53results about "Mechanically actuated brakes" patented technology

A brake device (20) comprising a first device (22); a brake element (24) having a first frictional brake surface (74a, 74b) and an engageable structure (30); a second device (26) movable relative to the first device; a second frictional brake surface (76a, 76b); a force device (40) arranged to press the first frictional brake surface and the second frictional brake surface against each other with a pressing force (50); and an actuator (28) connected to the first device, the actuator comprising an engaging structure (52) movable between a disengaged position (78) not engaging the engageable structure, and an engaged position (54) engaging the engageable structure to brake relative motion (56) between the first device and the second device; wherein a dynamic friction coefficient between the first frictional brake surface and the second frictional brake surface is less than 0.3, such as less than 0.15, or less than 0.1; and wherein the pressing force is dimensioned with respect to the dynamic friction coefficient.

A brake assembly (200, 1100) for a work machine (100) includes a main brake housing (202), a disc stack (204), a brake housing (214) coupled with the main brake housing (202), and a piston (216) to compress the disc stack (204). At least one of the main brake housing (202) and the piston (216) define at least two spring pockets (205). The at least two spring pockets (205) are circumferentially spaced apart from each other. The brake assembly (200, 1100) also includes at least two spring assemblies (218) disposed between the main brake housing (202) and the piston (216). The at least two spring assemblies (218) are adapted to engage the piston (216) with the disc stack (204) to apply brakes via the brake assembly (200, 1100). Each spring pocket (205) of the at least two spring pockets (205) receives a corresponding spring assembly (218) of the at least two spring assemblies (218). Each of the at least two spring assemblies (218) includes at least one Belleville spring (232).

A method for electronic air gap control of an electrical motor vehicle brake system comprises electrical wheel brakes, wherein a resting position is adopted and maintained by supplying electric energy. Mechanical elements for adjusting the resting position can thus be dispensed with. Furthermore, an electrical motor vehicle brake system comprising electrical wheel brakes for carrying out such an electronic air gap control method is described.

A brake (3) for a motor comprises: a fixed-side engaging plate (30) fixed to a motor shaft (4); a movable-side engaging plate (20) coaxially opposed to the fixed-side engaging plate (30) along the direction of a center axis (3a); and a self-holding type solenoid (10) that moves, in the direction of the center axis, the movable-side engaging plate (20) to a halt cancelation position (20A) separated from the fixed-side engaging plate (30) and a halt position (20B) where engagement with the fixed-side engaging plate (30) occurs. When the motor is halted, the solenoid (10) is driven to move the movable-side engaging plate (20) from the halt cancelation position (20A) to the halt position (20B). The movable-side engaging plate (20) which has reached the halt position (20B) is mechanically engaged with the fixed-side engaging plate (30), and the motor shaft (4) is forcibly halted.

The present invention is entitled "Electric Brake." In some examples, the present invention provides a brake assembly including an actuator assembly configured to cause translation of a piston to compress a disc stack. The actuator assembly is configured to generate a first torque about a motor axis using a motor and a second torque from the first torque using a harmonic drive. The actuator assembly can include a gear set configured to cause a linear actuator to translate the piston using the second torque. In some examples, the actuator is configured to translate the piston along a compression axis that is different from the motor axis.

Proposed is a brake assembly for braking a shaft, wherein: the brake assembly comprises • - a magnet body (9), • - an armature disk (2) and • - an electrically energizable coil winding (8); the coil winding (8) is received in the magnet body (9); the armature disk (2) is rotationally coupled to the magnet body (9) and is movable in the axial direction; a permanent magnet (10) is arranged in a recess of the magnet body (9); bolts (3) which are mutually spaced in the circumferential direction project in the axial direction through respective recesses in the magnet body (9); and the bolts (3) are connected at one end to the armature disk (2) and at the other end to a magnetic return disk (4).

A brake for a motor includes a fixed-side engaging plate fixed to a motor shaft; a movable-side engaging plate coaxially opposed to the fixed-side engaging plate along the direction of a center axis; and a self-holding type solenoid that moves, in the direction of the center axis, the movable-side engaging plate to a halt cancelation position separated from the fixed-side engaging plate and a halt position where engagement with the fixed-side engaging plate occurs. When the motor is halted, the solenoid is driven to move the movable-side engaging plate from the halt cancelation position to the halt position. The movable-side engaging plate which has reached the halt position is mechanically engaged with the fixed-side engaging plate, and the motor shaft is forcibly halted.

A wet-type friction disc (1) includes lubrication grooves and a plurality of land portions defined by the lubrication grooves. The lubrication grooves have a plurality of circumferential groove portions extending in a circumferential direction and having a predetermined groove width in a radial direction, and a plurality of intersecting groove portions extending in a direction intersecting the circumferential direction. At least some of the circumferential groove portions have a circular arc shape such that an end portion in the circumferential direction is positioned adjacent to one of the land portions in the circumferential direction, and such that the groove width is entirely contained within a range in the radial direction spanned by the one land portion.

