GB2162470A - A bumper bar for a motor vehicle bumper - Google Patents
A bumper bar for a motor vehicle bumper Download PDFInfo
- Publication number
- GB2162470A GB2162470A GB8514867A GB8514867A GB2162470A GB 2162470 A GB2162470 A GB 2162470A GB 8514867 A GB8514867 A GB 8514867A GB 8514867 A GB8514867 A GB 8514867A GB 2162470 A GB2162470 A GB 2162470A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bumper
- bumper bar
- reinforcing insert
- centre portion
- centre
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 description 5
- 239000006260 foam Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/22—Masks or mask blanks for imaging by radiation of 100nm or shorter wavelength, e.g. X-ray masks, extreme ultraviolet [EUV] masks; Preparation thereof
Abstract
A bumper bar (6) which extends along the centre area and angularly bent end sections of a bumper (1), includes a reinforcing insert (8) which is provided with a cover portion (7) foamed about the reinforcing insert (8) on all sides thereof, retaining elements (18) for fastening the bumper bar (6) being attached locally to the reinforcing insert (8). To provide a bumper bar (6) which can be manufactured with the use of simple and cost-favourable work tools, the reinforcing insert comprises a plurality of portions (12, 13) which are attached to one another in overlapping relationship at connecting zones between the central and bent portions, a retaining element (18) being provided at each connecting zone which extends through the portion (12, 13) and serves for the fastening of the bumper bar (6). <IMAGE>
Description
SPECIFICATION
A bumper bar for a motor vehicle bumper
The present invention relates to a bumper bar for a motor vehicle bumper which extends along the centre and angularly bent end sections of the bumper. the bumper bar including a reinforcing insert provided with a cover which is'foamed about the reinforcing insert on all sides and retaining elements for the fastening of the bumper are attached to the reinforcing insert.
In a known bumper bar of the aforementioned type (U.S. Patent 3,841,682), the reinforcing insert is made from a unitary single part, whereby for the manufacture of this insert a relatively large pressing work tool or die is necessary which entails high costs.
Additionally, it has been found that the onepiece reinforcing insert is difficult to handle, in particular, the angularly bent end sections thereof, are easily bent during transport. Such structural parts lead to a rejection rate that causes high costs.
It is the object of the present invention to so construct a bumper bar that it can be manufactured with the use of simple and costfavourable work tools and the dimensional accuracy of the reinforcing insert can be maintained.
The present invention consists in a bumper bar for a motor vehicle bumper which extends along the centre and angularly bent end sections of the bumper, the bumper bar comprising a reinforcing insert provided with a cover portion which is foamed about the reinforcing insert on all sides, and retaining members for fastening the bumper bar attached to the reinforcing insert the reinforcing insert being formed by a plurality of portions which overlap one another to form connection zones, each connecting zone having a retaining element extending through said portions which serves for the fastening of the bumper bar.
The advantages principally achieved with the present invention reside in that owing to the multi-part construction of the reinforcing insert, a simple manufacture of the bumper bar is achieved because the individual parts can be manufactured in small, cost-favourable work tools or dies.
The dimensional accuracy for the end product of the bumper bar is improved by the ability of the tolerance compensation between the individual parts of the reinforcing insert during manufacture. Since the individual parts of the reinforcing inserts are connected into a structural unit by foaming the cover portion about the reinforcing insert in a corresponding work tool, a welded or threaded connection between the parts of the reinforcing insert can be dispensed with. The foam forming the cover portion can enter through apertures in the centre part and lateral parts provided preferably at the connecting zones so that a good connection between the mutually attached parts of the reinforcing insert and the cover portion is achieved.
The retaining elements arranged in the connecting zones effect a functionally correct connection between the individual parts of the reinforcing insert.
In the accompanying drawings:
Figure 1 is a schematic plan view of a bumper mounted on a motor vehicle provided with a bumper bar in accordance with the present invention;
Figure 2 is a partial elevational view taken in the direction of the arrow R shown in
Figure 1;
Figure 3 is a partial elevational view taken in the direction of the arrow S shown in
Figure 2 of the reinforcing insert in accordance with the present invention;
Figure 4 is a cross-sectional view, on an enlarged scale, taken along the line IV-IV of
Figure 3 and reversed;
Figure 5 is a cross-sectional view, on an enlarged scale, taken along the line V-V of
Figure 4 and reversed; and
Figure 6 is a partial elevational view taken in the direction of the arrow T shown in
Figure 5.
