US2060052A - Draft and buffer gearing - Google Patents

Description

NOV. l0, 1936. Q E.' EDMUNDS 2,060,052

DRAFT AND BUFFER GEARING Original Filed Jan. 27, 1934 2 Sheets-Sheet l NOV. 10, 1936. G, EDMUNDS :2,060,052

DRAFT AND BUFFER GEARING Original Filed Jan. 27, 1934 2 Sheets-Sheet 2 D v v 9 ZZ Patented Nov. 10, 1936 UNITED STATES DRAFT AND BUFFER GEARING Glenn E. Edmunds, Columbus, Ohio, assigner to The Bonney-Floyd Company, Columbus, Ohio,

a corporation of Ohio Application January 27, 1934, Serial No. 708,679 Renewed September 4, 1936 13 Claims.

The present invention relates to draft and bufier gearing. While the gearing oi the invention is of general application, it is particularly applicable to mine cars and will accordingly be described in such association and with reference to the accompanying drawings in Which Figure 1 is a plan View, partly in horizontal section of a typical embodiment of the invention;

Figure 2 is a view substantially on line 2-2 of Figure 1;

Figure 3 is a section substantially on line 3-3 of Figure 1;

Figure 4 is a section substantially on line 4-4 of Figure 1; and

Figure 5 is a section substantially on line 5-5 of Figure l, being also a vertical section through the iront portion of a mine car body with which the gearing is shown as being associated in novel manner. Referring to the drawings, reference numeral designates generally draft and buffer supporting means in the form, as here shown, of a bracket or housing designed as an end sill member and comprising a rear vertical wall II having cast integral therewith, as here shown, parallel upper and lower forwardly projecting webs or walls l2 and I3. Also cast integral, as here shown, with the rear wall II, are a pair of arms I4 and i5 which have parallel outer vertical faces adapted to be riveted against sill members such as are indicated in dotted lines at I6 and i1. The rear wall Il projects slightly outwardly of arms i4 and I5, these projecting portions being designated by the reference characters i8 and i9, respectively. The outer ends of walls i2 and i3 are joined by parallel walls A2li and 2I which integrally connect walls II, I2 and I3. The rear wall l I may be connected with arms I4 and i5 by means of gussets as at 22, Figures 1 and 4.

Walls II and I2 are curved forwardly and inwardly beyond the outer extremities of walls 20 and 2i and wall I2 has a relatively large central cutout or recess 23 which in effect divides the wall into two sections. Centrally, wall I3 is downwardly offset as at 24, Figures 2, 3 and 5, the ofset 24 having a horizontal top face which extends up to a lower vertical attachment ange 25. The top wall I2 has a similar Vertical attachment ange 2B, the rear faces of flanges 25 and 25 lying in the same vertical plane as here shown.

The rear wall II is centrally rearwardly offset to form a triangular housing portion or pocket 21, the pocket portion being angular in plan View and symmetrically disposed with reference to the bracket ends. The pocket is completed, top and bottom, by rearward extensions of Walls I2 and I3.

Mounted in pocket 21 is a drawbar 28 which is substantially the shape oi a flat isosceles triangle so as to be receivable in pocket 21 to seat firmly therein. The drawbar comprises top and bottom triangular Webs 29 and 3i) and an interconnecting vertical web 3I. At its extremities, web 3| is in the plane of the forward edges of webs 29 and 30, but centrally it is rearwardly oiTset to provide a central pocket 32 whose rear wall is curved substantially concentrically with respect to aligned apertures 33 and 34 formed in webs 29 and 3 on a vertical line traversing the pocket. It Will be noted from Figure 1 that the apex of the triangular drawbar is rounded off substantially on the curve of the vertical web 3I and that the point of pocket 21 is correspondingly curved.

The drawbar is slidably received between thickened portions I2 and I3 of walls I2 and I3. The rearward extensions of walls I2 and I3 are provided with vertically aligned fore and aft extending slots 35 and 35, Figures 1 and 5, which register with the apertures 33 and 34 in the drawbar, the latter being cylindrical and receiving a bolt 31 which projects upwardly and downwardly through slots 35 and 36. Washers 38 and 39 are -30 interposed between the head of bolt 31 and a nut 4G screwed on the lower end of the bolt and retained by a cotter pin 4I.

A draft hook 42 has a shank 43 extending between webs 29 and 30 of the drawbar into the pocket 32, the shank having an aperture in which bolt 31 is engaged. The hook has a heel portion 44 which is slidable on the upper surface of offset 24 which thus largely supports the weight of the hook. With the drawbar fully seated in recess 21, the end of the hook preferably does not extend outwardly beyond the forward limits of walls I2 and I3 so that danger of its injury through impact is thus avoided. The hook is rendered accessible for bitching purposes through recess 23 in the bracket top wall I2.

