US2332408A

US2332408A - Mine machine

Info

Publication number: US2332408A
Application number: US444849A
Authority: US
Inventors: Edwin P Stenger
Original assignee: Cincinnati Mine Machinery Co
Current assignee: Cincinnati Mine Machinery Co
Priority date: 1942-05-28
Filing date: 1942-05-28
Publication date: 1943-10-19
Anticipated expiration: 1960-10-19

Description

Oct. 19; 1943. P. s 2,332,408

MINE MACHINE Filed y 28. 1942 *1 INVENTOR, bowl/v Pans/v ATTO R N. EYS,

1 out.

Patented Oct. 19, 1943 p MINE MACHINE Edwin P. Stenger, OincinnatiQDhio, assignor to. The CincinnatiMine Machinery Company, Gin cinnati, Ohio, a corporation of Ohio! Application May'ZS, 1942, Serial No. 444,849-L 11 claims. (01. 74-454) My invention relates to cutter chains for mining machines and particularly to thepintle which joins the bitcarrying linkto the connecting'li'nks and means for fastening the same.

Inasmuch as cutter chains of the above type are subject to very heavy and rough wear, it has been found advisable to position the pintles in the side bars of the bit carrying link so that they will not revolve. It is also desirable to have these pintles so arranged as to be easily removable and insertable for repairs while job in a mine. 7

It is an object of my invention to provide'a pintle positioned in the side bars of the bit carrying link which is' not rotatable even under the heaviest kind of wear, and wherein the rotation of the pintle is prevented by shoulders similar to that shown in my Patent No. 2,280,502; issued April 21, 1942, and wherein I provide means which hold the pintle in place against longitudinal movement and which means permit the easy removal and insertion of the pintle under the most unfavorable conditions normally met in a coal mine.

'These other'ohjects of my invention which will be set forth hereinafter. or will be apparent to one skilled in the art after reading the specifications, I accomplish by that certain construction and arrangement of parts of which Iv shall now describe an exemplary embodiment, Reference is now made to. the drawing which forms a 1 part thereof and in which:

Figure l isa side elevation of a cutter chain including a bit carrying link and connecting links.

Figure 2 is a section on the section line 22 of Figure 1. v

Figure 3 is a perspective view of the pintle shown in Figures 1 and 2.

Figure 4 is a perspective view of one 'of the plugsused in connection with the pintle shown in Figure 3.

Figure 5 is a perspective view of a modifying pintle.

Figure 6 is a cross-section similar to that shown in Figure 2, but with one of the plugs knocked Briefly, in the practice of my invention; I pro- .vide a pintle having a cross-section defined by a portion of a circle and joined by a cord and similar to that shown in my Patent No. 2,280,502, issued April 21, 1942. Y The aligned apertures in the side bars for receiving the pintle'are similarly configured so that the pintle may not revolve. The pintle is so positioned that the circular portion of the surface is positioned against the the chain is on the v circularapertureor journal in the connecting link; so that all of the friction between the pintle surface and the bearing of the connectorlink'is carried bythe circular portion of the pintle.

In order to prevent my pintle from sliding longitudinally out of the aperturesof the side bars, I provide tapered hollow channels running longitudinally through the pintle and tapered plugs which are insertable in the channelends. The pintle is slit at both of its ends and when the pintle is in position, tapered plugs driven into the tapered channelexpand the ends of the pintle and thus frictionally lock'the ends in the side bars. One of the plugs has a longitudinal hole therein which permits the insertion of a rod for driving out the other plug when it is necessary to remove the pintle. After one of the plugs has been driven out, the rod is inserted in the space previously occupied by that-plug, and the first plug-may be driven out.

Referring to the drawing, I provide the usual bit-carrying link I having the side bars 2. Connecting the bit carrying links of the cutter chain is the usual connecting link 3, which has a circular hearing as is well known in the art. My -pintle 4 consists ofa circular rod with a flattened portion or chord 5. Tapered hollow channels it runlongitudinally through the pintle'withthe aligning.- When the pintle is in position, the. plugs l4 and Ma are driven into the channels l3 in the ends of the pintle which expand the ends due to the tapering of the channels I3 and the slits i5, and spread apart the ends and wedge them against the aperture in the sidebars 2. To remove the pintle from the side bar, a rod 29,

- of. lessdiameter than the aperture in the plug 14, is inserted through the aperturein the plug so as to contact the inner face of the second plug Ida and by driving the'rod; the plug 14a is driven out of the pintle, as is apparent in Figure 6. After the plug [4a is removed, the rod is then inserted in the aperture from which plug M was driven, I and the other plug 14 may be 'drivenirom the pintle. This permits the contracting ofthe ends of the pintle 4 and permits the easy longitudinal movement of the pintle for removing the same from the chain in either direction.

