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EP 2 147 163 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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06.10.2010 Bulletin 2010/40 |
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Date of filing: 15.04.2008 |
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International Patent Classification (IPC):
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International application number: |
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PCT/NL2008/000103 |
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International publication number: |
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WO 2008/130222 (30.10.2008 Gazette 2008/44) |
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JAW CRUSHER FOR A MOBILE RUBBLE CRUSHING DEVICE
BACKENBRECHER FÜR EINE MOBILE GESTEINSZERTRÜMMERUNGSVORRICHTUNG
CONCASSEUR À MÂCHOIRES POUR DISPOSITIF MOBILE DE CONCASSAGE DE MOELLONS
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Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL
PT RO SE SI SK TR |
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Priority: |
18.04.2007 NL 1033709
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Date of publication of application: |
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27.01.2010 Bulletin 2010/04 |
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Proprietor: Rotar International B.V. |
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8281 JW Genemuiden (NL) |
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Inventor: |
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- DE GRAAF, Remco, Rommert
7688 PX Daarle (NL)
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Representative: Dokter, Hendrik Daniel |
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Octrooibureau Dokter
P.O. Box 657 7300 AR Apeldoorn 7300 AR Apeldoorn (NL) |
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References cited: :
EP-A- 0 798 421 WO-A-2004/026479 JP-A- 11 033 420 JP-A- 2005 206 337
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WO-A-03/062541 WO-A-2006/072323 JP-A- 11 061 876 SU-A1- 413 987
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] The invention relates to a jaw crusher for a rubble crushing device, comprising a
grab bucket provided with an inlet opening for rubble parts to be reduced in size,
an outlet opening for reduced rubble parts, at least two co-acting crushing bodies
for reducing rubble parts in size therebetween, and drive means for moving one of
the at least two crushing bodies relative to the other crushing body, which drive
means comprise one flywheel and at least one motor.
[0002] Known from European patent application publication number
EP-1138834-A2 is a jaw crusher which is intended for attachment to a movable arm of a self-propelled
vehicle. The known jaw crusher comprises two co-acting crushing bodies formed by a
fixed wall and a crushing plate oscillating thereabove which is driven by an eccentric
on a shaft, this shaft being set into rotation by a hydraulic motor. The rotation
speed of the shaft, and thereby the continuity of the oscillating movement of the
crushing plate, is held constant using two flywheels suspended from the ends of the
shaft close to the side walls of the bucket of the jaw crusher.
[0003] It is a drawback of the known jaw crusher that, due to the two flywheels, it is very
heavy. Too great a weight makes the jaw crusher unsuitable for mounting on the boom
of for instance an excavator or a wheel loader, and therefore unsuitable as jaw crusher
for a mobile rubble crushing device. Owing to the placing of the flywheels in the
vicinity of the side walls in the bucket the known jaw crusher is vulnerable in the
case of damage to a side wall, for instance as a result of excessively violent collisions
of the bucket with objects outside it, or as result of collisions of debris present
in the bucket with a side wall. There is also a chance, in the case a shaft breaks,
of a flywheel breaking through a side wall, with all the associated risks for bystanders.
The known jaw crusher is not suitable for removing iron from the reduced rubble parts.
In respect of current legal regulations, reduced rubble parts containing iron are
unsuitable for reuse, so that a separate treatment of the reduced rubble parts is
necessary in a de-ironing installation.
[0004] It is an object of the invention to provide a jaw crusher for a rubble crushing device,
in particular for a mobile rubble crushing device, which jaw crusher has a sufficiently
low weight to enable coupling thereof in simple manner to a movable arm of a self-propelled
vehicle, for instance an excavator or a wheel loader.
[0005] It is a further object to provide a jaw crusher which can sufficiently withstand
debris striking the outside or, in the interior, components of this jaw crusher.
[0006] It is another object to provide a jaw crusher which does not result in a safety hazard
to the surrounding area in the unlikely event of damage occurring to the interior.
[0007] These objects are realized, and other advantages gained, with a jaw crusher having
all the technical features, in combination, according to claim 1.
[0008] A jaw crusher according to the invention with only one flywheel provides the advantage
of a substantial weight reduction compared to the known jaw crusher with two flywheels.
