RU2385244C1 - Metro car bogie box assembly - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to structural elements of metro car bogie frame elements. Proposed assembly comprises two crossbars and hollow side beam welded to crossbar and faces, stiffness elements, upper and lower gusset plates welded to crossbars and frame beams. Every gusset plate is welded to said beam and crossbar. Crossbar shelves are formed by section shelves. Two stiffness elements are welded to crossbars. Crossbar section elements and vertical stiffness ribs, gusset plates and angular ribs feature identical thickness.

EFFECT: higher reliability.

4 dwg

Description

The claimed invention relates to car building, in particular to structural elements of the frames of subway cars.

Known frames for carts of railway rolling stock (application UK No. 1439655, B61F 5/52, publ. 06/16/1976; application Germany No. 2607346, B61F 5/52, publ. 04.10.1979; Japan application No. 62-45108, B61F 5 / 52, published on 09.24.1987), in which each spar has a connecting element made at the same time or rigidly connected to it for mounting the cross member. Known designs of the frame of the trolleys do not have scarves in the nodes connecting the beams, are characterized by low weight compared to the trolleys of domestic production.

Their main drawback is that for the manufacture of frames, complex volumetric shapes of the connecting elements at the ends of the cross members and in the middle sections of the side beams are required. So, in the above analogue of Japan, the tubular cross-pieces are connected by welding seams with conical protrusions stamped in the middle sections of the tubular beams. The blind conical protrusions are connected by welding seams to the ends of the cross members of equal cross section. Frames of this design (see also Japanese patent No. 3262135 B2 05262225 A, B61F 5/52, claimed 03.03.1992) there are no voltage concentrators.

Closest to the claimed invention in terms of technical nature and the achieved result is the "Frame of the subway carriage truck" (RF patent No. 39560, B61F 5/52, filed April 12, 2004, Figs. 1, 5), containing two box-shaped cross members and two side hollows beams connected to two crossbars by butt welding seams, reinforcing stiffeners, upper and lower kerchiefs, lap welded to the shelves of the crossbars and widened shelves of the side beam, each of the kerchiefs with the edges of the inlets is connected by welding seams with the corner ribs welded to side beam and cross member.

A disadvantage of the known construction is that the cross member, as shown in FIG. 5 in the prototype, is welded from horizontal and side metal strips not supported by stiffeners, and has insufficient fatigue strength at the joints of the cross members with the side beam.

The technical result of the invention is to increase the reliability of the box-shaped unit of the trolley by increasing the fatigue strength of the cross members in their joints with the side beams.

The technical result is achieved by the fact that in the box unit of the subway carriage containing two box-shaped cross-beams and a hollow side beam connected by welding seams to the ends of the cross-beams, reinforcing stiffeners, upper and lower scarves, lap-welded to the cross-beams and widened shelves of the side frame beam , each of the kerchiefs with the edges of the inlets is connected by welding seams to the corner ribs welded to the beam and to the cross-member, according to the invention, the flanges of the cross-beams are formed by channel flanges connected in tyk longitudinal welds, two symmetrically located reinforcing stiffeners symmetrically spaced relative to each other are welded to the inner sides of the shelves of the end sections of the cross members, which are made flat in the form of vertical ribs, welded with longitudinal edges to the inner sides of the transverse shelves, and ends to the beam wall through end cutouts in the walls cross members closed by strips fastening the beam to the cross member by means of welding seams, profile elements of which and vertical stiffeners, scarves and corner ribs in the compounds of the box assembly are of equal thickness.

The technical result is expressed in the following.

Butt joint with longitudinal welds of channel shelves simplifies the manufacture of box-shaped cross members for trolley frames.

Placing reinforcing stiffeners inside each end section with a symmetrical arrangement relative to each other and making them flat in the form of vertical ribs welded with longitudinal edges to the inner sides of the shelves, and ends to the side beam wall, will increase the rigidity of connecting the side beam to each cross member.

The execution of end cutouts in the walls of each cross member at its base will allow the internal vertical ribs of the cross members to be connected with the side beam with welding seams 18. This will eliminate stress concentrators in the box nodes.

The use of the same thickness of the cross-section profile elements, vertical stiffeners, kerchiefs and corner ribs in the box unit joints will increase the reliability of connecting the side beam with the cross-members and reduce the laboriousness of manufacturing the frame for the subway carriage.

Figure 1 shows a side view of the connection of the side beam with a cross member;

figure 2 is a plan view;

figure 3 is a section along aa;

figure 4 is a section along BB.

The box-shaped unit of the subway carriage contains two box-shaped cross-beams 1 and a hollow side beam 2 of rectangular cross section, connected by welding seams to the ends of the cross-pieces, reinforcing stiffeners 3 and 4, upper 5 and lower 6 kerchiefs (Fig. 1), lap welded to the cross-bar shelves and widened shelves 7 and 8 (figure 2) of the side beam of the frame, located symmetrically relative to the axis of symmetry 25 of the crossbars (figure 2).

Each of the scarves 5 and 6 with the edges of the inlets 9 and 10 (Fig. 4) is connected by welding seams to the corner ribs 11 and 12 (Fig. 3), welded to the beam 2 of the frame and to the cross member 1.

The shelves of the cross members are formed by the shelves 13 (Fig. 4) of channels, which are butt-joined by longitudinal welds 14.

Two reinforcing stiffeners symmetrically spaced relative to each other are welded to the inner sides of the shelves of the end sections of the cross members, which are made flat in the form of vertical ribs 15 and 16 (Fig. 4), welded with longitudinal edges to the inner sides of the transverse shelves by welding seams 17 (Fig. 4) and the ends to the side beam wall with welding seams 18 (FIG. 3) through the end cutouts 19 provided in the walls 20 of the cross members, sealed with straps 21 fastening the side beam 2 through the welds to the cross members 1.

Cross-section profile elements with vertical stiffeners, kerchiefs 5 and 6 and corner ribs 11 and 12 in joints between each other have equal thickness.

The kerchiefs 5 and 6, the ribs 11 and 12, and the walls 20 of the cross members in connection with the ribs 11 and 12 form box-like nodes at the angles of convergence of the side beams with the cross members.

In the cross members of the frame there are places for mounting traction motors.

Assembly of the node is as follows.

Vertical stiffeners are welded to the inner sides of the shelves of the bent channels, after which the shelves of the channels are welded by longitudinal butt welds 14 to the box-shaped cross.

The welding of vertical stiffeners with the wall 22 of the side beams is carried out using provided in the walls, at the base of the cross members of the end cutouts. Before assembling the subsequent connecting elements of the box-like assembly, the end cut-outs 19 are welded with trims 21 fastening the side beam with welding seams 23 and 24 to the cross members.

Claims (1)

The box unit of the subway carriage containing two box-shaped cross-beams and a hollow side beam connected by welding seams to the ends of the cross-beams, reinforcing stiffeners, upper and lower scarves, overlapped to the shelves of the cross-bars and widened shelves of the side frame of the frame, each of the scarves is connected with the edges of the inlets welding seams with angular ribs welded to the beam and to the cross member, characterized in that the shelves of the cross members are formed by channel shelves connected end-to-end by longitudinal welding seams to the inner two reinforcing stiffeners symmetrically spaced relative to each other are welded to the sides of the shelves of the end sections of the cross members, which are made flat in the form of vertical ribs, welded with longitudinal edges to the inner sides of the shelves of the cross member, and end faces to the wall of the side beam through end cutouts in the walls of the cross members, sealed with strips, securing the side beam to welders through welds, profile elements with vertical stiffeners, scarves and corner ribs in box joints la have equal thickness.

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