US1225309A - Clutch for roll-driving mechanism. - Google Patents

Description

D. R. BOWEN. CLUTCH FOR ROLL DRIVING MECHANISM.

APPLICATION FILED JUNE 16. 1908.

Patented May 8, 1917.

2 SHEETS-SHEET 1 imam D. R.-BOWEN.

' CLUTCH FOR ROLL DRIVING MECHANISM. I

APPLICATION FILED JUNE 16. 1908.

1,2%5,39o Patented May 8,1917.

2 SHEETS-SHEET Z. 7%

fiwarzibrw DAVID B. BOWEN, 0F ANSONIA, CONNEC UNI a ran srans PATNT @FFEIQE.

TICUT, ASSIGN'OR T0 FARREL FCUNDBY &

MACHINE COMPANY, OF ANSONIA, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CLUTCH FOR ROLL-DRIVING MECHANISM.

naaaaoa.

' Application filed .Tune 16 To all wkom is may Concern:

Be it known that I, DAVID R. BOWEN, a

citizen of the United States, residing at An- This-invention relates to certain improvements in driving mechanism.

In driving the rolls of mil1s,.such, for instance, as rubber grinders, and other similar machines, it has been customary to mount a large gear on the shaft of one of the rolls and make this gear fast to the shaft, the,

shaft at its other end being intergeared with theshaft of the other roll. This large gear was in turn driven by a relatively small. pinion which was arranged to be clutched to and unclutched from its driving shaft by a positively acting lever operated clutch. In constructions of this character, great strains were set up on the driving mechanism in starting the mill, particularly when the mill was stopped with a mass of material between the rolls. Further, the positive clutch mechanism 'for the small pinion was I located on the end of the shaft beyond the pinion, and the frame had to be constructed to provide a support therefor, thus extend ing the overall dimensions of the machine. Further, also, the prior machines were not provided with any adequate emergency stop mechanism. In such machines, and particularly in rubber-grinders, it is necessary at times and while the machine is running for the attendant to remove foreign bodies from the mass about to pass between the rolls. In doing this, the hand of the attendant is liable to be caught between the rolls, and unless the machine can be immediately stopped, there is danger of severe injury.

It is the object of this invention to provide an improved driving mechanism for the rolls of millsand similar machines in I which the machine may be readily stopped Specification of Letters Patent.

Patented May 8, rent.

, 1908. Serial No. 438,701.

and started, the severe strains set up in starting and stopping the machine being minimized. i

A further object of the invention is to produce an improved driving mechanism for machines of the character referred to of such a character that the over-all dimensions of the machine may be decreased.

A further object of the invention is to produce an improved driving mechanism for machines of the character referred to, said mechanism including devices by which the machine may be instantaneously stopped.

With these and other objects in view, the invention consists in certain constructions,

binations as will be hereinafter fully described and then specifically pointed out in the claims. j

Referring to the drawingsproved driving mechanism, shown as applied to a rubber grinding mill.

Fig. 2 is a side view of the driving mechanism of the machine, certain parts being shown in section, the position of the ob.- server being indicated by the arrow 2 in Fig. 1.

Fig. 3 is adetail section.

" :oonstruction shown in Fig. 3.

'Fig. 5 is a section on the line 5-5 of the construction shown in Fig. 4.

Fig. 6 is a detail view. I Referring to the drawings, the machine which has been selected to illustrate the in 'vention is, in its general features, a rubber grinding machine of the ordinary type, one of the rolls of this machine being indicated, at 1, and the other being indicated by dotted lines 2 in Fig. 1. These rolls may be mounted in suitable bearing boxes, as is usual, the box for the roll 1 being marked 3 and the box for the roll 2 being indicated at 4, in Fig. 1, this box being made adjustable by a screw, as is usual in such constructions. In the particular machine illustrated, the roll or shaft 1 is provided with and in certain parts, improvements and com- Fig. 4 is a section on the line 4-4 of the Figure 1 is an end elevation of the ima journal 6 which extends through the box 3, and beyond this journal the endof the roll or shaft 1 is again reduced, as indicated at 7. The shaft driver which, as illustrated, consists of a relatively large driving gear 8, is mounted on the reduced part 7. This driving gear 8 is mounted to rotate loosely on the end of the roll 1, a clutch being provided to secure the driver to the roll or shaft 1 and to disconnect it therefrom, as circumstances require. The driver is in turn operated by a pinion 5 fast on the power shaft 5 of the machine. In the best 1 constructions, the driver 8 will be provided with a recessed hub 9 and the parts will be so arranged that the recess in the hub is located on the outside of the driver.

