US3580639A - Cutter chain - Google Patents
Cutter chain Download PDFInfo
- Publication number
- US3580639A US3580639A US817346A US3580639DA US3580639A US 3580639 A US3580639 A US 3580639A US 817346 A US817346 A US 817346A US 3580639D A US3580639D A US 3580639DA US 3580639 A US3580639 A US 3580639A
- Authority
- US
- United States
- Prior art keywords
- links
- bit
- body portions
- cutter chain
- certain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000013011 mating Effects 0.000 description 11
- 238000005304 joining Methods 0.000 description 7
- 230000004323 axial length Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000004290 sodium methyl p-hydroxybenzoate Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
- E21C25/28—Chains or chain guides
Definitions
- CUTTER CHAIN Endless flexible cutter chains for mining coal and other minerals and materials comprise a plurality of links, some of which are adapted to support cutter bits in the variety of bit positions needed to cut a kerf.
- bit-supporting links require the use at least three forged, cast or machine pieces of cover all such bit positions.
- all the cutter bit supporting links including singleand double-bit links, are constructed from only two basic forgings or castings.
- the use of two basic components over three or more components previously taught has the advantages of less machining, less inventory, greater flexibility, and greater reliability.
- FIG. I is a side elevational view of a portion of a cutter chain having bit-supporting links therein constructed in accordance with the principles of this invention
- FIG. 2 is a side view of a combination bit-supporting head and leg link portion constructed in accordance with the principles of this invention
- FIG. 3 is an end view of the combination bit-supporting head and leg link portion shown in FIG. 2;
- FIG. 4 is an end view of a double-bit-supporting link con structed in accordance with the principles of this invention
- FIG. 5 is a side view of a bit link leg portion constructed in accordance with the principles of this invention.
- FIG. 6 is an end viewof the bit link leg portion shown in FIG. 5;
- FIG. 7 is an end view of a single-bit-supporting link constructed in accordance with the principles of this invention.
- FIG. 8 is an end view of a blank link constructed in accordance with the principles of'this invention.
- the cutter links 12 and connecting link 14 have respective aligned bores 16 and 17 therethrough for receiving well-known hinge pins 18 therein in any suitable manner for example a manner shown and illustrated in US. Pat. No. 2,802,369.
- Cutter links 12 are of any suitable form or construction to support or space cutter bits 48, in addition to being an integral part of the cutter chain.
- the positioning of cutter bits 48 with respect to adjacent links 12 is often varied to provide the desired particular bit pattern which is most effective in mining mineral.
- the cutter chain 10 can be comprised of any acceptable combination of the following cutter links; a double-bit-supporting cutter link 20 (FIG. 4); a single-bit-supporting cutter link 24 (FIG. 7); and a blank link 22 which has no provision thereon for bit-supporting means (FIG. 8).
- the cutter links 20, 22 and 24 can be constructed from two basic castings or forgings, namely; a combination bit-supporting head and leg link body portion or section 26 (FIG. 2 and 3); and/or a leg link section 28 (FIGS. 5 and 6).
- a combination bit-supporting head and leg link body portion or section 26 (FIG. 2 and 3); and/or a leg link section 28 (FIGS. 5 and 6).
- upper and lower and inward and out ward will refer, respectively, to the top and bottom and the right and left of respective link sections as viewed in FIGS. 2, 3, 5 and 6.
- cutter links 20, 22 and 24 include respective well-known inverted U shaped chain blocks ll, 11' and 11''.
- Chain blocks 11, I1 and. 11 comprise spaced downwardly extending parallel side or leg portions and a bridge section which extends transversely between such leg portions at the upper ends thereof (FIGS. 4, 7 and 8).
- bridge section which extends transversely between such leg portions at the upper ends thereof.
- Section 28 comprises an elongated downwardly extending leg portion 30 and an upper elongated inwardly projecting bridge portion 32.
- Bridge portion 32 is formed integrally with leg portion 30; has an axial length thereof less than the axial length of portion 30; and is axially symmetrical with respect to the vertical centerline of portion 30.
- Portion 32 has the outer side thereof in alignment with the outer side of portion 30 and projects inwardly therefrom such that the inner side on mating surface 34 thereof is offset inwardly from the inner side of portion 30.
- Such offset between surfaces 34 and the inner side of portion 30 is substantially equal to one-half of the space between the leg portions of a cutter link as hereinbefore described.
- a blank link 24 is constructed from two sections 28, one of such sections being turned with respect to the other.
- the turning of the one section 28 with respect to the other allows the alignment thereof for the joining of the two sections to form the blank link 24, such aligning including the leg portions 30 being parallel to one another and the lowermost surface of the leg portions 30 lying in the same transverse plane.
- the aligned sections 28 are positioned in preparation to the joining thereof at mating surfaces 34 such that the mating surfaces 34 thereof are either abutting and in exact alignment or slightly spaced or in exact alignment. After such positioning the sections 28 are joined at surfaces 34 thereof by an suitable welding technique whereby the resultant welded joint is of sufficient strength to withstand ordinary cutter chain forces applied thereto.
