US2000195A

US2000195A - Auger bucket for machines for digging caissons and the like

Info

Publication number: US2000195A
Application number: US631850A
Authority: US
Inventors: Emeline R Siebel
Original assignee: Spencer White and Prentis Inc
Current assignee: Spencer White and Prentis Inc
Priority date: 1932-09-06
Filing date: 1932-09-06
Publication date: 1935-05-07
Anticipated expiration: 1952-05-07

Description

- May 7, 1935. E. H. SIEBEL 2,000,195

AUGER BUCKET FOR MACHINES FOR DIGGING CAI SSONS AND THE LIKE Filed Sept. 6, 1952 3 Sheets-Sheet l y 1935- E.IH. SIEBEL 2,000,195

AUGER BUCKET FOR MACHINES FOR DIGGING CAI'SSONS AND THE LIKE Filed Sept. 6, 1932 3 Sheets-Sheet 2 E, H. SIEBEL 2,000,195

AUGER BUCKET FOR MACHINES FOR DIGGING CAISSONS AND THE LIKE May 7, 1935.

Filed Sept. 6, 1952 5 Sheets-Sheet 3 Patented May 7, 1935 UNITED STATES W PATENT OFFICE:

AUGER BUCKET FOR MACHINES FOR DIG- GING CAISSONS AND THE LIKE Application Septemberfi, 1932, Serial No. 631,850 12 Claims. (Cl. 2255-19) This invention relates to apparatus for digging deep holes of large diameter such as caisson holes and the like. It has more particular reference to improvement in the earth conveying digging augers provided for use in such apparatus. 1

A principal object of the present invention is the provision of an improved earth conveying and digging auger for use in the apparatus of the character of that shown in the application of Hilmar Emil Satre, Serial Number 517,845, filed February 24, 1931 for improvements in Caisson boring machines, which application has matured into Patent No. 1,998,591, issued April 23, 1935- and been assigned to Spencer, White and Prentis, Incorporated, New York, N. Y., a corporation of Connecticut.

An important object of the invention is the provision of an excavating and conveying auger bucket for use in the machine of said application and other machines which will be self discharging when the bucket has been lifted out of the hole for emptying and through the actionof devices wholly or substantially wholly automatic in their action. V

The invention contemplates in this regard the performance of the digging operation by arranging the bucket in contact with the floor of the hole and its rotation to cause cutting elements on the bottom of the bucket to dig the earth and deliver it through slots in the bucket bottom, un-

til the bucket has received a full charge of excavated earth, The bucket is then raised to above the ground and to a discharge station, whereupon rotation is accomplished in the opposite direction to quickly discharge the excavated earth back out through the slots, preferably through the influence of devices which press the earth down into the bucket as it is emptied and which produce a relative rotation between the slotted bucket bottom and the contained charge of earth, so that the charge is sliced back through the slots at relatively high speed. Additionally the invention contemplates the automatic timing of the operation of the last mentioned devices to start them into operative action immediately after the arrival of the bucket in upper or'discharge position, to render them ineffective at completion of the discharge operation, and to return them to initial position as an incident to the start of downward movement of the bucket for the next succeeding excavating step.

Another important object of the invention is improvement in side cutter construction for auger buckets of the character described, and more particularly to provide a side cutter construction adapted to cooperate with the discharge mechanism earlier mentioned.

. An important object of the invention is the provision of a side cutter for a rotating digging and conveying auger adapted for the forming of caisson holes and the like, which shall be of sturdy construction and which may be moved into and out of digging positions by the rotative movements of the auger itself and without the necessity of providing special control mechanisms.

The invention contemplates the attainment of the several foregoing objects and purposes in apparatus sufficiently sturdy in construction and efficient in operation to permit of the digging of deep holes for caisson construction and other purposes, of large diameter as for example, four, six, and eight feet and more.