In the modification shown in Figure 5, the

pintle has a single longitudinal slot 2|. The slot H is cut through from the face 22 of the pintle its whole length and down to the tapered channels l3. This pintle is inserted in the same manner as heretofore described and the same plugs l4 and Ma are used to expand the pintle. In this case, it will be noted thatthe slot 2| is so positioned in reference to the position of the pintle in the cutter chain that no friction or wear is presented to the surface of the pintle which contains the slot.

From the above it is apparent that I have provided a pintle which may be readily removed and inserted in a cutter chain from either side of the chain and which is so configured as to parts, etc. that the positioning, insertion and removal of the same may be easily carried on in the dark and under the most unfavorable conditions existent in a coal mine, but which when once inserted and expanded will not slide nor revolve, and which will consequently promote long chain life and efllcient performance.

It is to be understood that modification may be made in my invention without departing from the spirit thereof and I do not intend to limit myself otherwise than as pointed out in the claims which follow:

Havingthus described my invention what I claim as new and desire to secure by Letters Patent, is:

1. In combination with a bit carrying link of a mining machine cutter chain, and a connecting link, one of said links having spaced side bars between which the connecting link is introduced,

said connecting link having a circular aperture,

and a pintle mounted in the side barsand passing through said circular aperture, said pintle having a flattened portion, and at least one of the side bars having an aperture for the pintle and which includes a shoulder to engage the flattened portion, thereby preventing the pintle from rotation, said pintle being longitudinally slidable through at least two of said apertures and means for ecuring the pintle against endwise movement comprising slits in the ends of the pintle, a hole through the pintle from end to end, and tapered plugs to enter the ends of the pintle to expand same, one of said plugs having a hole therein sufficient to receive a tool for driving out the other plug.

2. For use in combination with a mining machine cutter chain having links including, side bars and connecting links positioned within the side bars, a pintle having a constant. outside cross-section the outline of which is the same as the aligned apertures 01 the side bars, said pintle having a longitudinal hole therein from end to end, tapered plugs to enter the ends of said hole to expand the ends of the pintle and said pintle having at least one slot to permit the expansion of the same. I 1 H 3. For use in a mining machine chain, a pintle having a longitudinal; passage therein, said passage commencing at one end of said pintle and tapering inwardly, at least one slot in the end of said pintle and communicating with said passage, and-a tapered plug for insertion in said passage for expanding said pintle and to prevent longituchnal movement of the pintle.

4. For use in a mining machine chain, a pintle having a longitudinal circular passage therethrough from end to end, the ends of said passage being of a given cross-sectional area and tapering to a smaller cross-sectional area at the center, tapered plugs for insertion in the ends of said passage, said pintle having slit ends so as to permit expansion of the same upon insertion of said plugs.

5. For use in a mining machine chain, a pintle having a longitudinal circular passage therethrough from end to end, the ends of said passage being of a given cross-sectional area and tapering to a smaller cross-sectional area at the center, tapered plugs for insertion in the ends of said passage, said pintle having slit ends so as to permit expansion of the same upon insertion of said plugs, one of said plugs having a hole therein sufficient to receive a tool for driving out the other plug.

6. For use in a mining machine chain, a pintle having a longitudinal circular passage therethrough from end to end, the ends of said passage being of a given cross-sectional area and tapering to a smaller cross-sectional area at the center, tapered plugs for insertion in the ends of said passage, means in said pintle for permitting expansion of at least the ends thereof upon insertion of said plugs.

7. For use in a mining machine chain, a pintle having a longitudinal circular passage therethrough fromend to end, the ends of said passage being of a given cross-sectional area and tapering to a smaller cross-sectional area at the center, tapered plugs for insertion in the ends of said passage, said pintle having a longitudinal slot in the side thereof communicating with the passage to permit expansion of the pintle upon insertion of said plugs.

8. For use in a mining machine chain, a pintle having a longitudinal passage therein, said passage tapering from each end toward the center, a flattened portion on the side of said pintle and running substantially its full length, a slot in said flattened portion communicating with said passage and tapered plugs for insertion in said passage ends for expanding said pintle to prevent longitudinal movement thereof.

9. For use in a mining machine, a pintle in the form of a cylinder having a longitudinal flattened portion and an internal channel throughout its length, a longitudinal groove in the flattened portion and communicating with said channel, and means for expanding said pintle.

10. A pintle comprising a circular bar having a longitudinal flat face and a channel running therethrough, a slot connecting said face with said channel and wedging means for expanding said pintle.

11. For use in a mining machine, a pintle in the form of a cylinder having a longitudinal flattened portion and an internal channel throughout its length, a longitudinal groove in the fiattened portion and communicating with said channel, and means comprising a wedge for expanding said pintle.

EDWIN P. STENGER.