US1758212A - Crosshead - Google Patents

Description

F. N. BARD 1,758,212

CROSSHEAD Filed Dec. 21. 192,2 3 Sheets-Sheet l May 13, 1930.

wm. om N@ F. N. BARD rMay 13, 1930.

CROSSHEAD Filed Dec. 2l. 1922 3 Sheets-Sheet 2 F.N.BARD

May 13, 1930.

cRossHEAD Filed Dec. 21. 1922 5 Sheets-Sheet 3 Patented May 13, 1930 PATENT OFFICE FRANCIS NORWOOD BARD, F HIGHLAND PARK, ILLINOIS CROSSHEAD Application filed December 21, 1322.

Bly present invention relates in general to cross-heads, and more particularly to a t Lvpe of cross-head in which provision is made for wear and replacement.

In a locomotive, the cross-head reciprocates between guides located immediately to the rear of the cylinders, and forms the pivotal connection between the piston rod and the adjacent end of the pitman or crank. The

chief function of the cross-head is to relieve the piston of angular stress from the pitman.

Some parts such as the slippers or shoes, being subject to a greater amount of wear, tear and strain than the cross-head proper, it is r desirable to make them readily adjustable to take up the wear or looseness and also readily detachable to permit of replacement. lVhere such adjustment is provided directly between the cross-head body. and the slippers,

l have found in actual operation, that a wearing action is also produced on the crosshead body proper, which requires repair and replacement of that part also. I have therefore found it advisable to so arrange for the desired' detachability and replacement of the slippers as to reduce this wear on the crosshead body to a minimum.

Among the more important objects of this invention therefore are: the pro ion of an arrangement whereby the slippen mounted for adjustment independently oV ia eros head body; the provision in at least one elnbodiment hereinafter describedr` of an interlnediatelmember which is detachably but nonadjust-ably carried from the ci ss-head body, and upon which in turn the slipper is n'iounted for relative adjustment; the provision of a slipper so associated as to be at all times freely removable from the cross-head, and more particularly with such association. of an arrangement whereby the movement el" the lslipper in one direction relatively to the cross-- head produces an adjustment thereof in another direction; the provision with a slipper and cross-head of means for giving the slipper a relative movement. which means are at all times freely removable with said slipper: the provision of a plurality of independent means for moving' the slipper; the provision of means at each end of the cross-head for Serial No. 608,367.

giving the slipper a movement relatively to the cross-head body; the provision of an eilicient arrangement for causing a movement of the slipper in one direction to produce a movement thereof in another; and the provision generally of a simplilied, new, improved and more etiieient cross-head construction of the character described.

Among" the additional objects of this inven- 'tion are the provision of an improved readily detachable and adjustable wearing member' or shoe on the cross-head, and the provision in combination therewith, of means movable eiative the cross-head and shoe for taking up wear, such means being' characterized by the feature of displacing the shoe always parallel to the longitudinal axis of the crosshead, so as to prevent greater wear on one part than on another part.

ln the attainment of the objects referred to, together with such additional benefits and advantages as may hereinafter appear or be pointed out, I have provided a construction, which takes form in the several embodinients illustrated in the accompanying drawings in winch- Figure l is a side elevational view of the cross-head partly broken away;

Figure is an end elevational view thereof, also partly broken away g Figure 3 is a side elevational view, partly in section of an alternative form of this invention;

Figure el is a plan view of the shoe removed from the cross-head:

Figure 5 is an end elevational view of the device of Figures 23 and 4. parts being' in section.

Figure 6 is a side elevational view, partly in section. illustrates a further modified form of this invention.

Figures 7 and 8 are sectional views taken on lines 7 7 and 8-8 resjiective'ly, of Figure looking in the direction indicated by the arrows; and

Figure 9 is a perspective view of one of the parts of the form shown in Figures (i, 7, and 8.

As the upper and lower halves of the crosshead are in all respects substantial duplicates, l will eontine this description to one of the halves tor purposes of convenience, which comprises generally three parts, reference here to Figures 1 and 2, namely: the crosshead body 10, the shoe 11, and the slipper or wearing piece 12.

