Valve unit for modulating the pressure in a pneumatic brake system

Patent metadata

Field	Value
Publication number	US-10214191-B2
Application number	US-201515506029-A
Country	US
Kind code	B2
Filing date	Aug 6, 2015
Priority date	Aug 27, 2014
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

A valve unit (1, 1′) for modulating the pressure in a pneumatic brake system, has a brake pressure inlet (3), a brake pressure outlet (4) and a venting outlet (5), a pneumatically controllable main valve (6, 7) and a pilot valve (8, 9), embodied as a solenoid valve and assigned to the main valve (6, 7), which are arranged in a valve housing (2, 2′) subdivided by a plane of division (10), into a main housing (11, 11′) and a housing cover (12). For fixing the housing cover (12) on the main housing (11, 11′) a bracket element (62.1) is fixed to the main housing (11, 11′) and bears with a largely planar pressure plate (63) generating an elastic prestressing force on a planar outside wall (64) of the housing cover (12) oriented parallel to the plane of division (10) of the valve housing (2, 2′).

First claim

The invention claimed is:

1. A valve unit ( 1 , 1 ′) for modulating pressure in a pneumatic brake system, comprising:
a brake pressure inlet ( 3 ),
a brake pressure outlet ( 4 ),
a venting outlet ( 5 ),
a main valve ( 6 , 7 ), which is pneumatically controllable,
a pilot valve ( 8 , 9 ), embodied as a solenoid valve and assigned to the main valve ( 6 , 7 ), and
a valve housing ( 2 , 2 ′) accommodating the main valve and the pilot valve, the valve housing being subdivided by a plane of division ( 10 ), extending horizontally in an installed position, into a main housing ( 11 , 11 ′) and a housing cover ( 12 ),
wherein the brake pressure inlet ( 3 ), the brake pressure outlet ( 4 ) and the venting outlet ( 5 ) are arranged in the main housing ( 11 ), the main valve ( 6 , 7 ) is arranged in the main housing ( 11 ) between the brake pressure inlet ( 3 ) and the brake pressure outlet ( 4 ) with an actuation axis ( 14 , 15 ) oriented perpendicular to the plane of division ( 10 ), the pilot valve ( 8 , 9 ) is arranged in the housing cover ( 12 ), and at least one control chamber ( 51 , 52 ) of the main valve ( 6 , 7 ) is delimited by an inside wall ( 50 ) of the housing cover ( 12 ) facing the plane of division ( 10 ),
wherein a bracket element ( 62 . 1 , 62 . 2 , 62 . 3 ) affixes the housing cover ( 12 ) on the main housing ( 11 , 11 ′), which in an assembled state is fixed to the main housing ( 11 , 11 ′), and which bears with a pressure plate ( 63 ) generating an elastic prestressing force on a planar outside wall ( 64 ) of the housing cover ( 12 ) oriented parallel to the plane of division ( 10 ) of the valve housing ( 2 , 2 ′),
wherein the bracket element ( 62 . 1 , 62 . 2 ) includes two articulated arms ( 65 , 66 ) on opposite sides of the valve housing ( 2 , 2 ′) in the longitudinal direction ( 13 ), the articulated arms laterally enclosing the housing cover ( 12 ) and the main housing ( 11 ) and being pivotally fixed to the main housing ( 12 ) via an axis of articulation ( 69 ) engaging in an articulation hole ( 67 , 68 ), and wherein in a longitudinal direction ( 13 ) opposite the articulated arms ( 65 , 66 ), the bracket element ( 62 . 1 , 62 . 2 ) is rigidly fixed to the main housing ( 11 ).

2. The valve unit as claimed in claim 1 , wherein the bracket element ( 62 . 1 ), in a longitudinal direction ( 13 ) opposite the articulated arms ( 65 , 66 ), includes a fixing clip ( 70 ), which is oriented parallel to the pressure plate ( 63 ) and has at least one hole ( 71 ), which serves for bolting the bracket element ( 62 . 1 ) to the main housing ( 11 ) by a bolt ( 72 ) and generating an elastic prestressing force.

3. The valve unit as claimed in claim 2 , wherein the main housing ( 11 ), in a longitudinal direction ( 13 ) opposite the axis of articulation ( 69 ), comprises a columnar projection ( 73 ), which extends vertically above the plane of division ( 10 ) and includes at least one threaded hole ( 74 ) for bolted fastening of the fixing clip ( 70 ).

4. The valve unit as claimed in claim 1 , wherein the bracket element ( 62 . 2 ), in a longitudinal direction ( 13 ) opposite the articulated arms ( 65 , 66 ), includes a fixing clip ( 76 ), which is bent transversely to the pressure plate ( 63 ) and which comprises a locking hook ( 77 ), directed inwards for latching the bracket element ( 62 . 2 ) to the main housing ( 11 ) through engagement in an opposing latching recess ( 79 ) and by generating an elastic prestressing force.

