Pin and coupling system coupling between wear element and support of earthmoving machine

Abstract

The invention relates to a pin for coupling between a wear element and a support of earthmoving machinery and a coupling system, said system comprising a wear element, a support for receiving said wear element and a pin for ensuring retention between the wear element and its support. A female part is coupled to a male part, both parts remaining coupled by means of the pin of the invention, said pin comprising a main body, an elastic mass and a latch acting as a retention element. The pin interacts with the latch which locks the pin in place. Said pin prevents the female part from disengaging from its mounted position with the male part and thus retains the coupling between the two parts. The removable locking enables the pin to be removed from the coupling.

Claims

1. A pin (1) for connecting a wear-resistant element (50) and a support (60) in earthmoving machinery, said pin (1) having: - An elongated body (10) having two curved surfaces, namely a concave upper surface and a convex lower surface, the upper surface having an upper opening (11) for accessing a cavity within the body. - An elastic block (30) is disposed in the cavity of the body (10) and has an upper surface (33). Its features are, The pin includes: - A latch (20), said latch (20) being partially received in said cavity of said body (10), said latch (20) having: ○ Curved outer surface (21); ○ Upper surface (25) and lower surface (26), the upper surface (25) and the lower surface (26) are connected by the curved outer surface (21), and the lower surface (26) is in contact with the upper surface (33) of the elastic block (30); ○ A partially curved intermediate surface (22) opposite to the outer surface (21) and located after the upper surface (25); ○ Two flat side surfaces (23, 24); and ○ A cylinder (27) is arranged between the intermediate surface (22) and the lower surface (26) by means of the rotation axis of the latch (20), and the two ends (28, 29) of the cylinder extend beyond the two flat side surfaces (23, 24) of the latch (20). The cavity of the body (10) of the pin (1) has a guide (17) on its side wall, and the two ends (28, 29) of the cylinder (27) of the latch (20) are inserted into the guide (17) so that the latch (20) can rotate about an axis defined by the cylinder (27).

2. The pin according to claim 1, characterized in that, The upper surface (25) of the latch includes a slot (41).

3. The pin according to claim 1, characterized in that, The elastic block (30) has a density of 0.55 g / cm³. 3 The first compressible block (31) is made of porous polyurethane.

4. The pin according to claim 3, characterized in that, The convex lower surface of the body (10) includes a lower orifice for accessing the cavity.

5. The pin according to claim 4, characterized in that, In addition to the first compressible block (31), the elastic block (30) also includes a second rigid block (32) whose material is almost incompressible compared to the first compressible block (31), the second rigid block (32) being arranged below the first compressible block (31).

6. The pin according to claim 5, characterized in that, The second rigid block (32) is polyurethane with a hardness between 70 and 95 Shore A.

7. The pin according to claim 1, characterized in that, The lower surface (26) of the latch is flat.

8. The pin according to claim 1, characterized in that, The cavity of the body (10) has a circular gap for accommodating the cylinder (27) of the latch (20).

9. A connection system between a cavity-containing wear-resistant element (50) and a nose-containing support member (60) of earthmoving machinery, the support member (60) comprising a convex recess (61) in at least one of a plurality of surfaces of the nose, and the wear-resistant element (50) comprising a concave protrusion (51) in at least one of a plurality of surfaces constituting the cavity, such that when the nose is inserted into the cavity, the recess (61) and the protrusion (51) align to define a cavity, characterized in that, The coupling system includes a pin inserted into the cavity according to any one of claims 1 to 8.

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