US3465975A - Jaw crusher - Google Patents

Jaw crusher Download PDF

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Publication number
US3465975A
US3465975A US672605A US3465975DA US3465975A US 3465975 A US3465975 A US 3465975A US 672605 A US672605 A US 672605A US 3465975D A US3465975D A US 3465975DA US 3465975 A US3465975 A US 3465975A
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Prior art keywords
jaw
framework
movable jaw
fixed
drive shaft
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US672605A
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Bela Vitez
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Allis Chalmers Corp
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Allis Chalmers Corp
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Assigned to WOODS KATHLEEN D., AS TRUSTEE, CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE reassignment WOODS KATHLEEN D., AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIS-CHALMERS CORPORATION A DE CORP.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C1/00—Crushing or disintegrating by reciprocating members
    • B02C1/02—Jaw crushers or pulverisers
    • B02C1/04—Jaw crushers or pulverisers with single-acting jaws
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member

Definitions

  • a flexible link bar is fixed on'oue end to the movable jaw near the lower end thereof and the other end of the flexible link bar is fixed to the framework adjacent the top and fixed jaw side of the crushing chamber.
  • the crushing motion of the movable jaw is established by the rotating eccentric connected to the top of the movable jaw and the swing J of the flexible link bar connected to the bottom of the movable jaw.
  • This invention relates to jaw crushers and in particular to a toggleless jaw crusher having a movable jaw having one portion connected to an eccentric portion of a drive shaft and another portion flexibly connected to the framework to guide motion of the lower portion of the moving jaw to be as nearly linear as possible, rather than orbital, for etficient crushing.
  • Another object of the present invention is to provide a new and improved jaw crusher having an eccentric drive shaft connected to an upper portion of a movable jaw and a flexible link rigidly fixed on one end to a lower portion of the movable jaw and rigidly fixed on the other end to an upper portion of framework to guide the motion of the lower portion of the movable jaw without relative movement at the link ends, which if pres-- ent requires lubrication or replaceable wear absorbing pads.
  • a crusher is provided with a framework and a pair of jaws within the framework defining a crushing chamber with an inlet opening on top and a discharge opening at the bottom.
  • One of the jaws is fixed to the framework and the other is hung from a horizontally disposed drive shaft.
  • the drive shaft has end portions journaled in the framework and a midportion, eccentric to the end portions, journaled in an upper portion of the movable jaw.
  • a pair of flexible link bars are provided, with one external to each of the framework sides into which the drive shaft is journaled. The bars are each a leaf spring disposed to flex in planes perpendicular to the drive shaft.
  • each bar is fixed to a crossbar that projects through aligned openings in the framework and is fixed to a lower portion of the movable jaw.
  • the other end of each link bar is fixed to the framework at a location spaced away from the drive shaft in a direction toward the fixed jaw. This location for these ends of the link bar is also at an elevation that is higher than the other ends of the link bars which are fixed to the crossbar and lower portion of the movable jaw.
  • the link bars flex in planes perpendicular to the drive shaft and swing the lower end of the movable jaw in a path such that the lower portion of the movable jaw moves in a substantially linear path which on the crushing stroke (i.e., movement toward the fixed jaw) has a slight downward incline that promotes materal flow downwardly through the crushing chamber.
  • FIG. 1 is a side elevation view of a jaw crusher according to the present invention.
  • a crusher is shown provided with a framework 3 comprising at least a pair of spaced apart frame side walls 4, 5 and a trans verse frame member 6.
  • a stationary jaw 10 is attached in fixed position to the transverse frame member 6.
  • a movable jaw 11 is hung from a horizontally disposed drive shaft 12.
  • the drive shaft 12 has end portions 13 journaled in the frame side walls 4, 5 and a midportion 14 eccentric to end portions 13.
  • the midportion 14 of drive shaft 12 is journaled in an upper portion 15 of the movable jaw 11.
  • the drive shaft 12 is rotatably driven by means not shown.
  • a flywheel 16 is mounted on shaft 12.
  • Wear plates 17, 18 may be mounted on jaws 10, 11 in a manner according to US. Patent 3,153,512.
