MXPA98006677A - Mechanism for balance control for bogie with motion oscila - Google Patents

Abstract

The present invention relates to a rail car bogie, characterized in that it comprises: a pair of side frames stamped on axle structures and associated wheels for transverse oscillating movement of the bogie under the action of laterally directed forces that are applied to the bogie, each frame has a cross-member receiving opening, a cross-member extending between the side frames, each end of the cross-member is received in the opening of a respective lateral frame for movement of the cross-piece transversely to the side frame, a strap extending between the frames lateral and in interlocking relationship to limit the transverse oscillating movement of the side frames, a lateral crossbeam stop extending from the crossbeam adapted to transmit lateral forces from the crossbeam to the stay, a lateral stay stop extending from the stay adapted to be connected by the crossbeam stop to limit m lateral movement of the crossbeam and transmit lateral forces from the crossbeam to the stay, the stay stop defines an upper edge surface, a lower edge surface and a convex contact surface extending between the upper edge surface and the surface lower edge, the convex contact surface includes a contact point, the contact point is adapted to be coupled by the stopper

Description

MECHANISM FOR BALANCE CONTROL FOR BOGIE WITH OSCILLATING MOVEMENT AWTBCgPPfTES PB & INVENTION The present invention is directed to an optimized balancing control mechanism, for a railway wagon with oscillating movement as described in US Patents. Nos. 3,461,814 and 3,670,660. The railway wagon structures with oscillating movement described in the above-identified patents have proven extremely successful and have a well-proportioned degree of operational efficiency that had not previously been achieved. The oscillating movement bogie is designed to reduce the critical speeds at which the periodic track disturbances can cause resonance conditions with the spring loaded car body and thus an uncontrolled pursuit of the car body. One objective of the design of the railway bogie with oscillating movement was to provide a railway car that had incorporated positive means to verify and control excessive rolling amplitudes of an associated body. The design was also to provide a bogie for use in a high capacity, high center of gravity rail freight car, the type in which a side brace that extends from the brace interconnects with the side frames to limit rocking. the side frames transversely of the bogie excessively where the effect of the forces applied to the bogie side bumper stop are reduced to provide safe operation of the car. The swing control feature of the oscillating movement bogie works on the basis of reducing the overturning moment imposed on the bogie not springing by the rolling car body. In a standard cargo bogie, the lateral translation of the body forces of the rolling car forces the upper crossbeam retainers against the side frame columns at an average height of approximately 51.44 cm (21 1/4") from the top of the rail (TOR) The closed sleeper retainers help stop further swinging movement of the sleeper-body structure of the car with a lateral force imposed at 51.44 cm (21 1/4") from the top of the rail. This structure provides a tipping moment, which is equal to 51.44 cm. (21 1/4") multiplied by the lateral force, which can unload or even lift the wheel by detaching it from the rail on the opposite side of the bogie The oscillating movement bogie as described in the above patents does not have a top sleeper retainer but it has lateral stops on the bottom of the crossbar and the stay, with this construction, even with the inclination of the crossbeam with respect to the stay that is minus 2.2 °, due to a compression of 3.82 cm (1 1/2") of loading springs on one side of the bogie and 3.81 cm (1 1/2") extension of loading springs on the other side of the bogie, the lateral force applied to the bogie without springs is at a level of 29.53 cm (11.5 / 8") on top of the rail. This results in a much smaller rollover moment, which is 29.53 cm (11 5/8") multiplied by the lateral force, than in the standard bogie having sleeper retainers.The present invention provides a further improvement .. COMPENDIUM OF THE INVENTION The present invention is directed to a railroad bogie comprising a pair of side frames having a cross member extending between them, and a member without springs wherein the side frames are supported oscillatingly at the ends of the bogie axles, so such that the frames can function as oscillating hangers on the non-sprung member extending between and interconnecting the frames to limit and finally stop the oscillating hanger type action of the frames.The lateral forces of the sleeper are applied to the side frames in a site disposed substantially below the level of both the lateral axle-frame oscillating connection and the crossbar for ducing the tipping moment to maintain sufficient amount of vertical load on the wheels of the bogie to avoid lifting the wheels. The point at which the lateral load is applied to the side frame, is determined by the point of contact in a front wall of a lateral stop of the tie. The reduced point of contact in the lateral stop reduces the tipping moment during carriage roll, at minimum. This invention optimizes the use of side stops used to reduce the tipping moment imposed on the bogie without springs by the rolling car. BRIEF DESCRIPTION OF THE DRAWINGS Figure IA is a side elevational view of a railway bogie with oscillating movement, having a constant damped configuration. FIG. IB is a partial side elevational view partially illustrated in cross section of an oscillating motion railway bogie having a variable damped configuration. Figure 2 is a fragmentary plan view, partially in section, taken on line 2-2 of Figure IA. Figure 3 is a fragmentary end view, partly in section, taken on line 3-3 of Figure 2, showing the side tie stop of the present invention. Figure 4 is a fragmentary end view, partially in section, illustrating a side tie stop of the prior art. Figure 5 is a top plan view of the side tie stop of the present invention. Figure 6 is a side elevation view of the side tie stop. Figure 7 is a front elevation view of the side tie stop. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Figure IA shows a bogie with oscillating movement having a constant damped configuration as described in U.S. Pat. No. 3,461,814.

