US2032196A

US2032196A - Rod or tool connecter

Info

Publication number: US2032196A
Application number: US710955A
Authority: US
Inventors: Joseph H Blake
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-02-12
Filing date: 1934-02-12
Publication date: 1936-02-25
Anticipated expiration: 1953-02-25

Description

Patented Feb. 25, 1936 UNITED STATES PATENT OFFICE 2 Claims.

My present invention relates to the art of coupling devices and more particularly to a rod or tool connecter.

There are many conditions of use where it is desirable to couple together shafts, pipes or tool bits in a manner which will permit taking the full compression load, by abutting the two elements joined together, in such a manner that the shock of hammering and compression strain will not fall upon the coupling mechanism. This is true of control rods and the like and most particularly in the case of percussion tools. It is for this latter purpose that my invention has been conceived and developed altho it is believed it will be clearly understood that there will be many other uses which will suggest themselves to those skilled in this art.

In percussion tools it is very desirable to have drill bits which are easily interchangeable yet which will absorb the full blow of the percussion tool. 'Ihis can only be accomplished by having an extension of the plunger element of the percussion tool engage in end to end contact the tool bit itself. My device is particularly intended to serve this purpose and by virtue of the fact there is no screw connections, no threads to become battered and in fact no load placed upon the coupling device itself, it can be depended upon to last for long periods under the most unusual conditions.

Other and more specific objects will be apparent from the following description taken in connection with the accompanying drawing, wherein Figure 1 is an elevation showing my device as used in holding a tool bit to the plunger of a percussion tool. Figure 2 is a longitudinal sectional View taken thru the device of Figure l, the cutting plane being revolved degrees from Figure 1. Figure 3 is a view similar to Figure 1 showing certain parts of my device in section to better illustrate the construction. Figure 4 is a View similar to Figure 3 excepting the coupling device is shown in its released position where the tool is free for removal. Figure 5 is a cross sectional view taken along the line 5-5 of Figure 4. Figure 6 is a cross sectional view taken along the line 6 6 of Figure 3.

Referring to the drawing, throughout which like reference characters indicate like parts, 8 designates the base sleeve of my coupler. This should be fixedly secured in some convenient manner to the tool plunger or striker element I0. For sake of clarity in my present drawing I have shown this sleeve being secured to piston IIJ by the thru rivet I2. In actual practice. probably,

it would be most desirable to thread it onto plunger I6 or possibly weld or braise it to the same. Sleeve 8 as will best be seen from Figures 3 and 4 is provided with a slot throughout its lower extent as I4. The lower end of this slot is of limited width, just sufncient to pass a lug I6 which should be xedly secured to member I8 which might be a tool bit or one element of a control rod. Slot I4 has 4a portion of increased width at 26 which is adapted to house the wedge lug 22. Slot I4 is further enlarged at its upper end and on the opposite side from enlargement 20 as at 24 in an amount suiicient to nearly house lug I6. This enlargement should not however be the full thickness of lug I6 otherwise the wedging action of wedge block 22 will be lost. It should further be provided with a flat side 26 of suflcient length so that lug I6 will have a bearing surface, parallel to its axis of movement, of a greater extent than its possible movement.

Encircling base sleeve 8 is the wedge lug sleeve 28. This sleeve lits suiiiciently loose on sleeve 8 so that it may slide thereon being restrained in its movements only by the inwardly extending lug 22 which in the present illustrations I have shown as being riveted to sleeve 28. In actual construction any suitable means of securing this lug might be employed. Lug 22 is wedge shaped after the show-ing of Figures 3 and 4 and is of such a width that it can be passed thru slot I4. It is further provided with the cam surface 30 which is adapted to engage lug I6. In the drawing I have indicated lug I6 as a pin. This is suitable for most installations, however, where extreme strength and long resistance to wear is required it might be desirable to make lug I6 of considerable extent along shaft I8 so that a bearing surface would be provided which would engage cam surface 3D instead of the line of contact which now exists. Wedge lug 22 is normally held in its engaged position by the urgency of spring 32 which in turn is backed up by collar 34 secured as by threading thereto by means of set screw 36 to base sleeve 8. In constructing a coupler of this type it must be borne in mind that collar 34 must be so positioned and spring 32 so proportioned that the movement of sleeve 28 will be suiiicient to place wedge block 22 in the locked position shown in Figure 3 and in the relief position shown in Figure 4.

Method of operation In operating my device, sleeve 28 is forced downwardly against spring 32 until the position indicated in Figure 4 is reached. It is then possible to insert the shaft or tool bit I8 and to carry it upwardly until shaft I8 is in intimate contact with shaft Il) as is illustrated in Figures 2 and 3. Shaft I8 may then be revolved slightly with respect to shaft III after the showing of Figure Y3 and the slide collar 28 released or the wedge may be relied upon to revolve it. Wedge block 22 then assumes the position shown in Figure 3 and it is impossible to retract tool I8 without again slipping collar 28 downwardly. In this position it will be noted that lug IB engages the flat surface 30 so that a limited movement is provided. This makes extreme accuracy of placement of lug I6 immaterial and accommodates the tool to a certain degree of wear and when in such a position lug I6 is not required to absorb any of the percussion load. The same is! true of a compression load such as might be experienced in a control rod assembly. K Y

The foregoing description and the accompanyingV drawing are believed to clearly disclose a preferred embodiment of 'my invention but it will be understood that this disclosure is merely illustrative and that such changes in the invention may be made as are fairly Within the scope and spirit of the following claims.

I claim:

1. In a coupling for a percussion tool, the

combination with a reciprocable striker and a socket-sleeve fixed at one end to the striker, said 'Y sleeve having a slot opening at its other end and a lateral locking-recess in the closed end of the slot, of a slidable tool in the sleeve, an exterior lug on the tool seated in said recess and adapted to pass through the open end of the slot, a cam-'- sleeve slidable and partially rotatable on .the socket-sleeve, an inner cam lug rigid with the 'cam sleeve and engaging the exterior lug, and said slotted sleeve havinga release-recess to receive the cam lug to permit detachment of the tool.

2. In a tool coupling the combination with a socket-sleeve having an open-end longitudinal slot, said slot having a locking-recess in one wall at its inner end and a release-recess in it opposite wall at the rear of the locking-recess, of a detachable tool| having a locking lug to enter the locking recess, a cam-sleeve slidableon the socket-sleeve, an interior lug on the cam-sleeve adapted to seat in the release-recess, a cam edge on the interior lug for locking the rst lug in the locking-recess, an end collar on the socketsleeve, and a spring coiled about the socketsleeverand interposed between the cam-sleeve and the end coll'ar.

JOSEPH H. BLAKE.