DE2250908A1 - BUMPER FOR VEHICLES - Google Patents

Description

DIPL.-ING. HORST KUSE DIPL.-ING. PETER KOSEL

3353 Bad Gandershelm, 1 7 QKt 1972

Hohenhöfen S.

Telephone: (05382) 2842

Telegram address: Siedpatent Badgandersheim

Our file no. 2738/1

Katäyama Kogyo Kabushiki Kaisha
Patent application dated 17 October 1972

Katäyama Kogyo Kabushiki Kaisha No. 1005-1 Nishi Ebara-cho, Ibara-shi, Okayama, Japan

Bumper for vehicles

The invention relates to a bumper for vehicles.

Various types of bumpers for vehicles, especially motor vehicles, have become known and have been used, which serve to protect the body of the vehicle in the event of a collision. One of these known bumpers has a Base on which is formed from a single sheet of metal that is machined in a suitable machining process and has a substantially U-shaped cross section. On the inner side of the base of the U-shaped body are included attached at a distance from each other connecting elements, namely between the legs of the U-shaped cross-section. To the to give the finished bumper the necessary corrosion resistance and a pleasant external appearance such bumpers are usually coated by electroplating. However, this has the disadvantage that residual liquid, which contains harmful chemicals from which at

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Bank account: Norddeutsche Landesbank, Bad Ganderermlm branch, account no. 22.118.970 Postal checking account: Hannover 86715

The electroplating process required to manufacture the bumper is incurred and inevitably off the production line flows into the environment, which can result in significant environmental pollution.

Furthermore, such known bumpers are often on the outer surface is provided with projections with which the bumper is given increased rigidity or strength will. Such protrusions not only affect the external appearance of the bumper in the areas in which these projections are connected to the base body, but require pre- and post-treatment processes, e.g. a Polishing and removal of the polishing powder and the plating liquid before or after the electroplating process, this entails considerable expenditure of time and effort. Furthermore, in such cases it is necessary that the blank or blank of the bumper body initially has a greater thickness and a greater cross-sectional area than is actually needed for the bumper itself, because of the inevitable loss of material during the Polishing and during the processes for removing the polishing powder and the plating liquid. The enlargement of the Thickness and cross-sectional area necessarily increases the weight of the bumper. If also with the well-known Bumpers the connecting elements are attached to the base body of the bumper by spot welding, the coating material must processed, in particular sanded, which wMerum requires time and effort.

The main object of the invention is therefore to create a bumper for vehicles and in particular for motor vehicles, in which the described disadvantages of the known bumper be avoided. In particular, the ratio between the strength achieved and the weight of the bumper should be improved without affecting the external appearance of the bumper. Due to the special Design of the bumper according to the invention should be finer Electroplating process in the production of the bumper completely

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can be avoided, saving time and labor, so that the cost of the bumper can be reduced. Finally, the aim is to ensure that the bumper can be manufactured essentially free of spot welding processes that could lead to surface defects.

This object is achieved according to the invention and these advantages are achieved according to the invention by a multilayer. Base body, which has an outer cover part for generating the external appearance and a core part for generating the required rigidity and strength, the outer cover part made of a corrosion-resistant metal sheet selected from the group consisting of aluminum and stainless steel, and the core part made of a corrosion-resistant one treated steel sheet is shaped. The outer cover part made of sheet metal thus takes over the outer cover, while the core part made of sheet steel can be viewed as a supporting structural part. Both parts can be easily joined together to form a multi-layered base body, whereby spot welding processes on the outer surface can be avoided. The outer cover in the form of corrosion-resistant sheet metal makes an electroplating process superfluous.

Further features and essential advantages of the invention emerge from the subclaims and from the following Description.

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In the following the invention is explained with reference to the drawing, whereupon further features and advantages of the invention emerge. The drawing therefore shows a for comparison Bumper of known design and several AusfUhrungsbeispiele the bumper according to the invention. Ee "own"

Figure 1 is a perspective view of one type of known one Design of a bumper for vehicles,

Fig. 2 shows a cross section through the bumper along line II-II in Fig. 1 on an enlarged scale,

3 shows a cross section through a first embodiment of a bumper according to the invention,

4 shows a cross section through a second embodiment of a bumper according to the invention,

.- ii

5 shows a cross section through a third embodiment of a bumper rod according to the invention,

6 shows a cross section through a fourth embodiment of a bumper according to the invention,

Flg. 7 shows a cross section through a fifth embodiment of a bumper for vehicles, in particular a motor vehicle truck, according to the invention.

For a better understanding of the invention, reference is first made to the known design according to FIG. 1 and 2 are referred to. As in As shown in Fig. 1, the known bumper has one Base body a, which consists of sheet metal that is processed in a suitable metalworking process and a has a substantially U-shaped cross-section and spaced apart connecting elements b, which in suitable Way attached to the inside of the base between the upper and lower legs of the U-cross section of the base body are. Such a bumper is usually coated with metal by electroplating so that the finished Bumper can be corrosion resistant and have an acceptable external appearance. However, such a

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knew bumper's disadvantage that the dangerous, chemicals containing residual liquid from the (galvanizing process that was used in the course of machining the bumper, inevitably from the production line to the area leaks out and therefore leads to environmental pollution.