  • the jaws 10, 11 and wear plates 17, 18 along with side walls 4, 5 define a crushing chamber 20 having an inlet opening 21 on top and a discharge opening 22 at the bottom.
  • a pair of flexible link bars 25, 26 are provided, both external to the framework 3.
  • Link bar 25 is externally spaced from side wall 4 and link bar 26 is externally spaced from side wall 5.
  • Each link bar 25, 26 is a leaf spring comprising a plurality of flat elongated thin strips 27 having flat surfaces 28 and edges 29.
  • the link bars 25, 26 are disposed with their flat surfaces 28 in parallel, i.e., nonintersecting, alignment with respect to the drive shaft 12. This results in the flexing motion of bars 25, 26 being in planes perpendicular to drive shaft 12.
  • each of the flexible link bars 25, 26 is shown as being fixed to a crossbar 30.
  • the crossbar 30 is made in two parts, an upper and lower part 31, 32 as shown in FIG. 1.
  • the lower ends of the bars 25, 26 are sandwiched between the upper and lower parts 31, 32 of crossbar 30 and fastened together by a plurality of bolts 33.
  • the crossbar 30 projects through aligned openings 34 in side walls 4, 5.
  • the bar 30 is fixed to a bracket 35 (FIG. 1) by bolts 36.
  • the bracket 35 may be cast integrally with jaw 11 or fixed thereto, as for example by welds 37, to the back of the movable jaw 11 adjacent a bottom edge 38.
  • each of the flexible link bars 25, 26 is fixed to the walls 4, 5 of framework 3 at a location which is shown to be spaced away from drive shaft 12 in a direction toward fixed jaw 10. This location for the upper ends of bars 25, 26 is also at an elevation that is higher than the ends of the bars attached to crossbar a adjacent edge 38 of movable jaw 11.
  • the upper ends of the bars 25, 26 are sandwiched between mounting blocks 40, 41 and fastened together by bolts 42.
  • the blocks 40, 41 are fixed to side wall 4 by welds 43.
  • a crusher comprising a framework, a pair of jaws defining a crushing chamber within said framework, one of said jaws being fixed to said framework and the other jaw being connected to a rotatable drive shaft having a first shaft portion journaled in said framework and a second shaft portion eccentric to the first shaft portion and journaled in a first portion of the movable jaw, and a flexible link bar fixed on a first end to a second portion of the movable jaw spaced from the first portion of the movable jaw, and a second end of the flexible link bar fixed to a portion of the framework spaced from the first shaft portion journaled in the framework.
  • said flexible link bar being a leaf spring disposed to flex in a plane perpendicular to a central axis through the drive shaft.
  • a pair of said flexible link bars each external to the framework and on opposite sides thereof with a crossbar projecting through aligned openings in said framework connecting said pair of link bars together and to said second portion of the movable jaw.
  • said link bars each being a leaf spring disposed to flex in a plane perpendicular to said crossbar.
  • a crusher comprising a framework, a pair of jaws defining a crushing chamber within said framework, one of said jaws being fixed to the framework and the other jaw being hung from a horizontally disposed rotatable drive shaft having a first portion journaled in said framework and a second portion eccentric to said first portion and journaled in an upper portion of said movable jaw, and a flexible link bar fixed on a first end to a lower portion of said movable jaw, and a second end of said flexible link bar fixed to a portion of said framework in a vertical plane horizontally spaced from the eccentric portion of said drive shaft and spaced above a horizontal plane through the first fixed end of said link bar.
  • said flexible link bar being a leaf spring disposed to flex in a plane perpendicular to a central axis through the drive shaft.
  • a pair of said flexible link bars each external to the framework and on opposite sides thereof with a crossbar projecting through aligned openings in said framework connecting said pair of link bars together and to said lower portion of the movable jaw.
