US1798309A - Four-roll hammer - Google Patents

Description

March 31, 1931. w. w. cRlLEx 1,793,309

FOUR-ROLL HAMMER Filed July 16, 1928 4 Smets-Sheet l A TTORNEYS Marchl 31, 1931. w. w. cRlLEY FOUR-ROLL HAMMER Filed July 16, 1928 4 SheetsSheet 2 I N V EN TOR.

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W. W. CRILEY FOUR-ROLL HAMMER 4 sheets-sheet 4 Filed July 16, 192B T- ATTORNEYJ Patented Mar. 31, 1931 UNITED 'STATES `PATENT OFFICE WLLIAM W. ORILEY, OF CLEVELAND, OHIO, ASSIGNOR TO THE AJAX MANUFACTUR- ING- GOMPANY, OF EUGLID, OHIO, A CORPORATION F OHIO FOUR-ROLL HAMMER Application filed July 16, 1928.

The present invention relates, as indicated, to a four-roll hammer, and the primary object thereof is to provide a more efficient machine of the type indicated.

A further obj ect of the invention is to provide an especially efficient drive for a hammer of the type indicated.

A further object is to provide means for compensating for variations in the Wear on f the board of a machine of the type indicated.

A still further object is to provide means in a device of the class indicated for varying the stroke of the ram.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings:

Fig. 1 is a front elevation of a hammer embodying my invention; Fig. 2 is a side elevation of the same as viewed from the left of Fig. 1; Fig. 3 is a side elevation of the same as viewed from the right of Fig. 1, certain elements being removed for clarity of illustration; Fig. 4 is a plan view thereof; Fig. 5 is an elevation of a detail; Fig. 6 is an end elevation of the detail disclosed in Fig. as

Vviewed from the left of said figure; Fig. 7 is an enlarged view, partly in section, of a portion of an auxiliary trip mechanism; and Fig. 8 is an enlarged sectional view of a further detail.

Referring more particularly to the drawings, the reference numeral 10 indicates a frame in `which is slidably mounted a ram 11 having connected thereto a. board 12 with which are adapted to co-operate two pairs of rolls 13 and 14 and 15 and 16 (see Fig. 2) A motor 17 is mounted upon said frame, and the spindle of said motor is connected through flexible couplings 18 and a shaft 19 to a drive shaft 2() journalled in said frame and carrying a drive pinion 21 in mesh with a drive gear 22. A shaft 23 is journalled in said Serial No. 293,266.

frame in a horizontal plane below that of the shaft 20, and said shaft 23 carries an intermediate gear 24 and a pinion 25. The roll 13 is provided with a shaft 26, and the roll 14 carries a shaft 27, and roll gears 28 and 29 of equal pitch diameters are mounted on said shafts 26 and 27 respectively, in mesh with said pinion' 25.` A second shaft 30 is journalled iny said frame in the same horizontal plane with the shaft 23and in the same vertical plane with the shaft 20, and said shaft 30 carries said drive gear 22, an intermediate gear 31 of equal pitch diameter with the intermediate gear 24 and meshing therewith, and a pinion (not shown) similar to the pinion 25. The roll 15 is provided with a shaft on which is mounted a roll gear 32, and the roll 16 carries a similar shaft mounting a similar roll gear (not shown). It is to be understood that the gears carried by the shafts of the rolls 15 and 16 are of a pitch diameter equal to that of the gears 28 and 29, and that said gears mesh with the pinion carried by the shaft 30. A fly wheel 33 is carried on the shaft 20.

The roll 13 is journalled in a housing 34 while the roll 14-is journalled in a similar housing 35.. Housings 34 and 35 are formed with eccentric hubs 36 and 37 respectively,

and said hubs are ournalled in the hammer frame so that oscillation of the housings 34 and moves the rolls 13 and 14 respectively, toward and way from the board 12.