5. The valve unit as claimed in claim 4 , wherein the main housing ( 11 ), in a longitudinal direction ( 13 ) opposite the axis of articulation ( 69 ), comprises a planar projection ( 78 ), which extends perpendicularly beyond the plane of division ( 10 ) and includes—the latching recess ( 79 ) for latching of the fixing clip ( 76 ).

6. The valve unit as claimed in claim 1 , wherein the bracket element ( 62 . 1 , 62 . 2 ) is monolithically manufactured with the pressure plate ( 63 ), the articulated arms ( 65 , 66 ), and the fixing clip ( 70 , 76 ) from sheet-metal.

7. The valve unit as claimed in claim 1 , wherein the articulation holes ( 67 , 68 ) in the articulated arms ( 65 , 66 ) each—include a cylindrical passage ( 80 , 81 ).

8. The valve unit as claimed in claim 1 , wherein the pressure plate ( 63 ) of the bracket element ( 62 . 1 ) is arched ( 105 ) in the direction of the outside wall ( 64 ) of the housing cover ( 12 ) in order to afford a central introduction of an elastic prestressing force.

9. The valve unit as claimed in claim 1 , wherein the pressure plate ( 63 ) of the bracket element ( 62 . 1 ) comprises at least one convexity ( 106 , 107 ) directed towards the outside wall ( 64 ) of the housing cover ( 12 ) for localized introduction of an elastic prestressing force.

10. The valve unit as claimed in claim 9 , wherein the convexity ( 106 , 107 ) is positioned and formed in the pressure plate ( 63 ) in such a way that in the assembled state of the bracket element ( 62 . 1 ), the convexity extends across a control chamber ( 51 , 52 ) of the main valve ( 6 , 7 ), the control chamber ( 51 , 52 ) being delimited by the inside wall ( 50 ) of the housing cover ( 12 ).

11. A valve unit ( 1 , 1 ′) for modulating pressure in a pneumatic brake system, comprising:
a brake pressure inlet ( 3 ),
a brake pressure outlet ( 4 ),
a venting outlet ( 5 ),
a main valve ( 6 , 7 ), which is pneumatically controllable,
a pilot valve ( 8 , 9 ), embodied as a solenoid valve and assigned to the main valve ( 6 , 7 ), and
a valve housing ( 2 , 2 ′) accommodating the main valve and the pilot valve, the valve housing being subdivided by a plane of division ( 10 ), extending horizontally in an installed position, into a main housing ( 11 , 11 ′) and a housing cover ( 12 ),
wherein the brake pressure inlet ( 3 ), the brake pressure outlet ( 4 ) and the venting outlet ( 5 ) are arranged in the main housing ( 11 ), the main valve ( 6 , 7 ) is arranged in the main housing ( 11 ) between the brake pressure inlet ( 3 ) and the brake pressure outlet ( 4 ) with an actuation axis ( 14 , 15 ) oriented perpendicular to the plane of division ( 10 ), the pilot valve ( 8 , 9 ) is arranged in the housing cover ( 12 ), and at least one control chamber ( 51 , 52 ) of the main valve ( 6 , 7 ) is delimited by an inside wall ( 50 ) of the housing cover ( 12 ) facing the plane of division ( 10 ),
wherein a bracket element ( 62 . 1 , 62 . 2 , 62 . 3 ) affixes the housing cover ( 12 ) on the main housing ( 11 , 11 ′), which in an assembled state is fixed to the main housing ( 11 , 11 ′), and which bears with a pressure plate ( 63 ) generating an elastic prestressing force on a planar outside wall ( 64 ) of the housing cover ( 12 ) oriented parallel to the plane of division ( 10 ) of the valve housing ( 2 , 2 ′),
wherein the brake pressure inlet ( 3 ) and the brake pressure outlet ( 4 ) are horizontally oriented in the main housing ( 11 ), axially opposite in a longitudinal direction ( 13 ) and with the venting outlet ( 5 ) directed vertically downwards between the brake pressure inlet ( 3 ) and the brake pressure outlet ( 4 ).

12. The valve unit as claimed in claim 11 , wherein the bracket element ( 62 . 3 ) in the longitudinal direction ( 13 ) of the valve housing ( 2 ′) has two fixing arms ( 82 - 85 ) on each side, which laterally enclose the housing cover ( 12 ) and the main housing ( 11 ′) and with inwardly elbowed bends ( 86 - 89 ), which grip around a planar base wall ( 90 ) of the main housing ( 11 ′) remote from the plane of division ( 10 ), and at the end engage in assigned openings ( 92 - 95 ) in a planar base plate ( 91 ), w

Assignees

• Wabco Gmbh

Inventors

• Dreyer Werner
• Runge Karsten
• Teichmann Andreas

Classifications

• B60T8/362

  in pneumatic systems (B60T8/3655, B60T8/3675 and B60T8/369 take precedence) · CPC title

• B60T8/3605 Primary

  wherein the pilot valve is mounted in a circuit controlling the working fluid system · CPC title

• B60T8/3675

  integrated in modulator units · CPC title

• B60T8/342 Primary

  Pneumatic systems · CPC title