EP3159452B1 - Front loader - Google Patents
Front loader Download PDFInfo
- Publication number
- EP3159452B1 EP3159452B1 EP16188770.8A EP16188770A EP3159452B1 EP 3159452 B1 EP3159452 B1 EP 3159452B1 EP 16188770 A EP16188770 A EP 16188770A EP 3159452 B1 EP3159452 B1 EP 3159452B1
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- EP
- European Patent Office
- Prior art keywords
- front loader
- locking
- parking
- rocker
- teeth
- 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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- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
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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
- E02F3/627—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor
- E02F3/6273—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor using legs to support the beams or arms on the ground during the connecting process
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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
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
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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
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/34—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
Definitions
- the invention relates to a front loader for a tractor, with at least one front loader rocker and mounted on the front loader swing parking stand device for parking the front loader, wherein the parking stand device comprises a pivotally mounted on the front loader swing parking support, which is pivotable from an operating position to a parking position, wherein the parking stand device a locking strut fixed at one end to the front loader rocker and arranged on the parking support and at a free end of the locking strut associated and engageable locking elements by which the park support is latched in a plurality of positions supporting the front loader.
- front loaders for moving material with a tractor
- front loaders can be mounted or coupled to the tractor by means of a frame console provided on the tractor.
- the front loader usually has two parallel guided wings, which extend at the front end of the tractor and with a corresponding loading tool, such as a blade, a gripper, a loading fork, etc. are equipped, the rockers and the front loader tool usually actuated by hydraulic or electrical actuators are.
- On the wings of the front loader parking stand devices may be provided which comprise a swing-out parking support, which can be brought into a parking position and locked in this.
- the front loader In the parking position, the front loader can be disconnected from the tractor and supported on the park supports such that the wings are kept when parking or parking the front loader in an upright arrival or Abkoppelwolf, so that a disconnection or coupling of the front loader by releasing (or closing) the front loader lock and then allowing (or prior) easy maneuvering of the tractor.
- the parking stand device disclosed here comprises a parking support which is pivotally mounted on the rocker of a front loader and pivotable from an operating position (in which the front loader is coupled to the tractor) into a parking position (in which the front loader can be uncoupled and parked or parked).
- An additional locking strut extends between the rocker and Park Formula and is at one end pivotally guided on the rocker and the other end displaceable on the parking support.
- the arresting strut is further connected to a detent bar that extends along the park prop and locks when the park prop moves against a stop to reach the park position.
- Such a parking stand device is for a presettable, but fixed angular position the park support is designed for the swing arm of the front loader, which means that the final parking position varies depending on the pre-setting depending on the coupled to the front loader tool or even in the case of unevenness of the ground. This may cause the front loader to decelerate into the parked position set by the default and set by the tool and the ground condition after disconnecting the front loader, and the interfaces on the front loader mast and the vehicle frame may diverge in height when re-coupled, which leads to considerable maneuvering when coupling the front loader.
- the above-mentioned form of parking stand device designed as complex and with a high variety of parts.
- FIG. 1 389 656 A1 Another parking stand device is in EP 1 389 656 A1 disclosed.
- a park support is proposed with a extending between a front loader rocker and Park space Arret disciplinessstrebe, the park support are provided with a detent tooth arrangement and the Arret réellessrebe with complementary locking teeth at the free end.
- the latching teeth provided on the locking strut can be placed on a locking cylinder at different locations on the latching tooth arrangement and brought into engagement therewith.
- an optimal angular position of the parking support to the front loader swing set and the present conditions with respect to tools and bumps are taken into account so that the front loader dwells after Abkoppelvorgang in the same parking position, so that the interface on the front loader mast when re-docking for uncoupling in Has substantially unchanged height position.
- a disadvantage here has the effect that the ratchet tooth arrangement and the ratchet teeth in interaction with each other only in an optimal locking position completely, ie the entire area, mesh.
- the locking tooth arrangement and the locking teeth engage only partially or even selectively, resulting in a high and thus unfavorable surface pressure on the ratchet teeth, which can lead to damage on the one hand, or on the other hand requires a correspondingly high-strength and robust material training.
- a front-end loader of the type mentioned in the introduction is designed in such a way that the locking elements arranged at the free end of the arresting strut are formed on a locking slide hinged to the locking strut.
- the arrangement of the locking elements on a pivotable locking slide makes it possible that the locking elements can be optimally aligned to each other independently of an angular position of the parking support to the front loader rocker by a corresponding pivoting movement of the locking slide and thereby minimizing the stress on the locking elements, in particular a minimized surface pressure and minimized voltage spikes, for each locking position, is made possible on the locking elements.
- the park support is designed as a U-shaped profiled rail, wherein the latching elements arranged on the parking support are located on the inside of the rail in the region of the web and wherein the legs of the rail are each formed on the inside with a guide rail through which the locking carriages face on their front loader rocker Side is guided, wherein the locking elements are formed on one of the front loader rocker side facing away from the Arret michsschlittens.
- the guide rail may be formed as a leading edge or as a survey on the inner sides of the legs. It is designed such that the locking slide remains in the rail and is guided within the rail.
- the rail and the Arretsammlungsstrebe are movably held together, so that is displaced upon pivoting of the parking support or the rail of the locking slide within the rail.
- the latching elements formed in the region of the web of the parking support are designed as rows of teeth parallel to each other on the leg sides of the web, the rows of teeth facing the side of the locking carriage facing away from the front loader rocker and the locking carriage being displaceably guided between the guide rails and the rows of teeth.
- the rows of teeth are facing the locking elements on the locking slide, since the latter are located on the side facing away from the front loader rocker.
- the rows of teeth and the guide rails are spaced apart from one another in such a way that the locking slide can be released or raised in the engaged state with its latching elements by the latching elements on the parking support (rail). Thus, a light movement gap can form between the locking elements and the locking slide can be moved along the guideway.
