Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
  • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
  • B61F5/50—Other details
  • B61F5/52—Bogie frames

Definitions

• the invention relates to railway transport and relates in particular to the construction of a side frame of a railway carriage.
• Inclined belts like vertical columns, have a trough-shaped cross section, with some bending inside the ends of the shelves, and the lower and upper belts have a box-shaped cross section. Box ends with outer and inner jaw guides are located at the ends of the side frame. The internal jaw guides are associated with the middle elements of the inclined frame belts [USSR Author's Certificate Zh768683, B61F 5/52].
• the disadvantage of this frame design is the cracks observed during operation in the interface between the vertical columns and the lower belt, the development of which can lead to the destruction of the frame.
• the causes of increased stresses in the indicated zone are the execution of the axle box opening of the frame, which has a large width required to accommodate the axle box of the trolley, as well as the coincidence of refraction of the upper belt into the over-axle zone with a vertical plane passing through the conjugation zone of the inclined belt-axle opening.
• the frame consists of a lower horizontal belt, an upper belt with ends bent upward, having a sectional shape of a tee, interconnected by vertical columns, forming a spring opening.
• the lower belt is connected with inclined belts, which, together with the ends of the upper belt bent upwards, flow into the axle openings.
• the inner jaw guides of the latter are made in the form of L-shaped brackets poured into the lower shelves of the inclined belts.
• U-shaped stiffeners which are simultaneously guides for the cart's triangels.
• the I-beam cross-sectional shape of the frame has significant disadvantages that arise during operation.
• this cross-sectional shape does not provide the necessary rigidity of the frame in the axle box area. openings when the trolley enters the curve, like the whole structure as a whole, poorly working in torsion.
• the cross section in this section of the frame will be further weakened, since fastening will be possible with at least two screws.
• This design is selected as a prototype.
• the use of a spring kit with a large number of springs required the design of the lower frame to be wider in the prototype design, moreover, in the lower belt, along its length, a central stiffening rib was made and, as a result, an increase in the mass of the frame.
• the ribs installed in the cavity of the frame in the mating zone of the lower belt with inclined belts give excessive rigidity to the frame in the specified zone, increasing its metal consumption.
• the task to which the claimed invention is directed is to create a design of a side frame of a railway carriage having increased reliability by redistributing stresses and reducing stress concentration in critical places of the frame observed during operation.
• the problem is solved as follows.
• the lower corner of the spring aperture of the side frame is made in the form of a stepwise transition of the vertical column of the frame to the lower horizontal belt, along with this, the upper surface of the transition is a continuation of the bridge, poured into the flange of the technological holes of the frame, and goes into the limiters of the Wedge spring, the outer surface of which repeats the configuration of the transition of the side wall of the lower belt to the side wall of the inclined belt.
• the transition of the side wall of the lower belt to the side wall of the inclined belt is made using conjugated radii, and one of the mating radii of the transition has a center that coincides with the center of the bonnet of the wedge spring.
• a U-shaped jumper is formed along the contour of the jaw guide with an inclined belt, forming an opening in the inclined belt.
• the refraction of the upper horizontal belt and the vertical side surfaces of the frame in the over-box zone coincides with the transverse reference plane of the reference tide of the inner jaw guide.
• Supporting tides are made on the vertical side walls of the frame in the over-box zone, the outer surfaces of which located at an angle to the horizontal bearing surface of the axle box opening.
• the side frame of the railway carriage is made in the form of a steel casting, consisting of upper and lower horizontal belts interconnected by vertical columns, forming together with horizontal belts a spring opening, in the lower part of the spring opening there is a supporting surface with bonks for installation and limiters against displacement of the springs, inclined belts, conjugated with the lower belt and the horizontal supporting sections of the axle openings having nye and internal jaw guide.
• a U-shaped jumper is made, forming a hole in the inclined belt.
• the lower corner of the spring opening is made in the form of a stepped transition of the vertical column of the frame to the lower horizontal zone, along with this, the upper surface of the transition is a continuation of the bridge, poured into the flange of the technological holes of the frame and goes into the limiters of the wedge spring, the outer surface of which repeats the configuration - otsion made using the conjugated radii of the transition of the side wall of the lower belt to the side wall of the inclined belt.
