US3866843A - Overhung disk chipper - Google Patents

Overhung disk chipper Download PDF

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Publication number
US3866843A
US3866843A US391628A US39162873A US3866843A US 3866843 A US3866843 A US 3866843A US 391628 A US391628 A US 391628A US 39162873 A US39162873 A US 39162873A US 3866843 A US3866843 A US 3866843A
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United States
Prior art keywords
housing
disk
shaft
chipping
chipping disk
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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
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US391628A
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English (en)
Inventor
Edward O Lunn
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Nicholson Manufacturing Co
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Nicholson Manufacturing Co
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/02—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood shavings or the like

Definitions

  • the disk-supporting end of the shaft extends through one side of a chipreceiving housing enclosing the chipping disk from which chips are discharged through a bottom dis charge opening or are blown out of the upper portion of the housing by a centrifugal blower, the impeller of which is mounted on the chipping disk.
  • An infeed spout is connected to the upright side of the housing through which the chipping disk extends, either above the shaft, alongside the downwardly turning side of the shaft or below the shaft, at an outer angle of 37% relative to the plane of the chipping disk.
  • a portion of the housing side opposite the infeed spout may be inclined downward away from the chipping disk to reduce impact of chips against the housing wall.
  • the air inlet for a chip discharge blower may be located in registration with the infeed spout connection, so that the inflowing air current blowing onto the chips will deter their impact against the housing.
  • the chipper of the present invention is of the disk type, sometimes referred to as a front end drive chipper, and is intended for chipping wastewood, including mill ends, and also logs.
  • a principal object is to provide a chipper which is of compact construction and which will minimize impact of chips produced against a stationary wall, which impact tends to break up the chips.
  • Another object is to provide a chipper construction which is versatile by enabling the feed spout to be placed at different locations relative to the chipping disk.
  • An additional object is to provide a chipper including a blower for conveying chips cut, which blower is arranged to reduce the breakage of such chips.
  • a further object is to reduce dynamically the velocity of chips discharged from a chipping disk, so as to reduce breakage of chips striking structure of the chipper.
  • FIG. 1 is a plan of a chipper according to the present invention, with parts broken away.
  • FIG. 2 is an end elevation of the chipper.
  • FIG. 3 is a side elevation of the chipper.
  • FIG. 4 is an enlarged fragmentary side elevation of a portion of the chipper of FIGS. 1, 2 and 3, having parts broken away, and
  • FIG. 5 is a detail elevation of the feed spout of the chipper.
  • FIG. 6 is an end elevation and FIG. 7 is a side elevation of an alternative type of chipper according to the present invention, parts being broken away. 7
  • FIG. 8 is a plan of a chipper similar to that shown in FIGS. 6 and 7, but somewhat modified, having parts broken away.
  • FIG. 9 is an end elevation of a component of the chipper shown in FIG. 8 with parts broken away
  • FIG. 10 is a side elevation of such chipper component, having parts broken away.
  • FIG. 11 is an end elevation of a chipper component similar to FIG. 9, but of somewhat different construction, with parts broken away, and
  • FIG. 12 is a section taken on line l2l2 of FIG. 11.
  • FIG. 13 is an end elevation of a chipper component similar to that shown in FIG. 9 and that shown in FIG. 11, but having still different structural features, parts being broken away, and
  • FIG. 14 is a section through such component taken on line l4l4 of FIG. 13.
  • FIG. 15 is a plan of another form of chipper according to the present invention with parts broken away.
  • FIG. 16 is an end elevation and FIG. 17 is a side elevation of such chipper, having parts broken away.
  • FIG. 18 is a detail elevation of a portion of such chipper taken on line 18-18 of FIG. 15.
  • FIG. 19 is an enlarged detail vertical section through a portion of the chipper shown in FIGS. l5, l6 and 17, with parts broken away.
  • FIG. 20 is a detail elevation of a component of the chipper having parts broken away.
  • An advantageous feature of the chipper of the present invention is its compactness to which the small base 1 makes an important contribution.
  • Such base supports the working parts of the chipper from which chips are discharged into a housing having an upright side 2 adjacent to the chipper.
  • the opposite side 3 of the housing has a lower portion which preferably is inclined downwardly away from the upright side 2, as shown in FIGS. 3 and 4.
  • the upper portion of such housing can be substantially semicylindrical having parallel upright sides.
  • Chunks, or even logs, of wastewood to be chipped can be fed lengthwise through the feed spout 4 toward the chipping disk 5 located in the casing 2, 3.
  • Such chipping disk has radial slots 6 through it for passage of chips cut from the wood by radially extending knives 7 carried by the disk.
  • the chipping disk 5 is of the overhung type, being mounted on the cantilever end of stub shaft 8 which projects through the upright wall 2 of the housing.
  • the feed spout 4 is connected to this same housing wall at a location below the shaft 8, so that the chipper may be termed an underfeed type.
  • the central portion of the stub shaft 8 is mounted on the base 1 by a long bearing assembly 9, so that the opposite ends of such shaft are supported in cantilever fashion. As stated, one end of such shaft projects through the housing wall 2 into the chip-receiving housing, and the chipping disk 5 is mounted on it.
  • a drive pulley 10 for rotating the stub shaft is mounted in overhung fashion on its other cantilever end.
