US2628503A - Mechanism for producing simultaneous oscillating and rotary motion - Google Patents

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Feb. 17, 1953 w. MESSINGER MECHANISM FOR PRODUCING SIMULTANEOU OSCILLATING AND ROTARY MOTION 4 Sheets-Sheet l Filed NOV. 6, 1950 G uw u In... l

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R WILLIAM MESSI GER BY @zh/4 RNEYs Feb. 17, 1953 y w, MESSINGER 2,628,503

MECHANISM FOR PRODUCING SIMULTANEOUS f OSCILLATING AND ROTARY MOTION Filed Nov. 6, 1950 4 Sheets-Sheet 2 INVENTOR WILLIAM MESSINGER BY M VZW ral j/5 A ORNEYS Feb. 17, 1953 W. MESSINGER MECHANISM FOR PRODUCING SIMULTANEOUS Filed Nov. 6. 1950 guuuun E OSCILLATING AND ROTARY MOTION 4 Sheets-Sheet 5 l WILLIAM 67 3"" Fles.

NVENTOR MES S l NGE R ATTORNEYS W. MESSINGER MECHANISM FOR PRODUCING SIMULTANEOUS Feb. 17, 1953 2,628,503

' -oscILLATING AND ROTARY MOTION 4 Sheets-Sheet 4 Filed Nov. 6. 1950 mvENToR WILLIAM MESSINGER Y BY A oRN S Patented Feb. 17, ,Y 1953 MECHANISM FOR PRODUCING SIMULTANE- OUS OSCILLATING AND ROTARY MOTION William Messinger, Philadelphia, Pa. Application November 6, 1950, Serial No. 194,344

(Cl. i4- 22) 9 Claims. 1

The present invention relates to mechanism for producing simultaneous rotation and axial movement of a driven member and embodies more speciiically an improved mechanism by means of which axial movement may be imparted effectively to a driven member while it is being driven.

More particularly, the invention relates to mechanism for driving a -roll and, at the same time, imparting to such roll oscillating movement in directions -parallel to the axis of the roll.

Numerous examples exist of mechanism wherein a member is to be rotated and also adjusted axially, typical illustrations of such mechanism being in the paper manufacturing industry Iand in the materials reduction art, and it is an object of the present invention to provide mechanism by means of which a rotating element may be moved axially while it is being rotated.

In order that the invention may be more readily understood, reference will now be had to the accompanying'drawings, wherein Figure 1 is a longitudinal sectional view, taken through the axis of a device constructed in accordance with the present invention;

Figure 2 is a view in end elevation, taken from the right of Figure 1, and showing the mechanism by means of which the axial oscillation of the rotating element is accomplished;

Figure 3 is an exploded view showing the compound bearing illustrated at the right-hand end of Figure 1;

Figure 4 is a perspective view in section illustrating a bearing included in the drive elements at the left-hand end of Figure 1;

Figure 5 is an enlarged view illustrating a slightly modified version of the structure shown in Figure 1;

Figure 6 is a view similar to Fig. 5, showing a further modied version of the drive mechanism for the roll;

Figure '7 is an enlarged view of a slightly modified form of oscillating mechanism similar to that illustrated at the right-hand end of Fig. 1; and

Figure 8 is a View similar to Figure 1 showing a modified form of the invention.

Referring particularly to Figures 1 to 4, inclusive, the rotatable element is illustrated as a roll Ill mounted within side frame members II and I2. The left-hand end of the roll is journaled in a. bearing I3 which is shown as a -ball bearing having a -plurality of axially spaced courses of balls. The roll I0 is provided with an axial shaft I4 having journal shaft extensions I5 and I6, the journal shaft I5 being journaled in the bearing I3, While the shaft I6 is journaled in a compound bearing indicated generallyV at II.

