US1915495A - Surface treating machine - Google Patents

Description

June 27, 1933. A. EmKssoN-JoNs 1,915,495

SURFACE ,TREATING MACHINE Filed Oct. 15, 1931 s Shets-Sheet 1 I m /& WM

fins ATTORNEY June 2?, 1933.. A. ERlKSSON-JONS 1,915,495

SURFACE TREATI NG MACHINE filed Oct. 15, 1951 5 Sheets-Sheet 2 ATTORNEY June 27, 19330 A, ERmssoNuoNs I SURFACE TREATING MACHINE Filed Oct. 15, 1931 3 Sheets-Sheet 5 INVENTOR & ATT g RfiY Patented tine 27 i333 rarer area ANDEBS EEIKSSON-E'QNS, 9F STOCKHQLM, SWEDEN, ASSIGNOR T INVENTIA :EATENT- VERWERTUNGS-GESESCFT, 0F SCFHA'USEN, SWITZERLAND, A. CORPORA- TION 0F SWITZERLAND 1 SUBFACETREATING MACHINE Application filed Octcber is, 1931, Serial no.

invention relates to floor polishers and like machines for treating surfaces of various kinds. More particularly the invention relates to surface treating machines such as floor polishers having a plurality, and pref-' erably three, rotatable elements contacting the surface to be treated. Still more particularly my invention relates. to the means for translating power from the power source, inch as the electricmotor, to the driven memers.

The nature of my invention structurally and the advantage thereof will become apparent from a consideration of the following description taken in conjunction with the accompanying drawings forming a part of this specification and whereof: I

Fig. 1 is a side elevational view of a three- I disc floor polisher embodying the invention;

Fig. 2 is a front elevational view, partly in section, of the machine shown in Fig 1;

Fig. 3 is a schematic plan View of the driving and driven members of themachine.

shown in Figs. 1 and 2; a

Fig. 4 is in part a top plan view of the machine of Fig. 1 with the motor and easing removed and is, in part, taken on the line 'ing a motor 4-4 of Fig. 5;

Fig. 5 is a partial vertical section taken on the line 5-5 of Fig. i;

Fig. 6 is a bottom plan view of a modified structure and is taken on the line 66 of Fig. 7; and

Fig. 7 is avertical section taken on the line 7--7 of Fig. 6.

Referring more particularly to Figs. 1-5, the floor polisher includes a casing 10 enclos- 11.- The usual commutator 12 and brush elements 13 are rovided. The .motor is disposed on a vertica shaft 20. The casing 10 includes a lower ring shaped mem-- ber 14 in which the brush elements are mounted. A cap 16 is provided for the casing 10 and thevarious casing parts may be secured together in any suitable manner.

' Below the casing 10 is a frame plate 21 constituting the major part of the frame work of the apparatus. Frame plate 21 is provided with an upstanding flange 22. This flange 22 is circular and serves as a seat for the ring 568,980, and in Germany October 23,1930. 7

14: of the motor casing, there being interposed and constitutes a covering for the driven sur- 7 face contacting members. The frame plate 21 and the ring 14:: may be secured together in any desired manner as by bolts or rivets,

provided the nnder side of frame plate 21 is left as a smooth surface, at least for certain portions thereof, for reasons presently to be explalned. In frame plate .21 and within flange 22 is an aperture 25 within which is positioned the lower part of motor shaft 20 and a lower bearing assembly 18 supporting the lower end of the motor shaft. The ball bearing assembly is'carried by a depending separate member 17 which rests on ring 14.

Secured to frame plate 21 at 26 is a fixed support 27 having a ball bearing 28 comprising an inner iixed member 29 and an outer rotatable member 30. The outer rotatable member is secured to a carrier or implement disc 31 which is consequently mounted so that it can rotate but which does not have radial movement. This disc is termed a carrieror implement disc because it, so to speak, carries the brush disc or other implement 32. Brush disc 32 is detachably secured to carrier disc 31 by means such as snap spring arrangements 33 0f the type shown in copending applica tion Serial No. 286,663fi1ed June 19, 1928 by Axel. Olof Engberg et .1., now Pat. No. 1,901,497, granted March 14 1933. implement disc 31 may be said to be fixed or stationary relative to the framework since it rotates on a fixed axis.

Below and parallelto frame plate 21 is what may be termed a guide plate. Gu de plate 34 has an upper smooth surface WhlCh is disposed a given distance from and parallel to the under smooth surface of frame plate bearing 39, the outer race being secured to the carrier disc and the inner race being secured to a bearing spindle 40. Bearing spindle 40 is secured to the outer end of a yoke or U-shaped member 41.

