US2384399A - Wrench - Google Patents

Description

Sept 4, 1945. H. c. REYNOLDS WRENCH INV ENTQR Harold (119 0 HIS ATTORNEY.

Patented Sept. 4, 1945 WRENCH Harold C. Reynolds, Athens, Pa., mignor to ingersoll-Rand Company, New York, N. Y., a cor poration of New Jersey Application August 31,: 1944, Serial No. 552,025

-' 2 Claims. (Cl. 192-450) This invention relates to wrenches, and particularly to wrenches driven by fluid actuated motors.

One object of the invention is to provide a construction for a wrench which will develop torque limited to a predetermined maximum value.

Another object of the invention is to provide an adjustment by which the maximum torque of a motor driven wrench may be varied as desired.

Another object of the invention is to provide a relatively simple and inexpensive construction for amotor driven wrench which is adapted to automatically stop the motor when a predetermined torque is reached.

Other objects of the invention will be in part obvious and in partpointed out hereinafter.

In the drawing in which similar reference characters refer to'similar parts, I v

Fig. 1 is a side view of a wrench constructed in accordance with the practice of the invention,

Fig.2 is a cross sectional view of the front end of the tool taken along the line 2-2 of Fig. 1

looking in the direction of the arrows,

indicate more clearly the connection with "a suitable supply of motive fluid (not shown) a nipple i9 and a shutoff valve 24 are shown coupled to the backhead H1 at the port ll. v

The rotor of the motor is provided with a shaft 2i extending into the'gearing box II and is adapted to'drive through suitable planetary gearing 22 a shaft 23. Within the shaft housing I2 is disposed a longitudinally-extending shaft 24 journalled on an antifriction bearing 25in a bore 24 of the housing l2 and on a second antifriction bearing 2'! provided adjacent the outer end of the shaft 24 and slidably-inounted in a bore 24 in the casing l2.

Shaft 24 is adapted to slide with its bearings-in the bores 28 and 28 but'is opposed in such motion by the compressive force of a spring 29 arranged Fig. 3 is a horizontal longitudinal section of the forward end of the tooltaken along the line 3-3 of Fig. 1 looking in the direction of the arrows.

Fig. 4 is a cross section through the spring compressing adjustment taken at the line 4-4 of Fig. 3,

Fig. 5 is a cross sectional view through the throttle valve and casing of the, tool taken along y the line 5-5 of Fig. 1 looking in the direction of.

the arrows,

Fig. 6 is a detail view of the stem of the throttle valve and its operating mechanism taken along the line 86 of Fig. 5-looking in the direction of the arrows, portions of the casing being shown in section, and I Fig. 7 is a cross sectional view through the motor and the throttle valve actuating means taken along the line 1-1 of Fig. 1 looking in the direction of the arrows.

Fig. l is an external view of the wrench with portions of the interior mechanism shown in broken lines and shows the working parts of the tool to be inclosed in a casing comprising a motor housing iii, a gear casing H, and a casing l2 for the shaft to be described hereinafter. Motive power for the tool is provided by vane-type motor having a rotor 14 provided with theconventional vanes l 5. For controlling the flow of motive fluid to the motor there is provided a throttle valve l6 housed in the backhead ll! of the motor which controls the flow of motive fluid from an inlet port I! to a supply port l8 leading to the motor. To

about the shaft 24 and having a' forward abutment It shaped somewhat like a cup and bearing against the race of the bearing 25. The rear'end of the spring '29 is disposed within a rearward abutment 3i slidable in the bore 26 of the housing l2.

The shaft 24 is adapted tobe driven by shaft 22 and to this end a coupling member 22 is provided which is screwed into the end of the shaft'23 as.

shown at 33 and is provided with a bore 34 to receive the end of shaft 24. Relative rotation between the two shafts is prevented by ball 34 lying in a groove 34 in the shaft and a complementary groove 21 provided in the bore 34 of the coupling member 32. Ball 35 is adapted to permit relative longitudinal movement of the coupling member 32 and the shaft 24.

Compression of the spring 29 is adjustable by means for varying the position of the abutment II and to this end there are provided a plurality of pins 38 (Fig. 4) extending into bores 39 of the abutment 3| and through the wall of the casing I 2 at suitable longitudinal slots 40 to engage a threaded ring 4| encircling the casing i2. Longitudinal motion of the ring 4| is accomplished by a nut 42 threaded to receive the. ring 4| and having a rearward face 43 abutting a coupling 44 forming part of casing l2 and threaded into it as shown at 45. Coupling 44 provides a means of threadingly attaching the casing l2 to the gear housing ll.