A pair of buffer elements 45 and 453 are supported between the outer ends of the bracket walls I2 and I3 for sliding movements, these buffer elements being interchangeable upon reversal. Each buffer element comprises parallel top and bottom walls 41 and 48, as most clearly shown in Figures 2 and 4, and, as most clearly shown in Figures 1 and 2, each comprises inner and outer parallel vertical end walls 49 and 5B which 55 connect the inner and outer edges of the top walls, all these walls preferably terminating rearwardly in the same vertical plane, the front edges of the walls being joined by a forward vertical wall 5 which adjacent wall F59 has a substantially flat impact face rounded ori rearwardly to the outer wall 5G. The top and bottom walls of the buffer elements are provided with fore and aft extending aligned slots 52 and 53 in which are engaged pins 54. The lower bracket wall I3 is provided with downward offsets 55 in which are provided upwardlyT open recesses receiving the lower ends of pins 5t. The upper ends of pins 54 are received in apertures provided in wall I2 above the recesses and extending into upstanding bosses or collars 5'! provided with counter bores as at 58, Figure 2, through which are passed Cotter pins 59, these latter passing also through bores in the upper ends of pins 54. The bosses may be cut away to accommodate the ends of the cotter pins in the manner shown in Figure 2, and if desired, wedges 50 for opening the ends of the pins upon their insertion may be formed or secured on wall I 2.

At each side of the slots 52 and 53 of each buiier element, spring seats 6I and 62 are formed on the inner face of front wall 5 I Figures 1 and 4, these seats having centering bosses formed thereon. The drawbar is provided at its ends, that is, at the ends of vertical web 3l, with centering bosses 63, Figure l, the ends of the drawbar extending between the adjacent sides of the buier elements so that bosses G3 are aligned with the seats 6i of the buffer elements. The rear wall of the bracket is provided with centering bosses 6A aligned with seats G2. Inner compression springs 65 are interposed between the ends of the drawbar and seats 6I, outer compression springs 5 being interposed between the bracket and seats 52.

It will be noted from Figure l. that seats 6I are somewhat farther forward than seats E2, this being for the reason that, as here shown, the forward faces of the ends of the drawbar are in advance of the forward faces at the ends of bracket wall I I.

This enables springs S5 and 66 to be made interchangeable, since each has the same length as the other. As here shown, the springs are shown as being spaced at equal distances at the sides of pins 5f! so that, being of equal strength, they exert a balanced effect upon the buffer elements.

The inner side walls of the buffer elements are guided to some extent by the shoulders formed by the thickened wall portions i2 and I3', the outer side walls of the buier elements being disposed inwardly of the bracket side walls 2Ii and 2i. The relation is such, however, as to permit pivoting of the buffer elements about pins 54, as well as movements toward and away from the bracket permitted by the slots 52 and 53. Outward movement of the buier elements is limited by the engagement of the rear ends of slots 52 and 53 with the pins 54. Inward movement is limited by engagement of the inner walls 49 of the buffer elements with the ends of the drawbar and upon the simultaneous engagement, in the case of translational movement, of the outer walls 5G with lugs 6l and 68 formed in the corners between bracket wall portions I 8 and 20, and I9 and 2|.

In Figure 5, I have shown the gearing associated with one end of a mine car body 69. In this figure, reference numeral 'I0 designates one of a pair of longitudinal sill members which may be angle bars to the inner faces of which the bracket arms are riveted. A floor plate II is secured to the sill members as are also ilare plates as at 12. The car end wall is constituted by an end plate 'I3 and the vertical web l!! of an angle bar l5 which constitutes an end sill member. The lower edge of plate I3 is sufficiently spaced from the top of web 'Eil to provide an opening 75 which extends from sill to sill and is adapted to receive the drawbar housing portion of bracket ID, flange 25 being secured to the outer margin oi web 'M and flange 2G being similarly secured to plate 'I3 so that opening 'i5 is entirely filled. In this manner, the outward projection of the gearing is considerably curtailed and a rigid end structure is provided. Reference numeral l'i designates a portion of a body side wall.