Yoke 41 has side arms or fingers 42 which have upper and lower smooth bearing surfaces. These bearing surfaces of yoke 41 are parallel and are spaced apart substantially the same distance as the distance between the lower bearing surface of plate member 21 and the upper bearing surface of guide plate 34. The fingers 42, as shown in Fig. 4, are positioned between the members 21 and 34 and the yoke member 41 is of a width less than the distance between the two adjacent abutments 36 whereby the mounting for this disc 37 is floating in the sense that the axis of thedisc is capable of having undirected movement in a horizontal plane as well as rotational movement. The mounting however, preferably does not have vertical movement. Vertical movement would be possible since the weight of the apparatus is carried down through the brushes or other surface treating members-to the floor and there is a reactionary thrust upwards of the yokes 41 against the under surface of the frame plate 21. It is preferred that there be a minimum of play between the top and bottom surfaces of member 41 and the bearing surfaces of parts 21 and 34 respectively.

Each yoke 41 has a projection 43 with ahole therein in which one end of a tension spring 44 is secured or hooked. The other end of each tension spring 44 is secured to or hooked onto the framework as b being hooked around a .pin 45 attached to frame plate 21. The arms or fingers 42 of the yokes 41 have parallel inner sides, and are rounded off at their ends to serve as guidesv for the springs 44 while preventing catching of the springs on the yokes.

Each carrier disc. has a circumferential smooth surfaced tire,'hoop or ring 46 the outer surface of which is a c lindrical contact surface. Surrounding the ll iwer end of shaft 20 and secured thereto is a cylindrical member 47 which, as one example, may be made of steel. I term this member the driving member. It will be understood that this member may be one piece with theshaft 20. The springs 44 are so positioned that they y discs 37 and draw the discs 37 and 38 each against the driving member 47 on the one hand and dlSC 31 on the other hand. Referring to Fig. 3, it will be seen that if the driving member 47 rotates in a clockwise direction, discs 37 and 38 are both driven in counter-clockwise direction, whereas disc 31 is driven in clockwise direction. This provides the advantage that one of the discs is rotated in opposite direction to the other disc. Consequently the brushes or other tools can be shifted so that they operate first in one direction and then in the other direction. This increases the life of brushes. Again referring to Fig. 3, it will be seen that each spring 44 is arranged in a line which bi-sects the angle formed by those radii of the movable disc to which the respective spring is attached which extend to the points of contact with the dr ving member 47 and the fixed disc 31 respectively. The spring 44 must obviously be strong enough to provide sufiicient contact between the rotating members to drive the carrier discs from the driving member 47. It will be seen that the axes of the discs 37 and 38 are parallel to the axis of disc 3]. but have relative movement thereto and relative move: ment to each other within the limits determined by the strength of springs 44 and the abutments formed by the spacers 36. It will be evident that the driving member drives discs 37 and 38 directly and that disc 31 is indirectly driven through the discs 3'? and 38. Discs 37 and 38 are therefore intermedia-tely disposed discs with respect to the driving member and the fixed disc.

Under certain circumstances it may be advisable to provide the driving member 47 with a friction surface of rubber and one or more of the carrier discswith steel rims or all the rims may be of metal or other material. I believe, however, that the best results are obtained by using a metal driving member and tires of rubber, leather or similar material for the discs. The floor polisher has a handle 9 for guiding the same.

Referring now to Figs. 6 and 7, these figures show a modified mounting for the brush member 41, this arrangement includes a plate having U-shaped slots 76 and 77 formed in theends thereof. The member 75 is widened bilaterally as indicated at 74 and supporting studs or pins 78 are secured to the extended portions to serve as anchors for a pair of springs 52. These springs are secured to or hooked around similar studs 79 secured to a plate 80 which may be substantially coextensive with the disc member, and which is secured to the frame plate 21 by suitable means such as screws or bolts 81. The plate or disc 75 is slightly dished at the center and apertured to, receive the bearing spindle 40. A washer 82 provides a gripping member for 38. Instead of the yoke shaped limited by the relative the nut which secures the bearing spindle 41 in position on the plate 75. The splate 80 is suitably apertured to receive the nut 83 and the upper end of the bearing spindle.

Round plates 87 aresecured to plate 80 by.

screws 85 being separated therefrom by washers 86. The washers 86 are of considerably less outer diameter than the width of the slots 76 and 77. The slotted ends of member 75 have movement between the upper surfaces of plates 87 and the lower surface of plate 80, the movement thereof being size of the slots 76 and 77 and the washers 86.respectively. The springs 52 pull the plate 75 and therefore the carrier disc 37 into contact with thedriving member 47 and the stationary carrier disc 31.