Rotation of the roll is accomplished by 'means of a drive motor indicated Vgenerally at I8, which includes a motor frame I6 secured to an adapter 29 that is mounted upon a housing extension 2|, secured to the frame member I I. The armature shaft 22 of the motor I8 is journaled in a bearing 23 at the left-hand extremity thereof and at the right-hand extremity in a bearing 24 that is received within a cylindrical extension 25 carried by a planet pinion spider 26. The cylindrical spider extension 25 is journaled in a bearing 21 that is carried by the adapter 20, and the righthand extremity of the armature shaft 22 drives a sun gear 28 which engages a `plurality of planet pinions 29 journaled in the planet spider 26. Outer xed ring gear 30 is carried vby the housing extension 2l, and the planet spider 26 has secured thereto a cylindrical sleeve 3I formed with an enlarged collar 32. This enlarged collaris illustrated in detail in Figure 4, and it seenv that it is formed with a plurali-ty of'longitudinally extending ball ducts 33 and ball grooves 34. A plurality of bearing balls 35 are received within the ducts andgrooves, and end caps36 are formed with curved ball ducts 3'I`and are secured upon opposite faces of the collar `32l to complete the endless track within which the balls 35 move. The extremity of the journals-haftv I5 has secured thereto a sleeve 38 within which 1ongitudinally formed grooves 39 are provided.v lThe balls 35 engage the grooves 39 and the latter thus receive the torque delivered from the collar 32 through t-he balls 35 that are in engagement with the grooves 3'9. In this fashion, the rol1 I0 .is driven rotatably by the motor I8. Y'

In order that the roll I0 may be oscillated in ydirections parallel to its axis, the journal shaft I6 is provided with the compound bearing I'I that is illustrated in Figures 1 and, 3. This lbearing is formed of an inner race 40 having a ball groove 4I within which bearing balls 42 are received. Thebearing balls are retained in position by a retainer ring formed of ring sections 43 and 4,4, and the balls engage a groove 45 of a middle race 46. Th-e middle race is formed with a sleeve extension 41 and, on its outer surface is provided with a plurality of spirally extending grooves 48 within which a plurality of courses of ball-s '49 and 50 are received. A compound retainer ring formed of sections 5I, 52, and 53 'serve to retain the course of balls 49 and 50 in the grooves 48, and these courses of balls are received within complementary spiral grooves 54 formed in an outer race 55. 'I'he outer race 55 is secured in the supporting frame structure I2.

As illustrated in Figure 2, the sleeve extension 41 is provided with an arm 56 to which is connected a connecting rod 51, the other end of which is mounted over an eccentric 5.8, which is secured to the armature shaft-59 of an electric motor 60, mounted upon the frame member I2. When the motor 68 is driven, the eccentric 58 causes rotary oscillationof the. sleeve 41 and middle race 56 caused by movement of arm A55 back and forth in a direction transverse to the axis of the roll I0. Such oscillation causesthe middle race 46 to be oscillated in a direction. axially of the roll I9 because of the structure of the outer bearing formed by the balls 49and 50, and the spiral groves 48 and 54. Inasmuch as thefballs 42 operate as elements of a thrust as well las radial bearing, the axial movement or oscillations-of. the middle race 46 -is Yimparted to the roll I8.

Referring to the structure shown in Figure 5, ,the drive motor Iisdesigned to drive the motor directly ratherthan through a planetary gear mechanism as. Aillustrated in Figure 1. A supporting wall EI carries .a bearing 62 in which the right-hand end ofthe armature shaft is .j.ournaled, .and the drive is transmitted to the journal .shaft I5 through the bearing structure illustrated in Figure 4, .as previously described. Inthe form shown inFigure 5, the journal shaft I5 isjournaledin theffralne structure I2 by means -of aroller bearing .53 ratherl than the ball bearing L3..

In the form vshown in Figure -6, the drive is vtransmitted through an intermediate .drive element comprising a body member 64 journaled at 65 in asupporting wall 55'. The armature shaftBT is provided with a splined drivinghead 66 which engagescooperating splines in the body member 64.. "The collar 32 is carried by a cupshaped element 82' that is secured to the body member 6'4..

Figure? is an enlarged view of a slightly modified form of compound bearing similar to that shown at the right-hand end of Figure 1. The journal shaft IE is provided with radial bearings B8. and 69 and athrust. bearing 18. The thrust bearing 10 includes an inwardly extending flange 1I lformed on the sleeve extension yIVI of the middle race. In other respects, the compound bearing 'is similar to that illustrated in Figure 1.