- the locking slide may be formed as a one-piece component or as a multi-part component.
- the locking slide by two parallel mutually arranged flat side parts are formed, which are connected to each other via a transverse strut and pivotally suspended on a extending between the side parts and connected to the free end of the locking strut transverse bolt, wherein the locking elements arranged in each case by a remote from one of the front loader rocker edge of the side parts row of teeth are formed.
- the side parts may be formed by flat sheet metal parts or the like, wherein the side parts are placed on their edge sides facing with their flat sides.
- the cross brace serves for the rigid connection of the two side parts to each other.
- the transverse bolt serves for the pivotable suspension of the locking slide at the free end of the locking strut, wherein corresponding cross-bolt receptacles are formed on both side parts. Due to the pivotable arrangement of the locking slide, it is possible that the toothed row formed on the locking slide can always align parallel to the toothed row formed on the parking support, so that an optimal area coverage between the individual teeth of the rows of teeth is always ensured, so that spikes or excessive Surface pressures on the tooth surfaces are avoided by insufficient coverage of the tooth surfaces.
- a spring-biased latch is formed, which is engageable to lock the parking stand device in the operating position with a formed on the front loader rocker locking device into engagement.
- a simple tab or a projection may be arranged on the front loader rocker, on which or the latch can engage or the bolt can hold by its spring bias, as soon as the parking support has been pivoted into the operating position.
- FIG. 1 a front loader 10 is shown, which can be coupled and actuated for loading work on agricultural vehicles, such as farm tractors.
- the front loader 10 has a front loader rocker 12 which can be coupled to the vehicle via a mast arrangement 14 and a console (not shown) fastened to the vehicle. Between mast assembly 14 and front loader swing arm 12 extends an actuator 16, for example, a hydraulic cylinder, for lifting and lowering the front loader rocker 12. At the free end of the front loader rocker 12 a tool holder 18 is arranged, which with an interchangeable front loader tool, such as a front loader bucket, a bale grab, a Stacking fork, etc. (not shown), can be fitted. Via an actuating linkage 22, which can be controlled via a further actuator 24, the tool holder 18 and thus also a front loader tool relative to the front loader rocker 12 can be pivoted. Another linkage 26 serves for parallel guidance of the tool holder 18 or of a front loader tool when lifting and lowering the front loader rocker 12.
- an actuator 16 for example, a hydraulic cylinder
- the front loader also has a parking stand device 28 arranged on the front loader rocker 12, as described in greater detail in FIGS FIGS. 2 to 7 is shown.
- the parking stand device 28 includes a pivotally mounted on the front loader rocker arm 12 parking support 30 and an end also pivotally hinged to the front loader rocker 12 locking strut 32, which is the other end additionally slidably connected to the park support 30.
- the locking strut 32 is secured to the park support 30 in a locking position (as in FIGS. 1 and 2 shown), which it occupies as soon as the parking support 30 is pivoted into a parking position, as will be described in more detail below.
- the park support 30 In the parking position or locking position, the park support 30 is supported and locked relative to the front loader rocker 12 in a predetermined by the length and the pivot angle of the locking strut 32 position.
- the park support 30 is attached at one end to a pivot pin 34 at a lower portion of the free end of the front loader rocker 12 thereon.
- the locking strut 32 is also attached or hinged above the attachment of the park support 30 at one end with a pivot pin 36 on the front loader rocker 12.
- the park support 30 is formed as a U-shaped profiled rail 37 and has two extending in the direction of the front loader rocker arm 12 and side walls 38, 40 which are connected to each other via a lower web 41 (in the Figures 2 and 3 the front park support 30 shown in the figure is shown with only one side wall for better representation of the parts lying within the rail 37).
- rows of teeth 42, 44 are on the side walls 38, 40 each inside on an area on the web, which serve as park Lench Tooth rows 42, 44 extend from approximately the middle of the park support 30 about in about two-thirds of the length of the mounted on the front loader rocker arm half 12 Park affinity 30.
- the rail 37 also has on the side walls 38, 40 formed guide rails 46, 48 , which are respectively disposed on the inside of an upper portion of the rail 37, wherein the guide rails 46, 48 extend centrally about the length of the parking support 30 in about two-thirds of the entire length of the parking support 30, so that each of the front loader rocker 12 facing half of Guide rails 46, 48, the rows of teeth 42, 44 cover.
- the locking strut 32 is also formed as a U-shaped profiled rail 50 and has two extending in the direction of the front loader rocker 12 side walls 52, 54 which are interconnected via a web 56.
- a locking slide 58 is arranged at the end connected to the front loader rocker 12 opposite end of the locking strut 32.
- the locking slide 58 is formed by two mutually parallel flat side parts 60, 62 or side plates, which are arranged at a distance edgewise to each other in parallel.
- the two side parts 60, 62 form a kind of runners of the Arret michsschlittens 58.
- the side panels 60, 62 are rigidly connected to each other via a cross member 64, wherein the distance between the side members 60, 62 is selected so that the Arret Sammlungsschlitten 58 inwardly between the side walls 38th , 40 of the park support 30 can be moved or moved.
- the side parts 60, 62 are thereby placed with their edges on the underside of the locking elements of the park support, or can be brought into engagement, wherein the lower edges of the side parts 60, 62 each formed with a complementary to the rows of teeth 42, 44 Tooth row 66, 68 are formed.
- the side parts 60, 62 are formed with smooth edges 70, 72.
- the guide rails 46, 48 serve to guide the locking slide 58 along the guide rails 46, 48, when this from an engagement position (in which the rows of teeth 42, 44 of the park support 30 with the rows of teeth 66, 68 of the locking slide 58 engage in one) Movement space 74 formed between the guide rails 46, 48 and the rows of teeth 42, 44 of the parking support 30 is moved.
