Adjustable damping valve device for a vibration damper

Abstract

Adjustable damping valve device for a vibration damper, wherein the damping valve device has a pre-stage valve for controlling a main stage valve, wherein the pre-stage valve has a flow connection to a piston rod-side working chamber and a flow connection to a piston rod-remote working chamber of the vibration damper, wherein a check valve arrangement is used to rectify control volume flows from the working chambers to the pre-stage valve, wherein the check valve arrangement is designed on a multi-part main stage valve body of the main stage valve, wherein the main stage valve body has a valve base body,which has on an outer partial circle at least one first check valve channel in combination with a first check valve disc for the control volume flow of a first of the two working chambers and on an inner partial circle at least one second check valve channel with a second check valve disc to a second of the two working chambers, wherein a cover as a component of the main stage valve body spatially separates the check valve with the second check valve disc in the function of a check valve housing on the outflow side from a control chamber of the main stage valve body.

Claims

[1] Adjustable damping valve device (1) for a vibration damper (3), wherein the damping valve device (1) has a pre-stage valve (19) for controlling a main stage valve (23), wherein the pre-stage valve (19) has a flow connection to a piston rod-side working chamber (25; 27) of the vibration damper (3) and a flow connection to a piston rod-remote working chamber (25; 27), wherein a check valve arrangement (47; 57; 59; 61) is used to rectify control volume flows from the working chambers (25; 27) to the pre-stage valve (19), wherein the check valve arrangement (47; 57; 59; 61) is designed on a multi-part main stage valve body (37) of the main stage valve (23), characterized byin that the main stage valve body (37) has a valve base body (37G) which has, on an outer partial circle, at least one first check valve channel (47) in combination with a first check valve disc (57) for the control volume flow of a first of the two working chambers (25) and, on an inner partial circle, at least one second check valve channel (59) with a second check valve disc (61) to a second of the two working chambers (27), wherein a cover (37D) as a component of the main stage valve body (37) spatially separates the check valve with the second check valve disc (61) in the function of a check valve housing (62) on the outflow side from a control chamber (45) of the main stage valve body (37). [2] Damping valve device (1) according to claim 1, characterized bythat the cover (37D) has a stepped profile on the inside, wherein a shoulder of the stepped profile forms a lift-off limiting surface (63) for the second check valve disc (61). [3] Damping valve device (1) according to claim 1 or 2, characterized by that the cover (37D) has an outer surface as a guide surface (65) for the first check valve disc (57). [4] Damping valve device (1) according to at least one of claims 1 to 3, characterized by that the cover (37D) has at least a web-shaped stop surface (67) for the lifting movement of the first check valve surface (57). [5] Damping valve device (1) according to at least one of claims 1 to 4, characterized by that the valve base body (37G) has a guide ring (37F) which radially supports the main stage valve body (37) within the valve housing (5). [6] Damping valve device (1) according to at least one of claims 1 to 5, characterized bythat the main stage valve body (37) comprises a support bolt (37T) which is separate from the valve base body (37G) and has an axial channel (55) for connecting a control chamber (45) for the main stage valve body (37) to the pre-stage valve (19). [7] Damping valve device (1) according to claim 6, characterized by that the support bolt (37T) has a first radial connection (53) to the control chamber (45) and a second radial connection (69) in the check valve housing (62), wherein both radial connections (53; 69) open into the axial channel (55). [8] Damping valve device (1) according to claim 6 or 7, characterized by that the support bolt (37T) has an axial stop (79) for fixing the cover (37D). [9] Damping valve device (1) according to at least one of claims 1 to 8, characterized by that the valve base body (37G) has a sleeve extension (37H) for a valve seat ring (81).

Images