as a large hand lever and can be pivoted relative to the tiller head to which it is attached. By pivoting the switching bracket relative to the tiller head, a hydraulic signal is generated which can be transmitted to the imbalance exciter in the vibration plate in order to determine or change the phase position of the counter-rotating imbalance shafts in a known manner.
  • the running direction (forwards, backwards) of the vibration plate can be adjusted with the help of the switching bracket.
  • Fig. 12 shows an example of such a known control device for a vibrating plate.
  • a tiller head At the end of a tiller, not shown, there is a tiller head with a control housing 1 on which a switching bracket serving as an operating element 2 is pivotally mounted.
  • the switching bracket 2 can be pivoted about an axis 3 relative to the control housing 1 .
  • a master piston 4 is arranged in the interior of the control housing 1 and can be moved back and forth axially in a master cylinder 5 formed in the interior of the control housing 1 .
  • a piston rod 6 which carries a toothed rack 7 is formed as part of the master piston 4 or in its axial extension.
  • the rack 7 meshes with a pinion 8 which is fixed on the axle 3.
  • a pivoting of the switching bracket 2 causes a rotation of the pinion 8 and thus a linear displacement of the toothed rack 7, the piston rod 6 and the master piston 4.
  • a cylinder chamber 9 is provided on the front side in front of the master piston 4 and can be filled with a hydraulic fluid.
  • the cylinder chamber 9 is connected via a hydraulic connection 10 and a hydraulic line, not shown, to a corresponding slave cylinder or slave piston in an imbalance exciter, also not shown, of the vibration plate. Due to the hydraulic coupling of the cylinder chamber 9 to the imbalance exciter, an adjustment or displacement of the master piston 4 thus causes a corresponding twisting of the imbalance shafts or imbalance masses in the imbalance exciter, not shown. As a result, the phase position of the counter-rotating imbalance shafts can be adjusted.
  • the resultant force vector of the imbalance exciter and thus the running direction of the vibration plate can thus be adjusted with the aid of the switching bracket 2 .
  • the master piston 4 is in its foremost position and accordingly the cylinder chamber 9 has only a very small volume.
  • the cylinder chamber 9 resembles a thin cylindrical disk.
  • a spring 11 which pushes the master piston 4 into the in 1 position shown presses or supports a movement in this direction to the located in the cylinder chamber 9 Press out hydraulic fluid via the hydraulic connection 10. Due to their inertia, the imbalance shafts or imbalance masses rotating in the imbalance exciter cause a restoring torque that acts on the hydraulic device in the imbalance exciter and must be held by the master piston 4 . In other words, the restoring torque causes a force on the master piston 4, which forces it out of the 1 shown maximum position. This force must be held by master piston 4 to maintain maximum forward travel.
  • the spring 11 has a supporting effect so that the holding force on the master piston 4 does not have to be applied exclusively by the operator via the operating lever 2 .
  • the switching bracket 2 can be pivoted backwards, in the direction of arrow R, by a specific angle, e.g. 40 degrees.
  • the pinion 8 is then rotated and also pulls the piston rod 6 and the master piston 4 back in the direction of arrow R via the toothed rack 7 .
  • This increases the volume in the cylinder chamber 9 and hydraulic fluid is admitted via the hydraulic connection 10 .
  • the imbalance shafts in the imbalance exciter which are connected via the communicating hydraulics, can rotate with regard to their rotational position and phase position, so that ultimately the vibration plate can move backwards as far as possible.
  • the switching bar 2 is in the middle, ie between the maximum forward drive and the maximum reverse drive, the so-called stationary vibration occurs, in which the vibrating plate vibrates standing on the spot in order to bring about local compaction. Between the extreme positions of the switching bracket 2, any intermediate positions are steplessly possible.
  • the spring 11 which supports the movement of the master piston 4 against the hydraulic pressure in the cylinder chamber 9 inherent to the principle.
  • the spring force of the spring 11 can be designed in such a way that when the switching bracket 2 is released, a stationary vibration is automatically set, ie the vibrating plate automatically brings its feed movement to a standstill.
  • Such a control device is, for example, from DE 40 16 822 A1 famous.
  • control device described has proven very effective in practice and is particularly suitable for inexperienced drivers, since the machine always moves in the direction in which the operator is holding the switch bar.
  • a control device for a vibratory roller on which a latchable operating lever with a neutral center position and a driving position for forward and reverse travel is arranged.
  • the invention is based on the object of specifying a control device for a soil compaction device, through which the soil compaction device, in particular a vibrating plate, can be operated at full forward travel, even if the operator has released a corresponding operating element. It should be possible for the operator to actuate the control element provided for him at any time in order to control the machine and, in particular, to stop it or drive it in reverse.
  • the control device should at least enable the precise setting of a center position for stationary vibration of the soil compacting device.
  • a control device with the features of claim 1.
  • Advantageous configurations are specified in the dependent claims.
  • a vibrating plate serving as a soil compacting device equipped with the control device is provided.
  • a control device for a soil compacting device is specified, with a movable operating element for specifying a running direction of the soil compacting device by an operator; with a hydraulic master device, with a master cylinder in which a master piston can be moved back and forth linearly, for generating a hydraulic signal; with a hydraulic connection for coupling hydraulic components of the soil compacting device and for transmitting the hydraulic signal from the transmitter device; and with a transmission device for transmitting the movement of the operating element into a linear movement of the master piston; wherein the operating member between a first position and a second position is movable, wherein the first position corresponds to a maximum forward travel of the soil compacting device and wherein the second position corresponds to a maximum reverse travel of the soil compacting device; and wherein a latch means is provided for releasably holding the operating member in a predetermined position.
  • the predetermined position can be the first position, ie the position for maximum forward travel. However, it can also be another defined position, for example a position that lies between
  • the operating element can be designed, for example, as a switching bar, in particular as a handle bar, hand lever, sliding element or guide bar.
  • a switchover bracket is to be understood broadly.
  • the operating element can be moved relative to a holder (e.g. a tiller head) in order to achieve the two desired positions of the operating element.
  • the operating element can perform a linear movement or, in particular, a pivoting movement.
  • the movement of the operating element is transmitted to the master piston.
  • the master piston thus performs a movement corresponding to the movement of the operating element.
  • the master piston as part of the hydraulic master device generates the hydraulic signal in cooperation with the hydraulics or a hydraulic fluid, which can be transmitted to further hydraulic components of the soil compacting device via the hydraulic connection and optionally further components (hydraulic line).
  • This is in particular a hydraulically adjustable imbalance exciter that can be adjusted in this way with the help of the operating element.
  • control device can be separated from the actual soil compaction device, e.g. a vibratory plate, and has appropriate mechanical (e.g. attachment via a tiller head to a tiller of the vibratory plate) and hydraulic coupling options (hydraulic connection).
  • the locking device is able to hold the operating element in the predetermined position.
  • the predetermined position can be selected in a suitable manner, for example to effect forward travel at a specific speed. For example, forward travel at a low speed, below the maximum forward travel, can also be achieved.
  • the latching device it is also possible to vary the predetermined position in order to be able to hold the operating element in different positions and thus fix it.
  • the operator has the possibility, by setting the latching device, to specify a specific speed that is suitable for the current application in the form of a position of the operating element and also to hold the operating element in this position.
  • the predetermined position may be the first position, that is, the position for maximum forward travel.
  • the locking device is then able to hold the operating element in the first position. As a result, maximum forward travel can be maintained even if the operator no longer holds the operating element in this position but lets go.
  • the operating element can be releasably held by the latching device in such a way that the operating element can be moved out of the predetermined position by the operator using his manual force by overcoming the latching device.
  • the operating element should therefore only be held "releasably" in the predetermined position, e.g. the first position, so that it can easily be brought back into another position by the operator acting on the operating element.
  • the operator must always be able to move the control element out of the predetermined or first position, i.e. to release it, in order to stop maximum forward travel, for example.
  • the detachability of the operating element from the predetermined or first position thus means that the operator can release the holding state with his normal manual strength. Of course, the operator must not first have to destroy any connecting means (cutting through a retaining wire, etc.).
  • the latching device can be switched into two operating states, namely a first operating state in which the latching device can be used to detachably hold the operating element in the predetermined or first position, and a second operating state in which the latching device is ineffective.
  • the locking device can be activated or as desired be deactivated.
  • the latch When the latch is activated, it can perform the desired function of releasably holding the control in the first position.
  • the locking device is deactivated, it remains ineffective and does not hold the operating element even when it is in the first position.
  • the operating element is held in the first position, ie in the position for maximum forward travel, only if the operator also wishes this by activating the latching device.
  • the function of the latching device can be deactivated.
  • the operating element can be moved in such a way that it can be pivoted about an axis, and the transmission device can be designed to transfer the pivoting movement of the operating element into a linear movement of the master piston.
  • the operating element can in particular be a pivotable switching bracket, the movement of which is then transferred in a suitable manner to the linear movement of the master piston.
  • a control housing can be provided on which the operating element is movably held, it being possible for the master cylinder and the master piston to be arranged in the control housing.
  • the control housing can be formed in particular in the tiller head, which in turn can be fastened to the end of a tiller which is part of the soil compacting device.
  • the transmission device can have a pinion shaft coupled to the operating element and a toothed rack coupled to the master piston, the pinion shaft meshing with the toothed rack such that rotation of the pinion shaft causes a linear displacement of the toothed rack.
  • the toothed rack can be coupled to a piston rod forming part of the master piston or can be formed in the piston rod as part of the master piston.
  • the shifting of the toothed rack thus also causes a shifting of the master piston.
  • the latching device can have a pressure piece with a resiliently mounted latching element, the latching device also having a recess can, in which the locking element can be inserted, and wherein the recess can be formed on the transmission device or on the master piston.
  • the pressure piece can be mounted in the control housing.
  • the locking element can be designed as a locking pin and can be held in the pressure piece so that it can move against a spring.
  • the pressure piece can be mounted in the control housing, the recess being formed on the master piston or in the pinion shaft and the latching element being inserted into the recess when the operating element is in the predetermined position, e.g. the first position. It is thus possible for the latching to take place, for example, via the master piston or the piston rod. However, it can also take place via the pinion shaft or via the switching bracket if corresponding locking elements and a suitable recess are formed there.
  • the piston rod can be locked.
  • the pinion shaft or the switching bracket can be locked.
  • the outer surface of the pinion shaft has a suitable locking geometry (recess), for example a spherical cap.
  • a corresponding effect can also be implemented on the switching bracket. It is also possible to fasten the pressure piece on the outside, i.e. outside of the tiller head or the control housing.
  • the master piston can have a piston rod, in or on which the toothed rack is formed, wherein the recess can be formed in the piston rod and wherein in a longitudinal direction of the piston rod, offset to the recess, a further longitudinally extending recess can be formed as a clearance.
  • the clearance can be provided in order to rule out friction on the latching element or the latching pin in the area between stationary shaking or slight forward travel and full reverse travel. There should therefore be as little friction as possible between the latching element and the piston rod in the areas outside of full forward travel, in order to ensure good mobility of the piston rod and the master piston.
  • the pressure piece can be movably mounted in the control housing between two positions, with the first position of the pressure piece being defined in such a way that the locking element of the pressure piece can be inserted into the recess, while the second position of the pressure piece can be defined in such a way that the locking element is not in the recess can be inserted.
  • a switching device be provided for defined movement and holding of the pressure piece in the first position or in the second position.
  • the first position means that the self-sustaining forward drive can be switched on, ie activated.
  • the locking device can fulfill the intended function.
  • the latching device is deactivated, that is to say switched off and ineffective.
  • the activation or deactivation state of the locking device can thus be realized by the two positions of the pressure piece.
  • the pressure piece can be mounted in particular so that it can be displaced between the two positions.
  • the switching device for changing the positions of the pressure piece can have a pivotable lever with an eccentric geometry, it being possible for the lever to be pivotable into two defined positions corresponding to the two positions of the pressure piece. With the help of the lever it is thus possible to change the position of the pressure piece and to determine the two defined positions (first position and second position) in order in this way to activate or deactivate the latching device.
  • the operating element can be pivoted into a third position provided between the first position and the second position, which corresponds to a standstill of the soil compacting device.
  • standstill means a state in which the soil compacting device generates vibrations for soil compaction, but no advance.
  • the soil compaction device thus does not move from the spot, but causes a static vibration.
  • the soil compaction device can advantageously be a vibratory plate.
  • a vibrating plate is also specified, which can be equipped with a control device of the type described above.
  • control device that is largely analogous to that known from the prior art and above with reference to FIG Figures 1 and 2 described control device is constructed. To avoid repetition, the same components are therefore also identified with the same reference symbols. In addition, reference is made to the above description with regard to the general functioning of the control device.
  • the control device has the switching bracket 2 that can be pivoted relative to the control housing 1 .
  • the switching bracket 2 When the switching bracket 2 is pivoted, the pinion 8 is rotated about the axis 3, as a result of which the toothed rack 7 meshing with the pinion 8 is linearly displaced.
  • the toothed rack 7 is formed in one piece together with the piston rod 6 and the master piston 4, so that a common displacement of the master piston 4 is effected. Accordingly, a hydraulic signal can be transmitted via the hydraulic connection 10 to the soil compacting device (not shown), in particular to the imbalance exciter in a vibrating plate.
  • the switching bar 2 does not necessarily have to be designed as a bar-shaped operating element, but can also have another suitable design that allows the machine to be operated.
  • a latching device 20 is provided.
  • the latching device 20 has a pressure piece 21 inside which a latching pin 22 serving as a latching element can be displaced against the action of a spring 23 .
  • the locking pin 22 enters at one end of the pressure piece 21 (in 3 the top end).
  • the front end of the locking pin 22 is hemispherical or dome-shaped and penetrates into a recess 24 in the piston rod 6 .
  • the recess 24 thus serves as a detent notch into which the detent pin 22 of the pressure piece 21 can engage.
  • the switching bracket 2 can be set in a position other than that in 3 shown position for maximum forward travel.
  • the latching device 20 with the recess 24 can be positioned in such a way that the switching bracket 2 latches in a position that corresponds to reduced, ie slowed, forward travel.
  • Safety considerations can thus be taken into account, so that the vibrating plate cannot move forward without being checked by the operator at maximum forward speed, but only at reduced forward speed.
  • the locking pin 22 of the pressure piece 21 is spring-loaded, the spring force being large enough to move the master piston 4, which experiences a system-related restoring force, at the front, i.e. in the in 3 shown full forward travel.
  • the switching bar can then be released by the operator and still does not move automatically into the neutral position for stationary vibration.
  • the locking pin 22 When self-retaining forward travel is switched on (activation of the locking device), the locking pin 22 only rests against the left flank of the recess 24 and is already slightly pressed into the pressure piece 21, i.e. the top of the collar of the locking pin 22 is free. This ensures that the master piston 4 is always pushed forward (in the direction of V) fully and without play.
  • a clearance 25 is formed in the piston rod 6 next to the recess 24 .
  • the tip of the locking pin 22 can penetrate here without achieving a locking effect.
  • the clearance 25 can also be formed so deep that the locking pin 22 does not touch the piston rod 6 and no frictional effect is generated between the two components.
  • the complete pressure piece 21 including the locking pin 22 is movably mounted in the control housing 1 in the axial direction. Like comparing the 3 and 4 shows, the pressure piece 21 can thus be moved between two positions and locked in the respective positions. In a first position ( 3 ) it is possible that the tip of the locking pin 22 can penetrate into the recess 24 of the piston rod 6, as explained above.
  • a switching lever 26 is provided which has an eccentric outer surface 27 and can be pivoted about an axis of rotation 28, as also in FIGS 3 and 4 shown.
  • the distance between the eccentric outer surface 27 contacting the pressure piece 21 and the axis of rotation 28 of the switching lever 26 is greater than in the case of FIG 4 shown position. Accordingly, the pressure piece 21 in the in 3 pressed in the direction of the recess 24 shown position.
  • the operator In normal working operation of the soil compacting device, the operator will usually set the maximum forward drive in order to achieve a quick work result.
  • the described latching of the switching bracket 2 can be helpful because it allows the operator to let go of the switching bracket 2 and still maintain maximum forward travel.
  • the locking or holding mechanism can be overridden. To do this, the operator pulls back the switch bar 2 as usual, but with a little more effort.
  • the locking pin 22 is pressed against the spring force in the pressure piece 21 until the limitation of the recess 24 is completely overcome. Then the locking pin 22 can disengage again.
  • the disengaged locking pin 22 now lies with its collar within the pressure piece 21 and moves in the clearance 25, i.e. without contact with the piston rod 6. No additional friction is thus generated between the piston rod 6 and the locking pin 22, which also allows the vibration plate to to go automatically from reversing or, if necessary, from slight forward travel to stationary shaking when self-retaining forward travel is switched on (activated locking device).
  • the pressure piece 21 can also be provided with an external thread and screwed into the control housing 1 or the tiller head by means of a tool. In this case, it is not possible to connect without tools.
  • the pressure piece 21 can be provided with a coarse thread and can be screwed in or out by hand using a rotary lever up to the respective end stops, which means that it can be switched on without tools.
  • the thread can be selected in such a way that just half a turn is sufficient to switch it on or off (activation and deactivation of the latching device).
  • the locking pin 22 serving as a locking element can also be replaced by a spring-loaded ball.
  • the pressure piece 21 can also be implemented as a standard ball pressure piece.
  • the pressure piece 21 and thus the entire latching device 20 do not have to - as in 3 shown - be arranged from below. An arrangement from above or from the side is also possible.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
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Description

