US1936992A - Sanding machine - Google Patents

Description

B. D; PINKNEY SANDING MACHINE Nov. 28, 1933.

2 Sheets-Sheet l Filed Feb. 28, 1930 m M 9 7m T 7 .my QW Pam n a V M Qw Nn Vw 3 3 g A w \VIW, 1

O N 1 IAIIIIIH I I l R@ V B. D. PINKNEY SANDING MACHINE Nov. 28, 1933.

Filed Feb. 28, 1930 2 Sheets-Sheet 2 4 y m 7 N r e Z M 8 r 4 W am %w 4 .y 1 Q v 2 n /W ////I\\\\\ m F j Patented Nov. 28, 193 3 c J.,xa corporationfof New Jersey =1 t .applicaticn-Februaryt,19tSefialNo 432,001" j f 1 =="2-Claims.f(Cl. 51- -34) Thisiinven on relates to a s di me l and has-particular referenceto mechanismjor; axially oscillatingv drums of machines ;o f;this character. 1 a

'- In order to prevent: the f ormationi of in the surfaceof woodbeingsanded; it is. cus tomary tooscillate one o pmore ofthe sanding drumslof such machine axiallywhereby the sure face is more evenly; smoothedv and markings which would ordinarily'result from axially stationary drums are eliminated. It has been com-a mon heretofore to impart 's uch axia1- oscillation to drums by meanspflevers which are rocked 1 'by eccentricsv mounted one drive shaft. Devices Detailed objects of the invention relating to the provision of means for automatically maintaining the oscillating mechanism in operative tilted, andother details ofconstruction will be apparent from the following description read in conjunction with the accompanying drawings, in

I which: a 7

' Fig. 1 is a side elevation of the machineembodying the present invention; i v

Fig. 2 is a fragmentary sectional view showing details of the construction; y

Fig. 3 is a sectional view showing the connection of the eccentric pin to an oscillating block whereby oscillatmgmotions are imparted to a drum; and. i v r Fig. 4 is a plan view of the subjectof'Fig. 3. The machine, which is of a standard type of third sanding drums 8 and 10 have axial oscillations imparted thereto. While only three drums are shown, it will be obvious that more or less may be provided and that the invention is ap-* 3 1; plioable to one or more drums of this general 1 Bryan DfPinlme y; smithville J., assignor i H. B. "Smith Machine ,Company Smithvifle Qfthis character have generally a relatively large number of connections where play may occur causing noise in operation of the machine. Fur-.

relationship with the drum when the same is construction, comprises a frame 2 in .which is oscillation imparted to it whereas the second and,

character. The sanding drums are either belt drliven ior motor drivem" thelatterc'ase sep rate motorsareprovidedto drive the drums. ..A- 1

biak ns-cevice; 2,.c r the charac terl disclosed .my prior.Baten t No. 1,715,385, dated uries; 1929, 'isn id d.- q s p. e r msfiiu sk nwhen-filef e drums are; mounted in suitable bearings indicated. generally 'bythe jnumeraLZO carried in verticallyvadjustable brackets; 14;, 16 and 18,: these bracketsvbeing duplicated on the oppositelside of the machine. Separateadjustments vof these various brackets serve to tilt independ axes of the drums asmay be desired.

-; "Referring to Fig. 2; wher in th details ofthese bearings is .lisclosed, namely,,the .one as-J ntly the q sociated with. the axial oscillating sanding drum 1 8, 22 indicates: an outer housing which is; carhousing from a' pressure'device :which may be secured in the usualfashion to thevalve'nipple 26. The pin'24 projects loosely. withinan open.-

IfiedjlPOHgIhBlbIflokGt l6. An axiallypertoratedf pin 24 is threaded into the top of this housing and is arranged to conductlubricantinto. the

ring 32 and being clamped by facingringscarried on the opposite sides: of the ring 28. The

inner faces of the races 30 are smooth SQ. that." the rollers 34, whic h are maintained-in grooves f i in the inner races of the bearings, may slide axially therein. Accordingly, even though the bearing 20] is stationary during operation; the a shaft carrying the sanding drum 8 may oscillate in an axial direction. To' permit free tilting of the axis of the sanding. drum relative to the faces without producing any binding ofv the.

movi g parts; The construction of .bearing disclosed is more fully-desctibedand claimed in my co-pending' applicationfser. No'.432 ,002, filed f February 28, 1930.-

- The inner race 38 of a ball bearing-is secured to the outer end ofthe shaft'of the sandingdrum 8; The balls of this .ball bearing are maintained in grooves'inthe inner race 38 and thejouter race'40, so, that relative axial movements of'the two races *cannotytake place. Accordingly any"; movements impartedto the outer, race in an axial direction will'be transmitted to oscillate the sanding drum. 4

The ampedt waa as.

7 'ing 42 and its-cover 44. These two members are formed to provide a slideway extending transversely 'tovthe" direction of the axis of rotation and in which slides a block 48' having a vertical bore 50 therein receiving a pin 52 carried eccentrically to its axis by a shaft 5 4. A spring 56, reacting between the block-48 and-a bearing 58 carried by; the frame, tends'to maintain the block inits uppermost position against the top of the groove in the casing, whereby rattling is pre? vented which would normally occur if the end oi the drum in question were lifted relatively to the frame. tenance of the block 48 against the top of the groove prevents the housing- 421mm turning about the axis of the'drum. T The block 48. is, of

course, free to slide upwardly on p in 52.- I The'two shafts 54 which are provided inthe present instance. carry bevel gears 60" at their lower ends, meshing with bevel gears62 onla shaft '64 driven by the usual reduction gearing, It may be noted that the shaft 64' corresponds to the shaft usually provided in such machinesto' carry the eccentrics which serve to escillate'the 1 levers, which in turn impart, oscillating 5move-;

ments to the drums -By-reason of the provisions of set screws or similar detachable connections between the bevel'gears 62 and the shaft 64, the bevel gears may be readily freed from'the shaft and moved axially therealong totake one or'both v be noted 'that this housing, as well as the housing of lthe bearing 20,'for-m lubricant; chambers and'are provided where the shaft passes 'therethrough withgrease collecting rings so thata constant supply of lubricantis maintained at the various bearings. v 1 1 g The connections just described impart very smooth oscillating movements to the drums with a minimum of wear and vwithout'noise. This is primarily due to the minimum number of connections' and the factethat rotating parts are used whereby inertia of. movement which might impart j'ars'to the machine is prevented;

What I' claim and desire to protect by Letters Patent is:

1.. A sanding machine 'including a frame, a It will also be noted that this main: film ng d a ax a ly Oscillatable shaft amounting the drum in the frame, a member caried by the shaft and. secured against endwise -m.ovement "relatively thereto and providing a slideway'extending transversely to the shaft, a l

bloc}; ranged to sliderin the slideway, a shaft ried by the secondshaft and engaging the block,

an, adjustablebe'aring for the first shaft, and resilient meansforholding the; block in proper po-' sitienin the-slideway in variouspositions of .adjustment of the shaft;

,2. A'sanding -machine including a frame, a

sanding member including an axially 'oscillatable shaft, a member carried by the shaft'and secured against endwise movement relatively thereto and providing aslideway extending transversely "to the shaft, a block arranged to' slide in the slideway; a shaft extending approximately at right angles'to the first mentioned shaft, an eccentric-- member carriedby thesecondshaft and engaging the block, an adjustable bearing for the first shaft,

and resilient means ffor'holding the block in proper position in'the slideway in various posi-,

tions of adjustment of the shaft 4 1 BRYAN D. PINKNEY.

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