US2612361A - Mining machine - Google Patents

Description

L. D. HAGENBOOK Sept. 30, 1952 MINING MACHINE Filed March 1e, 1951 3 Sheets-Sheet 1 llllllll 4D111 f'bl QM Ar 0 M ,(10 R n o mw W ,WMZ f W .M ,Y 2D

Slept. 30, 1952 l.. D. HAGENBooK 2,612,361

MINING MACHINE Filed March 16, 1951 Sheets-Sheet 2 INVENTOR.

` $01411 Hagenbook Q ,314mm Ar ron/v5 x Sept- 30, 1952 L.. D. HAGENBooK 2,612,361

MINING MACHINE Filed Maren 16, 1951 :s sheets-sheet 5 IN V EN TOR.

firme/vf Y Patented Sept. 30, Y 1952 MINING MACHINE Loy Dale Hagenbook, Chicago, Ill., assignor to 4Goodman Manufacturing Company, Chicago,

Ill., a corporation of Illinois f Application March 16, 1S51, Serial No. 216,056

6 Claims. (Cl. 262-9) This invention relates to improvements in cutting heads for mining machines and, more particularly, to drum-type cutting heads especially adapted for coal cutting machines of` the continuous cutter type, wherein the coal is removed from the solid face without previous blasting The principal object of the invention is to provide a drum-type cutting head having a bitcarrying drum with cutter chains at its opposite ends, and with gear means for driving the drum from said cutter chains at a lesser speed than the cutter chains so as to remove the coal from the working face in larger lumps.

A further object of the invention is to provide means for rotating the bit-carrying drum in an opposite direction to that of the cutter chains so as to tend to neutralize the torque imposed upon the main frame oi. the cutting machine from the cutter head, due to the reactionV of `the coal ag-ainst the cutter bits.

Other objects and advantages of the present invention will appear from time to time as the following description proceeds.

The invention may best be understood by reference to. the accompanying drawings, in which:

Figure 1 is 4a fragmentary top plan view di. the front end of a drum-type cutter head constructed in accordance with my invention, with parts broken away and with one end of the drum shown in horizontal section; v-

Figure 2 is a side view of the cutter head shown in Figure 1, drawn to a smaller scale and showing part of the side plate brokenv away and with 'parts of the drum shown in section;

Figure 3 is a detailed section taken on line 3 3 of Figure 1, but drawn to the same scale as Figure 2;

Figure 4 is an expanded composite view in perspective of the parts of the planetary gearing at one end of the drum; l K

Figure 5 is a fragmentary perspective view of one of the bits or picks carried on the drum.

The cutter head of the present invention is of the drum type particularly adapted for use in continuous mining machines of the kind illustrated in the copending application of Lindgren and Lundquist bearing Serial Number 186,326. Cutter heads of the general type referred to are usually mounted for vertical swinging movement at the frontend of a continuous cutter mining machine, with the drum disposed on a horizontal axis. It will be understood, as the following description proceeds however, that the cutter head of the present invention is not necessarily limited for use on machines in which the cutter head is mounted for vertical swinging movement but that the principal' features of the invention may also be applied to a cutter head which lis advanced or sumped forwardly while' held against swinging movement, or with its axis disposed either horizontally or vertically.

Referring now to details of the form of ycutter head indicated generally at I0 in the drawings, said head is carried on a pair of spaced parallel side bars II, II which extend to a suitable support or base of a mining machine (not shown). such as that shown in the copending application of Lindgren and Lundquist hereinabove referred to. The side bars Il, include chain guides I2, I2 along their upper and lower edges for receiving endless cutter chains I3, I3 which may be of conventional form including a plurality of cutter blocks I4, I4 and connecting links I5, I5. Cutter bits It, I5 are mounted in the cutter blocks I4, I4 and extend at varying angles thereto, as usual, to cut relatively wide kerfs along opposite sides of the cutter head, as indicated in Figure 1.

The side bars I I have telescopically adjustable end plates I1 at their forward ends extensible longitudinally of the Iside bars as by bolts I8, I8 and nuts I9, I9 to vary the tension on the cutter chains, as usual. The adjustable end plates I'I provide bearing support for a cross shaft 20 having reduced splined end portions 2|, 2| tting'in bosses 22 projecting inwardly from the inner sides of said end plates. The splined end portions 2|, 2| of saidtransverse shaft are held in place by .bolts 23 countersunk in and passing through the outer faces of the end plates I'I.

A rotatable bit-carrying member, indicated generally at 25, is rotatably mounted on the cross shaft 29. Said member consi-sts of a hollow drum having a plurality of cutter bits or picks 26 on bit supports 21 mounted in staggered relation to each other and formed integrally with and projecting from the surface of the drum. In the preferred form shown, the bits 26, 26 each consists of a pick-like body including a base 28 and a tapering, curved, pick-like end portion 29. The base 35 of each bit has a tapered shank 30 seated in and passing through its bit support 21 in a direction substantially tangential to the drum, as shown in Figures 2 and 3. Each base also has a attened under surface 3| adapted for seating engagement on a forward projection 3,2 of the bit support 21 to hold the bit against twisting movement in said support. v

The bit Shanks 3|] are held in place by bolts 33 threaded on the rear end of its shank and engaging the rear face of its bit support 21. All the arcuate bits 26 project in the same direction generally tangential to, but at a slight outwardly projecting angle to, the surface of the drum, so as to present, in effect, a series of picks in staggered spaced relation for successively engaging 'the coal .face as ther drum is rotated in the direcof the cutter head. The means for effectingthis reversed rotation of the cutter chains I3 and the drum may now loedescribed as follows:

Each o'f the cutter chains I3 passes around va chain .sprocket 34 having a 'hub `-35. The 'hub '35 is .splined 'along its inner end on an annular sleeve 36 having a recessed'outer end portion 31 rotatably mounted on the boss 22 o'f the adjacent endpla'te I1 by an anti-'friction `bearing 38. The sleeve 36 also has an integralfdrive pinion .-29 of reduced diameter separated from the cross shaft 2'0. .by a Ebushing -40 and 'having gear teeth 4I thereon. .A spider S43 is keyed -as at M on an intermediate portion 45 'of the .cross shaft '20 and has `a plurality of Agears '146, '46' rotatably :mounted thereon `in meshing engagement on their outer peripheries with 'teeth -41' Aformed around .the interiorfof a 'sleeve 48. The latter :sleeve is keyed as, at 49 to the `interior of -the drum :2'5l adjacent its outer The drum 2.5 .has suitable bearing support on the fcross shaft i211, vin `the :form shown said drum being provided with 'a plurality of inwardly extending annular ribs 5U supported 4vby anti-.friction roller Jbearings :5I `on the hub .of the spider '43'.

The .ends 'of the :drum 2.5 are `'closed iby annular fendv plates'53 havmg `'sealing :rings `5t `on their 4inner peripherlesv engaging the hubs '35 of the. drive rchaizn sprockets34. "The anti-friction bearings 38in :sleeves 13B are .closed by a 'sealing ring 5.5 mounted for rotation within the .sprockets 34 :and abuttingfthe `end vfaces of'the sleeves 36. The use and operation of .the :cutter head is asioilows.:

'The cutter chains I3, i3 'are ydriven in unison by. power `from any suitable ldriveconnections on the 'mining machine icnotshown) so as to pass about .their drive vsprockets .34 in :a .clockwise .direction .shown 'in `Figure '2. -As will :be .seen in Figure l, said `:cutter .chains withitheir 'bits 1.6., '11.6 project `forwardly beyond thexcylindrical surface of the '.25 at .opposite-ends ofthe latter so as to .cut well-deiined kerfs, .as indicated :at .A in Figure 1, whenthe .cutter head i'smoved into cutting engagement against the Working' ."f'ace. The :chain sprockets -34 are drivenin .unison by the rcutter chains to 'rotate-'the drive 'pinio-rrs 39. The gears 4B in spider. 43 -act es reach .gears to transmit :power to the :sleeves 548 which arekeyed tothev drum, iso .as 'to wta'texthe drum in Sa .directiun :opposite to the direction of rotation .of the chain :sprockets T34. Due to the difference in pitch vdiameter'of the drive pinions "39 .and thev internalgear teeth l4'! yof vsleeves 48, .the .drum will be driven at a 'lesser peripheral .speed than :that of the chain -sprockets 34 and the-cutter chains I`3carried thereby.

26 carried on the drum are arranged As a result of this reversal of rotation of the drum and the reduction in speed of the latter with respect to the cutter chains, the pick points or .bits 26 carried on the drum will attack the coal at a reduced speed as compared to the normal cutting action of the cutter bits I6 on the cutter chains, so as to tend to dislodge the coal in considerably larger lumps than in previous drum-type cutter heads, where cutter ,bits are mounted on the drum and move at substantially the same peripheral speed as the cutter chains.

It will further be understood that the arrangement, whereby the drum and its bits rotate in reverse'direction to that of the cutter chains, tendsfto minimize the torque eiective upon the cutter head as a whole due to the reaction of the -fcoaltas .it is engaged by the cutter bits. With the arrangement of the present invention, the reaction on the cutting bits of the cutter chain and the reaction on the cutting bits of the drum tend -to balance-eachother soas to stabilize the cutterhea'd-asa `whole and reduce to a large degree the torquetransmitted to the main frame of thetmachine while .it i-s'fin operation.

1itilthougln. I: have shown .and described certain embodimentszormyinvention, it will be understood that IL-dotnet 'wis-h tolse-limited to the exact consin'uetion'sliown'andzdescribed, but that various changes .and modicationsmay be made withoutdeparingfmmtthe spirit and scope of themventiorrfas 'deliri-ed in the appended claims.

I claim:

l. In a cutter headl for mining machines, a rof spaced zsidepbars having power-driven cutter chains-.guidedior 'orbital .movement thereabout, :a .rotatable bitcarrying member disposed transverselyv between the forward ends of said side bars..1and gearing operatively connecting the fchains withthe rotatable :member for driving the latter in reverse direction to said cutter chains.'

2L A' cutterhea'd in'accordance with `claim l, wherein the gearing operatively connecting the chains `with the rotatable member also drives the member fat a less peripheralspeed than that of thecutter'chains astheypass vabout the opposite ends :of said' member.

3. A cutter, :head1-n zacoordance with claim 1, wherein 4the gearing for driving the rotatable member includes chain sprockets rotatably supported by said: sidev frames concentrically with theirotatable .naemlich-and with cutter bits on saideutter chains projecting .radially beyond the cutter bits on said rotatable member.

4. Acutter .head in accordance. with claim 2, wherein the gearing 4for l-driving the rotatable member includes a chain sprocket rotatably supported `on thesde frames, a pinion driven by said sprocket, `a .reach `gear ,supported eccentrically of said pinion and driven thereby, and an internal gear .xed vto..said.rotatable member and driven by `said reach. gear.

15. A -.cutter head .accordance with claim 4, wherein therotatable member consists of a hollow drum, and .the pinion, reach gear and internalv gear are ldisposed. within .said drum.

ii .aout'ter head in .accordance with claim 5, whereinlthe side frames are rigidly connected by a tie .rod .passingthrough the rotatable member, and the chain sprockets, pinion, .reach gear support and'. drum .are-supported on said tie rod.

LOYDALE 'HAGENBOO-K.

No reerences cited.

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