US1628957A - Brake shoe - Google Patents

Description

May 17 1927. 1,628,957

A. Y. DODGE BRAKE SHOE Filed Oct. 4, 1926 INVENTOR ADIBEYLY DODGE ATTORNEY Patented May 17, 1927.

UNITED STATES- 1,628,957 PATENT oer-Len;

ADIEL Y. DODGE, OF SOUTH BEND, INDIANA, ASSIGNOR TO BENDIX BRAKE COMPANY,

OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BRAKE SHOE.

Application filed October 4, 1926.. Serial No. 139,388.

This invention relates to brakes and is illustrated as embodied in an internal expanding-automobile, brake. An object of the invention is: to provide a novel construction of the shoe or shoes used in the brake, especially (in. providing constructions suitable for] use in brake shoes made ofsteel stampings. 1 V

Aino fr he .features of novelty which add to the utility of theseishoes, especially when they are made of stalnpings, are an arrange nient-of a U-section thrust member at one end of the shoe having its sides fitting between and secured to spaced stiffening webs forming part of the shoe; novel pivot bushings having flanges and retainers arranged to grip opposite faces of the parts of the webs forming. the pivot arms of the shoe; and a shoe construction including, a segmental cylindrical outer band reinforced by spaced members secured to its inner face and forming a pair of arcuate webs so arranged as to give a generally channel-shaped shoe. Preferably these spaced stiffening members have narrow outer cylindrical flanges engaging axidsecured to the inner face of a i band vadjacent its side edges and preferably 'flu'sh at their outer= edges'withrthe side, edges of the band, 7 I

The above and other objects and, features ofv the invention, including various novel and desirable details of constructiomwill be apparent from the following description of one illustrative embodiment shown in the accompanying drawings, iii-which:

Figure 1 isia vertical section through the brake, just inside the head-of the brake drum, showing the novel brake shoes in sideelevation;

Figure 2 is a partial section on the line 2-2 of Figure 1, showing the anchorages of the shoes;

- Figure 3 is a section through the central shoe on the line 33 of Figure 1;

Figure 4 is a section through one of the end shoes on the line H of Fi ure 1; and

Figure 5 is a partial inside Tan view of one of the end "shoes on the 'ne 55 of Figure 1.

In a general way, the brake selected forillustration includes a rotatable drum 10 closed at its 0 )en side by a suitable stationary backing etc or equivalent support 12 and within w ich are arranged three brake shoes 14, 16, and 18. Shoe 14 is anchored on a pivot 20 carried by backing plate 12, ands oe 16 is anchored on apivot22 also carried by the backing plate Shoe, 18' is connected to the unanelioredend of shoe 16 by a suitable floating ivot 2d. The brake is applied by means sue as-a double cam 24 forcing the shoes ".14, and 18 apartagainst the; drum a 'ainst thegresistance of a return spring 28, w iereupongshoe 18. ap lies' shoe 16 against the resistance. of an auxi iaryneturn spri'ng30. Y I y The present invention relatesto the con-.. struction of the brakeshoes, the general organization of the brake being substa'nshown asbeing channel shap'ed to provideinner. stiflz'ening flan es {LO andaouter flanges 42vwh1ch en age, an are secured tojthe-inner face of the band 32 adjacent its sidq edges. Preferably flanges 42- are flush at'theirouter edges with the sideedges; of the band 32. If preferred, the stampings may-be brought somewhat closer together atthe end of each of the shoes next the 02111126 or; its equivalent so that they are spaced apart the proper distance to receive the side portions of; a U.-

secured to the stampings. v

At the pivoted endsiof the shoes 14 and 18 the stampings are shown projecting beyond the ends of the bands 32 to form spaced pivot arms which preferably converge to positions immediately adjacent the opposite sides of the shoe 16 (see Figure 2).- Each of the pivot arms formed by the projecting and inwardly ofiset end of one of the stampings is provided with a pivot bearing shown as a bushing having a flange 46. engagingone section thrust member 4A fitting-.betweena-nd face of the stamping and a'bearingportion l8 extendin through an opening in the stain mg on on which is sleeved a retainin mem er 5O engaging the opposite'face of the stamping and held by spinning or distortng the end of the bearing portion 48 over its outer face at 52 to form an integral rivet 7 bers, each in connection, The pivots 20 end 24 are received in the bushings thus formed.

The shoe 16 is shown .as built up of a. segmental cylindrical band 54 shown as carryi the liningfib end which is reinforced, y two L-section stampings 58 spotwelded or otherwise secured... back to. back and secured to the inner face of the band 'The stampings have inner stifieningflanges 60 corresponding to the flanges 40 and outer flanges 62 which are preferably flush at their outer edges with the op osite side edges of the band 54. At-its'en where it receives the ivots' 22 and 24, the shoe is formed with wings for those pivots each including a '-bushing' 64- having a flange 66,

' ng agi'ngone face of the stifienin' web inadenp of thetwo stem 'ings,-and' evin a bearing portion 68-whic prqects throng an. opening iii-the web and on; which is sleeved a retaining member'- 170: engaging the opposite faceof theweb; and held by an integral rivet poi-M01172.-

fitting bet-ween and secured to the inner facesojfsai'd portions.

"2; -'A channfel-shaped brake shoehaving 's'pced side flanges in combination witha. section-thrust member havmgit sides fittingbjetween and-secured to -the inner laces ofsaidgortions-at one endof-the'shoe,

3. A rakexshoe built up ofthree principal arts vizza, segmental cylindrical outer ban an a, pair of spaced 'stifiening -me1nc uding. an arcuate web portion and enarr'ow cylindrical flange engaging ,and secured to the 'innerlface of the band adjacent one of its 'sideedges; Y

4. A brake shoe built up of three princi- I pal pnrts, viz: a segmental-l cylindrical outer band, and a pair of spaced channel-section stiffening members, each including an .er band, and a. pair of spaced stiffening members, each inclndin an arcuate web portion and a narrow cylindrical flange engaging and secured to the inner face of the band adjacent one of its side edges, said stifienin members extending beyond the end of the band as spaced pivot arms 0th. lset substantially within the curve of said bend. i

6. A brakeshoe having .at its'end a stifi ening web formed withnn openin in combination with a pivot bushing having a flange engaging one face of the web and a bearing portion projecting through the opening,'-'nnd e reinforcin and reteining member sleeved on said lien-ring portion and engaging the opposite face of the web.

7.- A briike shoe having at its end a pair of spaced stiifening webs formed with coaxial openin s in combination with a pair o'f-pivot bnsrings having flanges engaging the faces of the webs and bearing portions projecting through the openings, and rcin forcing and retaining members sleeved on said hearing portions and engaging the opposite facesof the webs.

8. A brake shoe having at its end a pair of spaced stiffening webs formedwvith c0- a'xial openin s incombinntion with a pair of pivot bus rings having fienges engaging the feces o-f'the webs and bearing portions projecting through the openings, and reinforcing ancbretaiu'ing members sleeved on said l Jearing portions nnd'engagin the opposite faces of the webs, the end-oi the bear ing portion being displaced over the outer face of theretaining-member to hold it in place. 7

' Intestimony whereof, l have hereunto signed my name.

ADIEL Y. DODGE.

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