Die Erfindung betrifft eine Steuervorrichtung für eine Bodenverdichtungsvorrichtung.The invention relates to a control device for a soil compacting device.

Als eine derartige Bodenverdichtungsvorrichtung sind insbesondere handgeführte reversierbare Vibrationsplatten (Rüttelplatten) bekannt. Derartige Vibrationsplatten weisen eine Bodenkontaktplatte auf, auf der ein Unwuchterreger montiert ist, der z.B. zwei gegenläufig drehbare Unwuchtwellen aufweist, die von einem Antrieb in gegenläufige Rotation versetzt werden können. Durch die Rotation der Unwuchtwellen im Unwuchterreger werden Vibrationen erzeugt, die zur Bodenverdichtung in bekannter Weise genutzt werden können.Hand-guided, reversible vibrating plates (vibrating plates) are known in particular as such a soil compacting device. Such vibrating plates have a ground contact plate on which an unbalance exciter is mounted, which has, for example, two counter-rotating imbalance shafts, which can be set in opposite directions by a drive. The rotation of the imbalance shafts in the imbalance exciter generates vibrations that can be used in a known manner for soil compaction.

An der Vibrationsplatte ist eine sich längserstreckende Deichsel vorgesehen, an deren Ende (Deichselkopf) ein Umschaltbügel vorgesehen ist, über den ein Bediener nicht nur die Vibrationsplatte lenken und führen kann, sondern auch die Laufrichtung der Vibrationsplatte einstellen kann. Hierzu sind Unwuchterreger bekannt, bei denen die relative Phasenlage der wirkenden Unwuchtwellen zueinander verändert werden kann, um die Wirkrichtung der resultierenden Schwingungsvektoren zu verändern. Je nachdem, ob ein resultierender Schwingungsvektor in Vorwärtsfahrt- oder in Rückwärtsfahrt-Richtung gerichtet ist, lässt sich die Laufrichtung der Vibrationsplatte bestimmen.A longitudinally extending drawbar is provided on the vibrating plate, at the end of which (drawbar head) there is a switching bracket, via which an operator can not only steer and guide the vibrating plate, but also adjust the running direction of the vibrating plate. For this purpose, imbalance exciters are known in which the relative phase position of the acting imbalance shafts can be changed to one another in order to change the effective direction of the resulting vibration vectors. The running direction of the vibration plate can be determined depending on whether a resulting vibration vector is directed in the forward direction or in the reverse direction.

Der zu einer Steuervorrichtung für die Vibrationsplatte gehörende Umschaltbügel ist in der Regel sehr stabil ausgeführt und ermöglicht es dem Bediener einerseits, die Vibrationsplatte zu führen und zu lenken. Andererseits ist der Umschaltbügel als großer Handhebel ausgeführt und kann relativ zu dem Deichselkopf, an dem er befestigt ist, verschwenkt werden. Durch das Verschwenken des Umschaltbügels relativ zum Deichselkopf wird ein hydraulisches Signal erzeugt, das auf den Unwuchterreger in der Vibrationsplatte übertragen werden kann, um die Phasenlage der gegeneinander rotierenden Unwuchtwellen in bekannter Weise zu bestimmen bzw. zu verändern. Mit Hilfe des Umschaltbügels kann somit die Laufrichtung (vorwärts, rückwärts) der Vibrationsplatte eingestellt werden.The switchover bar belonging to a control device for the vibration plate is generally very stable and on the one hand enables the operator to guide and steer the vibration plate. On the other hand, the switching bracket is designed as a large hand lever and can be pivoted relative to the tiller head to which it is attached. By pivoting the switching bracket relative to the tiller head, a hydraulic signal is generated which can be transmitted to the imbalance exciter in the vibration plate in order to determine or change the phase position of the counter-rotating imbalance shafts in a known manner. The running direction (forwards, backwards) of the vibration plate can be adjusted with the help of the switching bracket.

