EP1449806A1 - Boom for a loader vehicle - Google Patents

Abstract

Extension arm (14) for a loading vehicle, preferably a telescopic loader (10), comprises a support arrangement (16) having one end pivotably fixed on a frame (12) of the loading vehicle and a free end with a fixing flange (22), and a front part (18) receiving a tool and having a counter-flange (24) fixed to the first fixing flange. Preferred Features: The front part contains at least one cast part.

Description

The invention relates to a boom for a loader vehicle, preferably a telehandler.

Boom for loader vehicles, in particular for telescopic loaders are available in different versions on the market. In the Typically, a boom includes a beam assembly that consists of a outer carrier and one or more inner carriers, the inner carrier or carriers inside the outer Carrier stored or guided telescopically. Over a Actuator can telescope the individual parts extended or retracted. One end of the boom is usually rotatably or pivotally attached to the vehicle, which other end of the boom contains a front piece, which a Tool, for example a transport fork or a gripper receives. A further hydraulic device can be used Boom raised to perform loader work or be lowered. In those known in the prior art Versions is the one intended to hold the workpiece Front piece of the boom is firm and inseparable from the outermost extendable or with the last carrier of the carrier arrangement connected. Usually it is about Welded constructions in which the front piece and the am extreme extendable beams as a one-piece welded construction is trained.

EP 623 092 B1 describes a load handling device discloses a plurality of telescopically mounted sections Containing telescopic boom, the sections Represent carriers that have a hydraulic system and a Chain drive can be extended or retracted. The most extreme extendable (innermost) section has Front piece for receiving a charger fork, the Front piece fixed and inseparable with the most extendable one Section is connected.

US 3,985,248 discloses a telescopic boom assembly which an outer attached to a frame of a loader vehicle Has carrier, inside of which an inner carrier is telescopically mounted and relative to the outer carrier is movable. At one end of the inner beam is one Loader attached hydraulically alignable, the Fastening device for the charger fork as part of the interior Carrier is formed or inseparable from the inner carrier connected is.

As the state of the art shows, the are to accommodate the Tool used fastening or front pieces with the am extreme extendable (inner) carrier combined. The combined design makes it difficult to manufacture bearings and / or Connection points on the carrier as well as the installation of hydraulic and mechanical components. Furthermore, due to the combined design, the handling, the transport, the Paintwork and the final assembly of the carrier difficult, which production costs increase. In addition, by combined design an unchangeable maximum working height predefined for the boom and a variable design of the Cantilever in function and work area not possible.

The object underlying the invention is seen in a boom for a loader vehicle of the type mentioned indicate by which the aforementioned problems have been overcome become. In particular, the boom should be designed such that both manufacturing steps, handling, transportation and Final assembly can be simplified. Furthermore, the boom in length beyond its specified work area can be changed or opened or closed inexpensively with simple means be disarmable so that a user can adjust the boom accordingly can adapt to his needs variably.

The object is achieved by the teaching of Claim 1 solved. Further advantageous configurations and further developments of the invention result from the subclaims out.

According to the invention contains a boom of the type mentioned a support assembly which is pivotable at one end to a The frame of the loader vehicle is attached and at its free Contains a mounting flange at the end. Furthermore contains the boom is a front piece containing a counter flange, the counter flange to the first mounting flange can be fastened and the front piece for holding a tool serves. The boom thus represents a multi-part or modular Design in which the front piece has a flange connection is connected to the carrier arrangement, which is opposite one combined one-piece carrier front piece component into smaller ones Single components leads and both carrier arrangement as well Front piece can be manufactured and transported independently of one another, are manageable and can be assembled. This allows the entire Production of the boom improved as well as cheaper and be made more variable. The independent one Allow manufacture of the carrier assembly and the front piece greater flexibility in manufacturing where Finishing and in the construction of the components. So can for example also different front pieces are manufactured, each in function and training are a special tool and none Represent compromise solution. Furthermore, they are versatile Manufacturing methods possible, such. B. also the use and / or the combination of welded, cast or even forged components. The entire product range one Boom or a loader vehicle can be designed in many ways so that differently trained Beam arrangements with different cross sections and Working lengths without significantly increased production costs can be offered.