  • said link bars each being a leaf spring disposed to flex in a plane perpendicular to said crossbar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Description

Sept. 9, 1969 B. VITEZ 3,465,975
JAW CRUSHER Filed Oct. 5, 1967 amp/2W2 @5 72/001 2 A A) @M /w United States Patent 3,465,975 JAW CRUSHER Bela Vitez, Franklin, Wis., assiguor to Allis-Chalmers Manufacturing Company, Milwaukee, Wis. Filed Oct. 3, 1967, Ser. No. 672,605 Int. Cl. B02c 19/00, 13/06 US. Cl. 241-201 8 Claims ABSTRACT OF THE DISCLOSURE A toggleless jaw crusher is disclosed having a pair of jaws with one jaw fixed to crusher framework and the other jaw movable relative thereto. The movable jaw hangs from an eccentric portion of a rotating drive shaft journaled in a top portion of the movable jaw. A flexible link bar is fixed on'oue end to the movable jaw near the lower end thereof and the other end of the flexible link bar is fixed to the framework adjacent the top and fixed jaw side of the crushing chamber. The crushing motion of the movable jaw is established by the rotating eccentric connected to the top of the movable jaw and the swing J of the flexible link bar connected to the bottom of the movable jaw.
BACKGROUND OF THE INVENTION- Field of the invention This invention relates to jaw crushers and in particular to a toggleless jaw crusher having a movable jaw having one portion connected to an eccentric portion of a drive shaft and another portion flexibly connected to the framework to guide motion of the lower portion of the moving jaw to be as nearly linear as possible, rather than orbital, for etficient crushing.
Description of the prior art Jaw crushers having a flexible connection, in the form of a coil spring, between the moving jaw and framework are illustrated in United States Patents 2,921,750; 2,984,-
424; 2,996,261; 2,999,651; 3,001,729 and 3,145,938. Two
of the aforementioned patents, namely US. 2,999,651 and US. 3,145,938, additionally disclose crushers in which a movable jaw is without toggles but is provided'with rigid link bars flexibly connected on one endto a movable jaw and on the other end .to frameworklt isto this latter type of crusher that the present invention is directed. The flexible end connections to the rigid l'inkbarsare locations of wear requiring lubrication or wear absorbing replaceable pads. Further, the coil springs like any spring absorb energy for later return to the mechanism, but they have no definite length and thereforedo not themselves serye to guide the swing of the movable jaw to provide a motion of the lowerportion of the movable jaw in th desired substantially linear path.
SUM MARY OF THE INVENTION It is a primary object of the present invention to provide a new and improved jaw crusher having a motion of the lower portion of the moving jawras nearly linear and as nearly perpendicular to the stationary jaw plate asmp "ice Another object of the present invention is to provide a new and improved jaw crusher having an eccentric drive shaft connected to an upper portion of a movable jaw and a flexible link rigidly fixed on one end to a lower portion of the movable jaw and rigidly fixed on the other end to an upper portion of framework to guide the motion of the lower portion of the movable jaw without relative movement at the link ends, which if pres-- ent requires lubrication or replaceable wear absorbing pads.
According to a preferred embodiment of the present invention, a crusher is provided with a framework and a pair of jaws within the framework defining a crushing chamber with an inlet opening on top and a discharge opening at the bottom. One of the jaws is fixed to the framework and the other is hung from a horizontally disposed drive shaft. The drive shaft has end portions journaled in the framework and a midportion, eccentric to the end portions, journaled in an upper portion of the movable jaw. A pair of flexible link bars are provided, with one external to each of the framework sides into which the drive shaft is journaled. The bars are each a leaf spring disposed to flex in planes perpendicular to the drive shaft. A first end of each bar is fixed to a crossbar that projects through aligned openings in the framework and is fixed to a lower portion of the movable jaw. The other end of each link bar is fixed to the framework at a location spaced away from the drive shaft in a direction toward the fixed jaw. This location for these ends of the link bar is also at an elevation that is higher than the other ends of the link bars which are fixed to the crossbar and lower portion of the movable jaw. As the drive shaft turns the eccentric portion thereof within a journal portion of the movable jaw near the top of the jaw, the link bars flex in planes perpendicular to the drive shaft and swing the lower end of the movable jaw in a path such that the lower portion of the movable jaw moves in a substantially linear path which on the crushing stroke (i.e., movement toward the fixed jaw) has a slight downward incline that promotes materal flow downwardly through the crushing chamber.
