U.S. patent application number 10/822809 was filed with the patent office on 2004-12-09 for assemblies of teeth of earth moving machines.
This patent application is currently assigned to MATALOGENIA, S.A.. Invention is credited to Bertran, Nil Vallve I., Molino, Javier Puevo, Moreno, Jorge Pallas, Ruiz, Rafael Ferrer.
Application Number | 20040244235 10/822809 |
Document ID | / |
Family ID | 8310106 |
Filed Date | 2004-12-09 |
United States Patent
Application |
20040244235 |
Kind Code |
A1 |
Molino, Javier Puevo ; et
al. |
December 9, 2004 |
Assemblies of teeth of earth moving machines
Abstract
The improvements provide for the lugs of the tooth to have
stepped guides at the top and bottom which combine with widened end
regions for greater reinforcement and with a projecting internal
abutment in at least one of said lugs, capable of being-guided in a
corresponding straight guide of the tooth holder, being arranged,
after it is mounted, so as to retain the pin from behind, which pin
is arranged in a pin seating arranged generally vertically in the
body of the tooth holder, with a gently curved and inclined
structure.
Inventors: |
Molino, Javier Puevo;
(Barcelona, ES) ; Moreno, Jorge Pallas; (El
Masnou, ES) ; Bertran, Nil Vallve I.; (Cabrils,
ES) ; Ruiz, Rafael Ferrer; (Barcelona, ES) |
Correspondence
Address: |
SUGHRUE MION, PLLC
2100 PENNSYLVANIA AVENUE, N.W.
SUITE 800
WASHINGTON
DC
20037
US
|
Assignee: |
MATALOGENIA, S.A.
|
Family ID: |
8310106 |
Appl. No.: |
10/822809 |
Filed: |
April 13, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
10822809 |
Apr 13, 2004 |
|
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10089596 |
Aug 16, 2002 |
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10089596 |
Aug 16, 2002 |
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PCT/ES00/00364 |
Sep 28, 2000 |
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Current U.S.
Class: |
37/450 |
Current CPC
Class: |
E02F 9/2841 20130101;
E02F 9/2825 20130101 |
Class at
Publication: |
037/450 |
International
Class: |
E02F 009/28 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 1, 1999 |
ES |
9902161 |
Claims
1. A coupling for a tooth of earth-moving machines, comprising
projecting lugs on the tooth configured to couple with matching
seatings of a tooth holder and a transverse seating for a pin, the
lugs of the tooth longitudinally have stepped guides on upper and
lower edges of the lugs and which continue in an area of attack in
widened abutment regions to obtain greater reinforcement, combined
with matching profiles of said stepped guides and widened regions
in a body of the tooth holder and with an internal projecting
abutment arranged in at least one of said lugs, configured to be
guided in an internal part of a corresponding straight guide of the
tooth holder, said abutment, after mounting of the tooth in the
tooth holder, arranged to retain the pin, the pin disposed in a pin
seating provided in a generally vertical arrangement in the body of
the tooth holder.
2. The coupling according to claim 1, wherein the widened abutment
regions have a curved shape.
3. The coupling according to claim 1, wherein the widened abutment
regions are in a shape of an inclined plane.
4. The coupling according to claim 1, wherein the widened regions
are in a shape of a straight step.
5-6. (canceled).
7. The coupling according to claim 1, wherein the lugs of the tooth
have transversely a flat or curved shape.
8. The coupling according to claim 1, wherein the straight guide of
the tooth holder is formed on a nose of the tooth holder for the
internal abutment of the lugs of the tooth, and extend for a length
shorter than a total length of said nose of the tooth holder, in
order to obtain greater mechanical strength.
9. The coupling according to claim 1, wherein the straight guide of
the tooth holder is formed on a nose of the tooth holder for the
internal abutment or abutments of the lugs of the tooth and extend
as far as a rear end of said nose with its open end.
10. The coupling according to claim 1, comprising an arrangement of
an inlet chamfer in an opening for introduction of the pin, in
order to improve mounting and disassembly of the pin.
11. (canceled).
