US1372509A - Roller or like machine part - Google Patents

Description

F. V. HETZEL.

ROLLER 0R LIKE MACHINE PART. PPL'ICATION FILED 1AN.11;1919.

1,372,509; Patented Mar.22,t1921.

UNITED STATES PATENT OFFICE.

g `lEIREDERIC Vf HETZEL, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO LINK-BELT COMPANY, `OIi CHICAGO, ILLINOIS, A `".3ORIORATION OF ILLINOIS.

` ROLLER 0R LiKE Mannini; PART.

" Specication of Letters Patent. Patgnted 13,13 22, 192L Application filed January 11, `1319. SerialnNe. 270,696.

To all whom it may concern.'

Be it known that I, Fniinnnio V. HETZEL, a citizen of the United States, and a resident of Indianapolis, county ofMarion, State of Indiana, have invented certain Improve ments in Rollers or like Machine Parts, oi which the following is a specification.

My invention relates to certain improve-- ments in wheels, rollers, and like machine parts, in which there is a rim having a chilled surface, and a hub, also having a chilled surface.

@ne object of my invention is to design the roller, or other element,`so that the chill mandrel for the hub can he readily withdrawn, leaving an opening with parallel sides.`

A further object of the invention is to make a roller, or other machine element,

having a chilled periphery, and a chilled hub, in which the bore can be made of an even diameter throughout-` In the accompanying drawings:

Figure 1 is a side view of a roller illustrating my invention;

Fig. 2 is a sectional Fig. l; i

Fig. 3 is a perspective view of the hub, showing the cracks made therein, due to the breakage of the parts;

view on the line 242,

Fig. l is a side view illustrating a hub in which a rectangular opening is formed;

Fig. 5 is a face view of a plate wheel illustrating my invention; and

Fig. 6 is a view illustrating a modification of the invention.

In the present instance, l is a roller `adapted to travel on a track and arranged to sup port conveyer or other chains. This roller has a rim 2 and a flange 8. The surface et of the flange, as well as part of the rim, is chilled in the ordinary manner. 5 is a 'hub and 6, 6 are spokes extending from the rim to the hub. These spokes may be made in any suitable manner and are preferably niadeas shown in Fig. i. Each side ot the hub 5 is recessed, in the present instance, as at 7, leaving a comparatively narrow web 8. The internal surface 9 of the hub is chilled and the opening 10, iormed in the hub, is of an even diameter throughout.

In ordinary practice, if a chill mandrel of an even diameter throughout be used, it is impossible to withdraw the mandrel from the hub without destroying it, owingto the shrinkage of the parts onto the mandrel. In some' instances, the opening may be made by providing the mandrel with a considerable taper. This is objectionable, as it is diliicult and expensive to grind or bore the chilled hub so as to provide an opening of an even diameter to allow the roller to rotate freely on a pin.

I have found that by making the recesses in the hub, as at 7, which reduce the inner wall at one or more points to a mere shell, that when the roller, or other machine element, cools, it will crack the web or webs S, and this cracking or parting of the hub allows ior the withdrawal or the mandrel.

`The cracking of the hub does not materially reduce the strength of the roller, nor does it interfere with its travel on the spindle, or pivot pin. The result is that I obtain a true hardened bearing.

By making the roller, as indicated in Fig. l, where the hub is made in two sections connected together by narrow webs, and by arranging substantial spokes to support each section, the strength oit the roller is not iinpaired to any appreciable extent andits life is prolonged, due to the chilled surface at the hub, as well as at the periphery.

'While I have shown a cylindrical opening in the hub, as in Fig. 1, the opening may be of any shape desired. In Fig. 4C, I have illustrated a rectangular opening.

In some instances, a single slot may be madeto form one weak spot, or more than two slots may be made, if desired, depending upon the size and character of the hub.

While I have shown a roller havin@ a chilled rim and a chilled hub, the chilled rim may be dispensed with in some instances, but it is highly desirable to make this hub in the manner shown where there is a chilled rim, as the rim has a tendency to shrink, and, as its surface is more `e2;- tended than that of the hub, it tends to contract the hub and bind the chill mandrel therein.. 4

Instead of the spokes, a plate may be used to connect the rim and the hub, as shown in Fig. 5, and the wall may he made with a single or a double plate, as desired.

InlFig. 6,1 have shown the hub having three perforations 7, which form. the webs 8EL in the hub, and these may be formed by cores in the ordinary manner so that when the roller, or other machine element, cools,

the hub-Willbe cracked at these points andl the Chill mandrel can be readily Withdrawn.

Bythe abovel oonstruotiom it will be seen that I am enabled to make a roller, or other element, havinga rim and hub, in which the periphery of the rim is chilled, as Well as the Wall of the pivot pin opening in the hub.

I claim:

l. A roller, or like machine element, having an integral hub'and rim; said hub having alongitudinal opening therein, the Walls of the opening intheahub being` chilled, and the hub beingreduced at one or more points to form a-Weak portion, so that as the hub expands during cooling, it may crack to :1lloW for the Withdrawal of the chill mandrel.

2. A roller, or other machine element, luwing a rim and hub in the form of un integral Casting, the hub having n longitudinal opening therein of un even diameter throughout, the periphery of the rim :1nd the walls of the opening being chilled, und the hub beingr reduced at one or more points to form :i weak portion or portions, the hub being' cracked :it the Weak portions to allow for the removal of the ehill mandrel.

In witness whereof I aiix my Signature.

FREDERIC VI HETZEL.

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