The invention relates to a vehicle braking system with a multi-disc brake or clutch (3) comprising an actuator (21) with a pair of discs consisting of a stationary disc (25) and a rotatable disc (27) coaxially thereto, as well as at least one intermediate ball-ramp unit (23), wherein, to engage a braking function, the rotatable disc (27) rotates from a zero-position position (0) in a braking direction (D). B ) rotates, causing the ball (29) to roll between opposing ball tracks (35) of the disc pair, with axial spreading of the disc pair to apply pressure to the multi-plate brake or clutch (3), and wherein, to engage the parking function, the rotatable disc (27) rotates from the zero-rotation position (0) in a direction relative to the braking direction (D). B ) opposite parking rotation direction (D P) rotates, whereby the opposing sliding ramps (38) of the disc pair can be brought into a sliding position, with axial spreading of the disc pair in order to apply contact pressure to the multi-plate brake or clutch (3). According to the invention, the ball-ramp unit (23) has a positioning aid (42) with which the ball (29), which is out of force transmission with the disc pair when the parking function is engaged, remains backlash-free in a predefined ball position.

The invention relates to a disc brake system having a brake disc group (1) with a plurality of inner discs (3) and a plurality of outer discs (2), either the plurality of inner discs or the plurality of outer discs being connected, in particular in a rotationally fixed manner, to a rotating shaft (31) for transmitting torque, one of the plurality of inner plates (3) or the plurality of outer plates (2) is connected to a fixed brake anchor (29), in particular in a rotationally fixed manner, and wherein at least the inner plates (3) or the outer plates (2) are at least partially embodied as friction plates, and wherein the other of the plurality of inner plates or the plurality of outer plates is connected to a fixed brake anchor (29), in particular in a rotationally fixed manner. One of the inner plates (3) and the outer plates (2) is designed at least partially as a mating plate, and the brake pad pack (1) has inner plates (3) and outer plates (2) which are arranged at least partially alternately and are mounted at least partially in an axially movable manner, and a brake actuator (19) is provided, the brake actuator is suitable for exerting an axial force on the brake pad group (1) in such a way that an operative connection between the shaft (31) and the brake anchor (29) can be established by means of an at least partial frictional engagement between a friction pad and a counter-pad in such a way that the shaft (31) can be braked.

A wing (3) for an aircraft (1) is disclosed, comprising a fixed wing (5), a foldable wingtip portion (9) mounted to the fixed wing (5) via a hinge (11) and rotatable between an extended position (15) and a folded position (17) about a hinge axis (13), and an actuation unit (19) for actuating the foldable wingtip portion (9) to move about the hinge axis (13). The object of the present invention is to provide a wing with a reduced complexity actuation unit, achieved by the wing (3) including a braking unit (21) for securing the foldable wingtip portion (9) in the folded position (17), and the braking unit (21) being formed separately from the actuation unit (19). This application also relates to an aircraft including the said wing.

The invention relates to a vehicle braking system with a multi-disc brake or clutch (3) comprising an actuator (21) with a pair of discs consisting of a stationary disc (25) and a rotatable disc (27) coaxially thereto, as well as at least one intermediate ball-ramp unit (23), wherein, to engage a braking function, the rotatable disc (27) rotates from a zero-position position (0) in a braking direction (D). B ) rotates, causing the ball (29) to roll between opposing ball tracks (35) of the disc pair, with axial spreading of the disc pair to apply pressure to the multi-plate brake or clutch (3), and wherein, to engage the parking function, the rotatable disc (27) rotates from the zero-rotation position (0) in a direction relative to the braking direction (D). B ) opposite parking rotation direction (D P) rotates, whereby the opposing sliding ramps (38) of the disc pair can be brought into a sliding position, with axial spreading of the disc pair in order to apply contact pressure to the multi-plate brake or clutch (3). According to the invention, the ball-ramp unit (23) has a positioning aid (42) with which the ball (29), which is out of force transmission with the disc pair when the parking function is engaged, remains backlash-free in a predefined ball position.

To suppress the decrease in transmission efficiency when converting rotational force into linear force. [Solution] The device comprises a shaft 20 having a shaft-side threaded portion 21, a roller 30 having a roller-side threaded portion 31 formed in the shape of a round bar and engaging with the shaft-side threaded portion 21, and a roller-side engagement portion 32 positioned at a different location from the roller-side threaded portion 31 in the axial direction and having repeating ridges and grooves extending along the circumferential direction of the round bar, and a nut 50 formed in the shape of a cylinder with the shaft 20 and roller 30 arranged inside, and having a nut-side engagement portion 52 on its inner circumferential surface that engages with the roller-side engagement portion 32, wherein multiple rollers 30 are arranged around the shaft 20 in the circumferential direction of the shaft 20, and the multiple rollers 30 are held together with the rollers 30 by a retainer 40 positioned inside the nut 50, and the retainer 40 supports multiple positions on each roller 30.

