EP2147890B1 - Industrial truck with wheel arms - Google Patents

Description

The invention relates to a truck with radar arms according to the preamble of patent claim 1.

In a certain category of industrial trucks, a pair of wheel arms are mounted laterally on the frame of the industrial trucks, bearing load wheels at the front end. The wheel arms serve to support the vehicle in the region of the load part, i. to prevent the vehicle from tipping over.

In such trucks is sometimes necessary to have a larger track width on the load side of the vehicle. If e.g. In a higher racking level, a pallet is to be removed, but at ground level, the wheel arms find no room in which they can retract, for example because of a transverse pallet, it would be desirable to have a wider track width for the wheel arms. It is known to provide a specific track width for the wheel arms for special applications. As a result, however, the manufacturing, construction and shipping requirements are changed as compared to standard vehicles of the same type. Such requirements are a cost of materials, greater manufacturing costs and a more complex installation.

There are already different ways known to change the track width of radar arms by the fact that the wheel arms are welded to the frame at different distances. However, this has the disadvantage that the track can not be changed later and that must be handled because of the breadth in production and shipping with much unwieldy vehicle frame. In addition, welded-wheel arms are not interchangeable in case of failure, so that the whole vehicle frame is affected.

Another known possibility is to adjust the interface of the radar adjustable, depending on the desired vehicle or track. However, this has the disadvantage that even with narrower vehicle designs, the material in the vehicle for the widest variant of the vehicle type must be present. In addition, the setting of the exact vehicle width is associated with additional effort.

Finally, a separate Radarmtyp can be provided for different gauges of a truck. Each of these radar types can be mounted on an interface on the vehicle frame or mast. This is about in US 6,138,796 disclosed. A disadvantage of this design, however, is that two more wheel arms are required for each additional required track. This creates a high variance in material storage.

Out EP 1 905 726 A1 an industrial truck is known in which the track is adjustable by the lateral displacement of the load wheels. The lateral displacement takes place via the insertion of spacers between the wheel and the load wheel at the front end of the Radarmes.

EP 1 905 726 A1 discloses an industrial truck according to the preamble of claim 1.

Out EP 1 502 895 A1 is a wheel of a truck known, which can be attached to the frame of a truck by means of screw. Various types of radar arms are provided to adjust the distance between the radar arms to the width of the load.

Out US 6,199,665 B 1 a wheel arm of a truck is known, which is fastened by welded joints on a truck. The wheel arm is thereby spaced by means of a cylindrical piece of pipe from the frame of the truck.

The invention has for its object to provide an industrial truck, which can be adjusted to different Radarmabstände with low material and assembly costs.

This object is solved by the features of patent claim 1.

In the truck according to the invention, a frame plate is fixedly mounted on each outer side of the frame. The frame plate has holes with a predetermined first hole pattern. The Radarmen, which have an elongated profile, Radarmplatten are connected, which has through holes. The holes result in a second hole pattern. Furthermore, at least one pair Adapter blocks provided with second holes, which give a third hole pattern. First, second and third hole patterns are identical. Radarm- and frame plate and adapter blocks are about first to fourth contact surfaces against each other. The adapter blocks have a predetermined length. Finally, in the invention, two sets of bolts are provided, each set having bolts of different lengths. The first set serves to connect the frame and Radarmplatten directly, while the second set is used to connect Radarmplatte and frame plate with an adapter block in between.

The bolts may be tension bolts which find an abutment on the frame plate while at the outer end e.g. have a thread on which a nut can be screwed on. Preferably, however, threaded bolts are provided which can be screwed into threaded bores of the frame plates to attach Radarmplatte without or with adapter block to the frame plate.

In the invention, a single interface is provided per side of the truck. Further, in the invention, there is only one type of radar arm, which in turn has an interface through which one can attach the radar arm. To create different gauges, the adapter block is mounted between the interface on the frame and the interface on the wheel arm. The adapter blocks of several pairs may have a different length, depending on the desired gauge. However, it is also possible to provide a plurality of, for example, shorter adapter blocks, where the gauge is the number of composite adapter blocks. In the invention, therefore, is not necessary to hold own Radarmtypen for different gauges, but only the adapter blocks for the arrangement between Radarmplatte and frame plate.

Radarm- and frame plates and adapter blocks have - as mentioned - contact surfaces, which may be flat in one embodiment of the invention. However, they can also allow a form fit, which can contribute to a moment transfer. The positive connection can be produced for example by a bayonet connection or by tongue and groove connection, by a toothed connection or by engagement of projections in recesses or the like.

Contrary firmly welded Radarmen these can be brought later in the invention by means of adapters to desired track width. In case of a defect, only the corresponding item needs to be replaced. Contrary to freely adjustable radar arms in the invention, only the amount of material is required, which is required for the formation of a desired track. Also, eliminates a costly adjustment of the track and the orientation, since the adapter blocks can be fixed in their width and position to the interface.

