394results about "Self acting brakes" patented technology

In some aspects, a speed reducer includes an inner gear having an inner gear hole; an outer gear having an outer gear hole, arranged in the inner gear hole and meshing with the inner gear; an eccentric wheel rotatably supported in the outer gear hole, the outer gear being driven by the eccentric wheel to revolve around the rotation axis of the eccentric wheel while rotating around its own axis; a brake block arranged on the eccentric wheel to rotate together with the eccentric wheel, the brake block being movable relative to the eccentric wheel between a braking position and a release position; an elastic member coupled to the eccentric wheel and the brake block, and configured to press the brake block towards the braking position; and a drive member coupled to the eccentric wheel, a rotation axis of the drive member being coaxial with the rotation axis of the eccentric wheel.

In some aspects, a transmission device with a reverse braking function includes a housing seat having a seat hole; a driven shaft rotatably and at least partially supported in the seat hole; a brake block arranged on the driven shaft and rotatable together with the driven shaft, the brake block being movable relative to the driven shaft between a braking position where the brake block abuts against the housing seat and a release position where the brake block is separated from the housing seat; an elastic member coupled to the driven shaft and the brake block and configured to press the brake block towards the braking position; and a drive member coupled to the driven shaft.

IMPROVED LINEAR ACTUATOR Linear actuator (1) comprising: - a linear unit (2) capable of generating linear motion, - a motor (3) for motorized drive of the linear unit (2), comprising a drive shaft (4), - a drive connection (5) extending from the motor (3) to said linear unit (2), - a centrifugal brake (6), connected to the drive shaft (4) and / or to the drive connection (5) via a one-way clutch device (7).The one-way clutch device (7) is configured such that: - when the drive shaft (4) or the drive connection (5) is driven in a first direction of rotation, the centrifugal brake (6) is not driven in rotation by said drive shaft (4) and / or said drive connection (5), and therefore produces no braking torque; - when the drive shaft (4) or the drive connection (5) is driven in a second direction of rotation, opposite to the first direction of rotation, the centrifugal brake (6) is driven in rotation by said drive shaft (4) and / or said drive connection (5) and can then produce, beyond a predetermined rotational speed, a braking torque on the drive shaft (4) and / or the drive connection (5). Figure to be published with the abbreviation: Fig. 1.

The present application belongs to the technical field of mechanical braking and provides a novel brake and a hub motor. The novel brake comprises: a brake stator, an armature, a main coil, an elastic component, N friction discs, N movable plates and assembly parts, wherein the N movable plates and the N friction discs are alternately arranged, the N-th movable plate and the N-th friction disc are adjacently arranged, the N-th friction disc abuts against a limiting step, and N is an integer larger than or equal to 1. The peripheral size of the N friction discs is larger than the peripheral size of the N movable plates, the peripheries of the N friction discs all being provided with fitting parts, and the fitting parts being configured to fit a braking part. The N friction discs and the N movable plates are all sleeved on the periphery of the brake stator, so that the total thickness of the novel brake is greatly reduced. The friction discs no longer fit a brake axle by means of a central hole, but fit the braking part by means of the fitting parts arranged on the peripheries, so that the novel brake can be applied to a wider range of application scenarios, and the sizes of the brake stator and the armature can be designed more freely, thus reducing the overall size of the novel brake.

The invention relates to a linear actuator (1) comprising: - a linear unit (2) able to generate a linear movement, - a motor (3) for a motorized drive of the linear unit (2), comprising a drive shaft (4), - a drive connection (5) extending from the motor (3) to said linear unit (2), - a centrifugal brake (6), connected to the drive shaft (4) or to the drive connection (5) via a one-way clutch device (7). The one-way clutch device (7) is configured such that: - when the drive shaft (4) or the drive connection (5) is driven in a first direction of rotation, the centrifugal brake (6) is not rotated by said drive shaft (4) or said drive connection (5), and then does not produce any braking torque, - when the drive shaft (4) or the drive connection (5) is driven in a second direction of rotation, opposite to the first direction of rotation, the centrifugal brake (6) is rotated by said drive shaft (4) or said drive connection (5) and can therefore produce, upward of a predetermined rotational speed, a braking torque acting on the drive shaft (4) or on the drive connection (5).

Non-backdriving rotation transmission mechanism includes an input shaft, an output shaft, a fixed casing having a cylindrical cavity that includes a cylindrical braking surface, at least one braking element connected to the input shaft and output shaft and adapted to interact with said braking surface, and mechanism for actuating the braking element from a non-braking condition to a braking condition.The braking element includes two brake pads articulated to each other and each having at least one braking contact zone adapted to interact with said braking surface, which brake pads are movable from an engagement position wherein the contact zones are remote from each other and are in contact with said braking surface, to a free position wherein the contact zones are close to each other and are not in contact with said braking surface.