Referring now to the drawings a bumper 1 is held in position on a vehicle body 3 by two retaining members 2 arranged on both sides of the longitudinal centre plane A-A. The bumper 1 which is made of aluminum, steel or plastics material, has an approximately Ushaped profile as viewed in cross section and shown in Figure 4, the open side 4 of the profile being directed toward the vehicle body 3. A bumper bar 6 which is attached to an approximately vertically extending web 5 of the bumper 1, is approximately trapezoidal shaped in cross-section.
The bumper bar 6 is formed by a cover portion 7 of a yielding material and a reinforcing insert 8 embedded in the cover portion 7.
A foamed material, preferably polyurethane foam, is used as material for the cover portion 7, whereas in contrast, the reinforcing insert 8 consists of metal (steel or aluminum) or plastics material.
The bumper bar 6 extends along a centre section 9 and bent-off end sections 11 and 11' of the bumper 1, which preferably cover a vehicle body member 10. The reinforcing insert 8 which extends along a web 5 of the bumper 1 has a centre portion 12 and two side portions 13 adjoining same, with the connecting zones 14 of the centre portion 12 and side portions 13 are attached to one another in overlapping relationship. The overlapping area B (Figure 3) is approximately 30mm to 50mm.
The centre portion 12 extends in the vehicle transverse direction C-C (Figure 2) and is matched to the curved configuration of the bumper 1, terminating in free outwardly disposed ends 15. The two side portions 13 have a more pronounced curvature in an area 16 adjoining the connecting zone 14.
The centre portion 12 and the side portions 13 are provided, at least within the connecting zones 14, with a profiling 17 effecting a form-locking connection. The profiling 17 may be U-shaped, V-shaped, W-shaped or the like.
Fixing of the centre portion 12 and side portion 13 in the longitudinal and vertical directions is achieved by the profiling 17, however, adjustment in the vehicle transverse direction C-C is made possible thereby.
As shown in Figure 5, the side portion 13 extends at a smaller distance with respect to the web 5 of the bumper 1 than the centre portion 12. At each connecting zone 14 a retaining element 18 is provided at the centre portion 12 which is preferably formed by a threaded bolt 1 9 provided with a bolt head.
The threaded bolt 19 is securely connected to the centre portion 12 by brazing, welding or the like, and the bolt head is supported on the side 20 of the centre portion 12 opposite the web 5 within the area of a U-shaped indentation 21 (Figure 5). The bolt 19 extends through the centre portion 12, the side portion 13 and the web 5 of the bumper 1. To fasten the bumper bar 6, a nut 23 is threaded over the bolt 1 9 from the inside 22 of the bumper 1.
Adjustment of the side portions 13 relative to the centre portion 12 is effected by slotted openings 24 (Figure 6) which extend in the vehicle transverse direction, provided in the side portions 13 within the area of the connecting zones 14, the slot openings 24 receiving the threaded bolt 19 (Figure 6). For fastening the bumper bar 6, in addition to the threaded bolts 19 arranged at the connecting zones 14, further threaded bolts 19 are provided at the centre portion 12.
Within the area of the side portions 13, the retaining elements are formed by sheet metal screws 25 which are screwed from the inside 22 of the bumper 1 into sheet metal throughholes 26 provided in the side portion 13.
For optimizing the structural unit consisting of the side portions 13 and centre portions 12, apertures 27 are provided in these parts, preferably at the connecting zones 14, through which the foam forming the cover portion 7 can enter. An effective connection between centre portion 12, side portions 13 and cover portion 7 is thus established.
The bumper bar 6 is made according to the following method:
The centre portion 12 and the two side portions 13 are made in simple pressing work tools. Thereafter, the threaded bolts 19 are attached at the centre portion 12. Subsequently, the two side portions 13 and the centre portion 12 are placed into a foaming work tool with the side portions 13 overlapping the centre potion 12 so that the threaded bolt 19 extends through the slot opening 24 of the side portion 13. After alignment of the side portions 13 relative to the centre portion 12, the cover portion 7 is made by foaming-out the forming work tool, the foam effecting a secure connection between the parts 12 and 13.
