US1430542A

US1430542A - Swinging-scoop excavator

Info

Publication number: US1430542A
Application number: US213868A
Authority: US
Inventors: James C French
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-01-26
Filing date: 1918-01-26
Publication date: 1922-10-03
Anticipated expiration: 1939-10-03

Description

J. C. FRENGH.

SWINGING SCOOP EXCAVATOR.

, APPLICATION FILED JAN. 26. 1918. d gg gq g Pawn'lbefl; Oct 3, W22

3 SHEETSSHEET I.

Jaw/ZZZ J. C. FRENCH.

SWINGING SCOOP EXCAVATOR. APPLICMIONV FILED JAN, 26, 1918'.-

LggQ g g Patenteti m. 3, 1922,,

3 SHEETS-SHEET 2.

Patented @ct 3 1922.,

3 SHEETSSHEET 3 Patented @et. 3, l2.

JAMES C. FRENCH, OF CHICAGO, ILLINOIS, ASSIG-NQR T0 FER ICK C. AUSTIN, OF CHICAGO, ILLINQIS.

SWINGING-SCOOP EXGAVATOR.

T 0 all whom it may concern:

Be it known that 1, JAMES C. FRENCH, a citizen of the United States of'America, and resident of Chicago, county of Cook, and State of Illinois, have invented a certain new and useful Improvement in Swinging-Scoop Excavators, of which the following is a specification.

This invention relates to swinging scoop excavators of that general class inwhich a scoop is mounted on the lower end of a beam which is pivoted on the outer end of a swinging boom and in which means are pro vided for operating said beam and boom, to fill the scoop and to then raise the boom into position for the load, and for controlling the scoop to discharge the contents thereof when the desired dumping position is reached.

Generally. stated, the object of the invention is to provide a novel and improved swinging scoop excavator of the foregoing general character.

A special object is to provide an improved construction and arrangement whereby the scoop is caused to fill or take up a load by movement thereof toward the body of the excavator, and whereby the boom and the beam upon which the scoop is mounted can then be raised to carry the load upward to the desired dumping position.

It is also an object toprovide certain details and features of construction and combinations tending to increase the general efficiency and desirability of an excavator of this particular character. A

To the foregoing and other useful ends the invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings Figure 1 is a side elevation of the body portion of an excavator embodying the principles of the invention, showing one end thereof, and also the swinging boom, broken away and omitted for convenience of illus tration.

Figure 2 is a side elevation of the boom and its pivoted beam and scoop. a

Fi ure 3 is a view similar to Figure 2, but showing the full length of the, boom, and illustrating the beam and scoop in dumping position. I

Figure A is a plan of the scoop, on a larger scale,,and of a portion of the boom, being a horizontal section on line M in Figure 2.

Figure 5 is a front elevation of said scoop, showing the lower portion of the tilting beam.

Figure 6 is an enlarged detail sectional view of one of the lockinodevices for the scoop.

As thus illustrated, the invention comprises a body or main frame 1 mounted on a suitable turn-table 2, which latter is supported by a truck comprising caterpillars 3,

one at each side of the machine, of any suit-' able length, so that the excavator is self-propelled by means of a truck upon which the body frame is supported through the me dium of a turn-table, whereby said body can be turned or rotated about a vertical axis. It will be understood that the other end portion of the body frame 1, which is shown broken away, may be equipped with an engine or motor for operating the caterpillars or other traction devices, and for operating the winding-drum-mechanism 4: by which the various lines or cables are operated or controlled to in turn operate or control the excavating apparatus. Said apparatus comprises a boom 5 pivoted on the body frame at .of the boom. At its lower end said beam 7 is provided at its inner side with a transverse head 9 to one end of which the scoop 10 is pivoted at 11-, said scoop facing the body frame of the excavator, whereby the scoop must be filled by forward movement thereof toward the body of the excavator. To hold the scoop in operative position on the head 9, locking devices are provided, each comprising a locking bolt 12 in a barrel 13, which latter contains a spring 14- to keep the locking bolt yieldingly extended. The mouth of the scoop is provided with a pair of catches 15 to engage the outer ends of said lockin bolts, and the relative formation of said catches and locking bolts (see Figure 6) is such that when the scoop swings upward about its lpivot 11 these catches 15 will engage the b0 ts l2 and force the latter inward or backward against the yielding pressure of the spring 14:, before the bolts shoot into the openings 16 of said catches, which latter will lock the scoop in operative shaft 17 is mounted transversely on the head power, or,

