U.S. patent application number 15/136107 was filed with the patent office on 2017-08-24 for lip with exchangeable noses.
The applicant listed for this patent is Minetec S.A.. Invention is credited to Fernando DE LA FUENTE, Bernardo VERA, Claudio ZAMORANO.
Application Number | 20170241109 15/136107 |
Document ID | / |
Family ID | 59630551 |
Filed Date | 2017-08-24 |
United States Patent
Application |
20170241109 |
Kind Code |
A1 |
DE LA FUENTE; Fernando ; et
al. |
August 24, 2017 |
LIP WITH EXCHANGEABLE NOSES
Abstract
A rolled lip in which the form of attachment of the noses to the
lip prevents the area of attachment to reach a maximum stress, thus
reducing the risk of fractures in said area of attachment
facilitating machining of the nose in which the lip has grooves
projecting from the edge into the lip body; the noses have an area
which forms a protrusion in which said protrusion is located in the
rear half of the nose on the opposite side of the front; the
attachment of the protrusion to the lip is welded all around it and
forms one or two channels forming a weld filler area; the shape,
quantity and distribution of the channels may vary independently
using a channel on the lip or a channel under the lip or a channel
on the lip and another under the lip simultaneously; the weld
filler area may be above and/or below the lip; the protrusions of
the noses fit in the grooves of the lip.
Inventors: |
DE LA FUENTE; Fernando;
(Santiago, CL) ; ZAMORANO; Claudio; (Santiago,
CL) ; VERA; Bernardo; (Santiago, CL) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Minetec S.A. |
Santiago |
|
CL |
|
|
Family ID: |
59630551 |
Appl. No.: |
15/136107 |
Filed: |
April 22, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
E02F 3/40 20130101; E02F
9/2816 20130101; E02F 9/2858 20130101 |
International
Class: |
E02F 9/28 20060101
E02F009/28 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 23, 2016 |
CL |
0406-2016 |
Claims
1. A rolled lip in which the form of attachment of noses to the lip
prevents the area of attachment to reach a maximum stress, thus
reducing the risk of fractures in said area of attachment, wherein:
the lip has a plurality of grooves projecting from an edge into a
lip body; the noses have an area which forms a protrusion, wherein
said protrusion is located in a rear half of the nose on an
opposite side of a front of the nose; the protrusion is attached to
the lip by a weld forming one or two channels around at least one
of the plurality of grooves, forming a weld surrounding the rear
half of the nose; the weld being above and/or below the lip; and
the protrusions of the noses fit entirely within the grooves of the
lip.
2. A rolled lip according to claim 1, wherein the attachment of the
protrusion to the lip includes welding using cored wire or a stick
electrode.
3. A rolled lip according to claim 1, wherein the lip is rolled or
cast and the grooves are machined or oxy-cut in the lip.
4. A rolled lip according to claim 3, wherein the grooves are
carried out with semiautomatic oxy-cut or machining.
5. A rolled lip according to claim 1, wherein the noses comprise
steel.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of co-pending Chilean
Patent Application No. 0406-2016, filed 23 Feb. 2016, which is
incorporated herein as though fully set forth.
TECHNICAL FIELD
[0002] The present disclosure is developed in the field of elements
for earthwork equipment, it is specifically related to a large
rolled and folded or cast steel lip for excavator bucket, and a
method for attachment of the lip to the noses.
DESCRIPTION OF THE PRIOR ART
[0003] In the prior art, the nose and lip are usually an integral
piece of cast steel. In this case, the area where the maximum
stress occurs is at the base of the nose, in a plane that is normal
to the longitudinal axis of the nose.
[0004] Application US D705,275 is part of the prior art. Said
document discloses in FIG. 1 the usual way in which the noses are
attached to form a lip. In this case, the nose is attached by
direct flush welding on the front edge of the lip. In this
attachment setting, a maximum stress is required at the base of the
nose, in a plane that is normal to the longitudinal axis of the
nose, as explained above.
[0005] The attachment solution of the present invention proposes an
attachment that is outside the plane of maximum stress, because the
nose is not welded to the edge of the lip, resulting in an
increased reliability of the attachment of the nose to the lip.
[0006] Application U.S. Pat. No. 5,709,043 is also a part of the
prior art, which shows an attachment of a lip to a nose, in which
the attachment of these two components is carried out partially on
the edge (z) of contact between the tooth and the lip, as shown in
FIG. 2. It can be seen that the attachment is carried out on the
back of the tooth on the surface of the lip and around it, which,
due to the use, tends to cause a rupture in the attachment in the
area indicated x-x. Faced with this problem, the present invention
prevents this rupture because the attachment by welding the back of
the nose is carried out butt, reaching full penetration, and the
back of the nose is introduced into a groove, preventing the stress
indicated.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 shows a lip of the prior art, in which a traditional
method of attaching the noses to the lip is observed.
[0008] FIG. 2 shows a detail of a lip of the prior art, where the
parts which require the stress of the noses are shown.
[0009] FIG. 3 shows a lip with the nose attaching system of the
present invention
[0010] FIG. 4A shows a top view and detail of an installed nose
according to the attaching system of the present invention and FIG.
4B shows a top isometric view and detail of an installed nose,
according to the attaching system of the present invention.
[0011] FIG. 5 shows a nose of the present invention that has not
been attached to the structure of the lip.
[0012] FIG. 6 shows a lip of the present invention, in which noses
have not been attached.
[0013] FIG. 7 shows a view and a cut of the attachment of the nose
to the lip.
DETAILED DESCRIPTION OF THE INVENTION
[0014] The Invention proposed modifies the initial design of a lip,
preventing that the area of attachment of the noses to the lip (1),
which can be rolled or cast steel, whatever it reaches the maximum
stress, and the design is optimized by moving the welding
attachment (2) away from the area of maximum stress, thus reducing
the risk of fractures in the area of attachment of the nose to the
lip, and possible ruptures caused by excess impact load on the lip
(1). Other advantages of using this attachment system for teeth (3)
are that machining of the nose is facilitated since the nose is
manufactured independently, facilitating the attachment of said
nose, and also that low stress occurs in the area of welding. Noses
are made of high-strength structural steel, anti-abrasive steel or
impact-resistant steel.
[0015] The proposed invention considers a lip with grooves (4)
projecting from the edge (11) into the lip body (1), which are
machined or oxy-cut and fit perfectly with protrusions (7) located
in an area in the rear half of the nose (3), on the opposite side
of the front (8). Said protrusions (7) are welded inside the groove
(4) all around it and in its entire thickness, forming a single
continuous welding and forming a weld filler area attachment (2) of
great firmness between the nose (3) and the lip (1). The shape of
the protrusion (7) and the grooves on the lip (4) may be any which
provides a good attachment and straight and curved edges, and said
shape is not necessarily limited to that illustrated in the figures
of this utility model. The carving of the grooves is carried out
using semi-automatic oxy-cut or machining (milling).
[0016] The attachment of the protrusion (7) of the nose to the
groove (4) of the lip comprises one or two channels (14), as shown
in FIG. 7, which shows two channels (14), top and bottom, which at
the time of welding form a weld filler area (2) which may be above
and/or below the lip (1). The shape, quantity and distribution of
the channels (14) may vary using independently a channel on the lip
or a channel under the lip, or as illustrated in FIG. 7, a channel
on the lip and another under the lip simultaneously. The welding
used may be cored wire, stick electrode or any other that applies
to the type of steel.
* * * * *