` The housing 34 is formed with a bifurcated radially extending arm 38 to the furcations of which is pivoted the upper forked end of a link 39, a pin 40 passing through the furcations of thearm 38 and of the link 39. The housing 35 is formed with a similar bifurcated arm 41 to which are pivoted the lower end 42 of the link 39 and the upper end 43 of a friction rod 44 by means of a pin 45 passing through the furcations of said arm and through suitable bores formedfin said ends 42 and 43.

At a suitable point as 46, there is pivoted to the frame 10 a bell crank lever, one arm 47 of which is received in a member 48 clamped to the friction rod 44, and the other end 49 of which carries a roller 50 adapted to cooper- Cil ate with a cam surface 51 formed upon the ram 11. At a lower point in the same vertical line, as 52, there is pivoted a` second bell crank lever, one arm 53 of which is received in a member 54 clamped to the friction rod 44 and the other arm 55 of which is formed with a socket 56. The outer wall of said socket 56 perforated to permit the passage of shaft 58 carrying a roller 57, said roller being normally carried entirely within the socket 56, and being` resilicntly held in such position by a coiled spring 59 sleeved on said shaft and bearing at its one end against the rear wall of the socket 56 and at its opposite end against the collar 60 rigidly mounted on the shaft 58. I provide means for overcoming the force of the spring 59 and projecting the roller 57 into the path of the cam surface 51 on the ram 11, and in this particular instance I have illustrated a solenoid coil 61 for that purpose. It is to be understood, however, that any desired means may be provided for this purpose, and that I do not intend to limit myself. to the use of a solenoid or any other specific means for accomplishing this effect. Y

The rear rolls 15 and 16 are journalled in housings 62 and 63 formed with eccentric hubs 64 and 65 respectively, said hubs being journalled in the frame so that oscillation of the housings causes movement of the rolls 15 and 16 toward and away from the board 12. Referring to Figs. 5 and 6, it will be seen that the housing 62 is formed adjacent one end with a bifurcated radially projecting arm 66. A pin 67 passes through the furcations of said arm and through a suitable bore in the upper end 68 of a connecting member 69, thus pivoting said member to said arm. The member 69 is formed with a recess 70 in its lower end, and said recess snugly receives the upper 71 of a link 72, said link being secured in said recess by means of thread and a piu 7 3 passing` through said members 69 and 72. The housing` 63 is formed adjacent the same end with a bifurcated radially projecting arm- 7 4 to which is pivoted by means of a pair of pins 75, the lower end of a sleeve 76. The lower end of said sleeve is vertically iored as 77 to permit the passage of the link 72, and said link is formed with an upwardly facing external shoulder 78 which normally registers with an upwardly facing internal shoulder 79 formed on the sleeve 76. It washer or follower 80 is sleeved on said link above said shoulders and is so formed as to rest partially upon the shoulder 78 and partially upon the shoulder 79. rlhe upper end of the sleeve 76 is bored as at 81 to permit the passage of the lower end of th-e connecting member 69, and it will be seen that said lower end constitutes a shoulder 82 which normally registers with the lower surface of the upper end of the sleeve 76. fr washer or follower 83 is sleeved on said link and is so formed as to contact with the said shoulder 82 and with said lower surface of the upper end of the sleeve 76. A compression spring 84 is also sleeved on said link and bears at its one end against said follower 8O and at its other end against said washer 83.

The housing 63 is formed adjacent its oppoeud with a second bifurcated arm 85 in the saine plane with the arm 74, and a pin 86 pivots to said arm the upper end 87 of a link 88. The lower end 89 of the link 88 is pivoted to one end 90 of a compensating` or equalizing member 91; the lower end 92 of the link 72 is pivoted to the opposite end 93 of said member; and the upper end 94 of an adjusting` rod 95 is pivoted to said member at its mid-point. The lower end of said rod passes through a lug 96 formed on or secured to the frame 10, and said lower end is threaded for the reception of adjusting nuts 97 on opposite sides of the lug 96.