Furthermore, such a known bumper is often found the outer surface is provided with not shown projections, to give the bumper body an increased strength. However, such projections not only disrupt the external appearance of the bumper in areas where the projections are connected to the base body, but also require pre-treatment and post-treatment, e.g. polishing and removing the polishing powder and plating liquid before and after the electroplating process, these additional dimensions takes a considerable amount of time and effort. Furthermore is. it is necessary in such a pail that the Cut or blank of the bumper is initially given a greater strength and a larger cross-section than it actually is is necessary, namely to take into account the material losses *, which is inevitable during polishing and the process of removing the polishing powder and plating liquid occurs. However, the increase in thickness and the cross-sectional area inevitably increases Used the bumper. Finally, the known bumpers require »if the connecting elements to the base body of the Bumpers are attached by spot welding, another time- uiid labor, since the cladding metal is sanded must become.

Compared to these difficulties and Kachteile in the known bumpers, an improved bumper is achieved by the invention, in which the disadvantages of the known bumpers are eliminated. Various embodiments of the invention are shown in FIGS.

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Fig. 3 shows a first embodiment of a bumper according to the invention in cross section · It has a bumper essentially U-shaped layered base body a · This base body a in turn has an outer cover part 1 formed from corrosion-resistant sheet metal where the metal is selected from the group consisting of aluminum and stainless steel and an inner one or core part 2, which is formed from relatively inexpensive and rigid, strong steel sheet which has been subjected to a treatment to obtain corrosion resistance. As FIG. 2 also shows, the outer cover part has a greater extent than the core part 2, and there are those opposite ends of the cover 1 over the associated Ends of the core part 2 led out. They protruding ends of the cover part I are folded against the opposite side of the core part 2, as can be seen at 1 ′, and attached to the core part 2. The layered body of the bumper can be rolled, pressed or drawn or tin «combination these operations are shaped.

The bumper according to the design according to fig. Is 4 comprises • inen la cross section is substantially U-fönaigtn on geeohichteten base body a, which in turn comprises an outer cover 1 and a core part 2, said parts 1 and 2 are formed of the gleiohen material, wit reference to FIG described. 3 . In the embodiment, the outer cover part 1 is shorter than the core part 2 in its extension a particular area of the associated part at substantially right angles to the plane of the base of the U-shaped core part. As in the first embodiment according to FIG. 3, do the opposite ends of the outer cover part 1 extend beyond the associated legs of the core part 2 and are against the respective opposite side of the core part ? folded and attached as shown at 1 ¹ .

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The embodiment according to Pig x 5 corresponds in most features of the embodiment of Mg "4 except that the core part 2 of the core portion is provided with two spaced apart by a distance equal projections 3 ¹ on the inner side of the base. These projections 3 ¹ are in the same way as based on Pig. 4, as described, formed out of the core part 2 by splitting.

The embodiment according to Pig * 6 also corresponds in the essential features to the embodiments according to Pig. 4 and

5 with the exception that on the inside _{χ of} the U-shaped cross-section of the core part 2, three projections are formed by splitting, one projection 3 at the base of the U-shaped cross-section and two projections 3 ^M near the ends of the Leg of the U-shaped cross-section. All the projections are formed from the core part 2 by splitting as shown in Pig. 4 and 5 ". As Pig.

6 shows, in this embodiment the projections 3 ⁽¹ are directed inwardly towards one another.

In the Pig. 7 are the essential components corresponding to the embodiment according to Pig. 4 with the exception that a connection element 4 is attached to the projection 3 formed on the base of the core part 2. The connecting element 4 is meandering and has a first section which runs parallel to one leg of the core part 2 and is fastened to it by spot welding at 6 _e. This fastened section is followed by a second section at an obtuse angle and has a fastening opening 5 on. Finally, the connecting element 4 is provided with a third section which extends at a substantially right angle from the section 5 and is connected to the projection 3 by spot welding at 6 ^! is attached. The welded connections 6 and 6 ¹ are usually hidden from view and therefore do not interfere with the external appearance of the bumper. The Ausjführungsf ι- * "nen -ach Pig. 5 and 6 can be provided with a concealed connection element in a similar manner,

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BATH ORIGINAL

if so desired.

Any of the described embodiments of the invention thus consists of a combination of an outer cover part that gives the bumper a good appearance a core part that gives the bumper the required strength and rigidity. In this way, the Bumper according to the invention any galvanizing process Avoided during production, which would otherwise require the use of harmful or even dangerous chemicals. This avoidance of an electroplating process during manufacture The bumpers according to the invention protect workers from accidents or injuries that would otherwise occur when using of the chemicals described are inevitable, and ultimately prevents environmental pollution that occurs in the Production of the known bumpers with an electroplating process would be unavoidable, since there is always residual liquid from the electroplating process can emerge from the production overview and, for example, could be absorbed by rivers and lakes. In the production of the described known bumpers with an electroplating process, the costs are also increased further increased by the fact that chemicals detrimental to the electroplating process are costly to store and handle Measures are required ..

