US940201A - Variable-speed driving mechanism. - Google Patents

Description

H. G. SGHROEDER. VARIABLE SPEED DRIVING MECHANISM.

APPLICATION FILED JAN. 14, 1909.

Patented Nov. 16. 1909.

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' APPLICATION FILED JAN.14, 1909.

Patented Nov. 16, 1909.

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H. G. SGHROEDER. VARIABLE SPEED. DRIVING MECHANISM.

. APPLICATION FILED JAN. 14, 1909. Patnted N'OVl 16' U 3 SHEETSSHEBT 3.

' UNITED STATES PATENT OFFICE.

HANS C. SCHROEDER, OF GHICAGO, ILLINOIS, ASSIGNOR TO THE GOSS PRINTING PRESS COMPANY, OF CHICAGO, ILLINOIS,'.A CORPORATION OF ILLINOIS.

VARIABLE-SPEED DRIVING MECHANISM.

Specification of Letters Patent.

Patented Nov. 16, 1909.

To all whom it may concern:

Be it known that I, HANS C. SCHROEDER, a subject of the German Emperor, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Variable- Speed Driving Mechanism, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to variable speed drivlng mechanism particularly adapted for the driving of printing presses, and its object is to produce a new and improved driving mechanism which, driven by a suitable source of power-preferably a high speed motor operating at a constant speed-may be readily and easily shifted so as to drive the press at a slow speed or high speed rate, and particularly to produce such a driving mech'- anism as will permit the high speed to be thrown in before the slow speed is thrown.

off so that there may not lapse an intervalduring the passing from one to the other during which the press, running only upon its momentum, would be likely to slow down, causing a sudden jerk upon the throwing in of the positive drive and cansing the breakage of webs.

In the draw1ngs,Figure 1 is a top or plan view; Fig. 2 is an end view, showing a portion of the side frame of a press and severalof the driving gears in dotted lines; Fig. 3 is a detail, being a section on line 3-3 of Fig. 1, showing a side elevation of one of the clutch members, the friction drive therefor and the brake; Fig. 4 is an enlarged detail, being a section on line 14 of Fig. 1; Fig. 5 is an enlarged detail, being a section on line 5-5 of Fig. 4; Fi 6 is an enlarged detail, being a section on ine 6-6 of Fig. 5; and Fig. 7 is a detail, showing one of the eccentrics for shifting the movable shaft.

Referring to the drawings,8 indicates a bed-plate, and 9-10 indicate portions of the side frame upon which the base of the "side frame 12 (seen in dotted lines in Fig. 2)

of the press is mounted, and which serve to support some of the parts hereinafter described.

-13 indicates a driving shaft, which is journaled in suitable bearings, as 14, on the bedplate 8, and is driven by a driving pinion 15 secured to the outer end of the driving shaft 13 and driven from any suitable source of power, as from a high-speed motor.

16 ndicates a ratchetwheel, which is keyed, or otherwise secured, to the shaft 13.

17 indicates a pinion, which is loosely mounted on the shaft 13.

18 indicates a drum, which is secured in any suitable manner to the hub of the pinion 17 so as to rotate therewith.

19 indicates pawls, which are carried von the outer surface of the drum 18 and are adapted to be engaged by the teeth ofthe ratchet-wheel 16 when it rotates in the direction indicated by an arrow in Fig. 3.

20 indicates a car, which is keyed, or otherwise secured, o a shaft 21 and adapted to mesh with and be engaged by the pinion 17. The shaft 21 is journaled in eccentrics 22-23, which are journaled in suitable bearings 21-25 on the bed-plate 8. The eccentr1cs2223 are provided, respectively, with arms 2627, preferably integral therewith, and so placed upon the eccentrics 2223 that when the shaft 21 is in position the arms come respectively between the bearings 24: and bearings 25. It will be obvious that when the arms 26-27 are rocked in the manner hereinafter described the eccentricsv 22-23 will be rotated andsthe shaft 21 thereby will be moved slightly toward and away from the shaft 13. p

28 indicates a friction ulley, which is keyed, or otherwise secured? to the shaft 21 and is preferably provided with a number -of circumferential ridges 29 which engage circumferential rid es 30 on a clutch-drum 31 which is keye or otherwise rigidly mounted, upon the hub 32 of a driving pin":

ion 33,the hub 32 being loosely mounted on the shaft 13. The clutch-drum 31 is provided with a clutch-flange 34 whose inner iurface is beveled to form one clutch mem- 35 indicates a clutch-member, which is together they may engage one another tightly. The hub of the clutch-member 35 is provided with a circumferential groove 36. 37 indicates a shifting lever, which is pivotally mounted on the framework, and one end of which is provided with a fork 38 which embraces the hub of the clutch-member 35 and is provided with rollers 39 which en age the peripheral groove 36. The other en of the shifting lever is provided with a fork 40 which straddles a shifting-bar 41 slidingly mounted in suitable supports, as 42, on the base of the machine.

