EP3333319B1 - Actuation unit for locking a component of a construction machine and construction machine with such an actuation unit - Google Patents
Actuation unit for locking a component of a construction machine and construction machine with such an actuation unit Download PDFInfo
- Publication number
- EP3333319B1 EP3333319B1 EP17206016.2A EP17206016A EP3333319B1 EP 3333319 B1 EP3333319 B1 EP 3333319B1 EP 17206016 A EP17206016 A EP 17206016A EP 3333319 B1 EP3333319 B1 EP 3333319B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- piston
- actuating unit
- construction machine
- milling drum
- 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.)
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- 238000010276 construction Methods 0.000 title claims description 47
- 238000003801 milling Methods 0.000 claims description 61
- 239000012530 fluid Substances 0.000 claims description 44
- 238000004891 communication Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims 1
- 230000000712 assembly Effects 0.000 description 19
- 238000000429 assembly Methods 0.000 description 19
- 239000000463 material Substances 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- 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
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/26—Rollers therefor; Such rollers usable also for compacting soil self-propelled or fitted to road vehicles
- E01C19/266—Rollers therefor; Such rollers usable also for compacting soil self-propelled or fitted to road vehicles fitted to vehicles, road-construction or earth-moving machinery, e.g. auxiliary roll readily movable to operative position ; provided with means for facilitating transport; Means for transporting rollers; Arrangements or attachments for converting vehicles into rollers, e.g. rolling sleeves for wheels
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- 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
- E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
- E01C23/088—Rotary tools, e.g. milling drums
-
- 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
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/26—Rollers therefor; Such rollers usable also for compacting soil self-propelled or fitted to road vehicles
- E01C19/264—Rollers therefor; Such rollers usable also for compacting soil self-propelled or fitted to road vehicles with attachments for work other than rolling, e.g. grading, scarifying
-
- 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
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
- E01C19/282—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows self-propelled, e.g. with an own traction-unit
-
- 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
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
- E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
- E02F3/764—Graders with the scraper blade mounted under the tractor chassis with the scraper blade being pivotable about a vertical axis
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type
Definitions
- the invention relates to an actuating unit for locking a component of a construction machine, in particular road milling machine or surface miner, wherein the actuating unit has a holding part for fastening the actuating unit to the construction machine.
- the invention relates to a self-propelled construction machine, in particular road milling machine or surface miner, with at least one such actuator unit.
- the known construction machines have a plurality of assemblies, each having a plurality of components.
- For the arrangement of all components is on the construction machine only a limited space available. Therefore, in principle, the aim is to arrange components of a construction machine close to each other.
- the assemblies of the known construction machines also include components that are mutually movable. For certain tasks of the construction machine, it is often required that a movable member can be engaged with another stationary member, so that the movable member is locked.
- a variety of locking devices are known. A simple and secure locking allows, for example, the use of a locking bolt. The locking bolt can be inserted by hand.
- Locking devices are also known which have an actuating unit having a piston / cylinder arrangement for moving the locking bolt. In these actuators, the piston of the piston / cylinder assembly is connected to the locking bolt in a linear arrangement so that the piston can actuate the locking bolt. This arrangement of piston / cylinder arrangement and locking bolt results in that the actuating unit has relatively large dimensions in the longitudinal direction.
- An object of the invention is to provide a universally applicable actuator unit for locking a component of a construction machine, in particular road milling machine or surface miner, on the one hand allows a simple and secure locking a component of the construction machine and on the other hand between other components of the construction machine even in tight spaces can be installed.
- the known road milling machines or surface miners have a machine frame carried by drives and a milling drum for working the floor, which is arranged in a milling drum housing, which is closed in the working direction behind the milling drum by a scraper blade. In the working direction in front of the milling drum, the milling drum housing is closed by a hold-down. On both sides of the milling drum edge protection can be provided.
- the scraper blade of the known road milling machines or surface miners extending transversely to the working direction can be arranged in a substantially vertical plane between a lowered position in which the scraper blade rests with its lower edge on the ground or directly above the ground, and a raised position to be moved.
- the scraper blade can also be pivoted generally about a pivot axis which is parallel to the Fräswalzenachse so that the milling drum is accessible for inspection and maintenance purposes.
- the DE 35 28 038 A1 describes a road milling machine with a scraper blade, which is also referred to as a material collecting flap.
- the operation of the scraper blade is carried out with a piston-cylinder assembly in conjunction with a slotted guide, which initially allows a lifting movement of the scraper blade in a vertical plane and then a pivoting movement.
- the disadvantage is that the piston-cylinder arrangement, which is intended to enable not only a lifting movement, but also a pivoting movement of the scraper blade, has a relatively large length in order to perform both movements in succession.
- the EP 0 685 598 A1 ( US 5,474,397 A ) describes a road milling machine with a scraper blade, which is actuated by an actuating device which has several Piston-cylinder arrangements features.
- an actuating device which has several Piston-cylinder arrangements features.
- locking devices are provided which have a Verrieglungsbolzen which is guided longitudinally displaceably in a cylindrical bore of a housing.
- a pin is provided, which is connected to the Verrieglungsbolzen.
- the piston-cylinder assemblies have again in this milling machine again a relatively large length in order to perform the lifting and pivoting movement sequentially.
- the manual operation of the pin for locking or unlocking the scraper blade on larger machines is no longer practicable, as would be required to adjust the pin in the appropriate dimensioning of the components to large forces.
- DE 28 33 533 A1 describes a compressed air cylinder which has an axially displaceable operating part 5.
- the compressed air cylinder has an end closed cylinder 1, in which a piston 3 is arranged. Between the ends of the cylinder 1 extends a slot 2 through which the actuating part 5 extends, which is connected to the piston.
- the piston moves to one of the two sides, whereby the operating member 5 moves in the slot 2.
- the DE 10 2014 011856 A1 describes a self-propelled construction machine having a machine frame carried by drives and a milling drum for working the floor, which is arranged in a Fräswalzengephaseuse, which is closed in the working direction behind the milling drum of a scraper blade.
- Another object of the invention is to provide a self-propelled construction machine, in particular road milling machine or surface miner, with a two-part scraper blade, which allows a reliable working height adjustment.
- the invention is in particular the object to solve the problem of locking one of the two stripping elements even in tight spaces.
- the basic principle of the actuating unit according to the invention lies in the design of the cylinder of a piston / cylinder arrangement as a "locking pin".
- the actuating unit according to the invention for locking a component of a construction machine has a holding part for attachment to the construction machine.
- the holding part can be designed differently. In the holding part, it is only important that a secure attachment to a component of the construction machine is guaranteed.
- the holding part can also consist of several individual parts. The attachment of the holding part to a component of the construction machine need only serve to secure the position of the operating unit, d. H. do not absorb large forces or torques, in particular not the forces or torques that may occur due to the locking of the component.
- a piston is connected to the holding part, which is enclosed by a cylinder around the entire circumference to form a first cylinder space on one side of the piston and a second cylinder space on the other side of the piston.
- the piston may be an integral part of the holding part.
- Holding part, piston or cylinder can also each consist of several individual parts.
- the holding part has an elongated body or is formed as an elongated body whose longitudinal axis perpendicular to the longitudinal axis of the cylinder.
- the holding part is in a particularly preferred embodiment, a rod, in particular a cylindrical rod, which can be securely fastened with a suitable holder which may be provided on a component of the construction machine.
- the rod can be fixed in the holder by clamping. But it is also possible to weld the rod with a component of the construction machine. Also, an attachment by positive locking is possible.
- the "piston" in the actuating unit according to the invention is not a movable in a fixed cylinder member, because not the cylinder, but the piston is connected via the holding part with a stationary component on the construction machine.
- the cylinder forms together with the piston on one side of the piston a first cylinder space and on the other side of the piston a second cylinder space, wherein the first cylinder space is in fluid communication with a first fluid port and is in fluid communication with the second cylinder space, a second fluid port.
- the cylindrical wall of the cylinder extending in the direction of the longitudinal axis of the cylinder recess is provided, through which extends the holding part.
- the holding part may be guided in the longitudinally extending recess, so that the cylinder can not rotate relative to the holding part.
- actuating unit is a "piston / cylinder arrangement" in a broader sense, the relevant components are referred to as pistons and cylinders.
- pistons and cylinders the relevant components are referred to as pistons and cylinders.
- the "piston” connected to the stationary holding part is immovable and the cylinder "is movable with respect to the stationary holding part.”
- a cylinder is also understood to mean a body which, although a cylindrical bore for having the piston, but the outer peripheral surface is not cylindrical over the entire length. It is advantageous, however, if the cylinder is designed as a cylindrical securing bolt.
- the "locking bolt" can absorb relatively large forces.
- the wall thickness of the cylinder can be dimensioned accordingly.
- the fluid connections can in principle be provided on the cylinder or the piston. However, it is advantageous if the first and second fluid connection are provided on the piston, wherein the first and second fluid connection extend through the recess of the cylindrical wall of the cylinder, since the connections then do not move during locking and unlocking. In addition, a particularly compact design is achieved with this arrangement.
- the known connections for fluid lines in particular hydraulic or compressed air lines, can be used, to which hydraulic or compressed air lines can be connected.
- a preferred embodiment provides that the first fluid port is arranged on the piston on one side of the holding part and the second fluid port on the piston on the other side of the holding part, wherein on the one side of the holding part in the piston one of the first fluid port to the first cylinder chamber leading first fluid channel and on the other side of the holding part in which a piston from the second fluid port to the second cylinder chamber leading second fluid channel is formed.