The brake assembly includes a housing, a rotor disc. The rotor disc includes at least one internal cavity. The at least one internal cavity includes a pawl and a thermal fuse. In use, the thermal fuse is configured to maintain the position of the pawl in the at least one internal cavity when a temperature is below a predetermined threshold, and wherein the thermal fuse is configured to melt when a predetermined threshold of temperature is reached during braking to release the pawl out of the at least one internal cavity towards the housing. The housing includes at least one recess configured to receive the pawl.

A retractor for a belt for retaining objects in space environments that has an outer housing containing a spool for the belt is associated with a centrifugally activated braking mechanism that allows the belt to unwind normally when the belt is pulled to extract the belt from the belt retractor. During a rewinding phase, the centrifugally activated braking mechanism automatically limits a rewinding speed of the belt on the spool.

The utility model relates to the field of fans, in particular to an axial flow fan with failure stalling protection, which is characterized in that a middle shell is supported in a fan frame, and a stator assembly is arranged in the middle shell; the rotor assembly is supported in the stator assembly; the limiting mechanism comprises a limiting wheel fixedly connected to the rotating shaft, and at least one limiting tooth is arranged on the limiting wheel; the locking claw is hinged to the middle shell, the far end of the locking claw is provided with a limiting claw tip, and the locking claw is connected with the middle shell through a detachable connecting structure. When the service life of the draught fan reaches the limit, the draught fan can stop running in time, electric leakage of the draught fan caused by abnormal running is avoided, shutdown operation of a system is facilitated, and adverse effects on equipment caused by running of the equipment using the draught fan under abnormal conditions are avoided.

[Problem] A design is provided that is capable of suppressing the rattling of an input element. [Solution to the problem] A leaf spring 6 has: two held sections 43, which are arranged on both sides of an input-side engagement section 14 in respect of a second direction perpendicular to a first direction, which is a direction of movement of a pressing surface 33, which moves away from or towards a pressed surface 7 and a central axis of an input element 3, and are held elastically between the input-side engagement section 14 and an input-side gripped section 34; and a base section 44, which connects the two held sections 43.

In a non-excitation actuated brake (1), the magnetic force of a permanent magnet (17) is used to hold a suction plate (13) at a brake force release position (13A) that is located away from a friction brake plate (12). The coil energization of an electromagnet (16) may be performed only when moving the suction plate (13) held at a brake force application position (13B) toward the brake force release position (13A) and when moving the suction plate (13) held at the brake force release position (13A) toward the brake force application position (13B). Heat generation and power consumption due to continuous coil energization can be suppressed. By setting the electromagnetic force by the electromagnet (16) to an appropriate value, it is possible to reliably and quickly switch between the brake force application state and the brake force release state.

To describe a device 1 comprising members in a kinematic relationship.SOLUTION: A kinematic relationship is at least partially governed by at least one magnetic induction force that introduces a threshold value of a force. This, in fact, provides a threshold value with respect to a partial movement and a hysteresis degree, and brakes movement until a sufficiently large energizing force E is applied. The effect can be further altered by use of additional magnetic induction force interaction with at least one additional member, and energizes or slows once started movement, and / or brakes the movement when once reached a new location.SELECTED DRAWING: Figure 1

An automatic conveyor device system and a braking device therefor. A braking device includes: a brake drum; a brake arm, with a brake lining provided thereon; a spring member that acts on the brake arm, urging the brake lining on the brake arm to make contact with the brake drum; an electromagnetic actuator, including an electromagnetic rod, where when the electromagnetic actuator is energized, the electromagnetic rod lifts the brake arm to separate the brake lining of the brake arm from the brake drum; and a sensor, configured to monitor a first position and a second position with a given spacing a during the extending process of the electromagnetic rod, and to respectively output a first signal and a second signal when the electromagnetic rod passes through the first position and the second position.

A brake system includes a series of rotors for operatively coupling to a shaft and stators for operatively coupling to a frame. A service brake system includes a singular annular service piston extending continuously around the series of rotors and stators and a parking brake system includes a singular annular parking piston positioned to extend continuously around the series of rotors and stators. The service piston nests with the parking piston, under a spring bias, such that the parking piston and service piston continuously engage together around the series of rotors and stators to thereby create the parking brake forces. Springs act on the parking piston to drive the parking piston and nested service piston to engage for parking brake forces. Pressurization of the parking piston deactuates the nested pistons. Then separate pressurization of fluid acts on the service piston to overcome the spring bias and separate the service piston from the parking piston to create service brake forces.

