CHARGEUR COMPORTANT DES SECTIONS DE BRAS ET DES JAMBES PARALLELES PRESENTANT UNE SECTION TRANSVERSALE OUVERTE

LOADER COMPRISING ARM SECTION AND PARALLEL STRUTS WITH AN OPEN CROSS SECTION

Abrégé français

La présente invention concerne un chargeur (1), qui comprend deux constructions de bras (2a, 2b) parallèles l'une à l'autre et constituant des sections de bras allongées (3, 3a), et des jambes parallèles (7) disposées au-dessus des sections de bras allongées (3, 3a). L'invention se caractérise en ce que chaque jambe parallèle (7) est constituée d'une construction de poutre allongée présentant une section transversale ouverte munie d'une ouverture longitudinale (Y) orientée vers la section de bras (3, 3a).

Abrégé anglais

The present invention concerns a loader comprising two arm constructions (2a,
2b) arranged parallel to each other, and which in turn constitute extended arm
sections (3, 3a) and parallel struts (7) arranged above the extended arm
sections (3, 3a). The invention is characterised in that each parallel strut
(7) is constituted by an extended beam construction with an open cross-section
demonstrating a longitudinal opening (Y) directed towards the arm section (3,
3a).

Revendications

4
CLAIMS
1. A loader comprising two arm constructions arranged parallel to each
other, and which in turn comprise extended arm sections and parallel struts
arranged above the extended arm sections, wherein:
each said parallel strut is free of fixed attachment to the respective
arm section to allow individual movement between each strut and its
respective arm section in use of the loader,
each parallel strut is constituted by an extended beam construction
with an open cross section demonstrating a longitudinal opening directed
towards the arm section, each parallel strut having a bent form along its
longitudinal direction,
the parallel strut comprises two side sections and a central section,
the two side sections of the parallel strut extend downwards a
certain extent on each side of the arm section, and
the central part is located above the arm section.
2. The loader according to claim 1 in which each side section sits
astride the arm section.
3. The loader according to claim 1 in which a space is limited by the
parallel strut and the arm section.
4. The loader according to claim 1 in which the parallel strut is
principally C-shaped or U-shaped when seen in a section transverse to the
direction of extension of the parallel strut.
5. The loader according to claim 1, further comprising a pair of bearing
boxes and a pair of joints, wherein each parallel strut includes a first end
attached to one of the pair of bearing boxes and a second end attached to
one of the pair of joints.

6. The loader according to claim 5, wherein each arm section includes a
first end attached to one of the bearing boxes and a second end attached
to one of the joints.
7. The loader according to claim 6, wherein the parallel struts and arm
sections are attached adjacent one another on the respective bearing boxes
and the joints.
8. The loader according to claim 1, wherein each end of the each said
parallel strut includes circular fittings through each side section thereof
each providing a bush location.

Description

CA 02581974 2009-06-16
LOADER COMPRISING ARM SECTION AND PARALLEL
STRUTS WITH AN OPEN CROSS SECTION
The present invention concerns a loader.
Vehicles, usually tractors used of various types of work, for example lifting
work, are previously known. The vehicles are normally provided with a
construction, for example, a base, fastening irons, brackets, or similar, on
which an arm construction, usually known as a "loader", is mounted.
The loader is an extended construction, an arm construction, comprising
two arms arranged parallel to each other and comprising extended arm
sections, linkage systems and joint constructions. The loader has at one
of its ends, the end that is facing towards the vehicle, two parts, arranged
parallel to each other and terminating the arms, to which cylinders and
other arm parts are attached. These parts are known as "bearing boxes".
Each bearing box is mounted onto, connects with, the vehicle.
The loader has at its second end, the foremost end, the end that faces
away from the vehicle, towards the working area, an attachment
arrangement that makes it possible to attach equipment at the outermost
end of the loader.
The arm construction of the loader comprises two arm sections, which
extend from the relevant bearing box to a first joint in the relevant arm,
and an essentially square or rectangular beam element, with a closed
profile, or a rod construction, which acts as a parallel strut at each arm.
Dirt, soil, snow and similar material in the surroundings of the loader tend
to become trapped between the parallel strut and the arm, and this
affects negatively the cleanliness aspects of the loader and it impairs the
mobility of the loader.
One aim of the present invention is to offer a parallel strut and a loader
with a design that is such that the problem described above is solved or at
least reduced.