  • Drive belts 11 of the V-belt type connect the shaft pulley 10 and a motor pulley 12 driven by motor 13 to rotate the chipping disk 5. Because of the compact arrangement of the chipping disk 5 and shaft 8, the drive motor 13 and the feed spout 4, the base 1 supporting these components can be quite small and comparatively light and inexpensive.
  • the chipping disk 5 rotates in clockwise direction, as viewed from the disk-mounting end of the shaft.
  • the axis of the feed chute 4 is inclined at an acute angle of 37 relative to the plane of the chipping disk, as shown in FIG. 1, so that the knives 7 will cut from a side of a piece of wood fed lengthwise into the chute toward the leading end of the piece.
  • Chips cut by the chipping disk knives 7 are impelled through the slots 6 of the disk with considerable momentum by the cutting action, as indicated by the arrows in FIG. 4. It is highly desirable to minimize breakage and splintering which could result from impact of the chips discharged through slots 6 against a stationary wall or other structure, such as a shaft or shaft housing, close to such slots.
  • the feed spout is of the underfeed type, as shown in FIGS. 1 to 5, inclusive, and such spout is connected to the same wall 2 of the chipreceiving housing as that through which the cantilever end of the stub shaft 8 extends, it is feasible to locate the wall 3 of the housing opposite wall 2 at a considerable distance from the chipping disk slots 6 through which the chips pass.
  • FIGS. 3 and '4 show the lower portion of the housing side 3 as being inclined downward away from the housing side 2 from approximately the elevation of the shaft 8.
  • the bottom of the housing is completely open to provide a bottom chip discharge chute 14. Since the trajectory of the chips discharged through the lower disk slots 6 is downward, the lower portion of the wall 3 slopes downward away from the chipping disk, and
  • Such wall is located a considerable distance from the chipping disk, any chips which strike the lower portion of wall 3 will approach the wall at a small angle of incidence, so as to reduce the force of impact of such chips with the wall and thereby minimize shattering of the chips.
  • Such wall contour and location is made possible by utilizing a chipping disk of the overhung type carried by a stub shaft mounted at the same side of the chipreceiving housing as the feed spout.
  • the chips instead of being discharged by gravity, are blown by a current of air to a storage bin or location for utilization.
  • the overhung chipping disk and drive pulley 10 again are carried by theopposite cantilever ends of a stub shaft 8 mounted on the base 1 by a long bearing assembly 9.
  • the principal difference of this chipper over that shown in FIGS. 1 to 5 is in the chip-receiving casing and blower mechanism.
  • a well is provided alongside the support for the chipper base 1 for receiving the lower portion 16 of a centrifugal blower scroll housing, which is of generally semicylindrical shape.
  • the upper portion 17 of such housing also of generally semicylindrical shape, is mounted on the lower housing section 16.
  • the entire blower housing 16, 17 is supported with its opposite planar sides upright.
  • the stub shaft 8 is substantially horizontal, and its cantilever end carrying the chipping disk 5 projects through one of the upright sides of the chip-receiving housing.
  • the feed spout 18 is shown as being inclined at an acute angle of 37% relative to the plane of the chipping disk downwardly toward the upright wall of the chip-receiving housing to which it is connected. Consequently, such a chipper may be designated as a drop-feed chipper.
  • the feed spout enters the same side of the housing as shaft 8 but at a location offset from the shaft and at approximately the same elevation.
  • Chips cut by the knives of chipping disk 5 are impelled through the slots 6 of such disk into the lower portion 16 of the chip-receiving housing.
  • the chips are blown from such housing by the current of air produced by a centrifugal blower impeller rotated in the housing.
  • Such impeller includes annular sideplates 19 secured to the opposite ends of the blower vanes 20.
  • One of the sideplates 19 is secured to the periphery of the chipping disk 5 at circumferentially spaced locations by mounting angles 21, so that the blower impeller is carried and rotated by the chipping disk 5.
  • blower vanes 20 The outer portion of the edges of blower vanes 20 are supported by gussets 22 projecting radially outwardly from the sideplates 19 and secured to the blade, ends. It will be seen from FIGS. 6 and 7 that the annular sideplates 19 0f the blower impeller are radially quite narrow, and their inner diameters are the same and approximately equal to the diameter of the chipping disk 5.
  • the leading sides of the blower vanes 20 preferably are concave to increase the effectiveness of the impeller in producing an air current.
  • Air is admitted to the blower casing 16, 17 through the air inlet opening 23 in the central portion of that wall of the blower housing opposite that through which the cantilever end of shaft 8 projects. Air and chips are discharged tangentially of the housing through the outlet 24. A discharge duct 25 leading to a storage bin or chip utilization location is connected to the housing outlet. Chips discharged into the housing through the slots 6 are picked up by the air current produced by the blower impeller and carried around the housing to the outlets 24 through which they are discharged into the duct 25.
  • FIGS. 8, 9 and 10 show an alternative type of impeller construction in which the radially narrow annular sideplates 19 of the rotor shown in FIGS. 6 and 7 are replaced by sideplates 26 of a radial width equal to the full radial extent of the blower vanes 20.
  • Use of side plates of such width eliminates the need for the supporting gussets 22.
  • Chips cut by the blades 7 of the chipping disk 5 may be impelled through the slots 6 of the disk with sufficient momentum that they will strike the wall of the lower casing section 16 opposite that through which shaft 8 projects with a force great enough to fracture the chips to a greater or lesser extent.
  • Such tendency for chip damage can be reduced by modifying the construction of the impeller shown in FIGS. 6 and 7, or in FIGS. 8, 9 and 10, to the construction of FIGS. 11 and 12.
