US2191639A

US2191639A - Engine

Info

Publication number: US2191639A
Application number: US231711A
Authority: US
Inventors: Carl F Bachle
Original assignee: Reconstruction Finance Corp
Current assignee: Reconstruction Finance Corp
Priority date: 1938-09-26
Filing date: 1938-09-26
Publication date: 1940-02-27
Anticipated expiration: 1957-02-27

Description

Feb. 27, 1940. l c. F. BCHLE ENGINES Filed sept. 26, 19:58

particularly. to the cylinder rocker box-cover assembly especially Y adapted box cover is constructed yand `arranged for cooperative assembly with a cylinder head strucl rture in such away as to house the valve actuating r 'Patented Feb. 27,` 1940.

" I Carl F.. Bachle, Grosse PointavMi'ch., oasvsignor, by V mesne assignments,to Reconstruction lFinance Corporation, Detroit, Mich.;A ai corporationof `f the'v United StatesA l n i.Appliauonseptember2e,.1938, serisiNo. 231,711 y.

' 4c1aim s. (ci. 12s- 90) `This invention relates `to enginesl and more for a radial air cooled aircraftengine.A` Y -More particularly, the present.' tains to a novel assembly in `which the rocker mechanism, particularly the rocker arm,y and .to

insure proper assembly at all times by limiting the axial displacement of the rocker' arm shaft.

j The present invention provides Ifor an improved construction in'which ready access may tion chamber be 'had to the valve operating mechanism, particularly the valvelrocker arm, and furthermore, provides a verycompact assembly. p

For a more detailed description of the present invention reference may be had to the accompanying drawing illustrating a preferred embodiment of the invention, and in which:

` Fig. l is a fragmentaryvertical' sectional'view of an engine illustrating the present invention,

Fig. 2 is a fragmentary vertical sectional view taken substantially on the line 2-52 of Fig.

Fig. 3. is a plan sectional view taken substantially on the line 3`3 ofv Fig. 2. j

For purposes of illustration, the present invention is shovvn'I in conjunction with an engine of the radial air cooled vtypeywhich is usually provided with` a plurality'o'f' radially `extending cylindersv l0. havingcooling ns II.A A piston l2'is "operable in said cylinder and cooperates :with the structure` AI,3 to define a'combus- I4..4 The cylinder head structure is provided with the standard valve guides for cylinder head supporting the intakeV and exhaust valves I5 'and o is further provided with an extension I6 forming I forl lugs or supports the lower base portion ofthe rocker'box, Which vextension also supports the usual push rods I'l.l

The present vinvention pertains particularly to the construction of Ahousing the valve operating mechanism.

'Thev cylinder head IB which are provided with axially aligned drilled holes I9 l'for Supporting la 'rocker arm shaft `20. The rocker armsfZI are Apreferably mountedbetween the supports I8 and arepivotally supported on v,said rocker armshaft 20. Said yrocker arm shaft 20 ispreferably con#- structed of-f such a length as to arrange the ends thereof substantially flush with the'outer faces 22 of the rocker arm supports I8' and said .rocker arm" shaft or pin 20 is preferably arranged to head and associated f ciated with the cylinder vsubstantially circular inplan as shown in Fig. nventon per cylinder head extension yflattened portions 25 bosses Z6 `which project f the cover and are preferably the rocker box and the covery extension |16 is provided with l jecting outwardly beyond haves snug at within cheminee holes Ie or said rocker arm supports:18.1" A-jcover' 23 s-- asso- 3 and the said cover'is. preferably secured tothe o bolts 2%. Y l. v l

"in orderto eliminateall chances of the rocker arm shaft or pin i9 from being displaced axiallyor beingv shifted an undue amount, the rocker 'box cover 23 is substantially flattened as at at points substantially` diametrically opposite each other see Figs. 2 land 3).-` These of the rocker box cover are provided with 'headextension and is by means` of a plurality y inwardly from the flattened side Wall portions of formed with a het machined @face 21 vvhich is `positioned closely adjacent to shaft or pin I9. is provided a very tvveenthe ends of of' these bosses iipand It Will thus be noted that there minimum clearance A28 bethat very little movement is permitted of the shaft or pin I9 relative to the supports IS and thus it will be noted that at all times a maximum amount of bearing surface is maintained for lsupporting the shaft or pinv i9 in said supports I8.

the end faces 'of the rocker arml the pin I9 and the faces 21'.'y

Thepresentconstruction permits for economical manufacture of these parts since it is possible' to very economically machine these parts vandrea'dily fit the same together when assem-g bling the engine.l Furthermore, 4the struction facilitates maintenance of the valve operating mechanism since removal of -the cover assembly exposes this Whole assembly and per'- mits readyjaccess to be had to said mechanism.y

It will be apparent to those skilled in the art to which this invention pertainsthat various modifications and changes may be made therein Without departing from. the spirit of the inven-` tion or from the scope of theiappended claims. I claim: j

, l 1. An 'engine structure having in combination,

means supported by said a cylinder head, valve cylinderfhead, valve actuating mechanism `including a valve actuating rocker arm, rocker arm supports carried by.; said cylinder head and prof the outer end of said cylinder head,a `pin supported by said rocker `arm supports and pivotally supporting said'rocker arm, and a rocker box cover secured to said cylinder head and housing said rocker arm supports, said rockerv box cover having inwardly which substantially houses the entireroclier arm4 present conprojecting bosses axially aligned with said pin and positioned closely adjacent to the end faces of said pin for limiting axial movement of said pin.

2. Anengine structure having in combination, a cylinder head, valve means supported by said cylinder head, valve actuating mechanism including a valve actuating rocker arm, rocker arm supports carried by said cylinder head and projecting outwardly beyond theouter end of'said cylinder` head, a pin supported' by said rocker arm supports and pivotally supporting said rocker arm, and al rocker box cover secured to said cylinder head and housing said rocker arm supports, said rocker box cover Aconstructed substantially circular in plan and having inwardly pro- `iecting bosses axially aligned with said pin and positioned closely adjacent to the end faces of s aid pin for limiting axial movement of said pin.

3. An engine structure having4 in combination,

a cylinder head, valve means supported'by 'said` said rocker box cover,- constructed substantially circular in plan and having a pair of bosses projecting inwardly vfrom substantially diametrically opposite portions of the side Wallof said cover,

said bosses being axially alignedv with saidfpin and positioned closely adjacent to the end faces of said d pin for limiting axial movement of said pin. v i i i a cylinder head, valvemeans/supported by said 4. An engine'structureihaving incor'nloination, I

. 10" i cylinder head, valve actuating mechanisminclude inga valve actuating rocker armrocler arm supports carried by said cylinderfhead and projecting outwardly beyond the outer endof said cylinder head, a pin-supported by said rocker arm supports and pivotally lsupporting said yrocker arm, and a rocker box cover secured to' said cyly.inder head and housing said rocker arm supports, y `said rockerv box cover constructed 'substantially circular in plan and having a pair of bosses pro-3y jecting inwardlyrom substantial!yl 'fdiametri'cally opposite portionsof thefrockerfbox cover, `side'v an inner irat face,` d with 'said in`, the

Wall, said bosses each having substantially axially aligned faces yof said y,bosses being located` closely adjacent vto the vend faces` of said pin. for' limiting d l axial movement of saidpin. l l CARL BACHLE.