In the invention eliminates the provision of different radar arms, which always remain the same as the largest part of the construction. The smallest trace can be created by attaching the wheel arms directly to the frame, i. without adapter blocks.

Since the adapter blocks can be the same on both sides of the vehicle, only one design needs to be provided at a time.

As already mentioned, the sets of adapter blocks can have pairs of different lengths or the same length. The Radarmplatten are laterally welded to the rear end of the wheel arms.

According to a further embodiment of the invention, at least two sets of shear pins can be provided, which are receivable by second holes of the Radarmplatten, the frame plates and the adapter blocks fitting. The shear pins are used for improved transmission of torque from the wheel arms to the vehicle frame, but not for attachment of the wheel arms.

Radarmplatten and / or adapter blocks may have second threaded holes for receiving Abziehgewindestiften. Pulling off may be required if shear bolts are used. These sit under pressure in the holes, so that for removing the adapter blocks or Radarmplatten a corresponding force must be expended.

According to another embodiment of the invention, the frame plates may have a central recess. According to a further embodiment of Invention, the adapter blocks may be hollow body. The wall of the hollow adapter blocks directed toward the radar plates may have a recess. In this way, a better access can be obtained to the tapping holes for Abziehstifte.

Fig. 1

zeigt perspektivisch einen Rahmen eines Flurförderzeugs mit einem Radarm in Explosionsdarstellung,

Fig. 2

zeigt die Darstellung nach Figur 1 mit montiertem Radarm,

Fig. 3

zeigt in zwei verschiedenen Ansichten den Radarm nach den Figuren 1 und 2,

Fig. 4

zeigt vergrößert die Schnittstelle am Rahmen der Figur 1 bzw. Figur 2,

Fig. 5

zeigt perspektivisch in zwei Ansichten einen ersten Adapterblock,

Fig. 6

zeigt perspektivisch in zwei Ansichten einen zweiten Adapterblock,

Fig. 7

zeigt in auseinandergezogener Darstellung die Anordnung des hinteren Teils eines Radarms und die Anbringungsmöglichkeit von diesem an einer Rahmenplatte des Rahmens mit Hilfe von Schraubenbolzen,

Fig. 8

zeigt eine perspektivische Explosionsdarstellung für die Einstellung einer anderen Spurweite der Radarme.

An embodiment of the invention will be explained in more detail with reference to drawings.

Fig. 1

shows in perspective a frame of an industrial truck with a wheel arm in exploded view,

Fig. 2

shows the representation FIG. 1 with mounted wheel arm,

Fig. 3

shows in two different views the wheel arm after the Figures 1 and 2 .

Fig. 4

shows enlarged the interface at the frame of FIG. 1 respectively. FIG. 2 .

Fig. 5

shows in perspective in two views a first adapter block,

Fig. 6

shows in perspective in two views a second adapter block,

Fig. 7

shows in exploded view the arrangement of the rear part of a Radarms and the possibility of attachment of this to a frame plate of the frame by means of bolts,

Fig. 8

shows an exploded perspective view for the setting of another track width of the wheel arms.

In FIGS. 1 and 2 a frame 10 of a truck not shown is shown. The frame accommodates the drive arrangements for the truck as well as the load section, not shown. On both sides of the frame each wheel arms are arranged, wherein in the Figures 1 and 2 only one wheel arm 12 is shown. Such radar arms store at the front end a load wheel, which, however, is not shown here. In the following, reference will also be made only to the wheel arm 12, it being understood that the second wheel arm, not shown, is complementary.

One recognizes further in the Figures 1 and 2 in that the wheel arm 12 has, at the rear end, a wheel arm plate 14 which is fastened by lateral welding to the profile of the wheel arm 12. On the frame 10, ie on lateral frame plate, a frame plate 16 is welded in the lower region. Between the plates 14, 16, an adapter block 18 is arranged. In FIG. 2 It can be seen how these individual parts are interconnected. The dimensions of the plates 14, 16 and the adapter block determines the distance of the wheel arms from each other.

In the FIG. 3 It can be seen that the Radarmplatte 14 has first holes 20. On the side facing the vehicle frame 10 second holes 22 are provided, which do not pass though. Finally, in diameter relatively small through holes 24 are provided which have a thread (not shown). Of the holes 20 and 22, four are present, while two of the through holes 24 are provided. The holes 20 to 24 each have a predetermined hole pattern.

In FIG. 4 the frame plate 16 is exposed enlarged. It has first holes 26 and second holes 28, each resulting in a given hole pattern. Between the holes 26, 28, the plate is provided with a cross-shaped recess 30. This serves to save material.

As can be seen, the facing surfaces of Radarmplatte 14 and the frame plate 16 are flat.