- the cylinder has an outer cylinder part and at least one inner cylinder part which is inserted into the outer cylinder part on one side, and at least one inner cylinder part which is inserted into the outer cylinder part on the other side.
- the recess for the holding part is in this embodiment in the cylindrical wall of the outer cylinder part between the at least one inner cylinder part on one side of the outer cylinder part and the at least one inner cylinder part provided on the other side of the outer cylinder part.
- the one end of the piston may be guided in the at least one inner cylinder part on one side of the outer cylinder part and the other end of the piston in the at least one inner cylinder part on the other side of the outer cylinder part.
- the middle portion of the piston may be guided in the outer cylinder part.
- the actuating unit according to the invention can be used universally.
- a particularly preferred use of the actuating unit is the use in a self-propelled construction machine, in particular road milling machine or surface miner.
- the construction machine may have one or more of the actuating units according to the invention, wherein in each case two arbitrary components, which are connected to each other movable relative to each other, at least one operating unit can be assigned to bring the two components into engagement. If one of the two components is movable and the other immovable, d. H. is stationary, the movable member can be locked.
- a recess for receiving the cylinder of the actuating unit is provided on one of the two movably interconnected components, wherein the holding part of the actuating unit is fastened to the other component in such a way that the cylinder acts on the first or second cylinder space is advanced with a fluid into the recess, so that the two components are engaged with each other.
- the second or first cylinder chamber is acted upon by a fluid, the cylinder is withdrawn from the recess, so that the two components are disengaged.
- a holder for fastening the holding part is preferably provided, then that the assembly is simplified.
- the holding part can also be screwed, plugged (positive connection) or welded, for example.
- the attachment of the holding part may be a clamping fixation.
- a further preferred embodiment provides that on the component of the construction machine, to which the holding part is to be attached, at least one support member is provided with a recess in which the cylinder or in which the cylinder is displaceable. This ensures that the forces or torques occurring during the locking are not absorbed solely by the holding part or its holder, but are essentially absorbed by the "locking bolt".
- the cylinder is slidably guided in the recess of the at least one support member so that forces or torques are received in both the locked and the unlocked position of the at least one support member.
- the at least one support member can thus receive not only the forces or torques occurring during the locking, but also the weight of the actuating unit.
- the holding part itself or its holder can thus be dimensioned correspondingly light. This then serves only to secure the position.
- the advantages of the actuating unit according to the invention come in particular in the locking of one of the two stripping elements of a two-part scraper blade of a construction machine, in particular milling machine or surface miner to bear.
- the construction machine according to the invention with the actuating unit is characterized in that the scraper blade can be operated easily and safely.
- the operating unit can be mounted easily even in confined spaces.
- the scraper blade of the construction machine has an upper stripping element which is pivotally mounted on a component of the machine frame or Fräswalzengephaseuses about a parallel to the Fräswalzenachse pivot axis, and has a lower stripping element, with respect to the upper stripping between a lowered position on the ground and a raised Position is displaced.
- the construction machine may comprise one or more of the actuation units according to the invention.
- the recess for receiving the cylinder of the at least one actuating unit is provided on a component of the machine frame or Fräswalzengephaseuses, and the holding part of the actuating unit is attached to the upper scraper element such that the cylinder in a loading of the first and second cylinder chamber with a fluid in the Recess is advanced, so that the upper stripping element is locked, and the cylinder is retracted with an act of the second and first cylinder chamber with a fluid from the recess, so that the upper stripping element is unlocked.
- an actuating device is provided, which is designed such that when the upper stripping element is locked, the lower stripping between the lowered and raised position is displaceable and unlocked upper stripping the lower and upper stripping about the pivot axis from the operating position in a raised Position are pivotable.
- the wiper blade actuator may have multiple piston / cylinder arrangements.
- the actuating device has a first piston / cylinder arrangement and a second piston / cylinder arrangement, which are arranged at a distance from one another on the scraper blade.
- a first operating unit is disposed in an area between the first piston / cylinder arrangement and a side part of the machine frame or milling drum housing, and a second operating unit is arranged in a region between the second piston / cylinder arrangement and a side part of the machine frame.
- the recess for receiving the cylinder of the actuating unit is provided in the side part of the machine frame or Fräswalzengephinuses.
- the kinematics are designed such that the two-part scraper blade can be both lifted and pivoted with only a pair of piston / cylinder assemblies.
- piston / cylinder arrangements instead of two piston / cylinder arrangements, however, only one piston / cylinder arrangement or more than two piston / cylinder arrangements can be provided in order to carry out both movements. But it is also possible to and pivoting movement separate from each other with one or more piston / cylinder assemblies.
- a further preferred embodiment provides that the cylinders of the first and second piston / cylinder arrangement are pivotable on a component of the machine frame or milling drum housing about an axis extending parallel to the pivot axis of the scraper blade and the pistons of the first and second piston / cylinder arrangement are secured in the region of the lower portion of the lower stripping element.
- the first and second actuating unit are arranged in the region of the lower portion of the upper scraper element.
- Fig. 1 shows as an example of a self-propelled construction machine, a road milling machine for milling road surfaces made of asphalt, concrete or the like.
- the road milling machine has a machine frame 2 carried by a chassis 1.
- the chassis 1 comprises front and rear drives 1A, 1B, which are arranged on the right and left sides of the machine frame 2 in the working direction A.
- the drives 1A, 1B are mounted on lifting columns 3A, 3B mounted on the machine frame 2 so that the machine frame 2 is adjustable with respect to the ground Bin of height.
- the road milling machine has a milling drum 4, which is equipped with milling tools, not shown.
- the milling drum 4 is arranged on the machine frame 2 between the front and rear drives 1A, 1B in a milling drum housing 5.
- the axis of rotation 6 of the milling drum 4 extends transversely to the working direction A of the milling machine.
- the Fräswalzengeophuse 5 is at the front in the working direction A side of a in Fig. 1 not shown down and at the back of a in Fig. 1 Not Shield shown closed, which is also referred to as a scraper.
- On the longitudinal sides of the roller housing is closed by an edge protection 7.
- the milled milled material can be removed with a transport device 8.
- Above the Fräswalzengephinuses 5 is located on the machine frame 2, the control station. 9
- the scraper blade 10 has a lower scraper element 11 and an upper scraper element 12, wherein the lower scraper element 11 is arranged in the working direction A in front of the upper scraper element 12.
- Both stripping elements 11, 12 are substantially rectangular plates.
- the upper stripping element 12 is fastened to a component of the milling drum housing 5 so as to be pivotable about a pivot axis 13, which runs parallel to the axis of rotation 6 of the milling drum 4.
- the lower stripping element 11 has two guide elements 14 arranged at a distance from one another, which are guided in two spaced-apart guides 15 of the upper stripping element 12, so that the lower stripping element 11 can be displaced relative to the upper stripping element 12.
- the actuator 16 for actuating the scraper blade 10 has a pair of piston / cylinder assemblies 17 which are spaced from each other.
- the first piston / cylinder assembly 17 is on one side and the second piston / cylinder assembly 17 is disposed on the other side of the scraper blade 10 at a distance from the respective edge of the scraper blade.
- the cylinders of the piston / cylinder assemblies 17 are pivotally mounted on holders 20 of the milling drum housing 5 about a pivot axis 21 which is parallel to the axis of rotation 6 of the milling drum 4 and the pivot axis 13 of the scraper blade 10.
- the pistons or piston rods 19 of the piston / cylinder arrangements 17 are pivotably attached to holders 22 of the lower scraper element 11 about a pivot axis 23 which runs parallel to the pivot axis 21 of the piston / cylinder assemblies 17.
- the upper stripping element 12 can be locked to side parts 24 of the milling drum housing 5.
- the actuating device 16 has two locking devices 25, which each have the actuating unit according to the invention.
- the locking means 25 are arranged between the piston / cylinder assemblies 17 and the side parts 24 of the roller housing 5.
- Fig. 9 shows a first embodiment of the actuating unit of the locking devices 25.
- the actuating unit has a holding part 26, which is a cylindrical rod in the present embodiment.
- the holding part 26 is connected to a piston 27, wherein the longitudinal axis of the holding part 26 and the longitudinal axis of the piston 27 form a right angle.
- one end piece of the holding part 26 is inserted into a recess 28 of the piston 27 and the holding part 26 is screwed to the piston 27 by means of a screw 29.
- the recess 28 in the piston 27 is located midway between the piston ends.
- the piston is enclosed by a cylinder 30 to form a first cylinder space 31 on one side of the piston and a second cylinder space 32 on the other side of the piston.
- the holding part 26 extends through a recess 33 in the cylindrical wall of the cylinder, wherein the recess 33 extends in the longitudinal direction of the cylinder 30.
- the width of the recess 33 corresponds to the diameter of the holding part 26, so that holding part 26 and cylinder 30 can not be rotated against each other.
- the cylinder 30 is closed at both ends with caps 34, 35, which can be screwed.
- the sealing of piston 27 and cylinder 30 takes place with the known sealing packages 36, which sit in annular grooves 37 of the piston 27 or cylinder 30.
- fluid ports 38, 39 which are inserted into recesses 40, 41 of the piston 27.
- the fluid ports 38, 39 are in the present embodiment conventional connections for hydraulic lines, not shown. From the first fluid port 38, a first fluid passage 42 leads to the one piston end and from the second fluid port 39 leads second fluid channel 43 the other piston end, so that the first and second cylinder chamber 31, 32 can be acted upon with hydraulic oil.