Use is made here of the fact that the moment of inertia of a flywheel is determined
substantially by the mass in the vicinity of the periphery of the flywheel, and a
reduction of the mass in the vicinity of the shaft does not result in a substantial
reduction in moment of inertia.
[0009] A jaw crusher with one flywheel suspended in the centre of a shaft as according to
the invention is also safer relative to the known jaw crusher with two flywheels suspended
on the sides of the grab bucket in the unlikely event of a shaft breaking, since there
is an exceptionally small chance of the one flywheel breaking through a side wall.
[0010] In a jaw crusher according to the invention the flywheel is preferably coupled in
symmetrical manner to the at least one motor for the purpose of setting the flywheel
into rotation.
[0011] In an embodiment the flywheel is coupled to two motors engaging on the shaft on either
side of the flywheel, for instance two hydromotors arranged on the shaft.
[0012] In an advantageous embodiment the flywheel is coupled to one motor, for instance
a hydromotor, engaging on the periphery of the flywheel.
[0013] In an embodiment with one motor, the flywheel is preferably coupled to this motor
by means of at least one V-belt.
[0014] Such a jaw crusher is for instance provided with a substantially H-shaped drive rod
for coupling the shaft to the at least one movable crushing body, which drive rod
comprises two legs which at their one end are coupled eccentrically to the shaft on
either side of the flywheel and which at their other end are coupled pivotally to
the crushing body, and which are coupled rigidly to each other by a transverse part.
[0015] A preferred embodiment of a jaw crusher according to the invention is provided with
separating means for separating ferromagnetic parts from the reduced rubble parts.
[0016] The separating means comprise for instance a magnetic separator placed in the vicinity
of the outlet opening.
[0017] In an advantageous embodiment the magnetic separator comprises an endless conveyor
belt and a permanent magnet for generating a magnetic field on the side of the conveyor
belt serving under normal conditions of use as underside, wherein the conveyor belt
is for instance provided with a surface profiling which is preferably formed by ribs
extending transversely of the direction of transport of the conveyor belt.
[0018] In such a jaw crusher ferromagnetic parts, particularly residues of concrete reinforcing
bars, are attracted by the permanent magnet and pressed against the underside of the
conveyor belt until a maximum capacity is reached and the quantity of ferromagnetic
residues must be unloaded from the jaw crusher. For this purpose the jaw crusher is
for instance positioned with its outlet opening above a collecting container for iron
residues, and the endless belt is displaced through some distance using a drive motor
present for this purpose, wherein the iron parts pressed against the belt are dragged
along by the transverse ribs and out of the magnetic field generated by the magnet,
where the parts are released from the belt and drop via the outlet opening into the
collecting container.
[0019] Another embodiment of a jaw crusher according to the invention is provided with at
least one hydraulic jack for adjusting the distance between the crushing bodies which
is coupled pivotally between the grab bucket and a non-driven crushing body.
[0020] The size of the reduced rubble parts is set by adjusting said distance using such
a jack.
[0021] Such a jaw crusher is preferably provided with two hydraulic jacks which are coupled
pivotally between the grab bucket and a non-driven crushing body and which are each
coupled by a fixed liquid conduit to a shared liquid pump.
[0022] In order to prevent overload of the device and for safety reasons in the situation
in which rubble to be reduced in size is supplied which is too hard to crush, the
liquid conduit is preferably provided with a pressure relief. An additional advantage
of such a pressure relief is that use need not be made of prior art safety crushing
plates, which are designed such that they break in the case of overload, and must
therefore be replaced.
[0023] The invention will be elucidated hereinbelow on the basis of an exemplary embodiment,
with reference to the drawings.
[0024] In the drawings
Fig. 1 shows a cut-away perspective view of a first embodiment of a jaw crusher according
to the invention,
Fig. 2 shows a perspective view of a flywheel for a jaw crusher as shown in fig. 1,
Fig. 3 shows a perspective view of a drive rod for a jaw crusher as shown in fig.
1,
Fig. 4 shows a perspective view of a magnetic separator for a jaw crusher as shown
in fig. 1,
Fig. 5 shows a cut-away perspective view of a hydraulic adjusting device for the jaw
crusher shown in fig. 1, and
Fig. 6 shows a perspective view of the drive for a second embodiment of a jaw crusher
according to the invention.
