WO2014056837A1

WO2014056837A1 - Transport packaging for an annular bearing part, packaging unit having the same and method for packaging an annular bearing part

Info

Publication number: WO2014056837A1
Application number: PCT/EP2013/070807
Authority: WO
Inventors: Thilo Von Schleinitz
Original assignee: Aktiebolaget Skf
Priority date: 2012-10-12
Filing date: 2013-10-07
Publication date: 2014-04-17
Also published as: DE102012218637A1; EP2906479A1; US20150321830A1

Abstract

The invention relates to transport packaging (1) for receiving at least one annular bearing part (2). According to the invention, the transport packaging (1) has a plurality of slats (5) for supporting the annular bearing part (2) and a plurality of blocks (6) for form-fitting fixation of the annular bearing part (2) that are plastically deformable by the action of the annular bearing part (2).

Description

TRANSPORT PACKAGING FOR A RINGERED BEARING PART, PACKAGING UNIT THEREFOR AND METHOD FOR PACKAGING ONE

RINGED BEARING PART

The invention relates to a transport packaging for an annular bearing part. Furthermore, the invention relates to a packaging unit with such a transport packaging and an annular bearing part and a method for packaging an annular bearing part.

Large rolling or plain bearings, for example, in the meter diameter range, unlike the usually delivered in cardboard boxes small warehouse weight-usually shipped in wooden boxes. Here, a square wooden box is equipped with a single bearing, which is lying, so with a vertical axis, therein.

Such wooden boxes are also used before the completion of the complete warehouse to transport the bearing rings, for example, for coating or other operations. In this case, a single inner or outer ring lie in the box, or the inner ring is located in the associated outer ring and thus a pair of rings in the same box.

It is necessary to secure the bearing rings or bearings against slipping in the box, as otherwise damage to both the contents and the box itself may occur during transport. For a pair of bearing rings, it must not come to mutual metal contact, otherwise scratches and punch marks occur. A bearing ring must not move back and forth, otherwise it will get scratches and smoothing marks. Also, a bearing ring must not be able to move and accelerate to the box side wall, as he could otherwise penetrate this. It is also necessary to keep bearing rings or bearings at a distance from the bottom of the box in order to be able to pull hoist straps under the bearing ring or the bearing for removal.

Usual solutions look like that on the box bottom, a diagonal, possibly felt-bonded, wood cross bar is screwed on which the bearing ring or the bearing is placed to ensure the required distance from the bottom of the box.

In some designs straps are then placed around the bearing, so that the bearing can be fixed non-slip on the wooden slat cross. This requires very stable breakpoints with overall increased packaging costs. The closures of the straps pose a risk of damage to the rings in handling. The separate attachment of outer and inner ring is usually not possible for reasons of space.

In other embodiments, wood or plastic blocks are screwed as riders on the wooden crossbeams, which serve as horizontal stops for the bearing rings. Since per pair of bearing rings at least eight blocks are used with two screws, which are to be removed at each removal, the effort when used as a transport box between individual processing steps is high, given the loss of items, and the wood threads tend to increasing loss of stability. Frequently, free wood chips are observed at the gland areas. For reasons of quality, the condition of the fasteners after multiple in-plant use does not always allow the same box to be passed on to the end customer as packaging, which would be the most resource-saving solution. Also, it may be that the complete camp again requires different attachment points than the individual rings, and some required for the in-house ring transport screw holes for the final packaging are no longer needed and unattractive exposed. Since the positions of the blocks are to be selected differently for each bearing ring / bearing type and size, a type-specific positioning associated with time is also necessary.

The aforementioned blocks are nowadays mostly made of plastic and not made of wood. Wooden blocks can be split by the long screws. In addition, the screws can be bent because of the resilience of the wooden blocks. Multiple use of the wooden blocks is associated with a loss of quality and therefore only limited possible. Because of a not complete return of packaging material and the often found used condition of the plastic blocks, these quite massive and large injection molded parts with 8 pieces per box are often to dispose of after a single use of the final packaging. In addition, known wood or plastic blocks as attacks have the disadvantage that they form a line contact with the bearing ring. This can lead to scratches and marks, especially if the bearing ring has a coating such as a blackening or a phosphating.

The object of the invention is to make a transport packaging for annular bearing parts so that they can be implemented easily and inexpensively, in particular with regard to their internal structure that uncomplicated handling is possible and that a reliable fixation of the annular bearing parts is guaranteed.

This object is achieved by the feature combinations of the independent claims.

