SK283988B6 - Underframe front part and deformation element on vehicles, especially rail vehicles - Google Patents

Abstract

Underframe structure and deformation element on rail vehicles With the using up of the stroke of the coupling (10), the failure of a wear element (11), and the receding of the coupling into the coupling sleeve, load is directed through two deformation elements (1) side-mounted on the underframe (4). The deformation elements are attached to the underframe by a mounting plate (18). The enclosed casing (14) is built onto the underframe and has only one opening (15) for the coupling.

Description

Technical field

The invention relates to the front side of a chassis of a vehicle, in particular a rail vehicle, as well as to a deformation element which can be installed, for example, in the front extension of the chassis.

BACKGROUND OF THE INVENTION

It is known that, in addition to improving the high active safety of the system, rolling stock operators are increasingly demanding improved passive vehicle safety.

One possibility of a safety-oriented design is to create deformation zones. These are preferably arranged outside of the load-bearing structure itself to allow for low-cost repair and to protect the vehicle and the occupants from the effects of collisions caused by accidents. Devices that meet these requirements are known as collapsible pipes that are folded under overload, as extension pipes with movable plastic joints, and also as absorbent pads with aluminum honeycombs.

In EP 0621416 A1 a device is proposed which has been implemented in a two-floor TGV SNCF and consists in consistently dividing the vehicle body into controlled deformable areas and vice versa, resistant security areas. The controlled deformation is achieved by various variants of hollow profile formation.

The energy absorption profile of the profile can be compared to that of steel cabinets, whereby energy absorption and deformation stability are improved over a single hollow cabinet with special cross sections.

Various efficiency parameters are used to evaluate such energy absorbing components according to the following scheme:

^{with 5} degree of utilization

A.E .--- 100 [7.1

F _x ' ^{1 J} degree of compression

U

s.e.- - la

Here they mean:

F pressing force

F _max peak pressure value

Fpriem mean pressure force

A.E. Crush Force Efficiency = degree of utilization E = FdS deformation work

Emaxteor theoretical (ideal) deformation work

With compression path

Sma, maximum compression path

SE Stroke Efficiency = degree of compression l _s length of compression l ₀ default length

The following properties are desirable:

high grade A.E. use:

high grade S.E. compression;

resistance to vertical loads (load-bearing capacity, deformation stability and protection against rolling up);

low space requirement (installation space); low weight;

minimum cost / construction / maintenance cost.

In particular, honeycomb structures are characterized by almost ideal utilization parameters (A.E., S.E.) as well as low weight, but they cannot perform the supporting function alone. Therefore, aluminum honeycombs in conjunction with a telescopic type guide are offered as absorbent pads. Profiles, such as hollow cabinets, can withstand common loads, but generally have lower utilization rates, respectively. disadvantageous ratio between working stroke and construction length (degree of compression). The weight-to-power ratio is often unsatisfactory.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a bogie front extension with a deformation zone, as well as an easily replaceable component of this type for such deformation zones, the combination of suitable properties overcoming the disadvantages of known solutions. This object is achieved according to the invention by the features of the claims. Advantages of the present invention over known devices are advantageous degrees of utilization and compression, as well as a favorable weight-to-power ratio. The device can be easily manufactured from DIN blanks.

BRIEF DESCRIPTION OF THE DRAWINGS

An exemplary embodiment of the present invention is illustrated in more detail by means of the drawings. The drawings show:

Fig. 1 to FIG. 3 shows various variants of the shape of the housing, FIG. 4 to FIG. 6 shows various cross-sectional variants, FIG. 7 is a top view of the end of the bogie front, FIG. 8 shows a side view of a deformation element with a trigger and partitions, FIG. 9 shows a section through a deformation element with a core and interlayers, FIG. 10 shows a section through a deformation element with a mounting plate.

