US2121044A - Cutter chain - Google Patents

Description

W. NOBLE CUTTER CHAiN Julie 21, 1938.

Filed Nov. 27, 1934' 2 Sheets- Sheet 1 June 21, 1938.

-W,NOBLEQ 2,121,044 1 CUTTER CHAIN Filed Nov. 27, 1934' 2 Sheets-Sheet 2 V 'I 5 n Patented June 21. 1938 PATENT OFFICE CUTTER CHAIN WarrenNoble, Michigan City, Indgassignor to Sullivan Machinery Company, a corporation of Massachusetts. 7 Application November 27 1934, Serial No. 755,013

a 22 "Claims. (or. 2262-933X 1 'I'hisinvention relates to cutter'chains, and. more particularly to improvements in a cutter chain especially designed. to use with a cutter bar of a coal mining machine.

An objecto-f thisinventio-n isqto provide an improved mining machine cutter chain. -Another. object is toprovide an improved cutter chain having improved cutter bit positioning and holding means. Yet another object is to provide an improved cutter bit Wherebmdue to its particular design, relatively long life is-insured, the a bit being of such shape as to possess-betterheat distribution: qualities. A still further object is .to provide an improved mounting means for'a' 1 5 cuttenbit of the abovercharacter whereby the bit may be supported in different"angularly-related positions withrespect to the bit block. Yet another object is to provide improvedreversiblebit block structure with'w'hichthe improved bit holding and adjusting. means is associated, whereby, by turning the holding and adjusting meansend for end Withrespectto the'bit block, the cutter chain may operate in, either direction. These and other'objectsliand advantages of the improved cutter chainwill, however, hereinafter more fully appear as the descriptionproceedsnfl In the accompanying drawings there are shown for purposes of illustration two forms which the invention may assume in practice. a In these drawings,: c Fig. 1- is a side elevational view of one illustrative form'of the improved cutterchainstr'uc- Fig. 2 is an end elevational viewof thecutter chain structure shown in Fig. 1. 1 l Fig. 3 is a view in. longitudinal section taken substantially on line 3-3 of Fig.2.. Fig. 4 is a cross'sectionalview taken on line 14 -4 of Fig. 1. g

5 is a perspective viewfof the: bit clamp element. f Fig. 6 is a perspective viewof the-bit positioning and supporting element. 4 Fig. 7 is a perspectiveviewof the] improved cutterbit, f 45 i Fig. 8 is a view similar to Fig. l'showing a modified form of constructioni 1 Fig. 9 is an endelevational View uns cutter chain structure'shown in Fig. f Fig. 1 is a view in "longitudinal section'taken substantially on linefl0-l0 of-Fig. 9. f it Fig. 11 is a detail sectional View taken 'njnne of Fig. 8. I Figs. 12 and 13 are side and end'elevationalviews respectively, of the bit. positioning and supporting element.

sides of a'right-angled dihedral angletoprovide Figs. 14 and 15 are side and end elevational viewsrespectively, of the bit clamping element. fIn the illustrative embodiment of the inventiondisclosed in Figs. 1 to 7, inclusive there is shown a bit block La series of which are adapted to be pivotally connected together in end to end relation by suitable strap links orotherwise to form an endless cutter chain ma wellkno-wn manner. Formed integralwiththe bit block I is a projecting boss or'lug 2 having a longitudinal bore 3- formed with its: interior periphery ser ratedatA Mounted in this bore 3 is the cylindrical shank Sof a bit positioning and supporting element 6, the exterior periphery of the shank E being formed with longitudinal teeth engageable with the serrations formed in the wallsoi'thebore 3 for-locking the shankagainst angular displacement withinthe lug bore. As illustrated, the shank isaxially bored at 1 to 'receivefthebolt-like body portion 8 of a bit clamping element 9; The rear end of this bolt portion is threadedfat ID to receive a tightening nut llengageable with the rear-surface of the.