In a particularly preferred embodiment of the invention the carrier assembly includes a first carrier, one of which End is the first end and the second end is the Front piece is attachable. This embodiment of the Carrier arrangement represents an inexpensive basic version of a Telescopic loader that is equivalent to a simple wheel loader. The advantage over a conventional wheel loader is however, in that on the one hand different front pieces and on the other other differently designed carrier arrangements with different cross sections and working lengths without significantly increased production costs can be offered.

In a further preferred embodiment of the invention the carrier assembly includes a first and at least one second carrier, the at least second carrier in the first carrier is guided telescopically and the front piece the free end of the at least second carrier can be fastened. Through the second carrier, which is telescopic in the first Carrier is guided is a variable working length of the Given boom, the boom on the basic version with builds only one carrier. The free end of the second beam is provided with a mounting flange to which the Front piece is attached. This embodiment of the invention represents a telehandler, which also all mentioned Has advantages of the basic version. In addition, is by the telescopic arrangement of the two carriers is variable Working length realizable, as it is for a telehandler is common. In contrast, however, the advantage is offered that to dismantle the telehandler by simple conversion, for example to save weight or increase transport or to achieve loading loads. In addition, the can be telescoped guided beams separated from the front piece and from the first beam be removed or removed and the front piece on a first carrier provided flange can be reinstalled. By removing the inside led carrier that becomes Overall boom weight reduced. Through the "saved" Weight can then be calculated with the total weight heavier loads can be carried by the first carrier. at The presence of several telescoping ones or stored carriers, for example at a Carrier arrangement with a total of three carriers, of which the second in the first and third in the second carrier telescopically stored or guided, can on similar Way a weight reduction or disarmament due other requirements can be obtained. First on the third Carrier-attached front piece is there from the mounting flange separately and can either on the first or on the second carrier on an existing mounting flange (after the third carrier and possibly also the second carrier have been removed). In the same way also upgrading a wheel loader or a telescopic loader conceivable. This way they are versatile Combination options are given that make it possible through simple conversions better match the boom of the vehicle Adapt requirements. In carrier arrangements in which more as three carriers are included, can be done in an analogous manner be moved.

In a further particularly preferred embodiment of the Invention, the carrier assembly includes at least one Extension beam with a second at one end Counter flange and a second at its other end Includes mounting flange and between the support assembly and Front piece is attachable, the front piece on the second mounting flange is attachable. This modular Structure of the boom opens up to the user in addition to the Advantages described above further advantageous Possibilities of adaptation to the work requirements for the Loader vehicle or for the boom. So both telescopic beam assembly of a telehandler as well the carrier arrangement of the basic version or the carrier arrangement of a simple wheel loader in their working length can be varied. Enough for certain applications existing boom working height, so it can be extended by such an extension beam. The extension beam is between the front piece and Carrier arrangement set. The extension beam points the corresponding flange dimensions of the mounting flange and of the counter flange, which also supports or the front piece of the boom. This is of particular importance modular structure if, for example, a simple one Wheel loader is in place and only a slight extension to it Adaptation to the required working height is missing. By means of a Extension beam with which the carrier arrangement extends can be used by a user on his already existing one Access wheel loaders and this in a relatively simple way and upgrade inexpensively. So that for the user complex investments can be avoided. The same applies also for existing telescopic loaders that are one Extension beams can be expanded or upgraded. The extension beams can be of several sizes or Lengths are available, so several Expansion options are available. Furthermore, you can due to the modular design also several extension beams flanged together to further increase the working height increase. In this way, a manufacturer can extensive and versatile product range for Offer booms at low cost.

A particularly preferred embodiment of the invention provides proposes that the front piece contains at least one casting. Of The front piece can also essentially be completely formed as a cast part. Training the Front piece or parts thereof as a cast part enables one flexible design and thus an application-specific adaptation to the tool. In particular, for larger quantities shorter production times compared to a welded construction achieved and operated a lower cost. By appropriate material selection and casting design, e.g. B. Reinforcing ribs or cast struts can strength values similar to those of welded steel structures. Furthermore, by Castings processing steps for fits, Pin bearings, brackets and mounting points saved become.

In a further preferred embodiment of the invention the carriers contained in the carrier arrangement as round, Box or polygonal profile. It is about to support profiles that are essentially closed Have a mantle surface and a high one because of their training Have moment of inertia. Such support profiles or Steel profiles can be welded or drawn or shaped hollow profiles that are in different Cross-sectional sizes can be produced so that they are telescopic are feasible.

