US1366741A - Mechanical digger - Google Patents

Description

M, L HELLER. MECHANICAL-519G653. APPLICATION FILED we. 11, 1919.

Pat emed Jan. 25, .1921

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M. L. MILLER. MECHANICAL BIGGER. APPLICATION HLED AUGJI, 1919.

Patented Jan, 25, 1921.

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Patented Jan. 25, 1921.

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M. L. MILLER.

MECHANICAL BIGGER. APPLICATION FILED AUG.II, I919.

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ATENT oFFICE.

MARINUS LESLIE MILLER, 01E SOUPABAYA, JAVA.

MECHANICAL BIGGER.

Specification of Letters Patent.

7 Patented "912111.25, 1921.

Application filed'August 11, 1919. Serial No. 316,909.

T 0 all whom it may concern:

Be it known that I, Mamwns Lnsmn MILLER, a subject of the King of Great Britain, residing in Sourabaya, Java, have invented certain new and useful Improve ments in Mechanical Diggers of which the following is a specification.

This invention relates to mechanical diggers and it has for its object certain improvements in such diggers designed to secure their more efficient operation.

The invention further provides an improved form of spade for use in mechanical diggers, and means for emptying or clearing the earth from said spades.

In order that the invention may be the hotter understood d *awings are appended in which Figure 1 is a side view of a digger embodying the present improvements.

Fig. 2 is a plan.

Fig. 3 is a side view of one of the spades showing the arrangement of the clearing mechanism.

Fig. 4% is a plan showing two spades respectively at the end of their rear and forward strokes.

Fig. 5 is an end view of the spade shown in Fig. 3.

Fig. 6 is a side view of a spade with the operating mechanism therefor.

Fig. 7 is a View showing diagrammatically one complete cycle of movement;

In the accompanying drawings the inven tion is shown as applied to a motor driven machine, and in which drawings while the whole machine is illustrated only such parts thereof as are essential to the proper understanding of the invention are identified and will be described.

Referring to'the drawings 1 indicates the frame of the machine formed of channel iron, tapering somewhat toward the front of the said machine, said frame being sup-' ported by means of driving wheels 2 and asteering wheel 3 locate d in the front of the machine. The machine is driven by means of a motor indicated generally by 1, mounted in any convenient manner upon the frame 1, a

suitable gear box being provided 5 to the main shaft e of which the motor is coupled.

7 indicates a shaft which may if desired be coupled directly to the engine shaft and 8 indicates a second shaft connected to shaft 6, the gearing in box 5 being so arranged that only'one of the shafts 7 and 8 can be driven at the same time. 9 indicates a differential gear ope 'ated by bevel wheels, 10, 11, respectively secured to shaft 7 and to the shaft 12, operatedthrough the differential gear, the shaft 12 serving to give backward or forward motion to the driving wheels 2.

Disposed at the bacl: of the machine and supported by the frame 1 of the machine is the digging mechanism comprising eight arms 13 pivotally mounted at their lower ends upon the main. shaft 1% supported by the frame of the machine;

As will. be seen on reference to Fig. 2 three of the arms 13 upon each side of the machine are connected at their upper ends by means of a rod 1 the two center arms 13 being connected by a rod 13". Pivotally connected to the upper ends of the center of the three arms upon each side of the ma- 1 chine are bars 15 formed of channel iron. A

similar bar 15 is provided for the arms in the center of the machine. The bars-at their inner ends are secured together and have attached to them a nut 16 engaging a screw.

17 mounted in a suitable frame and operable by means of a hand wheel 18. By this means the arms may be swung in either one or other direct-ion to advance or withdraw the digging mechanism.

The main shaft lat before referred to is driven by means of the bevel pinion 19 engaging the smaller pinion 20 which latter is keyed to shaft 8. Secured to shaft 1 1 are two pinions 21, 22, en aging the toothed, wheels 23, 24, formed in two parts secured to a 6 throw crank shaft 25 supported by bearings formed in the aforesaid arms 13.

Also secured to the shaft 25 are chain wheels 26, 2?, made in two parts sccuredtogether in any convenient manner. The chain wheeis drive other chain wheels 29. formed in one piece with or secured to other chain wheels 30, 31, whereby power is trans mitted from wheels 26, 27, to shaft 12 11 30.11 which are mounted free chain wheels 3%. Thus when siiaft 12 is ingear with shaft 7 the chain wheels 33. 3st, remain stationary.