The shoe 11 is provided with the inwardly extending walls 13 and 14 having their outer surfaces oppositely inclined as shown at 15 and 15, and arranged to be received in the slot l? in the cross-head body 10, said slot having its opposite walls inclined as shown at 16, 16 A dove-tail connection is thus alforded lietween the shoe 11 and the cross-head body 10, by means of which any relative transverse movement ot the two is prevented.

The shoe 11 is detachably supported upon the cross-head body 10, and retained against longitudinal displacement thereon by the provision ot two or more transverse bolts lVQ-lS, the walls 13 and 14, and the walls 19-19 ot. the cross-head, having complementally arranged transverse apertures 20-21, adapted to 'ne alined for reception of said bolts The shoe 11 is provided on its outer face with the slot of substantial length and width, in which slot is received the cars and 26 depending from the shoe 11, the ears 26 and 26 being spaced apart preferably a substantial distance and illustrated as positioned adjacent the end walls 2T and 2S ot the slot 25, the distance between the outer walls 2!) and 30 of the ears 26 and 26 being iowever shorter than that between the end walls 2T and 28 of the slot 25, to permit ot the movement ot' the ears 26 and 26 in the slot 25 longitudinally ot the cross-head. The slot 25 terminates short of either end of the shoe 11, leaving the upstanding end wall portions 31 and 32, which have their top or outer faces 3l) and 34 inclined in parallel planes as clearly shown on the lett ot Figure 1. These walls 31 and 32 are furthe-r provided with the slots 35, 36 each open toward and in the direction ot the slipper 12, the bottom Si" of each slot being curved as clearly shown in Figure the. purpose ot which will appear shortly.

ln viewing Figure 1, it will be seen that the inner or lower surtace or wall of the shoe 11 has` its end portions 3S) and 4() inclined at ll and -12 oppositely to and in parallelism n the inclined upper portions 32% and 2&4 ot the walls 31 and 32 and it will be further seen that the inclined surfaces 33 and 41, Ill and i2 are preferably ot' the same length, and that the inclined surfaces of and 34 ot' the shoe, are spaced apart substantiallyv the saine distance as are the inclined surfaces 41 and oi the slipper. 'l`he ear 26 is spaced at a distance trom the inclined portion 4l oi the shoe whereas tht` ear 26 is positioned immediately adjacent the other inclined portion 42 of the slipper.

From the structure thus tar described, it will be seen that to assemble the slipper 12 on the shoe 11 all that is necessary is to bring the ears 26, 26 into position into the slot 25 by a movement of the slipper transversely of the cross-head, and that a similar relative movement of the two in the opposite direction will result in a disassembling ot the two. It will be further obvious that any relative longitudinal movement between the shoe 12 and the slipper 11 Will result in a transverse movement of the two due to the coaction of the two sets of inclind surfaces 41 and 34, 42.

The slipper and shoe are shown in Figure 1 at their extreme inner longitudinal position with the ear 26 in Contact with the end vall 28 and with the ear 26 at a distance 'from the other end wall 2i' of the slot rl'he ears 26, 26 in this position ot adjustment ot the slipper are in their position nearest to the longitudinal axis ot' the cross-head, and are preferably ot a length that in this position, their bottom surfaces 43 contact Vith the adjacent bottom of the slot The ears 26, 26 thus coact with the end walls 27 and 2S and with the bottom ot the slot 25 to form stops to limit the relative longitudinal movement otthe slipper and shoe.

lt will be noticed that l have provided two sots ot coacting inclined surfaces 33, 4l and 34, 42 to cause the longitudinal movement of the slipper to produce a lateral adjustment thereof, and that these sets of inclined surfaces are positioned at a substantial distance apart and adjacent each end of the crosshead.

'lhe slipper 12 is provided on its outer surface 45 with brasses to engage with and slide upon the end or inner tace ot the guide upon which the cross-head reciprocates. The shoe 11 is provided with the flanges 46 and 47, the inner walls of which are provided with brasscs which engage with and slide upon the si-ile or lateral faces of the guide.

For producing a relative longitudinal movement 1netween the slipper and shoe, l have provided the ears 26 and 26 each with threaded openings arranged to receive therein the threaded bolt 48 or 49 received loosely in the slots 35, 36 with the bolt heads 5() and 51 in engagement with the opposite ends ot the shoe as shown. Each ear receives two bolts as will be clear upon viewing Fig. 2.

