JPS6228934U - - Google Patents

Description

[Brief explanation of the drawing]

The figure shows a cross-sectional view of a disc brake including an actuator according to the first feature of the present invention. 13...Body, 14...Cylinder hole, 15...
... End wall, 16 ... Piston, 17 ... Intake port, 20 ... Adjustment mechanism, 23 ... Nut member,
22...Screw member, 85...Seal.

Claims (1)

[Claims for Utility Model Registration] (1) A brake actuator capable of moving at least one friction member into engagement with a rotatable element, the actuator comprising one cylinder hole, one of the cylinder holes, an end wall closing an end and an actuator member slidingly sealed within the cylinder bore and closing the other end of the cylinder to define a fluid-tight working chamber, the working chamber having an inlet port; an actuator body defining an actuator member adapted to introduce pressurized fluid into the actuation chamber to displace the actuator member from the end wall and apply a braking force; an adjustment mechanism acting between the actuator member and the end wall, the adjustment mechanism including an adjustable abutment device for limiting the return movement of the actuator member; A jack with parts, the adjusting part including one extendable jack adapted to be moved axially in one direction relative to each other to extend the jack and thereby compensate for wear of the friction member. an adjustment mechanism and limited free movement of the actuator member from a rest position under the influence of fluid pressure in the actuating chamber before the jack begins to extend to change the rest position of the actuator member; and an adjustable setting device operable to change the limited amount of free movement after final assembly of the actuator, wherein one of the adjustment parts and the setting An actuator, wherein the devices form an actuator subassembly held together by a retainer device. (2) Utility Model Registration The actuator according to claim 1, wherein the retainer device includes a cage member and an end plate assembled to each other. (3) Utility model registration In the actuator according to claim 2, the extendable jack includes first and second adjustment parts that are threadedly engaged, and the first part is attached to the actuator body. and a second part is connected to the actuator member, the connection being such that when fluid is introduced into the actuation chamber and the actuator member moves, relative movement of the adjustment part is induced. A clutching device is provided between one of the adjusting parts and its connecting part, and when the actuator member moves beyond a predetermined limit upon introduction of fluid into the working chamber, the clutching device is disposed. are separated so that one adjustment part rotates relative to the other adjustment part to extend the jack, and the relative rotational movement of the adjustment part during return movement of said adjustment part is directed to said crunching device. the first adjustment component being rotatable relative to the actuator body in a manner such that axial movement of the first adjustment component is restricted by a cage member of the retainer; An actuator characterized in that the actuator is arranged so that (4) Utility Model Registration In the actuator according to claim 2 or 3, the screws of the first and second adjustment parts are arranged to allow the screws of the first and second adjustment parts to adjust the adjustment part to the predetermined limit without disengaging the clutch device. a gap between the screws for free movement of the second adjustment part in the axial direction of the first adjustment part, the adjustable setting device having a screw arrangement accessible from the outside of the actuator body; and
The screw device is in contact with and coaxial with the first adjustment part to set the axial position of the first adjustment part with respect to the second adjustment part within the tooth gap of the second adjustment part. an actuator, wherein the screw device is held in juxtaposed relationship with the first adjustment component by an end plate of the retainer. (5) In the actuator according to any one of claims 2 to 4, the cage member has one outward flange portion, and the flange allows the cage member to An actuator characterized in that the member is attached to an actuator body. (6) Utility model registration In the actuator according to any one of claims 1 to 5, the actuator member is movable by a mechanical device to apply a braking force,
An actuator, characterized in that the movement for braking of the mechanical device is transmitted via the adjustment mechanism in such a way that the actuator member moves away from the end wall. (7) In the actuator according to item 6 derived from claim 5 of the utility model registration, a return spring acts between the actuator body and the outward flange portion of the cage member to actuate the cage member. An actuator that is pressed against an end wall of a Yueta body. (8) Utility model registration In the actuator according to claim 7, the cage member brings the return spring into contact with the end plate prior to assembling the retainer device into the actuator body. an actuator comprising at least one radially extending finger for retaining the actuator in the actuator; (9) Utility model registration In the actuator according to any one of claims 2 to 8, the end plate is configured such that the cage member and the end plate rotate with respect to the actuator body. an actuator comprising a tab that engages within a recess in the actuator body to prevent (10) In the actuator according to any one of claims 1 to 9 of the claims for utility model registration, a readjustment mechanism is provided, whereby one of the adjustment parts is adjusted so as to retract the jack. An actuator characterized in that it is axially movable with respect to the other adjustment part. (11) 11 In the actuator according to item 10 derived from claim 3 of the utility model registration, the readjustment mechanism includes a strut that can be rotated from outside the actuator body, The strut is connected to the first adjustment part by a unidirectional drive, which allows the first adjustment part to rotate against the clutch arrangement to retract the jack. An actuator characterized by: (12) 12 Utility Model Registration The actuator according to claim 11, wherein the strut is connected to the first adjustment part by a ratchet drive. (13) Utility model registration The actuator according to claim 12, wherein the strut is provided with wedge-shaped ratchet teeth provided on an end surface, each tooth being provided on an end of the first adjustment part. An actuator characterized in that a spring device is provided for cooperating with each provided inclined cavity and for biasing said strut into engagement with said first adjustment part. (14) Scope of utility model registration claims Paragraphs 11 to 1
Actuator according to any one of the preceding clauses, characterized in that the strut is mounted in the axial direction of the adjustable setting device.