US3364798A

US3364798A - Floating reamer holder

Info

Publication number: US3364798A
Application number: US528170A
Authority: US
Inventors: Howard N Girardin
Original assignee: Empire Tool Co
Current assignee: Empire Tool Co
Priority date: 1966-02-17
Filing date: 1966-02-17
Publication date: 1968-01-23
Anticipated expiration: 1985-01-23

Description

Jan. 23, 1968 H. N. GIRARDIN FLOAT ING REAMER HOLDER 2 Sheets-Sheet 1 Filed Feb. 17, 1966 INVENTOR HOWARD N. GIRARDIN BY QM 11M 4 0m ATTORNEYS Jan. 23, 1968 H. N. GIRARDIN 3,364,798

FLOATING REAMER HOLDER Filed Feb. 17, 1966 2 Sheets-Sheet 2 INVENTOR HOWARD N- GIRARDI N ATTORNEYS 14-14 of FIG. 12;.and

3,364,798 PatentedJan. 23, 1968 ice 3,364,798 FLOATING REAMER HOLDER .Empire Tool Company, Memphis, Mich. Filed Feb. 17, 1966, Ser. No. 528,170 10 Claims. (Cl. 77-3) This invention relates to a floating reamer'holder, andmore particularly to a novel reamer holder construction. It is the object of the present invention to provide a floating reamer holder, which isself-aligning, and selfcentering for maintaining proper alignment of the reaming tool and its holder.

This and other objects will be seen from the following specification and claims in conjunction with the appended drawings, in which: a

' FIG. 1 is an end elevational view of the reamer holder.-

FIG. 2 is a section taken on line 2-2 of FIG. 1.

FIG. 3 is a section taken on line 33 of FIG. 2.

FIG. 4 isa fragmentary side elevational view of the mounting shank.

'FIG. 5 is a section taken on line 5-5 of FIG. 4.

FIG. 6 is a side elevational view of the float.

FIG. 7 is a left end elevational view thereof.

FIG. 8 is a right end elevational view thereof.

FIG. 9 is a fragmentary side elevational view of a different form of shank.

- FIG. 10 is an end elevational view taken on line 10l0 of FIG. 9.

' FIG. 11 is a fragmentary'side elevational view taken on line 11-11 of FIG. 1.0. J 1 I FIG. 12'is a side elevational view of a different form FIG. 13 is a' right end 'elevational viewtaken on line 13-13 of FIG. 12. FIG. 14 is a left end elevational view taken on line FIG. 15 is a side elevational view taken on line 15-15 of FIG. 14.

It will be understood that the above drawings illustrate merely a preferred embodiment of the invention, and that other embodiments are contemplated within the scope of the claims hereafter set forth.

Referring to FIGS. 1-8 and particularly FIG. 2, the

present floating reamer holder includes mounting sleeve 11 with inwardly directed annular flange 12 at one end having a tapered surface 13 and with a central aperture 14 through which loosely projects reamer mounting sleeve 17. Said sleeve has an enlarged head 18 at one end positioned within sleeve 11 and having a complemental tapered forward surface 19 cooperable with tapered'surface 13 on sleeve 11. Sleeve 17 has a central bore 20 within which is snugly and slidably received the shank of a suitable reamer T, fragmentarily shown in dotted lines.

Mounting sleeve 11 at its opposite end has an internal thread 15, and intermediate its ends the annular recess 16. Reamer T is immovably secured within sleeve 17 by one or more set screws 21. The head 18 of sleeve 17 has a bore communicating with bore 20 but of less diameter. The end face 26 of the head 18 has formed therein intermediate 7 its bore and its outer diameter, a pair of transverse aligned opposed slots 22 of rectangular cross-section adapted to cooperatively and interlockingly receive a corresponding pair of flanges 23, which project from one side of the cylindrical float 24. Said float is of less outside diameter than the internal diameter of mounting sleeve 11 and is therefore spaced from the interior surface thereof.

Opposed aligned ribs of the form shown in FIG. 3, are formed in one end face of float 24 and are arranged at right angles to the opposed pair of flanges 23, which are substantially rectangular in cross-section. Ribs 25 cooperatively engage the end face 26 of the reamer holder sleeve 17, by a continuous line contact, for minimum friction and therebyspace the outer ends of the flanges 23 from the bottom of the receiving slots 22 formed in the head 18 of sleeve 17. With the sleeve 17 assembled within the mounting sleeve 11, as shown in FIGS. 2 and 3, the float is then introduced after which the shank is threaded into place in the manner hereafter described. Projecting from the opposite end face of float 24, are a pair of flanges 27 opposed from each other and in alignment, being substantially rectangular in cross-section. Said flanges 27 are arranged at right angles to the plane of the other float flanges 23 and project oppositely therefrom, as illustrated in FIGS. 3 and 6. p

The mounting shank 30, which is adapted to be secured within a movable portion of the machine tool, such as a reamer, fragmentarily indicated at H, has an enlarged cylindrical head 29. In inner end face 31 thereof are formed a pair of opposed aligned transverse slots 28 which 00- i I operatively receive flo'at flanges 27. Said slots 28 havea substantially rectangular shape. The end face 31 of the shank-head 29 also has a pair of aligned opposed elongated ridges 32 of arcuate shape as indicated in FIG. 4, which are arranged at right angles to the slots 28. By this construction, there is also straight line contact between float 24 and the end face 31 of the shank head 29. The shank 30 has elongated central bore 33 terminating in the countersunk fitting receiving opening 34', whereby a-lubricant may be supplied to reamer holder.

