US1304426A - Power drop-hammer - Google Patents

Description

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IIJWEII DROP HAMMER.

APPLICATION FILED I JEC. 26. 19H.

Patentedv May 20, 1919.

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w. H. WELCH. POWER DROP HAMMER.

APPLICATION FILED DEC.2E, 191?.

Patentd May-20, 1919.

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W. H'. WELCH.'

POWER DROP HAMMER.

APPLlcAmn man Dec. 2s. 19u.

1,304,426. .Patented m2o, 1919.

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W. H. WELCH. Powie naoP HAMMER.

APPLICATION FILED DEC'LZHS. ISH. 1,304,426. Patented May 20, 1919.

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PATENT OFFICE.

WILLIAM H. WELCH, 0F SALEM, OHIO.

POWER DROP-HAMMER.

Specification of Letters Patent.

' Patented May 2o, 1919.

Application led December 26, 1917. Serial No. 208,725.

T 0 all whom t may concern:

. Be it known that I, vIVILUAM H. WELCH, a citizen of the United States, residing at Salem, in the county of vColumbiana and State of Ohio, have invented certain new Aand useful Improvements in Power Drop- Hammers, of which the following is a specication.

My invention relates to improvements in power hammers, and more particularly to that class or type of power actuated hammers known as drop hammers.

The primary object of the invention is to provide a generally improved power driven hammer of this class which will be exceedingly simple in construction, cheap of manufacture, andV efficient in use.

A further object is the provision o'f improved hammer actuating and controlling mechanism for a power hammer of this class, of simple and eliicient construction, particularly adapted to meet the varying demands of actual service, and which will be under full and .complete control of the operator at all times during the operation of the hammer.

A still further object is the provision of an improved power head,together withvimproved clutch and clutch actuating and controlling mechanism, whereby in connection with suitable foot or treadle operated mechanism suitably connected therewith, the operator may readily impart any desired stroke or fall to the hammer' head from the minimum to the maximum. v

In carrying out the invention the power driven shaft is provided with a suitable clutch, together with al suitable hammer actuating winding drum and suitable foot' controlled clutch engaging and lreleasing mechanism, whereby the hammer actuating drum may be intermittently movedy in one direction for elevating the hammer and released and allowed to travel in an opposite direction for dropping the hammer, means being also provided whereby such clutch engaging and disengaging members may be brought into action at variable points in the revolution of the hammer actuating drum thereby enabling the operator to impart a. variable stroke to the hammer head, and as contradistiuguished from the ordinary power driven drop hammers where it lis necessary to predetermine the length of drop or strokedesired'for the work in hand and thereafter adjusting the hammer actuating and controlling mechanism accordingly. V

With the above mentioned and other ends in view, the invention consists in the novel construction, arrangement, and combination of parts, hereinafter described, illustrated in one of its embodiments in the accompanyin drawings, and particularly pointed out in t e appended claims.

Referring to the drawings, forming a part of this specification, Figure l, is a front view of a power hammer constructed in `accordance with my invention, the parts being in their hammer releasing position, and the hammer head being in its lowermost or released position. v l

Fig. 2, a side elevation of the same.

Fig. 3, an enlarged vertical central vsectional view of thepower head and clutch and clutch actuating and controlling mechanism.

Fig. 4c, a cross sectional view taken on line 1*4, of Fig. 3.

Fig. 5, a cross sectional view taken on line 5 5 of Fig. a.

Fig. 6, a cross sectional view taken on line 6-6, of Fig. 3. Y

Fig. 7 an enlarged end elevation of the power' head, certain parts being broken away for the purpose of clearer illustration of the clutchdisengaging slide and slide actuating-mechanis Y Fig. 8, an' end elevation of the clutch disengaging slide removed, illustrating Vin particular the clutch disengaging stepped head.

Fig. 9, a side elevation of the clutch disengaging slide and slide actuating mechanism, certain `parts being broken away for the purpose of clearer illustration of fthe parts.

Fig. 10, an enlarged vertical sectional view of the power head and 4clutch and clutch actuatingv mechanism taken on line 10-10, of Fig. 1, the clutch disengaging head and slide being removed for the purpose of illustration.

Fig. l1, an enlarged rear elevation of the same and of the clutch disengaging slide and slide head, certain parts .of the latter being broken away for the purpose of illus-- tration.

Fig. 12, an enlarged horizontal sectional view taken on line 12*12, of Fig. 1, and illustrating in particular the foot or treadle control mechanism for cooperating with the clutch actuating and controlling mecha-v nism.

