A brake actuator for a railway vehicle brake system has a thrust sleeve (22) configured to provide braking force to the brake system, and a slide (30A) axially moveable in the thrust sleeve (22) between a release position and a locking position. The actuator (1) further has a piston (24) biased by spring means (29) and linked to an anchoring member (36). A plurality of balls (33) are disposed in respective openings (32) of the sleeve (22) between the slide (30) and the anchoring member (36). In the locking position, the balls (33) are configured to move under the action of a profiled surface of the slide (30A) to axially couple the anchoring member (36) with the sleeve (22). In the release position, the balls (33) are configured to axially uncouple the anchoring member (36) from the sleeve (22). The profiled slide surface has a locking groove configured to engagingly receive the balls (33) when the slide (30A) is in the locking position.
A brake actuator for brakingly engaging a brake block or pad (9) with a rotating part of a vehicle has spring means (24) creating a linear brake force. An eccentric mechanism (21, 23, 25) is arranged in a brake force transmitting chain from the spring means (24) to the brake block or pad (9), and there is a motor (2) for controlling the angular position of an eccentric (25) in this mechanism and thus the brake force transmitted from the spring means (24).
F16D 55/22 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
F16D 65/28 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged apart from the brake
A parking brake arrangement for a brake unit - also having a service brake actuator - has in a housing (4) a clock spring (10) for exercising a rotary motion at will on a parking brake gear wheel (8) in drive connection with a device (5-7) for delivering brake force from the brake unit (1). The arrangement has two axially movable control sleeves (15, 16) in drive connection with the clock spring (10). The control sleeves form clutches (8 ', 15 and 12, 16, respectively) with the parking brake gear wheel (8) and the housing (4), respectively. There are means (13, 18-21) for controlling the axial movements of the two control sleeves and the engagement of the two clutches in such a way that either one of them is always in engagement.
B60T 13/04 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with mechanical assistance or drive by spring or weight
B60T 13/74 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
F16D 55/226 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
A parking brake arrangement for a brake unit - also having a service brake actuator - has in a housing (4) a clock spring (10) for exercising a rotary motion at will on a parking brake gear wheel (8) in drive connection with a device (5-7) for delivering brake force from the brake unit (1). The arrangement has two axially movable control sleeves (15, 16) in drive connection with the clock spring (10). The control sleeves form clutches (8 ', 15 and 12, 16, respectively) with the parking brake gear wheel (8) and the housing (4), respectively. There are means (13, 18-21) for controlling the axial movements of the two control sleeves and the engagement of the two clutches in such a way that either one of them is always in engagement.
B60T 13/04 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with mechanical assistance or drive by spring or weight
B60T 13/74 - Transmitting braking action from initiating means to ultimate brake actuator with power assistance or driveBrake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
F16D 55/226 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
5.
A PARKING BRAKE ARRANGEMENT FOR A RAIL VEHICLE BOGIE BRAKE
A parking brake arrangement for a rail vehicle bogie brake comprises at least one hand wheel (7) at the side of the bogie (1) for manually providing a parking brake force, a cardan shaft (8) for transmitting a rotational movement from the hand wheel (7) to a gear box (9) mounted on a brake beam (5A). The brake beam has at least one brake actuator (6). A transmitting means for transmitting the parking brake force to the actuator is an operating shaft (13) having a spindle-and-nut arrangement for transforming the rotational movement from the gear box (9) to a translational movement to a parking brake lever (12) of the brake actuator (6), the lever (12) being connected to the outgoing push rod (6´) of the actuator.
A bogie brake assembly comprises two brake beams (1, 2) to be suspended from a rail vehicle bogie and being provided with brake block heads (3) at their respective ends, two knee levers (7) pivotally connected to the first brake beam (1), a pushing brake unit (6) arranged between a respective first arm of each of the two knee levers, and push rods (8) being connected to a respective second arm of each of the two knee levers and to the second brake beam (2) in the vicinity of their brake block heads (3).In this assembly each push rod (8) is pivotally connected to the second brake beam (2) by means of a vertical bolt (18) in a push rod end ear (8´). Spring means (19) between the second brake beam (2) and each push rod (8) are arranged to bias the push rod into a neutral position substantially perpendicular to the second brake beam.
B61H 13/24 - Transmitting mechanisms for cars with two axles or bogies with two axles and braking cylinder(s) for each bogie, the mechanisms at each side being interconnected
F16D 65/22 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart
7.
A RAIL VEHICLE BRAKE ACTUATOR WITH A BRAKE BLOCK HOLDER
A rail vehicle brake actuator (1) has a brake block holder (4) suspended therefrom so as to be laterally movable during braking. Brake block hangers (5), which are rigid, are attached at their upper ends to brackets (2) on the actuator (1) by means of a joint (15) allowing relative laterally pivotable and rotatable movements and at their lower ends to the brake block holder. The lower ends of the brake block hangers (5) are laterally pivotally attached to a movable brake block holder axle (16) extending through a transverse bore in the brake block holder (4), and spring means (21) are arranged between the respective brake block hangers and the brake block holder.
A rail vehicle brake actuator (1) has a brake block holder (4) suspended therefrom so as to be laterally movable during braking. Brake block hangers (5), which are rigid, are attached at their upper ends to brackets (2) on the actuator (1) by means of a joint (15) allowing relative laterally pivotable and rotatable movements and at their lower ends to the brake block holder. The lower ends of the brake block hangers (5) are laterally pivotally attached to a movable brake block holder axle (16) extending through a transverse bore in the brake block holder (4), and spring means (21) are arranged between the respective brake block hangers and the brake block holder.
