US1154512A

US1154512A - Bearing-adjuster.

Info

Publication number: US1154512A
Application number: US84373114A
Authority: US
Inventors: John T Hay
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-06-08
Filing date: 1914-06-08
Publication date: 1915-09-21
Anticipated expiration: 1932-09-21

Description

J. T. HAY.

BEARING ADJUSTER.

APPUCATION FILED 1UNE8. 19141 2 SHEETS-SHEET1.

Patented Sept. 21, 1915.

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BEARING ADJUSTE APPLICATION FILED JUNE 4 1,154,512. Patented Sept. 21, 1915.

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COYLUMBIA PLANOGRAPH c0" WASHIN GGGGGGG c JOHN T. HAY, OF UNION CITY, OHIO.

BEARING-ADJUSTER.

Specification of Letters Patent. Patented Sept. 21, 1915,

Application filed L1 une 8, 1914. Serial No. 843,731.

To all whom it may concern:

zen of the United States, residing at Union City, in the county of Darke and State of Ohio, have invented certainnewand useful Improvements 1n Bearing Ad usters, of

which the following is a specification.

The object of this invention is automatically to so adjust the bearing-brassesof a.

cross-head pin or crank-pin of a pitman in proportion to the wear of any one or all of the brasses as to maintain a given tightness of journals at both-ends of the pitman and to simplify and make more positive the mechanism heretofore used for that I purpose. f V 1 The object, also, is to provide means. for correcting looseness due to the spring of the metal in said automatic takeup mechanism.

I accomplish the above and other objects which will hereinafter appear, by the mech anism illustrated in. the accompanyingdrawings, in. which Figure 1 is a view 111 side elevation and partial vertical section of a pitman with my invention in operative position for adjusting the bearing-brasses at the cross-head pin andcrank-pin of a pitman, the lever contact of the operative mechanism being against the cross-head pin in this illustration. Fig- 2 is a crosssection onthe'line 2-2 of Fig. 1. Fig. 3 is a. section on the line 33 of Fig. 2. 'Fig. 4e'is a side elevation of a modified, form wherein only one bearing lever against thepin, is used, and Fig. 5 is a cross section on the line 55 of Fig. 4. 'f -i Like characters of reference indicate like parts throughout the several views of the drawings.

In a steam-engine, because the expansive action of the steam is exerted against both sides of the piston, that is, in alternate opposite directions, it ,is' necessaryto apply the automatic journal-box take-up at the cross-head pin of a pitman, but with internal combustion engines where the driving impulse is only againstone side of the piston or in one direction,, the automatic journal-box take-up maybe applied at the crank-pin. In the drawings I have shown the automatic take-up mechanism as being operated by contactw-ith the cross-head pin,

as for steam-engines, but this is only by way of illustratiomand it will be understood that 1 for internal combustion'engines thejcontact j of the automatic mechanism may be against Be it known that I, JOHN T. HAY, a citi-.-

the crank-pin at the other end of the pitman.

The cross-head pin at is mounted between the journal-

brasses

5 and 6, and the crank pin 7 is similarly mounted between thejournal-brasses 8 and 9. The

brasses

5 and 6 are mounted between the stem-members 10 of a stirrup, the outer ends of which stem- 14 thereby completing the frame or body portion of the pitman. All of the

brasses

5, 6, 8 and 9 have a'close sliding fit between their adjacent pair of stem-members, 10 and 12' respectively, and it will be noted that the brasses are shorter than the diameters of the pins with which they respectively contact, so that all of the material on the sides of'the brasses against the respective pins eland 7 will be worn away by friction against the pins.

It is not essential that the axes of the two pins 4 and 7 be maintained the same distanceapart' because there is room enough in the cylinder of elther a steam or internal combustion engine for the stroke of the piston should the distance between the axes of said pins be somewhat increased. This permits me to adjust both of the inner brasses 6 and 9 toward their respective pins sufficiently to keep all of the brasses tight, and I will now describe the mechanism by which said brasses 6 and 9 are automatically moved toward their respective pins to take up all" looseness due to wear and to maintain a predetermined tightness of said pins in their re spective journals. 7 V

'Mounted with a close sliding fit between the stem-members 10 is a block 15 which contacts the journal-brass6 on one side and is provided on its opposite side with a screw- U threaded socket 16 within which the corres'pondingly screw-threaded end of a shaft 17 is screwed. The opposite end of the shaft 17 bears against the journal-brass 9, or more frequently against shims 18 interposed between the journal-brass 9 and the end of the shaft 17 The shaft 17 has a spline 19 extending longitudinally of. one side and mounted on the shaft 17 is a split sleeve 19, the splineoi' 4 the shaft entering the split in the sleeve to pivoted to the lower stem-member 10 at its junction with the cross-member 11 of: that yoke. Theend of the rod 2% which is passed through the bent lever 25 is screw-threaded and receives a nut 26. Between the nut 26 and'the adjacent end of the bentlever 25 is a spirally wound spring 27 which exerts 2.1

longitudinal pull on the rodfl2e determined;

by the position of the nut 26 on .the threaded endof said rod.

The bent lever .25 has an extension .28 in the direction of the cross-head ,pin 4:, and this extension may be made .to contact directly with the pin, but preferably it is provided with a friction-wheel 29 which makes the direct contact against pin 1.