The transport packaging according to the invention for receiving at least one annular bearing part has a plurality of strips for supporting the annular bearing part and a plurality of plastically deformable blocks by the action of the annular bearing part for the positive fixing of the annular bearing part.

The transport packaging according to the invention has the advantage that it can be realized inexpensively, very easy and flexible to handle and ensures a gentle and reliable fixation of the annular bearing parts. The risk of transport damage is considerably reduced by the transport packaging according to the invention. Due to the plastic deformability of the blocks a very precise molding of the annular bearing part is ensured in the blocks. Wood is saved compared to a known transport packaging with a diagonal wood cross on the whole diagonal length, although twice the number of support points is provided for the annular bearing part, for example, eight instead of four pieces. In the transport packaging according to the invention, no waste in the form of unusable wooden boxes and screws, but it is at best to dispose of the blocks. The strips can serve to establish the vertical position of the annular bearing part. The blocks can be squeezable down to the level of the strips. Furthermore, the blocks may be partially compressible, in particular in the region of the annular bearing part.

The annular bearing part may be a bearing ring of a bearing. Likewise, the annular bearing part may be a complete bearing. The bearing may be formed as a rolling bearing or as a sliding bearing.

The blocks can be fixed by the strips. In particular, depending on a block between two bars be clamped. This allows easy replacement of the blocks without tools.

Furthermore, the blocks can survive on the last. This ensures that the annular bearing part is formed when placed on the strips in the blocks.

The blocks can be made of a hard foam material. This has the advantage that after transport no traces caused by the transport packaging or even damage to the annular bearing part can be observed. In particular, the blocks can be made of polyurethane foam. As a result, in contrast to elastic foams, sharp-edged impressions with corresponding vertical support surfaces are generated around the annular bearing part. Also, such a foam material has a high load bearing capacity. Other advantages are that the material weight of the rigid foam material is very low, the material is highly compressible and its disposal is not environmentally hazardous.

The density of the rigid foam material can be matched to the weight of the annular bearing part. This allows a consistently optimal formability. The rigid foam material may be colored differently depending on its density. As a result, confusion can be reliably avoided.

The blocks can be wrapped in a foil. This has the advantage that the annular bearing part is reliably shielded from the material of the blocks. Also, the storage and handling of the blocks can be made more flexible, since not with a release of particles must be expected. The film may be a plastic film, in particular a polyethylene film. Preferably, a low density polyethylene film (PE-LD) is used. The thickness of the film can be a maximum of 50 μιη. A small thickness is important in that the film is to participate in the deformation of the blocks without too much resistance.

The transport packaging according to the invention may have a bottom and a plurality of side walls. The side walls can be connected directly to the ground. Furthermore, the strips can be firmly connected to the floor and / or the side walls.

This results in a high stability. The connection can in each case be designed in a form-fitting manner, in particular by screwing. The strips can each rest on the ground and / or strike against a side wall. The longitudinal extent of the strips may be less than half the distance to the opposite side wall. This allows a saving of material without sacrificing the bearing surface of the annular bearing part. The blocks can rest on the ground and / or strike against a side wall. The floor and / or the side walls and / or the strips can be made of wood.

The strips may have a support of a soft material, for example made of felt. As a result, damage to the annular bearing part can be avoided.

The packaging unit according to the invention has a transport packaging according to the invention and an annular bearing part, which is plastically molded into the blocks.

In the method according to the invention for packaging an annular bearing part, the annular bearing part is lowered into a transport packaging until it rests on a plurality of strips. During lowering, the annular bearing part is plastically molded into a plurality of blocks of the transport packaging and thereby fixed in a form-fitting manner transversely to the direction of insertion.

The method according to the invention has the advantage that no type-specific adjustment or preparation is necessary for the packaging process. The individualization of the transport packaging on a special annular bearing part takes place during the packaging automatically by molding the bearing into the blocks. Even if a centered insertion of the annular bearing part in the transport packaging is preferred, a deviation from an exact centering no too large negative impact, as is ensured by the formation of the annular bearing part in the blocks then a secure fit of the annular bearing part in the transport packaging ,

By lowering the annular bearing part down to the strips, the vertical position of the annular bearing part can be determined. The blocks can be compressed down to the level of the strips. Furthermore, the blocks can be partially compressed, in particular in the region of the annular bearing part.

The blocks can be deformed in the radial region of the annular bearing part and retain their shape radially inwardly and radially outwardly of the annular bearing part.

In particular, the blocks can be deformed by the weight of the annular bearing part. The deformation can be supported by an additionally exerted on the annular bearing part contact pressure. This can be particularly advantageous if the blocks are not deformed so much by the weight of the bearing that a reliable support of the annular bearing part is ensured on the strips or if the deformation process would otherwise take too long time.