lug 2. The bolt portion 8 is preferably'annularly grooved at l.2- to receive a snap ring l3 for preventing inadvertent release of the nut H from the'bolth v v The improved cutterbit I4, as shown in Figs. 3 and -7, is of the so-called detachable type and preferablyin the form of a stamping pressed to the desired shape and hardened to attain relatively great wearing qualities, and is,-ln this instanca'preferably of V'-shaped cross section ha'v-' ing its end cutting faces l5 lying in the plane .cuttingportionsat the opposite bit ends. The

end portions [6 of the bit are inwardly bentyas shown in Fig. '3, to obtain relatively great strength at the cutting point. It will. thus be seen that the cutter bit is reversible so that when one'cuttingpoint becomes dull, the bit maybe turned end for end relative to its holding means, thereby to present afresh cutting point to the Work. The bit is of a relatively inexpensive defsi'gn ,.and when 'bothcutting points become dull, it may be discarded and replaced by a new'bit. The bit positioning and supporting element 6 is provided with"apo=rtion l1 'projecting'iorwardly'and outwardly from its shank 5 and of tapering shape to provide ample support for the rearward portion of the bit body and formed 50 in its front face with an inclined ortapering *socket l 8 of V-sh'ape, within which the outer contour of the bitbody is'adapted to fitj Formed on the clamping-elementt is a forward and outthe serrated bore.

projection l9 engaging the intermediate portion of the forward surface of the bit body and cooperating with the portion I! of the supporting element to form an interfitting clamp in which the bit is firmly held. The elements I! and I9 of the bit holding and supporting means are of such shape as to provide ample clearance for the cutting portion of the bit. These elements, in certain instances, may be composed of cop-per or metals having similar heat conducting character istics for preventing concentration of heat at the cutting point of the bit, resulting in longer bit life. By the provision of the serrations within the longitudinal bore 3 and the teeth out on the shank of the element 6, it is possible to adjustthe bit supporting structure into different angularly related positions with'respect to the-bit block,

tion'but a single bit block pattern is needed to provide for all necessary bit positions. It will be evident, moreover, that the cutter bit may be firmly held in position on the bit block,

In the modified'form of constructionshown in Figs. 8 to 15, inclusive, there is shown a bit block 23-having longitudinally spaced lugs Hand 22 having alined bores '23 and 24 respectively, these bores having their inner peripheries serrated at 25. Arranged in the space between these two projecting lugs is a bit'supporting and position! ing element 26 having a forwardly projecting shank 21 extending within the bore 24 inthe lug 22' and having external teeth 28 engageable with the bore serrations for locking the shank 21 against angular movement within thefbit block lug. Engageable with the forward'surface of the rear lug 2| is an adjusting nut-29 having a circular projection 30 projecting within the lugged'bore 23 and having a smooth exterior surface of a diameter just permitting it to pass into Threadedly engaging -the nut 29 is a bolt portion 3| of a bit clamping element 32. 7 As shown in Fig. 11, the member 26 has- lateral projections 33, 33 engaging ledges 34 34 formed onthe member 32 for preventing angular outward tilting movement of the member 32 with respect to the member 26 and bitblocklug. Clamped between the members 26- and 32 is a cutter bit ,35 of the same general design-as that shown in Fig. '7, although in'this particular instance of somewhat greater length. 'The mem ber 32 has a bit supportingportion 3'! tapering forwardly and outwardly and having a V-shaped recess 38 in its forward face shaped to fit the outer contour of the bit block, while the rearward inclined portion of the member 26is-of y-shape to fit the inner contour of the bit body, andthese elements 26 and 32 cooperate to'form an interfitting clamp within which the bit bod'yisfirmly gripped. As in the form of the invention above described, the projecting. elements of the bit holding and clamping elements may be composed of. copper or similar metal to attain better heat distribution qualities.

The cutter bit may be supported in different angularly relatedpositions with respect to thebit blocksimply'by rotating the nut 29 to move it back (to the right in Fig. along the bolt portion 3 i removing the element 32 and bit from the bit block, withdrawing the toothed shank from engagement with the serrated bore 24 of the front lug and turning .the element 26 into-a difierentangularly related position with respect,

shaped to fit the inner contour of the bit, the l to the bit block. The toothed shank of the element 26 is then again inserted within the serrated bore 24, the bit placed in position between the assembled elements 26 and 32, as shown in Fig. 10, and the nut 23 thereafter rotated to bring the cylindrical projection 30 thereof Within the rear lug bore 23 and to clamp the parts firmly together. It will thus be seen that the cutter bit may be firmly held in position on the bit block and may be adjusted, as in the form of the invention above described, intodifierent angularly related positions with respect to the bit block to obtain lacing of the bits.

