US2607252A - Portable power driven nut setter - Google Patents

Description

Aug. 19, 1952 E. H. sHAFF PORTABLE POWER-DRIVEN NUT SETTER 'f Filed Oct. 14, 1948 I NvBgo-row-g Yne't Shak. da pg A-r-rourv/J Patented Aug. 19, 1952 PORTABLEBOWER DRIYENYJNUT Srl'iTElt ErnestrH; Shaft, kSpring Lake, Mich., assi'gnor toi Keller"IfooLGompanypGrand Haven, Mich., a cor-porationoMichigan Application vQctoher 14, 1948', SerialNo. 54,456'

Al further objectr isto provide. in. a: port-able power. driven nut runneranut magazinefor re,- Qeiving andretaining astack of. nuts,A together with means ofv asimple. and practical character forV supporting and driving themagazine in thev applicationof the nuts one by one to thework.

Another object, is to provide a novel and efe, f ectual means for insuring delivery of the nuts onerby one from, the magazine.

Other objects andadvantages of the invention will become apparent fromv the. following detailed description .taken in conjunction with the accompanying drawings in which:

`Figure 1' is avertical section through a nut setter constructed in accordance with the present invention.

Fig. 2 is a fragmentary section on an enlarged scale through the forward end. portion of the nut setter illustrated in Fig. 1;

Fig. 3 isa transverse'section taken-1 substantially in the planeofr line 3-3 inv Fig. l.

Fig'. 4 is a fragmentary section-similar to Fig: 2 but illustrating the application of anut tov a threaded element. v

Fig. 5' is a transverse section takensubstanstially in the plane of 'lineY5L-5f irl-Fig. 4.- 'Y

While the invention is susceptb'le.- of variou modifications-and alternative constructions, there is shown inthe drawings, and will herein be. der. scribed in detail the preferred embodiment,v but.. it; to be, understood thatL itl is not intended thereby to limit the invention tothe form disclosed, but it is intended to cover all modiiicaform of the invention-is shown embodied in` a portable pressure fiuidaetuatedl tool comprising an elongated generally cylindrical main housing rotor I4 eccentricallydisposed within the sleeve II. The rotorV I4 is mounted on the shaftA I0 which extends axially therethrough. TheY endsV of the shaft I0 project through the end plates I2l and I3 and are supported in bearings I5 and I6.

Adjacent the'rear end of the tool is disposed a valve mechanism I8 for control of the admission of pressure fluid to actuate the tool. l Pressure fluid is supplied to the tool from `any Suitable source- (not shown) by way of an axial supplyv passage I9 and a fitting-20 received in theA outer end thereof. The valve I8 is disposed in a bore 2l in a valve block 22. It includes a` sleeve 24 closely fitted in the bore 2 Iv and a plunger v2` shiftabl'e axially Within the sleeve. Upon openingv the Valve 2I pressure fluidVV is admitted to driveA the rotor I4y by way of suitable ports (not shown) in the valve block 22 and theend'plate I3.

The valve I8, as shown, is operated by means of a spring lever 26 conveniently disposed along the underside of the housing Bfor actuation-by. therngersof an operator using the tool. The lever 2li-is secured at its forward end to the housing 8.as by a screw 28'. Adjacent. the rear end of the lever 26 is xed a pin 29 which engages the outer end of the valve plunger 25. Thelatter and Ythe sleeve 24 .extend outwardly from the valver block. 22 through anv opening.r 3i)A in. the housing 8.

'I'.o permitv ready alinementy of thev bore 2l' in` the valve blockl 22 and the housing opening 30 whenthe tool is assembled and thus facilitate its manufacture, the valve'block22 is* fashioned to be slipped" axially into the housing 8, nov rotation Vthereof beingr required. The valve block is clamped in proper position within the housingv againstthe end plate I3 by an end capSI which is screw threaded into the outer end of: the housing 8l and which bears against the-b1oc1 :.22.

Spent pressure iiuid is exhausted from the motor casing through..exhaust ports 3-2 in the sleeve II, into a generally annularl space 34 partially surrounding the sleevev II and thence. through the end plate I2 by way of ports 35, and annular channel 36 and ports 38.

In accordance with my invention, the tool is provided at one end with a head, generally designated 40, in-which is mounted a, combined nut containing and driving mechanism whereby a v, stack of nuts is supported forV feeding movement 8 having a rotary pneumaticmotorl thereinfor driving a shaft I0. As shown, the.` motor 910cm..-

ina direction transversely` of the axis of thedrivc motor. The mechanism includesV av magazine, generally vdesignated 4I, mounted for'axial as Welllas rotationaljmovements andprov'iding an elongated chamber of polygonal cross section for receiving the nuts, the magazine being driven 3 c from the motor through the medium of an impact or kick-out clutch, engaged and disengaged as permitted by axial movements of the magazine.

In the present instance, the head 40 is formed in major part by an extension 42 of the tool housing 8 and by a cap 43 screw-threaded into the lower open end of the extension 42. Journaled inthe head is a sleeve 44 constituting a hollow drive shaft and having rigid therewith a bevel gear45 meshing with a bevel pinion 45a, on the motor shaft l0. The hollow drive shaft 44 is thus disposed at an angle to the axis of the motor shaft l being herein approximately '70 degrees with respect to such shaft.

The magazine 4I is, in the instant embodiment, formed in part by a second hollow shaft i 66 tting snugly into the drive shaft 44 for rotational and axial movements therein. This inner hollow shaft is of substantially greater length than the outer shaft or sleeve so that its opposite ends project substantially beyond the ends of the sleeve, and at` its lower end has a nut driving socket 6I threaded thereon.