Fig. 13, a fragmentary perspective' view of one of-thepivoted portions of the foot or treadle control mechanism.

Similar numerals of reference designate like parts -throughout `all the figures of the drawings.

The improved drop hammer comprises a suitable frame consisting, in 4the present instance, of a base 1, adapted to support a suitable anvil `block 2. The frame further includes Va pair of suitable vertical guide members 3.

The power head, in the present instance, comprises a suitable frame consisting of a cross or base member et, mounted upon and supported by the vertical guide members 3, and provided with bearing members or pedestals 4a, lprovided with suitable bearing blocks 4b, for carrying the driving shaft 5. The shaft 5, is adapted to be driven by means of a. driving pulley 5a, and is further provided with a fixed clutch 6, the latter being secured to the shaft 5, by means of a key member 6, as shown in Fig. 3, of the drawings. The movable clutch member and actuating mechanism and the hammer actuating mechanism may be of any suitable and convenient form, and in the present instance, comprises a movable clutch member 7, arranged within andin coperative relation to the fixed clutch member 6, and provided with a hammer actuating member 8, in the present instance, in the specific form of a Winding Adrum adapted to carry and operate the hammer strap 9a, connected to a hammer head 9, the latter operating between the guide members 3, in the usual manner. The hammer actuating or drum member 8, terminates at one side in a brake hea-d 0r drum 10, said head or drum 10, being adapted to be controlled in the usual manner yby means of a brake strap 10a, secured at one end by means of a bracket and cross pin 10b, secured to the base vmember 4, of the frame,"and the free end `being connected to a connecting link or rod 11, extending downwardly and being connected at its lower end to a cross member 12, of an oscillatory foot treadle consisting of side members 12, pivotally mounted on trunnion members 1a, of the base 1, said foot controlled or treadle mechanism being` constructed and operated as hereinafter described.

As a means of bringing the movable clutch member 7, and its connected members 8 and 10, into and out of engagement with the fixed member 6, during the rotation of the shaft 5, the movable or rotatably mounted clutch member 7, is provided with the split ring members 13, normally drawn toward their retracted or disengaging positions by means of connecting springs 14, (see Fig. a) connected to the brackets 13a, said ring members 13, being adapted to be adjusted to compensate for wear, or the like, by means of a wedge member 15, linterposed between adjacent ends of the split ring members and adapted to be adjusted, in the present instance, by vmeans of an adjusting .bolt 16, and as a means of simultaneously moving the ring members 13, into and out of clutched relation with the adjacent surrounding fixed clutch 6, a rock vshaft 17, is provided, said shaft being connected to the adjacent split ends ofthe ring members by means of suitable links 17a, and being Aprovided at its opposite end with a trip arm 17h, Vthe latter being-arranged Vat the face side of the ybrake drum portion of the movable clutch and consisting in the present instance, of the dual heads or arms 17, and 17d, adapt-ed to alternately engage withvthe movable clutch engaging and releasing trip members or projections hereinafter referred to.

As a means of automatically causing the fixed clutch member 6, vto engage with the movable clutch 7, at or near the bottom 0f the working stroke of the hammer as Vthe latter descends by the release of the :movable clutch member 7, and also'to varysuch point of the clutch rengagement to Acompensate for different thicknesses of dies or work being operated upon, a variable trip member 18, is provided, said `trip -member 18, in the present instance, being circumferentially movable on the driving shaft 5, and being provided with a trip projection 18a, against which the Varm .or head '17", of the rock shaft 17, is adapted to contact thereby rocking the latter to expand the ring members 13, into contact withthe iiXed clutch 6, whereby the latter with the rotation of the driving shaft 5, will elevate the hammer head 9, for another working stroke, and as a means of adjustingthe trip mem- -ber 18, to compensate for the variable conditions above referred to, and particularly of catching the hammer `head 9, on its rebound during its working stroke, thefarm of the trip member 18, is connectedgto a'rod or link 19, the latter, in the present instance, being connected to fa crank 20,'ona shaft 21, the shaft 21, being'mounted in a bracket 22, at the rear of one of the guide members 3, and the shaft 21, being :pro-

vided with a second crank `23,*communicating with a Vsecond link 24, operated "by means of a lever 25, on the front of the machine frame within ready reach of the plurality of graduated trip projections 27",

arranged in stepped relation to each other and adapted to be moved into the plane of movement of the arm 17 d, of the trip member 17", of the rock shaft 17, 'as the latter is being carried upwardly and about by the rotation of the clutched member7, and the hammer actuating drum 8, and release the Y,

latter in any desired elevation or length of stroke predetermined upon by the operator through the foot controlled actuating mechanism hereinafter described.