Other features and objects of the invention that have been attained will appear from the more detailed description of an embodiment of the invention shown in the accompanying drawing.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a side elevation view of a jaw crusher according to the present invention; and
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 and 2 of the drawing, a crusher is shown provided with a framework 3 comprising at least a pair of spaced apart frame side walls 4, 5 and a trans verse frame member 6. A stationary jaw 10 is attached in fixed position to the transverse frame member 6. A movable jaw 11 is hung from a horizontally disposed drive shaft 12. The drive shaft 12 has end portions 13 journaled in the frame side walls 4, 5 and a midportion 14 eccentric to end portions 13. The midportion 14 of drive shaft 12 is journaled in an upper portion 15 of the movable jaw 11. The drive shaft 12 is rotatably driven by means not shown. A flywheel 16 is mounted on shaft 12. Wear plates 17, 18 may be mounted on jaws 10, 11 in a manner according to US. Patent 3,153,512. The jaws 10, 11 and wear plates 17, 18 along with side walls 4, 5 define a crushing chamber 20 having an inlet opening 21 on top and a discharge opening 22 at the bottom.
A pair of flexible link bars 25, 26 are provided, both external to the framework 3. Link bar 25 is externally spaced from side wall 4 and link bar 26 is externally spaced from side wall 5. Each link bar 25, 26 is a leaf spring comprising a plurality of flat elongated thin strips 27 having flat surfaces 28 and edges 29. The link bars 25, 26 are disposed with their flat surfaces 28 in parallel, i.e., nonintersecting, alignment with respect to the drive shaft 12. This results in the flexing motion of bars 25, 26 being in planes perpendicular to drive shaft 12.
The lower end of each of the flexible link bars 25, 26 is shown as being fixed to a crossbar 30. The crossbar 30 is made in two parts, an upper and lower part 31, 32 as shown in FIG. 1. The lower ends of the bars 25, 26 are sandwiched between the upper and lower parts 31, 32 of crossbar 30 and fastened together by a plurality of bolts 33. The crossbar 30 projects through aligned openings 34 in side walls 4, 5. Within side walls 4, 5 the bar 30 is fixed to a bracket 35 (FIG. 1) by bolts 36. The bracket 35 may be cast integrally with jaw 11 or fixed thereto, as for example by welds 37, to the back of the movable jaw 11 adjacent a bottom edge 38.
The upper end of each of the flexible link bars 25, 26 is fixed to the walls 4, 5 of framework 3 at a location which is shown to be spaced away from drive shaft 12 in a direction toward fixed jaw 10. This location for the upper ends of bars 25, 26 is also at an elevation that is higher than the ends of the bars attached to crossbar a adjacent edge 38 of movable jaw 11. The upper ends of the bars 25, 26 are sandwiched between mounting blocks 40, 41 and fastened together by bolts 42. The blocks 40, 41 are fixed to side wall 4 by welds 43.
In the operation of the described apparatus material such as mineral rock is fed into the inlet opening 21 of crushing chamber 20. Shaft 12 is rotated by means, not shown, to turn the eccentric portion 14 journaled in the u per portion 15 of movable jaw 11. The action of eccentric portion 14, combined with the action of the flexible but finite length bars 25, 26, flexing in planes perpendicular to the drive shaft, results in various portions .of the crushing face of wear plate 18 moving toward and away from jaw 10 and wear plate 17, in the orbital paths indicated at A, B, C and D. As jaw 11 moves, crossbar 30 moves in opening 34 and the leaf spring strips 27 of bars 25, 26 are flexed to both guide the swinging motion of jaw 11 in the desired path and to absorb energy and return it to the machine, all with but relative movement at the ends of bars 25, 26 such as would, if present, require lubrication or replaceable wear absorbing pads. All of the paths A, B, C and D are inclined downwardly in a direction that promotes a steady flow of material through chamber 20 and out discharge opening 22. At the progressively lower positions indicated at A, B, C and D the orbital paths become flatter and near the bottom of chamber 20 become, as at D, substantially linear and nearly perpendicular to wear plate 17 on fixed jaw 10. Thus the desired linear motion is provided at the desired location.
