ZÚI Zilver/Bg, by E Ef / R" , If
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March 17, 1931. J. w. EMERICK ET AL 1,796,889 EXCAVATING MACHINE Filed Nov. 26, 1928 2 Sheets-Sheet 1 NN INVENTOR ZÚI Zilver/bg, BY E Ef / r" , if ATTORN EYS Marchy 17, 1931. J. w. EME-RICK ET AL 1,796,889 EXCAVATING MACHINE Filed Nov. 26, 1928 2 Sheets-Sheet 2 // INVENTOR A / ATTORNEYS Patented Mar. 17, 1931 ` ` _ 1,796,889 UNiTED STATES PATENT ÜFFICE JOHN W. EMÉRICK AND WILLIAM E. EMERICK, OF HALFWAY, MICHIGAN . EXCAVATING MACHINE Application ñled November 26, 1928. Serial No. 321,889. The present invention pertains to a novel Fig. 5. The shaft carries a rather large ring mechanically operated excavating device, gear 12 for a purpose which will presently ap and the principal object is to provide a con~ pear. Legs 13 hang from the platformand struction of this character embodying the carry a pair of longitudinal bars 14 between 5 advantages of portability, reach, control and which are journalled rollers 15. An endless 55 simple construction. apron 16 is trained over the rollers to com The device consists essentially of a truck on plete a conveyor which is driven by a motor which are mounted a base member and a plat 17 geared as at 18 to one of the rollers. form in such a manner as to permit the latter The platform also carries a pair of posts 19 10 to turn in a horizontal plane and tilt at a ver at the intermediate points of the transverse 60 tical plane under control. The platform edges thereof. In these posts is slidably supports a slidable rack bar and operating mounted a bar 20 having rack teeth 21 on the gear therefor, the rack bar in return carrying lower edge thereof. The forward portion of the bucket or shovel. rlÍhe aforesaid gearing the bar is channelled at 22 to receive a carrier 15 is such that the bar and shovel may be slid bar 23 slidable therein. T o the >forward 65 in either direction, and the control members end of the bar 23 are pivotally mounted the for this operation as well as for the various - scoops 24 of a bucket or shovel. Scraper other movements of the device are located members 25 are fixed to the forward end of within convenient reach of the operator. the bar 23 for scraping the walls of the scoops 20 The invention is fully disclosed by way of as the latter turn on their pivot. The scrap 70 example in the following description and in ers are longitudinally supported by braces the accompanying drawings, in which 26 asrclearly shown in Figs. 1 and 2. The Figure 1 is a side elevation of the machine; scoops 24 are moreover joined to straps 27 Fig. 2 is a front end View of the bucket; on the bar 20 by means of links 28. The re |25 Fig. 3 is a section on the line 3-3 of maining end of the rack bar 20 carries a coun Fig. 1; _ ter-balance weight 29. ' ` Fig. 4 is a section on the line H of Fig. 1; On the platform 11 are mounted two pairs and ' of upright bearings 30 which support a pair Fig. 5 is a plan view. _ of parallel shafts 31. These shafts carry 30 Reference to these views will now-be had by like gear and clutch mechanism, and only 80 use of like characters which are employed to one set, therefore, need be described rin de designate corresponding parts throughout. tail. Directly-beneath the rack bar 20, each Y In Fig. 1 the device is shown as including a shaft carries a loose sleeve 32 with a pin truck comprising a pair of triangular frames ion 33 thereon meshing with the rack 21. 35 1 supported on wheels 2 adapted to rideon a One end of the sleeve is equipped with >the 85 track 3. The tops of the frames 1 support a cup 34 of a cone clutch member. Adjacent rotatable transverse shaft 3’ havingbrackets theksleeve 32 is a larger sleeve 35 carrying 4 fixed to the ends thereof.