In FIG. 5 enlarged, the adapter block 18 is shown. He has first holes 34 and second holes 36, each giving a specific hole pattern. The adapter block 18 is designed as a hollow body, wherein its Radarmplatte 14 facing side has a cross-shaped recess 38. The rear wall is provided with smaller diameter threaded holes 40. One recognizes in FIG. 5 Also, that the hole pattern of the holes 34, 36 is identical to the hole pattern of the holes 34, 36 on the back or on the frame 10 side facing.

In FIG. 6 is also an adapter block 18a can be seen, which differs from the FIG. 5 only distinguished by its shorter length. Incidentally, the hole pattern of the through holes is identical to that of the adapter block 18, so that it should not be discussed further.

In FIG. 7 is shown as the in FIG. 2 shown connection of the Radarms done with the frame. One recognizes in FIG. 7 four identical bolts 42 with end-side head, each associated with a disc 44. The bolts are inserted into the through holes 20 of Radarmplatte 14 and inserted through the through holes 34 of the adapter block 18 and screwed with a threaded portion at the free end in the threaded holes 26 of the frame plate 16. In this way, the wheel arm 12 can be firmly connected to the frame 10. The screw heads are preferably countersunk in the bores 20. The distance of the Radarms 12 from the side of the frame 10 is determined by the thickness of the plates 16, 14 and the length of the Adapter sleeves 18. First clamping sleeves 46 are seated in the bores 28 of the frame plate 16 and in the bores 36 of the adapter block 18. Second clamping sleeves 48 are seated in the bores 36 of the adapter block 18 and the bores 22 of the radar plate 14. The clamping sleeves 46, 48 serve to receive The moment between the wheel arm 12 and the frame 10. They sit under pressure in the associated holes, so that with the aid of not shown Abziehstiften, which in the holes 24 and in the holes 40 (in the holes 40 (Fig. FIG. 5 ) can be screwed, adapter block 18 and Radarmplatte 14 of adapter block 18 can be separated.

In FIG. 8 It can be seen how the track width of radar arms 12 can be changed by three adapter blocks 18a, 18b, 18c. It is understood that the adapter blocks 18 to 18c may also have different lengths or may be relatively short to make a fine gradation as desired. With regard to the structure of the adapter blocks 18b and 18c, it should be noted that it is the same as that of the block 18. In FIG. 8 the connecting bolts are not shown and not the clamping sleeves according to FIG. 7 ,

Claims (11)

1. An industrial truck with a frame (10) to which a drive part and a load part are attached, wherein the load part has a load receiving means movable in height, further with two parallel wheel arms (12) that are attached to the outside of the frame, wherein each wheel arm supports a load wheel, wherein:

   • means are provided for changing the spacing of the wheel arms to each other,

   • a frame plate (16) is welded onto each outside at the lateral frame sheet metal (10) that has an outer contact surface and holes (26), which yield a first hole pattern,

   • at least one pair of adapter blocks (18a, 18b, 18c) is provided with third and fourth contact surfaces and second through bores (34), which yield a third hole pattern,

   • wherein first, second, and third hole patterns are identical,

   • a first set of bolts (42) for fastening the wheel arm plate (14) to the frame plate (16) and

   • at least a second set of bolts are provided for fastening the wheel arm plate to the frame plate via, in each case, at least one adapter block (18),

   • wherein first and second contact surfaces rest against each other or on the third or fourth contact surface of the adapter blocks (18),

   characterized in that
   each wheel arm (12) has welded laterally to the rear end a wheel arm plate (14) with first through bore holes (20) that yield a second hole pattern and have an inner contact surface.
2. The industrial truck according to claim 1, characterized in that the bolts (42) are threaded bolts and the holes (26) of the frame plate (16) have a thread.
3. The industrial truck according to claim 1 or 2, characterized in that the contact surfaces are flat.
4. The industrial truck according to claim 1 or 2, characterized in that the contact surfaces engage in one another in a form locking manner, and transfer torque from the wheel arms to the frame.
5. The industrial truck according to one of the claims 1 to 4, characterized by a set of pairs of adapter blocks (18, 18a, 18b, 18c), wherein the pairs have the same or different lengths.
6. The industrial truck according to one of the claims 1 to 5, characterized in that the wheel arm plates (14) are welded laterally to the rear end of the wheel arms (12).
7. The industrial truck according to one of the claims 1 to 6, characterized in that a set of shear bolts are present that can be suitably received by second bore holes (22) of the wheel arm plates (14), the frame plates (16) and the adapter blocks (18).
8. The industrial truck according to claim 7, characterized in that the wheel arm plates (14) and/or the adapter blocks (18, 18a, 18b, 18c) have second threaded bore holes (24, 40) for receiving threaded extraction pins.
9. The industrial truck according to one of the claims 1 to 8, characterized in that the frame plates (16) have a central recess (30).
10. The industrial truck according to one of the claims 1 to 9, characterized in that the adapter blocks (18, 18a, 18b, 18c) are hollow bodies.
11. The industrial truck according to claim 10, characterized in that the wall of the adapter blocks facing the wheel arm plates (14) have a recess (38).

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