- Surfaces 34 may have to be finished prior to the welding thereof depending on the welding technique used.
- a preferred method of joining sections 28 is shown in a US. copending application Ser. No. 845,779, filed July 29, 1969 and assigned to the same assignee as is this invention wherein aligned sections 28 are positioned approximately 0.01 inches apart and joined at surfaces 34 by means of an autogenous welding technique such as electron beam welding.
- Section 26 comprises a plurality of portions formed integrally with one another consisting of; a lower elongated downwardly extending leg portion 36, an upper elongated circular cross section bit-supporting portion 38, and an upper elongated inwardly projecting bridge portion 40.
- the portion 38 has an axial length thereof less than the axial length of portion 36 and is generally axially and transversely symmetrical with respect to the vertical centerline of portion 36.
- Portion 40 has an axial length thereof equal to or less than the axial length of portion 38 and projects inwardly from portion 38 such that the inner side or mating surface 42 thereof is offset inwardly from the inner side of portion 36.
- Such offset between surface 42 and the inner side of portion 36 is substantially equal to one-half of the space between the leg portions of a cutter link as hereinbefore described.
- a double-bit supporting link 20 is constructed from two sections 26, one of such sections being turned 180 with respect to the other.
- the turning of one section 26 with respect to the other allows the alignment thereof for the joining of two sections to form the cutter link 20, such aligning including the leg portions 36 being parallel to one another and the lowermost surface of the leg portions 36 lying in the same transverse plane.
- the aligned sections 26 are positioned in preparation to the joining thereof at mating surfaces 42 such that the mating surfaces 42 thereof are either abutting and in exact alignment or slightly spaced and in exact alignment. After such positioning the sections 26 are joined at surfaces 42 thereof in a similar manner as hereinbefore described with reference to the construction of link 24.
- a single-bit cutter link 22 can be constructed from a link section 26 and a link section 28, one of the sections being turned 180 with respect to the other.
- the turning of one of the sections with respect to the other allows the alignment thereof for the joining of the two sections to form the single-bit cutter link 22, such aligning including the respective leg portions 30 and 36 being parallel to one another with the lowermost surface of portions 30 and 36 lying in the same transverse plane.
- the aligned sections 26 and 28 are positioned in preparation to the joining thereof at respective mating surfaces 42 and 34 such that the respective mating surfaces 42 and 34 are either abutting and in exact alignment or slightly spaced and in exact alignment. After such positioning the sections are joined at the mating surfaces thereof in a similar manner as hereinbefore described with reference to the described construction oflink 24.
- surfaces 42 and 34 can be of any suita ble shape which will develop a mating area sufficient to withstand the well-known bending and shear stresses which a cutter chain undergoes during the orbital cutting path thereof. As shown the mating'surfaces 42 and 34 have substantially deeper cross section at the central portions thereof than at the end portions thereof, thereby facilitating a material savings for the bending stresses are maximum at the central portions thereof.
- the bit-supporting cutter links and 22 are adapted to receive bits therein in any suitable manner and as shown a well-known cutter bit 48 of rectangular cross section is received within a generally vertically oriented aperture 46 of respective bit supporting portions 38.
- Aperture 46 is formed by initially-drilling a relatively large hole and enlarging such hole by broaching to receive the rectangular cross section cutter bit 48.
- the slope, if any, of an aperture 46 with respect to the normal of cutter links 20 and 22 is determined by the particular position of such links in the cutter chain 10.
- Cutter bits 48 are confined within aperture 46 in any suitable manner, for example, threaded keeper means 50 extend from the forward cutting end of links 22 through a longitudinally extending bore 52 in supporting portion 38. Bore 52 communicates between such forward end and the .lower portion of aperture 46.
- a bore 52 is provided on both sides of aperture 46 so that a section 26 can be used as either a leftor right-hand section without regard to the bore 52.
- a significant feature of this invention is that all the links of an endless cutter chain, including single and double cutter bit supporting links and blank links, are constructed from only two basic forgings or castings having generally equal leg portions and also respective bridge portions thereof which project inwardly from such leg portions substantially'equal distance.
- the cross-sectional configuration of portion 38 can be other than circular; aperture 46 and bit 48 can have a cross section thereof other than rectangular; a bit holder can be positioned in aperture 46 rather than bit; and, different bit-retaining means are contemplated.
- each link consisting of two body portions rigidly connected along a longitudinal plane in the bight portion thereof which plane extends generally in the same longitudinal and lateral directions as the side portions of said links; said body portions of certain of said links being dissimilar, one only of said body portions of each of said certain links having bit-receiving means therein; and said body portions of other of said links being identical with respect to each other and identical to one of said body portions of said certain links.
- bit-receiving means include a generally vertically oriented aperture within an elongated upper bit-receiving portion of said one only of said body portions of said certain links and said aperture receives the shank portion of a cutter bit therein.
