US1990270A

US1990270A - Brake drum refinishing tool

Info

Publication number: US1990270A
Application number: US333822A
Authority: US
Inventors: Edward W Denke; Frank E Bauerle
Original assignee: FRANK E BAUERLE
Current assignee: FRANK E BAUERLE
Priority date: 1929-01-21
Filing date: 1929-01-21
Publication date: 1935-02-05
Anticipated expiration: 1952-02-05

Description

Feb. 5, 1935. E, w. DENKE ET AL BRAKE DRUM REFINISHING TOOL a Sheets-Sheet 1 Feb. 5, 1935. E. w. DENKE Er AL BRAKE DRUM REFINISHING TOOL 3 Sheets-Sheet 2 Filed. Jan. 21, 1929 frzz'enih; Edward 14 p ale 6 Frazzlifiawr I zi 2227' Feb. 5, 1935.

E. W. DENKE ET AL BRAKE DRUM REFINISHING' TOOL Filed Jan 21, 1929 3 Sheets-Sheet 3 Patented Feb. 5, 1935 v m. v

UNITEDTSTATITES PATENT oFric BRAKE DRUM REFINISHING TOOL Edward W. Denke andFrank E. BauerIe PhiIaF 7 delphia,"Pa., assignors to said Frank E. Bauerle Application January21, 1929, Serial No. 333,322

- 11 Claims. .(01. 82-4) The principal object of this invention is to tapered bore E forthe "reception of the axle. provide an inexpensive and efficient portable The brake drum 0, in the present instance, com power-driven device for refinishing the brake prises a disk having a flange 0 provided with drums of ei'ther front or rear automobile wheels. brake-engaging lfaces c 0 adapted to been- 5 Another object of the invention is to construct gaged byan external brake band and internal "5 the device in such a manner that-a conventional brake shoes respectively. The brake drum C is type of electric drill may 'be utilized'to supply secured to the wheel, 'in.the present instance, :by the necessary power for operating the device. bolts F. r T

Another "object or the invention is to provide The refinishing device, made in accordance thedevice with means for preventing'chattering with the principles of our invention, comprises a 10 o'f' the-finishing toolduring the refinishing operapost 1 which is adapted to 'be axially aligned tion, thus making an' evenly finished face on the with the wheel and the'brake drum flange carried brake drum undergoing the refinishing operathereby. The post 1 is adaptedto be-centered tion. l with respect to the wheel and the-drum flange Another objectof the-invention is to construct by means of conical members .2 and 3 which 15 the device in sucha manner that it may be used are adapted to be seated in the opposite ends forfinis'hing either'an external or internal'brakeof the hub member D, in the circular openings engaging faceoi. the drum. formed therein by the axle-receiving bore 'E. 9

Another fea'tureof the invention is the provi- The post 1 is provided with an enlarged 'head sion df an automatically controlled feed for the 4 forming a circular shoulder 5 which rests on 99 finishing tool to insure an evensmooth face on a plate '7. Intermediate the -plat'e '1 and the the-drum. v conical member-2 is .provideda series of filler I Otherob'jec'ts and rith'e construction of the

deplates

8, 8 which are removably positioned on vice in detail will hereinafter be describedJeferthe post 1, in order that the device may be ap- 'encebe'ing had to the accompanying drawings, plied to various automobile wheels oi? which'the 25 of which: I lengths of the hub members D vary.

