Foot brake valve of an air brake system

1. A foot brake valve ( 2 ′) of a pneumatic brake system in a motor vehicle, the foot brake valve comprising:

an installation plate ( 4 ′, 4 ″), on which a brake pedal ( 14 ) is pivotably mounted and to which a housing ( 18 ′, 18 ″; 28 ) of a control unit ( 16 , 26 ) is fastened,

a spring-loaded plunger piston ( 36 ) in an actuating contact with the brake pedal ( 14 ) and guided axially movably in a first annular collar ( 50 , 72 ), which projects upward out of the installation plate ( 4 ′, 4 ″),

wherein the housing ( 18 ′, 18 ″) of the control unit ( 16 ) arranged directly beneath the installation plate ( 4 ′, 4 ″) has an intermediate flange ( 48 , 70 ) which is screw-connected to the main part of the housing ( 18 ′, 18 ″) and which has the first annular collar ( 50 , 72 ), and wherein the intermediate flange ( 48 , 70 ) is, with the first annular collar ( 50 , 72 ), guided in a passage opening ( 40 , 40 ′) of the installation plate ( 4 ′, 4 ″) coaxially rotatably about a vertical central axis ( 32 ), and is connectable in a non-positively locking fashion to the installation plate ( 4 ′, 4 ″) via a releasable clamping connection ( 62 , 76 , 77 );

wherein the clamping connection ( 62 ) is formed by an outer annular groove ( 52 ) with a radially inward groove bottom and an upper side wall in the first annular collar ( 50 ) of the intermediate flange ( 48 ) and by two clamping plates ( 64 , 64 ′) arranged at the first annular collar ( 50 ) diagonally opposite from each other on the installation plate ( 4 ′) and engaging the annular groove ( 52 ),

wherein each of the clamping plates ( 64 , 64 ′) is screw-connected to the installation plate ( 4 ′) and is angled upward in cross section in a radially inward direction with an axially elevated inner edge ( 68 ) and a circular-arc-shaped inner end wall ( 66 ), wherein, in an installed state, the circular-arc-shaped inner end wall of each of the clamping plates ( 64 , 64 ′) bears ( 66 ) against the groove bottom ( 54 ) of the annular groove ( 52 ) and the axially elevated inner edge ( 68 ) bears against the upper side wall ( 56 ) of the annular groove ( 52 ).

2. The foot brake valve ( 2 ′) as claimed in claim 1 , wherein the inner end wall ( 66 ) of the clamping plates ( 64 , 64 ′) and the groove bottom ( 54 ) of the annular groove ( 52 ) of the first annular collar ( 50 ) are both smooth.

3. The foot brake valve ( 2 ′) as claimed in claim 1 , wherein the inner end wall ( 66 ) of the clamping plates ( 64 , 64 ′) and the groove bottom ( 54 ) of the annular groove ( 52 ) of the first annular collar ( 50 ) are both circumferentially toothed.

4. The foot brake valve ( 2 ′) as claimed in claim 3 , wherein both the inner end wall ( 66 ) of the clamping plates ( 64 , 64 ′) and the groove bottom ( 54 ) of the annular groove ( 52 ) of the first annular collar ( 50 ) have a circumferential serration.

5. A foot brake valve ( 2 ″) of a pneumatic brake system in a motor vehicle, the foot brake valve comprising:

an installation plate ( 4 ′, 4 ″), on which a brake pedal ( 14 ) is pivotably mounted and to which a housing ( 18 ′, 18 ″; 28 ) of a control unit ( 16 , 26 ) is fastened,

a spring-loaded plunger piston ( 36 ) in an actuating contact with the brake pedal ( 14 ) and guided axially movably in a first annular collar ( 50 , 72 ), which projects upward out of the installation plate ( 4 ′, 4 ″),

wherein the housing ( 18 ′, 18 ″) of the control unit ( 16 ) arranged directly beneath the installation plate ( 4 ′, 4 ″) has an intermediate flange ( 48 , 70 ) which is screw-connected to the main part of the housing ( 18 ′, 18 ″) and which has the first annular collar ( 50 , 72 ), and wherein the intermediate flange ( 48 , 70 ) is, with the first annular collar ( 50 , 72 ), guided in a passage opening ( 40 , 40 ′) of the installation plate ( 4 ′, 4 ″) coaxially rotatably about a vertical central axis ( 32 ), and is connectable in a non-positively locking fashion to the installation plate ( 4 ′, 4 ″) via a releasable clamping connection ( 62 , 76 , 77 );

wherein the clamping connection ( 76 ) is formed by a clamping screw connection ( 78 ) which comprises the following:

a second annular collar ( 42 ) on the top side of the installation plate ( 4 ″) with a cylindrical inner wall ( 46 ),

a clamping ring ( 80 ) with a cylindrical outer wall ( 82 ) and with a conical, axially downwardly narrowing inner wall ( 84 ), and a conical outer wall ( 74 ) on the first annular collar ( 72 ) of the intermediate flange ( 70 ), and

a sleeve nut ( 86 ) with an internal thread ( 88 ), wherein the clamping ring ( 80 ) is, in an installed state, arranged between the cylindrical inner wall ( 46 ) of the second annular collar ( 42 ) of the installation plate ( 4 ″) and the conical outer wall ( 74 ) of the first annular collar ( 72 ) of the intermediate flange ( 70 ), and wherein radial bracing of the first and second annular collars ( 42 , 72 ) is caused by the clamping ring ( 80 ) as a result of the screw connection of the sleeve nut ( 86 ) to the second annular collar ( 42 ) of the installation plate ( 4 ″).