Freely mounted upon shaft lei carrying the aforesaid. arms 13 are otherarnis 35 the i right and the other left hand, each spade upon the discharge side having upon the underside a web 38 while'upon the other edge a web 39 is provided upon the upper surface of the plate.

The spade at theupper end is provided with 'a plate 4:0 shaped as shown, and pivotally connected at 41 to a plate 42 at the upper end of the blade of the spade. 43 indicates a rod pivotallyconnected at its outer end to the plate 40 and at its opposite end connected to a collar L4 sliding freely upon the rod 45 supported at its end in bracket- s 46, 46 ,'secured to the rod or shaft 36 of the spade. 47 indicates a spring connected at one end to the plate 40 and at the otherto an arm upon the bracket 46 and by means of which springas will be hereinafter more fully explained the plate 40 is returned to its brought into or normal position after being operated to clear the earth from the spade.

Sliding freely upon rod is a slipper L8 to which is connected the outer end of a rod as which rod at its inner end is provided with strap 50 surrounding a grooved collar 51' secured to the crank shaft 25.

13 indicates an extension of the arm 13 at the lower end of which is 'revolubly mounted a disk 53 adapted to contact with the ground and so start the trench.

The action of the parts just above de-' scribed is as follows 2+ Assuming a spade to be in its lowest position, as the crank acts to raise the spade the sliding collar 44: to which plate 40 is connected comes into contact with the slipper 48 connected to rod 49 whereby the plate 40 is caused to sweep across the spade being at the end of the up stroke in the position shown to the left of Fig. 4c the earth being discharged upon the right hand side of the spade the plate 40 being retained at the side of the spade by means of the spring f.

:Thepath of the spade during one complete rotation of the crank shaft is shown in Fig. 4 the distance between the horizontal lines a; showing the depth of the trench.

laims.

1. In a digging machine a plurality of crank actuated, spades, means for clearing the earth therefrom mounted .upon said spades said clearing means being caused to sweep across the spades during the upward movement thereof and to project the earth to one side means for propelling the machine and-operating the spades and means whereby the spade V mechanism may be thrown out of epcration.

2. In a digging machine a plurality of crank actuated spades, plates pivotally mounted upon said spades, means for operating saidplates whereby they are caused to sweep. across the upper surface thereof during the upward movement thereof and to .project the earth to one side,-means for pr0- rods pivotally mounted upon acey 1 pelling the machine and operating the spades, and means whereby the spade mechanism may be brought into or thrown out of operation.

3. In a digging machine a plurality of spades, a crank shaft having a plurality of cranks to which the spade shafts are connected, guide bars mounted upon the spade shafts, slippers upon said guide bars, rods connected at one end to the crank shaft and at the other to the slippers, bosses slidablc on the guide bars, plates pivotally mounted upon the blades, springs operating to move the plates in one direction, rods connecting the plates with the bosses, means for propelling the machine and operating the spade mechanism and means whereby the spade mechanism may be brought into or thrown out of operation.

a. In a digging machine a plurality of spades, a crank having a plurality of cranks to which the spade shafts are connected, guide bars mounted upon said spade shafts, slippers uponsaid guide bars, rods pivotally connected at one end to the crank shaft and at the other to the slippers, bosses slidable on the guide bars, plates pivotally mounted upon the upper ends of the'blades, springs operating to move the plates in one direction, rods connecting thev plates ,with the bosses whereby the plates are operated against the action of the spring, linkscontrolling the radial movement of the spades, means for propelling the machine and 'opcrating the spades, and means whereby the spade mechanism may be brought into or thrown out of operation. i

5. In a digging machine a shaft, brackets pivotally supported on said shaft, a crank shaft supported in said brackets having a plurality of cranks, a plurality of spades to which the crank shafts are connected, guide bars carried by supports mounted on the spade shafts, slippers upon said guide bars, said crank shaft at one end and at the other connected to the slippers, bosses slidable on the guide bars, angle plates pivotally mounted at the upper 'endsof the blades ofYthe spades, springs connected at one end to one of the supports of the guide bars and at the other to said angle plates a screw operated body, links connected at one end to said body and at the other to the swinging brackets carrying the crank shaft, means for operating saidscrew to rock said swinging members, J means for propelling the machine and operating the spades, and meanswhereby the spade mechanism may be brought into or thrown outof operation.