A landing gear system includes a wheel rotatably coupled to the axle about an axis. A motor is fixedly positioned relative to the axle with a clutch assembly operably coupled to an output shaft of the motor. The landing gear includes an actuator and a drive assembly. The actuator applies a braking force to the wheel. The drive assembly includes a pinion gear and a drive gear rotatably associated with the pinion gear. The drive gear is configured to transfer a rotational force to the wheel in order to provide autonomous taxiing capability. Both the brake assembly and the drive assembly are operably coupled to the clutch assembly so that the output shaft of the motor drives both the brake assembly and the drive assembly.

An elevator brake arrangement includes at least a brake unit including a body, a brake plate assembly, a spring assembly, an electromagnet arrangement and a counter element, and also a rotating brake disc. The brake plate assembly includes at least two brake plates and a state detector that is arranged to monitor the operation states of the brake plates.

A brake assembly for a work machine includes a main brake housing, a disc stack, a brake housing coupled with the main brake housing, and a piston to compress the disc stack. At least one of the main brake housing and the piston define at least two spring pockets. The at least two spring pockets are circumferentially spaced apart from each other. The brake assembly also includes at least two spring assemblies disposed between the main brake housing and the piston. The at least two spring assemblies are adapted to engage the piston with the disc stack to apply brakes via the brake assembly. Each spring pocket of the at least two spring pockets receives a corresponding spring assembly of the at least two spring assemblies. Each of the at least two spring assemblies includes at least one Belleville spring.

A brake actuator plate assembly includes an electromechanical brake actuator, a connector configured to communicatively couple with an aircraft, a wire harness configured to terminate at the connector and conduct at least one of a voltage or a current to and from an actuator motor, and an actuator plate comprising a wire harness channel configured to house the wire harness.

To provide a power transmission unit capable of realizing a more stable brake.SOLUTION: A power transmission unit 41 contains: a motor including a motor shaft housed in a case 42; a gear shaft; and an output shaft. A power of the motor shaft is transmitted to the output shaft via a gear mechanism. The power transmission unit forms a brake chamber at a position where the gear shaft and the motor shaft, constructing the gear mechanism are opposite. In the brake chamber, the power transmission unit is fitted to the outside of a shaft member as one or both of the gear shaft and the motor shaft. The power transmission unit contains: a brake rotor 76 in which a relative rotation to the shaft member is blocked; a friction material that is arranged on one side of the brake rotor, can be pressed to the brake rotor by a cam surface provided to a rotatable brake shaft 94; and a brake holder 102 that is arranged onto the side opposite to the friction material of the brake shaft, is fixed to a case, or receives a reaction force in response to the friction material that is one part of the case or the brake shaft.SELECTED DRAWING: Figure 4

A brake device (18a, 18b) comprising a first device (20) having a shaft (34); a brake element (22) having a first frictional brake surface (78a, 78b) and an engageable structure (38); a second device (24) rotatable relative to the first device (20) about a rotation axis (28), the second device (24) comprising a second member (40) having an opening (60), a second frictional brake surface (80a, 80b), and a forcing member (44) pre-tensioned to force the second frictional brake surface (80a, 80b) against the first frictional brake surface (78a, 78b); and an actuator (26) connected to the first device (20), the actuator (26) comprising an engaging structure (52) movable between a disengaged position (82), and an engaged position (54) to brake relative rotation between the first device (20) and the second device (24) about the rotation axis (28); wherein the shaft (34) is concentric with the rotation axis (28) and passes through the opening (60).

A brake device including a first device having a shaft; a brake element having a first frictional brake surface and an engageable structure; a second device rotatable relative to the first device about a rotation axis, the second device including a second member having an opening, a second frictional brake surface, and a forcing member pre-tensioned to force the second frictional brake surface against the first frictional brake surface; and an actuator connected to the first device, the actuator including an engaging structure movable between a disengaged position, and an engaged position to brake relative rotation between the first device and the second device about the rotation axis; wherein the shaft is concentric with the rotation axis and passes through the opening.

Brake module (1) for a drive system comprising at least one thrust washer (6) and at least one brake disc (5), a) wherein the at least one thrust disc (6) and the at least one brake disc (5) each have at least one friction surface which rubs against each other during braking operation, b) wherein at least one of the friction surfaces of the brake disc (5) is formed by a friction layer (20) to protect the brake disc (5) and / or thrust washer (6) from wear, c) wherein the brake disc (5) comprises a carrier (18) and at least one friction layer (20) connected to the carrier (18), and d) wherein the friction layer (20) comprises a carbon fiber fabric, characterized in that e) the thrust washer (6) is made of non-nitrided chromium steel.