6. The foot brake valve ( 2 ″) as claimed in claim 5 , wherein the cylindrical inner wall ( 46 ) of the second annular collar ( 42 ) of the installation plate ( 4 ″), the conical inner wall ( 84 ) and the cylindrical outer wall ( 82 ) of the clamping ring ( 80 ), and the conical outer wall ( 74 ) of the first annular collar ( 72 ) of the intermediate flange ( 70 ) are each of smooth form.

7. The foot brake valve ( 2 ″) as claimed in claim 6 , wherein the clamping ring ( 80 ) is axially slotted or is composed of multiple ring segments.

8. The foot brake valve ( 2 ″) as claimed in claim 5 , wherein the cylindrical inner wall ( 46 ) of the second annular collar ( 42 ) of the installation plate ( 4 ″), the conical inner wall ( 84 ) and the cylindrical outer wall ( 82 ) of the clamping ring ( 80 ) and the conical outer wall ( 74 ) of the first annular collar ( 72 ) of the intermediate flange ( 70 ) are each of circumferentially toothed form.

9. The foot brake valve ( 2 ″) as claimed in claim 8 , wherein the cylindrical inner wall ( 46 ) of the second annular collar ( 42 ) of the installation plate ( 4 ″), the conical inner wall ( 84 ) and the cylindrical outer wall ( 82 ) of the clamping ring ( 80 ) and the conical outer wall ( 74 ) of the first annular collar ( 72 ) of the intermediate flange ( 70 ) are each provided with a circumferential serration.

10. The foot brake valve ( 2 ″) as claimed in claim 9 , wherein the clamping ring ( 80 ) is axially slotted or is composed of multiple ring segments.

11. The foot brake valve ( 2 ″) as claimed in claim 8 , wherein the clamping ring ( 80 ) is axially slotted or is composed of multiple ring segments.

12. The foot brake valve ( 2 ″) as claimed in claim 5 , wherein the clamping ring ( 80 ) is axially slotted or is composed of multiple ring segments.

13. A foot brake valve ( 2 ′″) of a pneumatic brake system in a motor vehicle, the foot brake valve comprising:

an installation plate ( 4 ′, 4 ″), on which a brake pedal ( 14 ) is pivotably mounted and to which a housing ( 18 ′, 18 ″; 28 ) of a control unit ( 16 , 26 ) is fastened,

a spring-loaded plunger piston ( 36 ) in an actuating contact with the brake pedal ( 14 ) and guided axially movably in a first annular collar ( 50 , 72 ), which projects upward out of the installation plate ( 4 ′, 4 ″),

wherein the housing ( 18 ′, 18 ″) of the control unit ( 16 ) arranged directly beneath the installation plate ( 4 ′, 4 ″) has an intermediate flange ( 48 , 70 ) which is screw-connected to the main part of the housing ( 18 ′, 18 ″) and which has the first annular collar ( 50 , 72 ), and wherein the intermediate flange ( 48 , 70 ) is, with the first annular collar ( 50 , 72 ), guided in a passage opening ( 40 , 40 ′) of the installation plate ( 4 ′, 4 ″) coaxially rotatably about a vertical central axis ( 32 ), and is connectable in a non-positively locking fashion to the installation plate ( 4 ′, 4 ″) via a releasable clamping connection ( 62 , 76 , 77 );

wherein the clamping connection ( 77 ) is formed by a clamping screw connection ( 79 ) which comprises the following:

a second annular collar ( 42 ) on a top side of the installation plate ( 4 ″) with an external thread ( 44 ) and with a conical, axially downwardly narrowing inner wall ( 46 ),

a clamping ring ( 81 ) with a conical, axially downwardly narrowing outer wall ( 82 ) and with a cylindrical inner wall ( 84 ),

a cylindrical outer wall ( 74 ) on the first annular collar ( 72 ) of the intermediate flange ( 70 ), and

a sleeve nut ( 86 ) with an internal thread ( 88 ),

an external thread ( 90 ) on the first annular collar ( 72 ) of the intermediate flange ( 70 ), and

an internal thread ( 92 ) on the inner wall ( 84 ) of the clamping ring ( 81 ),

wherein the internal thread ( 92 ) of the clamping ring ( 81 ) is, in an installed state, screw-connected to the external thread ( 90 ) of the intermediate flange ( 70 ), and wherein radial bracing of the first and second annular collars ( 42 , 72 ) is caused by the clamping ring ( 80 ) as a result of a screw connection of the sleeve nut ( 86 ) to the second annular collar ( 42 ) of the installation plate ( 4 ″).

14. The foot brake valve ( 2 ′″) as claimed in claim 13 , wherein both the inner wall ( 46 ) of the second annular collar ( 42 ) on the installation plate ( 4 ″) and the outer wall ( 82 ) of the clamping ring ( 81 ) are smooth.

15. The foot brake valve ( 2 ′″) as claimed in claim 14 , wherein the clamping ring ( 81 ) is axially slotted or is composed of multiple ring segments.

16. The foot brake valve ( 2 ′″) as claimed in claim 13 , wherein the clamping ring ( 81 ) is axially slotted or is composed of multiple ring segments.