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US3727848A - Hammer mill with replaceable spider arm tips - Google Patents

Hammer mill with replaceable spider arm tips Download PDF

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Publication number
US3727848A
US3727848A US00206631A US3727848DA US3727848A US 3727848 A US3727848 A US 3727848A US 00206631 A US00206631 A US 00206631A US 3727848D A US3727848D A US 3727848DA US 3727848 A US3727848 A US 3727848A
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US
United States
Prior art keywords
socket
tip
web portion
replaceable
mill
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
Application number
US00206631A
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English (en)
Inventor
T Francis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIVGER STEEL CASTING CO
Original Assignee
SIVGER STEEL CASTING CO
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SIVGER STEEL CASTING CO filed Critical SIVGER STEEL CASTING CO
Application granted granted Critical
Publication of US3727848A publication Critical patent/US3727848A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/13—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft and combined with sifting devices, e.g. for making powdered fuel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C2018/188—Stationary counter-knives; Mountings thereof

Definitions

  • SHEET '4 [IF 4 HAMMER MILL WITH REPLACEABLE SPlDElR ARM TIIPS This invention relates to hammer mills and especially to heavy duty hammer mills such as those employed to break up discarded automobile bodies.
  • One of the main parts of a hammer mill is its rotary hammer assembly which comprises a series of axially adjacent spiders mounted on a shaft which has its end portions journalled in bearings in the opposite side' walls of the mill. Between and mounted on the outer end portions of the spider arms are freely swinging hammers that coact with stationary comb teeth and grate bars spaced circumferentially around part of the orbit of the hammers-to fragmentize whatever is fed into the mill.
  • this invention has as its object to provide readily replaceable protective tips for the outer end portions of the spider arms, and a way of attaching the tips to the arms that is secure and yet leaves the tips readily removable.
  • the present invention does not affect the width of the hammers. Instead it provides a protective tip that has a shroud portion no wider than the spider arm, shaped to fit the extremity of the arm and its adjacent leading edge portion (with reference to the direction of rotation of the hammer assembly during operation of the mill).
  • This protective tip is detachably secured to the spider arm in a manner which to some extent resembles a mortise and tension joint, with the tenon in the form of a web projecting from the inner surface of the shroud and entering a socket (the mortise) in the spider arm through the mouth of the socket which opens the leading edge of the arm.
  • Another feature of the invention is the use of the same means that mounts the swinging hammers between the end portions of the spider arms to also prevent unintentional displacement of the protective tips from the spider arms, so that whenever the hammers are replaced, the protective tips can likewise be replaced, if needed, without entailing additional time to do so.
  • FIG. 1 is a vertical sectional view through a hammer mill embodying this invention
  • FIG. 2 is a perspective view of a portion of the hammer assembly of the mill
  • FIG. 3 is an enlarged view of an end portion of one of the spider arms, with the protective tip of this invention applied thereto;
  • FIG. 4 is a sectional view through FIG. 3 on the plane of the line 4-4;
  • FIG. 5 is a perspective view of the end portion of a spider arm and a protective tip therefor, showing the same disassembled.
  • the numeral 8 designates generally the fragmentizing chamber ofa hammer mill which, as is customary, has a rotary hammer assembly 9 mounted therein.
  • the hammer assembly 9 comprises a series of fourarmed spiders 10 mounted on and keyed to a shaft 11 which is journalled in bearings (not shown) that are structurally supported in the side walls of the mill.
  • the two pairs of diametrically opposite arms 12 of each spider are axially offset from one another, and the spiders are all similarly mounted on the shaft.
  • the circumferentially adjacent arms of the entire series of spiders are axially offset, as are also the spaces between their outer end portions.
  • hammers 13 are freely swingingly mounted on shafts 14 that extend through aligned holes in the spider arms.