In Fi 2 I have illustrated a slight modification of the above described arrangement omitting the resilient connection between the housings 62 and 63 and substituting a hinged connection. Thus it will be seen that a link 98 has its upper end 99 pivoted to the arm 66 and its lower end 100 pivoted to the end 93 of the member 91.

I prefer to mount the motor 17 resiliently upon the hammer frame in the manner disclosed in my copending application, Serial No. 293,267, filed July 16, 1928, said motor being` secured to a platform 101 hinged to the frame at 102 and having its outer edge resiliently supported by means of rods 103 passing through ears 104 on the frame, a spring 105 being sleeved upon each of said rods 103 between the platform 101 and the ear 104, and a second spring 106 being sleeved on each of said rods 103 between said ears 104 and a stop 107 ou the lower end of said rod.

The operation of the herein disclosed device is as follows: A suitable clamp (not shown) is provided for holding` the ram 11 in its elevated position. The motor 17 drives the shaft 2O which, through the pinion 21 and gear 22, drives the shaft 30 upon which are mounted the intermediate gear 31 and thc roll pinion (not shown). The gear 31, meshing with the gear 24 rotates the shaft to rotate the pinion 25, and said two pinions rotate the four roll gears. Thus it will be seen that the rolls 13, 14, 15 and 16 are constantly rotated.

Villien the ram is tripped by the operator, it falls and operates suitable latch mechanism to permit the friction rod 44 to drop. is said rod drops, it rotates the housings 34 and 35 in a clockwise direction as viewed in Fig. 2, and, due to the eccentricity of the hubs 36 and 37, the rolls 13 and 14 are moved into contact with the board 12. Frictional contact is thus established between the rolls 13 and 14 on one side, and the rolls 15 and 16 on the other side,

and the board 12, and the rotating rolls cause the board 12 and the connected ram 11 to be moved upwardly. lVith the parts in the position illustrated in Fig. 1, the cam surface 51 will come into contact with the roller 50 to rotate the bell crank pivoted at 46 in a clockwise direction as viewed in Fig. 3 to elevate the friction rod 44 and thus to move the rolls 13 and 14 out of contact with the board 12. This cycle will be repeated until the operator permits the above mentioned clamp to operate to hold the ram 11 in elevated position.

If the operator desires a shorter and quicker stroke of the ram, he energizes the solenoid 61 (or operates such mechanism as may be supplied for reciprocating the shaft 58) to move the roller 57 out of the socket 56 and into the path of the Cam surface 51. It will be obvious that, with the roller 57 in this projected position, the friction rod 44 will be elevated to move the rolls 13 and 14 out of contact with the board 12 at an earlier moment in the elevation of the ram, and thus will shorten the stroke of the ram.

Referring to Fig. 2, it will be seen that the adjusting rod 95 acts as an abutment to prevent the pressure applied to the rolls 15 and 16 when the rolls 13 and 14 are moved into contact with the board 12 from rotating the housings 62 .and 63 in a countercloclwise direction. It will also be seen that the reaction of the housing 62 is 'borne by the end 93 of the compensating member 91 while the reaction of the housing 63 is borne by the end 90 of said member 91. Obviously, then, any unevenness in the board 12 which causes, at a given moment, a greater pressure on the roll 16 thanon the roll 15, will be permitted to move the housing 63 slightly in a counterH clockwise direct-ion. However, such movement will cause the link 88 to depress the end 90 of the member 91 about a iixed pivot formed by the upper end 94 of the adjusting rod 95, and such movement will elevate the end 93 of said member 91 to rotate the housing 62 by a corresponding amount in a clockwise direction. Thus the pressure, at this given moment, of the roll 16 against the board 12 and the pressure of the roll 15 against said board are equalized. the pressure of the board against the roll 1F exceeds, at any time, the pressure of the board against the roll 16, the opposite action will take place and again the pressures will be almost instantaneously equalized. It will be obvious that such an arrangement will reduce the wear on the board and will further increase the efficiency of the rolls in their operation on the board.