A braking system for a vehicle, includes: a rotatory braking element that is fixedly connected to a wheel or wheel axle in a manner to rotate conjointly with the wheel having a rotational plane, a stationary braking element that is fixedly connected relative to a vehicle chassis so as not to rotate conjointly with the wheel, a first brake actuator that is configured to actuate the stationary braking element so as to urge the stationary braking element towards the rotatory braking element, a second brake actuator that is configured to actuate the stationary braking element so as to urge the stationary braking element towards the rotatory braking element, and a lever that is configured such that it transfers a force exerted by the first brake actuator or the second brake actuator to the stationary brake element. The first brake actuator is connected to the lever via a first connection portion and the second brake actuator is connected to the lever via a second connection portion such that the second brake actuator operates decoupled from the first brake actuator when the second brake actuator is actuated.

The disclosure provides a friction disk and a brake including a magnetic yoke iron core, a first movable plate, a friction disk, a first coil, at least one second coil, an armature and an elastic part; the magnetic yoke iron core includes a first mounting space, a second mounting space and at least one third mounting space distributed coaxially; the first movable plate is located in the first mounting space and close to a first shaft end; the friction disk is located in the first mounting space; the first coil is arranged in the second mounting space; the at least one second coil correspondingly is arranged in the at least one third mounting space; the armature is located at the second shaft end; the elastic part has a pre-tightening force that enables the armature to be far away from the magnetic yoke iron core.

The invention relates to a vehicle braking system with at least one multi-disc brake or clutch (3) acting on a vehicle axle and an electrically controllable actuator (21) by which a braking function for vehicle braking during driving and a parking function when the vehicle is parked can be engaged / disengaged in the multi-disc brake or clutch (3). According to the invention, the vehicle braking system additionally has a parking lock (41) whose pawl (43) can be brought into locking engagement with a locking gear (45) when the parking function is engaged.

A method for controlling at least one actuator (4) comprising a piston (4.2) movable in translation and an electric motor (4.1) for moving the piston (4.2) between a first position retracted from a stop and a second position in contact with the stop, the method comprising the step of controlling the power supply to the electric motor (4.1) via a speed control of the piston (4.2) by determining in real time a current consumed by the electric motor (4.1) to detect the arrival of the piston (4.2) in the contact position, characterized in that the detection of the contact position comprises the step of determining a slope of evolution of the current consumed by the electric motor (4.1) during the movement of the piston and the step of detecting an increase in the slope corresponding to the arrival of the piston (4.2) in the contact position. Braking device, braked wheel and aircraft for implementing this method. FIGURE IN ABRIDGED DIAGRAM: Fig. 1

axle with an axle housing (1) having an axle housing flange (14) and with a brake unit which is arranged in the axle housing, wherein the axle has two shafts (2, 3) rotatable about a common axis of rotation (20), wherein the brake unit comprises: - an electromagnet unit (4) with at least one coil (5, 6) for generating a magnetic field; - at least one spring element (10, 11); - at least one brake rotor (12, 13) per shaft (2, 3), which is rotationally fixed to the corresponding shaft (2, 3), but is axially displaceable thereon; and - at least one magnetizable armature element (8, 9); where - the electromagnetic unit (4) is fixed in position in the axle housing (1); - the magnetizable armature element (8, 9) and the brake rotors (12, 13) are arranged between the electromagnet unit (4) and the axle housing flange (14); - the magnetizable armature element (8, 9) is arranged axially displaceable but non-rotatable in the axle housing (1) between the brake rotors (12, 13) and the electromagnet unit (4) along the axis of rotation (20); and - the spring element (10, 11) is arranged and supported in such a way that it pre-tensions the anchor element towards the brake rotors (12, 13) to provide a braking force, characterized in that, in order to generate a braking force, the current flow through one or both of the coils (5, 6) is reduced, thereby reducing the attractive force on the corresponding magnetizable armature element (8, 9) or on both magnetizable armature elements (8, 9), wherein, when the attractive force becomes sufficiently low, the corresponding magnetizable armature element (8, 9) is pressed by the corresponding spring element (10, 11) towards an axially displaceable force transmission element (7), which displaces accordingly towards a first of the brake rotors (12), which, due to its displaceability, is in turn displaced towards a displaceable friction element (16), which in turn is displaced towards a second of the brake rotors (13), whereby corresponding frictional forces occur between the axle housing flange (14), the second brake rotor (13), the friction element (16), the first brake rotor (12) and the force transmission element (7), which cause braking and, if necessary, complete locking of the rotatable shafts (2, 3). wherein the electromagnet unit (4) is firmly connected to the axle housing (1) and / or the axle housing flange (14), in particular by screwing.