US2626812A - Toolholder - Google Patents

Description

Patented Jan. 27, 1953 UNITED STATES PATENT OFFICE "EGOLHOLDER Willis H. Jones, Kenmore, N. Y. Application March 17, 1950, Serial No. 150,264

.3 Claims.

a combination rigid andfloating holder of this character which is simple, compact and inexpensive in construction, which is self-contained for dual types of machine work and which can be quickly adjusted to accommodate a given tool operation, thereby affording a material saving in time and labor in the operation of the machines.

Other ieatures of the invention reside in the construction and arrangement of parts hereinafter described and particularly pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is a sectional elevation of the combination tool holder embodying my invention, showing the same in a rigid tool retaining position. Figure 2 is a fragmentary vertical sectional view, taken on line 22, Figure 1. Figure 3 is a cross section taken on line 33, Figure 1. Figure 4 is a fragmentary sectional View, similar to Figure 1, showing the holder in its floating tool holding position. Figure 5 is an exploded perspective view of the tool holder.

Similar characters of reference indicate corresponding parts throughout the several views.

In the preferred embodiment of my invention shown in the drawings, it consists of a driving stem or shank which is adapted to be inserted and secured to the driving spindle ll of the machine and an opposing driven stem or shank l2 to which a drill, reamer or like cutting tool it? is adapted to be secured by a suitable chuck Hi. The driving and driven shanks are adapted to be connected or coupled in such a manner that the tool can be rigidly secured in axial alinement with such shanks or the tool so supported as to have a limited floating or universal movement relative to such axis, to thereby provide a combination holder for quickly adapting it to one type of work or another.

For this purpose, the driving shank l0 terminates at its lower or outer end in a hollow or recessed cylindrical head portion having external screw threads l6 thereon and having a transverse groove IT in the recessed bottom face thereof in intersecting relation to its axis. The

driven shank l2 terminates at its upper or inner end in an enlarged circular head i8 providing an external inclined or angular bearing face or shoulder 19 and having a transverse, diametricallyextending groove 2i! in the upper face thereof, such groove being complementary to and opposing the groove 41 in the head portion l5 of the driving shank. A floating coupling member 2|, in substantially the form of a disk, is disposed between the heads .l5 and H! of the driving and driven shanks and has lugs 22 on its opposing faces and at right angles to each other for transversesliding and clutching engagement with the companion head grooves I? and 26, respectively. Axially thereof the coupling memoer has an opening 23 therein. The parts H3, l2 and 2! are retained in their proper assembled relation by an adjustable sleeve-nut or barrel 24 which engages the threaded portion it of the head 15 in the manner shown in Figures 1, 2 and 4. This nut has an internal tapered or curved seat or shoulder 25 which is adapted to abut against the companion inclined external shoulder l9 on the head [8 to firmly retain and line up the parts in rigid coaxial relation for drilling and like operations, such position being shown in Figures 1 and 2. The internal diameter of the nut-bore is somewhat greater than the external diameter of the head !8 for a purpose which will presently appear.

To permit a floating action of the tool from the holder during reaming and like operations, the sleeve-nut 24 is loosened sufliciently to back its shoulder away from that of the driven shankhead [8. The coupling connection 2!, under this condition, enables the driven shank i2 to have a limited lateral or angular displacement and floating action relative to the driving shank iii. For the purpose of fioatingly-supporting the driven shank and limiting its angular displacement, I provide the driven shank with an axially disposed pin or spindle 26 pending therefrom, viewing Figure 1, which is fixed at one end thereto while its other end extends freely through the opening 23 in the coupling member 2! and freely into a bore 2'! formed axially in the driven shank 12. This pin is capable of flexing and at its free end has a head 28 thereon which bears against the bore-walls and forms a bearing fulcrum about Which the driven member is free to float in a limited angular fashion. Figure 4 shows the sleeve-nut adjusted for providing a floating support for the driven tool-bearing shank, the same being shown by Way of example in a horizontal position for performing a reaming operation.

While manifestly simple, compact and inexpensive in construction, this combination selfcontained holder is eflicient in operation and easy to manipulate, and it can be set in a minimum period of time to accommodate a rigid or floating tool operation and it eliminates the necessity of changing tool holders for different types of work.

I claim as my invention:

1. A combination tool holder, comprising opposing driving and driven members, a floating drive coupling operatively disposed between and for permitting a relative lateral displacement of said members, an outer sleeve-like coupling for connecting said members and said floating coupling into a unitary rigidly-alined assembly, and a flexible spindle-like element fixed to and pending axially from the driving member for lateral ilexure relative thereto and extending axially and freely through said floating coupling member and into relative axial sliding and fulcruming bearing contact at its free end with said driven member.

2. A combination tool holder, comprising opposing driving and driven members, a floating coupling member disposed in rotative driving engagement between the opposing ends of said members, the driving member including an externally-threaded head and the driven member including a head having an external inclined shoulder thereon, a sleeve-nut engageable with said threaded head and having an internal inclined shoulder for engagement with the companion shoulder on the head of said driven member for connecting said several members into a unitary rigidly-alined assembly, and means constituting a floating and alining support for the driven member fixed to and extending axially from said driving member for lateral fiexure relative thereto and to said coupling member and having a relative axial sliding and fulcruming connection with said driven member.

member having an axial bore therein and said coupling member having an alined opening therein, and a flexible pin fixed at one end to the driving member for lateral fiexure relative thereto and extending axially therefrom and freely through the coupling member opening and freely into the driven member-bore and terminating at its free end in a head in relative axial sliding relation to and in bearing fulcruming contact with said bore.

WILLIS H. JONES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,027,520 Blood May 26, 1912 1,377,663 Brown et al May 10, 1921 1,854,632 Skeel Apr. 19, 1932 2,017,332 Zempel Oct. 15, 1935 2,335,170 Cerisano Nov. 23, 1943 2,475,386 Frisco July 5, 1949 FOREIGN PATENTS Number Country Date 25,321 Great Britain Dec. 11, 1901

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