1When it is desired to produce a lateral adjustment of the slipper 11, the bolts at one end or the other depending upon the direction of adjustment vdesired are turned to move the slipper longitudinally which will cause a lateral movement of the slipper, the slots 35 and 36 permitting the bolts 50 and 51 to move laterally with the slipper.

As will be obvious, the slipper is free at all times for removal from the cross-head merely upon a lateral movement thereof, neither the bolts 50, 51 nor the ears 26, 26', interfering in any way with such movement.

As the part ot the cross-head engaged by lid lll

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the slipper is necessarily also subject to considerable wear due to its association with the slipper, I have made provision for this by having the shoe 11, dctachably but non-adj ustably connected to the cross-head body so as to permit of its removal and replacement having the slipper 12 'detachably carried therefrom.

Referring now to the alternative form of the invention illustrated in Figures 4, and 5, and confining the description to one of the halves of the device for purpose of convenience, there is provided the cross-head bodj,Y shoe 11, and the slipper or wearing plate 12R. Thus, essentially the device of Figures, 8, 4, and 5 embody similar elements to those of the device illustrated in Figures 1 and However, in the rdevice of Figures 1 and 2, the slipper, while in course of adjustment, carries the bolts 5() and 51 with it, and the structure now to be described eliminates the necessity of laterally slidably mounting the retaining and adjusting bolts. and accomplishes this by mounting such bolts for lateral angular displacement.

In carrying out the feature mentioned above, the cross-head is provided with longitudinal spaced parallel side walls 54 and 55, which are provided with the inclined internal surfaces 56 and 57, said walls being joined at one end of the cross-head, preferably the front end, or the part nearer the piston rod by an abutment 58 and affording at the other end an entrance 59 through which the depending walls 60 and 61 of the shoe may be introduced. These walls afford a space 62 for giving the shoe a certain amount of inherent resiliency and also affording a chamber in which certain parts to be presently described are contained. The walls 60 and 61 are provided with inclined outer surfaces 63 and 64. respectively, and said surfaces are adapted to fairly snugly contact with the surfaces 56 and 57 of the walls 54 and when the shoe is inserted.

The abutment 58 is provided with an inclined inner surface 65 which is adapted to engage a complementary inclined surface 66, formed on a transverse abutment 67, which latter is formed integrally with the inner surface of the shoe. The abutment is provided with inclined suraces 67, which engage the surfaces 56 and 57. The abutment 67 is pro vided vith a forwardly extending portion 68 which is adapted to overlie the abutment 58, as best seen in Figure The walls 60 and 61 terminate short of the abutment 67, for a purpose which will presently appear.

The slice, after having been inserted, is nen-adjustably retained on the cross-head by thc provision of a transverse bolt 69, which passes through complemental openings in the walls 54 and 55 of the cross-head, and between two transverse webs 70 and 71, integrally or otherwise formed with the shoe 11a, and disposed toward the rear end of the chamber 62. It will be obvious that when the bolt is placed in the position shown in Figure 3. the shoe is effectively retained against longitudinal displacement relative to cross-head, the webs 7() and 71 and the inclined surface 66 cooperating to this end. Furthermore the dove-tail connection afforded by the inclined surfaces 56, 57, 63, 64, 65 and 66, effectively prevents outward displacenient of the shoe. As a further means for preventing dislodgment of the shoe or undue vibration thereof, there is provided a short bolt 72 having its head 73 seated in the abutment- 67, which bolt projects through an opening 74 in the abutment 58 and receives a retaining nut 75 on its projecting end, which nut 75 engages the outer surface of abutment 58, as best seen in Figure 3.

From an inspection of Figures 3 and 5 it will be observed that the upper part of the shoe is provided with a channel 76, bordered by parallel flanges 77--77, and in said channel there is placed the slipper or wearing plate 12a, which slipper is intended to be constructed of a proper wearing material and forms the principal surface of contact between the device and the cross-head guide, not shown,

The slipper is longitudinally and laterally adjustable on the shoe for the purpose of taking up wear, and to the end that this function may be accomplished, while the cross-head is in its guides, without subjectingl the parts to the necessity of complete dissembly, and in order to eliminate chattering or other vibration of the slipper, there are provided the sets of adjusting and retaining rods or bolts 79 and 80, said bolts being arranged to move the slipper longitudinally, and also adapted for angular displacement.