Upon the application of draft to the drawbar, as through hook 42 or any similar' draft element, the drawbar tends to move for 27, thus compressing springs S5 which react to compress springs 66 by reason of the pivotal mounting of the buier elements. The drawbar is guided against lateral displacement through the engagement of bolt 3'! in slots 55 and 56, forward outward movement of the drawbar being limited through engagement of bolt 3l with the outer ends of the slots. In order to prevent the entrance of material into the slots, washers 38 and 39 are of suiiicient size to cover the slots in all positions of bolt 3T therein. Preferably, the slots permit the drawbar to seat irmly against the rear bracket wall under the force of the springs.

VVE-.ile it will be seen that the springs act in f ably without departure from the invention as delined in the following claims,

I claim:

l. Apparatus of the class described comprising a bracket, a pair of buer elements supported at horizontally opposite ends ci the bracket for i limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid dra-wher adapted for draft application at its central portion supported by the bracket with its ends behind the adjacent sides of said buffer elements, shock absorbing means between the ends of the drawbar and said adjacent sides of said buiTer elements, and shock absorbing means between the outer sides of said buier elements and abutments on the bracket,

the shock absorbing means associated with eef buffer element being on opposite sides of the pivcting axis thereof and exerting a normally balanced action thereon, draft applied to the draw bar causing pivoting of said buifer elements and compression in series of the springs associated with each buier element, the springs associated with each buffer element acting in parallel under bui.

2. Apparatus of the class described comprising a bracket, a pair of buier elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar adapted for wardly out of pocket www..

draft application at its central portion supported by the bracket with its ends behind the adjacent sides of said buffer elements, guide means preventing lateral displacement of said drawbar, shock absorbing means between the ends of the drawbar and said adjacent sides of said buffer elements, and shock absorbing means between the outer sides of said bulfer elements and abutments on the bracket, the shock absorbing means associated with each buffer element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the draw bar causing pivoting of said buffer elements and compression in series of the springs associated with each buffer element, the springs associated with each buffer element acting in parallel under buff.

3. .Apparatus of the class described comprising a bracket, a pair of buifer elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar adapted for draft application at its central portion supported by the bracket with its ends behind the adjacent sides of said buffer elements, a vertical bolt passed through said drawbar and slidably engaged with said bracket for preventing lateral displacement of said drawbar, shock absorbing means between the ends of the drawbar and said adjacent sides of said buffer elements, and shock absorbing means between the outer sides of said buffer elements and abutments on the bracket, the shock absorbing means associated with each buffer element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the draw bar causing pivoting of said buffer elements and compression in series of the springs associated with each buffer element, the springs associated with each buer element acting in parallel under buff.

4. Apparatus of the class described comprising a bracket, a pair of buifer elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar supported by the bracket with its ends behind the adjacent sides of said buffer elements, a vertical bolt passed through the central portion of said drawbar and slidabiy engaged with said bracket for preventing lateral displacement of said drawbar, a draft element engaged with said bolt, shock absorbing means between the ends of th-e drawbar and said adjacent sides of said buffer elements, and shock absorbing means between the outer sides of said buffer elements and abutments on the bracket, the shock absorbing mea-ns associated with each buifer element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the draw bar causing pivoting of said buffer elements and compression in series of the springs associated with each buffer element, the springs associated with each buffer element acting in parallel under buff.

5. Apparatus of the class described comprising a bracket, a pair of buffer elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar adapted for draft application at its central portion supported by the bracket with its ends behind the adjacent sides of said buifer elements, said bracket including top and bottom walls between which the drawbar is received, said walls being provided with aligned fore and aft extending slots, a bolt passed through the drawbar with its ends slidable in said slots for preventing' lateral displacement of said drawbar, shock absorbing means between the ends of the drawbar and said adjacent sides of said buffer elements, and shock absorbing means between the outer sides of said buffer elements and abutments on the bracket7 the shock absorbing means associated with each bufier element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the draw bar causing pivoting of said buifer elements and compression in series of the springs associated with each buffer element, the springs associated with each buffer element acting in parallel under buff.

6. Apparatus of the class described comprising a bracket, a pair of buifer elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar supported by the bracket with its ends behind the adjacent i sides of said buffer elements, said bracket including top and bottom walls between which the drawbar is received, said walls being provided with aligned fore and aft extending slots, a bolt passed through the drawbar with its ends slidable in said slots for preventing lateral displacement of said drawbar, a draft element engaged with said bolt, shock absorbing means between the ends of the drawbar and said adjacent sides of said buffer elements, and shock absorbing means between the outer sides of said buffer elements and abutments on the bracket, the shook absorbing means associated with each bulfer element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the draw bar causing pivoting of said buffer elements and compression in series of the springs associated with each buffer element, the springs associated with each buffer element acting in parallel under buff.

