77results 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).

Brake (1) with a device for determining a wear limit, comprising a housing (2), at least one first brake body (3), at least one second brake body (4) and a pressure piece unit (10) with a pressure piece (12) which is displaceable relative to the housing (2) in a first direction to press the at least one first brake body (3) and the at least one second brake body (4) against each other to brake, i.e. to close the brake, and is displaceable in a second direction to release the brake, i.e.to open the brake, a sensor (20) which is configured to detect a positional relationship between it and a detection surface (11) formed on the pressure piece unit (10), wherein if the brake (1) has not reached its wear limit, the positional relationship between the sensor (20) and the detection surface (11) does not change during the movement of the pressure piece (12) in the first direction, and if the brake (1) has reached its wear limit, the positional relationship between the sensor (20) and the detection surface (11) changes during the movement of the pressure piece (12) in the first direction by a relative movement between the sensor (20) and the detection surface (11).

Hydrostatic rotary machine comprising: - an internal element (1) and an external element (2) which are coaxial and mounted to rotate relative to one another about an axis of rotation (R), one of these elements being a rotor and the other of these elements being a stator; - a counter-brake disc (31) mounted on a distribution base (4), extending radially around the distribution base (4) and rotationally coupled to the external element (2); - a passive brake piston (36) designed to activate a brake (21) under the action of an elastic element (43) and mounted to be axially movable with respect to the counter-brake disc (31); - a release hydraulic chamber (50) arranged between the counter brake disc (31) and the passive brake piston (36).

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 multidisc brake (1) for a motor vehicle has two multidisc devices (7, 8) and an actuating device (9) for brake-actuating and / or brake-releasing operation of the multidisc devices (7, 8) and has an electric drive (16) for the translational actuation (spreading) of the actuating device, in particular of the ramp unit (9). In the case of a spreading operation, the multidisc devices (7, 8) are preloaded in a metered manner by the actuating device and generate desired frictional engagement, and correspondingly reversed control of the actuating device allows a correspondingly metered brake release. By means of the electric drive (16), the action of the multidisc brake (1) can be metered overall in a particularly accurate, sensitive and compensated manner in modern vehicle topology taking into consideration all peripheral brake components and systems, including recuperation.

The invention relates to a method for electronic air gap control of an electrical motor vehicle braking system comprising electrical wheel brakes, wherein a resting position is adopted and maintained by supplying electrical energy. In this way, mechanical elements for adjusting the resting position can be advantageously done away with. The invention also relates to an electrical motor vehicle braking system comprising electrical wheel brakes for carrying out an electronic air gap control method of this type.

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.

An electromagnetic braking device includes a brake disk, a fixed disk, an armature, a biasing member for biasing the armature, and a stator for attracting the armature. In a stator magnetic circuit member, a first yoke, a permanent magnet, and a second yoke are arranged in this order from one end to the other end of a U shape. In a rotatable state or a rotation braking state, even when the coil energization is OFF, the rotatable state or the rotation braking state is maintained. When a current of a predetermined magnitude flows through the coil in a first direction in the rotatable state, the state shifts to the rotation braking state, and when a current of a predetermined magnitude flows through the coil in a second direction in the rotation braking state, the state shifts to the rotatable state.

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.

The invention relates to a vehicle braking system having at least one multi-disc brake or clutch (3) which acts on a vehicle axle of a vehicle and by means of which a brake function for a vehicle braking process during a driving operation and a parking function when the vehicle is parked can be engaged / disengaged. According to the invention, an electrically controllable actuator (21) is provided which is associated with the multi-disc brake or clutch (3) and by means of which the braking function as well as the parking function can be engaged / disengaged.

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.

A brake device includes a brake caliper with a first frictional surface and a first actuation surface, a pressing part of the brake device being linearly guided along a first straight line on the brake caliper. The pressing part has a second frictional surface and a second actuation surface, a region being provided between the first frictional surface and the second frictional surface for arranging a brake element. The brake device has a rotatable spreading element which interacts with the first actuation surface and the second actuation surface. During a rotation of the spreading element, the rotation occurring in order to actuate the brake device, a first spreading element surface is in direct contact with a first rolling surface and rolls substantially on the first rolling surface, and the first rolling surface corresponds to the first actuation surface or the second actuation surface.

The invention relates to a vehicle braking system with at least one multi-disk brake or clutch (3) acting on a vehicle axle, by means of which a braking function for vehicle braking while driving and a parking function when the vehicle is parked can be engaged / disengaged. According to the invention, an electrically controllable actuator (21) is assigned to the multi-disk brake or clutch (3), with which both the braking function and the parking function can be engaged / disengaged.

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.