[0025] Corresponding components are designated in the figures with the same reference numerals.
[0026] Fig. 1 shows a jaw crusher 1 with a grab bucket 2 which is provided with an inlet
opening 3, an outlet opening 4, a fixed crushing plate 5 which is height-adjustable
relative to the bottom of grab bucket 2 and, co-acting therewith, a driven crushing
plate 6 for reducing rubble parts in size therebetween, a flywheel 8 suspended on
a shaft 9, a hydromotor 28 for driving flywheel 8, and a drive rod 10 coupled eccentrically
to shaft 9 for the purpose of moving the driven crushing plate 6 up and downward.
On its side directed toward outlet opening 4 the upper (driven) crushing plate 6 is
coupled pivotally to the bottom of grab bucket 2, and can be moved up and downward
on its side directed toward inlet opening 3. The space between fixed crushing plate
5 and movable crushing plate 6 narrows in the direction from inlet opening 3 to outlet
opening 4. Jaw crusher 1 is provided with a coupling member 11 with which it can be
coupled to the movable boom of for instance an excavator or a wheel loader.
[0027] Fig. 2 shows the drive of jaw crusher 1 of fig. 1 in more detail, with shaft 9 which
is mounted with bearing housings 12 on the sides of grab bucket 2, flywheel 8 which
is provided on its periphery with V-grooves 13 for a multi-V-belt (not shown) with
which flywheel 8 is coupled to a hydraulic drive motor (not shown). Flywheel 8 is
mounted by means of a spline toothing (not shown) on shaft 9 which is further provided
on either side of flywheel 8 with eccentrics 14, to which the drive rod 10 for driving
the upper crushing plate 6 is coupled.
[0028] Fig. 3 shows an H-shaped drive rod 10 which comprises two legs 15, which at their
one end are coupled eccentrically to shaft 9 on either side of the flywheel and which
at their other end are coupled pivotally to upper crushing plate 6 (shown in fig.
1), and which are coupled rigidly to each other by a transverse part 16.
[0029] Fig. 4 shows a magnetic separator 17 consisting of a flat conveyor belt 18 with upright
transverse ribs 19, driven by a hydromotor 20 and provided with a fixing strip 21
with which the separator 17 can be fixed against the inner wall of grab bucket 2.
The underside of conveyor belt 18 runs in close-fitting manner along a permanent magnet
(not shown) which is enclosed by conveyor belt 18.
[0030] Fig. 5 shows the underside of grab bucket 2 with lower crushing plate 5, which is
coupled close to inlet opening 3 to a hinge 22 on the bottom of grab bucket 2 and
which is coupled pivotally to the bottom of grab bucket 2 close to outlet opening
4 by means of two hydraulic jacks 23, which are connected to a shared hydraulic hand
pump 24 by a fixed liquid conduit (not shown) which is provided with a pressure relief
(not shown). Jacks 23 are mounted pivotally on a rocker yoke 25 mounted on the bottom
of grab bucket 2 and are provided with forks 26 for the purpose of the pivotal coupling
to crushing plate 5. The absence of liquid hoses, which can expand, prevents the lower
crushing plate 5 being able to carry out a resilient displacement. Using hand pump
24 it is possible in simple manner to vary the angle of inclination of lower crushing
plate 5 relative to the bottom of grab bucket 2, and thereby the distance to the end
of upper crushing plate 6 directed toward outlet opening 4.
[0031] Fig. 6 shows an alternative embodiment of a drive for an oscillating crushing plate
6, in which shaft 9 is driven by two hydromotors 27 placed on the outer ends thereof.
1. Jaw crusher (1) for a rubble crushing device, comprising a grab bucket (2) provided
with an inlet opening (3) for rubble parts to be reduced in size, an outlet opening
(4) for reduced rubble parts, at least two co-acting crushing bodies (5, 6) for reducing
rubble parts in size therebetween, and drive means (8, 10, 27, 28) for moving one
of the at least two crushing bodies (6) relative to the other crushing body (5), which
drive means comprise one flywheel (8) and at least one motor (27, 28), characterized in that the flywheel (8) is suspended in the centre of a shaft (9) bearing-mounted on two
opposite sides of the grab bucket (2).