While the construction of the clutch employed may be varied, in the best constructions, it will be of such a character as to allow a slip of the shaft with respect to the clutch as the clutch is actuated. In the particular construction illustrated, the part 7 of the roll or shaft 1 is provided with a clutch drum 10, this clutch drum being suitably secured by a key, or in any other suitable manner. The drum is surrounded by a coil clutch member 11, the construction being such that the convolutions of this member may be operated to grip or release the clutch drum.

While the arrangement of the clutch members with respect to the driver may be varied, in the best constructions these parts of the clutch will be arranged on the outside of the driver and will extend into a recess in the hub of the driver, this arrangement making for compactness of the mechanism. While, furthermore, the means for connecting the coil member of the clutch, when this form of clutch is employed, to the driver may be varied, in the best constructions, and as shown, one endof the spring member is provided with a projection 12 which extends into a suitable recess 13 in the hub of the driver, a wedge 14 being employed, if desired, to hold this projection in the recess, thus making fitting unnecessary.

The clutch actuating devices may be varied in construction, but, as shown, the hub of the driver is formed to provide a seat for a sliding collar 15. This collar is surrounded by a split ring 16 from which extend two pins 17. These pins pass through the ends of arms 18 mounted on a rockshaft 19 supported in suitable bearings in brackets 20 on the frame of the machine. The collar 15 is provided with two arnis 21, 22, the armv2l carrying a guide pin 23, and the arm 22 carrying a clutch operating pin 24;. This clutch operating pin 24 is pivoted at 25 to one of the arms 26 of a bell- crank lever 26, 27, pivoted at 28 to a bracket 29 secured to the hub 9 of the driver. The arm 27 of the bell-crank 26, 27 lies in a recess formed in an enlargement 30 on the free end of the coil member of the clutch. 4

With this constrnction, it will be apparent that as the shaft 19 is rocked the collar 15 will be caused to slide on the hub of the driver and the connecting pin 24 will operate the bell-crank 26 to cause the spring member of the clutch to grip or release the clutch drum 10, as the case may be, and thus connecting or disconnecting the driver from its shaft.

The means for rocking the shaft to o crate the clutch may be varied within wide limits. In the particular construction shown, this shaft is provided with an arm 31 which is acted upon by an operating member to effect the rocking of the shaft and the movement of the collar. The construction illustrated includes a threaded rod 32 supported in a bracket 33 mounted on the frame of the machine. This rod, in the particular construction shown, is arranged so that it may, under certain circumstances, slide through the bracket and is kept from turning in the bracket by a pin 34 engaging a groove 35 in the end of the rod. The end of the rod not supported by the bracket 33 extends through a slotted opening 36 in the arm 31 before referred to. The particular operating member illustrated consists of a threaded nut 37 mounted on the threaded rod 32, this nut being conveniently formed as-the hub on hand-wheel 38. Under ordinary circumstances, the rod 32 is kept from sliding through the opening in the bracket by means of an abutment 39. With this construction, it is apparent that as the hand wheel is rotated, in the proper direction, the nut 37 will be caused to engage the end of the lever 31 and push it over. This movement of the lever will rock the shaft 19, slide the collar and, through the bell-crank connections. before described, tighten the clutch coih gmthe'drum, so as to connect the driver to the shaft. When the hand wheel nut is rotated inthe opposite direction the nut'will travel away from the end of the lever 31, thus permitting, the coil 11 to free itself from the drum 10, this in turn causing the collar 15 to slide back. While the resiliency of the coil might be depended upon to produce this freeing movement of the coil and collar, in the particular construction illustrated, the pin 23 is provided with a spring 40 which assist'sin this action. The action so fardescribed is one which will take place during the ordinary operation of clutching or unclutching the driver from the shaft.