The construction shown in Figs. 6 and 7 permits considerable oscillatory movement of the carrier disc. This modified construction may be of particular use in certain forms-of work where a large degree of freedom is desirable for the polishing or cleaning members.

In the surface treating machine above described, the floating discscan automatically adjust themselves with respect to the driving member independently of the relation to other driven discs. It will be seen that good friction contact is obtained at all times with a decidedly simple construction. A great advantage afi'orded by the invention isthat the gear ratio between the driving motor and the driven discs can be high., This is advan tageous for operation and has not been possible with floor polishers previously known. Furthermore, silent power transmission 15 possible. Furthermore, the advantages of the three-disc floor polisher are obtained in the Y axis,

interchangeability of the brush members and the overlap of areas contacted by the respective brush elements.

1 While I have described a preferred means for carrying out the invention, it will be understood that the invention is adaptable to embodiment in a vari ty of structures and I am not to be limited to any particular structure except as defined by the appended claims taken in connection with the state of the prior art. What I claim is I 1. In a machine of the character set forth, a first implement disc, means for rotatably mounting said disc on a fixed vertical axis, a driving member, means for rotatably mountin said drivingmember on a fixed verticaltatably mounting said second implement disc on a floating vertical axis, and means for resecond implement disc in driving relation with said driving member and said first im lement disc so that the second implement time is directly driven by the driving member and in turn rotates the first'implement disc.

a second implement disc, means for ro-' mounting said driving member on a fixed Y vertical axis a second lmplement disc, means for rotatably mounting said second implement disc on a floating vertical axis, and tension means for retaining said second implement dlsc in drlvlng relation with said drlving member and said first lmplement disc so that the second implement disc is t directly driven by the driving member-and in turn rotates the first implement disc.

3. In a machine of the character set forth, a first implement disc, means for rotatably mounting said disc on a fixed vertical axis, a driving member, means for rotatably mounting said driving member on a fixed vertical axis, a second implement disc, means for rotatably mounting said second implement disc on a floating vertical axis, and elastic means for urging said second implement disc into frictional engagement with said driving member and said first implement disc-so that the second implement disc is directly driven by thedriving member and in turn rotates the first implement disc.

4. In a machine of the character set forth,

a first implement disc, means for rotatably 6. In a machine of the character set forth,

a first implement disc, means for rotatably mounting said disc on a fixed vertical axis, a driving member, means for rotatably mounting said driving member on a fixed vertical axis, a second implement disc, means comprisin a yoke and guide means therefor for rotata 1y mounting said second implement disc on a floating vertical axis, and tenslon means acting on said yoke for retain mg said second implement dlsc 1n driving relation with said driving member and said 7 first implement disc so that the second implement disc is directly driven by the rdriving member and in turn rotates the first implement disc.

6. In a machine of the character set forth, a first implement disc, means for rotatably mounting said disc on a fixed vertical'axis, a driving member, means for rotatably mounting said vertical axis, a second implementdisc, means driving member on a fixed for rotatably mounting said second implement disc on a floating vertical axis, and means for retaining said second implement disc in circumferential contact with said driving member and said first implement disc so that the second implement disc is directly driven by the driving member and in turn rotates the first implement disc. 7

p 7 In a machine of the character set forth, a first implement disc, means for rotatably mounting said disc on a fixed vertical axis, a driving member, means for rotatably mounting said driving member on a fixed vertical axis, a plurality of intermediately disposed rotatable discs and means for retaining each of said intermediately disposed discs in friction'al driving contact with said driving member and said first implement disc whereby the driving member and said first implement disc are rotated in the same given direction and the intermediately disposed discs are rotated in the same direction with respect to each other but oppositely with respect to the driving member and first implement disc.

8. In a machine of the character set forth, a first implement disc, means for rotatably mounting said disc on a fixed vertical axis, a driving member, means for rotatably mounting said driving member ona fixed vertical axis, a plurality of intermediately disposed discs, means for rotatably mounting said intermediately disposed discs on floating vertical axes, and means for retaining each of said intermediately disposed discs in frictional driving relation with said driving member and said, first implement disc whereby the driving member and said first implement disc are rotated in the same given direction and the intermediately disposed discs are rotated in the same direction with respect to each other but oppositely with respect to the driving member and first implement disc.

9. In a machine of the character set forth,

a first implement disc, means for rotatably' mounting said disc on a fixed vertical axis, a driving member, means for rotatably mounting said driving member of a-fixed vertical axis,.a plurality of intermediately disposed discs, means for rotatably mount, ing said intermediately disposed discs on floating vertical axes, and resilient means for retaining each of said intermediately disposed discs in circumferential frictional contact with said drivin member and said first implement disc where y the driving memberand said first implement disc are rotated in the same given direction and the intermediately disposed discs are rotated in the same direction with respect to each other but oppositely with respect to the driving member and first implement disc.

