US2134263A - Supplementary support for the shaft of power-delivery belt-pulleys - Google Patents

Description

J. REID Oct. 25, 1938.

SUPPLEMENTARY SUPPORT FOR THE SHAFT OF POWER-DELIVERY BELT-PULLEYS Filed Aug. 21, 1936 2 Sheets-Sheet 1 INVENTOR v JOHN REID BY Z '5 -'ATTORNEY Get. 25, 1938. J. REID 7 2,134,263

SUPPLEMENTARY SUP PORT FOR THE SHAFT OF POWER-DELIVERY BELT'PULLEYS Filed Au 21, 1936 2 Sheets-Sheet 2 VENTOR REID ATTORNEY Patented Oct. 25, 1938 SUPPLEMENTARY SUPPORT FOR THE SHAFT OF POWER-DELIVERY BELT-PUL- LEYS John Reid,

Oil City, Pa.

Application August 21, 1936, Serial Nb. 37,126;

' 1 Claim.

This invention relates to a supplementary support for the shaft of power-delivery belt-pulleys of engines of various types; the embodiment of this invention is herein shown and described as being applied to the power-delivery side of the bed of an internal combustion engine in axial alignment with the adjacent crankshaft bearing of said bed.

Briefly stated, the invention consists of a tubular, extension bearing or quill which is firmly secured to and extends laterally from the bed of the engine with its bore in axial alignment with the axis of the crankshaft and through which the adjacent end of said shaft extends, with its outer extremity projecting therefrom.

The power-delivery pulley is mounted upon the quill of said extension-bearing and has driving connection with said projecting end of the crankshaft.

The objects attained by this invention are:

1. A better distribution of the strain caused by the heavy tension of the power-delivery belt and the removal of a material portion of such strain from the adjacent bearing formed in the engine bed.

2. Obviation of the necessity of an outboard bearing, thus causing the engine to be a self-contained power unit.

3. An overhung pulley, which, by the dispensing with an outboard bearing, greatly facilitates 30 the placing and the removal'of the power-delivery belt.

4. A material reduction in the cost of setting up the engine in its service position, because an outboard bearing is dispensed with.

5. A higher salvage value of the power plant upon account of being a self-contained unit, the diminished space which it occupies together with a reduction of Weight, as compared with the outboard type of plant.

In the drawings:

Fig. 1 is a vertical section through one side of the bed of an internal combustion engine at the central point of the crankshaft bearing and said tubular bearing, the adjacent portion of the 45 crankshaft being shown in elevation; the upper half of the power-delivery pulley is also shown in central vertical section, the lower portion being omitted.

Fig. 2 is an end view of the outer end of the power-delivery pulley and the driving plate whereby the pulley is operably connected to said crankshaft.

Fig. 3 is an illustrationelevationof the outer 55 end of a power-delivery pulley, the construction ofwhich is modified for the purpose of adapting it for use on engines of high power capacity.

Fig. '4 is a section on line IVIV of Fig. 3 look ing inthe direction indicated by the arrow points.

Fig. .5 is aside elevation of that portion of an engine bed adjacent the main bearing, together with said tubular bearing and the integrallyformed plate whereby said bearing is attached to said bed. e v

Fig. 6 is a projection of the adjacent portion of Fig. 5, illustrative of one of the adjusting devices for said plate.

Fig. 7 is a section on line VII--VII of Fig. 5.

Fig. 8 is an inner-face View of a detail termed the adjusting washer. v r

The embodiment of my inventive idea, as illustrated in Figs. 1 and 2 of the accompanying drawings, is substantially as follows:

The bed of an internal combustion engine is in- 1 dicatedby the numeral l the main bearing of said. bed is indicated by the numeral 2; a crank is in-' dicated by the numeral 3, and 4 is the crankshaft.

A horizontally-extending, tubular hub 5 and its integral quill or barrel 8, is rigidly attached to the outside ofsaid bed with the axis of the bore of said quill in alignment with the axis of said main bearing: Said tubular hub is rigidly attached to said b'ed by'm'eansof-the' plate 5 when this supplementary support is applied to small engines; but'when applied to enginesof largersize' and high powerrating, the plate 5!, asshown in Fig. 5, is .mg ployed," and in the'manner hereinafter set forth.

