US1331918A - Chucking device for pistons - Google Patents

Description

v S. D. HARTOG.

CHUCKING DEVICE FOR PISTONS.

APPLICATION FILED MAR. 23, 1918- 1,331,918. Patented Feb. 24,1920.

attached to theaface plateby screws 3 pass- UNITED. STATES PATENT OFFICE.

STEPHEN D. "HARTOG OFST;LOUIS,*MISSOUBI,4ASSIGNORTOS. D. HARTOGMANUFAC- -TUBING COMPANY, IOF ST. LOUIS,"1MISSO-URI, .A CORPORATION.

.cHUcKING DEVICE Eon. PISTONS.

'a pncationfilea'mmh'zs, 191s; serierno. 224345;

V to-receive piston rings. "-Thesegrooves,&how-

ever; become worn, especially whereeccentric rings arensed; and this requires that-the grooves be refinished or -machined. I Such istons are;however,provided with connecting-rods, and in order to permit the; piston to be-chiickedor held; iii-an ordinary jwork holder; it is .necessary to detach the connecting rod 'fror'n the-piston this, however, in volves considerable laborand' expense.

One oftheobj ects Iof this invention, there- 'fore ,'i's to provide a" chucking device, which is adapted to receive andhold a piston 5 with its attached'connectingarod inplace.

- A-no'ther object is :to provide a deviceot. this kind-"adapted for pistonsand connecting-rods ofzdifierentsizcs.

PFurther objects vvillfappearfrom the detail description, taken in connection 'Withthe accompanying? drawing, --in which *Fi'gure't is-a side elevation of the chucking device or work holder-embodying ithis, pp I be accomplished when the receiving element is removed from the carrier .16-+7.

invention; and a a p Fig.2 is a section "on the line, 2 2,Fig. 1. r Referring toithe accompanying drawing 1 designates .a -baseadapted for attachment to" a' face plate 12 of a lathe, this base being ing' through enlarged' holes in the base, and

threaded intothe face plate, and inorder to center the base on the face plate, this 1 face plate isprovided-With.arcentering lug 5,

adapted to" engage a corresponding ole or aperture in'the base.

Formed on or attached topthehase are a pair of side, members 6 which terminate in "a v cylindrical support or guide .7 which is threaded toi'receive afithread'ed collar or clamping element 8; and 'vvhi'ch isfiiiished ing e1ernent8'wi11 adapt'the'device for coninteriorly to provide a "guide for a cylindrireceiving element 10. Theelements 8 and i Specification of'Lett ers Patent.

receive a piston of a certain size, the annusuch a; piston" being shown at l3. ce vmg element 1s further slotted. as shown at 14,{ to receive theconnecting rod 15, and thissiotli is continuedthrough the guide rod-15.; i Byshifting t connecting rod, the receiving element 10 is Patented Fenei, 19 20.

1Ohave cooperating bevel faoesil, so to center andsupport the receiving element 10. This receiving element 10 islprovidedwith a series of annular seat-s12, each a'daptedito lar se'at being aflittle larger than the iston,

heflfce flange 9, so as to" permit the receiving ele- -ment to" be placed on andover the connect 'ing rod. In-practice,'the slot 14' is enlarged at 16 tothewidth of theiargest connecting 'rodfor thejlargest pistonpwhilethe, bod of the slot 14 need then only be made of a Width corresponding to the thickness of the lar nest connecting rod. j The clamping elementB as an enlarged rib 17 ,--vvhich is knurled on'its outer face, and Which may also be provided with a ertnres'18, adapted to be engaged by asuita lewrench. o a a The side members 6 are'provided with pairs oflalinedapertures 194 and 20, adapted toreceiveaplng' 21 which, in order to permit its removal orinsertion in either pair of Mined-apertures, is providedwith a knurled head Thisp1ug' 21 is adapted-toengage the crank pinwbearin 2?. on the I connecting he plug to either alined pairof apeitnres 20, the device is adapted for connectingrods of. different lengths.

. In ordertochuck a'piston and its attached placed over the connecting rod, which i can I The ping 21' is then passed through the center set ofapeitures 19,-and the crank-pin bearing.

The piston being'seated inthe receiving ele- --mentw10,'thenclamping element Sis rotated, thereby causing the axial. movement, of the receiving .Ielement' 10 to clamp the. piston j firmly in itsseat; the piston canthen be inabhined. After the machiningh'as'then bee'n'lOO carrier, thispiston can .be removed from its 105 receiving element through the slot 14.

