US533432A - Power-hawimer - Google Patents

Description

3 Sheets-Shet 1.

W. H. BOTTING. POWER HAMMER.

No. 533,432. Patented Feb. 5, 1895.

(No Model.) 3 Sheets-Sheet 2.

W. H. BOTTING. POWER HAMMER.

No. 533.432. Patented Feb. 5,1395.

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(No Model.

W. H. BOTTING. POWER HAMMER.

Patented Feb. 5,1896.

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To aZZ whom it may concern:

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WILLIAM H. BOTTING, OF FITGI-IBURG, MASSACHUSETTS.

POWER HAMMER.

SPECIFICATION forming part of Letters Patent No. 533,432, dated February 5, 1895.

Application filedMlay '7, 1894. Serial No; 510,351- (No model.)

Be it known that I, WILLIAM H. BOTTING, of Fitchburg, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Power- Press Hammers; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being bad to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates to improvements in hammers, such as are employed for forging, punching, shearing, &c., and more particularly to that class in which the hammer or reciprocating member is moved positively in both directions.

It has for its object to provide a simple quick acting machine in which the length of stroke may be regulated and in which the hammer may be caused to automatically make a single complete reciprocation of full power.

The invention consists in certain novel details of construction and combinations and arrangements of parts all as will be now described and pointed out particularly in the appended claims.

Referring to the accompanying drawingsi Figure 1 is a front elevation of a machine constructed in accordance with my invention. Fig. 2 is a rear view of the same. Fig. 3 is a top plan view of the working mechanism without the framing. Fig. 4. is an elevation of a portion of the frame showing the means for holding the hammer elevated. Figs. 5 and 5 are details of the shifter rod. Fig. 6 is a detail for the starting shifter. Fig. 7 is an elevation of the main gear. Fig. Sis a modified form of clutch gearing.

Similar letters of reference in the several figures indicate the same parts.

The letter A indicates the standard frame between the sides of which is located the anvil or bed B for supporting the stationary parts of the dies or other tools when such devices are used.

In or on the inner faces of the sides of the frame A, are guide ways'a. in which the hammer or reciprocating member Gworks as is usual in this class of powerhammers. The

hammer iscarried on the lower end of a stand ard O havlng gear teeth or rack bars on each side with which mesh gear wheels 0 (Figs. 1

and 3) carried byshafts O journaled in the frame and also bearing larger gear wheels O in mesh with each other, and one of them meshing with a drive wheel D itself adapted to be driven in either direction through the large bevel gear D on its side and smaller bevel pinions D journaled loosely on the power shaft E, but adapted to be clutched therewith as will presently appear.

The power shaft E rotatesconstantly inone direction, in the construction shown, forward, and as the bevel pinions D mounted. thereon mesh with the drive wheel on opposite sides, itis obvious that the said wheel may be driven in either direction at will by simply clutching one or the other of the pinions with its shaft and by throwing the pinion into and out of clutch at the proper moments the length of V the stroke may be accurately governed.

In the construction shown in Figs. 2 and 3 there are two clutch-collars F F keyed to the power shaft outside of the pinions and having suitable projections and recesses, or more properly, clutch surfaces ff for locking the collars and pinions together for rotation with the shaft. The clutch collars are movable longitudinally of the shaft and are provided with incline-faced projections G with which inclinefaced projections G on the shifter bar H may be brought into contact for causing the necessary longitudinal movement of the said collars to. clutch with or disengage from the pinions. Three of these projections G are carried by the shifter bar-two of them for moving the clutch collar F into and out of engagement, and the other for moving the clutch collar F" out of engagement only, the latter collar being moved into engagement by a relatively long incline f 2 on its outer face with which a manually controlled shifter I is adapted to come in contact. This latter shifter I (see Figs. 1, 3 and 6) is preferably in the form of a spring pressed bolt supported at one endon a pivoted angular lever'i adapted to be moved through the medium of the connectin g rod 6, shaft t and treadlelt'i the latter being located in'front of the hammer in convenient position for the workrnans foot.