43-44 indicate collars, which are pinned,

ver 27.

It will be obvious that by the shifting of i the rod 41 in the manner hereinafter described, the shifting lever 37 may be moved so as to slide the clutch-member 35 on the shaft 13 and move it into or out of engagement with the clutch-drum 31.' If'the clutch members 35 and 31 are not in engagement with each other and the shaft 21 is shifted so as to bring the friction pulley into tight engagement with' the clutch-drum 31, shaft 13 on being'rotated in the direction shown by arrows in Fig. 2 will carry around with it the ratchet 16 whose ratchet teeth engaging the pawls 19 will drive the drum 18, dI'lVlDg the pinion 17, the larger gear 20 and the shaft 21. The forced frictional engagement between the friction pulley 28 on the shaft 21 and the clutch-drum 31 will cause the clutch-drum 31 to rotate carrying slower than the speed of the shaft 13, which relative amount of speed will be determined by the difference between the pinion 17 and 45 the gear 20 and the difference in diameters between the friction pulley 28 and the clutch drum 31, The driving P1111011 33 being thus driven, the motion is communicated to the press by means of gearing 47-4849 50-51, shown indotted lines on Fig. 2, in which 4748 represent intermediate gears and 4950-51 sundry of the gears of the press. On the other hand, if the shaft'21 is moved outward from the shaft 13 by the rocking of the arm 26 above described so as to move it slightly but suificiently to free the friction ulley 28 and clutch-drum 31 from frictiona engagement with each other, and if the clutch-member 35 'is slid into en agement with the clutch-flange 34, the shaft 13, driving the clutch-member 35, will drive the clutch-member 31 and conse uently the pinion 33 at the same speed as t e shaft 13 and in the same direction driving the press at high speed. The shifting of the parts is accomplished' by the mechanism hereinafter described, a greater part of which, however, forms. no part by itself of my present invention. t

52 indicates a rock-shaft, which is journaled in suitable hearings in the frame bars 9-10.

54 indicates a lever, which is loosely mounted on the rock-shaft 52 near its outer end and is provided at its upper end with the usual latch 55 which engages a suitable number of notches in a rack-bar 56. As shown,

for high speed and marked H, a notch for slow speed marked S anda notch at which the drive is thrown out and the brake thrown on marked 0.

57 indicates a disk, which is keyed, or otherwise secured, upon the outer end of the shaft 52 which is outside of and adjacent to the surface of the lever 54. This disk 57 is provided with two sets of ratchet-teeth 58 and 59 upon opposite portions of its periphery. 7

60 indicates a rock pin, which is journaled in the lever 54 and carries upon one side of the lever a dog 61 which is adapted to engage with he ratchet-teeth 58 and upon the other side of the lever an arm 62 projecting outward from the rock-shaft in a direction opposite to that of the dog 61.

63 indicates a pin mounted in the framebar 10, which is adapted as the lever is rocked into fast osition to engage the arm 62 and lift the dog 61 out of the ratchetteeth 58, as best shown in Fig. 6.

64 indicates a pawl, which is mounted upon the lower arm of the lever 54 below the disk 57 and is adapted to engage the ratchetteeth 59, as hereinafter described.

65 indicates a cam, which is secured upon the lower arm of the lever 54 and which is adapted as the upper part of the lever swings to the left to engage and swing out from its normally vertical position a swlnging arm 66 which is pivotall connected at its upper end with and depen s downward from suitable lugs 67 secured to the under side of the side frame-bar 10. The arm 66 is provided with a latch 68. I

69 indicates a collar, which is securedto the rock-shaft 52 and which carries a prothese notches are three in number, a notch jecting arm'70 which, when the arm 70 is swung up by the rocking of the rock-shaft 52 into slow-s eed position, as hereinafter described, is ad slpted to be enga edand to be held against backward rotation y the swinging under it of the latch 68 on the swinging arm 66 when the same freed from the cam 65 swings into normal vertical position.

- 71 indicates a collar, which is secured to the rock-shaft 52 and is provided with an upward-projecting arm 72. I

73 indicates a rod, which is pivotally connected at one end to the upper end of the' tional engagement with the clutch 31 or to sliding of the rod 73 longitudinally of itself.

therein.