As shown in Fig. 1 of the drawings a driving pulley 1 is revolubly mounted upon the quill 8 of said hub; said shaft 4 passes through the bore of said quill and extends outwardly therefrom; upon said outward extension is rigidly secured a driving plate 9, as by means of a key l0; driving power is transmitted by said plate 9 to the pulley I, by means of the dowels II, one of which is clearly shown in Fig. 4 of the drawings, the outer ends of which appear in Fig. 3. v

The drawings show an antifriction bearing l2 interposed between the periphery of said barrel and the adjacent wall of the bore of the pulley, but such a bearing, or any equivalent thereof, is optional with the user and is not claimed as a portion of this invention.

The annulus I3, is supplied with a packing I4 for the purpose of retaining lubricant about the bearings l2, also for excluding dust therefrom.

The construction thus far described, illustrated in Figs. 1 and 2, relates to the simple essentials of an embodiment of my invention as employed in engines of comparatively small power rating;

owing, however, to the possibility that there may be, in engines of higher power rating, a difierence in the degree of wear between the crankshaft and its bearing 2 in the engine bed as compared with its bearing in the bore of the tubular hub or quill 8, certain modified details of construction are employed whereby any consequently necessary universally-radial-wise adjustment of said quill relatively to said main bearing may be easily and quickly made; said details of construction are illustrated in Figs. 4, 5, 6, '7 and 8.

Fig. 5 is a side elevation of a portion of an engine bed adjacent the crankshaft bearing, together with its quill or tubular bearing 8 and its attaching plate or flange 5', whereby said quill is secured to said bed; as previously stated said flange 5 is attached to the engine bed by means of bolts or capscrews, and the holes 6' in flange 5 through which said screws pass are largerin diameter than said screws, whereby universallyradial-wise adjustability is provided for. For the purpose of causing said adjustment, a plurality of adjusting devices are provided; those adapted for causing lateral adjustments consist of an annulus l5 which is provided upon its inner face with two oppositely-positioned contact-lugs IS; the central opening in each of said annuli l5, I5, is adapted for the free passage of a bolt I! therethrougli, the inner end of said bolt being screwthreaded into a tapped hole in a suitable flange I8 in the adjacent portion of said bed. Said annulus is functionally applied by placing the point of oneof said lugs H5 in contact with flange l8 and the other point IS in contact with the adjacent edge of flange 5' with bolt 11 passing therethrough; a plurality of said annuli are disposed about the edge of said flange 5. By loosening a nut upon either of the bolts I1 and a compensative tightening of the nut upon the oppositely positioned bolt, such laterally-radial adjustment of said plate 5' and its quill is caused as may be required to re-position the axis of said quill in true axial alignment with axis of the bearing in said bed in the event of an unequal amount of wear in said bearings, so as to insure an equal distribution of the load of said shaft within each of said bearthe lower edge of the bed; the upper threaded end of said jack occupies a tapped hole formed in the bottom of said plate 5 at the point 2 I.

Upon account of said universal adjustability 01' said plate, conformably to the wear of said crankshaft in bearing 2, provision is made for a slight degree of differential movement between the driving plate 9 and the pulley I; said differential feature appears in Fig. 4, in which it is shown that there is a slight reduction between the largest diameter of dowel l l and the circumferential walls of its socket l I; in order to prevent, or at least to reduce to a minimum, any backlash between pulley I and said driving plate 5, which may be possible upon account of said reduction in diameter of said dowel, a spring-pocket 22 is formed through said plate and extends coincidentally into an adjacent spoke of said pulley; within said pocket is inserted a flat piece of spring steel 23 which overlaps the joint between said driving plate and spoke and bears upon the bottom wall of the pocket of both thereof; said plate is caused by means of a setscrew 24, to press firmly upon said bottom walls, and to thereby reduce to a minimum any previously mentioned possible backlash.

I claim the following:

A supplementary support for the shaft of power-delivery beltpulleys, comprising in combination, a power-delivery shaft; a main bearing in which said shaft is mounted; a supplementary tubular, extension bearing carried by the structure in which said main bearing is formed, the axis of the bore of said tubular structure being in alignment with the axis of said main bearing, and from the outer end of the bore of which tubular structure said shaft projects, a power-delivery belt-pulley revolubly mounted upon the barrel of said'tubular extension bearing, and from the outer end of which said'shaft projects, a driving plate for said pulley, mounted upon and keyed to said projecting end of said shaft, and driving means connecting said plate to said pulley, said driving means being adapted to conform to a slight amount of radial-wise disalignment between the axes of said main bearing and the bore of said tubular structure when said disalignment is caused by an unequal amount of wear between said bearings.

' JOHN REID.

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