' ln'practice' the adjustment of the clampnecting vrods of variant lengths, but Where these 'connecting'rods vary considerably it 110 is necessary to shift the plug 21 to another pair of apertures in the carrier, and 1t is for this purpose that a plurality of pairs of apertures are'provided; There is, therefore,

provided in this device, means for taking care of minor varlatlons in length of con- "necting rods, and means for taking work of major variations. in lengths of connecting rods. In view of the fact that there are many sizes of pistons varying considerably ,1n their diameters, 1t 1s necessary to provide various seats for thesepistons. In

practice,-therefore, the receiver 10 is pro- 7 vided with a number of seats, and by pro- ,portin viding a number of these receiving elements, all sizes of pistons can be accommodatedon a single device, by keeping in stock a number of variant receiving elements. Due to the fact that the adjustment of the. receiv ing element must necessarily be considerable even within the major variations provided for by the different pairs of apertures 19 and 20, itis necessary, to provide means for supthe adjustable receiving .element in its di erent positions. It is for this purpose that the guide flange 9 is provided, which furnishes an extended bearing, and which furnishes a firm support for supporting the receivingelement in its different positions in its carrier.

It will, therefore, be seen that the invention accomplishes its objects. The device is one which is adapted to firmly chuck or hold a piston for machining operations without requiring the detachment therefrom of its connecting rod. The device is so constructed that a piston maybe readily placed in. position and removed, and the operations can, therefore, be performed with great rapidity. Moreover, this device is adapted to pistons of variantsizes. In view of the fact that the self-centered receiving element is centered on the carrier through the cooperating bevel faces 11 on the receiving element and the clamping elements,"

and in view of the fact that the carrier is 7 centered on the face plate by the plug 5 oooperating with the hole in the base of the carrier,1t is not necessary to waste time in the usual centering operations.

It is obvious that various changes ma be made in the details of construction wit out departing fromthe spirit of this invention.

It is, therefore, to be understood that this invention is-not to be limited to the specific construction shown and described.

Having thus described the invention, what is claimed is:

i 1. A work holder of the class described,

comprising, a carrier, means for seating a piston on said carrier, means for retaining the attached connecting rod, and means interposed between said seating and retaining means adapted to clamp the seated piston.

2. A work holder of the class described,

to secure the work to tation therewith.

rotation therewith, a receiving element mounted for axial movement on said carrier and provided with a work-receiving seat, a work retaining element mounted on said carrier and adapted to leave said seat unobstructed, and means for causing relative movement of said retaining element and said receiving element. to clamp the work.

4. A work holderof the class described,

comprising, a carrier adapted for. attachment to a revolving machine element and for rotation therewith, a receiving element 'lIlQllIlbOd' for axial movement on said car:

rier and; provided with. a series of. workrece vmg seats, av work retalnlng element and means for moving one of sa d elements relatively to the other to clamp the work.

5. A work holder of the classdescr-ibed, comprising, a carrier adapted for attach ment to a revolvin machine element and for rotation therewlth, a receiving element guided for movement in said carrier and provided with a work-receiving seat,workretaining means on said carrier and axially within said seat, and means for moving said element adapted to clamp the work.

6. A work holder of theclass described, comprising, a carrier adapted forattachment to a revolving machine element and for rotation therewith, a receiving "element guided for movement 1n said carrier. and

provided with a work-receiving seat, work reta nm I means and a shifting element mounte on saidcarrierand engaglng said receiving element, suchshifting element and retaining means being adapted to cooperate v said carrier for ro- 7. *A work 'holder of the class described,

having an extension guided in said carrier and provided with a work-receiving seat,

work retaining means and ashifting element mounted-on said carrler and engaging said receiving element, such shiftingelement and retaining means being adapted to cooperate to secure the work to said carrier for rotation. therewith.

8. Awork holder of the classdescribed,

comprising, a carrier adapted for attachmentfo a revolving machine element and for vrotation' therewith, a" receiving element mounted on said carrier and provided with a work-receiv ng seat, .a work retainer mounted on said carrier and adapted to .coniprising,' a carrier. adapted for attach- :ment toa revolv ng machine element and for rotation therewith, a receiving elementlie leave said work unobstructed, and means for moving said receiving element relatively to said retainer adapted to clamp the work.

9. A work holder of the class described, comprising, a carrier adapted for attachment to a revolvin machine element and for rotation therewith, a receiving element mounted on said carrier, said recelving'element guided for movement in said carrier and provided with a Work-receiving seat and with a work receiving passage, a work retainer mounted on said carrier, and adapted to engage that part of the work which enters said assage, and means for moving said receiving element adapted to clamp the work.

10. A work holder of the class described, comprising, a carrier, a receiving element mounted on said carrier, said receiving element guided for movement in said carrier and provided with a work-receiving seat and with a work receivin passage, a work retamer mounted for a ustment on said carrier for engaging that part of, the work which enters said passage, and means for clamp the work. o

11. A work holder for an article having a projecting portion, such holder being provided with a seat for the body of said article and a passage for the pro ecting portion, adjustable means for engaging and holding against withdrawal of such projecting portion, and means interposed between sa1d engaging means and the seat for producing a seating thrust upon said body portion.

12. A work holder for an article havin a projecting portion, such holder havmg means for attaching the same to a revolving machine element and being provided with a seat for the body of said article and a passage for the projecting portion, and ad justable means for engaglng and holding against withdrawal of such projecting portion and producing a seating thrust upon said body portion.

moving said receiving element adapted to In testimony whereof I afiix my signature 7 this 9th day of March, 1918.

' STEPHEN D. HARTOG.

Images