2. Jaw crusher (1) as claimed in claim 1, characterized in that the flywheel (8) is coupled in symmetrical manner to the at least one motor (27,
28) for the purpose of setting the flywheel (8) into rotation.
3. Jaw crusher as claimed in claim 2, characterized in that the flywheel (8) is coupled to two motors (27) engaging on the shaft (9) on either
side of the flywheel (8).
4. Jaw crusher as claimed in claim 3, characterized in that the motors are two hydromotors (27) arranged on the shaft (9).
5. Jaw crusher (1) as claimed in claim 2, characterized in that the flywheel (8) is coupled to one motor (28) engaging on the periphery of the flywheel
(8).
6. Jaw crusher (1) as claimed in claim 5, characterized in that the motor is a hydromotor (28).
7. Jaw crusher (1) as claimed in any of the claims 5-6, characterized in that the flywheel (8) is coupled to the motor (28) by means of at least one V-belt.
8. Jaw crusher (1) as claimed in any of the claims 5-7, characterized in that it is provided with a substantially H-shaped drive rod (10) for coupling the shaft
(9) to the at least one movable crushing body (6), which drive rod (10) comprises
two legs (15) which at their one end are coupled eccentrically to the shaft (9) on
either side of the flywheel (8) and which at their other end are coupled pivotally
to the crushing body (5), and which are coupled rigidly to each other by a transverse
part (16).
9. Jaw crusher (1) as claimed in any of the claims 1-8, characterized in that it is provided with separating means (17) for separating ferromagnetic parts from
the reduced rubble parts.
10. Jaw crusher (1) as claimed in claim 9, characterized in that the separating means comprise a magnetic separator (17) placed in the vicinity of
the outlet opening.
11. Jaw crusher (1) as claimed in claim 10, characterized in that the magnetic separator (17) comprises an endless conveyor belt (18) and a permanent
magnet for generating a magnetic field on the side of the conveyor belt (18) serving
under normal conditions of use as underside.
12. Jaw crusher (1) as claimed in claim 11, characterized in that the conveyor belt (18) is provided with a surface profiling (19).
13. Jaw crusher (1) as claimed in claim 12, characterized in that the surface profiling is formed by ribs (19) extending transversely of the direction
of transport of the conveyor belt (18).
14. Jaw crusher (1) as claimed in any of the claims 1-13, characterized in that it is provided with at least one hydraulic jack (23) for adjusting the distance between
the crushing bodies (5, 6) which is coupled pivotally between the grab bucket (2)
and a non-driven crushing body (5).
15. Jaw crusher (1) as claimed in claim 14, characterized in that it is provided with two hydraulic jacks (23) which are coupled pivotally between
the grab bucket (2) and a non-driven crushing body (5) and which are coupled by a
fixed liquid conduit to a shared liquid pump (24).
16. Jaw crusher (1) as claimed in claim 15, characterized in that the liquid conduit is provided with a pressure relief.
1. Backenbrecher (1) für eine Bauschuttbrecheinrichtung, umfassend einen Brecherlöffel
(2) ausgestattet mit einer Einlassöffnung (3) für zu zerkleinernde Bauschuttteile,
einer Auslassöffnung (4) für zerkleinerte Bauschuttteile, mindestens zwei zusammenarbeitenden
Brechkörpern (5, 6) für das dazwischen Zerkleinern von Bauschuttteilen und Antriebsmitteln
(8, 10, 27, 28) für das Bewegen eines der mindestens zwei Brechkörper (6) gegenüber
dem anderen Brechkörper (5), welche Antriebsmittel ein Schwungrad (8) und mindestens
einen Motor (27, 28) umfassen, dadurch gekennzeichnet, dass das Schwungrad (8) in der Mitte einer an zwei überstehenden Seiten des Brecherlöffels
(2) gelagerten Achse (9) aufgehängt ist.
2. Backenbrecher (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Schwungrad (8) auf symmetrische Weise mit dem mindestens einen Motor (27, 28)
verbunden ist für das in Rotation Versetzen des Schwungrades (8).