6. In a digging machine a shaft, pinions thereon, brackets swingingly mounted on said shaft, a crank shaft carried by said. swinging brackets, pinions on said crank shaft engaging the pinions on the driving shaft, chain wheels on said crank shaft, other chain wheels on the driving shaft,

' chains passing around said chain wheels,

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other chain wheels connected to said latter wheels and clutched to the said driving shaft, a shaft operating the driving wheels of the machine, chain wheels clutched to said shaft, a chain whereby motion is transmitted from the chain wheels clutched to the driving shaft, a motor, a gear box, a shaft driven through the said gear, a second shaft also capable of being driven by said gear, means for driving either shaft at will, a bevel wheel upon the first shaft a bevel wheel engaged by said first bevel wheel upon the driving shaft, a bevel wheel upon the second shaft, a bevel wheel engaged thereby upon the shaft operating the driving wheels, spades operated by the crank shaft, and spade clearing means upon said spades.

'7. In a digging machine a shaft, pinions thereon, brackets swingingly mounted on said shaft, a crank shaft carried by said swinging brackets, pinions on said crank shaft engaging the pinions on the driving shaft, chain wheels on said crank shaft, other chain wheels on the driving shaft, chains passing around said chain wheels, other chain wheels connected to said latter wheels and clutched to the said driving shaft, a shaft operating the driving wheels of the machine, chain wheels clutched to said shaft, a chain whereby motion is transmitted from the chain wheels clutched to the driving shaft, a motor, a gear box, a shaft driven through said gear, a second shaft also capable of being driven by said gear, means for driving either shaft at will, a bevel wheel upon the first shaft, a bevel wheel engaged by said first bevel wheel upon the driving shaft, a bevel wheel upon the second shaft, a bevel wheel engaged thereby upon the shaft operating the driving wheels, spades operated by the crank shaft, plates pivotally mounted upon said spades adapted to sweep across the upper surface thereof and to project the earth to one side.

8. In a digging machine a shaft, pinions thereon, brackets swingingly mounted on said shaft, a crank shaft carried by said swinging brackets, pinions on said crank shaft engaging the pinions on the driving shaft, chain wheels on-said crank shaft, other chain wheels on the driving shaft, chains passing around said chain wheels, other chain wheels connected to said latter wheels and clutched to the said driving shaft, a shaft operating the driving wheels of the machine, chain wheels clutched to said shaft, a chain whereby motion is transmitted from the chain wheels clutched to the driving shaft, a motor, a gear box, a shaft driven through the said gear, a second shaft also capable of being driven by said gear means for driving either shaft at will, a bevel wheel upon the first shaft, a bevel wheel engaged by said first bevel wheel upon the driving shaft, a bevel wheel upon'the second shaft, a bevel wheel engaged thereby upon the shaft operating the driving wheels, spade shaft connected to the cranks of the crank shaft, guide bars mounted upon the spade shafts, slippers upon said guide bars, rods connected at one end to the crank shaft and at the other to the slippers, bosses slidable on the guide bars, plates pivotally mounted. upon the blades, springs operating to move the plates in one direction and rods connecting the plates with bosses.

9. In a diggingmachinc a shaft, pinions thereon, brackets swingingly mounted on said shaft, a crank shaft carried by said swinging brackets, pinions on said crank shaft engaging the pinions on the driving shaft, chain wheels on said crank shaft, other chain wheels on the driving shaft, chains passing around said chain wheels, other chain wheels connected to said latter wheels and clutched to the said driving shaft, a shaft operating the driving wheels of the machine, chain wheels clutched to said shaft, a chain whereby motion is transmitted from the chain wheels clutched to the driving shaft, a motor, a gear box, a shaft driven through the said gear, a second shaft also-capable of being driven by said gear, means for driving either shaft at will, a bevel wheel upon the first shaft, a bevel wheel engaged by said first bevel wheel upon the driving shaft, a bevel wheel upon the second shaft, a bevel wheel engaged thereby upon the shaft operating the driving wheels, spade shafts connected to the cranks of the crank shaft, guide bars-mounted upon said spade shafts, slippers upon said guide bars, rods pivotally connected at one end to the crank shaft and at the other to the slippers,

bosses slidable on the guide bars, plates pivotally mounted upon the upper ends of the blades, springs operating to move the plates in one direction, rods connecting the plates with the bosses whereby when the slippers contact with the bosses the plates are operated against the action of the springs, links controlling the radial movement of the spades and means for propelling the machine and operating the spades.

In testimony whereof I affix my signature in the presence of two witnesses,

M. LESLIE MILLER.

Witnesses B. U. POWELL, D. Lnsmn MILLER.

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