  • the hammers coact with the teeth of a rigidly mounted cutting comb 15 that extends lengthwise of the hammer assembly and with grate bars 16 that are circumferentially spaced around part of the orbit of the hammers, to break up any material entering the mill through its inlet chute 17.
  • the pieces or fragments into which the mill brakes the incoming material fall through the spaces between the grate bars and onto a delivery conveyor 18 which carries them out of the mill. Since the invention is not concerned with the structure of the mill generally, there is no need to illustrate or describe the same beyond the extent shown in FIG. 1, which can be taken as exemplary of specifically different mill designs to which this invention is applicable.
  • the purpose of this invention is to eliminate the need for repairing the worn spider arms of the rotary hammer assembly by sputtering molten steel onto the worn surfaces, by providing replaceable caps or tips 19 for the spider arms, and attaching them to the arms in a manner which requires no change in the design of the hammer assembly beyond providing the outer end portion of its spider arms with sockets 20.
  • the caps or replaceable tips 19 which are all alike and preferably castings have a crescent-shaped shroud portion 21 shaped to fit the outer extremity of any spider arm and its adjacent leading edge portion, with reference to the direction of rotation of the hammer assembly during operation of the mill.
  • Attachment of the replaceable tips to the spider arms is effected in each instance, by inserting a web 22 that projects from the inner surface of the crescent-shaped shroud portion, into the socket of the spider arm to which the tip is to be attached. Both the socket and the web are symmetrically located with respect to the thickness of the spider arms and the width of the tips, and since the width of the shroud portion of the tips is the same as the thickness of the spider arms, the side edges of the shroud portion are flush with the axially opposite faces of the spider arms, as seen in FIG. 4.
  • the mouths 23 of the sockets 20 not only open to the leading edge 24 of the spider arms, but also to the extremities thereof so that the web 22 can be integrally joined to the shroud portion along the entire length thereof.
  • the abutments on the spider arms are provided by opposite sides 26 and 27 ofa boss or pad 28 rising from the inner face of each socket side wall 25 around a hole 29 therein, and the coacting abutments on the web 22 are formed by shoulders 30 and 31 that result from having the medial portion 32 of the web reduced in thickness.
  • This medial portion of the web has a hole 33 therein which is of the same size as the hole 29 in the side walls of the socket, and so located that upon complete insertion of the web into the socket the holes 29 and 33 align with one another.
  • the abutments 27 and 31 extend along straight lines transversely of the spider arms and are substantially bisected by a plane represented by the line L--L in FIG. 3 containing the axes of the rotary hammer assembly and the aligned holes 29 and 33. Accordingly, the interengagement of these abutments carries the thrust imposed upon the cap or tip by centrifugal force. Also, as seen in FIG. 3, the straight lines on which all surfaces of the interengaging abutments 27 and 31 lie are so inclined with respect to the aforesaid plane that centrifugal force acting on the cap or tip tends to draw its web into the socket. Displacement of the caps or tips from the spider arms on which they are located by centrifugal force is thus most dependably and securely prevented.
  • each of these shafts preferably consists of two end-to-end sections or lengths that are assembled with the rotary hammer assembly from the op posite ends thereof through appropriately located holes in the side walls of the mill.
  • the improvement by which the spider arm extremities and adjacent surfaces of the arms are protected against such wear comprises:
  • each replaceable protective tip having 1. a generally crescent-shaped shroud portion which in the operative position of the protective tip embraces the extremity of the spider arm and an adjacent edge portion thereof, and
  • each of said replaceable protective tips is symmetrical to a plane bisecting the web portion thereof and parallel to its up posite faces.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Golf Clubs (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Chutes (AREA)
US00206631A 1971-12-10 1971-12-10 Hammer mill with replaceable spider arm tips Expired - Lifetime US3727848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20663171A 1971-12-10 1971-12-10