CA 02581974 2010-07-28
2
According to the invention there is provided a loader comprising two arm
constructions arranged parallel to each other, and which in turn comprise
extended arm sections and parallel struts arranged above the extended
arm sections. Each of the parallel struts is free of fixed attachment to the
respective arm section to allow individual movement between each strut
and its respective arm section in use of the loader. Each parallel strut is
constituted by an extended beam construction with an open cross section
demonstrating a longitudinal opening directed towards the arm section,
each parallel strut having a bent form in its longitudinal direction. The
parallel strut comprises two side sections and a central section. The two
side sections of the parallel strut extend downwards a certain extent on
each side of the arm section and the central part is located above the arm
section.
The invention will be described in more detail below, with reference to the
drawings.
Figure 1 shows a loader according to the present invention.
Figure 2 shows a parallel strut according to the invention.
Figure 3 shows a cross-section S through the arm section of the loader
and the parallel strut according to the invention.
Figure 1 shows a loader 1 according to the present invention. The loader
1 is constituted by an extended construction, an arm construction,
comprising two arms 2a and 2b arranged parallel to each other. Those
parts that are present on both arms and that have the same design have
been given the same reference number.
Each arm 2a and 2b comprises in turn extended arm sections 3 and joints
4. The loader has at one of its ends A, the end that faces the vehicle, two
parts 5 that are parallel to each other and that terminate the arm parts to

CA 02581974 2010-07-28
2a
which control cylinders 6 and other arm parts are attached. These parts 5
are known as "bearing boxes". Each bearing box 5 is mounted onto and
connects with the vehicle, not shown in the drawing.
The first extended arm section 3a of the two arms extend between the
relevant bearing box 5 and the first joint 4 of the relevant arms 2a and
2b.
Each respective arm 2a and 2b comprises parallel struts 7 according to
the present invention. The parallel struts 7, two such for each loader, are
arranged above the first extended sections 3a of the two arms and they
are attached at their first end 7a to the relevant bearing box 5 and at
their second end 7b to the relevant joint 4.
Each parallel strut 7 is constituted by an extended beam construction with
an open cross-section, see Figure 2. The beam construction has
essentially the form of a "C" or a "U" when seen in a section perpendicular
to the longitudinal direction of the beam construction. The C form or the
U form entails the beam having two side sections 7.1 and 7.2 and a
central section 7.3 that connects the side sections to each other. The side
sections 7.1 and 7.2 are arranged essentially parallel to each other. An
open inner space X arises within the side sections 7.1 and 7.2 and the
central section 7.3, and an extended opening Y that extends along the
complete length L of the parallel strut is formed between the outer parts
7.1a and 7.2a of the side sections. The parallel strut 7 in its basic design
is open at the end sections 7a and 7b, but in order to make it possible to
mount the parallel strut 7 with surrounding parts in the arm construction
and in this way make possible the transfer of force from the parallel strut
7 to the parts that are arranged closest, there are at the end sections 7a
and 7b of the parallel strut welded attached bush locations Q that offer
attachment points and mounting points. These bush locations Q occupy
part of the space within the end sections of the parallel strut.

CA 02581974 2007-03-27
WO 2006/036105 PCT/SE2005/001372
3
Each parallel strut 7 is located such that the central section 7.3 is arranged
above and along
the relevant first arm section 3a, see Figure 3. The opening Y of the parallel
strut is directed
downwards towards the arm section 3a. The parallel strut 7 is arranged
relative to the first
arm section 3a such that, the parallel strut 7 sits astride the first arm
section 3a. The side
sections 7.1 and 7.2 are extended downwards a certain amount Z on each side of
the first
arm section 3a and cover in this way a region on each outer side 3.1 and 3.2
that is on each
opposite side and facing in the opposite direction of the relevant extended
first arm section
3a. The space X is then limited by and surrounded by the parallel strut 7
together with the
first arm section 3a. The parallel strut 7 and the first arm section 3a are
not fixed attached to
each other, and this allows the flexibility that is necessary between these
parts 3a and 7
since they carry out individual movements when the loader is used.
Since it can be said that the parallel strut 7 and the first arm section 3a
form together a unit
and since there is now no longer any space, no surfaces or volumes between the
parallel
strut 7 and the first arm section 3a, where dirt or snow can become trapped,
the loader has
become easier to keep clean, and its mobility has improved.
Since the parallel strut 7 has, according to the invention, the form of a C or
U, and thus has a
round upper section represented by the central section 7.3, dirt and snow will
slide off of the
parallel strut 7, which further improves the possibility of maintaining the
loader 1 clean, and
which also improves the mobility of the loader.
The parallel strut 7 demonstrates a form that is, partially or wholly, bent
along its longitudinal
direction. The parallel strut 7, the central section 7.3, is, along its
complete length L or along
parts of its length, bent. This bend along the longitudinal direction further
contributes to
facilitating the gliding off of snow and dirt from the parallel strut 7.
This description is not to be seen as a limitation of the invention. It is to
be seen as a guide to
full understanding of the invention in all of its parts. It should be realised
that other designs
are also possible than those that have been described above and shown in the
drawings,
and parts are possible within the framework of the innovative concept
specified in the
attached claims.
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