US1255793A - Power-hammer. - Google Patents

Description

K. SALO & M. SHERMAN.

POWER HAMMER.

APPLICATION FILED SEPT. 5. I916- Patented Feb. 5, 1918.

2 SHEETS-SHEET'I.

WITH/885: 6 f IIVI/ENTORS:

K. SALO & M. SHERMAN.

POWER HAMMER.

APPLICATION FILED SEPT. 5. I916.

Patenfed Feb. 5,1918.

2 SHEETS-SHEET 2 lNl/E/VTUHS:

A TTOR/VEY WIT/Vt SSES.

connected to an elastic u 'rnn sTArns PATENT OFFICE.

KARL SALO AND MI AEDSHEBM N,

Q 5 INDI NA POLIS, INDIANA.

rewrite-Hamming. 5

. Application filed S ptem e 5, 1916. Serial No. 118,496. m

Q i of the idly and with moderate power on meta more especially for shaping sheet metal" to various forms,

the invention spring or elastic yoke that is eonnectedwith a crank pin, the latter being operated under control at intervals by means of suitable clutch connections.

hammer body to the controlling spring in machines of the abo e-mentioned character, which connecting means shall be strong and saving in cost of mate to provide improved means for operating and controlling the clutch mechanism whereby the operation of the" hammer is controlled,in order to attain durability and ef- I in an improved manner and avoldficiency loss of time and expense usually entailedbecause'fof the necessity for making frequent repairs to the machine.

With the above-mentioned and other objects in view the invention consists in im-' proved means whereby consisting also in improved means for; operating and controlling a clutch device"; and,

further the invention consists also in the novel parts and combmatlons' and arrangements of described panying claims.

parts as hereinafter particularly which Specification of Letters lateut.

jhavingreferonce more particularly to the type of power hammer in which the body of the hammer is actuated and controlled means of a hammer body i .YQ he invention body 18 is and further defined inthe accom-,,

pivptal devices.

PatentedFeb. 5, 1918.

parts of the improved means for connecting' the hammer body to its operatin yoke. Fig. 5 is a section on the line V on Fig. 1. Fig. 6 is a perspective view of the improved hammer body. Fig. 7 is a section on the line VII-VII on Fig. 2. Fig. 8 is a fragmentary section on the line V III, VIII on Fig. 1.' Fig.9 is a. fragmentary section also on the line VIII-VIII. Fig. 10 is a perspective view of the improved devices comprised inthe connections between the hammer body and its operating yoke: Fig. 11 is a central section of one of the rollers with which the machine is commonly provided. Fig. 12 is a vertical section of the hammer body on the line XII-XII on Fig. 7. Fig. 13 is'a section on the line XIII- XIII on Fig. 2. Fig. 14 is a perspective view of the improved roller comprised in the improved clutch controller.

Similar reference characters on the differit 'ent figures of the drawings indicate like ele- An object of the invention is to provide improved means whereby to connect the.

ments or features of constructionherein referred toflin detail. a

The particular machine with which the invention is illustrated and to which the invention is advantageously applied comprises a pillar 1 which supports a table in the formof a projecting arm. 2 having an anvil 3thereon provided with a removable die or block 4:. The pillar supports also a frame 5 above the arm which has a guide head 6 on its end, a drivingshaft 7 being rotatably mounted in the frame and having crank plate or disk 8 secured thereto to which. a crank pin 9 is adjustably connected so as to vary the length of stroke of the hammer. A..connecting rod 10 is connected to the crank .pin and hasa bow-shaped spring or flexible yoke 11 secured thereto. Two links 12 and 13 are pivotally connected to one end of .the spring or yoke and the links have a roller 14 connected thereto... Two links 15 and16 are pivotally connected to the opposite end of the'spring or yoke andhave a roller 17 connected thereto. A hammer guided for vertical movement on the guide head 6 and has a suitable dieyor hammer head 19. removably connected therep tytdcoiiperate withthedie or block i of Referring to the drawings,.-Figu1-e 1 isa. front elevation and Fig. 2 a side elevation-l of a popular type; of power-- hammer to} he invention is applied. Fig. 3 isai nected in an improved manner with the rollers .14 and .17, I the rollers In carrying outthe objects of the invention the hammer body 18 is provided with holes 21 and'22 forward of the aperture and also sockets 23 and 24 rearward of the aperture to fornr pivot bearings in which pivots 25 and 26 are removably supported,

onelpivotextending through the bearing 21 is provided. The retaining pin is suitably secured in place, being preferably provided with a head on one end and a key 32 in its opposite end. The rollers 27 and 28 preferably have oil holes 33 therein. Two metallic links are'provided' for connecting the hammer head with the elastic-yoke andpreferably' are composed of steel, one link having a straight main portion 34 on the ends of which are crooks 35 and 36, one crook embracing the rollerl and the other embraccarried about the axis of theshaft 7, with ing the roller 27. Both links arealike, the remaininglink having a main portion 37 on which are crooks 38 and 39, one crook embracing the roller 17, the other embracing the roller 28. The arrangement of the links that connect the hammer body with the yoke is such that permits free pivotal movement of the links when the yoke rocks relatively to the hammer body as the crank pin 9 is the minimum 7 resistance and wear in the pivotal connections. I