- An endless cutter chain as specified in claim 5 wherein substantially longitudinally extending bores in said upper bitreceiving portion communicate between respective axial ends of said upper bit-receiving portion and said aperture and only one of said longitudinally extending bores in each respective bit-receiving portion has a bit retaining means therein.
- each link consisting of two body portions rigidly connected along a longitudinal plane in the bight portion thereof which plane extends generally in the same longitudinal and lateral directions as the side portions of said links; said body portions of certain of said links being dissimilar, one only of said body portions of each of said certain links having bit-receiving means therein; and said body portions of all other of said links being identical with respect to each other and identical to said one only of said body portions.
- bit-receiving means include a generally vertically oriented aperture within an elongated upper bit receiving portion of said one only of said body portions of said certain links and said aperture receives the shank portion of a cutter bit therein.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
Description
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81734669A | 1969-04-18 | 1969-04-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3580639A true US3580639A (en) | 1971-05-25 |
Family
ID=25222878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US817346A Expired - Lifetime US3580639A (en) | 1969-04-18 | 1969-04-18 | Cutter chain |
Country Status (1)
Country | Link |
---|---|
US (1) | US3580639A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB391901A (en) * | 1931-12-15 | 1933-05-11 | John Robert Vernon Dolphin | Improvements in or relating to mining machine cutter chains |
US1932948A (en) * | 1933-01-17 | 1933-10-31 | Anderson Boyes & Co Ltd | Cutter chain for coal-cutting machines |
US2398107A (en) * | 1941-01-15 | 1946-04-09 | Bowdil Company | Mining machine chain lug |
-
1969
- 1969-04-18 US US817346A patent/US3580639A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB391901A (en) * | 1931-12-15 | 1933-05-11 | John Robert Vernon Dolphin | Improvements in or relating to mining machine cutter chains |
US1932948A (en) * | 1933-01-17 | 1933-10-31 | Anderson Boyes & Co Ltd | Cutter chain for coal-cutting machines |
US2398107A (en) * | 1941-01-15 | 1946-04-09 | Bowdil Company | Mining machine chain lug |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JOY TECHNOLOGIES INC., A CORP. OF DE.,PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOY MANUFACTURING COMPANY, A CORP. OF PA;REEL/FRAME:004880/0430 Effective date: 19870529 Owner name: JOY TECHNOLOGIES INC., 301 GRANT STREET, PITTSBURG Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY MANUFACTURING COMPANY, A CORP. OF PA;REEL/FRAME:004880/0430 Effective date: 19870529 Owner name: JOY MANUFACTURING COMPANY, 535 SMITHFIELD STREET, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MITCHELL, RALPH W.,;REEL/FRAME:004718/0975 Effective date: 19690416 |
|
AS | Assignment |
Owner name: JOY TECHNOLOGIES INC., PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOY MANUFACTURING COMPANY, A CORP. OF PA;REEL/FRAME:004747/0261 Effective date: 19870626 Owner name: CITIBANK, N.A.,NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOY TECHNOLOGIES INC., 301 GRANT STREET, PITTSBURGH, PA 15219, A DE CORP.;REEL/FRAME:004846/0025 Effective date: 19870626 Owner name: CITIBANK, N.A., 641 LEXINGTON AVENUE, NEW YORK, NE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY TECHNOLOGIES INC., 301 GRANT STREET, PITTSBURGH, PA 15219, A DE CORP.;REEL/FRAME:004846/0025 Effective date: 19870626 Owner name: JOY TECHNOLOGIES INC., 301 GRANT STREET, PITTSBURG Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY MANUFACTURING COMPANY, A CORP. OF PA;REEL/FRAME:004747/0261 Effective date: 19870626 |
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AS | Assignment |
Owner name: JOY MANUFACTURING COMPANY,STATELESS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOY TECHNOLOGIES INCL., (A DE CORP.);REEL/FRAME:004827/0367 Effective date: 19870626 Owner name: JOY MANUFACTURING COMPANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE DATE;ASSIGNOR:JOY TECHNOLOGIES INCL., (A DE CORP.);REEL/FRAME:004827/0367 Effective date: 19870626 |
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AS | Assignment |
Owner name: CITIBANK, N.A., 641 LEXINGTON AVENUE, NEW YORK, NE Free format text: SECURITY INTEREST;ASSIGNOR:JOY TECHNOLOGIES INC.,;REEL/FRAME:004936/0730 Effective date: 19870626 |
|
AS | Assignment |
Owner name: JOY TECHNOLOGIES INC., A CORP OF DE, PENNSYLVANIA Free format text: RELEASED BY SECURED PARTY;ASSIGNORS:MC CARTNEY, DEREK L.;ARCHIBALD, JOHN H.;REEL/FRAME:005237/0152 Effective date: 19870626 |
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AS | Assignment |
Owner name: JOY TECHNOLOGIES, INC., A CORP OF DE Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITIBANK N.A.;REEL/FRAME:005237/0187 Effective date: 19891011 |