From the foregoing detailed description of the present invention, it has been shown how the objects of the invention have been attained in a preferred manner. However, modifications and equivalents of the disclosed concepts such as readily occur to those skilled in this art are intended to be included within the scope of this invention.
, ,The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A crusher comprising a framework, a pair of jaws defining a crushing chamber within said framework, one of said jaws being fixed to said framework and the other jaw being connected to a rotatable drive shaft having a first shaft portion journaled in said framework and a second shaft portion eccentric to the first shaft portion and journaled in a first portion of the movable jaw, and a flexible link bar fixed on a first end to a second portion of the movable jaw spaced from the first portion of the movable jaw, and a second end of the flexible link bar fixed to a portion of the framework spaced from the first shaft portion journaled in the framework.
2. In a Crusher according to claim 1, said flexible link bar being a leaf spring disposed to flex in a plane perpendicular to a central axis through the drive shaft.
3. In a crusher according to claim 1, a pair of said flexible link bars each external to the framework and on opposite sides thereof with a crossbar projecting through aligned openings in said framework connecting said pair of link bars together and to said second portion of the movable jaw.
4. In a crusher according to claim 3, said link bars each being a leaf spring disposed to flex in a plane perpendicular to said crossbar.
5. A crusher comprising a framework, a pair of jaws defining a crushing chamber within said framework, one of said jaws being fixed to the framework and the other jaw being hung from a horizontally disposed rotatable drive shaft having a first portion journaled in said framework and a second portion eccentric to said first portion and journaled in an upper portion of said movable jaw, and a flexible link bar fixed on a first end to a lower portion of said movable jaw, and a second end of said flexible link bar fixed to a portion of said framework in a vertical plane horizontally spaced from the eccentric portion of said drive shaft and spaced above a horizontal plane through the first fixed end of said link bar.
6. In a crusher according to claim 5, said flexible link bar being a leaf spring disposed to flex in a plane perpendicular to a central axis through the drive shaft.
7. In a crusher according to claim 5, a pair of said flexible link bars each external to the framework and on opposite sides thereof with a crossbar projecting through aligned openings in said framework connecting said pair of link bars together and to said lower portion of the movable jaw.
8. In a crusher according to claim 7, said link bars each being a leaf spring disposed to flex in a plane perpendicular to said crossbar.
References Cited UNITED STATES PATENTS 645,586 3/1900 Bunnell 241-219 853,656 5/1907 Sturtevant et al. 241219 2,183,698 12/ 1939 Schieferstein 241219 X 3,145,938 8/1964 Pollitz 241-219 X FRANK T. YOST, Primary Examiner US. Cl. X.R. 241,2l9
US672605A 1967-10-03 1967-10-03 Jaw crusher Expired - Lifetime US3465975A (en)

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DE (1) DE1800980A1 (en)
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GB (1) GB1207587A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US645586A (en) * 1897-06-21 1900-03-20 Frederick C Austin Crushing-machine.
US853656A (en) * 1905-06-13 1907-05-14 Sturtevant Mill Co Crushing-machine.
US2183698A (en) * 1936-02-14 1939-12-19 Schieferstein Georg Heinrich Stone crusher
US3145938A (en) * 1963-04-03 1964-08-25 Iowa Mfg Company Dual jaw crusher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US645586A (en) * 1897-06-21 1900-03-20 Frederick C Austin Crushing-machine.
US853656A (en) * 1905-06-13 1907-05-14 Sturtevant Mill Co Crushing-machine.
US2183698A (en) * 1936-02-14 1939-12-19 Schieferstein Georg Heinrich Stone crusher
US3145938A (en) * 1963-04-03 1964-08-25 Iowa Mfg Company Dual jaw crusher

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BR6802841D0 (en) 1973-04-26
DE1800980A1 (en) 1969-04-30
FR1581982A (en) 1969-09-19
GB1207587A (en) 1970-10-07

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