JP2000318607A - Central clamp assembly of frame-brace rolling stock carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the fatigue-preventive property of the welding part between the clamp plates and the struts, and to reduce the stress. SOLUTION: A bolster is extended between side frames so as to support a car body. A brace connected to the side frames, and to suppress the relative movement in the longitudinal direction between the side frames, includes a pair of struts 18 and 20 which are connected at the side where the center lines of the side frames are opposed in the diagonal line form. A clamp assembly 30 installing the struts which are crossed at the center of the side frames includes a pair of clamp plates 32, and each plate has a groove formed and made suitable to receive the strut. Each groove ends at the opposing end of the clamp plate, and has an opening 48 with almost U-shape, and each clamp plate is welded to the strut along the opening 48. The opposite surfaces of the clamp plates 32 are connected by contacting directly, and welded. This clamp plate assembly suppresses the relative movement between the struts in almost a horizontal surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to Standard R, Park Ridge, Illinois, the assignee of the present application.
search and Design Corpor
U.S. Pat. No. 4,570,544 assigned to U.S. Pat.
Nos. 5,243,920 and 5,584,250 relate to a railcar bogie with frame brace.

[0002]

In U.S. Pat. No. 4,570,544, diagonal braces or struts interconnecting side frames have shackles 66 at their intersections.
Held together by In U.S. Pat. No. 5,243,920, struts are interconnected at their intersections by a clamp plate assembly consisting of two clamp plates each having a groove and an elastomeric pad between the clamp plates and the opposing surfaces of the struts. You. There are fasteners that hold the clamp plate together.

[0003] In US Patent No. 5,584,250,
The clamping plates are welded to the frame brace struts, and the clamping plates are welded together. The interconnect was significantly enhanced by this welded assembly, but the weld was located in areas of high residual stress.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a frame brace trolley that uses a pair of cross struts to stabilize the trolley and improve resistance to relative longitudinal movement between side frames.

It is a primary object of the present invention to provide an improved and substantially enhanced clamp assembly for mounting cross struts between side frames.

Another object is to provide a clamp assembly of the type described which uses a unique geometrical shape for the weld between each clamp plate and strut and increases the fatigue resistance of the welded shape. To provide.

Yet another object of the present invention is to use a U-shaped weld between the clamp plate and the strut, the weld being closer to the neutral axis of the lateral bending load and thus the weld. Stress is reduced. Other objects are set forth in the following specification, drawings and claims.

[0008]

SUMMARY OF THE INVENTION The present invention provides for each strut by providing a U-shaped cut at each end of the clamp plate groove and welding the struts to the clamp plate along the edges of the U-shaped opening. The configuration of the weld between the and the clamp plate.

To achieve the above object, a bogie according to the present invention comprises a longitudinally spaced wheel set and a pair of laterally spaced wheels extending between and supported by the wheel sets. With the side frame that you put,
A bolster extending between the side frames and supporting a vehicle body;
A brace for restraining relative longitudinal movement between the frames, wherein the brace is inclined opposite to the longitudinal axis of the bogie, and each extends between the frames; A pair of struts intersecting generally at the center of the frame and a clamp assembly for attaching the struts at the intersection thereof, the clamp assembly including a pair of clamp plates, each plate having a generally parallelogram configuration And each having a generally central groove formed and adapted to receive a strut, each clamp plate groove terminating at an opposing end of the clamp plate, and each clamp plate groove end generally having a U
Each clamp plate has a U-shaped opening, each clamp plate is welded to a strut along its U-shaped opening, and a fixing means is mounted with the opposing surfaces of said clamp plates in direct contact with each other.

Further, in the truck according to the present invention, each clamp plate may be welded to the strut at a position spaced along each clamp plate groove.
In the area of the clamp assembly, the strut has a somewhat flat surface on one side and an irregular surface on the other side of the strut, the generally flat surface being welded to the clamp plate at a U-shaped opening. Is also good.

Also, the clamp plates may be welded together along their adjacent sides to restrain relative movement between the struts in a generally horizontal plane, the groove intersecting the two securing means. May be located one on each side, each plate having a long axis and a short axis, and the plate groove extending along the long axis.

[0012]

DETAILED DESCRIPTION OF THE INVENTION US Pat.
A railcar bogie is disclosed having a pair of side frames supported on a conventional longitudinally spaced wheelset. Cross struts extend between the side frames to improve the stability of the bogie.
Increases resistance to relative longitudinal movement of the frame.
An elastomeric member is placed between the wheelset and the side frames to reduce the yaw stiffness of the wheelset. As a result, optimum yaw stiffness and lateral stiffness can be selected to provide optimal bogie stability.

US Pat. No. 5,243,920 is directed to US Pat. No. 457,920, particularly in the area of a clamp that holds struts together approximately at the midpoint between side frames.
No. 0544 discloses an improvement to the bogie. US Patent No. 5
No. 5,843,250 was an improvement on the clamp assembly of US Pat. No. 5,243,920 in that the connection between the cross struts was enhanced and the elastomeric member of US Pat. No. 5,243,920 was eliminated. The present invention further improves the clamp assembly in that by changing the position of the weld between each clamp plate and strut, the fatigue resistance of the weld is increased and the stress at the weld is reduced. It is. Thereby, the clamping assembly is strengthened and the service life is substantially extended.

In the drawings, reference numeral 10 denotes a conventional side switch.
Shows the frame and is attached to the wheelset 12 and 14. Conventional roller bearings are mounted on the wheelset and the side frames are connected by bolsters 16. The bolster is a spring 1
7 supported on the side frame.