DETAILED DESCRIPTION OF THE INVENTION

According to FIG. 1-3, the cores 3 can be covered by various known sheath shapes. The cross-sections of the cores 3 can also be of different design, in a known manner (FIGS. 4 to 6). The housing 2 may consist of various parts which are joined in a known manner. In the arrangement of FIG. 7, the clutch stroke 10 has been exhausted, the tear-off elements 11 have failed, and the clutch 10 has been deflected back into the clutch shaft 12 by a load guide through two deformation elements 1 laterally arranged on the chassis 4 in the bumper position. The bogie 4 is offset from the coupling plane rearward by the stroke of the clutch 10 and the length of the deformation elements 1. At the front of these deformation elements 1 are profile plates 13 in order to prevent vertical relative displacements of the vehicles during the collision.

The whole device is located behind the cover 14, which has only a hole 15 for the coupling 10. The deformation elements 1 according to FIG. 8 to 10 consist of correspondingly edged (provided edges) U-shaped sheets, which are welded to the casing 2 in the form of a hollow box by means of an intermediate sheet metal strip 7. At the same time, the sheet metal 7 improves the deformation work E, grade A.E. utilization and ability to carry vertical loads. The front side is closed by a welded plate 16 having holes 17 for attaching the profile plate 13. At the rear end, the housing 2 is provided with a mounting plate 18 for attachment to the chassis 4.

SK 28388 B6

In order to improve the degree of A.E. For this purpose, the trapezoidal part of the sheet surface is replaced by an external welded sheet having about half the thickness of the sheet metal of the sheet 2. the surface of the housing 2, compared to a rectangular or square trigger, a more uniform compression curve. The compartments 8 welded transversely to the load direction promote uniform folding. Upon impact, the casing 2 deforms throughout its cross-section in the rhombic ripple mode typical of hollow cabinets of these dimensions. To improve grade A.E. for use, inside the housing 2 there is a core 3 of polycarbonate tubular honeycomb blocks. This has considerably more favorable purchase price, high aging resistance and corrosion resistance over the aluminum hexagonal honeycomb structures used. E.A parameters are comparable. The height of the individual blocks corresponds approximately to the length of the folding wave (depth of the warehouse). The interlayers 9 as pressure plates of hardened fabric prevent unwanted failure in the impact area of the blocks.

The degree of utilization (A.E.) of the deformation element 1 is about 80%, the maximum degree of compression is about 70%.

It is conceivable and within the meaning of the invention that the deformation element is also used in areas other than the chassis attachment described above.

Claims (9)

PATENT CLAIMS 1. Chassis end-piece of vehicles, in particular rail, with at least one deformation element for collecting kinetic energy in collisions, characterized in that two deformation elements (1) for guiding the load after exhaustion of the clutch stroke (10), failure of the tear element ( 11) and the deflection of the clutch (10) rearwardly into the clutch shaft (12) are laterally arranged on the bogie (4) and secured thereto by the mounting plate (18), the bogie (4) being provided with a closed cover (14). Chassis front extension and deformation element according to claim 1, characterized in that the cover (14) has only one opening (15) for the coupling (10) and outer profile plates are arranged on the cover (14) in the region of the plates (16). (13). 3. A deformation element consisting of a filled carrier sheath, characterized in that the closed-on compact metal shell (2) is filled with an additionally inserted, in the defined direction of impact, an energy-absorbing material as core (3) and as a deformation element (1). 1), preferably absorbing work, is connected to the chassis (4), which is preferably carrying. The deformation element according to claim 3, characterized in that the core (3) consists of mutually connected longitudinal tubes. The deformation element according to claim 3 and 4, characterized in that the metal shell (2) in the form of a hollow box consists of bent U-shaped sheets with connections (5) which are connected by sheet metal strips (7). The deformation element according to claims 3 to 5, characterized in that the housing (2) has a starter (6) in the front part. The deformation element according to claims 3 to 6, characterized in that the housing (2) is provided with partitions (8). The deformation element according to claims 3 to 7, characterized in that the core (3) consists of at least one block, and in a plurality of blocks, these are separated by intermediate layers (9) as active pressure plates. A deformation element according to claim 8, characterized in that the height of the individual blocks corresponds approximately to the length of the folding wave and the hardened fabric interlayers (9) remain in the impact area of the blocks.