Description
[0001] The present invention relates to improvements introduced
into couplings for machines intended for earth-moving, providing
appreciable characteristics of novelty and inventive activity with
respect to the coupling a known in the art for the aforesaid
purpose.
[0002] In particular, the couplings of the present invention will
be applicable to loading and excavating machines in their various
versions and types, although, more widely, they will be applicable
to all earth-moving machines which have a working bucket provided
with a rim having exchangeable teeth intended to cut into the earth
which is to be worked.
[0003] The present invention is intended to provide appreciable
functional improvements in the coupling part of the tooth and the
tooth holder, providing greater strength and reinforcing the
coupling region of the lugs of the tooth, eliminating possible
concentrations of stresses. It is also possible to increase the
surfaces resisting vertical stresses, and in general a greater
penetration is achieved.
[0004] Similarly, the seating of the pin is arranged in the body of
the tool holder and not in the nose of the tooth, as is customary,
its arrangement being generally vertical and on one side of
said-body of-the tool holder, being able to be straight or having a
slight curvature. In a front view, the seating will customarily be
inclined outwards, since it follows the course of the lateral
surfaces of said body. Moreover, the seating has chamfers on the
inlet edges in order to improve the mounting of the pin, especially
in the course of work in the field.
[0005] For greater understanding thereof, explanatory drawings of a
preferred embodiment of the present invention are appended by way
of non-limiting example.
[0006] FIG. 1 is a perspective view of an assembly of tooth and
tooth holder which incorporates the present invention.
[0007] FIG. 2 is a view in side elevation of the same assembly as
in FIG. 1.
[0008] FIG. 3 is a plan view of the same assembly as in FIG. 1.
[0009] FIG. 4 shows a longitudinal section through the plane
indicated.
[0010] FIG. 5 shows a section through a horizontal plane, as
indicated in FIG. 2.
[0011] FIG. 6 is a perspective view of the tooth holder of the
present invention.
[0012] FIG. 7 is a plan view of the coupling end of the tooth
holder.
[0013] FIG. 8 is a front perspective view of the tooth.
[0014] FIG. 9 is a rear perspective view of the same tooth.
[0015] FIGS. 10 to 14 show cross sections of the assembly of tooth
and tooth holder according to the section planes indicated in FIG.
2.
[0016] FIG. 15 is a view of the tooth holder in side elevation.
[0017] FIG. 16 shows a section through a horizontal plane of the
tooth holder indicated in FIG. 15.
[0018] FIGS. 17 and 18 show cross sections through the planes
indicated in FIG. 15.
[0019] FIGS. 19 and 20 show respective perspective views of
alternative embodiments of the tooth holder according to the
present invention.
[0020] FIG. 21 shows a diagrammatic longitudinal section through a
tooth holder according to the invention, showing a completely
mounted pin.
[0021] FIG. 22 is a view in ski Ovation of a tooth holder according
to the present invention, showing the seatings or guides for the
tooth in a through arrangement, that is to say, opening into the
end of the nose of the tooth holder.
[0022] FIG. 23 shows a cross section through a tooth holder with
lugs of the tooth having a transversely curved shape.
[0023] FIGS. 24, 25 and 26 respectively show a perspective view, a
view in front elevation and a view in side elevation of the
pin.
[0024] FIG. 27 shows a longitudinal section through the assembly of
tooth and tooth holder, showing the pin in section.
[0025] As can be observed in the figures, the assembly of tooth and
tooth holder, once mounted, has the structure shown in FIGS. 1 to
5, in which can be seen the tooth holder 1 and the tooth 2, coupled
to each other, and the lateral lugs 3 and 4 which are introduced
into respective seatings of the tooth holder 1, the constitution of
which will be explained in detail, and likewise there will be
observed the upper opening 5 for the fixing pin for the tooth and
tooth holder.
[0026] The seating of the pin, the general orientation of which is
vertical, has, in detail, a structure in which there stands out a
slight curvature and a slightly inclined arrangement, as will be
observed in a front view, with a trajectory substantially parallel
to the lateral outer surface of the nose of the tooth holder.
[0027] The aforesaid arrangement will be noted especially in FIG.