The shank head 29 has an exterior thread 35 which cooperatively engages the internal threadsJlS of the mount ing sleeve 11 and upon proper threaded adjustment within. said sleeve is secured in position by the lock-nut 35.to.

complete the assembly. The present float 24 by its arrangement of oppositely projecting

flanges

27 and 23 provides a loose but effective connection between shank 30 and the tool holder sleeve 17 for transmitting motion thereof, but at the same time the tapered surface 19 of the sleeve head 18 cooperates with the corresponding tapered surface 13 on the mounting sleeve flange 12' and automatically reali-gns itself. This is possible by virtue of the floating arrangement of the connecting float 24 which engages the respective shank 30 by the line contacts 32, and engages the sleeve head 18 by the line contacts 25 to thereby minimize friction therebetween. Thus, there is provided a self-centering re-aligning floating reamer holder.

Modification FIGS. 9-15 illustrate a modification.

Referring to FIGS. 9, 10 and I], a different form of shank 37 is shown which includes the enlarged cylindrical head 38 and which has an outer end face 39 tapered at 40, as indicated in FIG. 9. Tapered portions 40 define the central transverse contact line 40'. Said end face upon opposite sides of the bore 37 has apair of opposed aligned transverse slots 41 adapted to cooperatively receive the opposed aligned flanges 42 of float 44.

Said flanges project from end face 43 of said float and cooperatively nest within slots 41. In view of the taper 40 on end face 39. it is apparent that there will merely be a straight line contact 40 between end face 39 and the end face 43 of float 44. The height of the flanges 42is such that said flanges will not extend to the base of the slots 22 formed within the end face 26 of sleeve 17, in the manner illustrated in FIG. 2. It will be noted that here the interior of the present floating be had to the following claims:

1. A floating reamer holder comprising a mounting sleeve having an inwardly directed annular flange;

' a tool mounting sleeve with an enlarged annular head 'loosely positioned within said-first sleeve and cooperatively bearing against said flange, said' head havingatransverse'slotinits end face;

a mounting shank threaded and secured within said first sleeve;

3 and having a transverse slot in its inner end face, and

. aicylindrical float loosely positioned within said first sleeve between said head and shank and having formed in its outer faces outwardly directed flanges loosely nested within said slots.

2. In the reamer holder of claim 1, the interior surface of said flangebeing tapered, and the corresponding leading end of said head being similarly tapered.

3. In the reamer holder of claim 1, the interior surface of said flange being forwardly and inwardly tapered, and

the corresponding leading end of said head being similarly tapered. Y

4. In the reamer holder or claim 1, there being a pair of aligned opposed transverse slots in said head end face, and there'being a pair of aligned opposed transverse slots in the shank inner end face,- sai'd float having formed in its outer faces a pair of said outwardly directed flanges loosely nested within said slots.

. 5. In the reamer holder of claim 4, said pairs of slotsv .and said float flanges respectively lying in planes at right angles to each other.

6. In the reamer holder ofclaim 1, one end face of said I float having an elongated ridge extending thereacross, and

arranged at right angles to the plane of the corresponding flanges in said end face for cooperative engagement with the end face of said head, said shank having formed in its end face an outwardly projecting ridge, and arranged at right angles to the plane of the corresponding slots in said shank for cooperative registry with the other end face of said float.

7. In the reamerholder of claim 6, said float ridge being arcuate in cross-section, and said shank ridge being arcuate in cross-section. v

8. In the reamer holder of claim 6, said pairs of $10 and said float flanges respectively lying in planes at right angles to each other.

9. The reamer holder of claim 6, and a lock'nut on said shank cooperable with said mounting sleeve for securing said float and shank in adjusted position.

10. In the reamer holder of claim 1, one end face of said float having a pair of converging tapered surfaces defining a transverse contact edge at right angles to the plane of the corresponding flanges in said float to provide a straight line contactwith the corresponding end face of said 'head, said shank having a pair of inwardly converging surfaces defining a contact line at right angles to the plane of the slots formedin said shank providing a straight line contact with the corresponding other end face of said float.

References Cited UNITED STATES PATENTS 1,618,998 3/1927 Redinger 9e 11 1,860,762 5/1932 Wyrick 11 2,212,406 8/1940 Rusnak 77 s8 FOREIGN PATENTS 831,896 9/1938 France.

GERALD A. DOST, Primary Examiner.

Claims

1. A FLOATING REAMER HOLDER COMPRISING A MOUNTING SLEEVE HAVING AN INWARDLY ANNULAR FLANGE; A TOOL MOUNTING SLEEVE WITH AN ENLARGED ANNULAR HEAD LOOSELY POSITIONED WITHIN SAID FIRST SLEEVE AND COOPERATIVELY BEARING AGAINST SAID FLANGE, SAID HEAD HAVING A TRANSVERSE SLOT IN ITS END FACE; A MOUNTING SHANK THREADED AND SECURED WITHIN SAID FIRST SLEEVE; AND HAVING A TRANSVERSE SLOT IN ITS INNER END FACE, AND A CYLINDRICAL FLOAT LOOSELY POSITIONED WITHIN SAID FIRST SLEEVE BETWEEN SAID HEAD AND SHANK AND HAVING FORMED IN ITS OUTER FACES OUTWARDLY DIRECTED FLANGES LOOSELY NESTED WITHIN SAID SLOTS.