FR2869581A1 - Bumper for e.g. railway vehicle, has plunger and spring units, where free space between outer diameters of units and inner diameter of plunger is used for inserting pin guides, and partial guide with washer having two flat spots - Google Patents

Abstract

The bumper has a plunger (1), sliding gate (2), pin (3), two spring units (5, 5`) made of synthetic elastomer and a partial guide (6). A free space between outer diameters of the spring units and the inner diameter of the plunger is utilized for inserting pin guides. The partial guide has a washer (7) having two flat spots engaging between the pin guides.

Description

Keyed buffers of railway vehicles, cars or

  wagons, are designed so that the key maintains the pre-compression but also immobilization in rotation of the plunger relative to the bushel. The generalization of rectangular trays increases the torque and causes

  thus the rapid wear of the bodies in contact, key and bushel or key and plunger if it is car buffers.

  The present invention describes a principle of rehabilitation of existing buffers, but can also be used in the design of new materials. Here we will describe the principle of rehabilitation of a wagon buffer.

  Figure N 1 shows an existing buffer of the key type.

  FIG. 2 represents the section AA of a buffer according to the invention. FIG. 3 represents the BB section of a buffer according to the invention. Figure N 4 shows the section CC of the same buffer.

  The existing buffer consists of a plunger (1), a plug (2), a key (3) and a rubber spring (4) which occupies the entire housing. In the context of the present invention, the spring (4) is replaced by two elements of synthetic elastomer (5) and (5 '), of a diameter smaller than that of the existing spring. A partial guide (6) is used consisting of a washer (7), an outside diameter slightly smaller than the bore of the plunger (1), a rod (8) welded to the washer (7) and penetrating in each of the elements of the springs (5) and (5 '). The washer (7) carries two flats (9) facing each other, spaced one from the other by the diameter of the washers of the spring elements (5) and (5 '); it is pierced with four holes (10) allowing the springs to flow and thus prohibit any rotation of the guide (6).

  On the plate (11) of the bottom of the plug, it is cut two flats (12) diametrically opposite and spaced from each other of the diameter of the washers of the springs (5) and (5 '). These cuts are made with respect to the key grooves (13), in addition, the plate (11) carries at its center a centering pin (14) for the springs (5) and (5 ').

  The space left between the outside of the springs (5) and (5 ') and the inside diameter of the plunger (1) is used to place two key guides (15) and (15') which will increase surfaces in contact and thereby reduce wear. The key guides (15) and (15 ') are made of a cast steel part having a keyway (16) and a bead (17) engaging inside the plunger tube (1) in the existing groove (13) previously enlarged.

  Each of the guides (15) is welded to the plunger tube to become integral with the latter.

  The same principle can be applied in the case of car buffers for which the plug plunger sockets are reversed with respect to the wagon pads; the key guides (15) and (15 ') will then be welded into the plug instead of the plunger.

  When assembling the pad, the flats (9) of the guide (6) will be placed opposite the keyways (15) and (15 ').

Claims (7)

  1. Shock buffer consisting of a plunger (1), a plug (2), a key (3), two elements of synthetic elastomer (5) and (5 '), a partial guide (6) characterized in that the free space between the outer diameter of the spring elements (5) and (5 ') and the inner diameter of the plunger is used to insert the key guides (15) and (15') therein. ) 2. Shock buffer according to claim 1, characterized in that the washer (7) of the guide (6) comprises two flats (9) engaging between the key guides (15) and (15 ').   Shock buffer according to Claim 1, characterized in that the washer (7) of the spring guide (6) is pierced with four holes (10) for the creep of the spring elements (5) and (5 '). to immobilize the guide in rotation.   4. Shock buffer according to claim 1, characterized in that each of the key guides (15) and (15 ') comprises a heel (17) engaging in the existing grooves (13) previously enlarged of the plunger (1). ).   5. Shock buffer according to claim 1, characterized in that each of the guides (15) and (15 ') is welded to the tube of the plunger (1).   6. Impact buffer according to claim 1, characterized in that the plate (11) of the bottom of the plug is cut to present two flats (12) facing key grooves (15) and (15 ').   7. Impact buffer according to claim 1, characterized in that the plate (11) of the plug base carries a centering pin (14) welded.