Pivoted to the same stem-member 10 as the bent lever 25 but on the other side vof the. cross-head pin 4, is a bent leverSO. One endo-f the lever 30 is connected by a linkbar 81 with the pivot 23 of the pawl 22. The other .end of .the .bent lever- 30 terminates above the cross-head pin 4t and is provided near this end with a transverse opening through which a rod 32 passes. The end of the rod 32 which passes through the bent lever 30 is screw-threaded to receive a :pair of

nuts

33 and 34, which are placed on opposite sides of theend of lever30 and theend of lever 30 between said nuts terminates with a round head to permit of a lateral movement of this end ofthe lever, between the two nuts, without being bound between the nuts which are screwed up to make a close 'fit against said rounded head. The opposite end of the rod 32 is pivoted ,to the bent lever 25, as shown in Fig.1. Theupper extension of the bent lever 30 is provided with a lateral extension 28 in the direction of cross-head pin i .and this -extension 28 has a friction-wheel 29 to contact with the cross-head pin 4.

Any undue looseness of the journalbrasses at either end ofthe pitman will permit of a. longitudinal reciprocating movement of thepitmanas a'whole with eachrevolution of the crank and stroke of the p'iston which will impart a vibratoryzmovement to'the bent levers 25 and 80, This .moves't he dog 22 into position to frictionally engage the wheel 20 and rotatessaid wheel the fraction of a revolution thereby correspondingly Mounted on rotating .the sleeve 19 and screw-shaft 17 causing the shafit 1,7 to screw out of its socket in block 15 against the bearing-brass 9 or -shirns1; 8., :and thereby tightening the bearing-,brasses at both ends of the pitman.

There-verse travel of the frictions-wheel 20 during the vibrations of levers 25 and 30 which wouldhave a tendency to loosen the journal-brasses, is prevented by a pawl 35 pivoted between a pair of plates-36, also loosely mounted on sleeve 19. The pawl 35 ishel'd normally in locking engagement with the friction-wheel'20by a spring 37 wrapped around a fixed bar 738 and located between the pawl '35 an adjustable nut on the threaded-end. of'the bar 38.

VVhilethe two levers 2'5 and 30 are desirable for engines where the journal-brasses of the pi'tman pins are required to run loose, for close-running journals such as are most commonly used, one of said levers may be and is omitted. Preferably the lever 30 is retained because it is shorter and consequently more rigid, and because it can be applied easier and to better advanta e .to

the pitman. Sucilra modification is shown in Figs; 4L and 5 wherein the extension of thelever 3Q above the pivot is only sufiicient to support the friction-wheel 29 against pin-4. Ihe's prin g 27 around rod 2 & has its inner bearing against a lug extension 42 from stem 12 of one of the stirrups. Fig. 4 also shows the use ,ofshims 40 and 41 between the respectiv ends of th st mps, and theiradjacent 'brasses to correct excessive ep at on fitlh .p ns 4 and du to wear} The shims. aIeinserted hand as needed! I have found O I e error in the operation oiflmy invention .in practice which "I believe to be largely due {to the elasticity .of the metal from which the mechanism as above described is. constructed, and because of this error I was unable to, secure a regulated tightness of the jonrnal-brasses until "I discovered that by flattening the pin in the path of contact between it and the rollers 291 could secure a constant limited vibration of lever 30 which had the result of correcting the error above referred to. This n and theesiibstitution of equi a nt as r- 7 having cylindrical sides and also having a cam portion, of a pair of bearing-brasses disposed on opposite sides of the cylindrical portion of the shaft, means to move the bearing-brasses toward the shaft, and means contacting with the cam portion of the shaft for actuating said bearing-brass moving means.

2. In a journal for rotary shafts, a pair of bearing-brasses dis osed upon opposite sides of the shaft, screw means to move the bearing-brasses toward the shaft, a wheel through which said screw means passes, pawls making driving contact with said wheel, and means contacting with the shaft for actuating the pawls.

V 3. In a journal for rotary shafts, a pair of bearing-brasses disposed on opposite sides of the shaft, screw means at right angles to the shaft to move the bearing-brasses toward the shaft, a wheel through which said screw means passes, pawls making driving contact with said wheel, and means comlprising a lever contacting with the shaft and connected with the pawls to actuate the pawls.

4. The combination in a pitman with the cross-head and crank-pins, of a pair of bearing-brasses for each pin disposed on opposite sides of the pin in each case, screw means extending longitudinally of the pitman to move both inner bearing-brasses toward 7 their respective pins, a wheel through which said screw passes, pawls making holding contact with said wheel, and means contacting with one of the pins for actuating the pawls.

5. The combination in a pitman with the cross-head and crank-pins, of a pair of bearing-brasses for each pin disposed on opposite sides of said pins, screw means extending longitudinally of the pitman to move both inner bearing-brasses toward their respective pins, a wheel through which said screw passes, pawls making holding contact with said wheel, and means comprising a lever contacting with one of said pins and connected with the pawls to actuate said pawls.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this 9th day of May, A. D. one thousand nine hundred and fourteen.

JOHN T. HAY. [11. 8.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.