- the holding member 26 of the operating unit is fixed with a bracket 44 which is provided on the lower portion of the upper scraper element 12 between the piston / cylinder assembly 17 and the side wall 24.
- the holder 44 has a bore 45 into which the holding part 26 is inserted.
- the holding part can be clamped by means of a clamping screw 46 ( FIGS. 2 to 8 ).
- the cylinder 30 moves to the one side while the cylinder 30 moves to the other side when the second cylinder space 32 is supplied with hydraulic oil.
- Chamfers 47 are provided on the end walls of the piston 27, so that the end face of the piston is effective for the hydraulic oil when the cylinder is in one of the two end positions.
- the cylinder 30 therefore constitutes a "safety bolt" which can be advanced and retracted.
- the two end pieces of the cylinder 30 are slidably guided in recesses 49 of support members 50, which are secured to the lower end portion of the upper stripping element 12 at a distance from each other.
- the advanced position engages the one end of the cylinder 30 in a recess 48 which is provided in the side wall 24 of the Fräswalzengephaseuses 5, wherein the end pieces sit in the recesses 49 of the two support members 50.
- the retracted position the one end is not in the recess 48 of the side wall 24, but only in the recess 49 of the support member 50.
- the upper stripping member 12 is engaged with the side member 24, i.e., disengaged. H. be locked or unlocked.
- the forces or torques that may occur due to the locking are absorbed by the support members 50.
- the function of the scraper blade 10 and the actuator 16 will be described in detail.
- the pistons or piston rods 19 and cylinder 18 of the piston / cylinder assemblies 17 are formed in such a way and their pivot axes 21, 23 are arranged such that a Actuation of the piston / cylinder assemblies 17 to the subsequent movements of the stripping elements 11, 12 leads.
- Fig. 2 shows the scraper blade 10 in a substantially vertical position, so that the milling drum housing 5 is closed in the working direction A behind the milling drum 4.
- the lower stripping element 11 is in the lowered position, in which the piston or piston rods 19 of the piston / cylinder assemblies 17 extended and the upper stripping element 12 is locked, ie the cylinder 30 is seated in the recess 48. In this locked position can lower stripping 11 are raised.
- the pistons or piston rods 19 of the piston / cylinder arrangements 17 are retracted.
- Fig. 3 shows the lower stripping element 11 in the raised position, in which the piston / cylinder assemblies 17 are fully retracted. Consequently, the milling drum housing 5 is open below the upper stripping element 12.
- a closable material outlet 53 for example a flap, can be provided between the piston / cylinder arrangements 17. Therefore, the piston / cylinder assemblies 17 should be arranged in the greatest possible distance from each other, so that the largest possible material outlet can be formed. This results in cramped space conditions in the region of the two sides of the scraper blade 10. It turns out that with the actuation units according to the invention despite the tight space a secure locking is possible.
- FIGS. 4 and 5 show how the scraper blade is folded up about the pivot axis 13.
- Attached to the lower stripping element 11 are entrainment elements 52 associated with the two actuation units, which can engage the actuators' cylinders 30 when the upper stripping element 12 is unlocked and the cylinders 30 are retracted. In this position, the end pieces of the cylinder 30 protrude a little from the recesses 49 of the inner support members 50, so that the driving elements 52 can abut against the cylinders 30 during the upward movement of the lower stripping element 11.
- the upper stripping element 12 is unlocked.
- actuation of the piston / cylinder assemblies 17 results in pivotal movement of the scraper blade 10 about the pivot axis 13.
- This pivotal movement begins when the follower members 52 engage the protruding end portions of the cylinders 30 during the upward movement of the lower scraper member 11 the actuators come into engagement.
- Fig. 5 shows the position of the scraper blade 10, in which the piston / cylinder assemblies 17 are fully retracted, so that the scraper blade is completely folded up.
- the entrainment elements 52 are arranged on the lower stripping element such that the pivoting movement begins even when the lower stripping element is not yet in the highest position ( Fig. 3 ).
- the pivoting movement begins even in a height position in which the vertical upward movement of the lower scraper element 11 is not yet completed. Therefore, the piston / cylinder assemblies 17 may have a shorter length than when the pivoting movement takes place only when the lower stripping element 11 is fully raised.
- Fig. 10 shows a second embodiment of the actuating unit, which differs only in the structure, but not in the function of the first embodiment.
- the corresponding parts are denoted by the same reference numerals.
- the second embodiment differs from the first embodiment in that the cylinder 30 includes an outer cylinder part 30A and two inner cylinder parts 30B, 30C on one side and two inner cylinder parts 30B, 30C on the other side.
- the multi-part design of the cylinder 30 has manufacturing advantages, since the grooves 37 for the seal packages 36 can easily bring.
- the first and second cylinder chambers 31, 32 extend into the outer, inner cylinder part 30C.
- the outer, inner cylinder parts 30C act as cover parts or caps, which can be screwed to the outer cylinder part 30A.
- the holding part 26 has at one end a shoulder 26A with an external thread 26B and the piston 27 has an internal thread 51 in order to be able to screw both parts together.
- the other end piece has a hexagonal profile 26C for a spanner.
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Description
Die Erfindung betrifft eine Betätigungseinheit zur Verriegelung eines Bauteils einer Baumaschine, insbesondere Straßenfräsmaschine oder Surface-Miner, wobei die Betätigungseinheit ein Halteteil zur Befestigung der Betätigungseinheit an der Baumaschine aufweist. Darüber hinaus betrifft die Erfindung eine selbstfahrende Baumaschine, insbesondere Straßenfräsmaschine oder Surface-Miner, mit mindestens einer derartigen Betätigungseinheit.The invention relates to an actuating unit for locking a component of a construction machine, in particular road milling machine or surface miner, wherein the actuating unit has a holding part for fastening the actuating unit to the construction machine. Moreover, the invention relates to a self-propelled construction machine, in particular road milling machine or surface miner, with at least one such actuator unit.
Die bekannten Baumaschinen verfügen über eine Vielzahl von Baugruppen, die jeweils eine Vielzahl von Bauteilen aufweisen. Für die Anordnung sämtlicher Bauteile steht auf der Baumaschine nur ein begrenzter Raum zur Verfügung. Daher wird grundsätzlich angestrebt, Bauteile einer Baumaschine dicht nebeneinander anzuordnen.The known construction machines have a plurality of assemblies, each having a plurality of components. For the arrangement of all components is on the construction machine only a limited space available. Therefore, in principle, the aim is to arrange components of a construction machine close to each other.
Zu den Baugruppen der bekannten Baumaschinen gehören auch Bauteile, die gegeneinander beweglich sind. Für bestimmte Aufgaben der Baumaschine ist es vielfach erforderlich, dass ein bewegliches Bauteil mit einem anderen unbeweglichen Bauteil in Eingriff gebracht werden kann, so dass das bewegliche Bauteil verriegelt ist. Zur Verriegelung beweglicher Bauteile sind die unterschiedlichsten Verriegelungseinrichtungen bekannt. Eine einfache und sichere Verriegelung erlaubt beispielsweise die Verwendung eines Verriegelungsbolzens. Der Verriegelungsbolzen kann von Hand eingesetzt werden. Es sind auch Verriegelungseinrichtungen bekannt, die über eine Betätigungseinheit verfügen, die eine Kolben/Zylinder-Anordnung aufweist, um den Verriegelungsbolzen zu bewegen. Bei diesen Betätigungseinheiten ist der Kolben der Kolben/Zylinder-Anordnung mit dem Verriegelungsbolzen in einer linearen Anordnung verbunden, so dass der Kolben den Verriegelungsbolzen betätigen kann. Diese Anordnung von Kolben/Zylinder-Anordnung und Verriegelungsbolzen führt dazu, dass die Betätigungseinheit in Längsrichtung relative große Abmessungen hat.The assemblies of the known construction machines also include components that are mutually movable. For certain tasks of the construction machine, it is often required that a movable member can be engaged with another stationary member, so that the movable member is locked. For locking movable components, a variety of locking devices are known. A simple and secure locking allows, for example, the use of a locking bolt. The locking bolt can be inserted by hand. Locking devices are also known which have an actuating unit having a piston / cylinder arrangement for moving the locking bolt. In these actuators, the piston of the piston / cylinder assembly is connected to the locking bolt in a linear arrangement so that the piston can actuate the locking bolt. This arrangement of piston / cylinder arrangement and locking bolt results in that the actuating unit has relatively large dimensions in the longitudinal direction.
Eine Aufgabe der Erfindung ist, eine universell einsetzbare Betätigungseinheit zur Verriegelung eines Bauteils einer Baumaschine, insbesondere Straßenfräsmaschine oder Surface-Miner, zu schaffen, die einerseits eine einfache und sichere Verriegelung eines Bauteils der Baumaschine erlaubt und andererseits zwischen anderen Bauteilen der Baumaschine auch bei beengten Platzverhältnissen eingebaut werden kann.An object of the invention is to provide a universally applicable actuator unit for locking a component of a construction machine, in particular road milling machine or surface miner, on the one hand allows a simple and secure locking a component of the construction machine and on the other hand between other components of the construction machine even in tight spaces can be installed.
Die bekannten Straßenfräsmaschinen oder Surface-Miner weisen einen von Laufwerken getragenen Maschinenrahmen und eine Fräswalze zur Bearbeitung des Bodens auf, die in einem Fräswalzengehäuse angeordnet ist, das in Arbeitsrichtung hinter der Fräswalze von einem Abstreifschild verschlossen ist. In Arbeitsrichtung vor der Fräswalze ist das Fräswalzengehäuse von einem Niederhalter verschlossen. An beiden Seiten der Fräswalze kann ein Kantenschutz vorgesehen sein.The known road milling machines or surface miners have a machine frame carried by drives and a milling drum for working the floor, which is arranged in a milling drum housing, which is closed in the working direction behind the milling drum by a scraper blade. In the working direction in front of the milling drum, the milling drum housing is closed by a hold-down. On both sides of the milling drum edge protection can be provided.