Numerous other objects and advantages of the invention will be apparent from the following description which taken in connection with the accompanying drawings discloses a preferred embodiment thereof. 1

Referring to the drawings, I

Figure 1 is a side elevation of a combined digsing and conveying auger bucket embody n the instant invention, parts of the excavating apparatus being disclosed;

Figure 2 is a vertical section through the struc ture of Figure 1, taken substantially on the line 22;

Figure 3 is a top plan view taken substantially on the line 3-3 of Figure 2; V

Figure 4 is a bottomplan view of'the auger bucket shown in Figure 1; v

Figure 5 is a detail section taken substantially on the line 5-5 of Figure 1. v

The caisson apparatus of the co-pending Satre application above mentioned employs a main digging shaft which extends down through the hole with its axis in registration with the axis of the hole, and a combined digging and conveying bucket is mounted on this shaft andslides-from digging to discharge positions. The bucket is keyed to the shaft against independent rotation so that rotation of the shaft imparts digging rotation to the bucket. So much of this apparatus as is thought necessary to an understanding'of the instant invention is shown on the drawings.

. Reference character ll indicates a front I- beam member of the main frame of the machine,

' and reference characters l2 front to back strucment with the bottom edge of the cylindrical part.

l5 throughout substantially degrees as indicated at l1. The bottom edge of the part 15 is cut back from the opposite ends of a diameter indicated at a-a in Figure 2 in the form of a helix throughout degrees and each bottom member I6 is extended beyond its connection H with the cylindrical body |5 to provide a slot l8 between its edge i9 and the adjacent (but lower) edge 2| of the adjacent or other member I6.

A digging element 23 is secured by bolts 24 or the like to extend forwardly across the slot I8 from the forward edge of each bottom member l6, and each of these digging elements is or may be provided with serrations or teeth 25. Digging elements 26 are also provided for attachment to the body |5 at 21 and extend forwardly as indicated at 28 to provide lower side and reaming cutters arranged at the floor of the hole.

The auger bucket thus constructed is mounted upon a sleeve 3| embracing the shaft l3 and having keyways 32 matching the keys M of the shaft. Plates 33 are provided at the bottom to connect the inner edges of the bottom members |6with the sleeve 3|.

Openings indicated at 36 are arranged through opposite sides of the body |5 to receive earth excavated by reamers, the construction and mounting of which will now be described. Reamer blades 31 are mounted upon the free edges of doors 38 pivoted on inclined pivots 39 for movement from a position closing the openings 36 outwardly into digging positions where the digging or reaming elements 31 cut away the side wall.

of the hole and the doors 38 sweep the earth into the interior of the bucket. The doors 38 are so mounted that when the bucket rotates in its cutting action, the reamers or digging elements 31 are swung outwardly into engagement with the sides or wall of the hole. presented surface causes thereamers or. digging elements 31 to cut into the earth until stopped by limiting chains 4| secured to the doors at. 42 and to the body |5 at 43. Continued rotation of the bucket causes reaming of the hole and delivery of the excavated earth through the openings 36.

The diameter of cut may be varied by increasing or decreasing the chain lengths 4|. When, however, the bucket is given suflicient rotation in the reverse direction, the center of gravity of the doors 38 having been lifted in the opening movement of the doors, the doors automatically close by gravity as soon as the reaming or excavating elements 31 are freed of their engagement withthe wall of the hole.

As has been earlier explained, means are provided for automatically accomplishing discharge of each charge of earth received into the bucket as soon as the bucket is lifted to a discharge position above the surface. The bucket is lifted from the hole, sliding upwardly on the shaft l3 bymeans of two cables 44 secured at their lower ends at 45 in a cross-yoke 46 rotatably connectentangling or twisting of the cables 44.- The yoke Engagement with the 46 is or may be pivotally mounted at 50 to provide for uneven lengths of the cables 44.

An inner sleeve or shell 5| of unitary rigid structure is mounted within the body l5 and extends substantially throughout its height. Its bottom edge 52 is arranged within slots'53 provided between the higher portions of the bottom .members l6 and the side of the body |5 of the bucket. A spider 54 connected at its ends at 55, is arranged within the top of the sleeve 5| to loosely embrace the sleeve 3| and is supported.

by a ball bearing. 56 from the sleeve 3|. The shell 5| is normally locked to the body l5 by two locking dogs 51 pivoted at 58 in oppositely extending arms of the spider 54, the outer ends of these dogs being arranged in registering slots 59 and 6| of the sleeves l5 forming the cylindrical part of the bucket body and 5| arranged within the bucket. -The sleeve 5| is provided with openings 6|! which register with openings 36 in the bucket body.