A parking brake indicator system for a rail vehicle is provided. The parking brake indicator system comprises a movably arranged parking brake transmitter for applying a braking force towards the brake system of a rail vehicle, the parking brake transmitter having a resilient member provided therein, and a brake indicator arrangement connected to the parking brake transmitter, wherein the brake indicator arrangement is configured to indicate the actual applied braking force of the parking brake transmitter towards the braking system. A parking brake indicator device is also provided.
In a rail vehicle brake unit concurrent service brake application by compressed air and parking brake application by means of a mechanical parking brake arrangement (3-7) connected to the brake unit shall be prevented. A valve member (10) in the brake unit is movable under the mechanical control of a member (9) of the parking brake arrangement (3-7) between a service brake position for allowing compressed air to enter the brake unit and a parking brake position for venting the compressed air from the brake unit out to the atmosphere.
In a rail vehicle brake unit, a brake force transmitting spindle (4) is part of a slack adjuster mechanism in the brake unit comprising an adjuster tube (2) coaxial with the spindle (4). For decreasing the risk for bending of the spindle (4) extending out of the brake unit, it is provided with spindle sleeve (7), which extends along the spindle, has an inner diameter slightly exceeding the outer diameter of the spindle and is guidingly connected to the adjuster tube (2).
A rail vehicle brake slack adjuster comprises an axially movable, sleeve-shaped driver element (22) adapted to receive an axially applied braking force in a brake application direction, a spindle (16) axially movable within the driver element, an adjuster nut (34) in non- self-locking thread engagement with the spindle, clutch means between the driver element and the adjuster nut, and a barrel spring (30) biasing the spindle in the brake application direction. The adjuster has a combination of a first clutch (36) comprising a clutch surface on the driver element (22) directed in the brake application direction and a corresponding clutch surface on the adjuster nut (34) and a second clutch (38) comprising a clutch surface on the driver element (22) directed in the direction opposite to the brake application direction and a corresponding clutch surface on an adjuster nut sleeve (37). The adjuster nut sleeve (37) is axially movable on the adjuster nut (34).
A force measuring device for measuring forces at disc braking of a rail vehicle by means of a brake pad (2) attached to a brake pad holder (1) and brakingly engaging a rotating brake disc comprises an insert (5), which contains force measuring means (9, 10), is to be arranged between the brake pad holder (1) and the brake pad (2) and has similar attachment means (6, 7) as the brake pad holder and the brake pad.
A parking brake arrangement in a rail vehicle brake actuator (1, 2) comprises a parking brake shaft (7) rotatably journaled in the actuator and an arm arrangement (9) connected to the shaft and having at its end an engagement member (11), which is intended for engagement with the upper side of a piston (3) of the brake actuator. The upper side of the piston (3) is provided with means defining a cam curve (3') in the form of a gradually elevating slope.
A disc brake caliper for a rail vehicle comprises brake pad holders (4) suspended - at either side of a brake disc to be braked - for movements only in a plane perpendicular to a substantially horizontal center- line of the caliper. Members (6, 8, 9, 10) of the caliper for transmitting movements from a brake unit (11) to the brake pad holders (4) are suspended from the vehicle via only elements of rubber-elastic material in an elastic joint (7) allowing movements to a certain extent of said members in all directions. The elastic joint (7) comprises at least one plate-shaped rubber-elastic element, which is substantially horizontally mounted in compression between a part (1) for attachment to the vehicle and one (6) of said members (6, 8, 9, 10) of the caliper.
F16D 55/224 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
B61H 5/00 - Applications or arrangements of brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
A weighing valve device comprises a housing (101) with a cover (104) , an axially movable piston (102) in a bore in the housing (101) and an enclosed body (103) of plastically deformable material in the piston (102). A differential piston (105-107) with a smaller diameter piston part (106) is in contact with the body (103) and with a larger diameter piston part in the form of a diaphragm (105) clamped between the housing (101) and the cover (104) and backed by a disc (107). A valve with an axially movable, spring-biassed valve member (110) is in contact with the diaphragm. A compressed air pressure acting on the diaphragm (105) and governed by the valve is adapted to counteract a mechanical force on the piston (102). The smaller diameter part (106) of the differential piston (105-107) rests against the disc (107) at its center. The diaphragm (105) and the disc (107) are provided at their centres with a through passage (111) for venting of compressed-air. The valve member (110) is arranged over the through passage (111). The smaller diameter piston part (106) is guided by a guide sleeve (108') in a guide block (108) above the enclosed body (103).
B60T 8/18 - Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
A brake unit, preferably for a rail vehicle, comprises in a housing (10): a piston (11), and a push rod 5 in the form of a spindle (16) in an axial slack adjuster (24-46). The axial directions of the piston and the push rod are substantially perpendicular to each other, and means are provided for force transmission between these parts. Said force transmitting means comprise wedge 10 elements (15) at the underside of the piston (11) cooperating with a driver element (22) coaxial with and force-transmittingly connected to the spindle (16). The driver element (22) is supported with rolling friction by the housing (10) for movements in the axial direction of 15 the spindle (16), and the spindle (16) is axially guided by the housing (10) at its forward end.
A brake unit, preferably for a rail vehicle, comprises in a housing (10): a piston (11), and a push rod 5 in the form of a spindle (16) in an axial slack adjuster (24-46). The axial directions of the piston and the push rod are substantially perpendicular to each other, and means are provided for force transmission between these parts. Said force transmitting means comprise wedge 10 elements (15) at the underside of the piston (11) cooperating with a driver element (22) coaxial with and force-transmittingly connected to the spindle (16). The driver element (22) is supported with rolling friction by the housing (10) for movements in the axial direction of 15 the spindle (16), and the spindle (16) is axially guided by the housing (10) at its forward end.
patents