  • the edges of the vanes 20 adjacent to the wall of the housing through which shaft 8 projects are secured to an annular sideplate 26 of the type described in connection with FIGS. 8, 9 and 10.
  • the edges of blades 20 remote from the casing wall through which the shaft 8 projects are secured to an annular impeller side plate 27, which is of a radial width extending from the housing air inlet housing aperture 23 to the radially outer edges of vanes 20.
  • the inner periphery of the sideplate 27 therefore provides an opening 28 through which air can pass from the inlet 23 to the interior of the impeller, which opening is approximately the same size as the size of the air inlet.
  • the rotary side plate 27 overlies and masks the side of the blower housing opposite that through which shaft 8 projects so as to protect the chips from striking the stationary wall of the housing.
  • any chips which are carried axially across the blower impeller will strike only the rotating plate 27, which will decrease greatly the force with which the chips strike the plate and reduce chip breakage.
  • the chips Since the cutting of the chips occurs substantially at the location of the connection of feed spout 18 to the housing wall, the chips will be impelled through the slots 6 substantially in registration with such feed spout connection.
  • the momentum of air entering the inlet opening 29 will prevent emergence of any appreciable quantity of chips from such air inlet opening, and the air current will oppose and quell the momentum of the chips passing through the slots 6. Consequently, the chips will be entrained almost immediately by the inflowing air and diverted into an orbital path through the blower, so as to eliminate virtually all risk of the chips striking any surface of the blower with a force sufficiently great to fracture the chips.
  • the feed spout 30 is located at an elevation higher than the shaft 8, so that such chipper may be designated as an overfeed or spout-over-shaft type.
  • the length of the feed spout is substantially parallel to a horizontal plane but again, as in the device of FIGS. 1 to 3, is arranged with its axis at an angle to the wall of the chip-receiving housing to which the spout connects at an acute angle of 37% relative to the portion of the chipping disk 5 moving toward the feed spout, i.e., the upwardly moving portion of the chipping disk.
  • the chips are discharged from the housing through a gravity discharge chute 14.
  • the lower portion 32 of the side of the housing opposite that through which shaft 8 projects can be upright as shown in FIGS. 17 and 19, because, by the time the chip has fallen through the upper portion of the housing, its trajectory will be principally downward, so that, again, if a chip strikes the housing wall, it will be with a glancing impact which will not have a great tendency to fracture the chip.
  • the prospect of chips striking the wall of the housing opposite the chipping disk can be further reduced by increasing the width of the housing conveniently, because of the overhung type of construction of the chipping disk and the arrangement in which the feed spout connects to the same side of the housing through which the shaft 8 supporting the chip- 1.
  • An overhung disk chipper comprising a base, a generally horizontal drive shaft carried rotatively by said base and having a cantilever end portion, an overhung chipping disk carried rotatively by said cantilever end portion of said drive shaft for upward movement of the portion of said chipping disk at one side of said shaft and downward movement of the portion of said chipping disk at the other side of said shaft and said chipping disk carrying chip-cutting bits on the side thereof to which said shaft is connected for cutting wood into chips, a housing for said chipping disk having an upright wall at the same side of said chipping disk as said shaft, and an elongated feed spout at the same side of said chipping disk as said shaft and housing upright wall, having an end connected to said housing upright wall only at a location above said shaft and having its length disposed substantially parallel to a horizontal plane and at an acute angle relative to the upwardlymoving portion of said chipping disk for guiding pieces of wood to be cut into chips to move lengthwise of such wood pieces and lengthwise of said feed spout through said housing upright
  • the housing includes a second wall at the side of the chipping disk opposite the upright wall, and said second wall has a portion higher than the shaft inclined downwardly away from the upright wall for deflecting downward chips passing through the upper portion of the chipping disk.
  • An overhung disk chipper comprising a base, a generally horizontal drive shaft carried rotatively by said base and having a cantilever end portion, an overhung chipping disk carried rotatively by said cantilever end portion of said drive shaft and carrying chipcutting bits on the side thereof to which said shaft is connected for cutting wood into chips, a housing for said chipping disk having an upright wall at the same side of said chipping disk as said shaft, an elongated feed spout at the same side of said chipping disk as said shaft and housing upright wall, having an end connected to said housing upright wall and having its length disposed at an acute angle relative to the portion of said chipping disk moving toward said feed spout for guiding pieces of wood to be cut into chips to move lengthwise of such wood pieces and lengthwise of said feed spout, and rotary blower means in said housing op erable to blow therefrom chips cut by said chipping disk, said housing including a second wall at the side of said chipping disk opposite said upright wall, and said second wall having an air inlet
  • blower means includes an impeller mounted in cantilever fashion on the chipping disk, and said impeller includes an annular plate at the side of said impeller opposite the chippingdisk and having a central aperture overlapping the air inlet opening.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
US391628A 1972-09-05 1973-08-27 Overhung disk chipper Expired - Lifetime US3866843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA150,963A CA967458A (en) 1972-09-05 1972-09-05 Overhung disk chipper