Cross struts 18 and 20 are diagonally connected between the side frames to provide the desired resistance to relative longitudinal movement between the side frames. Each end of the cross strut 18, 20 is a base
It is attached to the side frame by a mounting bracket 22 that is attached to the side frame by a plate 24. An end block assembly 26 is mounted to the bracket 22 and has a nose (not shown), the nose of each cross strut 18.
And 20 respectively and support each strut. Thus, the end block assembly and its mounting include elastomeric elements to provide yaw stiffness and lateral stiffness.

The clamp assembly is generally designated by the numeral 30.
The details are shown in FIGS. The clamp assembly includes an upper clamp plate 32 and a lower clamp plate 34, wherein both clamp plates are identical in configuration. Each clamp plate includes a generally central trough 36 in which the central portion 38 of one of the struts 18 and 20 is located.

The central portion 38 of each strut, as shown in more detail in the cross-sectional views of FIGS. 9 and 11, includes a portion which may be referred to as a top surface 40, which is slightly curved but less shaped. It is relatively flat as compared to the lower surface 42 having a regular and inwardly curved central area 44.

The trough 36 is formed and adapted to receive a central section of the strut, with a generally U-shaped opening 48 at each end of the trough 36. Each strut is welded to the clamp plate in the area of the U-shaped opening 48, as shown at 50 in FIG. Further, each strut is welded to the trough 36 at spaced locations along its sides, as shown at 52 in FIG. Therefore,
There is a weld along the side of each strut and along the trough of the clamp plate, and each clamp plate
There is a weld between the U-shaped opening at each end of the trough and the strut.

The clamp plates 32 and 34 each have a parallelogram configuration with sides 54,
On its side, the long axis of the clamp plate is parallel to the trough and the short axis is perpendicular to the trough. FIG.
As shown in FIGS. 11 and 11, both clamp plates are secured together by fasteners 56, which extend through the aligned holes 57 to the clamp plates to provide a clamp plate assembly.

In assembly, the struts are first welded to the clamp plate by welds 50 and 52. The clamp plates are then assembled as shown in FIG. 10 and held together by fasteners 56. The clamp plate assembly is then
Completed with a weld 58 along the adjacent edge of the clamp plate, as shown at 0.

In use, the clamp assembly provides a rigid, strong interconnection between the cross struts or cross braces. The struts are individually welded to the clamp plates and, after assembly of the clamp plates, are welded together along adjacent edges. U
It is important to use a shaped opening and a weld along that opening. By placing the weld in the U-shaped opening at the end of each clamp plate trough, the weld was moved from the high residual stress area to the low residual stress area. In this context, note that the U-shaped weld between the clamp plate and the strut is along the generally flat or slightly curved surface 40 of the strut, which is an area of low strut residual stress. I want to be. In addition, the U-shaped weld is located closer to the neutral axis of the lateral bending load on the clamp assembly.
Thereby, the stress in the weld is reduced, which further increases the useful life of the clamp assembly.

While the preferred form of the invention has been illustrated and described, it will be appreciated that many modifications, substitutions, and variations are possible.

[Brief description of the drawings]

FIG. 1 is a side view of a railcar bogie of the type disclosed herein.

FIG. 2 is a bottom view of the railcar bogie of FIG. 1;

FIG. 3 is a top view of the upper frame strut.

FIG. 4 is a side view of the upper frame strut.

FIG. 5 is a top view of the lower frame strut.

FIG. 6 is a side view of the lower frame strut.

FIG. 7 is an enlarged view of the upper surface of the upper clamp or the bottom surface of the lower clamp.

FIG. 8 is an enlarged view of the bottom surface of the upper clamp or the top surface of the lower clamp.

FIG. 9 is a cross-sectional view along the plane 9-9 in FIG. 7;

FIG. 10 is an enlarged bottom view of the clamp assembly.

FIG. 11 is a sectional view taken along the plane 11-11 in FIG. 10;

Continuation of front page (72) Inventor Thomas Jay. Hayden United States. 60005 Illinois, Arlington Heights, Southvale 426 (72) Wilson W. Inventor. S. Pack United States. 60068 Illinois, Park Ridge, Park Ridge Point 1704

Claims (6)

[Claims] 1. A longitudinally spaced wheel set, a pair of laterally spaced side frames extending between and supported by the wheel sets, and between the side frames. A trolley comprising: a bolster extending to support a vehicle body; and a brace coupled between the side frames and configured to suppress relative longitudinal movement between the side frames, wherein the brace includes a longitudinal axis of the trolley. A pair of struts that are oppositely angled with respect to each other and each extend between the frames and intersect approximately at the center of the side frame, and a clamp assembly that attaches the struts at the intersection. The clamp assembly includes a pair of clamp plates, each plate having a generally parallelogram configuration and receiving struts. Each clamp plate groove has a generally central groove formed and fitted such that
Terminating at opposing ends of the plate, each clamp plate groove end has a generally U-shaped opening, each clamp plate is welded to a strut along its U-shaped opening, and a securing means is provided on the opposing surface of said clamp plate. Trolleys that are mounted in direct contact with each other. 2. The truck of claim 1 wherein each clamp plate is welded to the strut at spaced locations along each clamp plate groove. 3. Each strut has a somewhat flat surface on one side of the strut and an irregular surface on the other side of the strut in the area of the clamp assembly, the generally flat surface being a U-shape. The bogie according to claim 1, wherein the bogie is welded to the clamp plate at the opening. 4. The truck of claim 1 wherein said clamp plates are welded together along their adjacent sides to restrain relative movement between said struts in a generally horizontal plane. 5. One side of the groove where the two fixing means intersect.
The trolley according to claim 1, wherein the trolley is located one by one. 6. The truck according to claim 1, wherein each plate has a long axis and a short axis, and the plate groove extends along the long axis.