Fig. 1 zeigt ein Beispiel für eine derartige bekannte Steuervorrichtung für eine Vibrationsplatte. 1 Fig. 12 shows an example of such a known control device for a vibrating plate.

Am Ende einer nicht dargestellten Deichsel ist ein Deichselkopf mit einem Steuergehäuse 1 ausgebildet, an dem ein als Bedienungselement dienender Umschaltbügel 2 verschwenkbar angebracht ist. Der Umschaltbügel 2 ist relativ zu dem Steuergehäuse 1 um eine Achse 3 verschwenkbar.At the end of a tiller, not shown, there is a tiller head with a control housing 1 on which a switching bracket serving as an operating element 2 is pivotally mounted. The switching bracket 2 can be pivoted about an axis 3 relative to the control housing 1 .

Im Inneren des Steuergehäuses 1 ist ein Geberkolben 4 angeordnet, der in einem im Inneren des Steuergehäuses 1 ausgebildeten Geberzylinder 5 axial hin und her bewegbar ist.A master piston 4 is arranged in the interior of the control housing 1 and can be moved back and forth axially in a master cylinder 5 formed in the interior of the control housing 1 .

Als Teil des Geberkolbens 4 bzw. in seiner axialen Verlängerung ist eine Kolbenstange 6 ausgebildet, die eine Zahnstange 7 trägt. Die Zahnstange 7 kämmt mit einem Ritzel 8, das auf der Achse 3 befestigt ist.A piston rod 6 which carries a toothed rack 7 is formed as part of the master piston 4 or in its axial extension. The rack 7 meshes with a pinion 8 which is fixed on the axle 3.

Dementsprechend bewirkt eine Verschwenkung des Umschaltbügels 2 eine Verdrehung des Ritzels 8 und damit eine lineare Verschiebung der Zahnstange 7, der Kolbenstange 6 und des Geberkolbens 4.Accordingly, a pivoting of the switching bracket 2 causes a rotation of the pinion 8 and thus a linear displacement of the toothed rack 7, the piston rod 6 and the master piston 4.

Stirnseitig vor dem Geberkolben 4 ist eine Zylinderkammer 9 vorgesehen, die mit einem Hydraulikfluid befüllbar ist. Die Zylinderkammer 9 steht über einen Hydraulikanschluss 10 und eine nicht dargestellte Hydraulikleitung mit einem entsprechenden Nehmerzylinder bzw. Nehmerkolben in einem ebenfalls nicht dargestellten Unwuchterreger der Vibrationsplatte in Verbindung. Durch die hydraulische Kopplung der Zylinderkammer 9 mit dem Unwuchterreger bewirkt somit eine Verstellung bzw. Verschiebung des Geberkolbens 4 eine entsprechende Verdrehung der Unwuchtwellen bzw. Unwuchtmassen in dem nicht dargestellten Unwuchterreger. Dadurch kann die Phasenlage der gegenläufig rotierenden Unwuchtwellen verstellt werden.A cylinder chamber 9 is provided on the front side in front of the master piston 4 and can be filled with a hydraulic fluid. The cylinder chamber 9 is connected via a hydraulic connection 10 and a hydraulic line, not shown, to a corresponding slave cylinder or slave piston in an imbalance exciter, also not shown, of the vibration plate. Due to the hydraulic coupling of the cylinder chamber 9 to the imbalance exciter, an adjustment or displacement of the master piston 4 thus causes a corresponding twisting of the imbalance shafts or imbalance masses in the imbalance exciter, not shown. As a result, the phase position of the counter-rotating imbalance shafts can be adjusted.

Somit kann mit Hilfe des Umschaltbügels 2 der resultierende Kraftvektor des Unwuchterregers und damit die Laufrichtung der Vibrationsplatte eingestellt werden.The resultant force vector of the imbalance exciter and thus the running direction of the vibration plate can thus be adjusted with the aid of the switching bracket 2 .

Fig. 2 zeigt die Steuervorrichtung von Fig. 1 in einer Perspektivansicht. 2 shows the control device of 1 in a perspective view.

Bei dem in Fig. 1 dargestellten Zustand ist erkennbar, dass sich der Geberkolben 4 in seiner vordersten Stellung befindet und dementsprechend die Zylinderkammer 9 nur noch ein sehr geringes Volumen aufweist. Die Zylinderkammer 9 ähnelt in diesem Zustand einer dünnen zylindrischen Scheibe.At the in 1 shown state it can be seen that the master piston 4 is in its foremost position and accordingly the cylinder chamber 9 has only a very small volume. In this state, the cylinder chamber 9 resembles a thin cylindrical disk.

Zum Unterstützen des Erreichens dieser Stellung ist eine Feder 11 vorgesehen, die den Geberkolben 4 in die in Fig. 1 gezeigte Stellung drückt bzw. eine Bewegung in diese Richtung unterstützt, um das in der Zylinderkammer 9 befindliche Hydraulikfluid über den Hydraulikanschluss 10 auszupressen. Die im Unwuchterreger rotierenden Unwuchtwellen bzw. Unwuchtmassen bewirken aufgrund ihrer Trägheit ein Rückstellmoment, das auf die Hydraulikeinrichtung im Unwuchterreger wirkt und durch den Geberkolben 4 gehalten werden muss. Mit anderen Worten bewirkt das Rückstellmoment eine Kraft auf den Geberkolben 4, die diesen aus der in Fig. 1 gezeigten Maximalstellung drückt. Diese Kraft muss durch den Geberkolben 4 gehalten werden, um die maximale Vorwärtsfahrt aufrecht zu erhalten. Damit die Haltekraft auf den Geberkolben 4 nicht ausschließlich vom Bediener über den Bedienungshebel 2 aufgebracht werden muss, wirkt die Feder 11 unterstützend.To support reaching this position, a spring 11 is provided, which pushes the master piston 4 into the in 1 position shown presses or supports a movement in this direction to the located in the cylinder chamber 9 Press out hydraulic fluid via the hydraulic connection 10. Due to their inertia, the imbalance shafts or imbalance masses rotating in the imbalance exciter cause a restoring torque that acts on the hydraulic device in the imbalance exciter and must be held by the master piston 4 . In other words, the restoring torque causes a force on the master piston 4, which forces it out of the 1 shown maximum position. This force must be held by master piston 4 to maintain maximum forward travel. The spring 11 has a supporting effect so that the holding force on the master piston 4 does not have to be applied exclusively by the operator via the operating lever 2 .

Die in Fig. 1 gezeigte Stellung entspricht somit einer maximalen Vorwärtsfahrt der Vibrationsplatte. Der Umschaltbügel 2 befindet sich in seiner vordersten Stellung (Pfeilrichtung V in Fig. 1).In the 1 position shown thus corresponds to a maximum forward travel of the vibrating plate. The switching bracket 2 is in its foremost position (arrow direction V in 1 ).

Um eine maximale Rückwärtsfahrt der Vibrationsplatte zu erreichen, kann der Umschaltbügel 2 nach hinten, in Pfeilrichtung R, um einen bestimmten Winkel, z.B. 40 Grad, verschwenkt werden. Daraufhin wird das Ritzel 8 verdreht und zieht über die Zahnstange 7 die Kolbenstange 6 und den Geberkolben 4 ebenfalls zurück in Pfeilrichtung R. Dadurch wird das Volumen in der Zylinderkammer 9 vergrößert und es wird Hydraulikfluid über den Hydraulikanschluss 10 eingelassen. Entsprechend können sich die über die kommunizierende Hydraulik verbundenen Unwuchtwellen im Unwuchterreger hinsichtlich ihrer Drehstellung und Phasenlage verdrehen, so dass schließlich eine maximale Rückwärtsfahrt der Vibrationsplatte erreicht werden kann.In order to achieve maximum reversing of the vibrating plate, the switching bracket 2 can be pivoted backwards, in the direction of arrow R, by a specific angle, e.g. 40 degrees. The pinion 8 is then rotated and also pulls the piston rod 6 and the master piston 4 back in the direction of arrow R via the toothed rack 7 . This increases the volume in the cylinder chamber 9 and hydraulic fluid is admitted via the hydraulic connection 10 . Correspondingly, the imbalance shafts in the imbalance exciter, which are connected via the communicating hydraulics, can rotate with regard to their rotational position and phase position, so that ultimately the vibration plate can move backwards as far as possible.

Wenn der Umschaltbügel 2 in der Mitte steht, also zwischen der maximalen Vorwärtsfahrt und der maximalen Rückwärtsfahrt, stellt sich die sogenannte Standrüttelung ein, in der die Vibrationsplatte auf der Stelle stehend rüttelt, um eine lokale Verdichtung zu bewirken. Zwischen den Extremstellungen des Umschaltbügels 2 sind beliebige Zwischenstellungen stufenlos möglich.If the switching bar 2 is in the middle, ie between the maximum forward drive and the maximum reverse drive, the so-called stationary vibration occurs, in which the vibrating plate vibrates standing on the spot in order to bring about local compaction. Between the extreme positions of the switching bracket 2, any intermediate positions are steplessly possible.

Um die Bedienkräfte beim Umschalten der Laufrichtung so gering wie möglich zu halten, ist die oben bereits erläuterte Feder 11 vorgesehen, die die Bewegung des Geberkolbens 4 gegen den prinzipbedingt anliegenden Hydraulikdruck in der Zylinderkammer 9 unterstützt. Die Federkraft der Feder 11 kann derart ausgelegt sein, dass sich beim Loslassen des Umschaltbügels 2 selbstständig eine Standrüttelung einstellt, also die Vibrationsplatte ihre Vorschubbewegung selbsttätig auf Stillstand fährt.In order to keep the operating forces as low as possible when switching the running direction, the spring 11 already explained above is provided, which supports the movement of the master piston 4 against the hydraulic pressure in the cylinder chamber 9 inherent to the principle. The spring force of the spring 11 can be designed in such a way that when the switching bracket 2 is released, a stationary vibration is automatically set, ie the vibrating plate automatically brings its feed movement to a standstill.