• One of the mating radii of the transition of the side wall of the lower belt to the side wall of the inclined belt has a center that coincides with the center of the bonnet of the wedge spring.
• FIG. 1 is a General view of the side frame of a railway trolley, with a cut along the longitudinal plane; figure 2 is a top view of the side frame; fig.Z is a bottom view of the side frame; FIG. 4 is a sectional view of the over-box area along line AA of FIG. I; 5 is a perspective view of a side frame with a section.
• the side frame consists of upper 1 and lower 2 horizontal belts, interconnected by vertical columns 3, forming together with horizontal belts 1 and 2, a spring opening 31.
• the lower belt 2 of the frame goes into its inclined belts 4, the middle elements 5 of which are paired with horizontal supporting sections 11 of the axle box openings 6.
• Each axle box 6 consists of an inner 7 and an outer 8 jaw guides with supporting flanges 9, and an over-box zone 10.
• the inner jaw guide 7 is inclined with the middle element 5 of the fourth belt 4, having in its cross section, like the vertical columns 3, a trough-shaped shape.
• a U-shaped jumper 14 is made along the contour of the jaw guide 7 with the inclined belt 4, forming a hole in the middle element 5 of the inclined belt 4.
• the lower 2 and the upper I belt, as well as the over-slip zones 10 are box-shaped in cross section.
• the cross-section of the over-box zone 10 decreases in height and width towards the outer jaw guide 8.
• the side walls 15 of the upper belt 1, the side walls 16 of the lower belt 2, as well as the side walls 17 of the inclined belts 4 are parallel to the longitudinal plane of the frame.
• the side walls 18 of the vertical columns 3 together with the side walls 17 of the inclined belts and the side walls 15 of the upper horizontal belt 1 form two common vertical side surfaces 19 of the frame, in which the technological holes 20 are made, having an inner 21 and an outer 34 in its contour flanging.
• the refraction lines 22 of the upper horizontal belt 1 and the side surfaces 19 of the frame in the over-box zone 10 coincide with the transverse reference plane 23 of the reference tide 9 of the inner jaw guide 7.
• a supporting surface 24 for accommodating the spring set of the trolley, on which the castors 25 for installation and the stops 26 from the bias of the springs, including the legs 28 and the limiters 27 of the wedge springs, are cast.
• the lower corner of the spring opening 31 is made in the form of a stepped transition 33 of the vertical column 3 of the frame into the lower horizontal belt 2.
• the upper surface 29 of the transition 33 is a continuation of the bridge 30 poured into the flange 21 of the technological holes 20 made in the side surfaces 19 of the frame.
• At the edges of the stepped transition 33 its upper surface 29 is poured into the limiters of the Wedge spring 27.
• the outer surface of the limiter of the Wedge spring 27 repeats the configuration made with the help of the interconnected radii Rl and R2, the transition of the side wall 6 of the lower belt to the side wall 17 inclined belt.
• Radius Rl has a center that coincides with the center of the bonnet 28 of the wedge spring.
• the U-shaped jumper in the joint zone of the internal jaw guide with an inclined belt forming a hole in the inclined belt, also allowed to redistribute and reduce the stresses arising in the interface zone of the horizontal supporting section of the axle box opening with the inclined belt, without significantly increasing the mass of the frame.
• the execution of the outer surfaces of the supporting tides located on the vertical walls of the frame in the over-axle zone, at an angle to the horizontal supporting surface of the axle box increases the area of support of the side frame on the axle box of the trolley and additionally stabilizes the position of the wheel pair in the axle box of the side frame.
• the stepwise transition of the vertical column to the lower horizontal zone made it possible to redistribute existing stresses and reduce the level of stress concentration in the zone of the lower corner of the spring opening.
• transition of the side wall of the lower belt to the side wall of the inclined belt in the form of radii conjugated to each other, provides a smooth connection of these load-bearing frame elements without the occurrence of stress concentrators in the transition zone.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Body Structure For Vehicles (AREA)
• Train Traffic Observation, Control, And Security (AREA)

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Citations (4)

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• 2006
  • 2006-07-10 RU RU2006124689/11A patent/RU2323843C1/ru active
• 2007
  • 2007-08-23 CZ CZ2009-72A patent/CZ306777B6/cs not_active IP Right Cessation
  • 2007-08-23 WO PCT/RU2007/000459 patent/WO2008013480A1/ru not_active Ceased
  • 2007-08-23 UA UAA200814888A patent/UA92086C2/uk unknown
  • 2007-08-23 CN CN200780026037XA patent/CN101500876B/zh not_active Expired - Fee Related

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