Referring now to Figs. 5 and 6, it will be seen that the action of the arrangement therein disclosed is similar to that just described, but is improved by the addition of the resilient connection between the housings Clearly, ifv

62 and 63. Thus, if the pressure against the roll 16 exceeds that against the roll 15, again the end 90 of the member 91 will be depressed and the end 93 thereof will be elevated.

Such elevation of the end 93 moves the link,

72 upward, and the shoulder 78 lifts the follower 8() from its engagement with the shoulder 79, compressing the spring 84. The force of the spring 84 is thus added to the pressure of the rolls 15 and 16 against the board, and furthermore, the spring 84 acts to return the housings 62 and 63 to their normal positions as soon as the unevenness which has caused the movement of the housings has passed beyond the rolls. clear that, if the pressure against the roll 15 exceeds the pressure against the roll 16, the link 72 will be moved downwardly, and in such an event, the end 82 of the member 69 will remove the follower 83 from its contact with the sleeve 76 to compress the spring 84.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made regards the mechanism herein disclosed, provided the meansstated by any of the following claims or the equivalent of such stated means be employed. Y

I therefore particularly point out and distinctly claim as my invention:

1. In a board hammer, a roll and a board, a friction rod for moving said roll into contact with said board, a ram mounted to rew ciprocate in the frame of said hammer, a bell crank trip lever pivoted to said frame and having one arm engaged with said friction rod and its other arm disposed in the ascend.- ing path of said ram, and a second trip lever pivoted to said frame and having its onearm engaged with said friction rod, the other arm of said second lever having a portion movable relatively to said arm into and out of the ascending path of said ram.

2. In a board hammer, a. roll and a board,

a friction rod for moving said roll into con tact with said board, a ram mounted to reciprocate in the frame of said hammer, a bell crank trip lever pivoted to said frame and having one arm engaged with said friction rod and its other arm disposed in the ascending path of said ram, and a second bell cranl: trip lever pivoted to said frame and having its one arm engaged with said friction rod, the other arm of said second lever having a portion movable relatively thereto and nor mally disposed out of the path of said ram, said portion being movable thereinto at the will of the operator without affecting the position of said first mentioned arm.

3. In a board hammer, a roll and a board, a friction rod for moving said roll into contact with said board, a ram mounted to reciprocate in the frame of said hammer, a trip lever pivoted to said frame and having one arm engaged with said friction rod and its It will beY other arm disposed in the ascending path 0f said ram, and a second two armed trip lever pivoted to said frame and having its one arm engaged with said friction rod, the other arm of said lever being disposed out of the path of said ram, and means carried by said other arm and movable relatively thereto and proje-ctible into the ascending pat-h of said ram.

4i. ln a board hammer, a roll and a board, a friction rod for moving saifl roll into contact with said board, a ram mounted to reciproate inthe frame of said hammer, a trip lever pivoted to said frame and having one arm enga ged with said friction rod and its other arm f dis nosed in the ascendinvr oath of said ram ze l a a second trip lever pivoted to said frame and having its one arm engaged with said friction rod, a shaft carried by the other arm of said second lever, said shaft being disposed parallel to the pivotal axis of said lever, and means for shifting said shaft transversely of said leve-r arm into and out of the ascending pat-h of said ram.

5. ln a board hammer, a roll and a board, a friction rod for moving said roll into contact with said board, a ram mounted to reciprocate in the frame of said hammer, a trip lever pivoted to said frame and having one arm engaged with said friction rod and its other arm disposed in the ascending path of said ram, a second trip lever pivoted to said frame and having its one arm engaged with said friction rod, the other arm being formed with a socket in its inner face, a shaft carried by said other arm parallel to the pivotal axis of said second lever, a. roller mounted on said shaft and normally disposed within said socket, and means for shifting said shaft transversely of said lever arm and moving said roller into the ascending path of said ram. Y

