DE7901340U1 - LIFTING FRAME FOR A LIFTING LOADER - Google Patents

Description

February 23, 1979

TP-St / le B 79/04

Lifting equipment for a lift truck

The innovation relates to a mast with a fixed mast part and a movable mast part and with an between this guided hose for the pressure medium supply of hydraulically operated scaffolding, which is attached to the lifting carriage of the Masts are attachable, preferably a mast with a large free lift.

To solve this pressure medium supply task, it is known to install hose reels on the overhead guard of the lift truck or on the upper one Provide the end of the hat frame, with the hose reel under The spring is preloaded in such a way that the hose always rolls up onto the drum under the action of the spring preload as far as it is not due to a force that is greater than the spring preload is withdrawn and the pressure medium is removed from the fixed bearing of the hose through a rotary leadthrough

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drum is transferred into the hose drum. Such hose reel assemblies are very expensive and defective a relatively large amount of wear. If the hose reel is arranged at the upper end of the tiltable mast, come additional flexible connections between the mast and the loader body are added, which increase the manufacturing costs.

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The innovation is based on the task of creating an inexpensive, To create low-wear hose guide for the task mentioned above.

The object is achieved in that the hose as a free, for example hanging, loop between relative to each other mutually displaceable parts is arranged such that each tube part is closely adjacent to the part on which the end of the hose loop is attached. In the event of of a lifting mast, the parts that can be moved relative to one another can be mast parts or additional rails on the Box parts that serve only or in addition to receiving and supporting the hose loop. Because the hose on the part attached to which it is adjacent, there is never any relative movement between the hose and the part against which the hose under lateral acceleration or in the case of a lift truck with a sideways inclination of the lift truck on an inclined Road comes to concern. It's not one either

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Tensioner pulley or similar part is present that could cause wear. For the supply and return lines, two hoses arranged parallel to one another, possibly connected to one another, in particular in the form of a double hose, can of course also be provided. Compared to a hose guide with a hose drum, the hose guide according to the innovation is already considerably cheaper to manufacture. In addition, there is a significantly longer service life, since there are no parts moving against one another with friction, in particular no moving sealing points and no tensioning elements such as rollers _j loaded by springs or weights. As a result, the functional reliability is considerably greater at the same time, since there are fewer parts that are at risk of failure. The problem of where the hose reel should be arranged is also eliminated, with at least the hose unwound from the hose reel, usually also the hose reel in the driver's field of vision, preventing the unobstructed view of the load-bearing elements at least at a certain lifting height.

According to a particularly expedient design of the new building f is in a lifting carriage on a lifting frame, in which to generate the large free lift initially a part of the lifting press extends from a middle layer to an upper layer and a chain roller is mounted on this part, over which a chain is guided, on the one hand on the extendable box

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part, on the other hand is attached to the lifting carriage, provided, that the hose is connected at one end of the loop to the fixed mast part and as a free loop in one Space between the fixed mast part and the extendable mast part directly or in the space between each one on the fixed Mast part and arranged on the extendable mast part support rail is arranged and that also the hose on the other The end of the loop is attached to the extendable mast part and is still placed in the vicinity of the chain attachment and up to the lifting carriage adjacent to the Xette, preferably parallel to it above the chain roller, wherein the hose from the loader body to the lifting carriage is continuous without interruption. The two ends of the Hose loops can be attached in the upper area of the fixed mast part and the extendable mast part. Then the loop hangs from the attachment points C Because the connection to the lift truck body is mostly in the lower area

of the mast is arranged and on the other hand the hose mostly continued in the lower area of the extendable mast part it is often advantageous if the two ends of the hose loop are each in the lower area of the respective Mast part are attached. The hose loop is then infol, the stiffness of the hose between the fastening point., supported directly or indirectly by the mast

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share, rait them both ends of the hose loop respective fasteners are connected. With the aforementioned hose routing on the mast, this enables a total shorter hose. In particular with such a standing arrangement of the hose loop, it is particularly advantageous to when the two parts, which can be moved relative to one another, are at least approximately in the region of the visual tube loop parallel to each other and to the direction of the relative displacement have arranged walls, "if the ski loop the parts that support or limit the possible evasive movements do not directly affect the mast parts themselves are, can in an appropriate embodiment of the innovation

Support rails for each of the two mast sections, one support plate or one the like be attached, these parts being used to support the hose loop Particularly useful use of a hose loop with appropriate arrangement of the fastening points and, if necessary, Design and adaptation of those that can be rented to one another Parts given. An arrangement of the hose in the manner described is extremely advantageous because in the entire connection between connection on the loader body and connection on the lifting carriage no additional intermediate connections, Hose couplings, bushings or the like are available. While in the previously known configurations always different for the different lifting heights

