USRE23513E - Sheetsxsheet i - Google Patents

Description

June 24, 1952 Original Filed June 4. 1948 E. K. JOHANSEN CRANKSHAF'T BEARING ASSEMBLY Re. 23,5 l 3 2 SHEETS--SHEET l @yf/@gm June 24, 1952 E. K. JoHANsl-:N

CRANKSHAFT BEARNG ASSEMBLY 2 SHEETS-SHEET 2 Original Filed June 4, 1948 Ressued June 24, 1952 Rg.

CRANKSHAFT BEARING ASSEMBLY Einar K. Johansen, Oak Park, Illi, assignorff to Clearing; Machine Corporation, Chicago, IIL, Ia corporation of -Illinois Originall No. 2,573,574, dated- October 30; 1951",

SeralNo. 31H23, June 4, 1948. Application for`l` reissue February-'2; 1952, Serial1No. 269,630;

zzolaims.. (orcos-23.)

Matter; cnclo'se imheavy' brackets E' appears inY the original"- patentvv but formsnofpart oftliisnissues'peci'cation; matter" printed; in'italicsi indicates the` additions made 'by-reissue;

This; invention. relates. in .general to improvements in metal .Working presses of the C-frame type, andi is particularlydirected to a new and improved form; ofi. crankshaft. bearing assembly for such presses. The invention, however, has general' application, and. it is shown hereinas appliedto agap-frame press, primarily for purposes of.l illustration.

Gap-frame presses, and particularly those. of

2. ber. for-'use'in-.the crankshaftibearing-'assembly of gap-frame presses.

Other objects and advantages of the. invention Will become apparentupon` readingfthe; following l description taken in. conjunction with the'` accompanying drawings; inv which: Y

Fig; 1 isa side elevationaliviewofian inclinable C-frame orgap-frame press; showingganexample of the type of press: to which the present inventhe inclinable` type, have beenmanufactured, for 10 tion may be. applied; a number of years, and are made ina number Fig. 2` is a fragmentary View ofthe head or of` different sizes. sothat the pressures obtainable upper part of the frame; showing( a portion of duringoperation.oftliepress range-upwardly to the crankshaft bearing` assembly in vertical severaltons. One of the major obstacles in the section. manufacture oftliese presses has been thema- 15 Fig'. 3.is a fragmentary view ofthe upper porchining operations which must necessarily be tion ofthepress frame partly inv elevation,land performed thereonin the Vicinity of the crankpartly in section, showing the individual'bearings shaft bearing. assembly. In present construcintplace. tions, itlis necessary to perform machining oper- Eig. 4 is a view similar to Fig. 2, with the ations on the-frame of 'the press, and the size of 20 bearing member and fastening means removed these frames-renders such machining operations therefrom,vand dilcult and'expensive. The present invention is Fig.5 is a perspective View. of" a preferred form directed primarily to avoiding some of these of individual bearingl member. machining operations on the frame of the press As stated hereinabove, the invention herein is itself.; thus reducing the costof manufacture. 25. not restricted to, use with a gap-frame press, but An important object of the present invention such a press has been illustrated herein as one is therefore to provide a new and'improved-crankof theA preferred types of' metalworking press to shaft bearing assembly for use in metal Working which the. invention is particularly applicable. presses which will overcome the disadvantages Gap-frame pressesof the inclinable type, and the set forth hereinabove. and whichv will lessen the operation of l such. presses, are. generally well manufacturing cost of such presses. known tothose skilled inthe art, and-it is only Another Object 0f the invention iS t0 Provide a necessary heretodescribe briefly the various parts crankshaft bearing assembly OI' gap-frame ef the press and its manner of. operation, in order DreSSeS which Will eliminate-the-neoessity forany that the present invention and its application to mahi'nngperalionsontheframe of theplieSS :55 the press. may be more` easily understood and itselfl appreciated.