7 5 indicates a collar, which is fixed upon the rod 73. 1

76 indicates a spiral spring, which, hearing against the lug 74 and collar 75, tends to force the rod 73 to the right in Fig. 4 and to rock in a clockwise direction the collar 71 and therefore the rock-shaft 52 when allowed freedom of action, as hereinafter described.

77 indicates a collar, which is secured to the end of the rock-shaft 52 opposite the lever 54 and carries an arm 78 preferably integral therewith. I

79 indicates a rock-shaft, which is journaled in suitable bearings, as '80, in the bedplate 8', and is provided at one end below the collar 7 7 with an arm 81 suitably secured thereto.

82 indicates a link, which is pivotally connected at one end with the arm 78 on-the collar 77 and at the other end to the end of the arm 81 on the rock-shaft 79 whereby,

when the rock-shaft 52 is rocked in one direction or the other, the rock-shaft 79 will be correspondingly rocked. f 3

83 indicates an arm,.which is suitably secured to the other end of the rock-shaft 79 and is connected by a link 84 with the arm 26. Another arm on the rock-shaft 79 and at its other end, (like the arm 83, but not shown, it being behind the other parts on the drawings), is simply connected by a link 85 to the arm 27 onthe collar 23.

Itwill be obvious from the above that when the rock-shaft 52 is rocked the rock- 'shaft 79 will be correspondingly rocked and the shaft 13 a slight distance but suflicient to bring the friction pulley into tight fricmove it out of such frictional engagement.

This motion should not be suflicient to en-- tirel-y free the gear 20 from the pinion 17, it being preferable that 'said gears should remain in engagement in order to facilitate case and sureness of operation in the manner hereinafter described. I

86 indicates a collar keyed, or'otherwise secured, to the shaft 52 and provided with an arm 87 which carries a pawl 88.

89 indicates a collar, which is loosely mounted upon the rock-shaft 52 adjacent to the collar 86 a'ndis provided upon its upper surface with 9. lug 90 adapted to be engaged by the pawl 88, so that when the rock-shaft 52 is rotated clockwise, as hereinafter described, the pawl 88 may at a. suitable time engage the lug 90 and rock the collar 89 in the same direction. The collar 89 is provided also with an arm' 91, preferably integral therewith.

' 92 indicates a rod, which is pivotally connected at one end with the arm 91 and at crossbar 9, is interposed aspiral sprin 94 which tends to normally rock the collar 89 ina contra-cloclnvise direction and yieldingly maintain it in the position shown in the figures, especially Fig. '2.

95 indicates a link, which is 'pivotally connee-ted atits upper end with the arm 91.

and at its lower end with an arm 96 secured to one end of a rock-shaft 97 which is tion or the other with the rocking ofthe collar 89 on the shaft 52.

98 indicates an arm secured to and depending downward from the rock-shaft 9T opposite the ,flange 34 "of the clutch-member 31.

99 indicates a flexible brake-band, one end of which is adjustably secured in the arm 98 and the other end is secured in the collar 100 on which the arm 98 is carried.

by the arm 98, as hereinafter described.

102 indicates a link, one end of which is pivotally connected with the lower end of the lever arm 54 and the other end with the lower end of a swinging lever 103 which is journaled in suitable hearings in hangers 104 which aresecured to and depend downward from the side frame-bar 10. The upper arm of the lever 103 carries a beveled rack-segment 105 which meshes with a beveled gear 106 secured near the upper end of a shaft 107 journaled in the hangers 104.

108 indicates a collar, which is secured to the lower end of the shaft 107 and carries an .arm 109 preferably formed integral therewith.

pivotally connected with the arm 109 and -the other end with one end of the shift-bar 41. When the lever 54 isrocked, the beveled the other in ltSbeMiHgS-i longitudinall' of itself in one direction or...

The 0 eration 'ofthe device is as follows: i

In' the rawin high-speed p0s1tion,t hat isx't'osay with {beg-1 30 l s the parts are shown inthe of the beveled rack-segment 105 with the beveled gear 106 will rock the shaft 107, pull the link 110 in a direction toward the upper portion of the drawing in Fig. 1, pulling the shift-bar 41 in the same direction, and

by the bringing of the collar 43 into con-\ tact with the end of the shifting lever 37 will slide the clutch-member 35 out of engagement with the clutch-member 31. As

' this movement to the right continues, the

movement of the lever continues.