6. In a board hammer, a roll and a'board, a friction rod for moving said roll into contact with said board, a ram mounted to reciprocate in the frame of said hammer, a trip lever pivoted to said frame and having one arm engaged with said friction rod and its other arm disposed in the ascending path of said ram, a. second trip lever pivoted to said frame and having its one arm engaged with said riction rod, the other arm being formed with a socket in its inner face, a shaft carried by said other arm parallel to the pivotal axis of said second lever, a roller mounted on said shaft, a compression spring sleeved on said shaft and tending normally to hold said roller in said socket, and means adapted to overcome the force of said spring and to shift said shaft transversely of said lever arm and said roller into the ascending path of said ram.

ln aboard hammer, a roll and a board, a friction rod for moving said roll into contact with said board, a ram mounted to recipro- Cate in the frame of said hammer, a trip lever pivoted to said frame and having one arm engaged with said friction rod and its other arm disposed in the ascending path of said ram, a second trip lever pivoted to said frame and having its one arm engaged with said friction rod, the other arm being formed with a socket in its inner face, a shaft carried by said other arm parallel to the pivotal avis of said second lever, a roller mounted on said shaft, a compression spring sleeved on said shaft and tending normally to hold said roller in said socket, and a solenoid coil surrounding said shaft and guided to oscillate with said lever arm but against movement in a line parallel with the pivotal axis of said lever, said solenoid coil, when energized, being adapted to overcome the force of said spring and to shiftl said shaft transversely of said lever arm and said roller into the ascending path of said ram.

8. ln a board hammer, a ram slidable in a frame, and means for lifting said ram including a board secured to said ram, a pair of rolls disposed on each side of said board, a motor, a drive shaft journalled in said frame in line with the spindle of said motor, a flerible coupling connecting said drive shaft to said motor spindle, a pinion on said drive shaft, an intermediate shaft journalled in said frame, a gear on said intermediate shaft n'ieshing with said pinion, a second gear on said intermediate shaft, a second intermediate shaft journalled in said frame in the same horizontal plane with said first intermediate shaft, gear on said second intermediate shaft having a pitch diameter equal to that of said second gear on said first intermediate shaft and meshing therewith, a shaft on each of said rolls, a gear on each of said roll shafts, and a pinion on each of said intermediate shafts, each pair of said roll shaft gears meshing with one of said intermediate shaft pinions.

9. In a board hammer, a ram slidable in a frame, and means for lifting said ram including a board secured to said ram, a pair of rolls disposed on the front side of said board, a pair of rolls disposed on the bach side of said board, a motor, a drive shaft ournalled in said frame in line with the spindle of said motor, flexible coupling connecting said drive shaft to said motor spindle, a flywheel on said drive shaft, a pinion on said drive shaft, a back intermediate shaft journalled in said frame, a gear on said back intermediate shaft meshing with said pinion, an infermediate gear on said back intermediate shaft, a front intermediate shaft journalled in said frame, an intermediate gear on said front intermediate shaft h avin a pitch diameter equal to that of said back intermediate gear and meshing therewith, a shaft on each of said rolls, gear on each of said roll shafts, a ninion on said back intermediate shaft meshing With both of said back roll gears,

and a pinion on said front intermediate shaft meshing with both of said front roll gears.

10. In a board drop hammer, the combination of two pairs of lifting rolls, one pair of said rolls being journalled one above the other in eccentric housings, an arm projecting from the upper of said housings adjacent one end thereof, an arm projecting from the lower of said housings adjacent the corresponding end thereof, a second arm projecting from said lower housing adjacent the opposite end thereof, an adjusting` rod, a lever pivoted substantially at its mid-point to said adjusting rod, a link connecting one end of said lever to the arm of said upper housing, a link connecting the other end of said lever to said second arm of said lower housing, said lever and links permitting relative movement of said housings with respect to each other and resilient means connected to said first arm of said lower housing, and cooperating with said first-mentioned link tending to prevent such relative movement.

