Support base for toolholder of a milling drum

1. A support base ( 1 ) adapted to be mounted to the surface ( 2 ) of a milling drum ( 3 ) defining a direction of rotation ( 31 ), said support base ( 1 ) including a recess ( 4 ) adapted to receive removably a shank portion ( 14 ; 21 ) of a body ( 5 ; 7 ) to be fixedly mounted to said support base ( 1 ),

said recess ( 4 ) being at least partly formed by a wall ( 103 ) including a slot ( 8 ) open at one end ( 83 ), said open end ( 83 ) being adapted for insertion of a fastening means ( 9 ) into said slot ( 8 ) for fixing said body ( 5 ; 7 ) to said support base ( 1 ), wherein said recess ( 4 ) includes a generally C-shaped first seat ( 10 ) formed by a first side surface ( 101 ), and a second side surface ( 102 ) opposite thereto, said first and second side surfaces converging to a third side surface ( 104 ) between said first and second side surfaces ( 101 , 102 );

wherein said support base ( 1 ) further includes a support surface ( 112 ) adjacent said second side surface ( 102 ) of said recess ( 4 ) and inclined thereto, a reaction surface ( 111 ) and said support surface ( 112 ) forming a generally dovetail shaped second seat ( 11 ) above and adjacent said first seat ( 10 ), and

wherein said wall ( 103 ) in which said slot ( 8 ) is formed has an outer surface ( 105 ) opposite to said third surface ( 104 ), said outer surface ( 105 ) includes an undercut ( 106 ) adapted to receive at least a portion of said fastening means ( 9 ).

2. Support base ( 1 ) of claim 1 , wherein said undercut ( 106 ) is adapted to rotatably receive a portion of said fastening means ( 9 ), said undercut ( 106 ) further has a machined surface adjacent said slot ( 8 ) and being provided for firmly bearing against a base surface ( 94 ) of said fastening means ( 9 ).

3. Support base ( 1 ) of claim 1 , further including a lateral hole ( 12 ) intersecting said reaction surface ( 111 ), said lateral hole ( 12 ) having a longitudinal axis ( 50 ) oriented to coincide with a predefined axis ( 60 ) of said body ( 5 ) supported by said support base ( 1 ).

4. Support base ( 1 ) of claim 1 , wherein grooves ( 113 , 114 ) are provided between said first side surface ( 101 ) and said reaction surface ( 111 ) and between said second side surface ( 102 ) and said support surface ( 112 ), respectively.

5. The support base ( 1 ) of claim 1 , wherein said first side surface ( 101 ) is adapted to contact said shank portion ( 14 ; 21 ) of said body ( 5 ; 7 );

said support base ( 1 ) further including said reaction surface ( 111 ) adjacent to said first side surface ( 101 ) and also facing in said direction of rotation ( 31 ), said reaction surface ( 111 ) being adapted to bear against a support surface ( 151 ) of said body ( 5 ; 7 ).

6. The support base ( 1 ) of claim 5 , wherein said reaction surface ( 111 ) and said first side surface ( 101 ) form an angle of greater than 180°.

7. The support base ( 1 ) of claim 5 , further including a lateral hole ( 12 ) intersecting said reaction surface ( 111 ), said lateral hole ( 12 ) having a longitudinal axis ( 50 ) oriented to coincide with a predefined axis ( 60 ) of said body ( 5 ) supported by said support base ( 1 ).

8. The support base ( 1 ) of claim 5 , wherein grooves ( 113 , 114 ) are provided between said first side surface ( 101 ) and said reaction surface ( 111 ) and between said second side surface ( 102 ) and said support surface ( 112 ), respectively.

9. The support base ( 1 ) of claim 1 , wherein said slot ( 8 ) is of a U-shaped profile having said open end ( 83 ) facing towards said second seat ( 11 ) and having generally vertical parallel side surfaces ( 81 ) and a concave bottom surface ( 82 ).

10. The support base ( 1 ) of claim 9 , wherein said first and second side surfaces ( 101 , 102 ) define centering planes which are symmetric about a center plane ( 50 ) of said slot ( 8 ).

11. A support base ( 1 ) mounted to the surface ( 2 ) of a milling drum ( 3 ) defining a direction of rotation ( 31 ), said support base ( 1 ) including a recess ( 4 ) adapted to receive removably a shank portion ( 14 ; 21 ) of a body ( 5 ; 7 ) to be fixedly mounted to said support base ( 1 ),

said recess ( 4 ) being at least partly formed by a wall ( 103 ) including a slot ( 8 ) open at one end ( 83 ), said open end ( 83 ) being adapted for insertion of a fastening means ( 9 ) into said slot ( 8 ) for fixing said body ( 5 ; 7 ) to said support base ( 1 ), wherein said recess ( 4 ) includes a generally C-shaped first seat ( 10 ) formed by a first side surface ( 101 ) facing in the direction of rotation of the milling drum ( 3 ) to which the support base ( 1 ) is mounted, and a second side surface ( 102 ) opposite thereto, said first and second side surfaces converging to a third side surface ( 104 ) between said first and second side surfaces ( 101 , 102 );

wherein said support base ( 1 ) further includes a support surface ( 112 ) adjacent said second side surface ( 102 ) of said recess ( 4 ) and inclined thereto, a reaction surface ( 111 ) and said support surface ( 112 ) forming a generally dovetail shaped second seat ( 11 ) above and adjacent said first seat ( 10 ).

12. The support base ( 1 ) mounted to the surface ( 2 ) of a milling drum ( 3 ) of claim 11 , wherein said first side surface ( 101 ) is adapted to contact said shank portion ( 14 ; 21 ) of said body ( 5 ; 7 );

said support base ( 1 ) further including said reaction surface ( 111 ) adjacent to said first side surface ( 101 ) and also facing in said direction of rotation ( 31 ), said reaction surface ( 111 ) being adapted to bear against a support surface ( 151 ) of said body ( 5 ; 7 ).