The shifter rod His moved automatically by means of a pinion K, Fig. 5, carried by a shaft and having a transverse arm is. The

pinion K meshes with a rack K on the under side of the shifter rod and its arm is projects in position to be struck by a pin or pins inserted in one or more of a series of apertures d d in the face of the drive wheel and by which the pinion is turned to move the shifter rod in one direction or the other. The length of the stroke it will be seen can be regulated by inserting the shifter pins in different apertures in the drive wheel.

From the foregoing the operation of this part of the invention will be understood to be as follows:When the workman presses on the treadle i the shifter I is advanced and as the shaft E rotates the incline causes the clutch collar (Fig. 8) at the right to be thrown into clutch with its bevel pinion thereby rotating the drive wheel in the proper direction to cause the descent of the hammer. As the hammer descends one of the pins in the drive wheel will strike the arm move the shifter rod into position for projection G to engage incline G on collar F disconnecting the collar F located on the right side and simultaneously throwing the projection G on the left side into position to engage the incline G on the outer side of collar F causing said collar F to move into clutch, thereby reversing the movement of the drive wheel and causing the ascent of the hammer. As it reaches the up per limit of its movement a pin on the drive wheel engages the opposite side of the arm 70 and moves the shifter in the opposite direction, throwing the left hand collar out of clutch and leaving the parts in position to be again started by the workman as just described. When a short stroke is desired, or a stroke less than would call for a complete turn of the drive wheel, it is necessary that two pins be employed, one to move the shifter in one direction and the other to move the shifter in the opposite direction and for this purpose two sets of holes 61 d are shown and by increasing the number of holes the range of the hammer stroke maybe regulated to a nicety, as one pin will shift the arm 70 and shifter rod in one direction, and the direction or movement of wheel D being reversed, the other pin will shift said parts in the opposite direction before the wheel completes its revolution, the particular moment being determined by the location of the pins.

To retain the hammer in elevated position while out of gear with the power shaft, I provide a vertical shaft M journaled in suitable bearings on the side of the frame A and connect it through an arm M (Fig. 4) and connecting rod M (Fig. 1) with the right hand clutch collar in such manner that as said collar is moved it will cause a partial rotation of the shaft. This shaft has a series of pins m in it, corresponding in height to the positions of the hammer when making long or short strokes. These pins m co-operate with a bolt N adapted to be placed in any one of a series of apertures n (dotted lines Fig. 1) in the frame. The bolt N projects in beneath the hammer in position to support the latter when at the upper end of its stroke, but being connected to the collar F, Fig. 1, through the medium of the connections M M M when the said collar is shifted to the left to start the hammer the bolt is withdrawn, when the hammer is free to descend as before described.

The power shaft may be driven from any suitable source through a belt pulley O for instance and it preferably is provided with a balance wheel or wheels, such as P, which however are not rigidly attached to the shaft, but are held against rotation independent of the shaft by friction, for which purpose the shaft is slightly tapered and a nut screwing directly against the wheel or as is common against an interposed spring washeror equivalent holds the wheels in place and should the shaft be suddenly arrested permits the wheels to rotate ahead, thereby overcoming the danger of breaking the gearing should the shock due to the momentum of the wheels fall upon it, which arrangement being old and well known does not of itself constitute any part of my present invention.

It will be noted that the hammer is capable of a rapid movement,butis under the perfect control of the workman. The advantages dueto a positive forward movement are socured and at the same time the range of movement of the hammer may be changed when desired to give a long or short stroke.

The hammer may be used for forging, punching, shearing, 850., and in the drawings, I have shown a pair of dies Q, a punch Q and shears Q between the hammers faces but it will be understood that I do not wish to be limited to such devices as I may employ the hammer for any well known purpose.

Any preferred reversing gear may be employed instead of that shown. For instance, instead of employing clutch collars as heretofore described, the bevel pinions may be keyed to the shaft and moved longitudinally into or out of engagement with the drive wheel as illustrated in Fig. 8. In this figure it will be seen that the said bevel pinions themselves carry the inclines G with which the shifter rod inclines G come in contact, but in all other respects the mechanism is the same as heretofore described.