The inner surface of the slipper' is, for the greater part of its length, parallel to the outer surface. but at the proper points the slipper is internally provided with inclined surfaces 81, 82, and said surfaces being complemental to and in engagement with inclined surfaces 84, and 86, said latter mentioned surfaces being formed on the eXtension 68, transverse web 87. and end abutment member 88, respectively, the web 87 and abutment 88 being integrally formed with the shoe 11a.

As best seen in Figure 4, the sets of rods 79 are arranged in a multiple of two, one rod being placed on each side of the longitudinal axis of the cross-head. in spaced relationship. and both rods having threaded portions 89 which pass through threaded openings in a transverse rocker bar 90, the latter lying in a recess 91 in the under-surface of the wearing plate 12a, and furthermore being retained against displacement from said recess by the provision ot' a curved flange 92, formed integrally with said wearing plate. The wearing plate is furthermore recessed at 94 to aecommodate the projecting parts oi the rods 79.

The rods 79 pass through suitable eularged openings 05 provided in the abutment (3T. as best seen in Figure 3, and on said rods are provided sleeves 00, the inner ends 9T of which are hemispherically Yformed to seat in similarly formed recesses 98 in the abutment (ST. Heads are provided on the rod 79, and said heads abut the outer ends ot the sleeve 9b. The sleeves and the head ot' the adjusting rods in this instance lie within openings 101e-101 provided in the abutment 08. The heads Si) of the rods lie bevond the abutment so as lo be readily acc'ible `for turning. lt will be observed that the opening and the openings 100 are ot suflieient area to permit of angular displacement ol the rods in their sockets. The walls G0 and (il terminate at the points seen in Figure l in order to afford space for the rocker bar Si.

At the other end of the cross-head, and operating oppositelv to the rods T9 there are provided the rods 80, referred to hereinbefore, and these rods are sin'iilarlj.' arranged in a inultipie oi two and pass through a suitable transverse rocker bar which suits in a recess 91a, provided in the nnoer surface of the slipper 12a, and said bar is retained in said recess by the provision ofil a curved flange The rods or adjusting bolts SO pass through spaced tapered openings 101 in the abutment 88, and similarly to the rods 7S). said rods S0 are provided with hemispheri cal portions 102 which scat in similarly formed sockets 103 in said abutment 88. The outer ends of the rods 80 are provided with heads 10d, which a re readily accessible for adjusting the slipper.

lt will be seen from inspection of Fi 2E and l that the strurture oi the shoe i, .etaniiallv Awleton, and is filled by the insertion and srcurement o" the w aring plate i?. This arrangement makes `for light construction. and at the same time does not wel the dei ice.

lVhen it is desi ed to adjust the slipper on the shoe. one or the other of the sets of adjustiug rods is manipulated to longitudinally displace said slipper. Ot' course, when the slipper is originally placed on the crosshead, it is in the position shown in Figure 1, but as the outer surface 'thereof gradually wears, the bolts EEO are turned to move the slipper toward the rear end of the cross-head, the bolts 79 being first released to permit ot such displacement. ben the slipper is in the proper position, both of the sets o bolts are tightened and the slipper' is again ready for use.

It will be observed that it is possible to replace the slipper or shoe, it necessary, while a locomotive is in service without removing the cross-head from its guides, as a new shoe and slipper may be inserted between the crosshead and the guide by first removing bolts 69 and T and then removing the damaged worn-ont shoe or slipper, and then placing the new shoe with its slipper in position. The openings are ot sufiicient size to permit the heads 9S) of the rods TQ to be drawn to the rear through said openings. After the new slipper and shoe have been placed in position ou the cross-head the slipper may be adjusted into proper wearing position in the manner previously eXplained.

Referring now to the form of the invention shown in Figures o, T, S, and S), there is provided a cross-head 10b having an integral axial collar 105 at the 'forward end for receiving a piston rod 10G. The cross-head is preferably hollow to afford a chamber 10, and the walls 10iJl of said chamber are roith alined openings 108-1OS for receiving a transverse pin (not shown) affording a connection between the cross-head and the driving rod (not shown), which is usually provided.