The invention belongs to the technical field of hoisting equipment, particularly adapts to high-altitude and low-altitude multi-scene hoisting operation and high-altitude safety protection, and particularly discloses an ultra-high molecular weight polyethylene fiber rope self-locking device which comprises a shell, a fixing handle is arranged on the shell, and a main ratchet wheel rotating disc is rotationally installed in the shell; a first pawl is arranged in the shell and matched with the main ratchet wheel rotating disc, and an auxiliary ratchet wheel rotating disc is further arranged in the shell. Through cooperation of the main ratchet wheel rotating disc and the auxiliary ratchet wheel rotating disc, the fiber rope forms a curved track, the number of locking stress points of the fiber rope is increased to two, and the local stress load of the fiber rope is dispersed; the problems that the ultra-high molecular weight polyethylene fiber rope is locally prone to friction damage and the structure is weakened during high-low-altitude operation are solved, meanwhile, the locking failure risk caused by extreme dynamic impact is reduced, and the complex and harsh safety protection requirement of the high-low-altitude operation can be stably met.

The present invention provides a differential mechanical speed limiter, which includes a support frame, an outer brake drum and an inner brake drum sequentially installed from the inside out, and the three are coaxially arranged. The ends of the active member and the driven member are both movably connected to the friction blocks, and the friction blocks are located between the outer brake drum and the inner brake drum. After the center of the active member is connected to the center of the driven member, a linkage mechanism is formed. The structure of the linkage mechanism is symmetrical. A driving shaft is provided in the middle of the active member. When the driving shaft rotates along the direction of the force under the action of an external force, the relative position between the active member and the driven member changes, causing the shape of the linkage mechanism to change, and the friction blocks generate a displacement change along the radial direction of the support frame, thereby squeezing the inner brake drum or the outer brake drum to provide braking friction force. The differential mechanical speed limiter described in the present invention solves the problem of realizing product lightweight of the existing speed limiter using rotational centrifugal force, and can be used bidirectionally.

The invention relates to an anti-lock device (1) for a wheel, which is arranged in a hydraulic pressure circuit between a master cylinder (2) and at least one brake caliper (3) of the wheel, in particular for an aircraft. According to the invention, the device comprises: a centrifugal element (4) attached to a rim (5) of the wheel and movable from a retracted position when the wheel is rotated at a speed below a threshold rotational speed to a deployed position due to centrifugal force when the wheel is rotated at a speed beyond the threshold rotational speed; a pressure regulating system (6) comprising a hydraulic inlet (6a) connected to the master cylinder (2) and a hydraulic outlet (6b) connected to the hydraulic inlet of the brake caliper (3), the pressure regulating system (6) is movable between a hydraulic circuit closed position when the centrifugal element (4) is in the retracted position and a hydraulic circuit open position driven by the centrifugal element (4) in the deployed position.

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).

An automatic descent control device includes a line configured to be attached to a load. A line system retracts slack from the line when the line is not loaded and extends the line when the line is loaded. At least one braking system provides a braking force when the line is loaded so as to control extension of the line and a descent rate of the load. The at least one braking system is operable in at least two configurations, a first configuration that the at least one braking system lowers the load at a first descent rate, and a second configuration that the at least one braking system lowers or locks the load at a second descent rate. The load being a constant and the first descent rate is greater than the second descent rate.

The present invention relates to a differential, which includes a planetary gear and a planetary gear shaft, wherein the planetary gear is capable of rotating relative to the planetary gear shaft, and further includes a speed limiting mechanism arranged on the planetary gear, the speed limiting mechanism including an elastic element and a slider, when the rotational speed of the planetary gear is lower than a rotational speed threshold, the slider slides on the planetary gear shaft with a first contact point on a first surface under the action of both a first elastic force exerted by the elastic element and a first centrifugal force, and when the rotational speed of the planetary gear is greater than the rotational speed threshold, the slider slides on the planetary gear shaft with a second contact point on the first surface under the action of both a second elastic force of the elastic element and a second centrifugal force, wherein the second contact point is closer to the edge of the first surface of the slider than the first contact point, so that the friction force when the slider contacts the planetary gear shaft at the second contact point is greater than the friction force when the slider contacts the planetary gear shaft at the first contact point.

The present invention relates to a clutch-brake unit, in particular for an aircraft, comprising a brake, a clutch and a control unit, which is designed and arranged to actuate the brake and / or the clutch, wherein the control unit has an actuator and a movable control element, wherein the actuator is designed and arranged to move the control element from a neutral position to a first and / or second control position, thereby enabling the brake and / or the clutch to be actuated.