9 and provided with arms 18 which are suitably connected with rods 19 connected with the locking bolts, whereby rocking motion of this shaft will withdraw the bolts 12 from engagement with said catches. This is preferably accomplished through the medium of a crank-arm 20 on the rock-shaft 17, and by means of a tripping cable or line 21 secured to this arm and extending upward and over the sheave 22 on the outer end of the boom, and then back to the winding-drum mechanism 4, if it be desired to operate it by if desired, simply to a position where it can be operated by hand to control the locking mechanism of the scoop when it is desired to release ordump the load. The head 9, it will be seen, is held practically at right angles to the beam 7 by means of a brace 23 connected to the outer end of said head. Another line 24 is connected to the mouth of the scoop at 25, and extends upward and over a sheave 26 on the head 9, then over the sheave 27 on the outer end of the boom 5, then back to the winding-drum mechanism 4, whereby, after the load is dumped, a pull may be exerted on this line or cable 24 to restore the scoop to operative position on the head 9, the previously described locking mechanism serving automatically to lock the scoop in this raised or restored position. In addition, the forward end of the head 9 has a sheave 28 for engagin the operating cable or line 29, the latter being fastened at one end to the base of the boom at 30, and then, after passing around said sheave, passing under the sheave 31 29 serves like a drag line to operate the bucket. The upper end of the beam 7. is provided with a pivoted link 32, which is adjustably connected therewith, and which is in turn connected with a shorter link 33 pivoted on the boom, the joint between these two links being provided with asheave' 34 for the line or cable 35 by which the boom is raised and lowered. This line or cable 35 may be arranged in any suitable or desired manner, and may, for example, have one end thereof secured to the main body frame at 36, and can then pass around the sheave 34 and back to the sheave 37 on the upper portion of the main body frame, and then downward to the winding-drum mechanism 4, so that thelatter may be operated to raise and lower the boom. It will be seen that, with this arrangement, a pull exerted by the winding-drum mechanism 4 on the cable or line 35 will exert a pull. on the link '32, and will thus produce, or tend to produce, a tilt-- ing motion of the beam 7, so that the latter will be tilted outward into the position shown in dotted lines in Figure '3, whereby the scoop is then in position to be lowered into the ground, or into a loose mass of materials, to thereafter be pulled forward to take up a load. This operation of the scoo is produced, as previously described, by t e operating line or cable 29, and when the beam 7 reaches the tilted position shown in full lines in Figure 3, or substantially so, the scoop is then in position to safely carry the load upward and around into the dumping position.

Obviously, there are various ways of using an excavating machine, or a machine for handling materials, of the foregoing construction, and the invention is not limited to any particular use or method of use. For example, the boom 5 can be lowered to bring the scoop into position for operation,'on the ground, or in a mass of loose materials, such as coal, crushed rock, sand or gravel, and the cable or line 29 can then be operated to pull the scoop forward, thus causing it to receive a load. Then, while maintaining a suflicient pull on the line or cable 29, to keep the scoop in carrying position, the cable or line 35 can be operated to swing the boom 5 upward, and thereafter, if necessary, the turntable mechanism 2 may be operated, by any suitable power-transmitting connection with the engine or motor on the body of the machine, to swing the boom 5 laterally to the extent necessary to carry the scoop around to the desired dump-in" position. Then the tripin rope or cab e 21 will be operated, either y and or by power, thus unlocking the scoop, and allowing it to tilt into the position shown in full lines in Figure 3, thereby discharging the load. For this dumping operation it will be necessary, of course, to ensure a slack condition of the restoring rope or cable 24, so that the downward tilting motion of the scoop into dumping position will not be retarded. As soon, however, as the load is discharged this line or cable 24 can then be operated by. the winding-drummechamsm, to restore the scoop to operative position on the head 9,, as previously. explained, thereby to automatically lock the scoo in ralsed or operated position, so that it Wlll then be ready for another operation after being lowered to the ground. Of course, if the scoop is not exactly in position to take up the load, the caterpillars or other 7 Laeoeaa will take up a load." With this construction, therefore, the scoop may be moved or operated in a direction to take up a load by the cable or line 29, while the entire weight of the scoop and the boom and the beam is exerted downward, and without. any tendency to lift the scoop. There is no lifting action whatever until the line or cable 29 is operated.

With the construction shown and described, it will be seen that the bucket is positively tilted up and down about its pivot 11 on the beam 7, so that it is released or tripped to dump the load, and is then positively raised into latched position on the beam, so that it is ready for operation whenlowered to the ground.

With the construction shown and described, it will be seen that the drag-line 29 is connected through the locking device or latch 12 and 15 to the scoop, so that the pull on the drag-line is exerted through'said locking device to the scoop to pull the latter along the ground, when the scoop is loaded. In this way, means are provided for, in effect, connecting the drag-line to and disconnecting it from the scoop.