ll. In a board drop hammer, the combination of two pairs of lifting rolls, one pair of said rolls being j ournalled one above the other in eccentric housings, an arm projecting from the upper of said housinos adjacent one end thereof, an arm projecting from the lower of said housings adjacent the corresponding end thereof, a second arm projecting from said lower housing adjacent the opposite end thereof, an adjusting rod, a lever pivoted substantially at its mid-point to said adjusting rod, a link connecting one end of j said lever to the arm of said upper housing,

a link connecting the other end of said lever to said second arms of said lower housing, said lever and links permitting relative movement of said housings with respect to each other, a sleeve pivoted to said rst arm of said lower housing, said first-mentioned link being slidably received in said sleeve, and a compression spring cooperating with said sleeve and with said link and tending to prevent such relative movement.

l2. In a board drop hammer, the combination of two pairs of lifting rolls, one pair of said rolls being j ournalled one above the other in eccentric housings, an arm projecting from the upper of said housings adjacent one end thereof, an arm projecting from; the lower of said housings adjacent the corresponding end thereof, a second arm projecting from said lower housing adjacent the opposite end thereof, an adjusting rod, a lever pivoted substantiaily at its mid-point to said adjusting rod, a link connecting one end of said lever to the arm of said upper housing, a link connecting the other end of said lever to said second arm of said lower housing, said lever and links permitting relative movement of said housings with respect to each other, a sleeve pivoted to said first arm of said lower housing, said first-mentioned link being slidably received in said sleeve, an upwardlyfacing internal shoulder formed in said sleeve, an upwardly facing external shoulder formedon said link and adapted to register with said sleeve shoulder, a follower sleeved on said link within said sleeve andV adapted normally to `be supported on both said shoulders, and a compression spring sleeved on said link within said sleeve and having its one end abutting against said follower, whereby said spring tends to maintain said shoulders in registry.

13. In a board drop hammer, the combination of two pairs of lifting rolls, one pair of said rolls being journalled one above the other in eccentric housings, an arm projecting from the upper of said housings adjacent one end thereof, an arm projecting from the lower of said housings adjacent the corresponding end thereof, a second arm projecting from said lower housing adjacent the opposite end thereof, an adjusting rod, a lever pivoted substantially at its mid-point to said adjusting rod, a link connecting one end of said lever to the arm of said upper housing, a link connecting the other end of said lever to said second arm of said lower housing, said lever and links permitting relative movement of said housings with respect to each other, a sleeve pivoted to said first arm of said lower housing, said first-mentioned link being slidably received in said sleeve, an upwardly-facing internal shoulder formed in said sleeve, an upwardly-facing external shoulder formed on said link and adapted to register with said sleeve shoulder, a follower sleeved on said link within said sleeve and adapted normally to be supported on both said shoulders, a downwardly-facing internal shoulder formed in said sleeve, a downwardly-facing external shoulder on said link and adapted to register with said sleeve shoulder, a follower sleeved on said link within said sleeve and adapted normally to abut against both said downwardly-facing shoulders, and a compression spring sleeved on said link within said sleeve and bearing at its one end against one of said followers and at its other end against the other of said followers, whereby said spring tends to maintain -said respective link shoulders in registry with said respective sleeve shoulders.

14:. In a board drop hammer, the combination of two pairs of lifting rolls, one pair of said rolls being journalled one above the other in eccentric housings, an arm projecting from the upper of said housings adjacent one end thereof, an arm projecting from the lower of said housings adjacent the corresponding end thereof, a second arm projecting from said lower housing adjacent the opposite end thereof, an adjusting rod, a lever pivoted substantially at its mid-point to said adjusting rod, a link connecting one end of said lever to the arm of said upper housing,

e. link connecting the other end of seid lever to said second arm of said lower housing, said lever und links permittingy relative movement of said housings With respect to each other, and resilient means connected to said first erm of Seid lower housing, and cooperating with seid first-mentioned link tending to prevent such relative movement.

Signed by me, this 6th day of July, 1928. VILLAM lV. CRILEY.

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