US1674301A - Crosshead puller - Google Patents

Description

June 19, 1928. 1,674,301 F. l. ROWLEY CROSSHEAD FULLER Filed Jan. l5, 1926 2 S eets-Sheet l v gh mmnlo'p Frederwk LBOWZey 85 k i June 19, 1928.

F. l. ROWLEY CROSSHEAD FULLER 2 Sheets-Sheei' 2 Filed Jan. 15, 1926 Patented June 19, 1928.

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Application filed January 13, 1926. Serial no. 80312.

, My invention relates to cros shead puller wherein it is desired to pull the crosshead from the piston rod in a locomotive. It is very apparent that from time-to time itis 5 necessary to make suchclianges and to remove the crosshe'ad from the piston rod so that an engine canbe repaired, andit is important that this bedone in the shortest possible time that the engine will not -be laid up longer than is necessary and without taking the engine all apart at the crosshead connection.

A feature of the invention resides in a crosshead puller'which is provided with "a floating crosshead'pinso as'to preventst-rain on the back'wall of the cro sshead in applying sufficient force to remove the pistonrod therefrom. i i

It is also a feature of the invention to provide a double puller working from both ends forcing the piston rod out of the-crosshead by pressureiagainst the'end of the Pieton rod, while force is applied against the cross head to push the same ofi'lofthe piston rod at the same time'that the force is exerted against the inner end of the piston rod. This is an important feature of my invention.

My invention includes adjustable connecting rods or side arms whichconnect theends of the crosshead puller together in a manner so that an operating member is held extending through the crosshead transversely and held approximately in a floating nature in relation to the crosshead'lso' that no strain is exerted against thecrosshead hole, and permit the adjustingof my crosshead puller to various si'zed locomotives'lso that the adjustments provided by my crosshead puller are sufficient to take in a large scope of l0c 0 motives, making my device verypractical for such use. The majority of locomotives have a uniform construction or compara tively so in relation'to the crosshead pin hole and the piston rod so that my adjustable crosshead puller is readily adaptable to any of these makes of locomotives.

A feature of invention resides in a crosshead puller and connecting parts which are machined in a manner to fit together properly and so as to prevent theflputting together of these parts incorrectly, thereby making a very simple device which can be operated readily. It is a feature-that my crosshead puller can be operated from either end or from both 'endsait the same time by applying power to the, screw members in each end. This is accomplished by large wrenches or'other suitable means of apply ing poiver togthe screw members'whi c'h applies pressure to the crosshead and piston rod in a manner to separate the same; I'm

elude a thrust ball bearing of other suitable hearing which eliminates friction between the end of the collar which works against the inner surface or the crosshead orbo'ss portion of the vcrosshead pr'ojecting'toward the piston rod and which receives the piston rod therein. The bearing member permits the collar to be turned more readi-lyQ It is apparent that my collar member can be used either with or without the thrust ball bearing and that the'be'aringsmay be of a ball nature or roller bearing so as to eliminate friction to a large degree i fI-Ieretofore it has been quite commonly practised in the removing of cro'sshea-ds from piston rods to rely on the back Wall of the crosshead pin hole, which is the weakest pant of the crosshead, to withstand all thestrain necessary ito pull the piston rod from the crosshe'ada By my floating crosshead pin which is supported by the sideconnecting arms or linksI entirely overcome this method of remov ng the piston rodand transmit the strain to the connectors and the floating pin extending through the crosshea-d pin hole. With my'crosshead puller no' cracking in crossheads will be aresult of removing the piston rod, as is often the case withthe old method .used heretofore in I so far as I know. My method also overcomes the necessity of reaming crosshead pin holes on account of being-"stretched in. the removal 'ofuth'e" crosshead from .the piston. rod by the old method. My crosshead puller is harnessed around the crosshead in a manner to take all the strain of removing or pullingthecrossheadfrom theipistoii rod.