Publications (1)

Publication Number Publication Date
US3727848A true US3727848A (en) 1973-04-17

Family

ID=22767253

Family Applications (1)

Application Number Title Priority Date Filing Date
US00206631A Expired - Lifetime US3727848A (en) 1971-12-10 1971-12-10 Hammer mill with replaceable spider arm tips

Country Status (7)

Country Link
US (1) US3727848A (es)
CA (1) CA963870A (es)
ES (1) ES407372A1 (es)
FR (1) FR2164146A5 (es)
GB (1) GB1409106A (es)
IT (1) IT975217B (es)
SE (1) SE389813B (es)

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844494A (en) * 1973-02-01 1974-10-29 Ferromet Inc Hammer mill rotor assembly
US3868064A (en) * 1973-02-23 1975-02-25 Dravo Corp Apparatus for reducing automobile bodies and other waste to usable scrap
US4000859A (en) * 1976-02-09 1977-01-04 Sivyer Steel Corporation Two-piece hammer
US4056232A (en) * 1975-03-17 1977-11-01 Lindemann Maschinenfabrik Gmbh Protective device for rotary hammer breaker
US4061277A (en) * 1976-09-20 1977-12-06 Sivyer Steel Corporation Shredder with grate cartridge
US4141512A (en) * 1978-01-09 1979-02-27 Adirondack Steel Specialties, A Division Of Adirondack Steel Casting Co., Inc. Construction of a hammer for hammer mill
US4202504A (en) * 1978-07-14 1980-05-13 Copper Alloys Corp. Two-piece hammers for hammer mills
US4222530A (en) * 1979-02-28 1980-09-16 Sivyer Steel Corporation Replaceable protective means for end disc of shredder
US4290545A (en) * 1979-02-28 1981-09-22 Sivyer Steel Corporation Method of attaching a protective cap to a shredder component
US4313575A (en) * 1978-03-03 1982-02-02 Pettibone Corporation Caps for hammermill rotors secured by individually-removable paired pin assemblies
FR2522536A1 (fr) * 1983-03-02 1983-09-09 Newell Manufacturing Cy Broyeur a marteaux equipe d'un rotor a disques proteges par des calottes, pour le dechiquetage d'objets metalliques
US4406415A (en) * 1981-07-06 1983-09-27 Greer Jack B Rotor assembly for hammermills
US4519551A (en) * 1983-06-07 1985-05-28 Sivyer Steel Corporation Replaceable protective caps for spider arms of a reversible hammer mill
US4558826A (en) * 1982-07-12 1985-12-17 Evans Products Company Hammer for automobile shredding mills
DE3438706A1 (de) 1984-10-23 1986-04-24 Albert Hoffmann Kg, 5180 Eschweiler Vorrichtung zur zerkleinerung von blech und aehnlichem material
US4619029A (en) * 1982-03-03 1986-10-28 Newell Industries, Inc. Method of retrofitting a hammer mill rotor
US4650129A (en) * 1982-03-03 1987-03-17 Newell Industries, Inc. Capped disc for hammer mill rotor
GB2186504A (en) * 1986-02-13 1987-08-19 Roxon Oy Hammer crusher
DE3709799C1 (en) * 1987-03-25 1988-03-17 Thyssen Industrie Cap for the ends of the carrying bodies of a hammer crusher rotor
FR2612804A1 (fr) * 1987-03-25 1988-09-30 Thyssen Industrie Rotor pour concasseur a marteaux
DE3721961C1 (de) * 1987-07-03 1988-11-17 Thyssen Industrie Kappe fuer die allseitige UEberdeckung der Enden der Tragkoerper eines Hammerbrecherrotors
FR2619517A1 (fr) * 1987-08-21 1989-02-24 Thyssen Industrie Fixation de coiffe aux extremites des corps porteurs de marteaux d'un rotor de concasseur
US4915310A (en) * 1988-11-02 1990-04-10 Sivyer Steel Corporation Replaceable end cap assembly for the spider arm of a hammermill
US4973005A (en) * 1988-11-10 1990-11-27 Usines Et Acieries De Sambre Et Meuse Hammer-crusher rotor
DE3938725A1 (de) * 1989-11-23 1991-05-29 Lindemann Maschfab Gmbh Rotor fuer eine zerkleinerungsmaschine und schutzkappen fuer den rotor
US5072888A (en) * 1989-12-20 1991-12-17 Sivyer Steel Corporation Symmetrical protective cap for a rotary hammer assembly for a hammermill
US5141167A (en) * 1991-05-28 1992-08-25 Slvyer Steel Corporation Heavy duty disc-spider assembly for a hammermill
US5169077A (en) * 1988-11-02 1992-12-08 Sivyer Steel Corporation Replaceable end member for a hammermill spider
US5598981A (en) * 1993-09-09 1997-02-04 Sivyer Steel Corporation Hammermill
USD426556S (en) * 1997-12-08 2000-06-13 Sivyer Steel Corporation Metal shredder hammer
WO2003018202A1 (en) * 2001-08-31 2003-03-06 Timberline Environmental Services Rotating cutter head and cutter head assembly
US6763566B1 (en) * 1999-06-17 2004-07-20 Metso Lindemann Gmbh Method and device for demounting/remounting hammers, hammer axles and/or protective caps of rotors of hammer crushers
US20060226269A1 (en) * 2005-04-12 2006-10-12 Riverside Engineering, Inc. Offset disc hammer assembly for a hammermill
CN103831148A (zh) * 2014-02-24 2014-06-04 常熟中材装备重型机械有限公司 转子机构改进的可逆式无篦子锤式破碎机
CN103831149A (zh) * 2014-02-24 2014-06-04 常熟中材装备重型机械有限公司 锤式破碎机的转子结构
CN103831147A (zh) * 2014-02-24 2014-06-04 常熟中材装备重型机械有限公司 可逆式无篦子锤式破碎机
USD731564S1 (en) * 2013-05-17 2015-06-09 Esco Corporatio Hammer for shredding machines
CN105498908A (zh) * 2015-12-31 2016-04-20 四川先为机械有限公司 锤式破碎机的自保护转子
US10471435B2 (en) 2012-05-18 2019-11-12 Esco Group Llc Hammer for shredding machines
US20220190694A1 (en) * 2020-12-14 2022-06-16 Jason Sinkhorn Method of repairing a hydrogenerator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5350573U (es) * 1976-10-04 1978-04-28