11, in which there is also to be observed the arrangement of an
upper chamfer 6, intended to improve the introduction of the
pin.
[0028] The arrangement of the seating 5 of the pin in the body 1 of
the tooth holder and not in the nose makes it possible to obtain
greater robustness of the latter and removes the pin from the area
of attack of the assembly, protecting it in great measure against
wear. The generally vertical arrangement of the seating of the pin
facilitates its mounting and disassembly, while its possible
inclination and curvature allow the pin to be retained in the
guide, being trapped from behind by the abutment provided at the
end of one of the lugs, as will be explained hereinafter.
Similarly, the curvature of the seating removes the hole from the
front end wall, avoiding the creation of weak areas subject to
breakage.
[0029] The constitution of the seating of the pin and the securing
of the tooth make it possible to design the pin with a length
shorter than that of the seating, so that the ends are not flush
with the body of the tooth holder, which reduces the wear on the
pin and reduces impacts, avoiding not only deterioration but also
the possibility of loss of the pin, as occurs in some cases at
present.
[0030] As will be understood, although the constitution of the pin
and its seating will comply with the preferred version which has
been described, the seating could have no curvature, being
completely straight, or have a curvature in the opposite direction
to that shown. Similarly, the inclination of the seating in a
lateral direction could be reduced or eliminated.
[0031] Moreover, the seating may be arranged on one side or the
other of the tooth holder or simultaneously on both sides for
applications where the work is very hard. A second pin could also
be incorporated in order to ensure the securing of the tooth in the
tooth holder and increase the stability and robustness.
[0032] The lugs 3 and 4 of the tooth are housed in lateral cavities
of the tooth holder which are preferably slightly inclined, one of
them being indicated by the number 7 in FIG. 6. The lugs 3 and 4
preferably have an inclination which corresponds to the course of
the lateral walls of the tooth holder, that is to say, as can be
observed in the figures, a transverse inclination according to
which the upper edges are arranged further towards the interior
than the lower edges. That is to say, an inclination which
corresponds to a certain rotation of the lugs on their longitudinal
axes so that the upper edges and the lower edges of the lugs are in
different vertical planes. If desired, said angle of inclination
may be zero. Said cavities have a stepped section, combining
different types of flat, curved and other surfaces. It determines
the lateral partition walls 8 and 9 which in turn have respective
steps 10 and 11 for joining to widened abutment regions 12 and 13
which preferably have a curvature such as that indicated by the
number 14, corresponding to the lower part, but which could also
form a wide inclined plane or a straight step or other suitable
shape to widen the bearing area. Into the cavity 7, which
corresponds to the seating 5 for the pin, the wall of the seating
for the pin, as can be observed in FIG. 6 Similarly, in the front
part 15 and in the rear part 16 of the cavity 7 there are
respective aligned seatings 17 and 18 which constitute a straight
guide intended to permit the passage of the end abutment 20 of the
lug of the tooth, for retention of the pin which passes through the
tooth holder. The length of the groove formed by the passages 17
and 18 may be less than the total length of the nose or projection
19 intended to fit together with the tooth holder, in order in this
way to obtain a greater useful section and, therefore, greater
strength. Nevertheless, as shown in FIG. 22, the tooth holder 43
may have a seating 44 to receive the tooth of the tooth holder
which is of the through type, that is to say, which opens into the
end of the nose or rear projection 45.
[0033] The lateral abutment projection for guiding the tooth in the
tooth holder, provided on one of the lateral lugs, for example the
lug 3, has been shown in FIG. 10, in which can be observed said
abutment 20, which is introduced into the guide provided in the
lateral seating cavity of the tooth holder.
[0034] The precise shape of the nose 19 may be varied without this
affecting the constitution of the actual coupling part between the
tooth and the tooth holder, which basically affects the lugs 3 and
4, as well as their corresponding seatings and the seating for the
pin in a special arrangement in the body of the tooth holder.
[0035] Into the present invention different variations may be
introduced which will remain within the scope thereof as indicated
in the claims. Thus, for example, the seatings of the lugs, which
have a certain inclination in the example shown, could have no
inclination or could be perpendicular to the base or arched.