As a convenient means of supporting and moving the head 27, and its projections 27h, toward and from the plane of rotation of the trip arm portion 17, of the trip arm 17 d,

, the head 27, is mounted on a longitudinally movable slide 28, adapted, in the present Vinstance, to operate in guide ways 4, of one oli the bearing blocks, said slide being provided with racks 28a, meshing with geared seg-A ments 29, (see Figs. 7 and 9) carried on a rock shaft 30, the latter being provided with a crank arm 31, connected to a connecting rod or link 32, leading downwardly and being connected to a crank V33, 'ot' a bell crank member 34, mounted on one of the trunnions la, the second arm of the crank member 34, being connected to a horizon-- tally extending link 35, said Vlink 35be ing connected at its front end to aV crank 36, carried on a rock shaft 36, the latter being operated by means of foot treadle 37. The foot treadle 37, is keyed or otherwise secured to the rock shaft 36, so as to enable the latter to be rocked or oscillated by the corresponding movement given to the foot treadle 37, and entirely7 independent of the side members 12, of the foot treadle, such arrangement permitting the trip head 27, to be operated either independently oi or in conjunction with the oscillation of the side members 12, of the foot treadle for loosening or tightening the brake drum 10, and clutch and hammer member'7 and 8, connected thereto, and operated as the operator may elect.

As a means of normally holding the en- -tire foot treadle mechanism in an elevated position and thereby holding the brake strap 10a, in locked engagement with the brake drum 10, one of the side members 12, is provided with a spiral. spring 38, connected to a bracket 1b, on a machine base, and as a means of limiting the movement imparted to the slide 28, through the rocking foot treadle 37, as hereinbefore described, and thereby causing the clutch to be released at a predetermined point in the elevation of the hammer head, the bell crank member 34, may be provn vided with an outwardly extending segment 34a, provided with adjustable sto-p pins 34h, adapted to have limited movements with respect ltothe adjacent side member 12, of the foot treadle mechanism.

From the foregoing description, taken in connection with the accompanying drawings, the operation and advantages of myinvention willbe readily understood.

Having thus described one of the embodiments of my invention, what I claim and desire to secure lby Letters Patent, is,-

, 1. In a drop hammer, a hammer, a'shaft, a drum loose on said shaftl and connected with said hammer, a brake for said drum, a clutch for connecting said drum with said shaft, and means to variably act-nate or re- -lease said clutch andto simultaneouslyl release orl actuate. said brake whereby the ried.

2. In a drop hammer, a hammer, a shaft, a clutch, hammer actuating mechanism rotatably mounted on said shaft. and adapted to be engaged by said clutch, a clutch releasing member carried by said mechanism, and a foot controlled ,tripA headv adaptedy to be moved toward and to variable engage said clutch releasing member and disengage said clutch whereby the length of the up-stroke of saidhammer may be varied.v V j 3. In a drop hammer, a hammer, a shaft, a clutch, hammer actuating mechanism rotatably mounted on said shaft and adapted to be engaged by said clutch, clutch operating member, .eans for variably operating said member and releasing said hammer actuating mechanism' for regulating the l.

length of the `down-stroke offrsaid hammer, and. a foot controlled stepped, tri phead movable toward and variably engaging said clutch operating member Vand' disengaging said clutch whereby the length of the upstroke of the hammer may be varied.

fl; In a drop hammer, a hammer, a shaft, hammer actuating mechanism rotatable thereon, aV clutch for' operatively connecting said mechanism to said shaua clutch operating member carried by saidfmechaism, andtrip mechanism for variably engaging said clutch'operating member to engage and disengage said V`clutchwherebv theV length of theV down and up-strokesof said hammer may be varied.

5. In a drop hammer, a-hammer, a hammer actuating mechanism thereon, a brake, a clutch for operatively connecting said mechanism to said shaft, a

shaft,

rotatable f iso clutch releasingmember carried by said mechanism, and foo-t controlled brake and stepped trip mechanism for controlling said clutch mechanism and variably engaging said brake and clutch releasing member to disengage said clutch whereby the length of the tip-stroke of the hammer may be varied.

6. In a drop hammer, a hammer, a shaft, hammer actuating mechanism rotatably mounted thereon, a clutch for yoperatively connecting said mechanism witlirsaid shaft, a clutch operating member carried by said mechanism, a variable trip member on said shaft for engaging said clutch operating member and throwing said clutch into engagement with said hammer actuating mechanism in variable positions whereby the length of the dowirstroke of the hammer may be varied, and =a foot controlled trip head adapted to engage said clutch operating member in variable positions-and disengage said clutch whereby the length of the rip-stroke of said hammer may be varied.