VIn Figure 8, a modified version of the invention Sis illustrated in which itis shown as being embodiedV in a materials reduction mechanism. A, stationary frame member 12 is provided with a chamber 13 from'which material is fed through a discharge opening 14' in order that it may move outwardly over an .abrading plate 15. After the reduction of the particle size of the material is accomplished, it falls into a discharge outlet 16 formed at the bottom of a grinding chamber formed by a housing 11. The housing 11 is 'mounted upon aV platform 18 carrying standards 19 and 80, which are provided with bearings 8| and 82.. A driving sleeve 83 is journaled in the 4 with a Wear plate 88 that is adapted to cooperate with the stationary plate 15. 'I'he shaft 8S is journaled in a compound bearing 89 similar to the compound bearing illustrated in Figure '1.

The sleeve extension 41 of this bearing is provided with a ring gear 90 that is driven by a gear 9| mounted upon a shaft 92. The gear 9| is driven by the driving pinion 93 secured to a 'shaft4 94 that is drivenI by a worm and Worm gear .connection 9.5 from any electric motor 95.

81, but also 'of means for moving the plate to any desired extent toward or away from the cooperating stationary plate 15. In this fashion, a fine adjustment of the space between the friction surfaces of the cooperating plates 15 and 18 is provided.

While the invention has been described with specific reference. to the accompanying drawings,

.it is not to be limited save as dened in the appended claims.

I claim:

1. A device for converting rotation into'translation comprising a shaft, a sleeve surrounding the shaft, a thrust bearing between the sleeve andthe shaft preventing relative axial movement and allowingrelative rotational movement therebetween, a rst grooved race on the sleeve and a second grooved race mounted on a. supporting structure., at least the race on the sleeve being formed with a plurality of spiral grooves spaced around the race, at least one ball in each groove coupling the races together, and means for rotating the sleeve relative to the supporting structure.

2. A device according to claim 1 wherein a plurality of the balls coupling the races lie in a common plane perpendicular to the axis of. the shaft.

3. A device according to claim 1 wherein a plurality of 'balls li'e in each spiral groove and each groove intersects a number of oppositelythreaded grooves on the second race equal tothe number of balls in each groove.

4. A device according to claim 1 wherein the means. for rotating the .sleeve is an arm on the sleeve perpendicular to the axis uthereof, and means for oscillating the arm to reciprocate the shaft.

5. A device according to claim 1 further provided with'means for rotating the shaft independently of axial movement thereof.

6. A device for converting a rotation into a translation comprising a shaft, a sleeve surrounding the shaft and coupled for axial movement therewith, means for mounting the sleeve in a supporting structure, oppositely-threaded cooperating spiral grooves on the sleeve and the supporting structure, balls` in fthe grooves. coupling the sleeve to the supporting structure whereby to move the sleeve axially upon turning the sleeve in the supporting structure.

7. A device according to claim 6 provided with bearings to journal the shaft for rotation with provision for axial movement thereof, and one of the bearings is retained in the sleeve and is axially movable therewith.

8. A device according to claim 6 wherein the cooperating spiral grooves comprise a plurality of grooves around the periphery of the sleeve and a like number of oppositely-threaded grooves on the supporting structure facing the grooves of the sleeve, at least one ball in each groove coupling the sleeve and supporting structure together, and

there is provided a thrust bearing between the sleeve and the shaft preventing relative axial movement and allowing relative rotational movement therebetween, and means for rotating the sleeve relative to the supporting structure.

9. Rotating and reciprocating mechanism oomprising a rotatable member, a shaft upon which the member is mounted, a bearing for the shaft including an inner race carried by the shaft, a middle race, bearing elements between the inner and middle races, an outer race carried by a supporting structure, oppositely-threaded cooperat- `6 ing spiral grooves on the outer and middle races, balls in the grooves coupling the outer and middle races, and means to turn the middle race on its axis.

WlZLLIAM MESSINGER.

REFERENCES 'CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 675,044 Locke June 11, 1901 851,728 Bayrer Apr. 30, 1907 1,862,850 Fritschi June 14, 1932 2,144,447 Barnhart Jan. 17, 1939 2,227,697 Blood Jan. 7, 1941

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