Das sich quer zur Arbeitsrichtung erstreckende Abstreifschild der bekannten Straßenfräsmaschinen oder Surface-Miner kann in einer im Wesentlichen vertikalen Ebene zwischen einer abgesenkten Position, in der das Abstreifschild mit seiner unteren Kante auf dem Boden aufliegt oder unmittelbar oberhalb des Bodens angeordnet ist, und einer angehobenen Position bewegt werden. Das Abstreifschild kann im Allgemeinen auch um eine Schwenkachse verschwenkt werden, die parallel zur Fräswalzenachse verläuft, so dass die Fräswalze für Inspektions- und Wartungszwecke zugänglich ist.The scraper blade of the known road milling machines or surface miners extending transversely to the working direction can be arranged in a substantially vertical plane between a lowered position in which the scraper blade rests with its lower edge on the ground or directly above the ground, and a raised position to be moved. The scraper blade can also be pivoted generally about a pivot axis which is parallel to the Fräswalzenachse so that the milling drum is accessible for inspection and maintenance purposes.
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Bei Straßenfräsmaschinen oder Surface-Minern sollte zwischen den Führungen des Abstreifschildes oder den Kolben-/Zylinderanordnungen für einen möglichen Materialauslass in dem Abstreifschild ein möglichst großer Abstand quer zur Arbeitsrichtung verbleiben. Die Führungen oder Kolben-/Zylinderanordnungen des Abstreifschildes sollten auch möglichst weit auseinander liegen, um ein Verkanten des Abstreifschildes beim Anheben oder Absenken zu vermeiden. Diese Anordnung hat zur Folge, dass zwischen den Seitenteilen des Fräswalzengehäuses und den Führungen bzw. Kolben-/Zylinderanordnungen nur ein verhältnismäßig kleiner Raum verbleibt.In road milling machines or surface miners should remain between the guides of the scraper blade or the piston / cylinder assemblies for a possible material outlet in the Abstreifschild the largest possible distance across the direction. The guides or piston / cylinder arrangements of the scraper blade should also be as far apart as possible in order to avoid tilting of the scraper blade when lifting or lowering. This arrangement has the consequence that only a relatively small space remains between the side parts of the milling drum housing and the guides or piston / cylinder arrangements.
Eine weitere Aufgabe der Erfindung ist, eine selbstfahrende Baumaschine, insbesondere Straßenfräsmaschine oder Surface-Miner, mit einem zweiteiligen Abstreifschild zu schaffen, das eine zuverlässig arbeitende Höhenverstellung erlaubt. Der Erfindung liegt insbesondere die Aufgabe zugrunde, das Problem der Verriegelung eines der beiden Abstreifelemente auch bei beengten Platzverhältnissen zu lösen.Another object of the invention is to provide a self-propelled construction machine, in particular road milling machine or surface miner, with a two-part scraper blade, which allows a reliable working height adjustment. The invention is in particular the object to solve the problem of locking one of the two stripping elements even in tight spaces.
Die Lösung dieser Aufgaben erfolgt erfindungsgemäß mit den Merkmalen des Patentanspruchs 1. Die abhängigen Patentansprüche betreffen bevorzugte Ausführungsformen der Erfindung.The solution of these objects is achieved according to the invention with the features of claim 1. The dependent claims relate to preferred embodiments of the invention.
Das Grundprinzip der erfindungsgemäßen Betätigungseinheit liegt in der Ausbildung des Zylinders einer Kolben-/Zylinderanordnung als "Verriegelungsbolzen".The basic principle of the actuating unit according to the invention lies in the design of the cylinder of a piston / cylinder arrangement as a "locking pin".
Die erfindungsgemäße Betätigungseinheit zur Verriegelung eines Bauteils einer Baumaschine, insbesondere Straßenfräsmaschine oder Surface-Miner, verfügt über ein Halteteil zur Befestigung an der Baumaschine. Das Halteteil kann unterschiedlich ausgebildet sein. Bei dem Halteteil kommt es nur darauf an, dass eine sichere Befestigung an einem Bauteil der Baumaschine gewährleistet ist. Das Halteteil kann auch aus mehreren Einzelteilen bestehen. Die Befestigung des Halteteils an einem Bauteil der Baumaschine braucht nur der Sicherung der Lage der Betätigungseinheit zu dienen, d. h. keine größeren Kräfte oder Drehmomente aufnehmen, insbesondere nicht die Kräfte oder Drehmomente, die durch die Verriegelung des Bauteils auftreten können.The actuating unit according to the invention for locking a component of a construction machine, in particular road milling machine or surface miner, has a holding part for attachment to the construction machine. The holding part can be designed differently. In the holding part, it is only important that a secure attachment to a component of the construction machine is guaranteed. The holding part can also consist of several individual parts. The attachment of the holding part to a component of the construction machine need only serve to secure the position of the operating unit, d. H. do not absorb large forces or torques, in particular not the forces or torques that may occur due to the locking of the component.
Bei der erfindungsgemäßen Betätigungseinheit ist mit dem Halteteil ein Kolben verbunden, welcher von einem Zylinder unter Bildung eines ersten Zylinderraums auf der einen Seite des Kolbens und eines zweiten Zylinderraums auf der anderen Seite des Kolbens um den gesamten Umfang umschlossen wird. Der Kolben kann einstückiger Bestandteil des Halteteils sein. Halteteil, Kolben oder Zylinder können auch jeweils aus mehreren Einzelteilen bestehen. Eine bevorzugte Ausführungsform sieht vor, dass das Halteteil einen langgestreckten Körper aufweist oder als ein langgestreckter Körper ausgebildet ist, dessen Längsachse senkrecht zur Längsachse des Zylinders verläuft. Das Halteteil ist bei einer besonders bevorzugten Ausführungsform eine Stange, insbesondere eine zylindrische Stange, die sich mit einer geeigneten Halterung, die an einem Bauteil der Baumaschine vorgesehen sein kann, sicher befestigen lässt. Beispielsweise kann die Stange in der Halterung klemmend fixiert werden. Es ist aber auch möglich, die Stange mit einem Bauteil der Baumaschine zu verschweißen. Auch ist eine Befestigung durch Formschluss möglich.In the actuating unit according to the invention a piston is connected to the holding part, which is enclosed by a cylinder around the entire circumference to form a first cylinder space on one side of the piston and a second cylinder space on the other side of the piston. The piston may be an integral part of the holding part. Holding part, piston or cylinder can also each consist of several individual parts. A preferred embodiment provides that the holding part has an elongated body or is formed as an elongated body whose longitudinal axis perpendicular to the longitudinal axis of the cylinder. The holding part is in a particularly preferred embodiment, a rod, in particular a cylindrical rod, which can be securely fastened with a suitable holder which may be provided on a component of the construction machine. For example, the rod can be fixed in the holder by clamping. But it is also possible to weld the rod with a component of the construction machine. Also, an attachment by positive locking is possible.
Im Gegensatz zu einer konventionellen Kolben-Zylinderanordnung stellt der "Kolben" bei der erfindungsgemäßen Betätigungseinheit nicht ein in einem feststehenden Zylinder bewegliches Bauteil dar, weil nicht der Zylinder, sondern der Kolben über das Halteteil mit einem ortsfesten Bauteil an der Baumaschine verbunden wird.In contrast to a conventional piston-cylinder arrangement, the "piston" in the actuating unit according to the invention is not a movable in a fixed cylinder member, because not the cylinder, but the piston is connected via the holding part with a stationary component on the construction machine.
Der Zylinder bildet zusammen mit dem Kolben auf der einen Seite des Kolbens einen ersten Zylinderraum und auf der anderen Seite des Kolbens einen zweiten Zylinderraum, wobei mit dem ersten Zylinderraum ein erster Fluidanschluss in Fluidverbindung steht und mit dem zweiten Zylinderraum ein zweiter Fluidanschluss in Fluidverbindung steht. In der zylindrischen Wand des Zylinders ist eine sich in Richtung der Längsachse des Zylinders erstreckende Ausnehmung vorgesehen, durch welche sich das Halteteil erstreckt. Das Halteteil kann in der sich in Längsrichtung erstreckenden Ausnehmung geführt sein, so dass sich der Zylinder nicht gegenüber dem Halteteil verdrehen kann.The cylinder forms together with the piston on one side of the piston a first cylinder space and on the other side of the piston a second cylinder space, wherein the first cylinder space is in fluid communication with a first fluid port and is in fluid communication with the second cylinder space, a second fluid port. In the cylindrical wall of the cylinder extending in the direction of the longitudinal axis of the cylinder recess is provided, through which extends the holding part. The holding part may be guided in the longitudinally extending recess, so that the cylinder can not rotate relative to the holding part.
Wenn einer der beiden Zylinderräume mit einem Fluid, beispielsweise Hydraulikflüssigkeit oder Druckluft beaufschlagt wird, bewegt sich der Zylinder auf die eine bzw. andere Seite, während das Halteteil ortsfest ist. Folglich stellt der Zylinder einen "Verriegelungsbolzen" dar, der vorgeschoben oder zurückgezogen werden kann. Die Mittel zur Betätigung des "Verriegelungsbolzens" sind quasi Bestandteil des Bolzens.When one of the two cylinder chambers is subjected to a fluid, for example hydraulic fluid or compressed air, the cylinder moves to one side or the other, while the holding part is stationary. Consequently, the cylinder constitutes a "locking pin" which can be advanced or retracted. The means for actuating the "locking bolt" are virtually part of the bolt.