It will be noted that in both forms of the invention the bit positioning and holding struc- "ture may be turned end for end with respect to ing symmetrical in form so that the bit holding structure may be supported in either position. Also in 'either form of v:theinvention the cutter bit may have its walls longitudinally corrugated to obtain great rigidity in a bit of relatively thin structure, and furtherthe pping walls ofthe cooperating clamping elements may be roughened orserrated' to provide a better grip onthe bitp-In-certain instances the V-slot of the bit may be filled with copper to further improve the heat distribution ,of the bit; These. and other uses and advantages of the improved cutter chain will be clearly'apparent to those skilled in the'art. While there are in this application specifically described two forms which the'inventionmay assurne in practice, it will be understood that these forms of the'same are shown for. purposes of :illustration and that the'hinventi'on may be'further modified andembodi ed in various other forms without -';departing"1from its spirit or the' scop'e of the appende'dclaims.

What I claim aslnew' anddes'ire to secure by Letters Patent is:' 9 1. .A cutter bit having a straight body of 'V- shaped cross section and having at its opposite ends inwardly bent utting portions.

.2. A cutter ibit having a straight body and having itsopposite ends inwardly bent to "form oppositely inclined end cutting faces providing cutting points at the same side of the bit body. 3. A cutter bit having a straight body of WV shaped cross section, andop'positely inclined end cuttingfaces providing cutting points at the same side-of the bit body, the bit body at the bit points being inwardly bent. r

4; In a cutter chain, a series of articulated bitblocks each bit block having a longitudinal bore, the inner periphery of said bore. being serrated, a bit positioning and supporting element having a toothed shank insertibl'e. in said bore,

1 and a bit, holding element cooperating with said positioningand supporting element and engaging thebit for securing the ,bit in cuttingposition on said positioning and supporting element, the toothed shanks being insertible in difierent positions in different bit'block bores to obtain lacing ofthe bits. J.

5. In a cutter c'hain,'a series of articulated bit blocks each bit block having alongitudinal bore, the inner periphery ofsaid bore being serrated, a. bitpositioning andsupportingelement having a toothed shan k insertible insaid bore, and a cooperating bit clamping element for securing said bit positioning and supporting element in said bore and engaging the bit for clamping the bit ,in cutting position on said positioning and supporting element, the toothed shanks being insertible in different positions in different bit block bores to obtain lacing of the bits.

6. In a cutter chain, a bit block having a longitudinal bore, the inner periphery of said bore being serrated, a bit positioning and supporting element having a toothed shank insertible in. 'said bore, and a cooperating bit clamping element for securing said. bit positioning and supporting element in said bore, said toothed shank having an axial bore and said clamping element having a bolt-like portion projecting through said jaxial bore.

- '7. In a cutter chain, a bit block having a longitudinal bore, the inner periphery of said bore being serrated, a bit positioning and supporting element having a toothed shank insertible in said bore, and a cooperating bit clamping element for securing said bit positioning and supporting element in said bore, said toothed shank having an axial bore and said clamping element having a bolt-like portion projecting through said axial bore, said bolt-like portion being threaded to receive a tightening nut.

8. In a cutter chain, a bit block having longitudinally spaced lugs, said lugs having alined bores, the internal peripheries of said bores being serrated, a bit positioning and supporting element having a toothed shank insertible within the bore in the front lug, a bit clamping element, and an adjusting element cooperating with said'clamping element and having a portion projecting within the bore in the rear lug.

9. In a cutter chain, a bit block having longitudinally spaced lugs, said lugs having alined bores, a double-ended reversible cutter bit, and a bit holding and positioning means supported within the lug bores and providing an obliquely inclined socket for receiving the cutter bit for supporting the bit in an inclined position with its active cutting end projecting outwardly and forwardly from the bit block a substantial distance in advance of its inactive cutting end, said bit holding and positioning means adjustable relative to the bit block to move said cutter bit into different angularly related cuttingpositions, an element of said bit holding and positioning means having a locating portion engageable with riphery of the bore of the .front lug, said bit reversible end for end with respect to said holding and positioning means in any of aforesaid angularly related cutting positions.

10. In a cutter chain, a chain block having a bit lug, said lug having a bore, a cutter bit holder including a support element having a bit receiving socket and a tubular shank, said shank receivable in said lug bore, and a bit clamping element having a bolt-like body portion extending through said tubular shank and an integral forwardly projecting portion shaped to fit the forward surface of a cutter bit.

11. In a cutter bit and bit holder, a cutter bit having a body of V-shaped cross section, a bit positioning and holding element having a V- shaped socket for receiving the bit body and a tubular shank, and a bit clamping element for clamping the bit within said socket having a boltlike portion projecting through said tubular shank and an integral V-shaped projection adapted to fit within the bit body.