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Variants, for example drums with different capacities, had to be kept in stock and numerous Hose connections or hose couplings had to be made, needs in this arrangement according to the innovation only hose are kept in stock and when ordering a mast with hose guide for pressure medium supply an additional hydraulic system and connected to the S-O The hose movement is very easy to control with the movement of the kub slide. There are not any There are parts against which the hose strikes or even

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behind which it can get caught, as may be the case when the hose is pulled free from a drum over a longer distance. The hose always comes up to the lifting carriage from the same direction, so that there are no kinks or additional pivotable connections, as is the case when a hose reel arranged in the middle '-' once is guided to a lower than the hose reel and in other extended positions to other lifting heights to a lifting carriage standing above the hose reel. The visibility is better because the hose is almost completely behind the mast profiles or the chain that is already there. A particularly favorable arrangement in terms of visibility is obtained when the axis of the chain roller is arranged transversely to the direction of travel, so that the two parts of the chain lie one behind the other in the direction of travel and the hose is parallel to? ' The chain is guided and guided above the chain roller. Such a hose guide curve parallel to the chain is inherent. t (DE-OS 22 33 281).

The gap-like area between the two neighboring » relatively movable parts in which the

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Hose loop hangs, can expediently be covered on one or both sides by a cover connected to one of the two parts, in which case,

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if the hose loop is directly between the mast sections depends, flanges on these mast parts can simultaneously form such side cover or then, v / enn the hose loop not directly between the mast parts but between rails attached to them, flanges or Bends on one of these rails can form such a cover or such side parts on both rails cooperate in such a way that they together form a suitable cover which protects the hose and prevents it from becoming to bend out of the plane of the loop.

In the drawing, an embodiment of the innovation is shown.

Figure 1 shows a mast from behind.

Figure 2 shows the same mast in a view from the side. Figure 3 shows the same mast in the same direction of view as in Figure 2 in section close to the central plane.

The two standing mast columns 1 are crossed by a lower cross member 2 and an upper cross member 3 connected to one another.

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and in the drawing, not shown ir.ehr V7eise aZ

Rur.pf of the lift truck, which is also no longer shown in the drawing, ir. More usual '..' mounted so that it can be tilted. Along this Standfast pillars 1, the retractable pillars 4 are slidable,

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which are connected to one another by an upper cross member 5 are. Against a base part 6 of the lower cross member 2, the downwardly extendable piston 7 is a double-acting one Lifting press supported, the cylinder 8 of which is arranged in the middle between the mast columns. From the cylinder 8 is a piston part 9, which is connected to the upper cross member 5 via a boom 10, can be extended upwards. Two chain rollers 11 are mounted on the cylinder 8, over which a chain, no longer shown in the drawing, is guided is. One end of this chain is attached to the lower cross member and the other end of the chain is attached to the lifting carriage lg attached by means of the rollers 13 along the extending mast columns 4 is movable and which has a front fork carrier plate 14. The two standing mast columns 1 are through an additional transverse stiffener 15 connected to one another.

f. The lifting carriage 12, 14 is provided that on this an attachment can be attached which has two hydraulically operated punctures. That requires that two pairs of hydraulic hoses, namely one each for the supply and one for the return of the pressure medium to the Hubsehlitten are led. For this purpose, four hose couplings 17, 18, 19 and 20 are provided on the lifting carriage. On the lift truck body are no longer shown in the drawing Hose connections are provided to which the hose

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Connections 21 and 22 of the two hoses 23 and 24 are connected, which are fastened by means of a fastening 25 to the standing mast column 1 on the left in FIG. At this
A guide rail 26 is also attached to the standing mast column 1 and to the extending mast column 4 lying opposite
a guide rail 27 is attached, both as
Angle irons are designed with a flange, the O two flange ^ assign to each other. The hoses 23 and

are attached to the lower part of the guide rail 27. As a result of the hose stiffness, the hoses 23 and 24 form a loop between the rails 26 and 27. In the left part of the
Figure 1 is this loop in the position shown in the
The lifting frame with the lowered lifting carriage is shown extended and dash-dotted lines also show the position of the upper part of the hose loop, which results
when the inner mast columns 4 are raised. The two
/ ν Parts of the loop of the hoses 23 and 24 therefore rest against the support rails 26 and 27, with each hose

due to its own rigidity based on this support

rails between these stands. The two hoses 23 and f: are then still by means of a fastening 29 on the

Cross member 28 attached, in turn on the two

Extending mast columns 4 is attached. From here the

23 and
two hoses 24 guided over three pulleys 30, the

arranged above the chain roller 11 on the left in FIG. 1 and

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B 16 -lider storage dei chain roller 11 are connected. As a result the stiffness of the hoses is approximate. Semicircular shape guided over the three pulleys 30. In the further Course, the two hoses 23 and 24 are fastened to the fork carriage 14 by means of a fastening 31 and are from here to connections 19 and 20.