7. Apparatus of the class described comprising a bracket. a pair of buffer elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar supported by the bracket with its ends behind the adjacent sides of said buifer elements, said bracket including top and bottom walls between which the drawbar is received, said walls being provided with aligned fore and aft extending slots, a bolt passed through the drawbar with its ends slidable in said slots for preventing lateral displacement of said drawbar, the drawbar having a forwardly faced recess traversed by said bolt, a draft element extending into said recess and pivotally engaging said bolt, shock absorbing means between the ends of the drawbar and said adjacent sides of said buifer elements, and shock absorbing means between the outer sides of said buffer elements and abutments on the bracket, the shock absorbing means associated with each buffer element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the drawbar causing pivoting of said buffer elements and compression in series of the springs associated with each buffer element, the springs associated with each buffer element acting in parallel under buff.

3. Apparatus of the class described comprising a bracket, a pair of buffer elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar supported by the bracket with its ends behind the adjacent sides of said buffer elements, a vertical bolt passed through the central portion of said drawbar and sldably engaged with said bracket for preventing lateral displacement of said drawbar and for limiting movement of the drawbar away from the bracket, a draft element engaged with said bolt, shock absorbing means between the ends of the drawbar and said adjacent sides of said buffer elements, and shock absorbing means between the outer sides of said buffer elements and abutments on the bracket, the shock absorbing means associated with each buffer element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the drawbar causing pivoting of said buffer elements and compression in series of the springs associated with each buffer element, the springs associated with each buffer element acting in parallel under buff.

9. Apparatus of the class described comprising a bracket, a pair of buffer elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar supported by the bracket with its ends behind the adjacent sides of said buffer elements, said bracket including top and bottom walls between which the drawbar is received, said walls being provided with aligned fore and aft extending slots, a bolt passed through the drawbar with its ends slidable in said slots for preventing lateral displacement of said drawbar and for limiting movement of the drawbar away from the bracket, a draft element engaged with said bolt, shock absorbing means between the ends of the drawbar and said adjacent sides of said buffer elements, and shock absorbing means between the outer sides of said buffer elements and abutments on the bracket, the shock absorbing means associated with each buffer element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the drawbar causing pivoting of said buffer elements and compression in series of the springs associated with each buifer element, the springs associated with each buer element acting in parallel under buff.

10. Apparatus of the class described comprising a bracket, a pair of buffer elements supported at horizontally opposite ends of the bracket for limited movement toward and away from the bracket and pivoting movements relative thereto on vertical axes, a rigid drawbar of substantially the shape of a flat isosceles triangle with its apex rearwardly directed, said drawbar being supported by the bracket and the latter having an angular pocket in which the drawbar is normally seated and whereby movement of the drawbar toward the bracket is limited, the ends of said drawbar being positioned behind the adjacent sides of said buffer elements, shock absorbing means between the ends of the drawbar and said adjacent sides of said buffer elements, and shock absorbing means between the outer sides of said buffer elements and abutments on the bracket, the shock absorbing means associated with each buffer element being on opposite sides of the pivoting axis thereof and exerting a normally balanced action thereon, draft applied to the draw bar causing pivoting of said buffer elements and compression in series of the springs associated with each buffer element, the springs associated with each buffer element acting in parallel under buff.

11. For use in apparatus of the class described, a drawbar of substantially the shape of a fiattened isosceles triangle, said drawbar having top and bottom triangular webs and a vertical web connecting said rst-named webs substantially from end to end of the latter, said vertical web being centrally offset toward the apex of the triangle to provide a forwardly faced recess, said first-named webs being provided with apertures aligned on a line passing through said recess.

l2. For use in apparatus of the class described, a drawbar of substantially the shape of a flattened isosceles triangle, said drawbar having top and bottom triangular webs and a vertical web connecting said first-named webs substantially I from end to end of the latter, said vertical web being centrally offset toward the apex of the triangle to provide a forwardly faced recess, said rst-named webs being provided with apertures aligned on a line passing through said recess, the extremities of said vertical web being substantially ush with the forward edges of said top and bottom webs, and spring centering bosses on the forward faces of said extremities.

13. The combination with a car body comprising end and side walls and a bottom wall, one of said end walls being provided with a horizontally elongated opening, of a draft and buier means supporting bracket including a housing portion projecting inwardly of the body through said tion of the body, a bolt slidable in said slots,

and a washer on said bolt above said top wall of a size to cover the slot in said top wall in all sliding positions of said bolt.

GLENN E. EDMUNDS.

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