Eine derartige Steuervorrichtung ist z.B. aus der DE 40 16 822 A1 bekannt.Such a control device is, for example, from DE 40 16 822 A1 famous.

Die beschriebene Steuervorrichtung hat sich in der Praxis sehr bewährt und eignet sich insbesondere auch für ungeübte Fahrer, da sich die Maschine stets in die Richtung bewegt, in die der Bediener den Umschaltbügel hält.The control device described has proven very effective in practice and is particularly suitable for inexperienced drivers, since the machine always moves in the direction in which the operator is holding the switch bar.

Um die Maschine in voller Vorwärtsfahrt laufen zu lassen, ist es dabei erforderlich, den Umschaltbügel 2 permanent aktiv nach vorne in Pfeilrichtung V zu drücken. Für den Bediener ist es somit nicht möglich, den Umschaltbügel 2 loszulassen und die Maschine bei voller Vorwärtsfahrt seitlich am Schutzrahmen zu führen und zum Beispiel gegen einen Absatz, wie einen Bordstein, zu drücken, an dem sie direkt entlanggeführt werden soll. Für diese Arbeit werden in der Regel zwei Personen benötigt, nämlich der Bediener der Vibrationsplatte, der den Umschaltbügel nach vorne hält, und eine zweite Person, die die Vibrationsplatte seitlich führt und zur Seite drückt.In order to let the machine run at full forward speed, it is necessary to actively press the switching bar 2 forwards in the direction of the arrow V at all times. It is therefore not possible for the operator to let go of the switching bar 2 and guide the machine at full forward travel laterally on the protective frame and, for example, to press against a step, such as a curb, along which it is to be guided directly. Two people are usually required for this work, namely the operator of the vibration plate, who holds the switching bracket forward, and a second person, who guides the vibration plate sideways and pushes it to the side.

In der DE 41 29 915 A1 wird eine Steuervorrichtung beschrieben, mit einem stirnseitig verzahnten Rastbolzen, der in die Zahnflanken einer Zahnstange eingreift und damit die Bewegung der Zahnstange blockieren kann. Die Zahnstange wiederum ist mit einem Bowdenzug verbunden, der zu einer verstellbaren Pumpe eines hydraulischen Antriebes einer Vibrationswalze führt.In the DE 41 29 915 A1 describes a control device with a frontally toothed locking bolt which engages in the tooth flanks of a toothed rack and can thus block the movement of the toothed rack. The rack in turn is connected to a Bowden cable, which leads to an adjustable pump of a hydraulic drive of a vibration roller.

Aus der DE 84 02 033 U1 ist eine Steuervorrichtung für eine Vibrationswalze bekannt, an der ein einrastbarer Bedienungshebel mit einer neutralen Mittelstellung und jeweils einer Fahrstellung für Vorwärtsfahrt und Rückwärtsfahrt angeordnet ist.From the DE 84 02 033 U1 a control device for a vibratory roller is known, on which a latchable operating lever with a neutral center position and a driving position for forward and reverse travel is arranged.

Der Erfindung liegt die Aufgabe zugrunde, eine Steuervorrichtung für eine Bodenverdichtungsvorrichtung anzugeben, durch die die Bodenverdichtungsvorrichtung, insbesondere eine Vibrationsplatte, mit voller Vorwärts fahrt betrieben werden kann, und zwar auch dann, wenn der Bediener ein entsprechendes Bedienelement losgelassen hat. Dabei soll es für den Bediener möglich sein, das für ihn vorgesehene Bedienungselement jederzeit wieder zu betätigen, um die Maschine zu steuern und insbesondere anzuhalten oder in Rückwärtsrichtung zu fahren. Zudem soll die Steuervorrichtung wenigstens das präzise Einstellen einer Mittelstellung für eine Standrüttelung der Bodenverdichtungsvorrichtung ermöglichen.The invention is based on the object of specifying a control device for a soil compaction device, through which the soil compaction device, in particular a vibrating plate, can be operated at full forward travel, even if the operator has released a corresponding operating element. It should be possible for the operator to actuate the control element provided for him at any time in order to control the machine and, in particular, to stop it or drive it in reverse. In addition, the control device should at least enable the precise setting of a center position for stationary vibration of the soil compacting device.

Die Aufgabe wird erfindungsgemäß durch eine Steuervorrichtung mit den Merkmalen von Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen sind in den abhängigen Ansprüchen angegeben. Insbesondere wird eine als Bodenverdichtungsvorrichtung dienende Vibrationsplatte angegeben, die mit der Steuervorrichtung ausgestattet ist.The object is achieved according to the invention by a control device with the features of claim 1. Advantageous configurations are specified in the dependent claims. In particular, a vibrating plate serving as a soil compacting device equipped with the control device is provided.

Es wird eine Steuervorrichtung für eine Bodenverdichtungsvorrichtung angegeben, mit einem bewegbaren Bedienungselement zum Vorgeben einer Laufrichtung der Bodenverdichtungsvorrichtung durch einen Bediener; mit einer hydraulischen Gebereinrichtung, mit einem Geberzylinder, in dem ein Geberkolben linear hin und her bewegbar ist, zum Erzeugen eines hydraulischen Signals; mit einem Hydraulikanschluss zum Ankoppeln von Hydraulikkomponenten der Bodenverdichtungsvorrichtung und zum Übertragen des hydraulischen Signals von der Gebereinrichtung; und mit einer Übertragungseinrichtung zum Übertragen der Bewegung des Bedienungselements in eine Linearbewegung des Geberkolbens; wobei das Bedienungselement zwischen einer ersten Stellung und einer zweiten Stellung bewegbar ist, wobei die erste Stellung einer maximalen Vorwärtsfahrt der Bodenverdichtungsvorrichtung entspricht und wobei die zweite Stellung einer maximalen Rückwärtsfahrt der Bodenverdichtungsvorrichtung entspricht; und wobei eine Rasteinrichtung vorgesehen ist, zum lösbaren Halten des Bedienungselements in einer vorbestimmten Stellung. Bei der vorbestimmten Stellung kann es sich um die erste Stellung, also die Stellung für maximale Vorwärtsfahrt handeln. Es kann sich aber auch um eine andere definierte Stellung handeln, z.B. um eine Stellung, die zwischen der ersten Stellung und der zweiten Stellung, also den beiden Extremstellungen liegt.A control device for a soil compacting device is specified, with a movable operating element for specifying a running direction of the soil compacting device by an operator; with a hydraulic master device, with a master cylinder in which a master piston can be moved back and forth linearly, for generating a hydraulic signal; with a hydraulic connection for coupling hydraulic components of the soil compacting device and for transmitting the hydraulic signal from the transmitter device; and with a transmission device for transmitting the movement of the operating element into a linear movement of the master piston; wherein the operating member between a first position and a second position is movable, wherein the first position corresponds to a maximum forward travel of the soil compacting device and wherein the second position corresponds to a maximum reverse travel of the soil compacting device; and wherein a latch means is provided for releasably holding the operating member in a predetermined position. The predetermined position can be the first position, ie the position for maximum forward travel. However, it can also be another defined position, for example a position that lies between the first position and the second position, ie the two extreme positions.

Das Bedienungselement kann zum Beispiel als Umschaltbügel, wie insbesondere als Griffbügel, Handhebel, Schiebeelement oder Führungsbügel ausgebildet sein. Der Begriff eines Umschaltbügels ist insoweit breit zu verstehen. Das Bedienungselement kann dabei relativ zu einer Halterung (z.B. einem Deichselkopf) bewegbar ist, um die beiden gewünschten Stellungen des Bedienungselements zu erreichen. Dabei kann das Bedienungselement eine Linearbewegung oder insbesondere eine Schwenkbewegung vollziehen.The operating element can be designed, for example, as a switching bar, in particular as a handle bar, hand lever, sliding element or guide bar. In this respect, the concept of a switchover bracket is to be understood broadly. The operating element can be moved relative to a holder (e.g. a tiller head) in order to achieve the two desired positions of the operating element. The operating element can perform a linear movement or, in particular, a pivoting movement.

Mit Hilfe der Übertragungseinrichtung wird die Bewegung des Bedienungselements auf den Geberkolben übertragen. Der Geberkolben vollzieht somit eine Bewegung entsprechend der Bewegung des Bedienelements.With the help of the transmission device, the movement of the operating element is transmitted to the master piston. The master piston thus performs a movement corresponding to the movement of the operating element.

Der Geberkolben als Teil der hydraulischen Gebereinrichtung erzeugt im Zusammenwirken mit der Hydraulik bzw. einem Hydraulikfluid das hydraulische Signal, das über den Hydraulikanschluss und gegebenenfalls weitere Komponenten (Hydraulikleitung) an weitere Hydraulikkomponenten der Bodenverdichtungsvorrichtung übertragen werden kann. Dabei handelt es sich insbesondere um einen hydraulisch verstellbaren Unwuchterreger, der auf diese Weise mit Hilfe des Bedienungselements verstellt werden kann.The master piston as part of the hydraulic master device generates the hydraulic signal in cooperation with the hydraulics or a hydraulic fluid, which can be transmitted to further hydraulic components of the soil compacting device via the hydraulic connection and optionally further components (hydraulic line). This is in particular a hydraulically adjustable imbalance exciter that can be adjusted in this way with the help of the operating element.

Bei dieser Definition ist die Steuervorrichtung von der eigentlichen Bodenverdichtungsvorrichtung, zum Beispiel einer Vibrationsplatte separierbar und weist entsprechende mechanische (z.B. Befestigung über einen Deichselkopf an einer Deichsel der Vibrationsplatte) und hydraulische Kopplungsmöglichkeiten (Hydraulikanschluss) auf.With this definition, the control device can be separated from the actual soil compaction device, e.g. a vibratory plate, and has appropriate mechanical (e.g. attachment via a tiller head to a tiller of the vibratory plate) and hydraulic coupling options (hydraulic connection).

Die Rasteinrichtung ist in der Lage, das Bedienungselement in der vorbestimmten Stellung zu halten. Die vorbestimmte Stellung kann in geeigneter Weise gewählt werden, um z.B. eine Vorwärtsfahrt mit einer bestimmten Geschwindigkeit zu bewirken. So kann z.B. auch eine Vorwärtsfahrt mit geringer Geschwindigkeit, unterhalb der maximalen Vorwärtsfahrt, erreicht werden.The locking device is able to hold the operating element in the predetermined position. The predetermined position can be selected in a suitable manner, for example to effect forward travel at a specific speed. For example, forward travel at a low speed, below the maximum forward travel, can also be achieved.