In a further use of the transport packaging, the blocks can be replaced. The other components of the transport packaging can be retained. In this way, a condition of the transport packaging which is at least technically new can be produced by a comparatively small use of material. It is also possible to maintain the blocks in a further use of the transport packaging. In this case, it may be provided that the blocks are rotated. It is thereby achieved that the annular bearing part forms again in the blocks. Especially many turning variants can be achieved with cube-shaped blocks. In particular, the blocks are retained during the use of the transport packaging as part of the manufacturing process of the annular bearing part and exchanged during shipping to the customer. The invention will be explained below with reference to the embodiment shown in FIGS.

Show it:

FIG. 1 shows an exemplary embodiment of a transport packaging according to the invention, in a top view,

FIG. 2 shows an enlarged detail from FIG. 1 in the region of a last pair,

Figure 3 shows the detail shown in Figure 2 in section and

Figure 4 is a perspective view of a section of the transport packaging.

FIG. 1 shows an exemplary embodiment of a transport packaging 1 designed according to the invention in plan view.

In the illustrated embodiment, the transport packaging 1 is equipped with an annular bearing part 2, which is designed as a bearing ring. The bearing ring may be an inner ring or an outer ring of a roller bearing or a plain bearing. Furthermore, the annular bearing part 2 can be a bearing which can be designed as a roller bearing or as a slide bearing and has an inner ring and an outer ring. The transport packaging 1 can also be equipped with a plurality of annular bearing parts 2, for example, an outer ring and an inner ring, which are arranged concentrically to each other.

The transport packaging 1 is designed as a box, in particular as a wooden box, and has a square-shaped bottom 3, four rectangular side walls 4 and a non-figured lid, which coincides in its shape with the bottom 3. The bottom 3, the side walls 4 and the cover may each consist of one or more boards or plywood panels. On the floor 3 four pairs of strips 5 are arranged so that they each hit one of the side walls 4. The strips 5 of each pair are arranged at a distance from each other in parallel. In the resulting gap between the strips 5 of each strip pair, a respective block 6 is arranged so that it rests on the bottom 3 and abuts against one of the side walls 4. The blocks 6 are respectively clamped between the strips 5 of a strip pair and thereby fixed. With respect to the extension of the side walls 4 parallel to the bottom 3, the blocks 6 are each arranged centrally.

The strips 5 may in particular be made of wood and have on its upper side a not figuratively represented pad made of felt or a similar material. The blocks 6 may be made of a rigid foam material and coated on all sides with a plastic film. In particular, the blocks 6 can be welded in the film. As hard foam material is a non-corrosive and Konservierö resistant rigid polyurethane foam. The plastic film may be, for example, a 25 μm thick polyethylene film. In particular, a PE-LD film, i. H. a low density polyethylene film (low density) is used.

FIG. 2 shows an enlarged detail from FIG. 1 in the region of a strip pair. An associated sectional view, in which the sectional plane runs parallel to the bars 5, is shown in FIG. 3.

As is apparent from Figures 2 and 3, the strips 5 are fixed by means of two ground screws 7 at the bottom 3 and by means of a respective first side wall screw 8 on one of the side walls 4. Furthermore, the side walls 4 are fastened in the region of each bar 5, each with a second side wall screw 9 on the bottom 3. By further second side wall screws 9, with which the side walls 4 are fixed to the bottom 3 and which are not visible in Figures 2 and 3, the stability of the transport packaging 1 is increased. The screws may in particular be wood screws.

The first side wall screws 8 and the ground screws 7 connect via the strips 5, the side walls 4 in addition to the bottom 3 directly in the load introduction area and reduce the lever arm, with an accelerated parallel to the bottom 3 annular bearing part 2 acts on the connection between the side wall 4 and bottom 3 , The annular bearing part 2 rests on all strips 5 and blocks 6, wherein the strips 5 define the vertical position of the annular bearing part 2. The blocks 6 are compressed in the region of the annular bearing part 2 by the weight and possibly a temporarily applied additional contact pressure to the level of the strips 5. However, this applies only to the areas of the blocks 6, in which the annular bearing part 2 rests on the blocks 6. Outside these areas, the blocks 6 are not compressed by the annular bearing part 2 and stand on the strips 5 over. Thus, the areas of the blocks 6 laterally overlap the annular bearing part 2 in a direction perpendicular to the bottom 3 with the annular bearing part 2 and thereby fix the annular bearing part 2 in a form-fitting manner in all directions, which run parallel to the bottom 3. The blocks 6 themselves are held by the strips 5, the side walls 4 and the bottom 3. On one of the side walls 4 directed displacement forces of the annular bearing part 2 are supported by the respective block 6 against the respective side wall 4, which is bolted in the load introduction area with the strips 5 and the bottom 3.