The elimination of an electroplating process in the manufacture of the bumpers according to the invention therefore leads to the opposite the well-known bumpers to significant improvements. The well-known galvanized bumpers have the disadvantage that such bumpers are easily rusty if the galvanized coating as a result of τοη cracks, cracks or damage flakes off, which also affects the external appearance of the bumper. On the other hand, bumpers, which are constructed according to the invention, rusty only if cracks or fissures run through the entire thickness of the outer cover part ao that the service life including the good external appearance compared to the known bumpers is significantly increased. Furthermore, since the

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outer ends of the outer cover part are folded against the associated ends of the core part, sharp edges are created on the Core part covered so that injuries when washing the vehicle later are avoided and the risk of accidents is largely reduced will.

Since in the embodiments of the bumper according to the invention according to Pig. 4 to 7 one or more jumps immediately be molded in one piece from the core part, the bumper according to the invention in comparison to the known Bumpers of the same thickness of the sheet metal used without such projections have a much greater strength with the additional Weight of the material of the projection or projections, with the same required strength, the bumpers can According to the invention are therefore formed from thinner materials than the known bumpers, so that the weight and the cost of the bumpers can be reduced. Even if on the covered outer side of the core part when folding the projection or projections a gap is formed, this gap is completely covered by the outer cover part, so that the appearance of the bumper is not impaired in any way. Also in the embodiment according to FIG. 7, in which the connecting element is welded to the projections, The welded joint does not affect the external appearance of the bumper, as the affected area is against Inspection is hidden. However, this means that the welded connections are not reworked, in particular ground must be, which in turn saves costs and working time, which would otherwise be with the known bumpers would be necessary to remove deformations or excess of applied material from the welded joint.

It is expressly noted that the illustrated and described embodiments are only examples of the Possible embodiments of the invention represent ulid their Do not limit the inventive concept in any way.

Patent attorneys Dipl.-l.-ij. Horst Rose Dipl.-Iiig. Father Koeal

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Claims (1)

DIPL-ING. HORST «dSE_ J (Q. DIPU-ING. PETER KOSEL 3353 Bad Gandenheim, October 17th, 1972 P.O. Box 129 Hohenhöfen5 Telephone: (03382) 2842 Telegram address: Siedpatent Badgandersheim Our file no. 2738/1 Katayama Kogyo Kabushlkl Kaisha Patent application dated October 17, 1972 Claims push rod for vehicles, characterized by a mehi ^ cjj / chtigen base body (i), which has an outer cover part (1) for generating the external appearance and has a core part (2) for generating the required rigidity and strength, the outer cover part (1) made of a corrosion-resistant sheet metal, selected from the group consisting of aluminum and stainless steel, and the core part (2) is formed from a corrosion-resistant treated steel sheet. 2. Bumper according to claim 1, characterized in that on the side facing away from the outer cover part (1) from the core part (2) and integrally with this at least one projection (3.3 ', 3 ¹¹ J is formed, 3 · bumper according to claims 1 and 2, thereby characterized in that on the projection (3) and on the core part (2) on the side on which the projection is formed, a Connecting element (5) is fixed by spot welding 4. Bumper according to one or more of the claims 1 to 3 »characterized in that the cover part (1) extends with opposite ends over the edges of the core part (2) and around the edges of the core part against it the side facing away from the cover part (cover part and core part are connected to one another at their edges by folding the cover part). 309818/0735 ^{Rö / R} «· Bank account: Norddeutsche Landesbank, Bad Qandershelm branch, account number 22.118.970 Postal checking account: Hannover 66715 5β bumper according to one of the preceding claims, characterized in that the core and cover part formed base body has an approximately U-shaped cross section 6. bumper according to claim 5 »characterized in that that a projection (3) extends at least approximately perpendicular to the base of the U-shaped core part (2). 7. Bumper according to claim 5, characterized in that two projections (3 ¹ ) extend at least approximately perpendicular to the base of the U-shaped core part (2) at a distance from one another. 8. A bumper according to claims 5 and 6 or 7, characterized in that in addition two projections (3 ¹¹ ) on the side facing away from the cover part (1) of the core part (2) in the vicinity of the leg ends of the U-shaped core part are directed towards one another and extend at least approximately at right angles to the protrusion or protrusions (3 »3 ') on the base of the core part · 9. Bumper according to one or more of claims 2 to 8, characterized in that the projection or the projections (3, 3 ', 3 ^lf ) are formed by splitting the core part (2) on the side facing away from the cover part (1). Patent attorney " OipL-lng. H or β * R Ott Dipl.-Ing. Peter Kl 3U9818 / 073S Blank page