7 In a drop hammer, a hammer, a shaft, a hammer actuating mechanism loose on said shaft, a clutch for operatively connecting` said mechanism 4with the shaft, a Aclutch fre leasing member carried by said mechanism, and a foot contro-lled trip head adjustable longitudinally of said shaft, said -head having a series of steps wherebv by adjustment of said head .any one of said steps may be brought into position Vto engage saidA member to disengage the clutch whereby the length of the rip-stroke of the hammer `may be varied.

8. In.a drop hammer, a hammer,a shaft. actuating mechanism loose'on said shaft and with which the hammer viis connected, a clutch for operatively engaging said mechanism with the shaft, and foot controlled clutch engaging and releasing mechanism to variably engage and releasey said clutch whereby the length of the up and down strokes of the hammer may be varied.

SY). In a drop hammer, a hammer,a driving shaft, provided with rotatably mounted clutch and hammer actuating members, means for throwing the latter intov and out of engagement with said shaft through said clutch member, and means for operating and means for ycontrolling said means at variable relative positions to said shaft during the rotation of the latter whereby the length of the up and down-strokes of said hammer may be varied.

10. In a drop hammer, a hammer, 'a driving shaft, provided with-rotatably mounted clutch and hammer actuating members, variable trip means for throwing the latter into and out of engagement with said shaft, and means for operating and controlling said variable trip means at variable relative positions to said shaftfduringy the rotation of the latter for changing the terminal points in the working impulses imparted to said hammer actuating` member.

1l. In a drop hammer, a .frame including guide members, a driving shaft provided with fixed and movable clutch members, a hammer actuating mechanism connected to said movable clutch member, a hammer carried by the hammer actuating mechanism between said `guide members, and foot controlled means for actuatingfand controlling said clutch member at variable positions relative to and during the rotation `of said driving shaft whereby the length of .the up and down-strokes of said hammer may be varied.

12. In a drop hammer, a hammer, a driving shaft provided with rotatably mounted clutch and'hanmier actuating members, variable .means for throwing the latter into engagement with said shaft clutch and, means for throwing `.the same out of engagement with said shaft clutch and, means for Voperating and controlling said last mentioned means at variable relative positions to said vshaft and hammer actuating member during the rotation of the latter whereby the vlength of the up and down-strokes of said hammer may be varied.

13. Inadrop ha1iimer,a hammer,a frame including guide members, a driving shaft provided with fixed and movable clutch Aimmbers, a hammer actuating mechanism connected to said movable clutch member and brake drums, a brake strap on the hammer actuating mechanism, a hammer carried vby said strap drum between said .gu-ide members, and foot controlled means Afor 'simultaneously actuating and controlling said clutch and hammer strap and brake drums at variable positions relative to and during the rotation of said -driving shaft.

14. In a drop hammer, a hammer, a frame including ,guide members, a driving shaft provided with X-ed and movable clutch members, a hammer actuating mechanism connected to said movable clutch member, a hammer carried by the hammer actuating mechanism betweenv said guide members, brake mechanism for said movable clutch and hammer actuating mechanism, and means for simultaneously actuating and controlling said clutch brake and hammer actuating mechanism at variable positions "relative to and during the rotation of said driving shaft for regulating the stroke given to said hammer.

15. In a drop hammer, a hammer, a shaft, a clutch, hammer actuating mechanism rotatable on said shaft, a clutch operating member `carried by said mechanism, variable means for actuating said clutch actuating member to variably engage saidclutch with said hammer actuating mechanism whereby the length of the down-stroke of the hammer may be varied, and means for variably engaging said clutch actuating member and variably dlsengagmg sald clutch and sald hannner actuating mechanism whereby the length of the 11p-stroke of the hammer may be varied.

16. In a drop hammer, a shaft, hammer actuating mechanism rotatable on said shaft, a clutch for connecting and disconnecting said mechanism with said shaft, a clutch actuating and releasing member carried by said mechanism, means for variably actuating said clutch actuating and releasing member and engaging said clutch with said mechanism whereby the length of the downstroke of said hammer may be varied, and foot controlled adjustable trip mechanism for engaging said clutch operating member whereby to variably disengage said clutch operating member and thereby varying the length of the Lip-stroke of said hammer.

In testimony whereof have atixed my signature in the presence of two Witnesses.

WILLIAM H. WELCH. Witnesses:

W. C. GRAVES, O. C. BILLMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patenti, Washington, D. C.

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