FigJ-lfis a=sideelevationof the device, showing The end of the post 1 is provided withscrew. the 'dev'ice appliedto an automobile wheel which threads 9 which, in the present instance; are has been removed'fromthe automobile; shown as being left hand threads, the purpose fifi l lan view taken on the line of which will be hereinafter described. "The screw 30 '2-' 2"o'f Fig. 1; r v threads 9 are adapted to receive a suitable secur- FigLB isa sectional'elevationtaken .011 the line 'ing nut 10 between which and the conical memi 2, andthowing the pp u l her 3 is located a suitablewasher 1'1.

p O-fi rearalltombilewheel; The deviceis adapted to be rigidly -=securedm "Fig. 4 is-a=sectional 'elevati'on taken on the the automobile wheelby tighteningthe -nut 10 85 lin 44 of F on the post 1, which drawsthe conical members is Sectional plan View .Wken on the 2 and 3 into firm contact with the opposite'ends m t-" 4; of the hub D, the shoulder 5 drawing :the mm 40 a m ma plan plates '7 and 8 tightly togetherland the nut 1.0 0 taken the'lme locking the whole rigidly to the wheel, 9.Obvi'- Fig. "7 is a Si'deelevation of a detail-of the ously the conical membersztand 3 automatically invention' I i center the post 1 with respect to the wheel as the Fig. 8 1s a sectional elevation illustrating .the but 10 is tightened on the Said post- 45 21 1222 11 123:23;: fi fi ifinfigfigt brake n r d 9912 5 to Fig.9 is a fragmentary sectional elevation that from whlch the w r r q e r s -th showing the'device applied-to'the iront"wheel or Post 1 prolects, 1S provldedmthen fin .2 zan-automobile l which is'of a lesser diameter than :thehead igand Fig. 1 illustrates an automobile wheel n as thus pr vi es a circular shoulder ifspn which having been removed from the automobile and S Sea-ted a disk disk. l nt ailly placed in a'horizontal position onsuitable blocks bored to reciVe the Circular 1 1 0 1 .1 d or trestles B, B with thebrake drum C facing is provided with a groove .15 which .isadaptedto upwardly. receivea key 16. The key :16 is seated partly *in "As shown in Fig. 3, the automobile wheel A the groove 15 and partly in a corresponding comprises the usual hub 'member Dhavin'g a groove 1'1 formed :inthe extension :-12.":By' this 56 a suitable washer 21 being interposed between.

the nut 20 and the disk 14 and extending beyond the periphery of the circular extension 12 and overlapping the said disk 14.

Rotatably mounted on the head 4 is a toolcarrying arm 25. The arm 25 is provided with" a hub 26 suitably bushed as at- 27. The hub 26 is positioned intermediate the supporting disk 14 and the plate 7, and is provided on its end adjacent the supporting disk 14 with a spur gear 27 which is secured to the said hub 26' by means of screws 28.

Axial movement of the hub 26 and arm 25 with respectzto 'the. head 4w-is; prevented by the plate 7 and disk 14,";however,:thespacingof the shoulders 5 and Y13 of the said spindle 4 :is such that the armr25 and its hub: 26 are permitted free rotation aboutlthel head 4 of the postl. Meshing with thegear27 is a pinion 30 which is..'secured 'to the lower end of'a vertically disposed shaft 31, under the disk 14. The shaft; 31 is rotatablytmounted in a bearing 32formed in the said disk 14.1 Secured, to the. opposite end ofthe shaft1131gand resting on the upper side of the disk14 is a spur gear 33. :The spur gear'33 meshes with apinion 34'which is: secured toone' endof a short I vertically disposed shaft '35. The shaft 35 is rotatably'mountedin the threaded projection 18;within a bushing 36 located in a suitable bore 37 formed within the projection 18. The upper end of the shaft '35 connected by meansof a flexible joint 37, to one end of a spindle 38. The shortshaft' 35, :the spindle 38 and the flexible connection 3'7 betweenythese two elements constitute a driving spindle by means of which-the device is operated. p R 7 qThe free end of the spindle 38 is adapted to bei'placed within ;and gripped by the chuck 3,9 of a convenientional typeof electric drill, such as that illustrated at 40. It willbeunderstood that the electric'drill comprises a" motor 41 which is adapted tojrotate the chuck 39, said motor being supplied with 1 electric current, from a suitable source of supply through a cable 42.