In the machine described the shaft 7has apulley 4C0 rotatably mounted thereon and a driven by a belt 11, the pulley being pro-.

vided Iwith'a suitable clutch device 42 which is adapted to be frictionall'y engaged by a metallic clutch sleeve 43 that is splined on the. shaft and has a circumferential groove 14 to receive controlling devices. When op-.

erating the machine the clutch sleeve is'frequently moved with the result that the side walls of the groove are rapidly worn away and the faces of the walls become deformed due to uneven wear of the metal thereof. A shifter is provided which'has two arms 45' and 16 and is supported on a pivot' shaft 4:7" mounted on the frame 5 and provided with an operating arm l8.which may be variously operated, being preferably connected by suitable means with a springretracted foot lever 49 mounted on the pillar l'of the machine. carrying out the object of the invention, are provided with metallic stub axles 50 and 51 respectively that extend into the groove 44 and have rollers 52 and 53 thereon that con The arms 45 and 46, in

posed of suitable metal that differs in character from that ofthe metal of the axles on which the bushings rotate. The metals are of suitable character to enable the several parts to operate with the minimum amount of wear when not supplied with lubricating oil and permit the rollers to rotate in contact with the wall of the groove 4%, especially on being forced into contact therewith when the clutch sleeve is forced into contact with the clutch device of the pulley. In practical use the pulley 40 may rotate idly on its shaft until the workman arranges his work, and when hammering is required the operator causes the clutch' shifter to be moved to bring the-clutch sleeve 1 forward into contact with the clutchidevice 42 which enables the pulley to rotate the driving'shaft 7 to operate the hammerin the customary manner but without entailing destructive wear of the appliances. whereby the hammer body is connectedwith the elastic yoke orsprin'g 11, excessive wearand renewals of the stub axles or pins 50 and'51 being also avoided as a result of thepresent improvement. V

Having thus described the invention, what is claimed as new isv 1. In a power hammer,rthe combination of a hammer body'having an opening therein, two pivots connected to the hammer body and extending across the openingv therein, two rollers on the pivots-respectively within the opening, two metallic links comprising each a straight main portion and. a crook on each end thereof, one crook of one of the links embracing one of the rollers,one crook of the remaining link embracing the remainingroller, a roller embraced by the remaining one of the crooksof one of the 1inks,.a roller embraced bythe remaining one of the crooks-oftheremaining link, two pivots in thetwo last-described rollersrespectively and two pairs oflinks, one pair being connected to one of the use described pivots, the remainingpair of links being'connected to the other. of the'lastdescribed pivots, with means for movably guiding thehammer, andmeans connected to the pairs of links for moving the hammer body: i a

2'. In a power hammer, the combination of a hammer body having an aperture therein and also pivot bearings on opposite sides'of the aperture,- the bodv having also a pin hole extending therethrough and'intersecting the pivot bearings, two pivots extending I through the aperture and seated in the bear-' ings on opposite sides of the aperture,eachf V ture,

guided by the frame,

pivot having a pin hole therein, two rollers onthe pivots respectively within the apera retaining pin inserted in all the pin holes, a securing device holding the retaining pin in the pin holes, and two links connected to the rollers respectively, with means for movably guiding the hammer body, and means connected to the links for. moving the hammer body.

3. In a power hammer, the combination with a frame, a hammer body movably a shaft rotatably mounted on the frame, means connected with the shaft and the hammer body adapted to operate the body, a pulley rotatably mounted on the shaft and having a clutch device thereon, and a metallic clutchsleeve splined on the shaft and adapted to be engaged with the clutch device, the sleeve having a circumferential groove therein, of a shifter lever pivotally mounted on the frame and having two arms provided each with a metallic stub axle that extends into the groove, each axle having a metallic roller thereon to contact with the opposite walls of the groove, the roller havin a metallic bushing therein that bears on t e stub axle and differs from the character of the metals of the axle and the roller, the metal of the roller differing from that of the sleeve.

In testimony whereof, we afiix our signatures in presence of two witnesses.

KARL SALO. MICHAEL SHERMAN. Witnesses:

L. M. ROWE, E. M. CRAWFORD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

Images