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US268029A (en) * 1882-11-28 Pulverizing-mac mine
US2994486A (en) * 1959-11-02 1961-08-01 Poor & Co Renewable tip hammer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US268029A (en) * 1882-11-28 Pulverizing-mac mine
US2994486A (en) * 1959-11-02 1961-08-01 Poor & Co Renewable tip hammer

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844494A (en) * 1973-02-01 1974-10-29 Ferromet Inc Hammer mill rotor assembly
US3868064A (en) * 1973-02-23 1975-02-25 Dravo Corp Apparatus for reducing automobile bodies and other waste to usable scrap
US4056232A (en) * 1975-03-17 1977-11-01 Lindemann Maschinenfabrik Gmbh Protective device for rotary hammer breaker
US4000859A (en) * 1976-02-09 1977-01-04 Sivyer Steel Corporation Two-piece hammer
FR2340132A1 (fr) * 1976-02-09 1977-09-02 Sivyer Steel Corp Marteau en deux pieces
US4146184A (en) * 1976-09-20 1979-03-27 Sivyer Steel Corporation Shredder with grate door
US4061277A (en) * 1976-09-20 1977-12-06 Sivyer Steel Corporation Shredder with grate cartridge
US4141512A (en) * 1978-01-09 1979-02-27 Adirondack Steel Specialties, A Division Of Adirondack Steel Casting Co., Inc. Construction of a hammer for hammer mill
US4313575A (en) * 1978-03-03 1982-02-02 Pettibone Corporation Caps for hammermill rotors secured by individually-removable paired pin assemblies
US4202504A (en) * 1978-07-14 1980-05-13 Copper Alloys Corp. Two-piece hammers for hammer mills
US4222530A (en) * 1979-02-28 1980-09-16 Sivyer Steel Corporation Replaceable protective means for end disc of shredder
US4290545A (en) * 1979-02-28 1981-09-22 Sivyer Steel Corporation Method of attaching a protective cap to a shredder component
US4406415A (en) * 1981-07-06 1983-09-27 Greer Jack B Rotor assembly for hammermills
US4650129A (en) * 1982-03-03 1987-03-17 Newell Industries, Inc. Capped disc for hammer mill rotor
US4619029A (en) * 1982-03-03 1986-10-28 Newell Industries, Inc. Method of retrofitting a hammer mill rotor
US4558826A (en) * 1982-07-12 1985-12-17 Evans Products Company Hammer for automobile shredding mills
FR2522536A1 (fr) * 1983-03-02 1983-09-09 Newell Manufacturing Cy Broyeur a marteaux equipe d'un rotor a disques proteges par des calottes, pour le dechiquetage d'objets metalliques
US4519551A (en) * 1983-06-07 1985-05-28 Sivyer Steel Corporation Replaceable protective caps for spider arms of a reversible hammer mill
DE3438706A1 (de) 1984-10-23 1986-04-24 Albert Hoffmann Kg, 5180 Eschweiler Vorrichtung zur zerkleinerung von blech und aehnlichem material
AU595579B2 (en) * 1986-02-13 1990-04-05 Roxon Oy Hammer crusher
GB2186504A (en) * 1986-02-13 1987-08-19 Roxon Oy Hammer crusher
DE3709799C1 (en) * 1987-03-25 1988-03-17 Thyssen Industrie Cap for the ends of the carrying bodies of a hammer crusher rotor
FR2612804A1 (fr) * 1987-03-25 1988-09-30 Thyssen Industrie Rotor pour concasseur a marteaux
US4917314A (en) * 1987-03-25 1990-04-17 Thyssen Industrie Ag Rotor for a hammer mill
DE3721961C1 (de) * 1987-07-03 1988-11-17 Thyssen Industrie Kappe fuer die allseitige UEberdeckung der Enden der Tragkoerper eines Hammerbrecherrotors