Da es sich bei der Betätigungseinheit im weiteren Sinne um eine "Kolben-/Zylinderanordnung" handelt, werden die betreffenden Bauteile als Kolben und Zylinder bezeichnet. Allerdings ist der mit dem ortfesten Halteteil verbundene "Kolben" unbeweglich und der Zylinder" gegenüber dem ortsfesten Halteteil beweglich. Unter einem Zylinder wird auch ein Körper verstanden, der zwar eine zylindrische Bohrung für den Kolben aufweist, dessen äußere Umfangsfläche aber nicht über die gesamte Länge zylindrisch ist. Von Vorteil ist aber, wenn der Zylinder als ein zylindrischer Sicherungsbolzen ausgebildet ist.Since the actuating unit is a "piston / cylinder arrangement" in a broader sense, the relevant components are referred to as pistons and cylinders. However, the "piston" connected to the stationary holding part is immovable and the cylinder "is movable with respect to the stationary holding part." A cylinder is also understood to mean a body which, although a cylindrical bore for having the piston, but the outer peripheral surface is not cylindrical over the entire length. It is advantageous, however, if the cylinder is designed as a cylindrical securing bolt.
Da der Zylinder im Vergleich zu dem Kolben einen relativ großen Außendurchmesser hat, kann der "Verriegelungsbolzen" relativ große Kräfte aufnehmen. Die Wandstärke des Zylinders kann entsprechend dimensioniert werden.Since the cylinder has a relatively large outer diameter compared to the piston, the "locking bolt" can absorb relatively large forces. The wall thickness of the cylinder can be dimensioned accordingly.
Die Fluidanschlüsse können grundsätzlich an dem Zylinder oder dem Kolben vorgesehen sein. Von Vorteil ist aber, wenn der erste und zweite Fluidanschluss an dem Kolben vorgesehen sind, wobei sich der erste und zweite Fluidanschluss durch die Ausnehmung der zylindrischen Wand des Zylinders erstrecken, da sich die Anschlüsse dann beim Ver- und Entriegeln nicht bewegen. Darüber hinaus wird mit dieser Anordnung eine besonders kompakte Bauform erreicht. Als Fluidanschlüsse können die bekannten Anschlüsse für Fluidleitungen, insbesondere Hydraulik- oder Druckluftleitungen, verwendet werden, an denen sich Hydraulik- bzw. Druckluftleitungen anschließen lassen.The fluid connections can in principle be provided on the cylinder or the piston. However, it is advantageous if the first and second fluid connection are provided on the piston, wherein the first and second fluid connection extend through the recess of the cylindrical wall of the cylinder, since the connections then do not move during locking and unlocking. In addition, a particularly compact design is achieved with this arrangement. As fluid connections, the known connections for fluid lines, in particular hydraulic or compressed air lines, can be used, to which hydraulic or compressed air lines can be connected.
Eine bevorzugte Ausführungsform sieht vor, dass der erste Fluidanschluss an dem Kolben auf der einen Seite des Halteteils und der zweite Fluidanschluss an dem Kolben auf der anderen Seite des Halteteils angeordnet ist, wobei auf der einen Seite des Halteteils in dem Kolben ein von dem ersten Fluidanschluss zu dem ersten Zylinderraum führender erster Fluidkanal und auf der anderen Seite des Halteteils in dem Kolben ein von dem zweiten Fluidanschluss zu dem zweiten Zylinderraum führender zweiter Fluidkanal ausgebildet ist. Dadurch ergibt sich eine symmetrische Anordnung, bei der das Fluid zentral zugeführt werden kann.A preferred embodiment provides that the first fluid port is arranged on the piston on one side of the holding part and the second fluid port on the piston on the other side of the holding part, wherein on the one side of the holding part in the piston one of the first fluid port to the first cylinder chamber leading first fluid channel and on the other side of the holding part in which a piston from the second fluid port to the second cylinder chamber leading second fluid channel is formed. This results in a symmetrical arrangement in which the fluid can be supplied centrally.
Bei einer weiteren bevorzugten Ausführungsform verfügt der Zylinder über ein äußeres Zylinderteil und mindestens ein inneres Zylinderteil, das an der einen Seite in das äußere Zylinderteil eingesetzt ist, und mindestens ein inneres Zylinderteil, das an der anderen Seite in das äußere Zylinderteil eingesetzt ist. Die Ausnehmung für das Halteteil ist bei dieser Ausführungsform in der zylindrischen Wand des äußeren Zylinderteils zwischen dem mindestens einen inneren Zylinderteil an der einen Seite des äußeren Zylinderteils und dem mindestens einen inneren Zylinderteil an der anderen Seite des äußeren Zylinderteils vorgesehen. Dabei kann das eine Endstück des Kolbens in dem mindestens einen inneren Zylinderteil an der einen Seite des äußeren Zylinderteils und das andere Endstück des Kolbens in dem mindestens einen inneren Zylinderteil an der anderen Seite des äußeren Zylinderteils geführt sein. Der mittlere Abschnitt des Kolbens kann in dem äußeren Zylinderteil geführt sein. Die Verwendung von Einsatzteilen bietet insofern fertigungstechnische Vorteile als sich die Einsatzteile leichter bearbeiten lassen. Beispielsweise lassen sich die Einsatzteile ohne großen fertigungstechnischen Aufwand leicht mit Nuten für Dichtungspakete versehen.In another preferred embodiment, the cylinder has an outer cylinder part and at least one inner cylinder part which is inserted into the outer cylinder part on one side, and at least one inner cylinder part which is inserted into the outer cylinder part on the other side. The recess for the holding part is in this embodiment in the cylindrical wall of the outer cylinder part between the at least one inner cylinder part on one side of the outer cylinder part and the at least one inner cylinder part provided on the other side of the outer cylinder part. In this case, the one end of the piston may be guided in the at least one inner cylinder part on one side of the outer cylinder part and the other end of the piston in the at least one inner cylinder part on the other side of the outer cylinder part. The middle portion of the piston may be guided in the outer cylinder part. The use of inserts offers manufacturing advantages in that the inserts can be processed easily. For example, the insert parts can be easily provided with grooves for sealing packages without great manufacturing effort.
Die erfindungsgemäße Betätigungseinheit kann universell eingesetzt werden. Eine besonders bevorzugte Verwendung der Betätigungseinheit ist der Einsatz in einer selbstfahrende Baumaschine, insbesondere Straßenfräsmaschine oder Surface-Miner.The actuating unit according to the invention can be used universally. A particularly preferred use of the actuating unit is the use in a self-propelled construction machine, in particular road milling machine or surface miner.
Die Baumaschine kann über eine oder mehrere der erfindungsgemäßen Betätigungseinheiten verfügen, wobei jeweils zwei beliebigen Bauteilen, die relativ zueinander beweglich miteinander verbunden sind, wenigstens eine Betätigungseinheit zugeordnet werden kann, um die beiden Bauteile in Eingriff zu bringen. Wenn eines der beiden Bauteile beweglich und das andere unbeweglich, d. h. ortsfest ist, kann das bewegliche Bauteil verriegelt werden.The construction machine may have one or more of the actuating units according to the invention, wherein in each case two arbitrary components, which are connected to each other movable relative to each other, at least one operating unit can be assigned to bring the two components into engagement. If one of the two components is movable and the other immovable, d. H. is stationary, the movable member can be locked.
Bei einer bevorzugten Ausführungsform der Baumaschine ist an einem der beiden beweglich miteinander verbundenen Bauteile eine Ausnehmung zur Aufnahme des Zylinders der Betätigungseinheit vorgesehen, wobei das Halteteil der Betätigungseinheit an dem anderen Bauteil derart befestigt ist, dass der Zylinder bei einer Beaufschlagung des ersten bzw. zweiten Zylinderraums mit einem Fluid in die Ausnehmung vorgeschoben ist, so dass die beiden Bauteile miteinander im Eingriff sind. Bei einer Beaufschlagung des zweiten bzw. ersten Zylinderraums mit einem Fluid ist der Zylinder aus der Ausnehmung zurückgezogen, so dass die beiden Bauteile außer Eingriff sind.In a preferred embodiment of the construction machine, a recess for receiving the cylinder of the actuating unit is provided on one of the two movably interconnected components, wherein the holding part of the actuating unit is fastened to the other component in such a way that the cylinder acts on the first or second cylinder space is advanced with a fluid into the recess, so that the two components are engaged with each other. When the second or first cylinder chamber is acted upon by a fluid, the cylinder is withdrawn from the recess, so that the two components are disengaged.
An dem Bauteil der Baumaschine, an dem das Halteteil der Betätigungseinheit befestigt werden soll, ist vorzugsweise eine Halterung zur Befestigung des Halteteils vorgesehen, so dass die Montage vereinfacht ist. Das Halteteil kann aber beispielsweise auch verschraubt, gesteckt (Formschluss) oder verschweißt werden. Die Befestigung des Halteteils kann eine klemmende Fixierung sein.On the component of the construction machine, on which the holding part of the actuating unit is to be fastened, a holder for fastening the holding part is preferably provided, then that the assembly is simplified. However, the holding part can also be screwed, plugged (positive connection) or welded, for example. The attachment of the holding part may be a clamping fixation.