In a further preferred embodiment of the invention extend the flanges contained in the boom radially outwards and / or towards the longitudinal axis of the carrier Inside. A flange extending radially inwards can at the same time as a storage point for the telescopic guided carrier serve. For an advantageous assembly or Disassembly, the flanges extend radially outwards, which gives easy access to the flange connection is. Furthermore, this arrangement offers a smaller one Cross section of the girder profile, since the girder is then narrower can be led into each other. With radially outwards directed flanges can also be a uniform cross-sectional size of the flange connection achieved without being restricted constructively.

In a further preferred embodiment of the invention the flanges contained in the boom are vertical or arranged inclined to the longitudinal axis of the beam. In special cases it can be for structural reasons or for strength reasons or be advantageous for stress reasons, the Flange connection not perpendicular to the longitudinal axis of the beams to arrange. The invention provides that the different flange connections independently of one another Partitions perpendicular or inclined to the longitudinal axis of the beam exhibit.

In a further preferred embodiment of the invention the different flanges are screwed together joined. The flanges are also on their circumference distributed holes provided both with and without Thread can be formed. According to the holes with or without thread both threaded screws with and / or without a nut. Furthermore are other screw connections by equivalent Grub screws or bolts possible. Furthermore, the Flanges attached snap fasteners or cuffs conceivable which hold the flanges together and a quick one Allow assembly or disassembly.

Using the drawing, the four embodiments of the Invention shows, the invention and others are below Advantages and advantageous developments and refinements the invention described and explained in more detail.

Fig. 1

eine Seitenansicht eines Teleskopladers (Radladers) mit einem Ausleger entsprechend einer ersten erfindungsgemäßen Trägeranordnung,

Fig. 2

eine perspektivische Zusammenbauzeichnung der ersten erfindungsgemäßen Trägeranordnung,

Fig. 3

eine Seitenansicht eines Teleskopladers mit einem Ausleger entsprechend einer zweiten erfindungsgemäßen Trägeranordnung,

Fig. 4

eine perspektivische Zusammenbauzeichnung der zweiten erfindungsgemäßen Trägeranordnung,

Fig. 5

eine Seitenansicht eines Teleskopladers mit einem Ausleger entsprechend einer dritten erfindungsgemäßen Trägeranordnung,

Fig. 6

eine perspektivische Zusammenbauzeichnung der dritten erfindungsgemäßen Trägeranordnung,

Fig. 7

eine Seitenansicht eines Teleskopladers (Radladers) mit einem Ausleger entsprechend einer vierten erfindungsgemäßen Trägeranordnung und

Fig. 8

eine perspektivische Zusammenbauzeichnung der vierten erfindungsgemäßen Trägeranordnung.

It shows:

Fig. 1

2 shows a side view of a telescopic loader (wheel loader) with a boom corresponding to a first carrier arrangement according to the invention,

Fig. 2

2 shows a perspective assembly drawing of the first carrier arrangement according to the invention,

Fig. 3

2 shows a side view of a telescopic loader with a boom corresponding to a second carrier arrangement according to the invention,

Fig. 4

2 shows a perspective assembly drawing of the second carrier arrangement according to the invention,

Fig. 5

2 shows a side view of a telescopic loader with a boom according to a third carrier arrangement according to the invention,

Fig. 6

2 shows a perspective assembly drawing of the third carrier arrangement according to the invention,

Fig. 7

a side view of a telescopic loader (wheel loader) with a boom according to a fourth carrier arrangement according to the invention and

Fig. 8

a perspective assembly drawing of the fourth carrier assembly according to the invention.