3. Backenbrecher nach Anspruch 2, dadurch gekennzeichnet, dass das Schwungrad (8) mit zwei beidseitig des Schwungrades (8) an der Achse (9) angreifenden
Motoren (27) verbunden ist.
4. Backenbrecher nach Anspruch 3, dadurch gekennzeichnet, dass die Motoren zwei auf der Achse (9) angebrachte Hydromotoren (27) sind.
5. Backenbrecher (1) nach Anspruch 2, dadurch gekennzeichnet, dass das Schwungrad (8) mit einem an dem Umfang des Schwungrades (8) angreifenden Motor
(28) verbunden ist.
6. Backenbrecher (1) nach Anspruch 5, dadurch gekennzeichnet, dass der Motor ein Hydromotor (28) ist.
7. Backenbrecher (1) nach einem der Ansprüche 5-6, dadurch gekennzeichnet, dass das Schwungrad (8) durch mindestens einen Keilriemen mit dem Motor (28) verbunden
ist.
8. Backenbrecher (1) nach einem der Ansprüche 5-7, dadurch gekennzeichnet, dass dieser mit einer im Wesentlichen H-förmigen Antriebsstange (10) zum Verbinden der
Achse (9) mit dem mindestens einen beweglichen Brechkörper (6) ausgestattet ist, welche
Antriebsstange (10) zwei Beine (15) umfasst, die an ihrem einen Ende beiderseitig
des Schwungrades (8) exzentrisch mit der Achse (9) verbunden sind und die an ihrem
anderen Ende scharnierbar mit dem Brecherkörper (5) verbunden sind, und die untereinander
starr durch ein Querteil (16) verbunden sind.
9. Backenbrecher (1) nach einem der Ansprüche 1-8, dadurch gekennzeichnet, dass dieser mit Separationsmitteln (17) zum Separieren ferromagnetischer Teile aus den
zerkleinerten Bauschuttteilen ausgestattet ist.
10. Backenbrecher (1) nach Anspruch 9, dadurch gekennzeichnet, dass die Separationsmittel einen in der Nähe der Auslassöffnung positionierten magnetischen
Separator (17) umfassen.
11. Backenbrecher (1) nach Anspruch 10, dadurch gekennzeichnet, dass der magnetische Separator (17) ein endloses Förderband (18) und einen Permanentmagneten
umfasst für das an der unter normalen Gebrauchsumständen als Unterseite dienenden
Seite des Förderbandes (18) Generieren eines magnetischen Feldes.
12. Backenbrecher (1) nach Anspruch 11, dadurch gekennzeichnet, dass das Förderband (18) mit einem Oberflächenprofil (19) ausgestattet ist.
13. Backenbrecher (1) nach Anspruch 12, dadurch gekennzeichnet, dass das Oberflächenprofil durch sich quer zur Förderrichtung des Förderbandes (18) erstreckende
Rippen (19) gebildet wird.
14. Backenbrecher (1) nach einem der Ansprüche 1-13, dadurch gekennzeichnet, dass dieser mit mindestens einem zwischen dem Brecherlöffel (2) und einem nicht angetriebenen
Brechkörper (5) scharnierbar verbundenen hydraulischen Heber (23) zum Einstellen des
Abstandes zwischen den Brechkörpern (5, 6) ausgestattet ist.
15. Backenbrecher (1) nach Anspruch 14, dadurch gekennzeichnet, dass dieser mit zwei zwischen dem Brecherlöffel (2) und einem nicht angetriebenen Brechkörper
(5) scharnierbar verbundenen hydraulischen Hebern (23) ausgestattet ist, die durch
eine feste Flüssigkeitsleitung mit einer gemeinsamen Flüssigkeitspumpe (24) verbunden
sind.
16. Backenbrecher (1) nach Anspruch 15, dadurch gekennzeichnet, dass die Flüssigkeitsleitung mit einer Überdrucksicherung ausgestattet ist.