10. In a machine of the character set forth, a first implement disc, means for rotatably mounting said disc on a fixed-vertical axis,

'V ,.i1'sposed discs, "s a id'inter'mediatelydisposeddiscs on fioati ing'verticalfaxes, andtension springs for a ...driving mounting said driving,"member*on; a' fixed .ti'cal"=ax-'is, a pluralityofintermediately means for rotatably-mounting 'firging' each of said intermediately-disposed "discs-into frictional contact with said driving member and said first implement disc where- -.-bythe driving'member and said first implement disc are rotated in the same given=direction and the intermediately disposed discs are rotated in the same direction with respect to each other but oppositely with respect to she driving member and first implement isc.

11. In a machine of the character set forth, a first implement disc, means mounting said disc on a fixed vertical axis, a driving member, means for rotatably for rotatably member, means for rotatably mounting said driving member on'a fixed vertical, axis, a'plurality of intermediately disposed discs, means comprising spaced guide plates and members guided therebetween for rotatably mounting said intermediately disposed discs on floating vertical axes, and tension springs for retaining each of said intermediately disposed discs into direct frictional contact with said driving member and said first implement disc whereby the driving member and said first implement disc are rotated in the same given direction and the intermediately disposed discs are rotated in the same direction with respect to each other but oppositely with respect to the driving member and first implement disc.

12. In a machine of the characterset forth, afirst implement disc, means for rotatably mounting said disc on a fixedvertical axis, a driving member, means for rotatably mounting said driving member on a fixed vertical axis, a plurality of intermediately disposed rotatable discs and means formtaming each of said intermediately disposed discs in frictional driving relationwith said driving member and said first implement disc whereby the driving member and said first implement disc are rotated in the same given direction and the intermediately disposed discs are rotated in the same direction with respect to each other but oppositely with respect to the driving member and first implementdisc, each of said retaining means comprising spring means acting in a line between the radii from the center of the respective intermediately disposed discs to the points of contact thereof with the driving member and said firstimplement disc respectivelv.

13. In a machine of the character set forth, a framework, a first implement disc. means for rotatably mounting said disc in said framework on a fixed vertical axis, a driving member, means for rotatably mounting said driving'member in said framework on a fixed vertical axis, a pluralty of intermediately disposed rotatable discs, means for mounting said intermediately disposed discs in said framework on floating vertical axes comprising spaced members and supporting means guided thereby, and means for retaining each of said intermediately disposed discs in frictional driving relation with said driving member and said first implement disc whereby the driving member and said first implement disc are rotated in the same given direction and the intermediately disposed discs are rotated in the same direction with respect to each other but oppositely with respect to the driving member and first implement disc, each of said retaining means comprising a spring acting in a line between the radii from the center of the respective intermediately disposed discs to the points of contact thereof with the driving member and said first implement disc respectively. I

14. A surface treating machine comprising a framework, a driving member mounted on said framework to rotate about a fixed vertical axis, means for rotating said driving member, a first implement disc mounted on said framework to rotate about a fixed vertical axis, a second implement disc rotatably mounted on a. floating vertical axis, means for supporting said floating axis on said framework so that the former may .have undirected movement in a horizontal lane, and means for urging said second implement disc into frictional engagement with said driving member and said first implement disc.-

15. A surface ing a framework, a driving member mounted on said framework to rotate about a fixed vertical axis, means for rotating saiddriving member, a first implement disc mounted on said framework to rotate about a fixed vertical axis, a second implement disc rotatably mounted on a floating vertical axis, means for supporting said floatingaxis on said framework so that the former may have undirected movement in a horizontal plane, and tension means for urging said second implement disc into. frictional engagement with said driving member and said first implement disc.

16. A surface treating machine comprising a framework, a driving member mounted on said framework'to' rotate about a fixed vertical axis, meansfor rotating said driving member, a first implement disc mounted on said framework to rotate about a fixed vertical axis, a-second implement disc rotatably mounted on a floatin vertical axis, means for supporting said oating axis on said framework so that the former may have undirected movement in a horizontal plane, and elastic means for urging said second implement disc into frictional engagement with treating machine comprisframework so that the former may have undirected movement in a horizontal plane while being restrained from movement in a vertical direction, and means for urging said second implement disc into frictional engagement with said driving member and said first implement disc.

In testimony whereof I hereunto afiix my signature.

ANDERS )ERIKSSON-JONS.

Images