In Figure 1, a telescopic loader 10 is shown, which includes a boom 14 pivotally hinged to a frame 12. The boom 14 includes a support assembly 16 to which a front piece 18 for receiving a tool (not shown) is attached. The carrier arrangement 16 contains a hollow carrier 20, preferably a box profile carrier having a rectangular profile, to the upper end of which a fastening flange 22 is welded and the lower end of which is pivotably articulated to the telescopic loader 10. The embodiment shown in FIGS. 1 and 2 is a telescopic loader 10 with a carrier arrangement 16 which contains only one carrier 20 and is therefore not telescopic. In this form, the telescopic loader 10 represents a wheel loader or the basic version of a telescopic loader 10. The front piece 18 contains a counter flange 24, which is designed in accordance with the fastening flange 22 and with this represents a flange connection 26, as shown in FIG. The flange connection 26 is produced by threaded bolts (not shown) which are guided through through bores 28 in the mounting flange 22 and are screwed into corresponding threaded bores 30 in the counter flange 24. Preferably, there are three bores 28, 30 on the upper and lower flange surfaces and four bores 28, 30 on the lateral flange surfaces, as shown in FIG. 2, on the flanges 22, 24. Depending on the size of the boom 14 and depending on the shape of the cross section of the carrier 20, both the upper and lower bores and the lateral bores 28, 30 can vary in number and position. As shown in the figures, the flanges 22, 24 are oriented perpendicularly and radially outward with respect to the longitudinal axis T _{L of} the carrier. Other embodiments, such as. B. radially inwardly oriented and / or obliquely arranged with respect to the longitudinal axis T _L flanges 22, 24 are also possible.

The front piece 18 is preferably, as in FIG. 2 is shown as a casting, the Counter flange 24 is part of the front piece 18. In a another embodiment, the counter flange 24 can also by means of a welded connection to the cast front piece 18 are firmly connected. Furthermore, the front piece 18 also be designed as a welded construction. The in Figure 2 Cast construction of the front piece 18 shown Bores 32, 34 on which the tool and Hydraulic devices (both not shown) can be attached are. The side walls 36 of the front piece 18 are with Reinforcing ribs 38 which provide the rigidity of the Increase front piece 18. There is also 40 on the front of the front piece 18 is formed a recess 42 which for Weight reduction of the front piece 18 is used. Training of the front piece 18, in particular the arrangement of the holes 32, 34, the reinforcing ribs 38 and the recess 42 shown here only as an example and can be used for each application vary in shape, size and construction. Furthermore here is also a training of the front piece as Welded construction possible.

As shown in Figure 1 and in Figure 2, in the first embodiment, the front piece 18 to only one Carrier assembly 16 containing carrier 20 flanged. As the show the following exemplary embodiments according to the invention other modular designs or variants are also possible. to Description of the further exemplary embodiments are in the following figures for similar construction elements as in Figures 1 and 2 the same reference numerals.

Figures 3 and 4 show a second embodiment of the Invention with a telescopic loader 10 one over the first embodiment of Figure 1 and Figure 2 changed or expanded or upgraded configuration of the boom 14 having. The boom 14 includes a second bracket 44 which telescopically guided or stored in the first carrier 20 and via a hydraulic device (not shown) or retractable. The mounting flange 22 for that Front piece 18 is fixed and inseparable from the second Carrier 44 connected, preferably welded. As in Figure 4 is shown, the front piece 18 with the counter flange 24 in the same way on the fastening flange 22 flanged. The design of the front piece 18 is included the same as the first, shown in Figures 1 and 2 Embodiment. The second shown in Figures 3 and 4 Embodiment of a telescopic loader 10 enables in addition a lifting and lowering function of the boom 14, as one Has wheel bearings according to the first embodiment, also the extension and extension of the boom 14, whereby the Action radius of the vehicle is increased.

In the same way are further extensions of the here shown second embodiment possible. there enables the modular design by converting the front piece 18, the boom 14 telescopically around one or more to extend guided extension supports (not shown here), then at the front end of the boom 14 or at the last Extension beam of the mounting flange 22 welded to which the front piece can be attached again.

A third exemplary embodiment is shown in FIG. 5 and FIG. 6 shown. This embodiment essentially corresponds the second embodiment of Figure 3 and Figure 4, with the difference that on the first carrier 20 the Carrier arrangement 16 of the boom 14, another Mounting flange 22 'attached, as is the first Embodiment in Figure 1 and Figure 2 shows. Here will allows a user the option, if necessary, the Disassemble telescopic loader 10. The modular design enables here, to dismantle the front piece 18, the second carrier 44 remove and on the further mounting flange 22 ' To install front piece 18 again. Conversely, the Telescopic loaders can be upgraded again. Training the Front piece 18 is the same as in the first, in the Figures 1 and 2 illustrated embodiment. The other Mounting flange 22 'is during normal operation of the Telescopic loader 10 installed and attached so that the second carrier 44 can be retracted or extended unhindered. In the same way, extended versions can also be used Mounting flanges 22 'included at the end of each Expansion carriers are installed and a retrofitting or upgrading Ease disarming.