Bei einer Variante der Rasteinrichtung ist es auch möglich, die vorbestimmte Stellung zu variieren, um das Bedienungselement in unterschiedlichen Stellungen halten und damit fixieren zu können. So hat der Bediener die Möglichkeit, durch Einstellen der Rasteinrichtung jeweils eine bestimmte, für den aktuellen Einsatzzweck geeignete Geschwindigkeit in Form einer Stellung des Bedienungselements vorzugeben und das Bedienungselement auch in dieser Stellung zu halten.In a variant of the latching device, it is also possible to vary the predetermined position in order to be able to hold the operating element in different positions and thus fix it. Thus, the operator has the possibility, by setting the latching device, to specify a specific speed that is suitable for the current application in the form of a position of the operating element and also to hold the operating element in this position.

Bei der vorbestimmten Stellung kann es sich um die erste Stellung handeln, also um die Stellung für die maximale Vorwärtsfahrt. Die Rasteinrichtung ist dann in der Lage, das Bedienungselement in der ersten Stellung zu halten. Dadurch kann eine maximale Vorwärtsfahrt auch dann beibehalten werden, wenn der Bediener das Bedienungselement nicht mehr in dieser Stellung hält, sondern loslässt.The predetermined position may be the first position, that is, the position for maximum forward travel. The locking device is then able to hold the operating element in the first position. As a result, maximum forward travel can be maintained even if the operator no longer holds the operating element in this position but lets go.

Dabei kann das Bedienungselement derart lösbar durch die Rasteinrichtung gehalten sein, dass das Bedienungselement von dem Bediener mithilfe seiner Handkraft durch Überwinden der Rasteinrichtung aus der vorbestimmten Stellung herausbewegbar ist.The operating element can be releasably held by the latching device in such a way that the operating element can be moved out of the predetermined position by the operator using his manual force by overcoming the latching device.

Dabei soll das Bedienungselement somit nur "lösbar" in der vorbestimmten, z.B. ersten Stellung gehalten werden, damit es leicht durch Einwirkung des Bedieners an dem Bedienungselement auch wieder in eine andere Stellung gebracht werden kann. Der Bediener muss jederzeit die Möglichkeit haben, durch Betätigung des Bedienungselements dieses aus der vorbestimmten bzw. ersten Stellung zu bewegen, also zu lösen, um z.B. die maximale Vorwärtsfahrt zu stoppen. Die Lösbarkeit des Bedienungselements aus der vorbestimmten bzw. ersten Stellung bedeutet somit, dass der Bediener mit seiner normalen Handkraft den Haltezustand auflösen kann. Selbstverständlich darf der Bediener dabei nicht erst irgendwelche Verbindungsmittel zerstören müssen (Durchschneiden eines Haltedrahts, etc.).The operating element should therefore only be held "releasably" in the predetermined position, e.g. the first position, so that it can easily be brought back into another position by the operator acting on the operating element. The operator must always be able to move the control element out of the predetermined or first position, i.e. to release it, in order to stop maximum forward travel, for example. The detachability of the operating element from the predetermined or first position thus means that the operator can release the holding state with his normal manual strength. Of course, the operator must not first have to destroy any connecting means (cutting through a retaining wire, etc.).

Mit Hilfe der Rasteinrichtung wird dem Bediener diese Möglichkeit eröffnet.This possibility is opened up to the operator with the aid of the latching device.

Die Rasteinrichtung kann dabei in zwei Betriebszustände schaltbar sein, nämlich in einen ersten Betriebszustand, in dem durch die Rasteinrichtung das lösbare Halten des Bedienungselements in der vorbestimmten bzw. ersten Stellung bewirkbar ist, und in einen zweiten Betriebszustand, in dem die Rasteinrichtung wirkungslos ist. Somit kann die Rasteinrichtung je nach Wunsch aktiviert oder deaktiviert werden. Wenn die Rasteinrichtung aktiviert ist, kann sie die gewünschte Funktion des lösbaren Haltens des Bedienungselements in der ersten Stellung erfüllen.The latching device can be switched into two operating states, namely a first operating state in which the latching device can be used to detachably hold the operating element in the predetermined or first position, and a second operating state in which the latching device is ineffective. Thus, the locking device can be activated or as desired be deactivated. When the latch is activated, it can perform the desired function of releasably holding the control in the first position.

Wenn hingegen die Rasteinrichtung deaktiviert ist, bleibt sie wirkungslos und hält das Bedienungselement auch dann nicht, wenn es in der ersten Stellung steht.If, on the other hand, the locking device is deactivated, it remains ineffective and does not hold the operating element even when it is in the first position.

Somit kann sichergestellt werden, dass das Halten des Bedienungselements in der ersten Stellung, also in der Stellung für maximale Vorwärtsfahrt, nur dann bewirkt wird, wenn der Bediener dies durch Aktivieren der Rasteinrichtung auch wünscht. Im Normalbetrieb kann die Funktion der Rasteinrichtung deaktiviert werden.It can thus be ensured that the operating element is held in the first position, ie in the position for maximum forward travel, only if the operator also wishes this by activating the latching device. In normal operation, the function of the latching device can be deactivated.

Das Bedienungselement kann derart bewegbar sein, dass es um eine Achse verschwenkbar ist, wobei die Übertragungseinrichtung ausgebildet sein kann zur Übertragung der Schwenkbewegung des Bedienungselements in eine Linearbewegung des Geberkolbens. Bei dieser Variante wird berücksichtigt, dass es sich bei dem Bedienungselement insbesondere um einen verschwenkbaren Umschaltbügel handeln kann, dessen Bewegung dann in geeigneter Weise in die Linearbewegung des Geberkolbens übertragen wird.The operating element can be moved in such a way that it can be pivoted about an axis, and the transmission device can be designed to transfer the pivoting movement of the operating element into a linear movement of the master piston. In this variant, it is taken into account that the operating element can in particular be a pivotable switching bracket, the movement of which is then transferred in a suitable manner to the linear movement of the master piston.

Es kann ein Steuergehäuse vorgesehen sein, an dem das Bedienungselement bewegbar gehalten ist, wobei in dem Steuergehäuse der Geberzylinder und der Geberkolben angeordnet sein können. Das Steuergehäuse kann insbesondere in dem Deichselkopf ausgebildet sein, der seinerseits am Ende einer Deichsel befestigbar ist, die Teil der Bodenverdichtungsvorrichtung ist.A control housing can be provided on which the operating element is movably held, it being possible for the master cylinder and the master piston to be arranged in the control housing. The control housing can be formed in particular in the tiller head, which in turn can be fastened to the end of a tiller which is part of the soil compacting device.

Die Übertragungseinrichtung kann eine mit dem Bedienungselement gekoppelte Ritzelwelle sowie eine mit dem Geberkolben gekoppelte Zahnstange aufweisen, wobei die Ritzelwelle mit der Zahnstange kämmt, derart, dass eine Verdrehung der Ritzelwelle eine lineare Verschiebung der Zahnstange bewirkt.The transmission device can have a pinion shaft coupled to the operating element and a toothed rack coupled to the master piston, the pinion shaft meshing with the toothed rack such that rotation of the pinion shaft causes a linear displacement of the toothed rack.

Dabei kann die Zahnstange mit einer einen Teil des Geberkolbens bildenden Kolbenstange gekoppelt sein bzw. in der Kolbenstange als Teil des Geberkolbens ausgebildet sein. Die Verschiebung der Zahnstange bewirkt somit auch eine Verschiebung des Geberkolbens.In this case, the toothed rack can be coupled to a piston rod forming part of the master piston or can be formed in the piston rod as part of the master piston. The shifting of the toothed rack thus also causes a shifting of the master piston.

Die Rasteinrichtung kann ein Druckstück mit einem federnd gelagerten Rastelement aufweisen, wobei die Rasteinrichtung weiterhin eine Ausnehmung aufweisen kann, in die das Rastelement einführbar ist, und wobei die Ausnehmung an der Übertragungseinrichtung oder an dem Geberkolben ausgebildet sein kann. Das Druckstück kann in dem Steuergehäuse gelagert sein. Das Rastelement kann als Raststift ausgebildet sein und in dem Druckstück gegen eine Feder beweglich gehalten sein.The latching device can have a pressure piece with a resiliently mounted latching element, the latching device also having a recess can, in which the locking element can be inserted, and wherein the recess can be formed on the transmission device or on the master piston. The pressure piece can be mounted in the control housing. The locking element can be designed as a locking pin and can be held in the pressure piece so that it can move against a spring.

Das Druckstück kann in dem Steuergehäuse gelagert sein, wobei die Ausnehmung an dem Geberkolben oder in der Ritzelwelle ausgebildet sein kann und wobei das Rastelement in die Ausnehmung eingeführt ist, wenn das Bedienungselement in der vorbestimmten, also z.B. der ersten Stellung steht. Es ist somit möglich, dass die Verrastung zum Beispiel über den Geberkolben bzw. die Kolbenstange erfolgen kann. Sie kann aber auch über die Ritzelwelle oder über den Umschaltbügel erfolgen, wenn dort entsprechende Rastelemente und eine geeignete Ausnehmung ausgebildet sind.The pressure piece can be mounted in the control housing, the recess being formed on the master piston or in the pinion shaft and the latching element being inserted into the recess when the operating element is in the predetermined position, e.g. the first position. It is thus possible for the latching to take place, for example, via the master piston or the piston rod. However, it can also take place via the pinion shaft or via the switching bracket if corresponding locking elements and a suitable recess are formed there.

Somit kann bei einer Variante die Kolbenstange verrastet werden. Bei einer anderen Variante kann die Ritzelwelle oder der Umschaltbügel verrastet werden. Dazu weist die Mantelfläche der Ritzelwelle eine geeignete Rastgeometrie (Ausnehmung), zum Beispiel eine Kugelkalotte auf. Eine entsprechende Wirkung kann auch am Umschaltbügel umgesetzt werden. Dazu ist es möglich, das Druckstück auch außenliegend, also außerhalb des Deichselkopfs bzw. des Steuergehäuses zu befestigen.Thus, in one variant, the piston rod can be locked. In another variant, the pinion shaft or the switching bracket can be locked. For this purpose, the outer surface of the pinion shaft has a suitable locking geometry (recess), for example a spherical cap. A corresponding effect can also be implemented on the switching bracket. It is also possible to fasten the pressure piece on the outside, i.e. outside of the tiller head or the control housing.