Figure IB shows a bogie with oscillating movement having a variable damped configuration as described in US Pat. No. 3,670,660. The present invention can be employed in connection with both of these oscillating movement bogies. Common elements of the bogies as illustrated in Figures IA and IB refer to common reference numbers. Each of the bogies of Figures IA and IB comprises a side frame 10 having a tension member 12 and a compression member 14. The members 12 and 14 are fused at the joint 16 to provide a pedestal jaw 18, for receiving an adapter 20 and a bearing structure 22 receiving a trunnion of a wheel and axle structure 24. An aperture for receiving cross-member 26 is located at the center of the side frame 10. The openings 26 receive one end of the cross-member 28 arranged with its transverse longitudinal axis to the length of the frame 10. It will be understood that while only one side frame 10 has been shown in the drawings, there is a similar side frame on the other side of the railroad bogie which cooperates with the sleeper and other parts of the frame. Bogie similarly. As illustrated in Figure 3, the tension member 12 includes the U-shaped base portion 30 for partial seating of an oscillating seat 31. The oscillating seat 31 comprises an elongated plate section 32 and a reinforcing member in the form of inverted inverted T 33. The elongated plate 32 provides a seat for supporting the end of a strut 34. The oscillating seat 31 provides a stop surface 37 for supporting a channel-shaped end of the strut 34 arranged with its transverse longitudinal axis to the length of the frame 10 and parallel to the axis of a sleeper 28. The tie 34 is interconnected to the oscillating seat 31 by bolts 39 which extend through openings in the swing seat 31 and tie rod 34 and / or sealing fitting which is they extend from the upper surface of the oscillating seat 37 through openings in the tie that thus connect the two side frames 10 to each other. A group of springs 40 is disposed between the tie 34 and the tie 28 to resiliently support the end of the tie 28. The excessive oscillation of the side frames 10 in either positive or negative lateral direction is stopped by contact between the bottom surface 41 of the oscillating plate 32 and the upper surface 42 of one of the side walls 44 of the base portion 30 of the tension member 12. The crossbeam 28 as illustrated in Figure 3, is generally constructed in a box shape with each end that comprises side walls 46a and 46b. Upper and bottom walls spaced 48 and 50 structurally join side walls 46a and 46b. A vertical central wall 52 joining the upper and bottom walls 48 and 50, reinforces the sleeper ends. As seen in Figure 3, a relative transverse movement of the crossbeam 28 with respect to the side frames 10 is limited by a pair of horizontally spaced crossbeam stops 54 (only one illustrated) which are disposed on the longitudinal axis of the crossbeam 28. Each crossbeam stop 54 depends from a bottom wall 56 of the crossbeam 28 and is in opposite spaced relationship with a side tie stop 58 carried by the stay 34 at its ends. Each engaging tie stop 54 and side tie stop 58 are spaced apart to provide spacing therebetween to allow limited lateral movement of the crosspiece 28 transversely of the bogie in addition to lateral movement generated by oscillation of the frames 10. The coupling between each tie stop Cooperator 54 and Side Brace Stop 58 will occur at a level substantially below the horizontal plane XX (shown in Figure IA) and the horizontal plane X '-X' (illustrated in Figure IB) containing the oscillating connection that is defined between the adapter 20 and the pedestal jaw 18. That type of connection normally allows the side frame 10 of the bogie to oscillate transversely. The crosspiece stop 54 comprises a U-shaped member 60 best illustrated in Figure 2 with a transversely projecting wall., vertical 62, facing the adjacent end of the crossbeam 28. In the assembled position of the bogie, the stay 34 is provided with an opening 64 that projects longitudinally therein to receive the crossbeam stop 54. At the outer end of the opening 64 there is a convex coupling surface 66, best illustrated in Figure 6, of the side tie stop 58 in opposite relation to the engagement surface 68 of the tie stop 54. As seen in Figure 2, the surface of coupling 66 is supported and reinforced by the support members such as the ribs 70. Each rib 70 includes a lower surface 71 which is in contact with the spring seat of the strut 35. Figure 4 shows a bogie with oscillating movement of the technique prior, having a side tie stop 158 with a flat vertical mating surface 166. Having said surface 166 on the side tie stop 158, causes the lateral force F which is applied by a crossbeam stop 154 to the shoulder of the stay 158 is concentrated in the upper part 168 of the shoulder stop coupling surface 166, when the crossbeam stop 154 makes lateral contact with the stop coupling surface of the crosspiece. tie rod 166. The force F and the stop 168 of the mating surface of the tie stop 166 are located at a distance "Y" above the top of the rail 74. Figure 3 shows an oscillating movement bogie having a stop of side brace 58 with a contact wall having a cylindrical convex contact surface 66 (also shown in Figures 5 to 7). The side tie stop 58 includes an upper edge surface 67A and a lower edge surface 67B. The contact surface 66 extends between the upper edge surface 67a and the lower edge surface 67B. The shape on the contact surface 66 causes the lateral force F transferred from the crossbeam stop 54 of the crossbeam 28 to be concentrated at the outermost point or tip 72 of the convex contact surface 66. The contact line between the crossbeam stop 54 and the stop of the brace 58 at the tip or contact point 72, is located approximately at the same vertical level as the bottom of the faces of the loading springs in the group of springs 40, which is at the same vertical height than the upper part of the spring seat 35, a distance "X" over the top of the rail 74. The distance X is less than the distance Y and is equal to approximately 24.45 cm (95/8"). The contact line will be on the cylindrical convex contact surface 66 of the side tie stop 58. The radius of the cylindrical contact surface 66 is centered on the upper part of the spring seat of the tie 35 and the bottom surface 71 of the lanyard 70. The upper and bottom contact surfaces 67A and 67B recede at an angle of at least 7o away from the crossbeam stop 54 and toward the nearest side frame 10. In comparison with the front stop of the prior art 158 which has a flat lateral taper contact surface 166, where the lateral force F is applied at an upper height from the top of the rail 74 to the slightest inclination of the cross-member, this bogie has a shoulder stop 58 with a surface of convex contact 66, presents a reduction in height on the upper part of the rail 74 where the lateral force F is transferred, thus reducing the moment of tipping the bogie. Various characteristics of the invention have been shown and described particularly in connection with the embodiment illustrated in the invention, however it will be understood that these particular structures simply illustrate, and that the invention shall be given its fullest interpretation within the terms of the attached claims.