Al further object offtheinvention is to provide Referring. especially to..Fig..l, of the drawings, a Crankshaft bearing. assembly forgap-f-rame thebase ofthe pressis indicated by the numeral presses wherein abearingmember is formedand vI, and. the frameof the press is indicated. at 2, maChinedSDS-latly. and thereafter 'flppledf t0 40 The base I- has spaced upstandingd sides thereon thehead 0f the IJIeSS` frame and Whel'llk the between which the' frame 2- is located, and to bearings.maybe assembled with the crankshaft whicnthisfr-ameispivotallyvconnected as at 3. prionto. mountingV on. the frame-ofY the press. The frame of them-ess is capable of beingy in- Still. another` object ofthe invention isto pro- Clined, and pivoted, about the pivotal point 3. vide a crankshaft bearing assembly fOr a gap: 45 and may be maintained in any oney of: a pluralframe press. wherein individual bearing members ity of inclined positions by reason. ofv the Openareii'rst. formed' and machined. then. assembled ings; 4, which are adapted to receive a bolt; 5 with the crankshaft and inserted in placeinthe therein. The inner end of the bolt 5 is adapted head"` of the press frame. Novelmeans are also to be secured to a portion. of the frame, and provided for securing and'. mounting these. indilso thereby may hold the press in any inclined povidua-l` bearing members in the press frame and simon, forpreventing-'displacement thereof duringoper'- The press frame 2. is providedwith a bed 6' on ationof the press. which a lower'die member may be placed for co- A still furtherv object of the invention is to operation with; an upper die member for; the provides novelform-ofindividualibearing'mem- 55 shaping and workingv of metal located on the shaft.

lower die member. The upper part of the frame 2 at the forward side thereof is provided with guideways 1, adapted to guide the slide member 8 in its vertical reciprocation. The slide member 8 is adapted to carry the upper die member which cooperates with the lower die member po-` sitoned on the bed 6. These upper and lower die members are not shown herein.

The slide 8 may be reciprocated vertically in the guideways 1 by means of a connecting link 9, the lower end of which is connected to the slide 8 and the upper end of which is connected to the crank portion of a crankshaft I0. One end of the crankshaft Il) has a flywheel II mounted thereon, which is driven through the medium of belts I2 passing around a pulley (not shown) on the shaft of a motor I3, which 'in turn is mounted on a suitable bracket I4 at the rear of the frame 2. An operating pedal I5 is suitably positioned in the base I for operation by the operator of the machine. When the pedal I5 is depressed, suitable and well known clutch mechanism is actuated to thereupon rotate the crankshaft I0 and cause a reciprocating movement of the slide 8.

The foregoing in general describes the operation of a conventional gap-frame press. It Will be evident that there may be many details of such a press which may be specifically different from those shown herein, depending upon the manufacture of such presses, but in general, these presses are made and are operated in accordance with the foregoing brief description.

The upper part of the frame 2 is provided with spaced side members I6, wherein the space therebetween permits operation of the crankshaft and permits movement of the bearing at the upper end of the link 9, which clamps around the cra'nkshaft I 0. The upper ends of these side members I6 terminate in what may be called heads I1.` In accordance with present practice, these heads I 1 have semi-circular recesses therein, forming one-half of the bearing assembly for the crankshaft. The inner and outer surfaces of these bearings must form a smooth surface, and must therefore be machined. It is this machining operation of the inner and outer surfaces of the heads I1 which this invention has been able to overcome. The fact that this machining operation must be done on the huge frame of the press itself is some indication as to the cost involved. If this machining can be dispensed with, then the cost of manufacture of the press can be materially lessened.

The present invention is therefore primarily directed tov the provision of individual bearing members which may be machined prior to assembly, and then assembled onto the crankshaft before mounting in the heads I 1. It will be quite evident that the machining operation necessary for these individual bearing members will be considerably less expensive than the cost of machining the heads I1. It will likewise be evident that the task of assembling the crankshaft and mounting it on the frame will also be considerably facilitated.