[0036] Similarly, the internal stepped shape of the lugs and of the
matching cavities of the tooth holders could be a combination of
two different surfaces, for example, flat/flat or flat/curved,
curved/curved or of some other type. Provision could also be made
for the cavities not to have a stepped shape, with a single surface
which may be flat or rounded. Alternatively, the cavities may have
a right-angled shape and the guide for the tooth in the tooth
holder could be arranged on one side or the other or on both
simultaneously.
[0037] It will also be understood that the guide for the tooth in
the tooth holder, the length of which is preferably limited to only
a part of the length of the nose of the tooth holder, could also
extend for the entirety thereof.
[0038] The lugs 3 and 4 of the tooth are composed of stepped guides
and curved regions. In FIG. 9 can be seen, for example for the lug
4, the stepped guides 21 and 22, and also the curved end regions 23
and 24.
[0039] The lugs are slightly inclined parallel to the lateral
surfaces of the nose of the tooth holder, and during the mounting
of the tooth are fitted into the lateral cavities thereof. The
stepped guides, such as those indicated by the numbers 21 and 22,
are a combination of flat surfaces. One of the lugs, which has been
indicated in the drawings by the number 3, has a transverse
aperture 25 for inspecting the introduction of the pin and for
facilitating its disassembly by means of the introduction of a
tool.
[0040] According to the present invention, the stepped guides are
intended to guide the mounting of the tooth in the tooth holder and
to stabilize the assembly. The abutment 20 provided at the end of
one of the lugs is intended to retain the pin by its rearward
part.
[0041] The curved regions, such as those indicated by the numbers
23 band 24, serve to reinforce the lug against vertical stresses on
increasing the flat surface and the section, distributing the
vertical stresses better.
[0042] Moreover, with regard to the specific shape of the lugs,
provision may be made for abutments to be arranged on both in the
case of a double guide providing for the coupling of two pins, as
in the version shown in FIGS. 17 and 18, in which the nose 26 of
the tooth holder has two lateral guides 27 and 28 for respective
pins housed in the respective pin seatings 29 and 30.
[0043] FIG. 19 shows an alternative embodiment of a tooth holder 31
with a coupling projection or nose 32, which has the end appendage
33 of substantially square or rectangular prismatic shape, having
longitudinal ribs 34 and 35 as well as grooves 36 which are not of
the through type, the remainder of the tooth holder corresponding
essentially to the features of the invention as shown especially in
FIG. 6.
[0044] FIG. 20 shows a further alternative embodiment 37, in which
the rear projection or nose 38 has an appendage 39 having a
substantially hexagonal section with straight ribs 40 and 41 on the
sides. One of the lateral grooves has also been shown, indicated by
the number 42, the remainder of the tooth holder corresponding to
the present invention according to the versions previously
indicated.
[0045] FIG. 21 shows a tooth holder 46 having a pin seating
generally arranged as explained previously, indicated by the number
47, and corresponding in this case to a curved version of arched
shape in the interior of which is housed the pin 48 carrying a
centring and retaining addition 49 supported by a resilient block
50 and the frontal expansion of which introduces the retaining
means partially into the guide groove 51.
[0046] FIG. 23 shows a version in which the tooth holder body 52
has coupled to it the lugs 53 and 54 of the tooth, which have an
arched cross section and which adapt to a matching shape of the
receiving grooves of the tooth holder.
[0047] As shown in FIGS. 24, 25 and 26, the pin 48, which in the
case illustrated has a generally arched shape, but which obviously
could also be straight, has the centring and retaining member
formed by the resilient block 50 and the metallic block 55, which
has at the top and bottom respective additional guiding fins 56 and
57 narrower than the projecting metallic block 55, being housed in
grooves of matching shape of the pin 48.
[0048] FIG. 27 shows a section through a horizontal plane of an
assembly of tooth 58 and tooth holder 59. In said section can be
seen the pin 60, which has incorporated in it the resilient block
61 and the metallic projection 62, the structures of which
correspond to those indicated in FIGS. 24 to 26.
* * * * *