In the best constructions a release mechanism will be provided by which the driver may be instantaneously unclutched from the shaft, as, for instance, when an operator has caught his hand in the, rolls, or when some foreign body, as a bolt or stone, is observed in the mass about to pass between the rolls which body cannot be removed without stopping the machine. The particular construction of this release mechanism may be considerably varied, but it should, however, include an actuator so disposed with relation to the rolls that it may be conveniently, operated from all points along them. In the particular construction illustrated, the abutment 39 is utilized as a part of this actuator and to this end is mounted on an arm 41 pivoted at 42 to the bracket 33 before referred to. Connected to the arm 41 is a rod 43 extending along the rolls. The other end of this rod 43 may be supported by an arm 44 pivoted at 45 to a bracket 46 on the frame of the machine. The arms 41 may be extended, if desired, as shown, and counterweights 47 secured to the ends of the arms. sired to instantaneously stop the machine, the operator grasps the rod 43 and pulls it down. This moves the abutment out from behind the end of the rod 32 and permits it to slide bodily through the bracket which movement in turn permits the movement of the arm 31 and the shaft 19 as before described.

' therefore, as a fly wheel. When the machine is to be restarted, therefore, the momentum of this gear will assist materially in starting the rolls and the friction clutch will reduce the strains on the mechanism in starting. Further, by arranging the'clutch mechanism as shown and by recessing the hub so that the clutch mechanism extends into it an exceedingly compact mechanism is obtained and one in which the operating mechanism cannot only be rocked conveniently from any part of the machine but is arranged on-"the roll side of the driver, thus simplifying the character of the operating connections.

Further, when ity is desired to stop the machine, this can be efi'ected instantaneously by the clutch releasing mechanism which operates to disconnect the large gear from the roll shaft, so that there is no such tendency for the rolls to turn under the momentum of this gear acting as a fly wheel as there would be were this gear fast on its shaft and the driving pinion disconnected by a clutch mechanism which, as before pointed out, is the construction usually employed in machines of this character.

Changes and variations may be made in the construction by which the invention is carried into effect. The invention is not, therefore, to be limited to the specific construction herein described and illustrated in the drawings With this construction, if it is de-' rock-shaft, anactuating member forthe rock-shaft, means for giving the actuating member a gradual movement in two dlrections to rock the rock-shaft, thus throwing 1 the clutch into and out of operation, and

means for quickly releasing it to allow it" to move quickly in one direction to'rock the shaft to throw the clutch out.

2. The combination with a driving pinion,

of a driven shaft, a relatively large gear operating also as a fly wheel loosely mounted on the shaft and arranged to drive the shaft, 4 I

a slip clutch connection betweien' the gear clutch. 1

557'- and the shaft, and means for operating the 3. The combination with a driving pinion,

of a driven shaft, a relatively large gear operating also as a fly wheel mounted on theshaft and arranged to drive the shaft, a slip clutch connection between the gear and the shaft, means for operatingthe clutch to connect. it to and disconnect it from the shaft,

and anu'nstantaneous release mechanism for disconnecting the gear from the shaft.

The combination with a driven shaft, 7

of a relatively large gear operating also as a 'fiy wheel; on the shaftand arranged to drive the shaft, a coil clutch connection between the gear and the shaft, means for operating the clutch to connect the gear to j and disconnect it from the shaft, and a release mechanism including an actuator accessible from points along the shaft for instantaneously disconnecting the clutch from the shaft.

5. The combination with a driven shaft,

of a gear mounted on the shaft and arranged to drive said shaft, said gear having a recessed hub, a clutch lying on one side of the hub and extending into the recess and arranged to release the shaft, a sliding collar on the opposite side of the hub, connections between the collar and clutch extending through the gear, a lever for operating the collar, means including a screw and a hand operated nut for operating the lever, means for holding the screw against endwise movement, and an actuator arranged to re lease the said screw-holding means.

6. The combination with a driven shaft, of a gear having a recessed hub mounted on said shaft and arranged to drive said shaft, a clutch normally tending to open, said clutch lying on one side of the hub and extending into the recess, a sliding collar on the opposite side of the hub, connections between said collar and the clutch whereby tie are

the latter is operated by movements of the Cit collar, a lever for operating the collar, :1 my hand, in the presence of two subscribthreaded rod, a nut movable on the rod for ing witnesses. operating the lever, and means including a movable abutment whereby the rod and nut 5 are .bodily movable to permit a; movement of lVitnesses:

the lever. H. J. DEvnNPoRT,

In testimony whereof, I have hereunto set C. L. DODGE.

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

DAVID R. BOWEN.

Images