A fourth training example is shown in FIGS. 7 and 8. Here, the boom 14 includes one between the Carrier assembly 16 and the front piece 18 used Extension beam 46. The extension beam 46 contains another counter flange 48 and another Mounting flange 50, which are formed in the same way like the corresponding flanges from the first to the third Example. According to Figure 8 form the Mounting flange 22 of the carrier 20 with the other Counter flange 48 of the extension bracket 46 a Flange connection 52 and the further mounting flange 50 of the Extension beam 46 with the counter flange 30 of the front piece 18 a flange connection 54, the flange connections 52, 54 are manufactured in the same way as that Flange connection 26 in Figures 1 to 6. By the Extension beam 46 is the modular design of the boom 14 advantageously added. By the in the exemplary embodiments explained modular design in combination with the Extension beam 46 can be in almost any way Structure of the boom and thus also the radius of action or the Functionality of the vehicle by retrofitting or upgrading or Dismantling can be varied. The formation of the front piece 18 is the same as for the first one in FIGS. 1 and 2 illustrated embodiment. Starting from the first Embodiment of Figures 1 and 2, the carrier arrangement can be extended by the extension beam 46, as in Figure 7 and 8 is shown. For this purpose, the front piece 18 from Carrier 20 released and the extension carrier 46 to the carrier 20 flanged. Then the front piece 18 to the Extension beam 46 flanged. The working height of the Boom 14 can be increased in this way. For special Applications this can be of particular benefit to the user be, because in this way no significant investments for Extension of the boom are necessary. A like one Extension by the extension bracket 46 is also for the boom shown in the second and third embodiment possible. In this case, the extension beam becomes 46 between the second bracket 44 and the front piece 18th used. Furthermore, it is also possible to add another or insert several extension beams or the Extension bars 46 in various designs to offer different lengths.

Even if the invention is only based on four Exemplary embodiments have been described, open up for the expert in the light of the above description and the Drawing many different alternatives, modifications and variants which fall under the present invention.

Claims (10)

Boom for a loader vehicle (10), preferably for a telescopic loader, with a support arrangement (16), the one end pivotable to a frame (12) of the Loader vehicle (10) can be fastened and its free end contains a mounting flange (22), and with a a front piece (18) containing a counter flange (24), the counter flange (24) on the first Mounting flange (22) can be fastened and that Front piece (18) is used to hold a tool. Boom according to claim 1, characterized in that the carrier arrangement (16) contains a first carrier (20), one end of which is the first end and at the second end of which the front piece (18) can be fastened. Boom according to claim 1 or 2, characterized in that the carrier arrangement (16) contains a first and at least a second carrier (20, 44), the at least second carrier (44) being guided telescopically in the first carrier (20) and the Front piece (18) can be fastened to the free end of the at least second carrier (44). Boom according to one of the preceding claims, characterized in that the carrier arrangement (16) contains at least one extension carrier (46) which contains a second counter flange (48) at one end and a second fastening flange (50) at its other end and between the carrier arrangement (16) and front piece (18) can be fastened, the front piece (18) being fastened to the second fastening flange (50). Boom according to one of the preceding claims, characterized in that the front piece (18) contains at least one cast part. Boom according to one of the preceding claims, characterized in that the front piece (18) is essentially designed as a cast part. Boom according to one of the preceding claims, characterized in that the supports (20, 44, 46) contained in the support arrangement (16) are designed as round, box or polygonal profiles. Boom according to one of the preceding claims, characterized in that the flanges (22, 22 ', 24, 48, 50) contained in the boom (14) extend radially outwards and / or inwards with respect to the longitudinal axis of the carrier (T _L ). Boom according to one of the preceding claims, characterized in that the flanges (22, 22 ', 24, 48, 50) contained in the boom (14) are arranged perpendicular or inclined to the longitudinal axis of the beam (T _L ). Boom according to one of the preceding claims, characterized in that the flanges (22, 22 ', 24, 48, 50) contained in the carrier arrangement (16) and in the front piece (18) can be screwed together.

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