- the locking slide 58 is pivotally suspended by means of a transverse pin 76 to the locking strut 32 at its opposite end of the front loader rocker arm 12.
- the transverse pin 76 thus connects the locking strut 32 with the locking slide 58, which in turn is guided displaceably in the parking strut 30 and thus connecting locking strut 32 and parking strut 30 movable together.
- the cross pin 76 is substantially centered to the side parts 60, 62 formed therein bearing bores 78, 80 and rotatably connected to the locking strut 32.
- this is able to optimally align in all positions of the park support 30, so that the rows of teeth 42, 44 and 66, 68 are optimally placed on each other or can optimally intermesh, so that even in extreme positions the park strut (steep or flat position of the park support 30), the tooth surfaces of the rows of teeth 42, 44 and 66, 68 can lie over each other over the entire surface and thus optimum force distribution and a minimized surface pressure can be achieved on the locking elements.
- an operating position P1 and a parking position P2 is defined.
- both the park support 30 and the arresting strut 32 are swiveled in until they abut the front loader rocker 12 or are folded in or folded up (see FIG FIG. 3 in which the parking support is in an intermediate position shortly before complete folding, the operating position P1 was thus almost taken).
- the parking stand device 28 is preferably brought into the operating position P1, when the front loader 10 is to be put into operation, that is coupled to a vehicle.
- both the park support 30 and the locking strut 32 are swung out or unfolded.
- the parking stand device 28 is preferably brought into the parking position P2 when the front loader 10 is to be taken out of service, that is to be decoupled from a vehicle and parked or parked. All positions that occupy the parking stand device 28 between the operating position P1 and parking position P2 represent an intermediate position.
- the locking carriage 58 is shown in various positions, wherein the position A exemplarily represents a parking position P2, in which the teeth of the rows of teeth 42, 44 and 66, 68 are completely engaged with each other.
- B shows an intermediate position in which the locking slide 58 can be raised in the intermediate space created between the guide rails 46, 48 and the rows of teeth 42, 44 and moved along the guide rails.
- C describes a stop position, which is outside the normal parking position P2 and in which the locking slide 58 leans against a stop 82. This position is the thinnest parking position that can take the parking stand device 28.
- the locking slide 58 is stored at the free end of the parking support 30. If the parking stand device 28 is now unfolded or is to be moved or swiveled out into a parking position P2, the arresting carriage 58 passes through various positions along the guide rails 46, 48 all the way over the rows of teeth 42, 44. Due to the pitch of the tooth flanks of the rows of teeth 44, 46 and 66, 68 to one another, the locking slide 58 slides over the rows of teeth 44, 46 when the parking support 30 is pivoted out.
- the locking slide 58 is fixed or caught and the parking stand device 28 is locked.
- a release of the parking stand device 28 from the parking position P2 out by coupling and lifting the front loader 10, so that the support force is released and the locking strut 32 manually from the rows of teeth 42, 44 of the parking support 30 can be unlocked by the Arret istsschlitten 58 by gently lifting the locking strut 32 is brought to the guide rails 46, 48 and moved there in the direction of the free end of the parking support 30 or moved.
- the parking stand device 28 can thereby be pivoted into the operating position P1.
- a pendulum foot 86 is provided, which is pivotally mounted by means of a bolt 88 on the park support 30 and provides a Aufstands- or support surface when the parking stand device 28 is pivoted in park position P2.
- a locking device 90 extends between the pendulum foot 86 and the arresting strut 32.
- the locking device 90 comprises a latch 92 received by the side walls 38, 40, which extends tangibly for actuation by the side wall 38 and by a spring 94 which extends between the latch 92 and the bolt 88 is biased towards the free end of the parking support 30.
- the bolt 92 is provided by trained in the side walls 38, 40 slots 96 with a play of movement.
- a detent 98 is provided which is secured in the form of a provided with a latching notch 100 on the front loader rocker 12, such that the latch 92 engages in the operating position P1 due to its spring bias in the latching notch 100 and the parking stand device 28 in the operating position stops, or locks them in the operating position.
- the parking stand device 28 can be unlocked and spent in the park position P2.
Description
Die Erfindung betrifft einen Frontlader für einen Traktor, mit wenigstens einer Frontladerschwinge und einer an der Frontladerschwinge angebrachten Parkständereinrichtung zum Abstellen des Frontladers, wobei die Parkständereinrichtung eine schwenkbar an der Frontladerschwinge befestigte Parkstütze umfasst, die aus einer Betriebsstellung in eine Parkstellung verschwenkbar ist, wobei die Parkständereinrichtung eine einenends verschwenkbar an der Frontladerschwinge befestigte Arretierungsstrebe umfasst und an der Parkstütze und an einem freien Ende der Arretierungsstrebe einander zugeordnete und miteinander in Eingriff bringbare Rastelemente angeordnet sind, durch welche die Parkstütze in mehreren den Frontlader abstützenden Stellungen verrastbar ist.The invention relates to a front loader for a tractor, with at least one front loader rocker and mounted on the front loader swing parking stand device for parking the front loader, wherein the parking stand device comprises a pivotally mounted on the front loader swing parking support, which is pivotable from an operating position to a parking position, wherein the parking stand device a locking strut fixed at one end to the front loader rocker and arranged on the parking support and at a free end of the locking strut associated and engageable locking elements by which the park support is latched in a plurality of positions supporting the front loader.