arm 62 on the rock-pin 60 is freed from en-- gagement with the pin 63, allowing the dog 61 to drop upon the periphery of the disk 57, passing over the ratchet-teeth 58 as the Tiis same movement of the lever swings the cam 65 out of engagement with the swinging arm 66, allowin it to drop free from engagementwith t e cam but not falling under the arm 70 until that is lifted so as to permit its enga ement, as hereinafter described. As the lever 54 nears the oflI-fnotch O- the pawl 64 engages one of the ratchetteeth 59 and turning the wheel 5'7-. .rocks the shaft 52 in a clockwise direction. Just be- I fore the lever reaches the off notch the pawl 88 on the arm 87 on the collar 86-whi.ch collar -is being rotated clockwise by the rocking of the shaft 52en ages thelug 90 on the collar .89 and roc s it clockwise against the action of the spring 94. This moving the arm 89 also in a clockwise direction moves the link 95 from left to right in Figs. 1 and 2 and rocking the shaft- 97 tightens the flexible brake-band upon the brake and binds the same to the flange 34 of the clutch-drum 31, breaking the press and bringing it to a stop.

When it is desired to start the press, the hand-lever 54 is moved to the left. This causes the engagement of the dog 61 with one of the ratchet-teeth 58 on the disk 57,

tion.

toward the shaft 13, bringing the friction pulley 28 into tight engagement with the clutch-drum 31 causing its rotation and the consequent rotation of the inion 33 at slow speed, as above described. his same motion of the rock-shaft 52 has lifted the lug -70 on the swinging arm 66which up to. this point is free from the cam to dro under the arm 70 and thus hold the roc -shaft, which has been rocked against the action of the spring 76, against return movement until free to move, as hereinafter described. The swinging of the lever 54 in this direction has also through the arm 103 and beveled rack-segment 105'rotated the ear 106, the shaft 107 and-moved the shi t-bar 41 until the collar 45 has been brought into contact with the end of the shifting-lever 37 ready to move the shifting-lever upon further movement of the lever 54 to bring thu clutch-members into engagement. The lever 54 has not yet been brought into position to cause the in 63 to en age the arm 62 and rock the og 61 outo? engagement with the ratchet-teeth 58. This same rocking of the shaft 52 has, of course, rocked the collar 86 in the same. direction and freed the lug 90 on the collar 89, from the pawl 88.

thereupon immediately rocks the collar89 contra-clockwise, releasing the brake from the clutch-member as soon as the movement of the lever in this direction has started. The lever therefore being in the slow-speed position, the brake is off, the clutch-members 31 {and 35 not yet brought into engagement and the press is running at slow speed. It being desired to thereupon drive the press at high speed, the lever 54'is moved toward the high-speed position. The first movement of the lever in this direction shifts the shiftbar 41 soas to throw the shifting-lever 37 and bring the clutch members 31 and 35 into engagement with one another, which engagement, it will be obvious, will be radual and not sudden on account of the eveled bearing surfaces above described,a further yielding being permitted by a spring 46.

gins be ore the disengagement of the fricing up the more rapid movement will, of course, cause a momentar highly accelerated speed of the shaft 21an therefore, through the gears 20 and 17, cause'a corresponding acceleration of the drum 18,this movement,however, being permitted by the slippin 4 of the pawls over the ratchet-wheel 16. It ollows that the low-speed mechanism is not disengaged until after the high speed "toward the higher speed, preventing as has been. said above, the lapse of a moment oftime during which the press would be running by its own momentum. As the higher speed begins to taken up, the 'pin on the collar 69, permitting the latch 68 This en agement of the clutch-members be tion-pulley 28, and the clutch-drum 31tak begins to engage and the press begins to run This leaves the spring 94 free to act, which 63 engages the arm 62 and lifts the pawl 61 out of engagement with the teeth 58. At about the same time the cam 65 is brought into engagement with the swinging arm 66, swinging it to one side and freeing the latch 68, leaving the rock-shaft 52 free from engagement both of the pawl 61 with the disk 57 and of the latch 68 with the arm 70. The

7 spring 76 thereupon left free to .act immediately rocks the arm 72 and rocking the rock-shaft 52 clockwise brings the parts into the position shown in the several figures. This rocking of the rock-shaft by the spring '76 by the operation of the arm 7 8, link 82,

and arms 81 rocks the rock-shaft 79, rocking, as has been abovedescribed but in the opposite direction, the eccentric collars 22 on the shaft 21 and moving the said shaft away from the shaft 13 sufiicient to free the friction wheel 28 from frictional engagement with the clutch-member 31, allowing the parts which have been momentarily accelerated to slow down to normal speed. The further movement of the lever to the fullspeed position forces the clutch-members 31 driving-shaft, a driving-pinionconnected to said clutch-member, a sec ndsclutch-member slidingly mounted on said drivingshaft, and means for moving said clutch-members into and out of engagement, of a pinion rotatably mounted on said driving-shaft, means for rotating said pinion in one direction from said--driving-shaft, a countershaft, a gear on said counter-shaft of larger size than said 'pinioii'and meshing therewith, a friction device on said counter-shaft adapted to frictionally engage the periphery of said first clutch-member, and means for shifting said counter-shaft toward and from said drivin -shaft and causing frictional engagement etween said counter-shaft and said first clutch-member.