13. The support base ( 1 ) mounted to the surface ( 2 ) of a milling drum ( 3 ) of claim 12 , wherein said reaction surface ( 111 ) and said first side surface ( 101 ) form an angle of greater than 180°.

14. The support base ( 1 ) mounted to the surface ( 2 ) of a milling drum ( 3 ) of claim 12 , further including a lateral hole ( 12 ) intersecting said reaction surface ( 111 ), said lateral hole ( 12 ) having a longitudinal axis ( 50 ) oriented to coincide with a predefined axis ( 60 ) of said body ( 5 ) supported by said support base ( 1 ).

15. The support base ( 1 ) mounted to the surface ( 2 ) of a milling drum ( 3 ) of claim 12 , wherein grooves ( 113 , 114 ) are provided between said first side surface ( 101 ) and said reaction surface ( 111 ) and between said second side surface ( 102 ) and said support surface ( 112 ), respectively.

16. The support base ( 1 ) mounted to the surface ( 2 ) of a milling drum ( 3 ) of claim 11 , wherein said slot ( 8 ) is of a U-shaped profile having said open end ( 83 ) facing towards said second seat ( 11 ) and having generally vertical parallel side surfaces ( 81 ) and a concave bottom surface ( 82 ).

17. The support base ( 1 ) mounted to the surface ( 2 ) of a milling drum ( 3 ) of claim 16 , wherein said first and second side surfaces ( 101 , 102 ) define centering planes which are symmetric about a center plane ( 50 ) of said slot ( 8 ).

18. A support base ( 1 ) adapted to be mounted to the surface ( 2 ) of a milling drum ( 3 ) defining a direction of rotation ( 31 ), said support base ( 1 ) including a recess ( 4 ) adapted to receive removably a shank portion ( 14 ; 21 ) of a body ( 5 ; 7 ) to be fixedly mounted to said support base ( 1 ),

said recess ( 4 ) being at least partly formed by a wall ( 103 ) including a slot ( 8 ) open at one end ( 83 ), said open end ( 83 ) being adapted for insertion of a fastening means ( 9 ) into said slot ( 8 ) for fixing said body ( 5 ; 7 ) to said support base ( 1 ), wherein said recess ( 4 ) includes a generally C-shaped first seat ( 10 ) formed by a first side surfaces ( 101 ), a second side surface ( 102 ) opposite thereto, said first and second side surfaces converging to a third side surface ( 104 ) between said first and second side surfaces ( 101 , 102 ), the third side surface ( 104 ) extending in the direction of rotation of the milling drum ( 3 );

wherein said support base ( 1 ) further includes a support surface ( 112 ) adjacent said second side surface ( 102 ) of said recess ( 4 ) and inclined thereto, a reaction surface ( 111 ) and said support surface ( 112 ) forming a generally dovetail shaped second seat ( 11 ) above and adjacent said first seat ( 10 );

wherein said first side surface ( 101 ) is adapted to contact said shank portion ( 14 ; 21 ) of said body ( 5 ; 7 );

said support base ( 1 ) further including said reaction surface ( 111 ) adjacent to said first side surface ( 101 ) and also facing in said direction of rotation ( 31 ), said reaction surface ( 111 ) being adapted to bear against a support surface ( 151 ) of said body ( 5 ; 7 ); and

further including a lateral hole ( 12 ) intersecting said reaction surface ( 111 ), said lateral hole ( 12 ) having a longitudinal axis ( 50 ) oriented to coincide with a predefined axis ( 60 ) of said body ( 5 ) supported by said support base ( 1 ).

19. A support base ( 1 ) adapted to be mounted to the surface ( 2 ) of a milling drum ( 3 ) defining a direction of rotation ( 31 ), said support base ( 1 ) including a recess ( 4 ) adapted to receive removably a shank portion ( 14 ; 21 ) of a body ( 5 ; 7 ) to be fixedly mounted to said support base ( 1 ),

said recess ( 4 ) being at least partly formed by a wall ( 103 ) including a slot ( 8 ) open at one end ( 83 ), said open end ( 83 ) being adapted for insertion of a fastening means ( 9 ) into said slot ( 8 ) for fixing said body ( 5 ; 7 ) to said support base ( 1 ), wherein said recess ( 4 ) includes a generally C-shaped first seat ( 10 ) formed by a first side surface ( 101 ), a second side surface ( 102 ) opposite thereto, said first and second side surfaces converging to a third side surface ( 104 ) between said first and second side surface ( 101 , 102 ), the third side surface ( 104 ) extending in the direction of rotation of the milling drum ( 3 );

wherein said support base ( 1 ) further includes a support surface ( 112 ) adjacent said second side surface ( 102 ) of said recess ( 4 ) and inclined thereto, a reaction surface ( 111 ) and said support surface ( 112 ) forming a generally dovetail shaped second seat ( 11 ) above and adjacent said first seat ( 10 );

wherein said first side surface ( 101 ) is adapted to contact said shank portion ( 14 ; 21 ) of said body ( 5 ; 7 );

said support base ( 1 ) further including said reaction surface ( 111 ) adjacent to said first side surface ( 101 ) and also facing in said direction of rotation ( 31 ), said reaction surface ( 111 ) being adapted to bear against a support surface ( 151 ) of said body ( 5 ; 7 ); and

wherein grooves ( 113 , 114 ) are provided between said first side surface ( 101 ) and said reaction surface ( 111 ) and between said second side surface ( 102 ) and said support surface ( 112 ), respectively.