Der Einsatz von Frontladern zum Bewegen von Material mit einem Traktor ist bekannt. Dazu können Frontlader mittels einer am Traktor vorgesehenen Rahmenkonsole am Traktor angebaut bzw. angekoppelt werden. Der Frontlader verfügt üblicherweise über zwei parallel geführte Schwingen, die sich am Frontende des Traktors erstrecken und mit einem entsprechenden Ladewerkzeug, beispielsweise einer Schaufel, einem Greifer, einer Ladegabel etc. bestückt sind, wobei die Schwingen und das Frontladerwerkzeug üblicherweise durch hydraulische oder elektrische Aktuatoren betätigbar sind. An den Schwingen des Frontladers können Parkständereinrichtungen vorgesehen sein, die eine ausschwenkbare Parkstütze umfassen, welche in eine Parkstellung verbringbar und in dieser arretierbar ist. In der Parkstellung kann der Frontlader von dem Traktor abgekoppelt werden und sich auf den Parkstützen derart abstützen, dass die Schwingen beim Abstellen bzw. Parken des Frontladers in einer aufrechten An- bzw. Abkoppelstellung gehalten werden, so dass ein Ab- bzw. Ankoppeln des Frontladers durch Lösen (bzw. schließen) der Frontladerverriegelung und anschließendes (bzw. vorheriges) einfaches Rangieren des Traktors ermöglicht wird.The use of front loaders for moving material with a tractor is known. For this purpose, front loaders can be mounted or coupled to the tractor by means of a frame console provided on the tractor. The front loader usually has two parallel guided wings, which extend at the front end of the tractor and with a corresponding loading tool, such as a blade, a gripper, a loading fork, etc. are equipped, the rockers and the front loader tool usually actuated by hydraulic or electrical actuators are. On the wings of the front loader parking stand devices may be provided which comprise a swing-out parking support, which can be brought into a parking position and locked in this. In the parking position, the front loader can be disconnected from the tractor and supported on the park supports such that the wings are kept when parking or parking the front loader in an upright arrival or Abkoppelstellung, so that a disconnection or coupling of the front loader by releasing (or closing) the front loader lock and then allowing (or prior) easy maneuvering of the tractor.
Eine derartige Partkständereinrichtung wird in der
Eine weitere Parkständervorrichtung ist in
Another parking stand device is in
Weitere Parkständervorrichtungen sind in
Die Aufgabe wird erfindungsgemäß durch die Lehre des Patentanspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor.Other parking stand devices are in
The object is achieved by the teaching of claim 1. Further advantageous embodiments and modifications of the invention will become apparent from the dependent claims.
Erfindungsgemäß wird ein Frontlader der eingangs genannten Art derart ausgebildet, dass die am freien Ende der Arretierungsstrebe angeordneten Rastelemente auf einem schwenkbar an der Arretierungsstrebe angelenkten Arretierungsschlitten ausgebildet sind. Die Anordnung der Rastelemente auf einem schwenkbaren Arretierungsschlitten ermöglicht es, dass die Rastelemente unabhängig zu einer Winkelstellung der Parkstütze zur Frontladerschwinge durch eine entsprechende Schwenkbewegung des Arretierungsschlittens zueinander optimal ausgerichtet werden können und dadurch eine Minimierung der Beanspruchung der Rastelemente, insbesondere eine minimierte Flächenpressung und minimierte Spannungsspitzen, für eine jede Arretierstellung, an den Rastelementen ermöglicht wird.According to the invention, a front-end loader of the type mentioned in the introduction is designed in such a way that the locking elements arranged at the free end of the arresting strut are formed on a locking slide hinged to the locking strut. The arrangement of the locking elements on a pivotable locking slide makes it possible that the locking elements can be optimally aligned to each other independently of an angular position of the parking support to the front loader rocker by a corresponding pivoting movement of the locking slide and thereby minimizing the stress on the locking elements, in particular a minimized surface pressure and minimized voltage spikes, for each locking position, is made possible on the locking elements.
Die Parkstütze ist als U-förmig profilierte Schiene ausgebildet, wobei sich die an der Parkstütze angeordneten Rastelemente im Bereich des Steges innenseitig der Schiene befinden und wobei die Schenkel der Schiene innenseitig mit jeweils einer Führungsschiene ausgebildet sind, durch welche der Arretierungsschlitten auf seiner der Frontladerschwinge zugewandten Seite geführt wird, wobei die Rastelemente auf eine der Frontladerschwinge abgewandten Seite des Arretierungsschlittens ausgebildet sind. Die Führungsschiene kann als Führungskante oder als Erhebung an den Innenseiten der Schenkel ausgebildet sein. Sie ist derart ausgebildet, dass der Arretierungsschlitten in der Schiene verbleibt und innerhalb der Schiene geführt wird. Die Schiene und die Arretierungsstrebe werden beweglich zusammengehalten, so dass beim Verschwenken der Parkstütze bzw. der Schiene der Arretierungsschlitten innerhalb der Schiene verschoben wird.The park support is designed as a U-shaped profiled rail, wherein the latching elements arranged on the parking support are located on the inside of the rail in the region of the web and wherein the legs of the rail are each formed on the inside with a guide rail through which the locking carriages face on their front loader rocker Side is guided, wherein the locking elements are formed on one of the front loader rocker side facing away from the Arretierungsschlittens. The guide rail may be formed as a leading edge or as a survey on the inner sides of the legs. It is designed such that the locking slide remains in the rail and is guided within the rail. The rail and the Arretierungsstrebe are movably held together, so that is displaced upon pivoting of the parking support or the rail of the locking slide within the rail.