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US3866843A true US3866843A (en) 1975-02-18

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US391628A Expired - Lifetime US3866843A (en) 1972-09-05 1973-08-27 Overhung disk chipper

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US (1) US3866843A (ja)
JP (1) JPS4966901A (ja)
AU (1) AU5998273A (ja)
BR (1) BR7306917D0 (ja)
CA (1) CA967458A (ja)
FR (1) FR2197704B1 (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240588A (en) * 1979-03-06 1980-12-23 Fulghum Industries, Inc. Wood chipping installation
US4247053A (en) * 1978-09-22 1981-01-27 Domtar Inc. Chipper with means for separating debris from chips
US4527604A (en) * 1984-02-21 1985-07-09 Everett Colvin K Wood chipping assembly
US4592514A (en) * 1983-07-11 1986-06-03 Veb Kombinat Fortschritt-Landmaschinen Field chopper with adjustable fan assist
US4770217A (en) * 1987-11-18 1988-09-13 Strong Donald E Wood chipper with seal protector
US4796818A (en) * 1987-07-30 1989-01-10 Beloit Corporation Chip slicer improvement
US5094280A (en) * 1990-05-18 1992-03-10 Kone Oy Disk chipper for the production of wood chips
US5293917A (en) * 1991-11-11 1994-03-15 Sunds Defibrator Woodhandling Oy Disc chipper feeding method and disc chipper