- In the present instance, the flexible coupling- 37, betweentheshaft 35andspindle 38, 'is in the form of,a tubecomposedjof 'rubberized fabric and is connected to theshaft 35 and spindle 36 at its opposite ends by bolts 43 and" 44 j respectively. Obviously any form-.of flexible connection between the shaft 35 and spindle 38 may be providedwithout departing from the invention, the flexible joint being provided for the purpose of obviating the nece'ssity of effecting absolute alignment between the shaft 35 and the spindle ofthe electric drill which carries and rotates the chuck 39, V v

A's shown inFig. 1, the electric drill is supported from the disk 14 by a pair of vertically disposed'standards.45. 45 which are-suitably secured in'the said disk 14. Adjustably mounted on the standards 45 are collars46, 46 respectively, which are adapted'to be'moved longitudinally of thestandards45-and to be secured in the positions to'which they a-re adjusted by means of set screws47...Eachof the collars 46 isprovided with a rod 48,on the up'per end'of which is formed alpair or .divergentuextensions 49. 49. f rmi g .2.

crotch 50 which is adapted to receive one of the

handles

51, 51 which project laterally from the electric drill 40.

With this construction, 'theelectric drill may be readily detached from the device for use independent of the device, by merely loosening the chuck 39 to release the spindle 38, whereupon the electric drill may be raised, removing the

handles

51, 51 thereof. from the crotches 50 in which they normally rest when the drill is being used in connection with the device forming the subject of our invention.

The tool-supporting arm 25 is provided on one of its faces with a dovetailed guideway 52 which extends longitudinally .of the arm and laterally with respect to 'the'supporting post 1. slidably mounted on the dovetailed guideway 52 is a tool-carrying carrlage53 which, in the present instance, is provided with a feed nut 55 adapted 'to receive'a feed screw 56. The feed screw 56 is rotatablymounted ina Plate 57 s cured to the outer end of the arm 25,'col1ars 58fand 59 being secured to the feed screw-56 for-preventing longitudinal movement of thescrew with respect to the arm 25. The collar 59 is-provided with a handle 60,, by means of which the; screw- 56 may; be rotated to move the carriage 53; longitudinally of the arm 25 for purposes hereinafter set forth.

Thehorizontally movable .tool-carryingcarriage 53 provided with a vertically disposed dovetailed guideway 61 which is adapted to receive and to guide a-vertically movable tool head 62, the said head being provided-with an undercut groove 63 which is adapted to engage the dovetailed guideway 61 on the carriage 53. a y

The tool head 62 is provided with a-laterally extending lug 64 in which is rotatably mounted a feed screw 65. The feed screw 65 is threaded into a correspondingly-threaded opening 66 formed in the carriage 53.

Collars

66 and 67 are secured to the feed screw 65 at opposite sides of the lug64 in order that longitudinal movement of the feed screw 65 willeflect a corresponding movement of the tool head 62 On the upper end of thefeed screw isa star 'wheel 68 having arms 69 which are adapted to be engaged by-a depending extension'lOof a horizontally disposed rod '71. The rod 71 is adjustably mounted ina lug 72 formed on a collar 73 which is slidably mounted ion-one of. the standards 45,

a set screw 74 being provided to retain'the collar 73 in the position to which it may be adjusted. A set screw 76 is'provided for retaining the rod '71 in its adjusted position with respect to the lug 72. This construction constitutes a dog for operating the feed screw 65. q I '1- l The lower end, of the tool head 62 is provided with a pairof diagonally disposed and intersecting grooves 77 and '78 respectively, either ofwhich is adapted to receive a suitable form of finishing tool 80.. 'A-jclamp 81 isip rovided to retain the tool within one of thetool-receiving grooves '77, ,78.

In Fig. 1,' the tool 80 is shown in the operation v of finishing, the external; brake-engaging surface 0 of the brake drum C, thesaid tool being located within thettoolj-receiving groove 77 and in Fig. 8

the finishingtool is shown-as operating upon the internal brake-engaging surface c the finishing tool 80 being located in the tool-receiving groove 78 in the head 62.