2. The combination with a driving-shaft, a gear rotatably mounted 011 said drivingshaft, a clutch -member fixedly connected with said gear, and a second clutch-member slidingly mounted on said driving-shaft and adapted to be brought into engagement with said loose clutch-member and drive the same, of a 1pinion rotatably mounted on said driving-s aft, pawl and ratchet connections between said driving-shaft and said inion, a counter-shaft adapted to be move toward and away from said driving-shaft, a large gear on said counter-shaft meshing with said pinion, a friction member on said counter-shaft adapted when said counter-shaft is moved toward said driving-shaft to frictionally engage said loose clutch-member, means for moving said clutch-members into and slidingly mounted on said driving-shaft and adapted to be brought into engagement with said loose clutch-member and drive the same,

of a pinion rotatably mounted on said driving shaft, pawl and ratchet connections between said driving-shaft and said pinion, a counter-shaft adapted to be moved toward and away from said driving-shaft, a large gear on said counter-shaftmeshing with said pinion, a friction member on said countershaft adapted when said counter-shaft is moved toward-said driving-shaft to frictionally engage said loose clutch-member, a clutch shifting device for moving said clutch-member into and out of engagement, a hand-lever, connections between said handlever and said clutch shifting device, means operated by said lever for shifting said counter-shaft toward and away from said driving-shaft, said lever and its connecting devices being adapted when said lever is moved in one direction to first move said counter-shaft toward said driving-shaft and bring said friction device into friction engagement with said loose clutch-member, then, as said lever is moved farther in the same direction, to operate said clutch-moving means to cause engagement of said clutch members and, as said clutch-members are brought into engagement to shift said counter-shaft away from said drivin -shaft.

4. The combination with a driving-shaft, a gear rotatably mounted on said drivingshaft, a clutch-member fixedly connected with said gear, and a second clutch-member slidingly mounted on said driving-shaft and adapted to be brought into engagement with said loose clutch-member and drive the same, of a pinion rotatably mounted on said driving-s aft, pawl and ratchet connections between said driving-shaft and said inion, a counter-shaft adapted to be moved toward and away from said driving-shaft, a large gear on said counter-shaft meshing with said pinion, a friction member on said countershaft adapted when said counter-shaft is moved toward said drivin -shaft to frictionally engage said loose clutc -member, a clutch shifting device for moving said clutch members into and out of engagement, a brake, a hand-lever, connectionsbetween said hand lever and said clutch-shiftin device, means operated by said lever for shi ting said counfer-shaft toward and away from said driving-shaft, said lever and its connections bethe opposite direction to move said clutchmembers out of engagement.

5. The combination with a driving-shaft, a gear rotatably mounted on said drivingshaft, aclutch-member fixedly connected with said gear, and a second clutch-member slidingly mounted on said driving-shaft and adapted to be brought into engagement with said loose clutch-member and drive the same, of a pinion rotatably mounted on said driving shaft, pawl and ratchet connections between said drivin'g-shaft and said pinion, a counter-shaft adapted to be moved toward and awayfrom said driving-shaft, a large gear on said-counter-shaft meshing with said pinion, a friction member on said counter-shaft adapted when said counter-shaft is moved toward said driving-shaft to frictionally engage said loose clutch-member, a clutch shifter for moving said clutch-members into and out of engagement, a brake adapted to be applied to said loose clutchmember, a hand-lever, connections between said hand-lever and said clutch-shifter, connections operated by said lever for shifting said counter-shaft toward and away from said driving-shaft, and connections between said lever and said counter-shaft and between said lever and said brake, said lever and its connections being adapted when said lever is moved in one direction to first move said counter-shaft toward said drivin -shaft and bring said friction device into friction engagement with said loose clutch-member, then, as said lever is moved farther in the same direction, to operate said clutch-moving means to throw said clutch members into engagement, and, as said clutch-members are brought into engagement, to shift said counter-shaft away from said driving-shaft, said connections being also adapted, as said lever is swung in the opposite direction, to move said clutch-members out of engagement, and, as'said lever is moved to the limit of its motion in the backward direction, to clamp said brake upon said loose clutch-member.

HANS o. SCHROEDER.

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