A very important feature of my cross? head puller resides in the pin member which extends through the end of the crosshead and is threaded into-the floating c pin in a manner so' as to transmit pressure against the inner end of the piston .rod to force the same out of the crosshead when. pressure is applied to the pin. When this pin isscrewed up tightly against the piston rod, :if (the piston rod does not give under the'pressure of the pin a blow with sledge hammer against the Outer end of the pin or headio fthe same will ottentimes jar thepiston rod (f ee of the crosshead. My crosshead puller is of extreme importance in the use of locomotives at this time because of the increase in the size of the locomotives and of the larger crossheads and piston rods which are necessary with these high powered locomotives that are now being used by railroads.

' These features together with other details of construction and particular arrangement of the parts will be'more clearly and fully set forthin the specification and claims.

In the drawings forming part of this specification: J V

Figure 1 is a side view of my crosshead puller as it would appear attached to the side of a crosshead of a locomotive; a part of which is broken away. a

Figure 2 is a plan view of my crosshead puller attached to a crosshead of a locomotive, partly illustrated in cross-section.

Figure 3 is an end view along the line 3-3 of Figure 1. 1

Figure 4 is a detail of one of the connecting links or arms. Figure 5 is a detail of the end stop pin. Figure 6 is av detail of the crosshead floating pin removed from the same. I

Figure. 7 shows the piston rod collar with the parts of the same separated slightly to show that the parts are separable from each.

other.

In the drawings my cross head puller is provided with a collar portion A and a crosshead floating pin portion B which is adapted to extend through the crosshead pin hole'10 in a manner so as to be held practically in a floating position through the crosshead C so that the piston rod D may be readily removed without causing any strain to be exertedagainst the crosshead C at a 13 in a manner so that the collar A can be positioned about the piston rod D and secured together or be separated so as to be removed from the rod. The portions 12 and 13 are formed with an inter-locking edge which is provided with rabbeted portions 14' which interlock so as to hold-the parts 12 and 13 in perfect alinement and properly connected together. This is important in the collar construction because the inner surface The collar portions 12, and '13 are held together by the pins 16 which are carried by the lower portion 13 and the wedge keys 17 which extend through slots in the pin 16 in a manner to lock the portions 12and 13 rigidly and securely together. Dowel pins 18 are also provided to hold the parts 12 and 13 in alinement so that when the parts 12 and 13, of the collar A are secured together; the collar A is as if it were one piece in operation. a I

The rigid and accurate construction of the collar A permits the thread 15 tofunction in a manner to engage the thread 20 on the collar nut 21 which is formed intwo half portions having a suitable rabbeted edge 14 and similar dowel pins 18 which hold the half'parts in perfect alinement so that the collar nut is adapted to thread perfectly into the collar A.

The collar A is provided with projecting lugs 22 which are formed with a semi-circular end 23 on one side over which the yoke 24 of the connecting arms or links 25 engage. 1

point 26 so that the yokes 24: will have a' tendency to draw inwardly on the lugs rather than slipping off of the same when the crosshead puller is in operation. of the lugs 25 is threaded at 28 in a manner so as to make an adjustable connecting means on either side of the collar A.

Each.

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The threaded end 28 of the links or arms 25 is adapted to extend throng-l the slots 29 formed in the ends 30 of the crosshead pin 31; 'The crosshead pin 31 is shaped in a manner so as to extend through the cross head pin hole 10 freely and to provide a floating connection for the adjustable ends 3 of the rods or links 25. By means of suitable nuts 32 which bear against the plates 33 the links 25 are adjusted in a manner so as to cause the plates'33 to bear against the flattened side 34 of the lugs 30 of the cross-' head pin 31. Each of the plates 33 is provided with'a tongue 35 which fits in a similar groove formed in the flattened surface 34 of the lugs30 so as to hold the plates firmly against the lugs 30 of the pin.