Eine weitere bevorzugte Ausführungsform sieht vor, das an dem Bauteil der Baumaschine, an dem das Halteteil befestigt werden soll, mindestens ein Stützteil mit einer Ausnehmung vorgesehen ist, in dem der Zylinder oder in das der Zylinder verschiebbar ist. Dadurch wird erreicht, dass die bei der Verrieglung auftretenden Kräfte oder Drehmomente nicht allein von dem Halteteil bzw. dessen Halterung aufgenommen werden, sondern im Wesentlichen von dem "Verriegelungsbolzen" aufgenommen werden. Vorzugsweise ist der Zylinder in der Ausnehmung des mindestens einen Stützteils verschiebbar geführt, so dass Kräfte oder Drehmomente sowohl in der verriegelten als auch der entriegelten Stellung von dem mindestens einen Stützteil aufgenommen werden. Das mindestens eine Stützteil kann somit nicht nur die bei der Verriegelung auftreten Kräfte oder Drehmomente, sondern auch die Gewichtskraft der Betätigungseinheit aufnehmen. Das Halteteil selbst bzw. dessen Halterung können somit entsprechend leicht dimensioniert sein. Dieses dient dann lediglich der Lagesicherung.A further preferred embodiment provides that on the component of the construction machine, to which the holding part is to be attached, at least one support member is provided with a recess in which the cylinder or in which the cylinder is displaceable. This ensures that the forces or torques occurring during the locking are not absorbed solely by the holding part or its holder, but are essentially absorbed by the "locking bolt". Preferably, the cylinder is slidably guided in the recess of the at least one support member so that forces or torques are received in both the locked and the unlocked position of the at least one support member. The at least one support member can thus receive not only the forces or torques occurring during the locking, but also the weight of the actuating unit. The holding part itself or its holder can thus be dimensioned correspondingly light. This then serves only to secure the position.
Die Vorteile der erfindungsgemäßen Betätigungseinheit kommen insbesondere bei der Verriegelung eines der beiden Abstreifelemente eines zweiteiligen Abstreifschildes einer Baumaschine, insbesondere Fräsmaschine oder Surface-Miner, zum Tragen. Die erfindungsgemäße Baumaschine mit der Betätigungseinheit zeichnet sich dadurch aus, dass sich das Abstreifschild einfach und sicher bedienen lässt. Dabei lässt sich die Betätigungseinheit auch bei beengten Platzverhältnissen einfach montieren.The advantages of the actuating unit according to the invention come in particular in the locking of one of the two stripping elements of a two-part scraper blade of a construction machine, in particular milling machine or surface miner to bear. The construction machine according to the invention with the actuating unit is characterized in that the scraper blade can be operated easily and safely. The operating unit can be mounted easily even in confined spaces.
Das Abstreifschild der erfindungsgemäßen Baumaschine verfügt über ein oberes Abstreifelement, das an einem Bauteil des Maschinenrahmens oder Fräswalzengehäuses um eine zur Fräswalzenachse parallele Schwenkachse verschwenkbar befestigt ist, und ein unteres Abstreifelement aufweist, das gegenüber dem oberen Abstreifelement zwischen einer auf den Boden abgesenkten Position und einer angehobenen Position verschiebbar ist.The scraper blade of the construction machine according to the invention has an upper stripping element which is pivotally mounted on a component of the machine frame or Fräswalzengehäuses about a parallel to the Fräswalzenachse pivot axis, and has a lower stripping element, with respect to the upper stripping between a lowered position on the ground and a raised Position is displaced.
Die Baumaschine kann eine oder mehrere der erfindungsgemäßen Betätigungseinheiten umfassen. Die Ausnehmung zur Aufnahme des Zylinders der mindestens einen Betätigungseinheit ist an einem Bauteil des Maschinenrahmens oder Fräswalzengehäuses vorgesehen, und das Halteteil der Betätigungseinheit ist an dem oberen Abstreifelement derart befestigt, dass der Zylinder bei einer Beaufschlagung des ersten bzw. zweiten Zylinderraums mit einem Fluid in die Ausnehmung vorgeschoben ist, so dass das obere Abstreifelement verriegelt ist, und der Zylinder bei einer Beaufschlagung der zweiten bzw. ersten Zylinderkammer mit einem Fluid aus der Ausnehmung zurückgezogen ist, so dass das obere Abstreifelement entriegelt ist.The construction machine may comprise one or more of the actuation units according to the invention. The recess for receiving the cylinder of the at least one actuating unit is provided on a component of the machine frame or Fräswalzengehäuses, and the holding part of the actuating unit is attached to the upper scraper element such that the cylinder in a loading of the first and second cylinder chamber with a fluid in the Recess is advanced, so that the upper stripping element is locked, and the cylinder is retracted with an act of the second and first cylinder chamber with a fluid from the recess, so that the upper stripping element is unlocked.
Für die Betätigung des Abstreifschildes ist eine Betätigungseinrichtung vorgesehen, die derart ausgebildet ist, dass bei verriegeltem oberen Abstreifelement das untere Abstreifelement zwischen der abgesenkten und angehobenen Position verschiebbar ist und bei entriegeltem oberen Abstreifelement das untere und obere Abstreifelement um die Schwenkachse aus der Betriebsstellung in eine angehobene Position verschwenkbar sind.For the operation of the scraper blade an actuating device is provided, which is designed such that when the upper stripping element is locked, the lower stripping between the lowered and raised position is displaceable and unlocked upper stripping the lower and upper stripping about the pivot axis from the operating position in a raised Position are pivotable.
Die Betätigungseinrichtung für das Abstreifschild kann über mehrere Kolben-/Zylinderanordnungen verfügen. Bei einer bevorzugten Ausführungsform verfügt die Betätigungseinrichtung über eine erste Kolben-/Zylinderanordnung und eine zweite Kolben-/Zylinderanordnung, die im Abstand zueinander an dem Abstreifschild angeordnet sind. Eine erste Betätigungseinheit ist in einem Bereich zwischen der ersten Kolben-/Zylinder-Anordnung und einem Seitenteil des Maschinenrahmens oder Fräswalzengehäuses und eine zweite Betätigungseinheit ist in einem Bereich zwischen der zweiten Kolben-/Zylinder-Anordnung und einem Seitenteil des Maschinenrahmens angeordnet. Die Ausnehmung zur Aufnahme des Zylinders der Betätigungseinheit ist in dem Seitenteil des Maschinenrahmens oder Fräswalzengehäuses vorgesehen.The wiper blade actuator may have multiple piston / cylinder arrangements. In a preferred embodiment, the actuating device has a first piston / cylinder arrangement and a second piston / cylinder arrangement, which are arranged at a distance from one another on the scraper blade. A first operating unit is disposed in an area between the first piston / cylinder arrangement and a side part of the machine frame or milling drum housing, and a second operating unit is arranged in a region between the second piston / cylinder arrangement and a side part of the machine frame. The recess for receiving the cylinder of the actuating unit is provided in the side part of the machine frame or Fräswalzengehäuses.
Die Kinematik ist derart ausgelegt, dass sich das zweiteilige Abstreifschild mit nur einem Paar von Kolben-/Zylinderanordnungen sowohl anheben als auch verschwenken lässt. Anstelle von zwei Kolben-/Zylinderanordnungen kann aber auch nur eine Kolben-/Zylinderanordnung oder es können auch mehr als zwei Kolben-/Zylinderanordnungen vorgesehen sein, um beide Bewegungen auszuführen. Es ist aber auch möglich, die Hub- und Schwenkbewegung getrennt voneinander jeweils mit einer oder mehreren Kolben-/Zylinderanordnungen auszuführen.The kinematics are designed such that the two-part scraper blade can be both lifted and pivoted with only a pair of piston / cylinder assemblies. Instead of two piston / cylinder arrangements, however, only one piston / cylinder arrangement or more than two piston / cylinder arrangements can be provided in order to carry out both movements. But it is also possible to and pivoting movement separate from each other with one or more piston / cylinder assemblies.
Eine weitere bevorzugte Ausführungsform sieht vor, dass die Zylinder der ersten und zweiten Kolben-/Zylinderanordnung an einem Bauteil des Maschinenrahmens oder Fräswalzengehäuses um eine parallel zu der Schwenkachse des Abstreifschildes verlaufende Achse verschwenkbar und die Kolben bzw. Kolbenstangen der ersten und zweiten Kolben-/Zylinderanordnung im Bereich des unteren Teilstücks des unteren Abstreifelements befestigt sind. Vorzugsweise sind die erste und zweite Betätigungseinheit im Bereich des unteren Teilstücks des oberen Abstreifelements angeordnet.A further preferred embodiment provides that the cylinders of the first and second piston / cylinder arrangement are pivotable on a component of the machine frame or milling drum housing about an axis extending parallel to the pivot axis of the scraper blade and the pistons of the first and second piston / cylinder arrangement are secured in the region of the lower portion of the lower stripping element. Preferably, the first and second actuating unit are arranged in the region of the lower portion of the upper scraper element.
Im Folgenden wird ein Ausführungsbeispiel der Erfindung unter Bezugnahme auf die Zeichnungen im Einzelnen beschrieben.Hereinafter, an embodiment of the invention will be described in detail with reference to the drawings.