Der Geberkolben kann eine Kolbenstange aufweisen, in oder an der die Zahnstange ausgebildet ist, wobei die Ausnehmung in der Kolbenstange ausgebildet sein kann und wobei in einer Längsrichtung der Kolbenstange, versetzt zu der Ausnehmung, eine weitere, sich längserstreckende Ausnehmung als Freigang ausgebildet sein kann. Der Freigang kann vorgesehen sein, um eine Reibung an dem Rastelement bzw. dem Raststift in dem Bereich zwischen der Standrüttelung bzw. einer leichten Vorwärtsfahrt bis zu einer vollen Rückwärtsfahrt auszuschließen. Es soll also möglichst keine Reibung des Rastelements an der Kolbenstange in den Bereichen außerhalb der vollen Vorwärtsfahrt wirken, um eine gute Beweglichkeit der Kolbenstange und des Geberkolbens zu gewährleisten.The master piston can have a piston rod, in or on which the toothed rack is formed, wherein the recess can be formed in the piston rod and wherein in a longitudinal direction of the piston rod, offset to the recess, a further longitudinally extending recess can be formed as a clearance. The clearance can be provided in order to rule out friction on the latching element or the latching pin in the area between stationary shaking or slight forward travel and full reverse travel. There should therefore be as little friction as possible between the latching element and the piston rod in the areas outside of full forward travel, in order to ensure good mobility of the piston rod and the master piston.

Das Druckstück kann in dem Steuergehäuse zwischen zwei Stellungen bewegbar gelagert sein, wobei die erste Stellung des Druckstücks derart definiert ist, dass das Rastelement des Druckstücks in die Ausnehmung einführbar ist, während die zweite Stellung des Druckstücks derart definiert sein kann, dass das Rastelement nicht in die Ausnehmung einführbar ist. Zudem kann eine Umschalteinrichtung vorgesehen sein, zum definierten Bewegen und Halten des Druckstücks in der ersten Stellung oder in der zweiten Stellung. Die erste Stellung bedeutet dabei, dass die selbsthaltende Vorwärtsfahrt eingeschaltet, also aktiviert sein kann. In diesem Fall kann die Rasteinrichtung die vorgesehene Funktion erfüllen. In der zweiten Stellung hingegen ist die Rasteinrichtung deaktiviert, also ausgeschaltet und wirkungslos. Der Aktivierungs- bzw. Deaktivierungszustand der Rasteinrichtung kann somit durch die beiden Stellungen des Druckstücks verwirklicht werden. Dabei kann das Druckstück zwischen den beiden Stellungen insbesondere verschiebbar gelagert sein.The pressure piece can be movably mounted in the control housing between two positions, with the first position of the pressure piece being defined in such a way that the locking element of the pressure piece can be inserted into the recess, while the second position of the pressure piece can be defined in such a way that the locking element is not in the recess can be inserted. In addition, a switching device be provided for defined movement and holding of the pressure piece in the first position or in the second position. The first position means that the self-sustaining forward drive can be switched on, ie activated. In this case, the locking device can fulfill the intended function. In the second position, on the other hand, the latching device is deactivated, that is to say switched off and ineffective. The activation or deactivation state of the locking device can thus be realized by the two positions of the pressure piece. In this case, the pressure piece can be mounted in particular so that it can be displaced between the two positions.

Die Umschalteinrichtung zum Verändern der Stellungen des Druckstücks kann einen schwenkbaren Hebel mit einer exzentrischen Geometrie aufweisen, wobei der Hebel entsprechend den beiden Stellungen des Druckstücks in zwei definierte Stellungen verschwenkbar sein kann. Mit Hilfe des Hebels ist es somit möglich, die Stellung des Druckstücks zu verändern und die beiden definierten Stellungen (erste Stellung und zweite Stellung) zu bestimmen, um auf diese Weise die Rasteinrichtung zu aktivieren oder zu deaktivieren.The switching device for changing the positions of the pressure piece can have a pivotable lever with an eccentric geometry, it being possible for the lever to be pivotable into two defined positions corresponding to the two positions of the pressure piece. With the help of the lever it is thus possible to change the position of the pressure piece and to determine the two defined positions (first position and second position) in order in this way to activate or deactivate the latching device.

Das Bedienungselement kann in eine zwischen der ersten Stellung und der zweiten Stellung vorgesehene dritte Stellung verschwenkbar sein, die einem Stillstand der Bodenverdichtungsvorrichtung entspricht. Stillstand bedeutet in diesem Fall einen Zustand, in dem die Bodenverdichtungsvorrichtung zwar Vibrationen zur Bodenverdichtung erzeugt, jedoch keinen Vorschub. Die Bodenverdichtungsvorrichtung bewegt sich somit nicht von der Stelle, sondern bewirkt eine Standrüttelung.The operating element can be pivoted into a third position provided between the first position and the second position, which corresponds to a standstill of the soil compacting device. In this case, standstill means a state in which the soil compacting device generates vibrations for soil compaction, but no advance. The soil compaction device thus does not move from the spot, but causes a static vibration.

Die Bodenverdichtungsvorrichtung kann vorteilhafterweise eine Vibrationsplatte sein.The soil compaction device can advantageously be a vibratory plate.

Dementsprechend wird auch eine Vibrationsplatte angegeben, die mit einer Steuervorrichtung der vorbeschriebenen Art ausgestattet sein kann.Accordingly, a vibrating plate is also specified, which can be equipped with a control device of the type described above.

Diese und weitere Vorteile und Merkmale der Erfindung werden nachfolgend anhand von Beispielen unter Zuhilfenahme der begleitenden Figuren näher erläutert. Es zeigen:

Fig. 1
eine Steuervorrichtung gemäß dem Stand der Technik in Schnittdarstellung;
Fig. 2
die Steuervorrichtung von Fig. 1 in Perspektivansicht;
Fig. 3
eine erfindungsgemäße Steuervorrichtung mit aktivierter Rasteinrichtung; und
Fig. 4
die Steuervorrichtung von Fig. 3 mit deaktivierter Rastvorrichtung.
These and other advantages and features of the invention are explained in more detail below using examples with the aid of the accompanying figures. Show it:
1
a control device according to the prior art in a sectional view;
2
the control device of 1 in perspective view;
3
a control device according to the invention with an activated latching device; and
4
the control device of 3 with deactivated locking device.

Die Fig. 3 und 4 zeigen eine Steuervorrichtung, die in weiten Teilen analog zu der aus dem Stand der Technik bekannten und oben anhand der Fig. 1 und 2 beschriebenen Steuervorrichtung aufgebaut ist. Zur Vermeidung von Wiederholungen werden daher gleiche Bauelemente auch mit gleichen Bezugszeichen gekennzeichnet. Zudem wird bezüglich der generellen Funktionsweise der Steuervorrichtung auf die obige Beschreibung Bezug genommen.the 3 and 4 show a control device that is largely analogous to that known from the prior art and above with reference to FIG Figures 1 and 2 described control device is constructed. To avoid repetition, the same components are therefore also identified with the same reference symbols. In addition, reference is made to the above description with regard to the general functioning of the control device.

So weist die Steuervorrichtung den relativ zu dem Steuergehäuse 1 verschwenkbaren Umschaltbügel 2 auf. Bei einem Verschwenken des Umschaltbügels 2 wird das Ritzel 8 um die Achse 3 verdreht, wodurch die mit dem Ritzel 8 kämmende Zahnstange 7 linear verschoben wird. Die Zahnstange 7 ist zusammen mit der Kolbenstange 6 und dem Geberkolben 4 einstückig ausgebildet, so dass eine gemeinsame Verschiebung des Geberkolbens 4 bewirkt wird. Dementsprechend kann ein hydraulisches Signal über den Hydraulikanschluss 10 an die nicht gezeigte Bodenverdichtungsvorrichtung, insbesondere an den Unwuchterreger in einer Vibrationsplatte übertragen werden.Thus, the control device has the switching bracket 2 that can be pivoted relative to the control housing 1 . When the switching bracket 2 is pivoted, the pinion 8 is rotated about the axis 3, as a result of which the toothed rack 7 meshing with the pinion 8 is linearly displaced. The toothed rack 7 is formed in one piece together with the piston rod 6 and the master piston 4, so that a common displacement of the master piston 4 is effected. Accordingly, a hydraulic signal can be transmitted via the hydraulic connection 10 to the soil compacting device (not shown), in particular to the imbalance exciter in a vibrating plate.

Der Umschaltbügel 2 muss nicht zwingend als bügelförmiges Bedienelement gestaltet sein, sondern kann auch eine andere geeignete Gestaltung aufweisen, die eine Bedienung der Maschine erlaubt.The switching bar 2 does not necessarily have to be designed as a bar-shaped operating element, but can also have another suitable design that allows the machine to be operated.

Zusätzlich zu der insoweit aus dem Stand der Technik bekannten Steuervorrichtung ist eine Rasteinrichtung 20 vorgesehen. Die Rasteinrichtung 20 weist ein Druckstück 21 auf, in dessen Innerem ein als Rastelement dienender Raststift 22 gegen die Wirkung einer Feder 23 verschiebbar ist. Der Raststift 22 tritt an einem Ende des Druckstücks 21 (in Fig. 3 das obere Ende) aus. Das stirnseitige Ende des Raststifts 22 ist dabei halbkugel- bzw. kuppenförmig ausgebildet und dringt in eine Ausnehmung 24 in der Kolbenstange 6 ein. Die Ausnehmung 24 dient somit als Rastkerbe, in die der Raststift 22 des Druckstücks 21 eingreifen kann.In addition to the control device known from the prior art, a latching device 20 is provided. The latching device 20 has a pressure piece 21 inside which a latching pin 22 serving as a latching element can be displaced against the action of a spring 23 . The locking pin 22 enters at one end of the pressure piece 21 (in 3 the top end). The front end of the locking pin 22 is hemispherical or dome-shaped and penetrates into a recess 24 in the piston rod 6 . The recess 24 thus serves as a detent notch into which the detent pin 22 of the pressure piece 21 can engage.

Bei einer Bewegung der Kolbenstange 6 in axialer Richtung verschiebt sich die Ausnehmung 24 relativ zu dem kuppenförmigen Ende des Raststifts 22, so dass dieser in das Innere des Drückstücks 21 gegen die Wirkung der Feder 23 eingedrückt wird.When the piston rod 6 moves in the axial direction, the recess 24 moves relative to the dome-shaped end of the locking pin 22 so that it is pressed into the interior of the pressure piece 21 against the action of the spring 23 .