, The clamp plate 81 is'so disposed with respect' to the diagonally disposed grooves'77 and 78 that it will engage and hold the tool 80 within the occupied groove, regardless of which of the grooves this may be, a screw 79 being provided to draw the iclampplate 1-81 intoflrm ic'ontact with the finish- .ingitool-80. v I

, ilnroperationdiheidevicezisirigidly cl-ampedtosan 'zautoinobile wheelzinithetmanner #abovenoted, .the

' 5 'l'conical members 2iand:3;automatically centering 80 :around and in operative contact with :the' en *gaged brake-engaging surface of the flange :of 'the brake drum C.

Assuming that the operation :of the 'tool 80 .is started adjacent the outer edge :of the flange cl, eachrevolution of the :arm -will bring'one of the arms -69 "into contact with the dog IO- 71 (lit :which will, gradually feed the .tool across the brake=engaging surface with whichit .is in contact, toward the body of the'wheel A, it being understood that the :rotation of the arm 25 is-accomplished by supplying electric current to the :I1'l0170l41x0f theelectrioidrill 40, which through the .train 'ofgears 34', .33, 30:and -27 effects rotation of theiarm25 about the supporting post '1.

, 'In order to obviate any chattering of the tool 80 due tothe teethof therespective ,gears intermeshing -with each other, we have provided a means for steadying the arm 25 in its rotation about the post 1, said meanscomprising a brake adapted tolride in-an annular! groove 86-formed .inthe hub 2610f the arm 25, The brake 85 comprises a steel band -87 which is provided with a suitable lining (88 adapted to engage-the base surface 1890f the groove 86. One end of the steel band :87 :is provided with; a lug 9.0, through which tpasses-ar-stud 91 'which is secured-in the plate 7 by means'of a nut 92. The opposite endof the steel band 87 -is,provided with a lug 93 :having an opening -94, through whichproiects a threaded stem:95. The stem 95 has on oneof its ends a .yoke 96 \which spans the lug secured to the opposite end of the band, the stud .91 passing through the arms.97, 9fl-of the yoke.96 which respectively lie above .and below the .lug .90.

Adjustment of the brake bandt85 withrespect tothe hub.26isaccomplished by an adjusting nut '98 threaded .on the stemr95. .By this means the brake band .85 may be tightened or loosened to any desired extent with respect to the hub 26, suchtighteningtending to retard the rotation of -the arm'25'and thereby prevent the above mentioned chattering of the tool80.

Fig. 9 illustrates the deviceas being-secured to 'a'front-wheel of an automobile, the conemembers 2and 3being seated within the circular cavities G in which the racesof the ball or roller bearings of the front wheels normally rest, the operation .of the device being thesame regardless of whether the device is applied to afront orarear wheel.

Obviously conical elements of various sizes may be'used in applying the device to different wheels wherein the diameters of the opening at the opposite ends of the wheel hubs vary to any marked degree.

The left 'hand screw threads on 'thepost l are provided so that as the-arm 25 is :rotated and the tool 80 offers resistance tossuch rotation, this resistance being transmitted to the :disk .14 will tend to tightenthe post in the wheel rather'than loosen thesamawhich would be theloase event ofithe threadse:being rightihanded.

Obviously other terms :o'f'power units may be employed in place :of the eiectric drill, shown-{in the :drawings, :without departing from the main -features of'the invention.