The crosshead C is formed with an opening 36 which extends through the web 37 of the same and which is of ordinary construction in the make up of the crosshead for a locomotive. This opening 36 extends through the crosshead and into the shank 38 of the crosshead to connect with the tapered piston rod receiving opening 39 formed in the shank or projecting boss of the crosshead C. The piston rod D is tapered at 40 in a manner so as tofit into the opening 39 and is held in the ordinary manner therein, by a pin wedge not illustrated'in the drawings and of ordinary well known construction. The connecting rod D must be 'held absolutely tight Within the? "crosshead C andthereit'ore the tapered end 40 of the piston rod is wedged very securely into the tapered opening 39'so that it is in position to disengage the same Without con siderable force-against the 'crosshead C and the rod D underordinary conditions, In fact,some of these piston rods D are so tightly connected in the crosshead that the Web 37, Which is practically ,the Weakest threads 44 along the major portion of the same at the end opposite the head 43. This Wedge pin is adapted to extend through .the opening 36 in the crosshead and is threaded 'at 45 through the crosshead floating pin 31. The threaded end 44 of the pin 42 is pro.-

vided with a projecting centering point 46 which 'is'adapted to "engage in the center recess of the tapered end '40 of the; piston rod D. v R I i The construction of my crosshead puller is very simple so that in use the collar A may be readily assembled around the piston rod D adjacent the .boss38 of the'crosshead C, and the collarnut2l inserted Within the L same and turned up against ,theIthrus't ballbearing 48 which is inserted between the end of thecollar 21 and the faced end 49 of the boss 38 on the crosshead vC. The adjustable connecting arms orlinks ,25 are'then attached to the lugs 22 and inserted through the pin 31 which has been placed .to extend freely through the opening 10 of the crosshead C, and'by adjusting the nuts "32 atter the wedge pin 42 has been set up against the end of the piston rod D, asfillustrated in Figures land 2, the nuts 32 are drawn tight enough .to hold the crosshead floating pin '31 extending freely through the opening 10 and Without engaging or hearing against the sides of the same excepting as (to support the weight of the pin and the'ends of the links 25. In fact, the supporting of the pin 31 through the opening '10 of the crosshead C is only temporary until the Wedge pin 42 is drawn tight/against the end of the piston rod D, and then the pin 31' extends practically in a floating position through the opening 10.

After the connecting links 25 have been adjusted to the desired length to hold the pin 31 centrally through the opening 10 and to draw the thrust bearing 48 up against the face 49 of the boss 38 of the crosshead C, by means of suitable Wrenches at 42 the colla r 21 can be operated 'to bring pressure against ithe end of the piston rod D and at the sametime against the face 49 of the 1 crosshead C, thereby forcing under extreme.

pressurethe piston'rod D out of the recess 39. I If for any reason the piston rod D does not readily respond tothis operation when the collar 21 and the Wedge pin 42 are drawn tight, then by a sledge hannnerbl'ow against the head 43. of the pin 42', it Will be foundthatthe piston rod 1) Will readily dis- :engage from the crosshead C. Itis not. often that is necessary to strike thepin 42, for as a rule. the crosshead G Willxbe readily pulled vfrom the piston rods D. The V adjustment of the links oi-arms -25 permit,

my puller to be readily adjusted to different sized locomotives and crossheads and "the operation is very effective being of a simple nature so that the I crosshead V puller can? be quickly attached and removed. In fact, I