Having thus described my invention, what I claim as new isr 1. In a power hammer, such as described, the combination with the frame and reciprocating member, of gearing in mesh with said reciprocating member for positively advancing and retracting the same, a power shaft and reversing gear interposed between the power shaft and drive gear; substantially as described.

2. In a power hammer, such as described, the combination with the frame the hammer reciprocating therein having the upwardly extending toothed portion and the gear in mesh therewith for moving the hammer positively in both directions, of the drive wheel,

IIO

the power shaft, reversing gear interposed between the power shaft and drive gear and a shifter for said reversing gear moved by the drive wheel; substantially as described.

3. In a power hammer, such as described, the combination with the frame, the hammer reciprocating therein and having the upwardly extending toothed portion and the gear in mesh therewith for moving the hammer positively in both directions, of the drive wheel, the power shaft, reversing gear interposed between the power shaft and drive gear, a shifter for said reversing gear and an adjustable projection moved by the drive wheel for moving the shifter whereby the length of the stroke may be varied; substantially as described.

4. In a power hammer, such as described, the combination with the frame, the hammer reciprocating therein and having the upwardly extending toothed portion and the gear in mesh therewith for moving the hammer positively in both directions, of the drive wheel, having a series of apertures therein, the power shaft, reversing gear interposed between the power shaft and drive gear, a shifter for said reversing gear and a pin or projection mounted in one of the apertures in the drive wheel for moving the shifter, substantially as described.

5. In a power hammer, such as described, the combination with the frame, the hammer reciprocating therein and having the upwardly extending toothed portion and the gear in mesh therewith for moving the hammer positively in both directions, of the drive wheel, the power shaft, reversing gear interposed between the power shaft and drive wheel,'a shifter cooperating therewith and moved by the drive wheel to automatically reverse when the hammer is at the bottom of its stroke and a treadle controlled shifter for starting the mechanism in the opposite direction; substantially as described.

6. In a power hammer, such as described, the combination with the frame, the hammer reciprocating therein, the drive gear for reciprocatin g the hammer, the power shaft and interposed reversing gear, of a lock for holding the hammer elevated, connected with the reversing gear for simultaneous operation, an automatic shifter for reversing when the hammer is at the bottom of its stroke and a manually controlled shifter cooperating with the reversing gear and lock to release the latter and throw the reversing gear into operation when the hammer is at the top of its stroke; substantially as described.

7. In a power hammer, such as described, the combination with the frame, the hammer reciprocating therein, the drive gear for reciprocating the hammer, the power shaft and interposed reversing gear, of the lock for holding the hammer elevated and a connection between the lock and reversing gear, whereby when the gear is moved to causea descent of the hammer, the lock is thereby withdrawn and a shifter for the reversing gear; substantially as described.

8. In a power hammer, such as described, the combination with the frame, the hammer reciprocating therein, the drive gear for moving the hammer, the power shaft and the interposed reversing gear, mounted on the power shaft and having the inclined faced projections thereon, of the longitudinally movable shifter rod having the inclined faced projections for cooperation with those on the reversing gear, the rack on the shifter rod, the pinion and arm and the pin moved by the drive gear cooperating with the arm to move the shifter; substantially as described.

9. In a power hammer, such as described, the combination with the frame, the hammer reciprocating therein and having the toothed upward extension, the pinions meshing therewith, the gear wheels on the pinion shafts geared together and the drive wheel in mesh with said gear wheels, having the bevel gear on one side, of the power shaft the bevel pinions thereon in mesh with the drive wheel, the clutch collars on the power shaft cooperating with the bevel gears, the shifter moved by the drive wheel and having projections thereon controlling the movements of one collar in both directions and the other collar in one direction, and a manually controlled shifter controlling the movement of the last mentioned collar in the other direction,whereby the drive gear is thrown into operation by the workman and automatically returned to normal position; substantially as described.

WILLIAM H. BOTTING.

Witnesses:

JOHN M. BALLOU, JOSEPH L. CLARK.

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