What is claimed as my invention is:

1. In a traveling excavator, a boom, a beam pivoted on the outer end of said boom, a scoop pivoted on the lower end of said beam, means to raise and lower said boom, instrumentalities including means for controlling the scoop to cause the up and down tilting thereof on said beam and other means for operating said scoop to take up a load and discharge the same therefrom, including a drag line leading directly to a point at the mouth of the bucket, and means to hold the scoop rigid with the beam at all times except when tilted to dump the load.

2. In a swinging scoop excavator, a boom, a beam pivoted on the outer end of said boom, a transversely disposed head on the lower end of said beam, a scoop pivoted on one end of said head, a latch to lock the mouth of the scoop to the other end of the head, means to raise and lower said beam, instrumentalities for controlling and operating said scoop to take up a load and discharge the same therefrom, and a body frame to support said boom, said scoop being disposed in position for movement toward said body frame to take up a load, and said inst-rumentalities including one line for pulling the scoop forward. a second line to trip-the latch and release the load, a third line to restore the scoop to operative position at the lower end of said beam, means on the lower end of said beam to support the one line, and means on the boom to support the second and third lines.

3. A structure as specified in claim 1, said beam having a link mechanism pivotally connected to the upper end thereof, and said lifting means being connected to said link mechanism, whereby operation of said means to lift the 'boomserves also. after the drag line is released to tilt the beam on its pivot to carry the scoop backward and outward into'position to again be pulled along the ground by the drag-line when the boom is lowered; v

4. At structure'as specified in claim 2, said beam having a parallel motion link mechanism pivotally connected to the upper end thereof, the second and third lines extending around the pivot of said beam and under said mechanismfand said lifting means being connected to a joint of said link mechanism, whereby operation of said means to lift the boom serves also to tilt the beam on its pivot.

5. In a swinging scoop machine, the combination of a boom pivotally mounted at one end to swing up and down. means whereby the boom may also swing sidewise. a vertically disposed beam pivoted on the outer end of said boom, a pivot on the lower end of said beam, a transversely arranged head having one end mounted on said pivot, a brace connecting the other end of said head with said beam, so that said head is rigid with the beam and extends toward the pivoted end of the boom, a scoop having its rear end mounted on said pivot and its mouth or front end disposed toward the pivoted end of said boom, means for locking the scoop against the under side of said head, a releasing line for controlling said locking means, means carried by said boom to support said line, a restoring line for pulling the scoop upward into locked relation .to said head, means carried by said boom to support said second line, means connected to theend of said head and operating like a dragline to pull the scoop 'forward along the ground and toward the pivoted end of the boom for causing the scoop to take up a load, and devices for raising and lowering the boom and tilting said beam thereon.

6. A structure as specified in claim 5, said devices comprising a short link pivoted on the boom, a long link adjustably pivoted on theupper end of said beam, with a pivotal connection between the two links, and a raising and lowering line connected to said links, said releasing and restoring lines extending around thepivot of said boom and under said long link.

7. In an excavator, the combination of a boom, a vertically disposed beam pivoted on the end of said boom, means for tilting the beam about its pivot, a scoop pivoted on the lower end of said beam, with the mouth of the scoop facing toward the excavator, means for tilting the scoop about its pivot, a drag'line extending directly to a point at the m uth of said scoop, means for raising and lowering said boom, and means for releasably locking the scoop against movement relatively to said beam. said docking device being interposed between the scoop and said drag-line, so that the dragline is connected through the lock to the scoop.

8. In an excavator, the combination of a support, a scoop disposed on the'bottom of said support, a pivot for the rear end of the scoop at the rear end of the support, a catch on the front end of said support. means on the front end of said scoop to engage said catch, a swinging beam to the lower end of which the support is rigidly fixed, means to operate said beam, and means to release said catch to dump the load.

9. In an excavator, the combination of a scoop. a drag-line for pulling the scoop forward along the ground, a support on which the scoop ispivoted. and means including a locking device through which the drag-line is connected to the scoop, and by which the scoop is locked against movement relatively to said support.

10. A structure as specified in claim 10, in combination with means to control said locking device, and means to tilt the bucket about its pivot on said support.

11. A structure as specified in claim 10,

in combination with means for pivoting said support to swing about a horizontal axis, and means for controlling said support.

12. The combination of a scoop, a dragline for operating the scoop along the. ground, and means for, in effect, connecting the drag-line to the scoop and for disconnecting it therefrom.

13. A structure as specified in claim 13, said means comprising a locking device, in combination with a line to control said locking device, and another line to control the scoop.

Signed by me at Chicago, Cook County. Illinois, this 18th day of January, 1918.

JAMES C. FRENCH.