Es zeigen:
- Fig. 1
- eine Straßenfräsmaschine in der Seitenansicht als Beispiel für eine selbstfahrende Baumaschine,
- Fig. 2
- ein zweiteiliges Abstreifschild einer Baumaschine zusammen mit einer Betätigungseinrichtung für das Abstreifschild sowie Teile des Fräswalzengehäuses und die Fräswalze in perspektivischer Darstellung, wobei sich das untere Abstreifelement in einer abgesenkten Position befindet,
- Fig. 3
- das Abstreifschild von
Fig. 2 , wobei sich das untere Abstreifelement in einer angehobenen Position befindet, - Fig. 4
- das Abstreifschild von
Fig. 2 , wobei sich das untere und obere Abstreifelement in einer unteren Schwenkposition befindet, - Fig. 5
- das Abstreifschild von
Fig. 2 , wobei sich das untere und obere Abstreifelement in einer oberen Schwenkposition befindet, - Fig. 6
- eine Seitenansicht des Abstreifschildes zusammen mit der Betätigungseinrichtung und Teilen des Fräswalzengehäuses,
- Fig. 7
- einen Teilschnitt entlang der Linie A-A von
Fig. 6 , - Fig. 8
- eine Draufsicht auf das Abstreifschild von
Fig. 6 , - Fig. 9
- ein erstes Ausführungsbeispiel der erfindungsgemäßen Betätigungseinheit und
- Fig. 10
- ein zweites Ausführungsbeispiel der erfindungsgemäßen Betätigungseinheit.
- Fig. 1
- a road milling machine in the side view as an example of a self-propelled construction machine,
- Fig. 2
- a two-part scraper blade of a construction machine together with an actuating device for the scraper blade and parts of the milling drum housing and the milling drum in a perspective view, wherein the lower scraper element is in a lowered position,
- Fig. 3
- the scraper shield of
Fig. 2 with the lower scraper element in a raised position, - Fig. 4
- the scraper shield of
Fig. 2 , wherein the lower and upper scraper element is in a lower pivot position, - Fig. 5
- the scraper shield of
Fig. 2 , wherein the lower and upper scraper element is in an upper pivot position, - Fig. 6
- a side view of the Abstreifschildes together with the actuator and parts of the Fräswalzengehäuses,
- Fig. 7
- a partial section along the line AA of
Fig. 6 . - Fig. 8
- a plan view of the scraper of
Fig. 6 . - Fig. 9
- a first embodiment of the actuator unit according to the invention and
- Fig. 10
- A second embodiment of the actuator unit according to the invention.
Die Straßenfräsmaschine verfügt über eine Fräswalze 4, die mit nicht dargestellten Fräswerkzeugen bestückt ist. Die Fräswalze 4 ist am Maschinenrahmen 2 zwischen den vorderen und hinteren Laufwerken 1A, 1 B in einem Fräswalzengehäuse 5 angeordnet. Die Drehachse 6 der Fräswalze 4 verläuft quer zu der Arbeitsrichtung A der Fräsmaschine. Das Fräswalzengehäuse 5 ist an der in Arbeitsrichtung A vorderen Seite von einem in
Nachfolgend werden das zweiteilige Abstreifschild und die Betätigungseinrichtung für das Abstreifschild der erfindungsgemäßen Baumaschine unter Bezugnahme auf die
Das Abstreifschild 10 weist ein unteres Abstreifelement 11 und ein oberes Abstreifelement 12 auf, wobei das untere Abstreifelement 11 in Arbeitsrichtung A vor dem oberen Abstreifelement 12 angeordnet ist. Beide Abstreifelemente 11, 12 sind im Wesentlichen rechteckförmige Platten. Das obere Abstreifelement 12 ist an einem Bauteil des Fräswalzengehäuses 5 um eine Schwenkachse 13 verschwenkbar befestigt, die parallel zu der Drehachse 6 der Fräswalze 4 verläuft. Das untere Abstreifelement 11 weist zwei im Abstand zueinander angeordnete Führungselemente 14 auf, die in zwei im Abstand zueinander angeordneten Führungen 15 des oberen Abstreifelements 12 geführt sind, so dass das untere Abstreifelement 11 gegenüber dem oberen Abstreifelement 12 verschoben werden kann.The
Die Betätigungseinrichtung 16 zur Betätigung des Abstreifschildes 10 weist ein Paar von Kolben-/Zylinderanordnungen 17 auf, die im Abstand zueinander angeordnet sind. Die erste Kolben-/Zylinderanordnung 17 ist auf der einen Seite und die zweite Kolben-/Zylinderanordnung 17 ist auf der anderen Seite des Abstreifschildes 10 im Abstand zu dem jeweiligen Rand des Abstreifschildes angeordnet. Die Zylinder der Kolben-/Zylinderanordnungen 17 sind an Halterungen 20 des Fräswalzengehäuses 5 um eine Schwenkachse 21 verschwenkbar befestigt, die parallel zu der Drehachse 6 der Fräswalze 4 und der Schwenkachse 13 des Abstreifschildes 10 verläuft. Die Kolben bzw. Kolbenstangen 19 der Kolben-/Zylinderanordnungen 17 sind an Halterungen 22 des unteren Abstreifelements 11 um eine Schwenkachse 23 verschwenkbar befestigt, die parallel zu der Schwenkachse 21 der Kolben-/Zylinderanordnungen 17 verläuft. Das obere Abstreifelement 12 kann an Seitenteilen 24 des Fräswalzengehäuses 5 verriegelt werden. Zur Verrieglung des oberen Abstreifelements 12 weist die Betätigungseinrichtung 16 zwei Verriegelungseinrichtungen 25 auf, die jeweils über die erfindungsgemäße Betätigungseinheit verfügen. Die Verriegelungseinrichtungen 25 sind zwischen den Kolben-/Zylinderanordnungen 17 und den Seitenteilen 24 des Walzengehäuses 5 angeordnet.The
Zu beiden Seiten des Halteteils 26 befinden sich an dem Kolben 27 Fluidanschlüsse 38, 39, die in Ausnehmungen 40, 41 des Kolbens 27 eingesetzt sind. Die Fluidanschlüsse 38, 39 sind bei dem vorliegenden Ausführungsbeispiel konventionelle Anschlüsse für nicht dargestellte Hydraulikleitungen. Von dem ersten Fluidanschluss 38 führt ein erster Fluidkanal 42 zu dem einen Kolbenende und von dem zweiten Fluidanschluss 39 führt ein zweiten Fluidkanal 43 dem anderen Kolbenende, so dass der erste und zweite Zylinderraum 31, 32 mit Hydrauliköl beaufschlagt werden kann.On both sides of the holding
Das Halteteil 26 der Betätigungseinheit wird mit einer Halterung 44 befestigt, die an dem unteren Teilstück des oberen Abstreifelements 12 zwischen der Kolben-/Zylinderanordnung 17 und der Seitenwand 24 vorgesehen ist. Die Halterung 44 weist eine Bohrung 45 auf, in die das Halteteil 26 eingesetzt wird. Das Halteteil kann mittels einer Klemmschraube 46 verklemmt werden (
Wenn der erste Zylinderraum 31 mit Hydrauliköl beaufschlagt wird, bewegt sich der Zylinder 30 zu der einen Seite, während sich der Zylinder 30 zu der anderen Seite bewegt, wenn der zweite Zylinderraum 32 mit Hydrauliköl beaufschlagt wird. An den Stirnwänden des Kolbens 27 sind Fasen 47 vorgesehen, so dass für das Hydrauliköl die Stirnfläche des Kolbens wirksam ist, wenn sich der Zylinder in einer der beiden Endpositionen befindet. Der Zylinder 30 stellt daher einen "Sicherungsbolzen" dar, der vorgeschoben und zurückgezogen werden kann.When the
Die beiden Endstücke des Zylinders 30 sind verschiebbar in Ausnehmungen 49 von Stützteilen 50 geführt, die an dem unteren Endstück des oberen Abstreifelements 12 im Abstand zueinander befestigt sind. In der vorgeschobenen Position greift das eine Endstück des Zylinders 30 in eine Ausnehmung 48 ein, die in der Seitenwand 24 des Fräswalzengehäuses 5 vorgesehen ist, wobei die Endstücke in den Ausnehmungen 49 der beiden Stützteile 50 sitzen. In der zurückgezogenen Position befindet sich das eine Endstück nicht in der Ausnehmung 48 der Seitenwand 24, sondern nur in der Ausnehmung 49 des Stützteils 50. Folglich kann das obere Abstreifelement 12 mit dem Seitenteil 24 in Eingriff bzw. außer Eingriff gebracht, d. h. verriegelt oder entriegelt werden. Die Kräfte oder Drehmomente, die durch die Verriegelung auftreten können, werden von den Stützteilen 50 aufgenommen. Nachfolgend wird die Funktion des Abstreifschildes 10 und der Betätigungseinrichtung 16 im Einzelnen beschrieben.The two end pieces of the
Die Kolben bzw. Kolbenstangen 19 und Zylinder 18 der Kolben-/Zylinderanordnungen 17 sind derart ausgebildet und deren Schwenkachsen 21, 23 sind derart angeordnet, dass eine Betätigung der Kolben-/Zylinderanordnungen 17 zu den nachfolgenden Bewegungen der Abstreifelemente 11, 12 führt.The pistons or
In dem oberen Abstreifelement 12 kann zwischen den Kolben-/Zylinderanordnungen 17 ein verschließbarer Materialauslass 53, beispielsweise eine Klappe, vorgesehen sein. Daher sollten die Kolben-/Zylinderanordnungen 17 in einem möglichst großen Abstand zueinander angeordnet sein, damit ein möglichst großer Materialauslass gebildet werden kann. Daraus ergeben sich beengte Platzverhältnisse im Bereich der beiden Seiten des Abstreifschildes 10. Es zeigt sich, dass mit den erfindungsgemäßen Betätigungseinheiten trotz der beengten Platzverhältnisse eine sichere Verriegelung möglich ist.In the upper stripping
Die
Zum Hochklappen des Abstreifschildes 10 wird das obere Abstreifelement 12 entriegelt. Wenn das obere Abstreifelement 12 entriegelt ist, führt eine Betätigung der Kolben-/Zylinderanordnungen 17 zu einer Schwenkbewegung des Abstreifschildes 10 um die Schwenkachse 13. Diese Schwenkbewegung beginnt, wenn die Mitnahmeelemente 52 während der Aufwärtsbewegung des unteren Abstreifelements 11 mit den vorstehenden Endstücken der Zylinder 30 der Betätigungseinheiten in Eingriff kommen.