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210840A1 (de) * 1982-03-24 1983-10-06 Poettinger Ohg Alois Vorrichtung zum zerkleinern von schwachholz

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123311A (en) * 1964-03-03 Wood chipper
US3332461A (en) * 1965-03-12 1967-07-25 Ledergerber Karl Chipper feed spout
US3407854A (en) * 1966-03-23 1968-10-29 Black Clawson Co Wood chipping apparatus
US3410495A (en) * 1966-07-22 1968-11-12 Beloit Corp Wood chipper
US3572594A (en) * 1969-02-18 1971-03-30 Kershaw Mfg Co Inc Wood comminuting apparatus
US3590896A (en) * 1969-04-14 1971-07-06 Moore & Stephenson Apparatus for shredding or cutting heads of lettuce, cabbage and the like
US3635410A (en) * 1970-05-04 1972-01-18 Rader Pneumatics & Eng Co Ltd Pulpwood chipper
US3661329A (en) * 1970-07-09 1972-05-09 Rader Pneumatics & Eng Co Ltd Means and method for producing wood chips
US3732907A (en) * 1970-06-12 1973-05-15 Pitea Maskin Industri Device for separating small pieces from a work piece of material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3319674A (en) * 1964-12-09 1967-05-16 Carthage Machine Company Inc Chipper

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123311A (en) * 1964-03-03 Wood chipper
US3332461A (en) * 1965-03-12 1967-07-25 Ledergerber Karl Chipper feed spout
US3407854A (en) * 1966-03-23 1968-10-29 Black Clawson Co Wood chipping apparatus
US3410495A (en) * 1966-07-22 1968-11-12 Beloit Corp Wood chipper
US3572594A (en) * 1969-02-18 1971-03-30 Kershaw Mfg Co Inc Wood comminuting apparatus
US3590896A (en) * 1969-04-14 1971-07-06 Moore & Stephenson Apparatus for shredding or cutting heads of lettuce, cabbage and the like
US3635410A (en) * 1970-05-04 1972-01-18 Rader Pneumatics & Eng Co Ltd Pulpwood chipper
US3732907A (en) * 1970-06-12 1973-05-15 Pitea Maskin Industri Device for separating small pieces from a work piece of material
US3661329A (en) * 1970-07-09 1972-05-09 Rader Pneumatics & Eng Co Ltd Means and method for producing wood chips

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4247053A (en) * 1978-09-22 1981-01-27 Domtar Inc. Chipper with means for separating debris from chips
US4240588A (en) * 1979-03-06 1980-12-23 Fulghum Industries, Inc. Wood chipping installation
US4592514A (en) * 1983-07-11 1986-06-03 Veb Kombinat Fortschritt-Landmaschinen Field chopper with adjustable fan assist
US4527604A (en) * 1984-02-21 1985-07-09 Everett Colvin K Wood chipping assembly
US4796818A (en) * 1987-07-30 1989-01-10 Beloit Corporation Chip slicer improvement
US4770217A (en) * 1987-11-18 1988-09-13 Strong Donald E Wood chipper with seal protector
US5094280A (en) * 1990-05-18 1992-03-10 Kone Oy Disk chipper for the production of wood chips
US5293917A (en) * 1991-11-11 1994-03-15 Sunds Defibrator Woodhandling Oy Disc chipper feeding method and disc chipper
AT402709B (de) * 1991-11-11 1997-08-25 Sunds Defibrator Woodhandling Scheibenspaner und verfahren zur beschickung desselben

Also Published As

Publication number Publication date
BR7306917D0 (pt) 1974-06-27
AU5998273A (en) 1975-03-06
CA967458A (en) 1975-05-13
FR2197704A1 (ja) 1974-03-29
FR2197704B1 (ja) 1976-05-14
JPS4966901A (ja) 1974-06-28

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