"We claim:

l. A portable device, for refinishing the brake.

engaging surfaces of brake drums on 'automobile wheels, comprising a post adapted to be secured .to the automobile wheel, meansfor-axially aligning said post with said wheeland'the brake :drum concentrically disposed thereon, a

tool-supporting element rotatably mounted 'on porting element for preventing chattering of the tool in 'its'movement relative to'said brake drum. l

2. Apdrtable device, for refinishing the brake engaging surfacesot'brake drums on automobile wheels, comprising a postadaptedto be secured totheautolnobile wheel, meansfor-axi'ally align ing said post with said wheel, and ithebrake drum concentrically disposed thereon, a tool-support ing element rotatably mounted on said post, a tool carried by said tool supporting element, means for rotating said tool-supporting element about said post with saidtoolinengagement with a brake-engaging surface of said drum, said means including a conventional form of electric 4 drill which comprises aspindle-receiv'ing chuck and a motor adapted for'rotating saidchuck, said device comprising a driving spindle operatively connected to the tool-supporting element and adapted to be detachably gripped and rotated by the chuck of said'electricflrill. Y

' 3. A portable device, forrefinishing the brake engaging surfaces of brake drums on automobile Wheels, comprising a post adapted "to be secured to the automobile wheel, means for-axially aligning said post with said wheel'and'the brake drum concentrically disposed thereon, a tool-supporting element rotatably mounted on said post, a tool carried by said tool-supporting element, means for rotating said tool-supporting element about said post with said tool in engagement with a brake-engaging surface :of said drum, said "means including a conventional form of electric drill which comprises a spindle-receiv ing chuck and a motor adapted for rotating said chuck, said device comprising a driving spindle operatively connected to the tool-supportirigelement and adapted to be detachably gripped and rotated by the chuck of saidelectric drill, and means carried by said post for remov'ably supporting said electric drill on thedevice.

4. A portable device, for refinishing'the brake engaging surfaces of brake drums-on automobile wheels, comprising-a post=adapted to be secured to the automobile wheel, means'for axiallyaligning said post with said wheel and the-brake drum concentrically disposed thereon,'a tool-supporting element rotatably mounted on said post, a

tric =drill which comprisesve spindle-receiving :chuck and ;a motor :adapted :for c-rotating .s'aid vengaging surfaces of brake drums on automobile chuck, said device comprising a driving spindle operatively connected to the tool-supporting elementand adapted to, be detachably'gripped and rotated by the chuck or said electric drill, said driving spindle including a flexible connection permitting relative misalignment 'between'said electric drill and the remaining elements of the device, and means carried by said post for removably supporting said electric drills on the device.

5. A portable device, for refinishing the brake wheels, said wheel including a hub having a circular opening extending longitudinally therethrough, comprising a post adapted to pass through said hub opening and to be secured to the automobile wheel, means for axially aligning said post with said wheel and the brake drum concentrically disposed thereon, said aligning means comprising a pair of conical elements disposed in opposed relation to each other on said post with theirbeveled sides respectively seated in the said circular opening at the opposite ends of said hub,

a shoulder formed on said post at the outer end of one of said conical elements,anut threaded on said post at the outer end of oppositely dis posed conical element for drawing said conical elements into said circular opening and thereby centering said post relative to said wheel, spacer plates on said post between said shoulder and adjacent conical element, a tool-supporting element rotatably mounted on said post, a tool carried by said tool-supporting element, means for rotating said tool-supporting element about said post with saidtool in engagement with a brake-.

engagingsurface of said drum, and a brake engaging said tool-carrying element and anchored to one of said spacer plates for preventing chattering of the toolrelative to the brake drum.

6. A portable device, for refinishing the brake engaging surfaces of brake drums on automobile wheels, comprising a post adapted to be secured to the automobile wheel, means for axially aligning said post with said wheel and the brake drum concentrically disposed thereon, a tool-supporting element rotatably mounted on said post, a tool carried by said tool-supporting element, means .for rotating saidtool-supporting element about said post with said tool in engagement with a brake-engaging surface of said drum, said means including a conventional form of electric drill which comprises a spindle-receiving chuck and a motor adapted for rotating said chuck, said device comprising a driving spindle operatively connected to the tool-supporting element and adapted to be detachably gripped, and rotated by the chuck of said electric drill, means carried by said post for removably supporting said electric drill on thedevice, said means comprising a disk secured to said post, standards on said disk, and crotch ends on said standards adapted .to receive the handles of said electric drill which extend laterally from said electric drill.