The preferred form of bearing member is shown in Fig. 5, and is indicated generally by the numeral IB. This bearing member is circular in form, and has an inner bearing surface I 9, adapted to receive the ends of the crank- Annular grooves 20 are located in the outer surface of each bearing member I8, and are preferably positioned one adjacent each end of the bearing. An annular rib 2| is `located around the outer surface of each bearing I8, and is preferably positioned between the annular grooves 20 for a purpose which will presently become evident.

Each head I1 had a substantially semi-circular recess 22 therein, in substantially the center of which there is a groove 23 which has a cross section complementary to the cross section of the rib 2| on the bearing member. Each head I1 also has a pair of openings 24 extending through from the top to the bottom thereof on opposite sides of the groove 23.

When a bearing I8 is to be placed in position, the annular rib 2I thereon will be inserted in the complementary groove 23 within the head I1, whereby to prevent endwise movement of the bearing. The bearing is then held in place by means of a pair of U-bolts 25 having legs 26 adapted to extend through the openings 24. lThe curved portion intermediate thelegs 26 of each bolt 25 will be received within the annular grooves 20 on the bearing. The U-bolts 25 may be held in place by any suitable means such as the nuts 21 threaded on the ends thereof.

With this invention there is little or no machinery which needs to be done on the heads I1 which support the crankshaft on the frame. The bearing members IB may be made in quantities and machined very easily. In assembling, it is merely necessary to place one of the bearing members I8 on each end of the crankshaft Ill, and then place the entire crankshaft and bearings in the recesses 22, whereupon the U-bolts 25 may be inserted in place and fastened, and thus the mounting of the crankshaft is completed.

The annular rib 2| and the complementary groove 23 may be broadly defined as intertting means to prevent endwise movement of the bearings. It is preferable that this interfitting engagement be considered in this light, because of the obviousness that the rib could be formed on each of the heads I1 and the groove into which therib ts could be on the bearing member itself with the same result. It is likewise true that the external configuration of the bearf ing member could assume a form other than circular if so desired, and without in any way departing from the spirit of the invention, although the circular formation of the bearing member is perhaps the most economical to manufacture.

Changes may be made in the form, construction and arrangement of parts from that disclosed herein Without in any way departing from the spirit of the invention or sacrificing any of the attendant advantages thereof, provided, however, that such changes fall within the scope of the claims appended hereto.

The invention is hereby claimed as follows:

1. In a metal working press having a vertically reciprocating silde member driven by a crankshaft, a bearing assembly comprising a pair of spaced side members, a head on each of said side members, said head members being positioned to receive a crankshaft therebetween, each of said heads having a semi-circular recess there- 1n and a groove located in said recess, said groove extending substantially parallel to the sides of said head and located substantially midway therebetween, an individual bearing member in each of said recesses adapted to receive the ends of said crankshaft therein, an annular continuous rib centrally disposed circumferentially around each of said bearings and fitted into said groove,V

shaft, a bearing assembly comprising a pair of l spaced side members, a head on each of said side members, said head members being positioned to receive a crankshaft therebetween, each of said heads having a semi-circular recess therein, an individual bearing member in each of said recesses adapted to receive the ends of said crankshaft therein, interengaging means in each of said recesses and on each of said bearings, said interengaging means preventing axial shifting of said bearings in the respective recesses,

each of said bearings having an annular groove 6 therearound and located adiacent each end of said bearing and spaced from said interengaging means, and a pair of U-bolts each fitted into one of said grooves at the base of said U and anchored to said head at the free ends thereof.

EINAR K. J O-HANSEN REFERENCES CITED The following references are of record in the le of this patent or the original patent:

UNITED STATES PATENTS Number Name Date 449,046 Loveli Mar. 24, 1391 729,356 King May 26, 1903 1,632,462 Candee June 14, 1927 1,652,468 Catlin Dec. 13, 1927 1,868,817 Dunham July 26, 1932 1,960,166 Rode May 22, 1934 2,272,118 Imse Feb. 3, 1942

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