Die im Bereich des Steges der Parkstütze ausgebildeten Rastelemente sind als an den Schenkelseiten des Stegs parallel gegenüberliegende Zahnreihen ausgebildet, wobei die Zahnreihen der der Frontladerschwinge abgewandten Seite des Arretierungsschlittens zugewandt sind und der Arretierungsschlitten zwischen den Führungsschienen und den Zahnreihen verschiebbar geführt wird. Mit anderen Worten sind die Zahnreihen den Rastelementen am Arretierungsschlitten zugewandt, da sich letztere auf der der Frontladerschwinge abgewandten Seite befinden. Die Zahnreihen und die Führungsschienen sind derart zueinander beabstandet, dass der Arretierungsschlitten im Eingriffzustand mit seinen Rastelementen von den Rastelementen an der Parkstütze (Schiene) gelöst bzw. angehoben werden kann. So kann sich zwischen den Rastelementen ein lichter Bewegungsspalt ausbilden und der Arretierungsschlitten entlang der Führungsbahn verschoben werden.The latching elements formed in the region of the web of the parking support are designed as rows of teeth parallel to each other on the leg sides of the web, the rows of teeth facing the side of the locking carriage facing away from the front loader rocker and the locking carriage being displaceably guided between the guide rails and the rows of teeth. In other words, the rows of teeth are facing the locking elements on the locking slide, since the latter are located on the side facing away from the front loader rocker. The rows of teeth and the guide rails are spaced apart from one another in such a way that the locking slide can be released or raised in the engaged state with its latching elements by the latching elements on the parking support (rail). Thus, a light movement gap can form between the locking elements and the locking slide can be moved along the guideway.
Der Arretierungsschlitten kann als einteiliges Bauteil oder auch als mehrteiliges Bauteil ausgebildet sein. Beispielsweise kann der Arretierungsschlitten durch zwei parallel zueinander angeordnete flache Seitenteile ausgebildet sein, die über eine Querstrebe miteinander verbunden und an einem sich zwischen den Seitenteilen erstreckenden und mit dem freien Ende der Arretierungsstrebe verbundenen Querbolzen schwenkbar aufgehängt sind, wobei die Rastelemente jeweils durch eine an einer der Frontladerschwinge abgewandten Kante der Seitenteile angeordneten Zahnreihe ausgebildet sind. Die Seitenteile können durch flache Blechteile oder dergleichen ausgebildet sein, wobei die Seitenteile sich auf ihre Kantenseiten gestellt mit ihren flächigen Seiten gegenüberstehen. Die Querstrebe dient dabei zur steifen Verbindung der beiden Seitenteile zueinander. Der Querbolzen dient zur schwenkbaren Aufhängung des Arretierungsschlittens am freien Ende der Arretierungsstrebe, wobei an beiden Seitenteilen entsprechende Querbolzenaufnahmen ausgebildet sind. Durch die schwenkbare Anordnung des Arretierungsschlittens ist es möglich, dass sich die an dem Arretierungsschlitten ausgebildeten Zahnreihe stets parallel zu der an der Parkstütze ausgebildete Zahnreihe ausrichten kann, so dass stets eine optimale Flächendeckung zwischen den einzelnen Zähnen der Zahnreihen gewährleistet ist, so dass Spannungsspitzen oder übermäßige Flächenpressungen an den Zahnflächen durch mangelnde Deckung der Zahnflächen vermieden werden.The locking slide may be formed as a one-piece component or as a multi-part component. For example, the locking slide by two parallel mutually arranged flat side parts are formed, which are connected to each other via a transverse strut and pivotally suspended on a extending between the side parts and connected to the free end of the locking strut transverse bolt, wherein the locking elements arranged in each case by a remote from one of the front loader rocker edge of the side parts row of teeth are formed. The side parts may be formed by flat sheet metal parts or the like, wherein the side parts are placed on their edge sides facing with their flat sides. The cross brace serves for the rigid connection of the two side parts to each other. The transverse bolt serves for the pivotable suspension of the locking slide at the free end of the locking strut, wherein corresponding cross-bolt receptacles are formed on both side parts. Due to the pivotable arrangement of the locking slide, it is possible that the toothed row formed on the locking slide can always align parallel to the toothed row formed on the parking support, so that an optimal area coverage between the individual teeth of the rows of teeth is always ensured, so that spikes or excessive Surface pressures on the tooth surfaces are avoided by insufficient coverage of the tooth surfaces.
An der Parkstütze ist ein federvorgespannter Riegel ausgebildet ist, welcher zur Verriegelung der Parkständereinrichtung in der Betriebsstellung mit einer an der Frontladerschwinge ausgebildeten Rasteneinrichtung in Eingriff bringbar ist. Dazu kann an der Frontladerschwinge eine einfache Lasche oder ein Vorsprung angeordnet sein, an der bzw. dem der Riegel einrasten kann bzw. sich der Riegel durch seine Federvorspannung halten kann, sobald die Parkstütze in die Betriebsstellung verschwenkt wurde.At the park support a spring-biased latch is formed, which is engageable to lock the parking stand device in the operating position with a formed on the front loader rocker locking device into engagement. For this purpose, a simple tab or a projection may be arranged on the front loader rocker, on which or the latch can engage or the bolt can hold by its spring bias, as soon as the parking support has been pivoted into the operating position.
Anhand der Zeichnung, die ein Ausführungsbeispiel der Erfindung zeigt, werden nachfolgend die Erfindung sowie weitere Vorteile und vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung näher beschrieben und erläutert.Reference to the drawing, which shows an embodiment of the invention, the invention and further advantages and advantageous developments and refinements of the invention are described and explained in more detail below.
Es zeigt:
- Fig. 1
- eine schematische perspektivische Seitenansicht eines Frontladers mit Parkständereinrichtung,
- Fig. 2
- eine schematische perspektivische Seitenansicht eines Bereichs der Parkständereinrichtung aus
Figur 1 mit der Parkständereinrichtung in einer Parkstellung, - Fig. 3
- eine schematische perspektivische Seitenansicht eines Bereichs der Parkständereinrichtung aus
Figur 1 mit der Parkständereinrichtung in einer nahezu Betriebsstellung, - Fig. 4
- eine schematische perspektivische Seitenansicht einer Parkstütze gemäß
Figuren 1 bis 3 , - Fig. 5
- eine schematische perspektivische Seitenansicht einer Arretierungsstrebe gemäß
Figuren 1 bis 3 , - Fig. 6
- eine schematische perspektivische Seitenansicht eines Arretierungsschlittens gemäß
Figuren 1 bis 3 und - Fig. 7
- eine schematische Seitenansicht der Parkstütze mit Arretierungsschlitten in drei exemplarischen Stellungen.
