Motor vehicle provided with a reinforcing structure

1. Motor vehicle ( 1 ) comprising:

a frame ( 2 );

a plurality of wheels rotatable with respect to said frame ( 2 ) about respective rotational axes;

a plurality of suspensions supporting said wheels ( 2 ) at variable relative distances with respect to said frame ( 2 );

said motor vehicle ( 1 ) defining a front portion ( 1 a ) and a rear portion ( 1 b ) with respect to an advancement direction (V) of said motor vehicle ( 1 ); said front portion (la) and said rear portion ( 1 b ) being opposite to each other along a longitudinal axis (X) of said motor vehicle ( 1 );

said frame ( 2 ) comprising a first body ( 4 ) arranged on said front portion (la) and a second body ( 5 ) arranged on said rear portion ( 1 b );

said motor vehicle ( 1 ) further comprising a subframe ( 10 ), to which at least some of said suspensions are attached; said subframe ( 10 ) being fixed to said second body ( 5 ) through the interposition of elastic insulator elements ( 11 ) at a plurality of fixing points ( 12 a , 12 b ); and

a reinforcing structure ( 15 ) directly attached to said frame ( 2 ) wherein said reinforcing structure ( 15 ) comprises a central plate ( 40 ); a third body ( 41 ) arranged on said front portion (la); and a fourth body ( 42 ) arranged on said rear portion ( 1 b ); said third body ( 41 ) comprising at least a first hole ( 43 , 44 ) and said fourth body ( 42 ) comprising at least a second hole ( 47 , 48 ); said first hole ( 43 , 44 ) and said second hole ( 47 , 48 ) being each aligned to a respective said fixing point ( 12 a , 12 b );

said subframe ( 10 ) being operatively interposed between said frame ( 2 ) and said reinforcing structure ( 15 ) and in contact with said frame ( 2 ) and said reinforcing structure ( 15 ).

2. Motor vehicle according to claim 1 , wherein said third body ( 41 ) comprises:

a first portion ( 41 a ) arranged on said central plate ( 40 ) and having a rectangular-shaped cross section in a plane orthogonal to a second axis (Y) orthogonal to said longitudinal axis (X);

a second portion ( 41 b ) opposite to said central plate ( 40 ) with respect to said first portion ( 41 a );

said first and second portion ( 41 a , 41 b ) being arranged in succession along said longitudinal axis (X);

said second portion ( 41 b ) having progressively decreasing extension parallel to a third axis (Z) orthogonal to said longitudinal axis (X) and to said second axis (Y), proceeding along said longitudinal axis (X) in the direction oriented from said central plate ( 40 ) to said first portion ( 41 a ).

3. Motor vehicle according to claim 2 , wherein said first hole ( 43 , 44 ) is arranged at said first portion ( 41 a ).

4. Motor vehicle according to claim 1 , wherein said reinforcing structure ( 15 ) is symmetrical with respect to a median plane (M) parallel to said longitudinal axis (X).

5. Motor vehicle according to claim 4 , wherein said subframe ( 10 ) comprises two front fixing points ( 12 a ) arranged on said front portion (la) and two rear fixing points ( 12 b ) arranged on the side of said rear portion ( 1 b );

said front fixing points ( 12 a ) being aligned to one another along a first direction (I) orthogonal to said longitudinal axis (X); said rear fixing points ( 12 b ) being aligned to one another along a second direction (J) parallel to said first direction (I);

said front fixing points ( 12 a ) being distanced from said rear fixing points ( 12 b ) parallel to said longitudinal axis (X);

wherein one of the two front fixing points ( 12 a ) is aligned along a third direction (K) to a respective rear fixing point ( 12 b ) arranged at a first half ( 10 a ) of said subframe ( 10 ) with respect to said median plane (M);

wherein the other of the two front fixing points ( 12 a ) is aligned along a fourth direction (L) to a respective rear fixing point ( 12 b ) arranged at a second half ( 10 b ) of said subframe ( 10 ) with respect to said median plane (M) of said subframe ( 10 );

said third direction (K) and said fourth direction (L) being incident to each other.

6. Motor vehicle according to claim 5 , wherein said front fixing point ( 12 a ) and said rear fixing point ( 12 b ) arranged at said first half ( 10 a ) are arranged symmetrically to said front fixing point ( 12 a ) and said rear fixing point ( 12 b ) arranged at said second half ( 10 b ) with respect to said median plane (M).

7. Motor vehicle according to claim 5 , wherein said front fixing points ( 12 a ) are arranged at a same first coordinate with respect to a third axis (Z) orthogonal to said longitudinal axis (X) and vertical, in use;

said rear fixing points ( 12 b ) being arranged at a same second coordinate with respect to said third axis (Z);

said front fixing points ( 12 a ) being arranged below said rear fixing points ( 12 b ) with respect to the ground on which said motor vehicle ( 1 ) rests.

8. Motor vehicle according to claim 1 , wherein said frame ( 2 ) comprises a plurality of third holes ( 51 ) and said subframe ( 10 ) comprises a plurality of fourth holes ( 13 );

said fourth holes ( 13 ) being each arranged at a respective said fixing point ( 12 a , 12 b );

each said elastic insulator element ( 11 ) comprising an elastic bushing ( 110 ) housed at a respective said fourth hole ( 13 );

said motor vehicle ( 1 ) further comprising connection elements ( 50 ) for fixing said reinforcing structure ( 15 ) to said frame ( 2 );

wherein each said connection element ( 50 ) engages one said first hole ( 43 , 44 ) or one said second hole ( 47 , 48 ); each said connection element ( 50 ) engaging in addition and at the same time one respective said third hole ( 51 ) and one respective said elastic bushing ( 110 ).

9. Motor vehicle according to claim 8 , wherein each said connection element ( 50 ) comprises:

a screw ( 60 ) defining a first axial end ( 60 a ) arranged on said frame ( 2 ) and a second axial end ( 60 b ) opposite to said first axial end ( 60 a ) and arranged on said reinforcing structure ( 15 );

a nut ( 70 );

each said screw ( 60 ) comprising, proceeding from said first axial end ( 60 a ) towards said second axial end ( 60 b ):

a first threaded stretch ( 61 ) engaging a respective third hole ( 51 );

a second stretch ( 62 ) engaging a respective said elastic bushing ( 110 );

a third stretch ( 63 ) engaging said reinforcing structure ( 15 ); and

a fourth threaded stretch ( 64 ) protruding beyond said reinforcing structure ( 15 ) on the side opposite to said frame ( 2 );

said nut ( 70 ) engaging said screw ( 60 ) at said fourth stretch ( 64 ).