Two downwardly extending posts 62 are secured to brackets 63 carried by the frame members l2. The'lower ends of these posts are arranged in vertical registration with tails 64 of the dogs 51. Figure 3 shows the position of the bucket and its several parts as the bucket approaches the upper end of its travel. Further upward movement of the bucket from the position shown causes the posts 62 to engage the dogs and swing them' from the horizontal position'shown up out of the slots 59 and. 6| and into rigid clips 65 where they are engaged to prevent rotation of the shell 5| while the bucket is in its uppermost or discharging position. v Thus arranged the bucket may be rotated by rotation of the shaft l3 in direction opposite to that given the bucket in digging to cause the upper edges IQ of the bottom member M5 to cut away the charge of earth to deliver it out through the slot to empty the bucket.

Means are or may be provided to continually press down the charge as the shell is emptied. A'

plunger 1| is arranged within the shell 5| upon a bushing 12 embracing thesleeve 3|. A threaded engagement is provided between the sleeve 3| and the bushing 12, this threaded engagement consisting in the present instance of a thread 13 on the sleeve 3| and a spiral recess 14 in the bushing. Two keys or ribs 15 are arranged upon the inner surface of the sleeve 5| in position for engagement with slots'16 in the plunger. These keys extend from adjacent the bottom to adjacent but below the upper position of the plunger.

the keys 15 under the influence of the thread 13 to press the charge out of the slots at the bottom of the bucket. When the plunger reaches the bottom it is disposed beneath the lower ends of the keys 15 and may rotate idly with the shaft.-

SA dog 11 is pivoted-at 18 at the lower end of each key which may be swung up out of the way as the plunger starts this idle rotation and which operates as a latch to reengage a slot 16 when the sleeve 5| is rotated in the opposite direction. The dogs '11 then form continuations of the keys earth to facilitate the discharge through the slots.

andcause thethread to lift the plunger back to its upper normal position.

As the bucket is lowered after discharge, the

dogs 51 reengage in the slots 59 and BI to accomplish conjoint rotation of the sleeve 5! and bucket I5 during the digging.

To facilitate rotation between the body l5 of the bucket about the sleeve 5! while the discharge is being accomplished rollers 18 arranged in carriers 8| secured in the body It: may be providedto engage the opposed outer surface of the sleeve 5|. I V It is thought that the invention and many of its attendant advantages will be understood from the foregoing without further description, and it will be apparent that various changes may be made in the construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing many of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim: r

1. An auger for digging caisson holes and the like, comprising a cylindrical bucket-having radial earth receiving slots in its bottom and provided with digging elements for digging onthe floor of the hole and delivering the excavated earth through said slots into-said bucket, and means within the bucket for discharging the excavated earth received through said slots out through the slots in a tangential direction after the bucket has been removed from the hole for discharge.

2. An auger for digging caisson holes and the like, comprising a cylindrical bucket having earth receiving slots in its bottom and provided with digging elements for digging on the floor of the hole and delivering the excavated earth through said slots into said bucket, and means within the bucket for rotating the charge of excavated earth carried by the bucket to accomplish discharge of said earth through said slots.

3. An auger for digging caisson holes and the like,comprising a cylindrical bucket having radial earth receiving slots in its bottom and provided ith digging elements for digging on the floor of the hole and delivering the excavated earth through said slots into said bucket, and means within the bucket when at a discharge position for comminuting and moving the earth contained in the bucket out through said slots to empty the bucket.

4. An auger for digging caisson holes and the like, comprising a cylindrical bucket having earth receiving slots in its bottom and provided with digging elements for digging on the floor of the hole and delivering the excavated earth through said slots into said bucket, and means within the bucket when at a discharge position for removing the earth contained in the bucket out through said slots to empty the bucket, said means including a device for rotating the charge of earth rela-.

tively to the slots in the bottom of the bucket.