- Fig. 1
- a schematic perspective side view of a front loader with parking stand device,
- Fig. 2
- a schematic perspective side view of a portion of the parking stand device
FIG. 1 with the parking stand device in a parking position, - Fig. 3
- a schematic perspective side view of a portion of the parking stand device
FIG. 1 with the parking stand device in an almost operating position, - Fig. 4
- a schematic perspective side view of a parking support according to
FIGS. 1 to 3 . - Fig. 5
- a schematic perspective side view of a locking strut according to
FIGS. 1 to 3 . - Fig. 6
- a schematic perspective side view of a locking slide according to
FIGS. 1 to 3 and - Fig. 7
- a schematic side view of the park support with locking slide in three exemplary positions.
In
Der Frontlader 10 weist eine Frontladerschwinge 12 auf, welche über ein Mastanordnung 14 und eine am Fahrzeug befestigte Konsole (nicht gezeigt) an das Fahrzeug koppelbar ist. Zwischen Mastanordnung 14 und Frontladerschwinge 12 erstreckt sich ein Aktuator 16, beispielsweise ein Hydraulikzylinder, zum Heben und Senken der Frontladerschwinge 12. Am freien Ende der Frontladerschwinge 12 ist eine Werkzeugaufnahme 18 angeordnet, welche mit einem auswechselbaren Frontladerwerkzeug, beispielsweise einer Frontladerschaufel, einem Ballengreifer, einer Stapelgabel etc. (nicht gezeigt), bestückbar ist. Über ein Betätigungsgestänge 22, welches über einen weiteren Aktuator 24 ansteuerbar ist, kann die Werkzeugaufnahme 18 und damit auch ein Frontladerwerkzeug gegenüber der Frontladerschwinge 12 verschwenkt werden. Ein weiteres Gestänge 26 dient zur Parallelführung der Werkzeugaufnahme 18 bzw. eines Frontladerwerkzeugs beim Heben und Senken der Frontladerschwinge 12.The
Der Frontlader weist ferner eine an der Frontladerschwinge 12 angeordnete Parkständereinrichtung 28 auf, wie sie im weiteren Detail in den
Die Parkständereinrichtung 28 umfasst eine schwenkbar an der Frontladerschwinge 12 angelenkte Parkstütze 30 und eine einenends ebenfalls schwenkbar an der Frontladerschwinge 12 angelenkte Arretierungsstrebe 32, welche anderenends zusätzlich mit der Parkstütze 30 verschiebbar verbunden ist. Die Arretierungsstrebe 32 ist an der Parkstütze 30 in eine Arretierungsposition (wie in
Die Parkstütze 30 ist an einem Ende mit einem Schwenkbolzen 34 an einem unteren Bereich des freien Endes der Frontladerschwinge 12 an dieser befestigt. Die Arretierungsstrebe 32 ist oberhalb der Befestigung der Parkstütze 30 an einem Ende ebenfalls mit einem Schwenkbolzen 36 an der Frontladerschwinge 12 befestigt bzw. angelenkt.The
Die Parkstütze 30 ist als U-förmig profilierte Schiene 37 ausgebildet und weist zwei sich in Richtung der Frontladerschwinge 12 erstreckende Schenkel bzw. Seitenwände 38, 40 auf, die über einen unterseitigen Steg 41 miteinander verbunden sind (in den
Die Arretierungsstrebe 32 ist ebenfalls als U-förmig profilierte Schiene 50 ausgebildet und weist zwei sich in Richtung der Frontladerschwinge 12 erstreckende Seitenwände 52, 54 auf, die über einen Steg 56 miteinander verbunden sind.The locking
An dem mit der Frontladerschwinge 12 verbundenem Ende gegenüberliegenden Ende der Arretierungsstrebe 32 ist ein Arretierungsschlitten 58 angeordnet. Der Arretierungsschlitten 58 ist durch zwei parallel zueinander angeordnete flache Seitenteile 60, 62 oder Seitenbleche ausgebildet, die in einem Abstand hochkant zueinander parallel angeordnet sind. Die beiden Seitenteile 60, 62 bilden eine Art Kufen des Arretierungsschlittens 58. Die Seitenteile 60, 62 sind über eine Querstrebe 64 starr miteinander verbunden, wobei der Abstand zwischen den Seitenteilen 60, 62 so gewählt ist, dass der Arretierungsschlitten 58 innenliegend zwischen die Seitenwände 38, 40 der Parkstütze 30 bewegt bzw. verschoben werden kann. Die Seitenteile 60, 62 sind dabei mit ihren Kanten unterseitig auf den Rastelementen der Parkstütze aufgelegt, bzw. mit diesen in Eingriff bringbar, wobei die Unterkanten der Seitenteile 60, 62 jeweils mit einer komplementär zu den Zahnreihen 42, 44 ausgebildete Zahnreihe 66, 68 ausgebildet sind. Oberseitig sind die Seitenteile 60, 62 mit glatten Kanten 70, 72 ausgebildet. Die Führungsschienen 46, 48 dienen dazu, den Arretierungsschlitten 58 entlang der Führungsschienen 46, 48 zu führen, wenn dieser aus einer Eingriffsstellung heraus (in der die Zahnreihen 42, 44 der Parkstütze 30 mit den Zahnreihen 66, 68 des Arretierungsschlittens 58 ineinandergreifen) in einem sich zwischen den Führungsschienen 46, 48 und den Zahnreihen 42, 44 der Parkstütze 30 ausgebildeten Bewegungsraum 74 verschoben wird.At the end connected to the
Der Arretierungsschlitten 58 ist mittels eines Querbolzens 76 an die Arretierungsstrebe 32 an ihrem der Frontladerschwinge 12 gegenüberliegenden Ende schwenkbar aufgehängt. Der Querbolzen 76 verbindet somit die Arretierungsstrebe 32 mit dem Arretierungsschlitten 58, welcher seinerseits in der Parkstrebe 30 verschiebbar geführt wird und damit Arretierungsstrebe 32 und Parkstrebe 30 miteinander beweglich verbindet. Der Querbolzen 76 ist im Wesentlichen mittig zu den Seitenteilen 60, 62 in darin ausgebildeten Lagerbohrungen 78, 80 eingefasst und mit der Arretierungsstrebe 32 drehbar verbunden. Durch eine ermöglichte Schwenkbewegung des Arretierungsschlittens 58, ist dieser in der Lage sich in allen Stellungen der Parkstütze 30 optimal auszurichten, so dass die Zahnreihen 42, 44 und 66, 68 optimal aufeinander liegen bzw. optimal ineinander eingreifen können, so dass selbst bei extremen Positionen der Parkstrebe (steile oder flache Stellung der Parkstütze 30) die Zahnflächen der Zahnreihen 42, 44 und 66, 68 vollflächig aufeinander liegen können und damit eine optimale Kraftverteilung bzw. eine minimierte Flächenpressung an den Rastelementen erzielt werden kann.The locking