The packaging of an annular bearing part 2 with the transport packaging 1 according to the invention can be carried out as follows:

If the transport packaging 1 in the closed state, d. H. is provided with the lid mounted, the transport packaging 1 by removing the lid, which may be fixed by means of clips on the side walls 4, opened. If the transport packaging 1 is not yet equipped with blocks 6, four blocks 6 are individually clamped between two adjacent strips 5, that they rest on the bottom 3 and rest against one of the side walls 4. If new, d. H. hitherto not yet used, blocks 6 are used, these have a cuboid shape and are on the strips 5 on.

When these preparatory work is completed, the annular bearing part 2 is inserted as centered as possible in the transport packaging 1. Since the blocks 6 protrude beyond the strips 5, the annular bearing part 2 when lowering in the transport packaging 1 initially only touches the blocks 6, which are increasingly pressed locally and sharp-edged by the weight of the annular bearing part 2 and possibly by an additional contact pressure. This is a plastic deformation of the ze 6 which is limited almost exclusively to the area of the contact surface with the annular bearing part 2, ie the shape of the annular bearing part 2 is plastically formed in the blocks 6. Laterally next to the annular bearing part 2, the blocks 6 are not deformed. The film, which encloses the blocks 6, is stretchable and makes the deformation of the blocks 6 when the annular bearing part 2 is pressed in without tearing. The film prevents the material dust formed during deformation of the blocks 6 from reaching the annular bearing part 2. Since the material dust is neither corrosive nor of questionable hardness, the film can be omitted in principle, but serves to maintain the workpiece cleanliness.

The lowering of the annular bearing part 2 is continued until it abuts against the strips 5 and then rests stably on the strips 5 and the blocks 6 and laterally partially enclosed by the material of the blocks 6. Thus, the annular bearing part 2 is securely fixed for transport and the transport packaging 1 can be closed by placing and securing the lid.

In cases where anyway the bottom 3 of the transport packaging 1 is designed with a PE film smaller than 50 μιη thickness to collect Konservieröl and / or on the annular bearing part 2 or to protect the annular bearing part 2 from environmental influences, the procedure described modified as follows:

After inserting the blocks 6 in the transport packaging 1, the film is placed on the floor 3, that the blocks 6 are covered. As a result, a reliable protection of the annular bearing part 2 is guaranteed against any particles of the blocks 6, so that the blocks 6 need not necessarily be welded itself.

To remove the annular bearing part 2 from the transport packaging 1, the cover is removed from the transport packaging 1 and the annular bearing part 2 is raised perpendicular to the bottom 3 and removed from the transport packaging 1. The deformation of the blocks 6 generated by the annular bearing part 2 remains virtually unchanged after the removal of the annular bearing part 2. The blocks 6 do not clamp on the ring-shaped bearing part 2 and remain in the transport packaging 1. For the further use of the transport packaging 1, the blocks 6 in the transport Packaging 1 remain or be removed and replaced with new blocks 6. This will be explained in more detail with reference to FIG.

FIG. 4 shows a perspective view of a section of the transport packaging 1. The illustrated region comprises a block 6 and the associated strips 5 as well as adjacent regions of the bottom 3 and a side wall 4.

The illustration relates to a time after the removal of the annular bearing part 2 from the transport packaging 1. Accordingly, the block 6 has a clear imprint 10 of the annular bearing part 2. In principle, it is possible to use the block 6 despite the impression 10 in the same position again. This is possible in particular when the further use is provided for an annular bearing part 2 of identical size. Then an identical imprint 10 would arise anyway. However, with a repeated use of the pad 6, an increasingly loose fit of the annular bearing part 2 in the transport packaging 1 can occur, since the impression 10 tends to be increased with repeated use of the pad 6. This can be caused for example by positioning inaccuracies when inserting the annular bearing part 2 in the transport packaging 1. It is also possible to use the same block 6 in an unchanged position for an annular bearing part 2, which causes a larger impression 10, which completely covers the existing impression 10. According to a further procedure, the block 6 is changed before being used again in its position. For this purpose, the block 6 can be rotated for example by 90 ° or 180 ° about a parallel or perpendicular to the bottom 3 extending axis. In this way it is achieved that when inserting the annular bearing part 2 in the transport packaging 1 new material of the pad 6 is pressed and thereby a tight fit of the annular bearing part 2 is achieved. Under the condition that each time a new impression 10 is to be formed, a parallelepiped block 6 with exclusively non-square surfaces can be used twice. If the annular bearing part 2 is strongly eccentrically pressed into the block 6, this can be used four times. In an analogous manner, a cuboid block 6 with two square surfaces can be used four or eight times. A cube-shaped pad 6 can be used six or twelve times. Reuse of the blocks 6 is particularly recommended for transport operations in the context of the manufacturing process of the annular bearing part 2, z. B. for transport to a burnishing plant.