Claims (7)
1. A bumper bar for a motor vehicle bumper which extends along the centre and angularly bent end sections of the bumper, the bumper bar comprising a reinforcing insert provided with a cover portion which is foamed about the reinforcing insert on all sides, and retaining members for fastening the bumper bar attached to the reinforcing insert the reinforcing insert being formed by a plurality of portions which overlap one another to form connection zones, each connecting zone having a retaining element extending through said portions which serves for the fastening of the bumper bar.
2. A bumper bar according to claim 1, wherein the reinforcing insert includes a centre portion and two side portions adjoining the centre portion.
3. A bumper bar according to claim 2, wherein the centre portion and the side portions are provided with profiles effecting a form-locking connection in the connecting zones.
4. A bumper bar according to claim 2 or 3, wherein the retaining member at each connecting zones is formed by a threaded bolt secured to the centre portion and extends through the centre portion, the corresponding side portion and a web of the bumper, the opening receiving the threaded bolt in the side portion being formed by a slot extending in the transverse direction of the vehicle.
5. A bumper bar according to any of claims 2 to 4, wherein sheet metal screws are provided as the retaining members for the side portions which are adapted to be screwed from the inside of the bumper into sheet metal through holes in the side.
6. A bumper bar according to any of claims 2 to 5, wherein apertures are provided in the centre portion and side portions at the connecting zones.
7. A bumper bar substantially as described with reference to, and as illustrated in, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843421773 DE3421773A1 (en) | 1983-07-27 | 1984-06-12 | METHOD FOR PRODUCING TAILORED STRUCTURES WITH A HIGH ASPECT RATIO IN THE 1 (DOWN ARROW) / (DOWN ARROW) AREA AND BELOW THEREFOR THE MICROELECTRONICS AND APPLICATION OF THIS METHOD FOR THE PRODUCTION OF A ROOM |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8514867D0 GB8514867D0 (en) | 1985-07-17 |
| GB2162470A true GB2162470A (en) | 1986-02-05 |
| GB2162470B GB2162470B (en) | 1987-10-14 |
Family
ID=6238168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8514867A Expired GB2162470B (en) | 1984-06-12 | 1985-06-12 | A bumper bar for a motor vehicle bumper |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2162470B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB277481A (en) * | 1926-09-03 | 1927-09-22 | Alfred James Smith | A new or improved mounting for the shock-absorbing buffers or collision guards of motor-cars and like road vehicles |
| GB625509A (en) * | 1947-08-02 | 1949-06-29 | Austin Motor Co Ltd | Improvements in bumper bars for motor vehicles |
| US3680903A (en) * | 1970-10-08 | 1972-08-01 | Mccord Corp | Protective device |
| US3841682A (en) * | 1973-06-20 | 1974-10-15 | Teledyne Mid America Corp | Vehicle bumper rub strip construction |
| US4130312A (en) * | 1977-12-08 | 1978-12-19 | Cooper Sr Robert L | Sectioned breakable vehicular safety bumper |
-
1985
- 1985-06-12 GB GB8514867A patent/GB2162470B/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB277481A (en) * | 1926-09-03 | 1927-09-22 | Alfred James Smith | A new or improved mounting for the shock-absorbing buffers or collision guards of motor-cars and like road vehicles |
| GB625509A (en) * | 1947-08-02 | 1949-06-29 | Austin Motor Co Ltd | Improvements in bumper bars for motor vehicles |
| US3680903A (en) * | 1970-10-08 | 1972-08-01 | Mccord Corp | Protective device |
| US3841682A (en) * | 1973-06-20 | 1974-10-15 | Teledyne Mid America Corp | Vehicle bumper rub strip construction |
| US4130312A (en) * | 1977-12-08 | 1978-12-19 | Cooper Sr Robert L | Sectioned breakable vehicular safety bumper |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8514867D0 (en) | 1985-07-17 |
| GB2162470B (en) | 1987-10-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |