US1308843A - Charles e - Google Patents

Description

c. E. DAVIS DRIVING CHAIN FOR MINING MACHINES.

APPLICATION FILED MAY 10. I915- 1,808,843; Patented July 8, 1919.

" UNITED STATES PATENT OFFICE.

CHARLES E. DAVIS, OF CHICAGO, ILLINOIS, ASSIGNOR IO GOODMAN MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

DRIVING-CHAIN FOR MINING-MACHINES.

e1,3os,s43.

Patented July 8, 1919.

' Application filed May 10, 1915. Serial No. 26.991.

To all whom it may concern? Be it known that I, CHARLES E. DAVIS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinols, have invented a certain new and useful Improvement in Driving-Chains for Mining-Machines, of which the following is a specification.

My invention relates to improvements in cutter chains for mlning machines, and has for its obj ect to provide a new and improved chain of this description.

The invention is illustrated in the accompanying drawings,'wherein Figure 1 is a plan view; 1

Fig. 2 is a longitudinal sectional view through one of the blocks,

Fig. 3 is a cross sectional view through one of the joints where the knife carrying blocks of the chain are connected together and showing the chain in the guide;

Fig. 4 is an enlarged view of the eccentric pins used in connecting the blocks together;

I or lining for a mining machine chain made up of a series of blocks 1, which carry knives oreutters 2, the blocks being directly connected together without intervening links. Each block is bifurcated at one end, having two separated branches 3. At the other end of each block is a single piece 4, which is received be tween the branches 3 of the adjacent block.

Part 4 is provided with an opening lnto which is received a removable bushing 57 made of hardened steel, some means being provided for preventin the bushing from turning in the block. preferably made of flat pieces of steel which are formed into proper shape and the two 'meeting ends 6 are bent so as to project laterally,

said meeting ends fitting into a groove 7 in' the block and preventing the bushing from turning in the block. When hese bushings areconstructed in this manner, the bushings are spring bushings and when placed in positron spring outwardly so as to enga e the inner face of the opening in the bloc the bushings being thus held in place without the aid of any holding device, before the blocks are assembled. The branches 3 are provided with holes which are in alinement with thehole in the part 4 of the adjacent part so that. when the part 4 is inserted be- .tween the branches 3 the connecting pin 8 of hardened steel may be inserted so as to hold the'blocks together. These pins pass through the hardened steel bushings 5 and rotate therein. Some means is provided for preventing them from rotating in'the openings in the branches 3 so as to confine the wear of the chain to the hardened steel bushings 5 and the hardened steel pins 8. As herein shown, this is accomplished by providing the pins 8 with enlarged eccentric heads 9 .which fit into eccentric holes or.

countersunk openings 10 in one of the branches 3. Some suitable means is provided for holding these pins in place. In

view of the fact that the pins are of hardened steel they c'annotbe riveted, and hence I have shown said pins as being provided with a removable eccentric head 11, which fits into an eccentric opening 12 in one of the branches 3 of the block. The pin and removable head have openings passing thencthrough for a pin or rivet 13 of softer metal, which can have its ends riveted as illustrated in Fig. 3 to hold them together and thus keep the wearing pin in position. It will therefore be seen that by means of this construction'the blocks containing the knives or cutters are directly connected together; and it will further be seen that the wear on these blocks comes not upon the material of the blocks themselves but upon the hardened removable bushings and pins which are able to stand the wear and which, if worn, can be easily, quickly and cheaply replaced, thereby preservmg the expensive knife holding blocks and insuring the long life of the chain. By doing away with the links connecting the blocks, the number of knives for a chain of any given length is greatly increased, and this greatly, reduces the wear' on the chain and increases its life, and the wear on the knives is also reduced.

The chain made up of these blocks and knives passes around the usual cutter arm 14: (see Fig. 3). In Fig. 3 T have also shown the blocks as provided at the top and bottom with the projecting lips 15 at the shank of the knife'which should be of the.

proper size and shape. It has been found that the sand forming the core burns away and the hole is too small and the metal has to be cut out. This is expensive and makes it difiicult to get a correct fit of the shank in the opening. If they hole is too small the shank cannot be placed in it, and if too large it works loose and comes out. In the present construction this; difficulty is obviated by providing a casing 19, of metal, such as sheet steel, the opening of which is just the size of the shank of the knife. This rectangular casing is placed around the core of the mold in which the'block 'is molded,

- and when the hot metal is poured into the mold it comes into contact with this metal casing and melts it sufficiently to adhere to it. Then when the core of sand is removed from the casing this casing forms the-inner lining for the opening for the shank.- This gives a smooth inner surface to this opening and provides an opening of exactly the right size at alltimes, and does away with the necessityof doing any machine work on it. Thecasing is shown separate from the block in Fig. 7 and is shown in the block in Figs. 1 and 2..

construction embodying the invention, but

I it is of course-evident that the parts may be varied in many particulars without departing from the spirit of my invention, and I therefore do not limit myself to the par- "ticular construction'shown.

As shown-in Figs. 1 and 2,'the. space between'the branches3 of the bifurcated end of the block 1 is. greaterthan is necessary for the pro ecting end of theadjacent block, thereby leavin an openin 20 which extends entirely t rough the b ock, The teeth 21 of the sprocket, wheel 22, at the point where the chain changes direction (see Fig.

1) project into these openings 20, and it will be noted that since the openings pass entirely through the chain when it 11S assembled, there is no chance for these open-v ings to become filled with foreign matter so as to interfere with the proper operation of as the teeth of the nsoaece sprocket wheel will push any such foreign matter out through the end of the opening opposite them, into which the tooth enters. The sprocket wheel drives the chain when the machine is-in operation, and when driv-' ing it in one direction the teeth of the sprocket wheel engage the ends 23 of the blocks which project between the members 3. When the sprocket wheel moves the l 19 is also provided with. a shoulder 26 which fits the shoulder 25." 1

I claim:

1. i A chain for mining machines formed of links perforated near their opposite ends, pins for uniting the links, and bushings with which the said pins engage seated in the perforations in one of the end'portions of the piece of metal bent into cylindrical shape,

links, the bushings being each formed of a the ends of the metal of the bushing. being bent outwardly and brought close together and substantially parallel, the said ends being fitted into a groove formed in the link and communicating with the perforation in which the bushing is seated. i

2. A block forcutter chains for mining machines, comprising, a body portion having openings therethrough at opposite ends thereof, a removable'bushing in the opening p I I at one end of the body portion and provided I have described in detail a particular with a projectin part which fits into a groove'in the b0 y portion, a pin passing through. the opening at the other end of said body portion, said pin provided withan e0 centric head theopening at the said other end being en larged to receive said eccentric head, and means for fastening said pin in position.

3. A block for cutter chains for miningmachines, comprising a body portion having openings therethrough at opposite ends thereof, a removable bushing in the openingat one end of the body portion, means for preventing said bushing from rotating with relation to said body orti'on, a. member provided with an eccentric head, and with a projecting part which projects into the opening at the other end of said block, said opening bein enlarged to receive said eccentric head, and position. I

4. A block constituting one of the elemeans for holding said member in ments of a chain for mining machines having one of its ends formed into separated branches and its opposite end shaped to fit between the branches of a similar block, the block being perforated near its opposite ends to receive the connecting parts that unite it with similar blocks, and one of the branches having formed in its outer face an eccentric recess, in combination with a pin adapted to pass through 7 registering perforations of blocks that are to be united, the pin having at one of its ends anveccentric head adapted to fit said recess .in the block and hold the pin against relative rotation, a separate head for the opposite end of the pin, and means for uniting the separate. head .to the pin.

5. A blockconstituting one of the elements of a chain for mining machines having one of its ends formed into separated branches and its opposite end shaped to fit between the branches of a similar block, the block being perforated near its opposite ends to receive the connecting parts that unite it with similar blocks, and the branches having formed in their outer faces eccentric recesses, in combination with a pin of hardened metal serving as a pintle for connected blocks having an eccentric head adapted to fit into one of the said eccentric recesses, a

separable head for the pin adapted to fit into the other eccentric recess and a rivet of softer metal passing through the pin and uniting its separate headthereto and thus securing it in working position.

6. A block for cutter chains for mining machines, comprising a body portion having an opening therethrough at one end, a sleeve of hardened metal passing through said opening, means for preventing said sleeve from rotating with relation to said body portion, the other end of said body portion having two separated branches adapted to receive between them the adjacent part to which said block is connected, each of said branches having an opening, a in of hardened metal passing-throu h said openings, an enlarged eccentric hea connected with said pin, one end of the opening in the body portion being enlarged to receivesaid eccentric head, and means for fasteningsaid pin and head to said body portion. v

In testimony whereof I affix my signature, I

inthe presence of two witnesses,-this 22nd day of April, 1915.

CHARLES E. DAVIS.

Witnesses:

MINNIE M. LINDENAU, ELLA THIEME.

Images