5. An auger for digging caisson holes and the like, comprising a cylindrical bucket having earth receiving slots in its bottom and provided with digging elements for digging on the floor of the hole and delivering the excavated earth through said slots into said bucket, and means within the bucket when at a discharge position for moving the earth contained in the bucket out through said slots to empty the bucket, said means including a device pressing upon the contained earth for forcing it out through the slots as the bucket is emptied, and a device for comminuting the 6. An auger for digging caisson holes and the like, comprising a cylindrical bucket having earth receiving slots in its'bottom and provided with digging elements for digging on the floor of the hole and delivering the excavated earth through said slots into said bucket, and means within the bucket when at a discharge position for moving the earth contained in the bucket out through said slots to empty the bucket, said means including devices conjointly operable, one, for producing relative rotation between the charge of earth'in the bucket and, two, forpressing downwardly ion the material as the bucket is emptied.

7. An auger fordigging caisson holes and the like, comprising a cylindrical bucket-having digging elements on its bottom and discharging devices in its interior, said digging devices .being operable to dig and fill the bucket upon rotation of the'bucket in one direction, and said discharging devices being operable by relative rotation in the opposite direction. i 1

8. An auger for digging caisson holes and the like; comprising a cylindrical bucket having earth receiving slots in its bottom, and provided with digging elements for digging on the floor of thehole and discharging the excavated earth through saidslots into said bucket, said'bucket having also an earth receiving opening in its side, and a-door for said opening provided at its free edge with a reaming element for enlarging the diameter of the hole, said door being pivoted to swing from an opening closing position to a digging position by rotation of the bucket in its digging operation, in combination with an inner cylindrical earth receiving shell rotatable relative to the auger bucket, and means associated therewith to forcibly expel the charge of earth.

9. In an excavating apparatus, a cylindrical auger having on its lower face earth receiving slots and provided with digging devices adjacent the slots discharging thereinto, means to rotate devices to feed the earth through the slots to the interior and in the opposite direction to discharge the earth outwardly through said slots, a cylindrical earth retaining shell concentrically disposed within the auger and having openings registering with the auger slots, means to lock the shell and auger together for common rotation in a digging direction, means to release the connection between the shell and auger prior to rotation of the auger in a discharging direction, and means associated with the inner shell for release to expel the earth from the inner shell and to hold the shell against rotation with the auger in a discharging direction, the expelling means comprising a follower resting upon the. earth in the shell and means to feed the follower downwardly upon reverse rotation of the auger.

10. In an excavating apparatus, a cylindrical auger having on its lower face earth receiving slots and provided with digging devices adjacent rotation in'a digging direction, means to release lease to expel the earth from the inner shell and. to hold the shell against rotation with the auger in a discharging direction, the expelling meanscomprising a follower resting upon the earth in the shell and means to feed the follower downwardly upon reverse rotation of the auger.

11. In an excavating apparatus, a cylindrical auger having on its lower and side faces earth receiving slots and provided with lower and side digging devices adjacent the slots discharging thereinto, means to rotate the auger in one direction to cause the digging devices to feed the earth through the slots to the interior and in the opposite direction to discharge the earth outwardly through said slots, said means comprisinga rotatable guide shaft disposed axially of the auger and having a splined engagement therewith, a

cylindrical earth retaining shell, concentrically disposed within the auger and having openings registering with the auger slots, means to lock the shell and anger together for common rotation in a, digging direction, means to release the connection between the shell and auger prior to rotation of the auger in a discharging direction, and means associated with the inner shell for release to expel the earth from the inner shell and-to hold the shell against rotation with the auger in a discharging direction, the expelling means comprising a follower resting upon the earth in the shell and means to feed the follower downwardly upon reverse rotation of the auger. 12. In an excavating apparatus, a cylindrical auger having on its lower face earth receiving slots and provided with digging devices adjacent the slots discharging thereinto, means to rotate the auger in one direction to cause the digging devices'to feed the earth through the slots to the interior and in the opposite direction, to discharge the earth outwardly through said slots, at cylindrical earth retaining shell concentrically disposed within the auger and having openings registering with the auger slots, means to lock the shell and auger together for common rotation in a digging direction, means to release the connection between the shell and auger prior to rotation of the auger in a discharging direction, and means associated with the inner shell for release to expel the earth from the inner shell and to hold the shell against rotation with the auger in a discharging direction, the expelling means comprising a follower resting upon the earth in the shell and means to feed the follower downwardly upon reverse rotation of theauger, said means comprising a helix rotatable with the auger and having a threaded connection with the follower.

EWALD H. SIEBEL.