The shaft 66 lis arranged to be driven from the drive shaft 44 through the medium'of a kickoutclutch 56, presently to be described, and to adapt the shaft to the reception of a stack of nuts it is provided with an inner vliner in the form of an elongated tubular member 64 having a bore of polygonal cross section, herein shown as hexagonal. The tubular member 64 is loosely received within the driven shaft 66 but is held against rotational movement relative thereto through the medium of the socketimember 6|.

:To this end, the liner member has a projection 65 formed on its lower end which is adapted to be received within a recess 66 in the socket 6l. The latter has a bore of Vpolygonal cross section alined with `the polygonal bore of the tubular member, the projection; and recessrbeing so arranged as to maintain the two hexagonal bores in the socket member and liner member in proper angular relation to insure the passage of the nuts fromthe liner member into the socket member. i

The magazine thus comprised of the hollow driven shaft 66, the tubular liner memberk 64 and the socket member 6l is completed by a cap 67 having a lower open end fitting slidably over the upper Vend of the shaft 60 and disengageably connected thereto by any suitable means as by a bayonet type connection 68. The cap is adapted' to receive a coiled compression spring 10 bearing at one end against the outer closed end of the cap and at its other end against the on' a bolt or the like, the clutch elements 56al and 56h are provided with interengagingteeth having sloping side faces t'o'permit the teethl of the driving clutch element 56a to slide over and then re-enga'ge those of .the driven clutch element 56D thus creating a hammering action for application to themnut. The clutch elements 56a and 56D are urgedinto engagement by force applied by the .operatorjin pressing the tool socket 6l.

4 against the work, the inner hollow shaft 60 on which the driven element 56h is mounted having a loose running iit within the hollow driving shaft 44 thus permitting the necessary axial movement. Outward movement of the shaft 60 together with the clutch element 56o and the socket 6I is limited by engagement of the outer face of the clutch element 56h with the inner face of the housing cap 43. v

Means is provided to hold back the nuts in the bore of the tube 64 to prevent them from being forced outwardly therefrom by the action of the spring Nl except when applied to a threaded element. In the presenti instance, a catch element 7 5 `is provided for this purpose on the socket 6I. The catch element 'I5 is in the form of a dog pivotally mounted intermediate its ends on a spring 'i6 disposed about the lower end of the socket 6l and received in an axially extending slot 'I8 provided therefor in the socket. The spring 'I6 is in the form of a split ring and is received in ya peripheral groove 76 disposed about the socket 6i.

Since the threaded end ofV a bolt or the like projecting from a workpiece is generally longer than the thickness of the nut to be'applied there-` to, the next following nut must be prevented from `being threadedk onto the bolt along with the rst nut. This isaccomplished in the present instance, by locating the projection 75a of the catch l a short Vdistance from the end of the socket member. short enough so that the nut can be reached by the bolt B. When the first nut has been applied to the bolt, screw threading of the nut thereonY ment ofthe upper portion of the catch element l with the next adjacent nut. This causes the spring 'i6 to beforced outwardly resulting in application of pressure to the second nut by the upper portion of the catch element so that it is held back and prevented from following the rst nut downwardly throughr the bore in the andthe tool removed, the spring i6 and the catch element l5 move back to normal position thus letting the nuts down so that the next one can be applied to thenext threaded element.

Y In the use of thetool, a stack of nuts is placed within the magazine with the lowerinost nut in engagement with` the nose of the dog 'l5 and therefore disposed a short distance from the end of the socket member. 6l. The cap 6l' is then applied s-o that the spring 'IG exerts a downward pressure on the stack of nuts.

In the application of a nut to a bolt or the like, the operator exertsfdownward -pressureon the tool, causing the driven shaft 66 to move upwardlyto carry the lower clutch block 56h into engagement with the upper clutch block 56a. on the drive shaft 44. The motor is then set inV operation by .Howeven such distance is j After, Vthe rstnut has been applied gaged and then immediately re-eng-aged to drive the nut home with a series of blows.

It will be seen that the tool may be easily adapted for use with nuts of various sizes and shapes by replacing the liner tube 64 and socket member 6| of the magazine with similar parts of appropriate shapes and dimensions.

I claim as my invention:

1. In a portable power driven nut setter, the combination of a hollow tool head. a tubular drive shaft journaled in said tool head and held against axial movement therein, an elongated magazine for receiving a plurality of nuts in axially stacked relation, said magazine being disposed within said tubular drive shaft with one end terminating ina nut driving socket, said tool head having upper and lower alined openings therein with the socket rality of nuts in axially stacked relation and terminating at one end in a nut driving socket having a longitudinal slot therein intersecting its bore, and a retainer for holding the nuts in lsaid magazine and operative to release the nuts one at a time therefrom, said retainer including a dog and a spring supported on said socket and yieldably and pivotally mounting said dog intermediate its ends in said socket slot with the inner edge of said dog substantially flush with the wall of the socket bore, said dog having an inwardly projecting nose portion adjacent the outer end thereof normally disposed for engagement with the lowermost nut in said magazine, the nose portion of said dog being shaped so that upon forceful withdrawal of the lowermost nut from the magazine the lower portion of the dog will be cammed outwardly against the action of said spring and the upper end portion of said dog will be simultaneously moved into frictional engagement with the succeeding nut in the magazine to retain the same therein.

ERNEST H. SHAFF.

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

UNITED STATES PATENTS Number Name Date 2,179,724 Kuehne Nov. 14, 1939 2,256,012 Blair Sept. 16, 1941 2,322,024 Hutchison June 15, 1943 2,412,275 Klopovic Dec. 10, 1946 2,420,741 Eriksson May 20, 1947 2,506,835 Johnson May 9, 1950 FOREIGN PATENTS Number Country Date 445,142 Germany June 4, 1927

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