have found that mycrosshead puller operates so effectively as to take only a very short time to completely. remove the, crosshead from the piston rod. Inmy crosshead puller no pressure is exerted against the weak portion of the crosshead, :but rather to the contrary the pressure is exerted and directed to the body and face 49 of the crosshead so as .to operate with such force as to readily separate the piston (rod from the same. In operation the connecting rods 25ers heldbn the lugs 22by the inclined surface 26 so that they Will not separate from 'the same, and I provide a suitable handle E onthe upper portion 12' ofthe collar A so that the collar can belifted in separating it from therod D. The thrust ball-bearing or roller bearing which maybe used, such as 48, eliminates the friction in the turning of the collar21 and thus permits my crosshead puller to operate very freely, While the pin 42 provides the necessary stop for engaging against the end of thepiston rod D With the centering point 46 holding the pin centrally in relation .to the piston rod. "lVhile I have illustrated a particular formation andconstruction of'my jcrosshead puller I desire to have' it understood 'thatthe illustrationis only suggestive of a means of carrying out my'invention and that the same canbe modified and the parts so 'arranged as to' fulfill the functions herein set forth and Within thescope of the for lowing claims. A i i I claim z 1. A ci'osshead puller having means adapted to be associated with a crosshead and piston rod in a manner to exert pressure against the extreme end of the piston rod to force the same out of the crosshead, bearing members pressing against the inner end of the crosshead, said means comprising a floating pin member adapted to extend through the crosshead and connecting rods extending on either side of the pin member to connect the same with said bearing members.

means coacting with said pin to permit pressure'to be exerted against the end of the piston rod without stretching the cross head at the pin hole.

3. A piston rod remover including, means adapted to engage one end of the crosshead of a locomotive, a floating pin adapted to extend through the crosshead, means connecting said pin with the means adapted to engage oneend of the crosshead, and means adapted to extend through said floating pin to transmit pressure against the end of the piston rod in the crosshead.

4. A crosshead and piston separating means comprising a member adapted to encircle the piston rod, a collar threaded into said member and adapted to bear against the projecting portion of a crosshead which carries the-piston rod, a cross head pin adapted to extend through the crosshead pin hole, adjustable connecting links adapted to connect the crosshead pin with said collar in a manner to hold the crosshead pin floating within the crosshead pin hole, and a'piston rod wedge pin threaded into said crosshead pin in a manner to bear against the inner end of the piston rod to force the same out of the crosshead.

5. A crosshead puller for locomotives including, means for engaging about the piston rod, anti-friction means for bearing against the crosshead, connecting means adapted to connect said engaging means extending about said piston rod with the end of said piston rod whereby when pressure is exerted against the end of the crosshead adjacent the piston rod, the piston rod and crosshead may be separated.

6. A crosshead puller for locomotives comprising a separable collar adapted to extend about the piston rod, a separable collar adapted to thread into said first separable collar and extend in a manner to bear against the inner end of a crosshead, wedge means and means for connecting said first collar to said wedge means adjustable in a manner to cause the crosshead to be pulled away from the piston rod when said second threaded collar is rotated against the crosshead.

7. In a device of the class described including, a collar adapted toextend about a piston rod, a collar nut adaptedto be threaded into said collar, a crosshead pin extending through the crosshead, connecting means adapted to connect said collar;

with said crosshead pin, said connecting means causing the crosshead pin to have a floating relation through the crosshead and means bearing against the end of the piston rod carried by said crosshead pin to cause a crosshead to be pulled from the piston rod whensaid collar nut is rotated against the crosshead.

8. A crosshead puller including, a pin adapted to extend through the crosshead, means for holding said pin in floating relation through the crosshead, and means adapted to connect said holding means with the end of the crosshead opposite the end of the piston rod to bear against the crosshead. in a manner so as topull the crosshead from the piston rod.

9. A crosshead and piston separating means including, a split collar member adapted to extend about the piston rod, a collar nut adapted to be threaded intosaid collar member, connecting links, lugs extending from said collar member adapted to receive one end of said links, a crosshead pin adapted to extend through the crosshead adapted to bear against the boss of the crosshead to hold the piston rod whereby when pressure 1s exerted against the piston rod and crosshead by both said means they Willbe separated one from the other.

11. A crosshead and piston separating device for locomotives including, means adapted to engage against the portion of the crosshead in which the piston rod is secured,

and means connected to said first mentioned outside of the same will separate the piston rod and crosshead.

FREDERICK I. ROWLEY.

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