ES2304330B1 - EXCAVATOR ARM HITCH SYSTEM. - Google Patents

Abstract

Excavator arm hitch system that, comprising a first coupling means (1) fixed to the arm of the excavator and a second medium (2) fixed to the accessory or bucket (3) where the first coupling means (1) comprises at least two parallel bolts (10), placed transversely to two plates (11) parallel, elongated rectangular configuration, and where in its lower part there is a concavity (12) essentially semicircular; and where the second coupling means (2) it comprises at least; two lugs (20) parallel configuration elongated with two retention housings (21A, 21B) of the bolts of the first means (1).

Description

Excavator arm hitch system.

Object of the invention

The object of the present invention is a system hitch between excavator arm and excavation bucket that gives essential novelty characteristics with respect to currently collected in the state of the art. More concretely,  the coupling system that is recommended includes the use of means of coupling between arm and dipper, where sayings based on use of bolts between parallel plates and allow the coupling of arm with the bucket regardless of arm position.

Background of the invention

Currently, the hooks between the arms of the excavators and the corresponding accessories, are made generally through couplings based on articulated connecting rods that determine a great distance between arm and accessories.

This distance between arms and accessories, determines a lower maneuverability of the set, as well as a lower power and resistance of excavators.

These problems are solved by the patent Spanish with application number P200200454 of the same applicant. However, this patent has the problem of reversibility, since the hitch position is unique, being desirable that said hook get them to be attached frontally, in addition to the standard position

Description of the invention

To alleviate the problems described above, presents the excavator arm hitch system that, comprising a first fixed coupling means to the arm of the excavator and a second medium fixed to the accessory or bucket where:

(i) the first coupling means comprises, at least two parallel bolts, placed transversely to two parallel plates, elongated rectangular configuration, and where in its lower part presents a concavity essentially semicircular, the anterior and posterior edges being equal length and provided with a plurality of holes, at least one for the anterior zone and another for the posterior zone; in such a way that said plates are symmetrical with respect to their central axis; Y

(ii) the second coupling means comprises, at least two parallel lugs with an elongated configuration with two retention housings of the bolts of the first means, as well as a plurality of holes suitable for facing and coinciding with the holes of the first means, in such a way that allow the passage of an additional bolt for fixing both means;

and where the second coupling means they have a separation between lugs greater than the separation between plates of the first media, the second being also coupling means centered on the top of the bucket or accessory.

Thanks to the described arrangement you get a reversibility in the hitch between arm and accessory, characteristic is novel in the state of the art.

Brief description of the figures

Then it goes on to describe very brief a series of drawings that help to better understand the invention and that expressly relate to an embodiment of said invention presented as a non-limiting example of is.

Figure 1.- Perspective view of the system excavator arm hitch, object of the present patent of invention.

Figure 2.- View of the joint between arm and coupling using the system object of the invention, in two positions (figures 2A and 2B).

Preferred Embodiment of the Invention

As can be seen in Figure 1, the excavator arm hitch system which, comprising a first fixed coupling means to the excavator arm and a second medium fixed to the accessory or saucepan where:

(i) the first coupling means (1) It comprises at least two parallel bolts (10), placed transversely to two parallel plates (11) of configuration elongated rectangular, and where in its lower part there is a concavity (12) essentially semicircular, the edges being anterior (13A) and posterior (13B) of equal length and provided of a plurality of holes (14), at least one for the zone anterior and another for the posterior area; in such a way that these plates are symmetrical with respect to their central axis (E); Y

(ii) the second coupling means (2) comprises at least two parallel lugs (20) of configuration elongated with two retention housings (21A, 21B) of the bolts of the first means (1), as well as a plurality of holes (22) suitable to be faced and coinciding with the holes (14) of the first means (1), such that allow the passage of an additional bolt for fixing both media;

and where the second coupling means (2) have a separation between lugs (20) greater than the separation between plates (11) of the first means (1), being also the second coupling means (2) centered on the upper part of the bucket or accessory (3).

The coupling between the first means (1) and the second means (2) materializes by hosting any of the bolts (10) of the first means (1) in any of the retention housings (21A, 21B) of the second means (2), as well as through a bolt through the opposite holes (14, 22) of the first (1) and second means (2).

At least one of the retention housings of the second means (2) is shaped like a hook (21), providing in addition to welded reinforcements (23) on the sides of the lugs (twenty).

Figure 2A shows the union of the saucepan with the arm in a standard position, that is, as it is done normally, where reference (A) is referred to the cylinder of actuation of the arm and the reference (B) corresponds to the arm of the excavator. Figure 2B shows the connection of the saucepan with the arm in a frontal position, as possible thanks to the described invention, where references (A) and (B) have the same meaning as in figure 2A.

Claims (3)

1. Excavator arm hitch system which, comprising a first fixed coupling means to the excavator arm and a second medium fixed to the accessory or bucket characterized in that (i) the first coupling means (1) It comprises at least two parallel bolts (10), placed transversely to two parallel plates (11) of configuration elongated rectangular, and where in its lower part there is a concavity (12) essentially semicircular, the edges being anterior (13A) and posterior (13B) of equal length and provided of a plurality of holes (14), at least one for the zone anterior and another for the posterior area; in such a way that these plates are symmetrical with respect to their central axis (E); Y (ii) the second coupling means, (2) comprises at least two parallel lugs (20) of configuration elongated with two retention housings (21A, 21B) of the bolts of the first means (1), as well as a plurality of holes (22) suitable to be faced and coinciding with the holes (14) of the first means (1), such that allow the passage of an additional jester for fixing both media; and where the second coupling means (2) have a separation between lugs (20) greater than the separation between plates (11) of the first means (1), being also the second coupling means (2) centered on the upper part of the bucket or accessory (3). 2. System according to claim 1 characterized in that the coupling between the first means (1) and the second means (2) is materialized by housing any of the jesters (10) of the first means (1) in any of the retention housings (21A , 21B) of the second means (2), as well as by a bolt passing through the opposite holes (14, 22) of the first (1) and second means (2). 3. System according to claims 1 and 2 characterized in that at least one of the retaining housings of the second means (2) is hook-shaped (21A), and because said retention housings have welded reinforcements (23) on the sides of the lugs (20).