In Fig. 3 ist ein Zustand dargestellt, in dem der Umschaltbügel 2 und damit der Geberkolben 4 in einer Stellung für maximale Vorwärtsfahrt stehen. In diesem Zustand steht der Raststift 22 auf Höhe der Ausnehmung 24, so dass die Kuppe des Raststifts 22 in die Ausnehmung 24 eindringen kann.In 3 a state is shown in which the switching bracket 2 and thus the master piston 4 are in a position for maximum forward travel. In this state, the locking pin 22 is level with the recess 24 so that the tip of the locking pin 22 can penetrate into the recess 24 .

Je nach Positionierung des Raststifts 22 und der Ausnehmung 24 ist es auch möglich, den Umschaltbügel 2 in einer anderen Stellung als in der in Fig. 3 gezeigten Stellung für maximale Vorwärtsfahrt zu verrasten. Z.B. kann die Rasteinrichtung 20 mit der Ausnehmung 24 derart positioniert sein, dass eine Verrastung des Umschaltbügels 2 in einer Stellung erfolgt, die einer reduzierten, also verlangsamten Vorwärtsfahrt entspricht. Damit kann Sicherheitserwägungen Rechnungen getragen werden, damit sich die Vibrationsplatte nicht ohne Kontrolle durch den Bediener mit maximaler Vorwärtsfahrt, sondern eben nur mit reduzierter Vorwärtsfahrt fortbewegen kann.Depending on the positioning of the locking pin 22 and the recess 24, it is also possible to set the switching bracket 2 in a position other than that in 3 shown position for maximum forward travel. For example, the latching device 20 with the recess 24 can be positioned in such a way that the switching bracket 2 latches in a position that corresponds to reduced, ie slowed, forward travel. Safety considerations can thus be taken into account, so that the vibrating plate cannot move forward without being checked by the operator at maximum forward speed, but only at reduced forward speed.

Der Raststift 22 des Druckstücks 21 ist federvorgespannt, wobei die Federkraft groß genug ist, um den Geberkolben 4, der eine systembedingte Rückstellkraft erfährt, vorne, also in der in Fig. 3 gezeigten vollen Vorwärtsfahrt, zu halten. Der Umschaltbügel kann dann dabei vom Bediener losgelassen werden und bewegt sich dennoch nicht selbsttätig in die Neutralstellung für die Standrüttelung.The locking pin 22 of the pressure piece 21 is spring-loaded, the spring force being large enough to move the master piston 4, which experiences a system-related restoring force, at the front, i.e. in the in 3 shown full forward travel. The switching bar can then be released by the operator and still does not move automatically into the neutral position for stationary vibration.

Der Raststift 22 liegt bei eingeschalteter selbsthaltender Vorwärtsfahrt (Aktivierung der Rasteinrichtung) lediglich an der linken Flanke der Ausnehmung 24 an und ist dabei bereits leicht in das Druckstück 21 eingedrückt, d.h., die Oberseite des Bunds des Raststifts 22 ist frei. Somit ist sichergestellt, dass der Geberkolben 4 stets voll und spielfrei nach vorne (in Richtung V) gedrückt wird.When self-retaining forward travel is switched on (activation of the locking device), the locking pin 22 only rests against the left flank of the recess 24 and is already slightly pressed into the pressure piece 21, i.e. the top of the collar of the locking pin 22 is free. This ensures that the master piston 4 is always pushed forward (in the direction of V) fully and without play.

In einem nicht dargestellten anderen Zustand, in dem der Umschaltbügel 2 verschwenkt ist, zum Beispiel in eine Stellung für maximale Rückwärtsfahrt, ändert sich auch die Stellung des Geberkolbens 4 zusammen mit der Kolbenstange 6 und der Zahnstange 7. Dementsprechend ist die Ausnehmung 24 relativ zu der Kuppe des Raststifts 22 verschoben, so dass der Raststift 22 nicht in der Ausnehmung 24 sitzt. Dadurch ist der Geberkolben 4 in Linearrichtung frei beweglich. Es findet keine Verrastung des Geberkolbens 4 oder des Umschaltbügels 2 statt.In a different state, not shown, in which the switching bracket 2 is pivoted, for example in a position for maximum reversing, the position of the master piston 4 changes together with the piston rod 6 and the rack 7. Accordingly, the recess 24 is relative to the Tip of the locking pin 22 shifted so that the locking pin 22 is not seated in the recess 24. As a result, the master piston 4 can move freely in the linear direction. There is no latching of the master piston 4 or the switching bracket 2.

Um die freie Beweglichkeit in diesem Zustand noch zu erhöhen, ist neben der Ausnehmung 24 ein Freigang 25 in der Kolbenstange 6 ausgebildet. Hier kann die Kuppe des Raststifts 22 eindringen, ohne eine Rastwirkung zu erzielen. Auch kann der Freigang 25 derart tief ausgebildet sein, dass der Raststift 22 die Kolbenstange 6 nicht berührt und auch keine Reibwirkung zwischen den beiden Komponenten erzeugt wird.In order to further increase the free movement in this state, a clearance 25 is formed in the piston rod 6 next to the recess 24 . The tip of the locking pin 22 can penetrate here without achieving a locking effect. The clearance 25 can also be formed so deep that the locking pin 22 does not touch the piston rod 6 and no frictional effect is generated between the two components.

Das komplette Druckstück 21 einschließlich dem Raststift 22 ist in dem Steuergehäuse 1 in Axialrichtung beweglich gelagert. Wie ein Vergleich der Fig. 3 und 4 zeigt, kann somit das Druckstück 21 zwischen zwei Stellungen bewegt und in den jeweiligen Stellungen arretiert werden. In einer ersten Stellung (Fig. 3) ist es möglich, dass die Kuppe des Raststifts 22 in die Ausnehmung 24 der Kolbenstange 6 eindringen kann, wie oben erläutert.The complete pressure piece 21 including the locking pin 22 is movably mounted in the control housing 1 in the axial direction. Like comparing the 3 and 4 shows, the pressure piece 21 can thus be moved between two positions and locked in the respective positions. In a first position ( 3 ) it is possible that the tip of the locking pin 22 can penetrate into the recess 24 of the piston rod 6, as explained above.

Im Gegensatz dazu ist bei der in Fig. 4 gezeigten zweiten Stellung das Druckstück 21 in Axialrichtung etwas nach unten herausgerückt bzw. etwas von der Kolbenstange 6 entfernt. Dadurch reicht die Länge des Raststifts 22 nicht mehr aus, um in die Ausnehmung 24 einzudringen. Die Rasteinrichtung 20 mit dem Druckstück 21 und dem Raststift 22 ist in diesem Zustand also wirkungslos und somit deaktiviert.In contrast, with the in 4 The second position shown, the pressure piece 21 moved out in the axial direction slightly downwards or slightly away from the piston rod 6. As a result, the length of the locking pin 22 is no longer sufficient to penetrate into the recess 24 . The locking device 20 with the pressure piece 21 and the locking pin 22 is therefore ineffective in this state and thus deactivated.

Zum Umschalten zwischen den beiden Stellungen des Druckstücks 21 und damit zum Aktivieren bzw. Deaktivieren der Rasteinrichtung 20 ist ein Umschalthebel 26 vorgesehen, der eine exzentrische Außenfläche 27 aufweist und um eine Drehachse 28 verschwenkbar ist, wie auch in den Fig. 3 und 4 gezeigt.To switch between the two positions of the pressure piece 21 and thus to activate or deactivate the locking device 20, a switching lever 26 is provided which has an eccentric outer surface 27 and can be pivoted about an axis of rotation 28, as also in FIGS 3 and 4 shown.

In der in Fig. 3 gezeigten Stellung ist der Abstand zwischen der das Druckstück 21 kontaktierenden exzentrischen Außenfläche 27 zu der Drehachse 28 des Umschalthebels 26 größer als bei der in Fig. 4 gezeigten Stellung. Dementsprechend wird das Druckstück 21 bei der in Fig. 3 gezeigten Stellung in Richtung der Ausnehmung 24 gedrückt.in the in 3 shown position, the distance between the eccentric outer surface 27 contacting the pressure piece 21 and the axis of rotation 28 of the switching lever 26 is greater than in the case of FIG 4 shown position. Accordingly, the pressure piece 21 in the in 3 pressed in the direction of the recess 24 shown position.

Im normalen Arbeitsbetrieb der Bodenverdichtungsvorrichtung wird der Bediener in der Regel die maximale Vorwärtsfahrt einstellen, um ein schnelles Arbeitsergebnis zu erzielen. Dazu kann die beschriebene Verrastung des Umschaltbügels 2 hilfreich sein, weil sie es dem Bediener ermöglicht, den Umschaltbügel 2 loszulassen und dennoch die maximale Vorwärtsfahrt beizubehalten.In normal working operation of the soil compacting device, the operator will usually set the maximum forward drive in order to achieve a quick work result. For this purpose, the described latching of the switching bracket 2 can be helpful because it allows the operator to let go of the switching bracket 2 and still maintain maximum forward travel.

Möchte der Bediener die Maschine anhalten oder in Rückwärtsfahrt bringen, kann der Rast- bzw. Haltemechanismus übersteuert werden. Dazu zieht der Bediener den Umschaltbügel 2 wie gewohnt, jedoch mit etwas erhöhtem Kraftaufwand zurück. Dabei wird der Raststift 22 gegen die Federkraft in das Druckstück 21 gedrückt, bis die Begrenzung der Ausnehmung 24 vollständig überwunden ist. Anschließend kann der Raststift 22 wieder ausrücken. Der ausgerückte Raststift 22 liegt nun mit seinem Bund innerhalb des Druckstücks 21 und bewegt sich in dem Freigang 25, d.h. berührungsfrei zur Kolbenstange 6. Es wird somit keine zusätzliche Reibung zwischen der Kolbenstange 6 und dem Raststift 22 erzeugt, was es der Vibrationsplatte erlaubt, auch bei eingeschalteter selbsthaltender Vorwärtsfahrt (aktivierte Rasteinrichtung) selbsttätig von Rückwärtsfahrt oder gegebenenfalls von leichter Vorwärtsfahrt in Standrüttelung zu gehen.If the operator wants to stop the machine or reverse it, the locking or holding mechanism can be overridden. To do this, the operator pulls back the switch bar 2 as usual, but with a little more effort. Here, the locking pin 22 is pressed against the spring force in the pressure piece 21 until the limitation of the recess 24 is completely overcome. Then the locking pin 22 can disengage again. The disengaged locking pin 22 now lies with its collar within the pressure piece 21 and moves in the clearance 25, i.e. without contact with the piston rod 6. No additional friction is thus generated between the piston rod 6 and the locking pin 22, which also allows the vibration plate to to go automatically from reversing or, if necessary, from slight forward travel to stationary shaking when self-retaining forward travel is switched on (activated locking device).