12. In a cutter chain, a bit block having a bore, a cutter bit holder for holding a cutter bit in position on said block including a support element having a bit receiving socket and a tubular shank insertible in said bit block bore, and a bit clamp- I gage a-cutte'r bit in said socket.

' i 13. In a cutter chain, a bit block having a bore, a cutter bit holder for holding a cutter-bit in position on saidblock including asup'port element having a bitreceiving socket and a tubular shank insertible in said bit block bore, and a'bit clamping element having a bolt-like body portion extending through said tubular shank,'and anintegral forwardly projecting portion shaped toengage a cutter bit insaid socket, said bolt-like portion having a threaded end'projecting through said tubular shank and a clamping nut threaded thereon. H

l4. In'a cutter bit and holder, a cutter bit having a body of V'-shapedcross section,"a bit positioning and holding element having a V-shaped socket for receiving the bit body, and an integral tubular shank, a. bit clamping element for clamp ing the bit within said socket having a bolt-like portion projecting through said tubular shank, and an integral V-shaped projection adapted to fit within the bit body, said bolt-like portion having a threaded end projecting through said tubular shank and a clamping nut threaded thereon. 15. In a cutter chain, a bit block having a lateral lug formed with a longitudinal bore, a bit holder having a tubular shank received in said lug bore, and a bit clamp having a body portion projecting through said tubular shank.

16. In a cutter chain, a bit block having a lateral lug formed with a longitudinal bore, a bit holder having a tubular shank received in said lug bore, a bit clamp having a body portion projecting through said tubular shank, and means co-' operating with said clamp body portion and said lug for clamping said bit holder in the lug bore.

17. In a cutter chain, a series of articulated bit blocks each bit block having a longitudinal bore,

the inner periphery of said bore formed with looking surfaces, and means for positioning and supporting the cutter bits in difierent positions on different blocks including bit clamps for supporting the bits independently of bit engagement with the blocks, said clamps each having a 'positioning and supporting element providedwith a shank insertible in a block bore and having locking surfaces engaging the block bore locking surfaces for locking the shanks against rotation in the bore, the shanks of said elements insertible in,

different positions in different bit block boresto obtain lacing of the bits on the chain. I I

18. In a cutter chain, a series of articulated bit blocks each bit block having a longitudinal bore, the inner periphery of said bore formed with looking surfaces, and means for positioning and supporting the cutter bits in different positions on different blocks including bit clamps for supporting the bits independently of bit engagement with the blocks, said clamps each having a positioning and supporting element provided with a.

shank insertible in a block bore and having looking surfaces engaging the block bore locking surfaces for locking the shanks against rotation in the bore, the shanks of' said elements insertible in different positions in different bit block bores to obtain lacing of the bits on the chain, said clamps also including a bit clamping element cooperating with said' positioning and supporting element for securing said positioning and sup-,- porting element in a block bore. p

19. A bit clamp comprising a clamping element having a bolt-like body portion and an integral forwa-rdly projecting portion V-shaped to fit the forward surface of aficutter of V-shaped cross section, and a cooperating clamp element having a tubular shank for receiving said bolt-like body portion and having a V-shaped slot for receiving the rearward surface of the cutter bit.

20. In a cutter bit holder, a support element having a bit receiving socket of V-shape for receiving the V-shaped body of a cutter bit, and a tubular shank, and a bit clamping element having 'a bolt-like body portion extending through said tubular shank and an integral forwardly projecting V-shaped portion shaped to engage the cutter bit in said socket.

21. In a cutter bit holder, a support element having a bit receiving socket of V-shape for receiving the V-shaped body of a cutter bit, and a tubular shank, and a bit clamping element having a bolt-like body portion extending through said tubular shank and an integral forwardly projecting portion 'V-shaped to engage the cutter-bit in said socket, said bolt-like body portion having a threaded end projecting through said tubular shank and a clamping nut threaded thereon.

22.'In a cutter chain, a chain block having a bit lug, said lug having a socket, a bit positioning and holding element having a tubular shank receivable in said lug socket, and a bit clamp having a portion receivable and movable axially in said tubular shank, and means for mov ing said clamp portion axially relative to said tubular shank to clamp a cutter bit in cutting position on said bit positioning and holding element. 1

WARREN NOBLE.

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