A particularly tight fit of the annular bearing part 2 in the transport packaging 1 is achieved if the blocks 6 are used only once and renewed before the insertion of the annular bearing part 2 into the transport packaging 1. This is indicated in Figure 4 by the further block 6 above the transport packaging 1. This further block 6 is still unused and accordingly has no impression 10. After removing the used block 6, the further block 6 is inserted into the space between the bars 5 shown and clamped there. An exchange of the blocks 6 is recommended in particular at delivery of the finished annular bearing part 2. By replacing the blocks 6 before delivery, the transport packaging 1 can be placed in a mint condition.

Since the blocks 6 are only plugged in, a manual exchange without tools is possible at any time. It is also possible to retrofit a used transport packaging 1 for another annular bearing part 2 or another type or size of the annular bearing part 2 by exchanging the four blocks 6. There are thus no type-specific attachment features and residues of the previous use.

If a plurality of annular bearing parts 2, for example, an inner ring and an outer ring are placed inside each other in a common transport packaging 1, they must be centered or at least spaced from each other. They both press their contours into the four blocks 6 and a non-pressed bridge remains in each case between the annular bearing parts 2 and prevents it from coming to metal contact between the annular bearing parts 2 during transport. The need for conventional transport packaging and manually inserted between the annular bearing parts 2 foam plates omitted so.

For particularly heavy annular bearing parts 2 can be provided to provide twice the number of blocks 6 per transport packaging 1. There is still a uniform block dimensions possible, only the numbers between then further apart strips 5 would be doubled.

In addition, it is possible to foam the polyurethane foam in the specific weight classes of annular bearing parts 2 matching density in the production of the blocks 6. Thicker foams have a higher load-bearing capacity and thus better stability with horizontal force introduction via the annular bearing part 2, but can also be pressed in harder. The different densities can be identified by different foam colors.

LIST OF REFERENCE NUMBERS

1 transport packaging

2 bearing part

3 floor

4 side wall

5 bar

6 logs

7 ground screw

8 first side wall screw

9 second side wall screw

10 impression

Claims

Patent claims

1. Transport packaging for receiving at least one annular bearing part (2), with a plurality of strips (5) for supporting the annular bearing part (2) and several by the action of the annular bearing part (2) plastically deformable blocks (6) for the positive fixing of the annular bearing part (2).

2. Transport packaging according to claim 1, wherein the blocks (6) are fixed by the strips (5).

3. Transport packaging according to one of the preceding claims, wherein the blocks (6) over the strips (5) survive.

4. Transport packaging according to one of the preceding claims, wherein the blocks (6) are made of a rigid foam material.

5. Transport packaging according to one of the preceding claims, wherein the blocks (6) are made of polyurethane foam.

6. Transport packaging according to one of the preceding claims, wherein the blocks (6) are enveloped by a film.

7. Transport packaging according to one of the preceding claims, wherein the blocks (6) are enveloped by a polyethylene film.

8. Transport packaging according to one of the preceding claims, wherein the strips (5) have a support made of a soft material.

9. Packaging unit with a transport packaging (1) according to one of the preceding claims and an annular bearing part (2) which is plastically molded into the blocks (6).

10. A method for packaging an annular bearing part (2), wherein the annular bearing part (2) in a transport packaging (1) is lowered until it rests on a plurality of strips (5) and during lowering into a plurality of blocks (6) of the transport packaging ( 1) is formed plastically and thereby fixed in a form-fitting manner transversely to the direction of insertion.

11. The method of claim 10, wherein the blocks (6) in the radial region of the annular bearing part (2) are deformed and radially inside and radially outside of the annular bearing part (2) maintain their shape.

12. The method according to any one of claims 10 or 11, wherein the blocks (6) by the weight of the annular bearing part (2) are deformed.

13. The method according to any one of claims 10 to 12, wherein in a further use of the transport packaging (1), the blocks (6) are exchanged.