1. Concasseur à mâchoires (1) pour un dispositif de concassage de moellons, comprenant
une benne preneuse (2) comportant une ouverture d'entrée (3) pour des parties de moellon
dont il faut réduire la taille, une ouverture de sortie (4) pour des parties de moellon
réduites, au moins deux corps de concassage coopérants (5, 6) pour réduire la taille
de parties de moellons entre ceux-ci, et des moyens d'entraînement (8, 10, 27, 28)
pour déplacer un desdits au moins deux corps de concassage (6) par rapport à l'autre
corps de concassage (5), lesdits moyens d'entraînement comprenant un volant (8) et
au moins un moteur (27, 28), caractérisé en ce que le volant (8) est suspendu au milieu d'un arbre (9) qui est monté sur des paliers
deux côtés opposés de la benne preneuse (2).
2. Concasseur à mâchoires (1) selon la revendication 1, caractérisé en ce que le volant (8) est couplé de manière symétrique audit au moins un moteur (27, 28)
dans le but de réaliser la rotation du volant (8).
3. Concasseur à mâchoires (1) selon la revendication 2, caractérisé en ce que le volant (8) est couplé à deux moteurs (27) qui s'engagent sur l'arbre (9) de part
et d'autre du volant (8).
4. Concasseur à mâchoires (1) selon la revendication 3, caractérisé en ce que les moteurs sont deux hydromoteurs (27) qui sont agencés sur l'arbre (9).
5. Concasseur à mâchoires (1) selon la revendication 2, caractérisé en ce que le volant (8) est couplé à un premier moteur (28) qui s'engage sur la périphérie
du volant (8).
6. Concasseur à mâchoires (1) selon la revendication 5, caractérisé en ce que le moteur est un hydromoteur (28).
7. Concasseur à mâchoires (1) selon l'une quelconque des revendications 5 à 6, caractérisé en ce que le volant (8) est couplé au moteur (28) au moyen d'au moins une courroie trapézoïdale.
8. Concasseur à mâchoires (1) selon l'une quelconque des revendications 5 à 7, caractérisé en ce qu'il comprend une bielle d'entraînement sensiblement en forme de H (10) pour coupler
l'arbre (9) audit au moins un corps de concassage mobile (6), ladite bielle d'entraînement
(10) comprend deux branches (15) qui, à leur première extrémité, sont couplées de
façon excentrique à l'arbre (9) de part et d'autre du volant (8), et qui, à leur autre
extrémité, sont couplées de façon pivotante au corps de concassage (5), et qui sont
couplées de façon rigide l'une à l'autre par une partie transversale (16).
9. Concasseur à mâchoires (1) selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comprend des moyens de séparation (17) pour séparer des parties ferromagnétiques
des parties de moellon réduites.
10. Concasseur à mâchoires (1) selon la revendication 9, caractérisé en ce que les moyens de séparation comprennent un séparateur magnétique (17) qui est placé
dans le voisinage de l'ouverture de sortie.
11. Concasseur à mâchoires (1) selon la revendication 10, caractérisé en ce que le séparateur magnétique (17) comprend une courroie transporteuse sans fin (18) et
un aimant permanent pour générer un champ magnétique sur le côté de la courroie transporteuse
(18) qui, dans des conditions d'utilisation normales, constitue la face inférieure.
12. Concasseur à mâchoires (1) selon la revendication 11, caractérisé en ce que la courroie transporteuse (18) présente un profilage de surface (19).
13. Concasseur à mâchoires (1) selon la revendication 12, caractérisé en ce que le profilage de surface est formé par des nervures (19) qui s'étendent transversalement
à la direction de transport de la courroie transporteuse (18).
14. Concasseur à mâchoires (1) selon l'une quelconque des revendications 1 à 13, caractérisé en ce qu'il comprend au moins un vérin hydraulique (23) qui sert à régler la distance entre
les corps de concassage (5, 6) et qui est couplé de façon pivotante entre la benne
preneuse (2) et un corps de concassage non entraîné (5).
15. Concasseur à mâchoires (1) selon la revendication 14, caractérisé en ce qu'il comprend deux vérins hydrauliques (23) qui sont couplés de façon pivotante entre
la benne preneuse (2) et un corps de concassage non entraîné (5), et qui sont couplés
par un conduit de liquide fixe à une pompe de liquide partagée (24).
16. Concasseur à mâchoires (1) selon la revendication 15, caractérisé en ce que le conduit de liquide comprend un limiteur de pression.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description