The upper and lower portions of the crosshead, assuming that the cross-head is elnploved on a steam locomotive, are provided with tapered dove-tail connections for receiving and supporting the shoes 11"-11b, which shoes engage opposed guides, not shown. As l vided `ooth of the shoes and the parts ot the cross-head adjacent thereto are identical in construction I will describe but one of the saine.

As best seen in Figures 7 and 8 the crosshead is provided with a tapered dove-tail slot 105i which extends from a terminal pocket 110 at the forward end of the cross-head and opens at the rear end of the cross-head. The base et the groove 109 has a plain surface 111, and the shoe 11 is provided with a longitudinal abutment 112 which is tapered 10ni'itudinallv to lit snugly in the slot 109 when the cross-head and shoe are first assembled. The relationship of the abutment and the slot are such that when the parts are first assenioled the forward edges 113 and 114 of the shoe and cross-head respectively are in vertical alinement.

The abutment 112 carries a plurality of transversely arranged bolts 115 which project through the walls 116 of the cross-head bordering the groove and engage each in one ot the comple-mental slots 117-117 in .said walls.

The shoe is adapted to be longitudinally adjusted upon the cross-head for the purpose et taking; up such wear as may occur on the uter sui-tace 118 of the shoe, and to this end he abutment 112 is provided, as best seen Figure 9, with a longitudinal groove 119 i'or irceiving the shank 120 of a wedge devicer adjustable on said shoe. The two porifi?) Neef-u2 tions of the abutment spaced apart by the formation of said groove are provided with forwardly inclined surfaces 121-121, 122- 122, and the shank 120 is provided with complemental laterally extending tapered tongues 125% and 124. which are adapted to engage the surfaces 121 and 122, respectively, as best seen in Figure 1.

dien the parts are assembled the under surface of the abutment 112 and the under surface 126 ot the shank 120 are flush and engage evenly the surface 111. A threaded rod 121 is provided on the shank 120 and projects throu `lh a vertical slot 128 provided in a lug 129 ormed integrally on the bottom rear portion ot the shoe. Lock nuts 130 130 serve to retain the rod and the shank in adjusted position on the shoe.

"Vhen the outer surface 118 of the shoe becomes worn it is necessary that said shoe be moved outwardly from the cross-head in order that the latter will move snugly between its guides (not shown) and this is accon'iplished by moving the shank 120 by means ot` the rod 12T toward the forward end of the cross-head. This movement causes the wedge elements 123 and 124 to t'orce the surfaces 111 and 125 apart and thus adjust the shoe to the proper position. Previous to such adjustment the bolts 115 must be loosened to permit a rearward displacement ot the shoe on the cross-head. lVhen the shoe has thus been laterally and longitudinally displaced by relative movement thereon of the wedge members, the nuts on the rod 12T are again tightened, and the adjustment is thus maintained.

It is to be observed that the provision of the shank 120, as shown, and the two sets of inciined elements thereon, insures that the outer wearing surface of the shoe will always be parallel to the longitudinal axis of the cross-head. Furthermore. the under surfaces ot the shank and inclined elements afford a substantial arca of contact with the have ot' the cross-head groove and will prexert roel-ing or chattering otz the shoes on the crois-head.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is:

1. In a device ol' the character described, in combination, a cross-head and a slipper mov- :ibi e longitudinzfilljY ot the cross-hea d and treely removable therefrom at all times, means for causing said slipper to move laterally of the crosshead upon a relative longitudinal movement between the two, and an angularly displaceable pivoted member ior setting up such relative movement.

2. In a device of the character described, in combination, a cross head, and a slipper freely removable therefrom at all times, and means for giving said slipper a movement laterally of the cross head including surfaces on the slipper and cross head in direct engagement with each other and an angularly displaceable pivoted member connecting said crosshead and slipper.

3. In a device of the character described, in combination, a cross head, and a slipper, and means for giving the slipper a movement longitudinally of the cross head comprising a pivoted member which during such movement has a threaded engagement with the slipper and a sliding engagement with the cross head.