Claims (11)

1. CLAIMS 1.- A railway wagon bogie, characterized in that it comprises: a pair of side frames stamped on axle structures and associated wheels for transverse oscillating movement of the bogie under the action of laterally directed forces that are applied to the bogie, each frame has a receiving aperture of sleeper; a cross member extending between the side frames, each end of the cross member is received in the opening of a respective side frame for movement of the cross member transversely to the side frame; a brace extending between the side frames and in interlocking relation to limit the transverse oscillating movement of the side frames; a lateral crossbeam stop extending from the crossbeam adapted to transmit lateral forces from the crossbeam to the stay; a side tie stop extending from the tie adapted to be contacted by the tie stop to limit lateral movement of the tie and transmit lateral forces from the tie to the tie; the tie stop defines a top edge surface, a bottom edge surface and a convex contact surface extending between the top edge surface and the bottom edge surface, the convex contact surface includes a point of contact, contact point is adapted to be coupled by the crossbeam stopper.
2. 2. - The railway car bogie according to claim 1, characterized in that the convex contact surface defines a cylindrical surface in which the contact point is located.
3. 3. - The railway wagon bogie according to claim 1, characterized in that the strut includes a spring seat of the strut, the contact point is centered on the spring seat of the strut.
4. 4. - The railway wagon bogie according to claim 1, characterized in that the upper edge surface is arranged at an angle of at least 7 ° with respect to the sleeper stop.
5. 5. - The railway wagon bogie according to claim 4, characterized in that the lower edge surface is arranged at an angle of at least 7 ° with respect to the sleeper stop.
6. 6. A tie stop for use with a rail car bogie having a tie rod, a crossbar and a crossbeam stop, the tie stop is characterized in that it comprises: a contact wall having a convex contact surface, the The convex contact surface includes a tip adapted to contact the tie stop to limit lateral movement of the tie, and a support member connected to the contact wall, the support member is adapted to engage the tie.
7. 7. - The tie stop according to claim 6, characterized in that the contact wall includes a top edge surface and a bottom edge surface, the convex contact surface extends between the top edge surface and the top surface. bottom edge.
8. 8. - The tie stop according to claim 7, characterized in that the upper edge surface is arranged at an angle of at least 7 ° to a line tangent to the convex contact surface at the tip.
9. 9. - The tie stop according to claim 7, characterized in that the lower edge surface is arranged at an angle of at least 7 ° to a line tangent to the convex contact surface at the tip.
10. 10. - The strut stop according to claim 6, characterized in that the support member includes a bottom surface adapted to engage the strut, the tip of the convex contact surface is located generally coplanar with the bottom surface of the support member .
11. 11. - The tie stop according to claim 6, characterized in that the convex contact surface is generally cylindrical.