7. A portable device, for refinishing the brake engaging surfaces of brake drums on automobile wheels, comprising a post adapted to be secured to the automobile wheel, means for axially align-. ing said post with said wheel and the brake drum concentrically disposed thereon, a tool-supporting, element rotatably mounted on said post, a tool carried by said tool-supporting element, means for rotating said tool-supporting element about said post with said tool in engagement with a brake-engaging surface of said drum, said means including a conventional form of electric drill which comprises a spindle-receiving chuck the handles of, said electric drillwhich extend laterally from said electric drill, and means for adjusting said crotch ends relative to standards to accommodate various conventional types of electric drills. 1

8. A portable device, iorrefinishing'the brakeengaging faces of brake drums on automobile wheels, comprisingapost adapted to be secured to andaxiallyaligned withsaid wheel and the brake drum concentrically disposed thereon, a tool-carrying arm rotatably mounted'on said post, a tool carried by said arm'and adapted to engage a brake-engaging surface of said brake drumja disk rigidly secured to said post, means on said disk for supporting a conventional form of electric drill which comprises a motor'and achuck rotated by said motor, a drivingspindle rotatably mounted at one'oftits ends in said post, its opposite end being adapted to be gripped and rotated by said chuck, a pinion secured to s'aiddriving spindle adjacent said disk, a fiexible connection included in said driving spindle between said pinprising a post arranged topass through a central opening in the hub of thewheel, a tool-carrying arm rotatably mounted on the post, an element rigidly secured tox the'post and forming a shoulder at one sideof the arm to prevent movement of the arm in one direction longitudinally of the post, a bearing plate on the post at the "opposite side of the arm providing a shoulder to prevent movement of the arm in the opposite direction longitudinally of the post, a pair of conical elements adjustable longitudinally on the post and arranged to beseated respectively in the opposite ends of the hub opening to vary the position of the post and consequently the plane of rotation of the arm relative to the plane of the wheel and to center the post relative to the drum, a plurality of readily detachable filler plates on the post between one side of one of said conical elements and the bearing plate .to rigidifythe opening in the hub of the wheel, a tool-carrying arm rotatably mountedon the post in a fixed position longitudinally of the post, apair of, conical elements adjustable longitudinally on the post and'arranged to be seated respectively in the opposite ends of the hub opening to vary the position of the post and consequently the plane of rotation of the arm relative to, the plane of the wheel and to center the post relative to the drum, a motor support rigidly secured to the post above the arm and preventing movement of the arm in one direction longitudinally of the post, means on the post below the arm preventing movement of the arm in an opposite direction on the post, a motor carried by said support in fixed relation to the post and operatively connected to the arm for rotating the same around the post, a tool carriage slidably mounted for movement on the arm radially with'respect to the post, a tool head slidably mounted on the carriage for movement transversely of the arm and parallel to the post, a tool carried by said head for engagement with the drum, and means for automatically feeding the tool and. tool head in said direction parallel to the post upon each revolution of the arm about the post. i

11. A portable device for refinishing a brake drum on an automobile Wheel, said device comprising a post arranged to pass through a central opening in the hub of the wheel, a tool-carrying arm rotatably mounted on the post in a fixed pothe post and arranged to be seated respectively in the opposite ends of the hub opening to center the post relative to the drum, a motor support rigidly secured to the post above the arm and preventing movement of the arm in one direction longitudinally of the post, means on the post below the arm preventing movement of the arm in an opposite direction on the post, a motor carried by said support in fixed relation to the post and operatively connected to the arm for rotating the same around the post, a tool carriage-slidably mounted for movement on the arm radially with respect to the post, a tool head slidably mounted on the carriage for movement transversely of the arm and parallel to the post, a tool carried by said head for engagement with the drum, and means for automatically feeding the tool and tool head in said direction parallel to the post upon each revolution of the arm about the post.

EDWARD W. DENKE.

FRANK E. BAUERLE.