L1. In a device of the character described, in combination, a cross head and a slipper movable relatively thereto, and separate relatively aneularly displaceable pivoted means displaceable relatively to said cross-head for moving said slipper in opposite directions.

5. In a device of the character described, in combination7 a cross head and a slipper, and means for varying the position of the two including coacting surfaces at each end of the cross head and angularly displaceable pivoted members for setting up relative movement between said crosshead and slipper.

6. In a device of the character described, in combination, a cross-head having a shoe whose surfaces are adapted to engage the lateral faces of the guide, said shoe being fixed to the cross-head against adjustment, a slipper separate from said shoe adapted to engage another face ot the guide, said slipper being freely removable at all times :from the cross-head, means for pulling the slipper along the cross-head, the cross-head and slipper being arranged and constructed to cause a lateral adjustment of the slipper upon a relative longitudinal movement of said cross-head and slipper.

7. In a device of the character described, in combination, a cross-head, a readily detachable shoe on said cross-head, an adjustable plate on said shoe, and an angularly displaceable pivoted means for retaining said plate in position on said shoe.

8. In a device ot the character described, in combination, a cross-head, a readily detachable shoe on said cross-head, a wearing plate on said shoe, and pivoted means angularly displaceable relative to the longitudinal aXis of said cross-head for adjustably retaining said plate.

9. In a device of the character described, in combination, a cross-head, a readily detachable shoe on said cross-head, a wearing plate supported by said shoe, and singularly displaceable pivoted elements for adjusting said wearing plate.

10. In a .device of the character described, in combination, a cross-head, a shoe for said cross-head, a slipper carried by said shoe, and provided with inclined surfaces engaging the shoe, and angularly vtilisplaceable pivoted means for moving .the slipper on said shoe.

11. In combination, a crosshead and a slipioo per, and means for giving the slipper movement relatively to the crosshead including angularly displaceable threaded members at opposite ends of the crosshead.

12. In a device of the character described, in combination, a cross-head, a shoe detachably secured to said cross-head and provided with abutment surfaces angularly disposed with respect to the longitudinal aXis thereof, a slipper supported by said shoe and provided with abutment surfaces complementally arranged With respect to the first mentioned surfaces, and angularly displaceable pivoted elements engaging said shoe and slipper' for retaining the latter in position on the shoe.

13. In a device of the -haracter described, in combination, a cross-head, a shoe detachably secured to said cross-head and provided with abutment surfaces angularly disposed with respect to the longitudinal aXis thereof, a slipper supported b v said shoe and provided with abutment surfaces complementally arranged with respect to the first mentioned surfaces, and adjustable means havingpivotal engagen'ient with said shoe and slipper for adjusting the latter on said shoe.

14. In a device of the character described, in combination, a cross-head, a shoe detachably secured to said cross-head and provided with abutment surfaces angularly disposed with respect to the longitudinal axis thereof, a slipper supported by said shoe and provided vvith abutment surfaces complementaily arranged with respect to the firsV mentioned surfaces`l said shoe and slipper being provided With recesses, and an angularly displaceable threaded element engaging said recesses for retaining the slipper on said shoe.

15. In a device of the character described, in combination, a cross-head, a shoe detachably secured to said cross-head and provided with abutment surfaces angularly disposed with respect to the longitudinal axis thereof. a slipper supported by said shoe and provided ivith abutment surfaces complementally arranged with respect to the first meutioned surfaces. said shoe and slipper beingrr provided with recesses, and an adjustable element pivolally engaging said recesses for adjustably retaining the slipper on said shoe.

1b. In a device of the character described, in combination. a cross-head. a readily detachable shoe on said cross-head, a Wearing' plaie on said shoe, and a plurality of bolts longitudinally disposed in the shoe and angularly dsplaeeable relative to the longitudinal axis of said cross-head for retaining said plate.

17. In a device of the character described, in combination, a cross-head, a readily detachable shoe on said cross-head, a Wearing plate on said shoe, and pivoted means angularly displaceable relative to the longitudinal axis of said cross-head for retaining said plate, said shoe, slipper and angularly displacealole means forming a complete unit.

FRANCIS NOR-700D BARD.

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