Claims (15)
- Actuating unit for locking a component of a construction machine, in particular a road milling machine or a road miner, comprising a retaining part (26) for fastening to the construction machine, a piston (27) being connected to the retaining part (26) and being surrounded by a cylinder (30) around the whole circumference, with a first cylinder chamber (31) being formed on one side of the piston and a second cylinder chamber (32) being formed on the other side of the piston, a first fluid connection (38) being in fluid communication with the first cylinder chamber (31) and a second fluid connection (39) being in fluid communication with the second cylinder chamber (32), and a cut-out (33) which extends in the direction of the longitudinal axis of the cylinder and through which the retaining part (26) extends being provided in the cylindrical wall of the cylinder (30).
- Actuating unit according to claim 1, characterised in that the first and the second fluid connection (38, 39) are provided on the piston (27), the first and the second fluid connection (38, 39) extending through the cut-out (33) in the cylindrical wall of the cylinder (27).
- Actuating unit according to claim 2, characterised in that the first fluid connection (38) is arranged on the piston (27) on one side of the retaining part (26) and the second fluid connection (39) is arranged on the piston (27) on the other side of the retaining part, a first fluid channel (42) leading from the first fluid connection (38) to the first cylinder chamber (31) being formed on one side of the retaining part (26) in the piston (27) and a second fluid channel (43) leading from the second fluid connection (39) to the second cylinder chamber (32) being formed on the other side of the retaining part (26) in the piston (27).
- Actuating unit according to any of claims 1 to 3, characterised in that the retaining part (27) comprises an elongate body, the longitudinal axis of which extends perpendicularly to the longitudinal axis of the cylinder (30).
- Actuating unit according to claim 4, characterised in that the retaining part (26) is a cylindrical rod.
- Actuating unit according to any of claims 1 to 5, characterised in that the cylinder (30) comprises an outer cylinder part (30A) and at least one inner cylinder part (30B, 30C) that is inserted into the outer cylinder part on one side of the outer cylinder part (30A), and at least one inner cylinder part (30B, 30C) that is inserted into the outer cylinder part on the other side of the outer cylinder part (30A), the cut-out (33) in the cylindrical wall of the outer cylinder part (30A) being provided between the at least one inner cylinder part (30B, 30C) on one side of the outer cylinder part (30A) and the at least one inner cylinder part (30B, 30C) on the other side of the outer cylinder part (30A).
- Actuating unit according to claim 6, characterised in that one end part of the piston (27) is arranged in the at least one inner cylinder part (30B, 30C) on one side of the outer cylinder part and the other end part of the piston (27) is arranged in the at least one inner cylinder part (30B, 30C) on the other side of the outer cylinder part.
- Self-propelled construction machine, in particular a road milling machine or a road miner, comprising at least two movably interconnected components and at least one actuating unit according to any of claims 1 to 7 that is assigned to the two movably interconnected components.
- Self-propelled construction machine according to claim 8, characterised in that a cut-out (49) for receiving the cylinder (30) of the actuating unit is provided on one of the two movably interconnected components, and the retaining part (26) of the actuating unit is fastened to the other component such that the cylinder (30) is pushed forward into the cut-out when the first or second cylinder chamber (31, 32) is supplied with a fluid such that the two components are in engagement, and the cylinder (30) is pulled back out of the cut-out when the second or first cylinder chamber (32, 31) is supplied with a fluid such that the two components are out of engagement.
- Self-propelled construction machine according to claim 9, characterised in that at least one support part (50) comprising a cut-out (49) in which the cylinder (30) can be slid or into which the cylinder (30) can be slid is provided on the component to which the retaining part (26) is fastened.
- Self-propelled construction machine according to any of claims 8 to 10, characterised in that a mount (44) for fastening the retaining part (26) of the actuating unit is provided on the component to which the retaining part (26) is fastened.
- Self-propelled construction machine according to any of claims 8 to 11, characterised in that the construction machine comprises a machine frame (2) supported by running gears (1A, 1B) and a milling drum (4) for machining the ground that is arranged in a milling drum housing (5), which can be closed off by a scraper plate (10) behind the milling drum (4) in the working direction (A),
the scraper plate (10) comprising an upper scraper element (12) that is fastened to a component of the machine frame (2) or milling drum housing (5) so as to be pivotable about a pivot axis (13) that is parallel to the milling drum axis (6), and comprising a lower scraper element (11) that is movable relative to the upper scraper element (12) between a position in which it is lowered onto the ground and a raised position,
at least one cut-out (48) for receiving the cylinder (30) of the at least one actuating unit being provided on a component of the machine frame (2) or milling drum housing, and the retaining part (26) of the at least one actuating unit being fastened to the upper scraper element (12) such that the cylinder (30) is pushed forward into the cut-out (48) when the first or second cylinder chamber (31, 32) is supplied with a fluid such that the upper scraper element (12) is locked, and the cylinder (30) is pulled back out of the cut-out (48) when the second or first cylinder chamber (32, 31) is supplied with a fluid such that the upper scraper element (12) is unlocked,
and an actuating device (16) being provided which is designed such that, when the upper scraper element (12) is locked, the lower scraper element (11) can be moved between the lowered and the raised position and, when the upper scraper element (12) is unlocked, the lower and the upper scraper element (11, 12) can be pivoted about the pivot axis (13) into a raised position. - Self-propelled construction machine according to claim 12, characterised in that the actuating device comprises a first piston/cylinder arrangement (17) and a second piston/cylinder arrangement (17), which are arranged on the scraper plate (10) at a distance from one another, a first actuating unit being arranged in a region between the first piston/cylinder arrangement (17) and a side part (24) of the machine frame (2) or milling drum housing and a second actuating unit being arranged in a region between the second piston/cylinder arrangement (17) and a side part (24) of the machine frame (2) or milling drum housing, the cut-out (48) for receiving the cylinder (30) of the actuating unit being provided in the side part (24) of the machine frame (2) or milling drum housing.
- Self-propelled construction machine according to claim 13, characterised in that the cylinders (18) of the first and second piston/cylinder arrangement (17) can be pivoted about an axis (21) extending in parallel with the pivot axis (13) of the scraper plate (10) on a component of the machine frame (2) or milling drum housing, and the pistons or piston rods (19) of the first and second piston/cylinder arrangement (17) are fastened in the region of the lower portion of the lower scraper element (11).
- Self-propelled construction machine according to either claim 13 or claim 14, characterised in that the first and the second actuating units are arranged in the region of the lower portion of the upper scraper element (12).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102016014585.4A DE102016014585A1 (en) | 2016-12-08 | 2016-12-08 | Actuating unit for locking a component of a construction machine and construction machine with such an actuating unit |
Publications (2)
Publication Number | Publication Date |
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EP3333319A1 EP3333319A1 (en) | 2018-06-13 |
EP3333319B1 true EP3333319B1 (en) | 2019-08-14 |
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EP17206016.2A Active EP3333319B1 (en) | 2016-12-08 | 2017-12-07 | Actuation unit for locking a component of a construction machine and construction machine with such an actuation unit |
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Country | Link |
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US (1) | US10590612B2 (en) |
EP (1) | EP3333319B1 (en) |
CN (2) | CN108179690B (en) |
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DE102016014585A1 (en) * | 2016-12-08 | 2018-06-14 | Wirtgen Gmbh | Actuating unit for locking a component of a construction machine and construction machine with such an actuating unit |
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DE102012012395A1 (en) | 2012-06-25 | 2014-01-02 | Wirtgen Gmbh | road milling machine |
DE102014011856B4 (en) * | 2014-08-08 | 2024-04-04 | Bomag Gmbh | Large milling machine of the medium rotor type with a replaceable milling part and method for changing a milling part |
DE102016014585A1 (en) | 2016-12-08 | 2018-06-14 | Wirtgen Gmbh | Actuating unit for locking a component of a construction machine and construction machine with such an actuating unit |
-
2016
- 2016-12-08 DE DE102016014585.4A patent/DE102016014585A1/en not_active Withdrawn
-
2017
- 2017-11-22 US US15/820,755 patent/US10590612B2/en active Active
- 2017-12-07 EP EP17206016.2A patent/EP3333319B1/en active Active
- 2017-12-08 CN CN201711294175.8A patent/CN108179690B/en active Active
- 2017-12-08 CN CN201721697959.0U patent/CN208362872U/en not_active Withdrawn - After Issue
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
US20180163351A1 (en) | 2018-06-14 |
CN108179690A (en) | 2018-06-19 |
DE102016014585A1 (en) | 2018-06-14 |
CN108179690B (en) | 2020-09-15 |
US10590612B2 (en) | 2020-03-17 |
EP3333319A1 (en) | 2018-06-13 |
CN208362872U (en) | 2019-01-11 |
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