Möchte der Bediener nun wieder in die maximale Vorwärtsfahrt gehen, drückt er den Umschaltbügel wieder nach vorne, wodurch der Raststift 21 die Begrenzung der Ausnehmung 24 (Rastkerbe) erneut überfährt. Die Federvorspannung wird dabei über eine Bedienkraftänderung am Umschaltbügel 2 als Rastung wahrgenommen.If the operator now wants to go back into maximum forward travel, he presses the changeover bar forward again, as a result of which the locking pin 21 again overruns the boundary of the recess 24 (locking notch). The spring preload is perceived as a detent via a change in the operating force on the switch bar 2.

Wird eine solche Rastung vom Bediener nicht gewünscht, kann er durch Zurückbewegen des Umschalthebels 26 die Rasteinrichtung 20 deaktivieren und somit die selbsthaltende Vorwärtsfahrt ausschalten. Wenn nun die Kolbenstange 6 bewegt wird, schiebt die Flanke der Ausnehmung 24 das komplette Druckstück 21 von der Kolbenstange 6 widerstandslos weg. Dieser Vorgang wird vom Bediener nicht wahrgenommen.If such a detent is not desired by the operator, he can deactivate the detent device 20 by moving the switching lever 26 back and thus switch off the self-locking forward drive. If the piston rod 6 is now moved, the edge of the recess 24 pushes the entire pressure piece 21 away from the piston rod 6 without resistance. This process is not noticed by the operator.

Bei einer Variante kann das Druckstück 21 auch mit einem Außengewinde versehen und mittels eines Werkzeugs in das Steuergehäuse 1 bzw. den Deichselkopf eingeschraubt werden. In diesem Fall ist eine nicht-werkzeuglose Zuschaltbarkeit nicht möglich.In a variant, the pressure piece 21 can also be provided with an external thread and screwed into the control housing 1 or the tiller head by means of a tool. In this case, it is not possible to connect without tools.

Bei einer anderen Variante kann das Druckstück 21 mit einem groben Gewinde versehen sein und von Hand über einen Drehhebel bis zu jeweiligen Endanschlägen ein- oder ausgeschraubt werden, womit eine werkzeuglose Zuschaltbarkeit gegeben ist. Das Gewinde kann derart gewählt werden, dass bereits eine halbe Umdrehung zur Zu- bzw. Abschaltung (Aktivierung und Deaktivierung der Rasteinrichtung) genügt.In another variant, the pressure piece 21 can be provided with a coarse thread and can be screwed in or out by hand using a rotary lever up to the respective end stops, which means that it can be switched on without tools. The thread can be selected in such a way that just half a turn is sufficient to switch it on or off (activation and deactivation of the latching device).

Der als Rastelement dienende Raststift 22 kann auch durch eine federvorgespannte Kugel ersetzt werden. In diesem Fall kann das Druckstück 21 auch als Standard-Kugeldruckstück realisiert sein.The locking pin 22 serving as a locking element can also be replaced by a spring-loaded ball. In this case, the pressure piece 21 can also be implemented as a standard ball pressure piece.

Das Druckstück 21 und somit die gesamte Rasteinrichtung 20 müssen nicht - wie in Fig. 3 gezeigt - von unten angeordnet sein. Ebenso ist eine Anordnung von oben oder von der Seite möglich.The pressure piece 21 and thus the entire latching device 20 do not have to - as in 3 shown - be arranged from below. An arrangement from above or from the side is also possible.

Claims (12)

  1. Control device for a ground compacter, having
    - a movable operating element (2) for specifying a running direction of the ground compacter by an operator;
    - a hydraulic master device having a master cylinder (5) in which a master piston (4) can be moved linearly in a reciprocating manner in order to generate a hydraulic signal;
    - a hydraulic connector (10) for coupling hydraulic components of the ground compacter and for transmitting the hydraulic signal from the master device; and having
    - a transfer device (7, 8) for transferring the movement of the operating element (2) into a linear movement of the master piston (4);
    wherein
    - the operating element (2) is movable between a first position (V) and a second position (R), wherein the first position corresponds to a maximum forward movement of the ground compacter and wherein the second position corresponds to a maximum reverse movement of the ground compacter;
    - a latching device (20) is provided for releasably holding the operating element (2) in a predetermined position;
    - the transfer device comprises a pinion shaft (8), which is coupled to the operating element (2), and a rack (7) which is coupled to the master piston (4);
    - the pinion shaft (8) meshes with the rack (7) in such a way that a rotation of the pinion shaft (8) effects a linear displacement of the rack (7);
    - the latching device (20) comprises a pressure piece (21) with a resiliently mounted latching element (22);
    - the latching device (20) also has a recess (24), into which the latching element (22) can be introduced;
    - the master piston (4) has a piston rod (6) in which the rack (7) is formed;
    - the recess (24) is formed in the piston rod (6); and wherein
    - a further, longitudinally extending recess (25), as a free travel area, is formed offset with respect to the recess (24) in a longitudinal direction of the piston rod (6).
  2. Control device as claimed in claim 1, wherein, the predetermined position corresponds to the first position.
  3. Control device as claimed in any one of the preceding claims, wherein the operating element (2) is releasably held by the latching device (20) in such a way that the operating element (2) can be moved out of the predetermined position by the operator using manual force by overcoming the latching device (20).
  4. Control device as claimed in any one of the preceding claims, wherein the latching device (20) is switchable into two operating states, namely into a first operating state, in which the releasable holding of the operating element (2) in the predetermined position can be effected by the latching device (20), and into a second operating state in which the latching device (20) produces no effect.
  5. Control device as claimed in any one of the preceding claims, wherein
    - the operating element (2) is movable in such a way that it can pivot about an axis (3); and wherein
    - the transfer device (7, 8) is formed for the transfer of the pivoting movement of the operating element (2) into a linear movement of the master piston (4).
  6. Control device as claimed in any one of the preceding claims, wherein
    - a control housing (1) is provided;
    - the operating element (2) is movably held on the control housing (1); and wherein
    - the master cylinder (5) and the master piston (4) are disposed in the control housing (2).
  7. Control device as claimed in any one of the preceding claims, wherein,
    - the pressure piece (21) is mounted in the control housing (1);
    - the recess (24) is formed on the master piston (4) or in the pinion shaft (8); and wherein
    - the latching element (22) is introduced into the recess (24) when the operating element (2) is in the predetermined position.
  8. Control device as claimed in any one of the preceding claims, wherein
    - the pressure piece (21) is mounted in the control housing (1) such that it can be moved between two positions;
    - the first position of the pressure piece (21) is defined in such a way that the latching element (22) of the pressure piece (21) can be introduced into the recess (24), whereas the second position of the pressure piece (21) is defined in such a way that the latching element (22) cannot be introduced into the recess (24); and wherein
    - a switchover device (26) is provided for defined moving and holding of the pressure piece (26) into the first position or into the second position.
  9. Control device as claimed in any one of the preceding claims, wherein
    - the switchover device comprises a pivotable lever (26) with an eccentric geometry; and wherein
    - the lever (26) is pivotable into two defined positions corresponding to the two positions of the pressure piece (21).
  10. Control device as claimed in any one of the preceding claims, wherein the operating element (2) is pivotable into a third position which is provided between the first position and the second position and which corresponds to a standstill of the ground compacter.
  11. Control device as claimed in any one of the preceding claims, wherein, the ground compacter is a vibratory plate.
  12. Vibratory plate having control device as claimed in any one of the preceding claims.
EP20162351.9A 2019-04-05 2020-03-11 Ground compacting device control device Active EP3719206B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019109021.0A DE102019109021A1 (en) 2019-04-05 2019-04-05 Control device for soil compacting device

Publications (2)

Publication Number Publication Date
EP3719206A1 EP3719206A1 (en) 2020-10-07
EP3719206B1 true EP3719206B1 (en) 2022-03-09

Family

ID=69804622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20162351.9A Active EP3719206B1 (en) 2019-04-05 2020-03-11 Ground compacting device control device

Country Status (4)

Country Link
US (1) US11608607B2 (en)
EP (1) EP3719206B1 (en)
DE (1) DE102019109021A1 (en)
DK (1) DK3719206T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019109028A1 (en) * 2019-04-05 2020-10-08 Wacker Neuson Produktion GmbH & Co. KG Control device for soil compacting device, with handle and speed lever

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1274854A (en) * 1960-11-22 1961-10-27 Teves Kg Alfred Transmission lever with ratchet mechanism
DE8402033U1 (en) 1984-01-25 1984-04-26 Dynapac Maskin AB, 17122 Solna Self-propelled hand-held machine
DE4016822A1 (en) * 1990-05-25 1991-11-28 Wacker Werke Kg Vibration plate for ground compacting - has activator producing vibrations with vector perpendicular to compactor plate and parallel to forward movement
DE4129915A1 (en) * 1991-04-03 1992-10-08 Weber Maschinentechnik Gmbh Safety device for power driven compacting roller - is controlled by spring-loaded handle which locks engine control lever
US20020150426A1 (en) * 2001-02-23 2002-10-17 Vandewinckel Stephen C. Quick adjustment mechanism for blade pitch of concrete power trowel
US7121762B2 (en) * 2001-10-09 2006-10-17 Somero Enterprises, Inc. Apparatus for screeding uncured concrete surfaces
DE102004048459A1 (en) * 2004-10-05 2006-04-13 Wacker Construction Equipment Ag Vibration plate with drawbar integrated in the remote control
DE102005029432A1 (en) * 2005-06-24 2006-12-28 Wacker Construction Equipment Ag Soil compacting device with automatic or operator-intuitive adjustment of advance vector comprises vibrating plate controlled so that the direction of action of force can be set in more than two locations or changed as wished
US7980783B2 (en) * 2006-12-22 2011-07-19 Jaszkowiak Timothy S Linear lost motion positioning mechanism

Also Published As

Publication number Publication date
US20200318308A1 (en) 2020-10-08
DK3719206T3 (en) 2022-05-09
EP3719206A1 (en) 2020-10-07
DE102019109021A1 (en) 2020-10-08
US11608607B2 (en) 2023-03-21

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