FR2617413A1 (fr) * 1987-07-03 1989-01-06 Thyssen Industrie Coiffe pour recouvrir de tous cotes les corps porteurs d'un rotor de concasseur a marteaux
FR2619517A1 (fr) * 1987-08-21 1989-02-24 Thyssen Industrie Fixation de coiffe aux extremites des corps porteurs de marteaux d'un rotor de concasseur
DE3727870C1 (de) * 1987-08-21 1989-03-30 Thyssen Industrie Befestigung der Kappe fuer die allseitige UEberdeckung der Tragkoerperenden eines Hammerbrecherrotors
US4898334A (en) * 1987-08-21 1990-02-06 Thyssen Industrie Ag Henschel Arrangement for securing a cap to the end of a supporting body of a hammer mill rotor
US4915310A (en) * 1988-11-02 1990-04-10 Sivyer Steel Corporation Replaceable end cap assembly for the spider arm of a hammermill
US5169077A (en) * 1988-11-02 1992-12-08 Sivyer Steel Corporation Replaceable end member for a hammermill spider
US4973005A (en) * 1988-11-10 1990-11-27 Usines Et Acieries De Sambre Et Meuse Hammer-crusher rotor
DE3938725A1 (de) * 1989-11-23 1991-05-29 Lindemann Maschfab Gmbh Rotor fuer eine zerkleinerungsmaschine und schutzkappen fuer den rotor
US5072888A (en) * 1989-12-20 1991-12-17 Sivyer Steel Corporation Symmetrical protective cap for a rotary hammer assembly for a hammermill
US5141167A (en) * 1991-05-28 1992-08-25 Slvyer Steel Corporation Heavy duty disc-spider assembly for a hammermill
US5598981A (en) * 1993-09-09 1997-02-04 Sivyer Steel Corporation Hammermill
USD426556S (en) * 1997-12-08 2000-06-13 Sivyer Steel Corporation Metal shredder hammer
US6763566B1 (en) * 1999-06-17 2004-07-20 Metso Lindemann Gmbh Method and device for demounting/remounting hammers, hammer axles and/or protective caps of rotors of hammer crushers
WO2003018202A1 (en) * 2001-08-31 2003-03-06 Timberline Environmental Services Rotating cutter head and cutter head assembly
US6848244B2 (en) 2001-08-31 2005-02-01 Terry Northcutt Rotating cutter head
US20060226269A1 (en) * 2005-04-12 2006-10-12 Riverside Engineering, Inc. Offset disc hammer assembly for a hammermill
US10471435B2 (en) 2012-05-18 2019-11-12 Esco Group Llc Hammer for shredding machines
USD731564S1 (en) * 2013-05-17 2015-06-09 Esco Corporatio Hammer for shredding machines
CN103831148A (zh) * 2014-02-24 2014-06-04 常熟中材装备重型机械有限公司 转子机构改进的可逆式无篦子锤式破碎机
CN103831149A (zh) * 2014-02-24 2014-06-04 常熟中材装备重型机械有限公司 锤式破碎机的转子结构
CN103831147A (zh) * 2014-02-24 2014-06-04 常熟中材装备重型机械有限公司 可逆式无篦子锤式破碎机
CN105498908A (zh) * 2015-12-31 2016-04-20 四川先为机械有限公司 锤式破碎机的自保护转子
US20220190694A1 (en) * 2020-12-14 2022-06-16 Jason Sinkhorn Method of repairing a hydrogenerator
US11870310B2 (en) * 2020-12-14 2024-01-09 Electromechanical Engineering Associates, Inc. Method of repairing a hydrogenerator
US12316177B2 (en) 2020-12-14 2025-05-27 Electromechanical Engineering Associates, Inc. Method of repairing a hydrogenerator

Also Published As

Publication number Publication date
SE389813B (sv) 1976-11-22
IT975217B (it) 1974-07-20
DE2255380A1 (de) 1973-06-14
FR2164146A5 (es) 1973-07-27
DE2255380B2 (de) 1977-05-26
GB1409106A (en) 1975-10-08
ES407372A1 (es) 1975-10-16
CA963870A (en) 1975-03-04

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