Shaft 24 is adapted to drive the socket receiving spindle 48 through sortable worm gearing comprising the worm 49, formed integrally with the shaft 24, and the worm wheel I50 fitting the spindle 48 at a hexagonal portion 5!. Spindle 48 is suitably housed within an offset portion 52 of the casing l2 having a cap 53 supporting a miemve'u-thereuw mvided wmechanism adaptedutorbeaactuated :both manually and zautomaticaliyr through? :tudinal motion :ottheshaitill. mechanism comprises e a; lhait-ll' extetiori;to 'the': tool-teasing and-substantially 'paz'alielatozithe axistoi' r the tool 7 having a bearing in afbracket'fltat' thei'forwaxd EThe-value Zotflthetorque: required to overcome end of the casing t2 :and *m az-band i-lr suitably ciamped to thy meanszoiacontractingsbolt l8. a' sha'itiutis providedwithran armll'normally crntactingthe end otthewalve H a I! which it isadaptemto biaal'ltr'respon'ding movementioi theabutmentiil. i Snit- 'lever l2 for turning the shaitz and-ioperatingthe throttle valve 10, .Shait ill a viaz movahle z iou'giethesmotor.

' Upona stoppage: oh the: motonjaa delcrtbed and rremowairoizthewrenehairontheinutili apelng 5 $120 restoresv the bracket'll' to ita'normal' leeward @position. zin zlemn having been M the v'zbiasingzspringfl miahes'shaft'nlliomtdzto ib'ring ztheearm llx to "register 'ifll'ifllQL-IMFO 'z-valve I toneubsequent :operation.

*zthe:compression or the spring is determined =iandissadjustab1e by means. of xthe nut 41 which or retracts the ring-4 has desired and aoompresses thelspring' 2O accordingly by th coradjustment of theznut Tux-may be \had thy apflyingxato'rque wrench of a ien-known a typeutow the spindl andapplyingthedaind tudinally against thepressui'eoLa-biaaingrmmg i-toequewto: it iyhile adjustment of thenut ll is disengage the endaoi i t-hez. flardttlguyflyg 7 1.2991- :mitting it to close.

when moved :to" thefrear-so' asto wse' the throttle 'valve theiapringfill is the lever i2 totitsrinormaloutwatdly-vextending 25 *meanscf a screwillipassing through lthe l'casing I and =whenrm'oved re'arwardly: 'iszzadapted xto E20 ifflmspby the above described construction are accomplished; objects hereinbeiore u referrre'd to.

3. LA 'wrenchincluding a casing, a motornwlthini the caaing'g a shaft insaid casing adapted to Athens-drivenlay saidmot0rv and to be moved &1!- mt saidr motor '.:by the torque thereof, :a throttle waive v for the .motor," operative connec- I 2 at the' slot' there :being a sleeve' lbearing i1 @380 "tions': betwee'ni said :ahai't 'ands said -'va.lve to :re-

.provided on the-:screw 'l ll-i-toengage the avails oi 'the slot It.

' vided on the spindle-' to' 'engage aia'sifltahie nut In"operation, the motor :within' 'thecica'aing is actuated by 'depressingthei leverilt iwhich' by g means of the arm'lw'depresses' the throttle-waive e I 0' Qdmittingrmotiveiiuid': through ithe'supplmport it to l the motor. .The torque: of theF-motor is 40 for said-ring- -:abutting the casing.

transmitted through 1 the shaft ll :raand -:;gearing 22 x and shaft 23 tothe ashaft il and thence through the :wormxgears 1 ll z-and; ll tozthe spindie Resistance "offi'the .nut' I i tot-rotation. otithe x spindle causes 'endfithrusti'iri'i'thexahafttflt in 5 the amotor, 1 inanually operable "tor said I the direction 'towardthe= right,:=asshown :in the t t figures. This end #thrustaistransmittedtthrough flange I!v to thevbearing'ill and the tomardwabutmenttltendingto compressrthet'springl li. --As the end thrust becomes:greaterathescompressive 450 'Iwisermovement .and means to adiustnthevcomforce of the spring" 29 isovercome,= lmshing' the abutment 30 rearwardly andthroughithemracket II also pushing theshaftltrearwandly. f-Atsa. predetermined torque of the shaft 14' thew-degree :leasethevvalve iuponeisaidaendwise movement, a

nadiustthexcompreesion or said spring including I Ho tightening or Jooseningas 'the:-case may::=be.' 85 r aniabntmentfimember within" the-:casing, :mem-

members,.- andxan vadjusting-nut :exteriorly of the 2 2.fA=wreii ch'including acasing, a'motor'withsin the casing, a zshattc/insaidwcasing adapted to t':be driven by saidv motor and to be moved endwises-byatheitorque:thereoi, a throttl valve for valve,"-'operative' connectinns:'=between aaid ahalt xandsaidwmanuallyoperated means toutdiaengage :said vaiveiuponsaid endwise'movement, I'lfl'llll flabout said 1 shaft and adapted to resist said endepression: of: said spring including an abutment "member-within the casing, members extending z'through the casing tor-engage thenabutment and :tor-prevent'rrotation thereof, a threaded rinrenoi longitudinal motion of th -shaft visisuch as 'I55tagagingthe outer ends otsaid members, 'andian to cause the bracketill to'rpush-the-shait' lt and its arm 60 sui'iiciently far. bacle tofdisengagethe throttle valve [8 whereupon'the. valve rcloaesa'un- ,;ad-iusting::nut for saidrring rotatableon th -eb' 'i'teriorioi andabutting thercasing.

HAROLD C. REYNOLDS.

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