Für die Parkständereinrichtung 28 wird eine Betriebsstellung P1 und eine Parkstellung P2 definiert. In der Betriebsstellung P1 sind sowohl die Parkstütze 30 als auch die Arretierungsstrebe 32 bis zur Anlage an die Frontladerschwinge 12 eingeschwenkt bzw. eingeklappt oder hochgeklappt (siehe
In
Ausgehend von der Betriebsstellung P1 liegt der Arretierungsschlitten 58 am freien Ende der Parkstütze 30 verwahrt. Wird die Parkständereinrichtung 28 nun ausgeklappt bzw. soll in eine Parkstellung P2 verbracht bzw. ausgeschwenkt werden, durchfährt der Arretierungsschlitten 58 verschiedene Stellungen entlang der Führungsschienen 46, 48 bis hin über die Zahnreihen 42, 44. Aufgrund der Steigung der Zahnflanken der Zahnreihen 44, 46 und 66, 68 zueinander, gleitet der Arretierungsschlitten 58 beim Ausschwenken der Parkstütze 30 über die Zahnreihen 44, 46 hinweg. Sobald die Parkstütze 30 vollständig ausgeschwenkt wurde und auf einen Boden 83 oder Untergrund mit einem entsprechenden Parkstellungswinkel 84 anschlägt, finden die Zahnreihen 66, 68 des Arretierungsschlittens 58 eine diesem Parkstellungswinkel 84 der Parkstütze 30 zugehörige Stellung auf den Zahnreihen 44, 46 der Parkstütze 30, wobei gilt, dass je mehr Zähne ausgebildet sind umso feiner die Justierung ist. Wird nun der Frontlader 10 abgekoppelt, so stellt sich ein umgekehrter Kraftfluss an der Frontladerschwinge 12 ein, da diese sich nun mit einer Stützkraft auf der Parkstütze 30 abstützt und damit die Arretierungsstrebe 32 mit dem Arretierungsschlitten 58 auf die Parkstütze 30 bzw. auf die daran ausgebildeten Zahnreihen 42, 44 drückt. Sogleich verrasten die Zahnreihen 66, 68 des Arretierungsschlittens 58 mit den Zahnreihen 42, 44 der Parkstütze 30 und, aufgrund der feingezahnten Zahnreihen 44, 46 und 66, 68, ohne Nachkippen des Frontladers 10. Dabei ist aufgrund der schwenkbaren Anordnung des Arretierungsschlittens 58 zugleich gewährleistet, dass unabhängig vom sich einstellenden Parkstellungswinkel 84 die Zahnreihen vollflächig und damit belastungsoptimal ineinander eingreifen können. Die Schwenkbewegung der Parkstütze 30 kann dabei durch eine Bedienperson ausgeführt oder auch schwerkraftbedingt durch das Eigengewicht der Parkstütze erfolgen.Starting from the operating position P1, the locking
Solange eine Stützkraft auf die Arretierungsstrebe 32 wirkt, ist der Arretierungsschlitten 58 festgelegt bzw. gefangenen und die Parkständereinrichtung 28 arretiert. Ein Lösen der Parkständereinrichtung 28 aus der Parkstellung P2 heraus erfolgt durch Ankoppeln und Anheben des Frontladers 10, so dass die Stützkraft aufgehoben wird und die Arretierungsstrebe 32 manuell von den Zahnreihen 42, 44 der Parkstütze 30 entriegelt werden kann, indem der Arretierungsschlitten 58 durch leichtes Anheben der Arretierungsstrebe 32 an die Führungsschienen 46, 48 gebracht und dort in Richtung des freien Endes der Parkstütze 30 bewegt bzw. verschoben wird. Die Parkständereinrichtung 28 kann dadurch in die Betriebsstellung P1 verschwenkt werden.As long as a supporting force acts on the locking
Am freien Ende der Parkstütze 30 ist ein Pendelfuß 86 vorgesehen, der mittels eines Bolzens 88 pendelnd verschwenkbar an der Parkstütze 30 angebracht ist und eine Aufstands- bzw. Stützfläche bereitstellt, wenn die Parkständereinrichtung 28 in Parkstellung P2 verschwenkt wird.At the free end of the park support 30 a
Ferner erstreckt sich zwischen Pendelfuß 86 und Arretierungsstrebe 32 eine Riegeleinrichtung 90. Die Riegeleinrichtung 90 umfasst einen von den Seitenwänden 38, 40 aufgenommenen Riegel 92, der sich zwecks Betätigung durch die Seitenwand 38 greifbar erstreckt und durch eine Feder 94, die sich zwischen dem Riegel 92 und dem Bolzen 88 erstreckt, in Richtung des freien Endes der Parkstütze 30 vorgespannt ist. Der Riegel 92 ist durch in den Seitenwänden 38, 40 ausgebildete Langlöcher 96 mit einem Bewegungsspiel versehen. Ferner ist eine Rasteneinrichtung 98 vorgesehen, die in Form eines mit einer Einrastkerbe 100 versehenen Bleches an der Frontladerschwinge 12 befestigt ist, derart, dass der Riegel 92 in der Betriebsstellung P1 bedingt durch seine Federvorspannung in die Einrastkerbe 100 einrastet und die Parkständereinrichtung 28 in der Betriebsstellung hält, bzw. diese in der Betriebsstellung verriegelt. Durch einfaches Betätigen des Riegels 92 innerhalb des Langlochs 96 entgegen seiner Federvorspannung (Bewegen in Längsrichtung zur Parkstütze) kann die Parkständereinrichtung 28 entriegelt und in die Parkstellung P2 verbracht werden.Furthermore, a
Claims (5)