⁾ In an analogous manner, there are two on the right-hand side in FIG

Hoses 33 and 34 led to the connections 17 and 18, the . are supported between two guide rails 56 and 37.

In the figures, the lifting carriage 12, 13, H is shown in the lowered position. When it is raised, the piston rod 7 first moves out of the cylinder 8 relative to the latter. Since the piston rod 7 is supported at the bottom of the cross member 6/2, i.e. cannot move in relation to the fixed V. & zz part, the cylinder 8 moves upwards and lifts the chain roller 11 with the result that it is attached to the cross member 2 Chain lifts the lifting carriage 12, 14. The hoses 23, 24, 33, 3 ^ remain parallel to the chain, i.e. the parts of the hoses 23, 24, 33 and 3 ^ assigned to the fastenings 29 and 39 do not move.

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For this part of the lifting movement, which corresponds to the free lift, the piston rods 9 and 7 do not move relative to one another, the upper part of the piston rod 7 is in a bore the piston rod 9 retracted. As a result, the piston rod 9 moves into the cylinder 8 during this Hnbbewegung The cylinder 8 travels a further stroke with the piston rod 9 further up on the piston rod 7 and in doing so takes the extendable part 4 by means of the boom 10 and cross member 5

With. The extension mast columns 4 move relative to the standing mast columns 1. The loops of the hoses 23, 24 and J 5, 34 move between the respectively assigned guide rails 26 and 27 or J 6 and 37 in the manner of a Rolling movement.

If an attachment with only one hydraulically operated function is provided, one of the hose pairs 2J, Γ and 33, 34 can be saved.

Claims (1)

Mast for a lift truck Protection claims; Lifting frame for a lift truck with a fixed mast part and a movable mast part and with a hose guide between them, one end of the hose being connected to the fixed mast part and the other end of the hose being connected to the movable mast part, characterized in that the hose (23 or 24 or 33 or 34) is arranged as a loop between the mast parts (1 and 4) which can be moved next to one another relative to one another in such a way that each tube part is closely adjacent to the part (26, 27 or 36, 37 or 1, 4) to which one end of the hose hose is connected. -2- ' ^f 3 16 -2- Mast with a
2. Hose guide according to claim 1 in a lift truck for the pressure medium line, which is connected on the one hand to the curb frame and on the other hand to the slide which can be moved on the kub frame and is used to supply an attachment with hydraulic fluid, the kub frame having a half-height cylinder, the first liftable part of which carries a catenary roller, one of which is connected to the extendable mast section , is guided on the other hand chain connected to the lifting carriage, characterized in that the hose (23 or 24 or 33 or 34) is directly or indirectly connected in one end region of the loop to the fixed mast part (1) and as a free loop in a space between directly or indirectly the fixed mast part (1) and the extendable mast part (4) is arranged and that furthermore the hose {2.3 or, 24 or 33 or 34) in the other end area of the loop directly or indirectly on the extendable mast part ( 4) is attached and placed on the extendable mast part (4, 28) near the chain attachment and from there to the lifting slide (12, 14) runs adjacent to the chain, the hose 23 or 24 or 33 or 34) being continuous from the loader body to the lifting slide (12, 14) without interruption. «<U» AJt * £ a 16 -3- Lifting frame with a h one of claims 1 or 2 for 3. Hose guide according to one of claims 1 or 2 for:; Parts, aie in at least approximately vertical direction slide against each other, characterized in that the fastenings for the fixing of each one end of the hose loop at the respective associated Part in the lower area of the hose loop and da3 the loop between the fastenings is arranged upright and that a wall supporting the loop is provided on each of the two parts is. Mast with a 4. Hose guide according to claim 2, wherein the hose loop is arranged indirectly between Ausfahrn ^ stteil and Starömastteil, characterized in that ar. Standing mast part (l) and part ( ² J-) on the extending mast each have a guide rail (26 or 27 or 36 ^ or 37) for guiding the hose loop. K'jbrerüct ™ is one
5. Hose guide according to one of the preceding claims, characterized in that the gap-like area between the two parts (26 or 27 or J6 or 37) which can be moved relative to one another is in de-r. the hose loop is arranged, is covered laterally by a cover connected to one of the two parts *