` The brackets the cone 36 of the clutch member and adapted carry a base member V5 and one end of the to cooperate with the cup 34. rThe other end 40 shaft is further equipped with a worm gear of the sleeve 35 carries a gear 37, and the two 90 6 meshing with a worm 7 journalled on the gears are interengaged with each other, so adjacent frame 1 >and having an extended that they will turn the corresponding pin shaft 8 equipped with an operating crank 9. ions 33 in opposite directions when the By means of this mechanism, the base mem clutches are engaged. The gears, however, 45 ber 5 and parts carried thereby may be tilted are driven from a motor 38 mounted on the 95 vertically as will presently appear. platform and having on its shaft 39 a pin ' A stub shaft 10 journalled vertically in the ion 40 meshing with one of the gears 37. center of the fixed member '5 supports a main This motor is controlled from a switch box platform 11 which is nearly as Wide as the 41 adjacent thereto. ' 50 space betwen the side frames 1, as shown in The bearings 30 adjacent the edge of the f. 2 1,796,889 base 11 are slotted obliquely and oppositely mits the other clutch to work loose, so that one as indicated by the numeral 42. In each of of the beveled gears 56 is positively turned. these bearings is mounted a short sleeve 43 lnasmuch as these pinions are geared to turn on the shaft 3l, and from this sleeve projects in opposite directions, the direction of rota a pin 44 into the slot. Each short sleeve is tion of the stub shaft 50 and hence the plat 70 fixed to a crank arm 45 as shown more clearly form ll is 'determined by the operation of the in F ig. l, and the two arms are joined by a clutch mechanism. link 46. An operating lever 47 is fulcrumed The carrier barV 23 is slidable independently on the platform and has an intermediate of the rack bar 20, and is formed with rack 10 point 48 attached to the link 46. Ít will be teeth 75 on its upper edge. lll‘he channel por 75 apparent now that movement of the lever tionA 22 of the bar 20 carries a >pair ofshort will engage one or the other of the clutches bearings7 6 in which is journalled a shaft and disengage the other clutch, and inasmuch 77 disposed over the rack teeth 75 and carry as the other clutch is controlled opposite the ing a pinion 78 meshing with these teeth. A 15 turning pinions 33, the direction of the bar bracket 79 is also secured to the forward por 80 20 is thus governed. tion of the bar 2O for the purpose of support This clutch mechanism, as well asfother ing a motor 8O geared by a drive 8l to a clutch mechanisms presently tobe described, sprocket 82 on the shaft 77; The conductor are shown merely for the purpose of illus 83 for supplying the current to the motor tration; and it will be understood that the extends to a controller 84 mounted on--the 85 invention contemplates the use of any par platform in close proximity to the levers 44 ticular style of clutch that may be desired. and 69. ' The platform supports a vertical stub shaft In the operation of the device, the motor 38 50 on the lower end of which is secured a may be permitted to turn constantly, inas 25 pinion 5l meshing with the ring gear l2. much as it is ineffective on the pinions 33 and 90, “Then this shaft and pinion are turned by 5l unless the clutches are set. It will be ap the mechanism presently to be described, the parent that the rack bar 2O and hence the platform ll and bucket mechanism supported bucket is moved towards or away from the thereby are turned in a vertical plane to the material by turning the lever 47 to operate 30 extent permitted by the spacing of the frames one or the other of the clutches 34-36. The 95 l from the longitudinal edges of the plat lateral and vertical adjustment of the bucket form. is made by tilting the platform through the On the platform is mounted another pair crank k9 and associated gearing and by turn of uprightV bearings 52 at opposite sides of ing the platform in a horizontal plane the bar 2O for supporting a shaft 53. The through the gears l2 and 5‘1 in the manner 10.0 shaft is surrounded by two short sleeves 54 stated. The scoops 24 are caused to bite by each carrying at one end the cup 55 of a. cone operating the motor 80 from the controller clutch and at theother end a beveled pinion 84 to retract the carrier bar 23, whereupon-the 56 resting on a beveled pinion 57 carried by links 28 cause the scoops to close. To com 40 the vertical stub shaft 50.' Adjacent the pensate for this retraction of the scoops, the 105 sleeves 54, the shaft is surrounded by other rack bar 2O is caused to move forwardly. As sleeves 58V carrying the cones 59 ofY the the scoops are drawn to open` position by re clutches.