- Front loader (10) for a tractor, comprising at least one front loader rocker (12) and a parking stand device (28) mounted on the front loader rocker (12) for setting down the front loader (10), wherein the parking stand device (28) comprises a parking support (30), which is swivelably attached to the front loader rocker (12) and can be pivoted out of an operating position (P1) and into a parked position (P2), wherein the parking stand device (28) comprises a locking brace (32), which is swivelably attached at one end to the front loader rocker (12), and detent elements, which are assigned to one another and can be brought into engagement with one another, are disposed on the parking brace (30) and on a free end of the locking brace (32), by means of which the parking brace (30) can be snapped into multiple positions supporting the front loader, characterized in that the detent elements formed on a free end of the locking brace (32) are formed on a locking carriage (58), which is swivelably hinged to the locking brace (32).
- Front loader according to Claim 1, characterized in that the parking support is designed as a rail (37) having a U-shaped profile, wherein detent elements disposed on the parking support (30) are located in the area of the web (41) on the inside of the rail (37) and wherein a guide rail (46) is formed on the inside of each of the legs (38, 40) of the rail (37), by means of which the locking carriage (58) is guided on its side facing the front loader rocker (12), wherein the detent elements are formed on a side of the locking carriage (58) facing away from the front loader rocker (12).
- Front loader (10) according to Claim 2, characterized in that the detent elements formed in the area of the web (41) of the parking support (30) are designed as rows of teeth (42, 44) disposed opposite one another in parallel at the leg sides of the web (41), wherein the rows of teeth (42, 44) face the side of the locking carriage (58) facing away from the front loader rocker (12) and the locking carriage (58) is displaceably guided between the guide rails (46, 48) and the rows of teeth (42, 44).
- Front loader (10) according to one of the preceding claims, characterized in that the locking carriage (58) is formed by two flat side parts (60, 62), which are disposed parallel to one another, are rigidly connected to one another by a transverse brace (64), and are swivelably suspended on a transverse pin (76), which extends between the side parts (60, 62) and is connected to the free end of the locking brace (32), wherein the detent elements are each formed by a row of teeth (66, 68) disposed on an edge of the side parts (60, 62) facing away from the front loader rocker (12).
- Front loader (10) according to one of the preceding claims, characterized in that a spring-preloaded locking bar (92) is formed on the parking support (30), which can be brought into engagement with a snap-in device (98) formed on the front loader rocker (12) in order to lock the parking stand device (28) in the operating position (P1).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015218524.9A DE102015218524A1 (en) | 2015-09-25 | 2015-09-25 | Front loaders |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3159452A1 EP3159452A1 (en) | 2017-04-26 |
EP3159452B1 true EP3159452B1 (en) | 2018-09-12 |
Family
ID=56926107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16188770.8A Active EP3159452B1 (en) | 2015-09-25 | 2016-09-14 | Front loader |
Country Status (4)
Country | Link |
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US (1) | US10508407B2 (en) |
EP (1) | EP3159452B1 (en) |
BR (1) | BR102016019659A2 (en) |
DE (1) | DE102015218524A1 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP6942669B2 (en) * | 2018-04-19 | 2021-09-29 | 株式会社クボタ | Front loader stand, front loader and work vehicle |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT414348B (en) | 2001-09-14 | 2015-12-15 | Pühringer Josef Mag Ing | LOADER |
AT412659B (en) | 2002-08-13 | 2005-05-25 | Hauer Franz | DEVICE FOR SUPPORTING A TRACKING VEHICLE, IN PARTICULAR A TRACTOR, COUPLING SWINGARM FOR A WORKING DEVICE |
DE102005053041A1 (en) | 2005-11-04 | 2007-05-10 | Wilhelm Stoll Maschinenfabrik Gmbh | Detachable front loader for coupling working tool to machine e.g. tractor, has adjusting cylinder for folding detachable column, which can be tilted at end of cylinder at front loader rocker |
EP2092126A1 (en) | 2006-12-13 | 2009-08-26 | Challenge Implements Holdings Pty Limited | Parking stand |
DE102010030680A1 (en) | 2010-06-29 | 2011-12-29 | Deere & Company | Front loaders |
-
2015
- 2015-09-25 DE DE102015218524.9A patent/DE102015218524A1/en not_active Withdrawn
-
2016
- 2016-07-28 US US15/222,111 patent/US10508407B2/en active Active
- 2016-08-25 BR BR102016019659A patent/BR102016019659A2/en not_active Application Discontinuation
- 2016-09-14 EP EP16188770.8A patent/EP3159452B1/en active Active
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None * |
Also Published As
Publication number | Publication date |
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BR102016019659A2 (en) | 2017-04-04 |
EP3159452A1 (en) | 2017-04-26 |
US20170089028A1 (en) | 2017-03-30 |
US10508407B2 (en) | 2019-12-17 |
DE102015218524A1 (en) | 2017-03-30 |
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