The present invention discloses a vehicle, a braking system, a brake, and a method for monitoring the braking condition. In the brake, the flange rotor is connected to the motor shaft and additionally to the stator via a rolling connection, so that the flange rotor can rotate together with the shaft of the brake motor relative to the stator. A slotted disk is arranged on the stator; an armature is connected to the flange rotor via a spring element, so that the armature can move back and forth between the flange rotor and the slotted disk along the axis of the flange rotor; a permanent magnet generates a first magnetic force on the armature. When the coil is de-energized, the first magnetic force opposes the restoring force, causing the armature to move towards the slotted disk and engage with it. When the coil is energized, it generates a second magnetic force on the armature.The combined force of the second magnetic force and the restoring force opposes the first magnetic force, causing the armature to move towards the flange rotor and detach from the slotted disc. This locks and unlocks the corresponding brake motor. The brake is integrated into the motor, reducing the size, noise, and energy loss of the braking system, as well as manufacturing and testing difficulties.

An electric motor having an electromagnetically actuable brake, wherein the brake is releasable by means of a pivotably arranged manual release lever (7), in particular lever part, in particular in the event of failure of the voltage supply, current supply failure or if the brake is not being energized, wherein a securing device for limiting the pivoting movement of the manual release lever (7) is arranged on the electric motor, wherein the securing device has at least one holding part (3), a rod part (4) and a joint, wherein the holding part (3) is fastened to the electric motor, wherein the rod part (4) is arranged rotatably by means of a joint formed between the rod part (4) and the holding part (3), wherein the limiting of the pivoting movement of the manual release lever (7) is dependent on the rotational position of the rod part (4).

The invention relates to an overspeed control brake device in a brake control system. The overspeed control brake device comprises a mounting shaft, a speed sensing mechanism, a transmission mechanism and a brake mechanism. The mounting shaft is connected with a rotating shaft of an equipment driving device; the speed sensing mechanism comprises a flywheel and a plurality of centrifugal blocks; the transmission mechanism comprises a driving rod and a rotating shaft; the brake mechanism comprises a friction plate kit and a supporting spring. When the rotating speed of equipment exceeds a set threshold value, the centrifugal block moves in the radial direction of the flywheel under the action of centrifugal force, the driving rod is linked to rotate, the friction plate kit slides in the direction away from the flywheel, the supporting spring is stretched, the friction plate kit is attached to the friction body, and friction braking is achieved. The device achieves the effects that braking is rapidly started when the equipment is overspeed, and safe operation of the equipment is ensured.

Turbomachine (10) for an aircraft, comprising a compressor (12), an annular combustion chamber (16), a turbine (20), and a tube (52) extending axially inside a shaft (28) and comprising an upstream end (52a) rotationally fixed to an upstream end (28a) of the shaft (28), characterized in that the shaft (28) comprises a downstream end (28b) that is free to rotate relative to a downstream end (52b) of the tube (52) over a predetermined angular stroke (β), and that is connected to this downstream end (52b) of the tube (52) by an automatic brake pad system (54). Abbreviated figure: Figure 1

A braking system (3), in particular emergency braking system, in a drive unit, which drive unit includes at least one motor (8) and at least one unit (6) driven by the motor (8). The braking system has: a plurality of controllable brakes (16a-16b), which are arranged and designed to act on the drive unit; and a controller (12), which is designed to preselect and accordingly pilot-control a number of brakes (16a-16b) from amongst said plurality of brakes (16a-16b) depending on a state or load situation of the drive unit, so that, when the braking system (3) is activated, the drive unit can be acted on only by way of said preselected number of brakes (16a-16b).

The invention relates to a hydraulic brake, clutch or clutch-brake combination for a work machine, which is designed to be switchable by means of a hydraulic medium delivered by a hydraulic pump (18), with a rotor disk (4) arranged on a shaft in a rotationally fixed but axially displaceable manner and a counterpart (15) cooperating therewith, wherein the counterpart (15) is mounted axially displaceably in relation to the rotor disk (4), with a mechanical force transmitter (17) designed to apply force to the counterpart (15) in the axial direction, and with a hydraulic piston (13) provided by a cylinder-piston arrangement (12), which is designed to be movable in the axial direction and is designed to act on the counterpart (15) in the event of pressure being applied with hydraulic medium delivered by the hydraulic pump (18) in a manner counter to the force applied by the force transmitter (17), characterized in thatthat the hydraulic pump (18) fluidically interacts with a reservoir (20) accommodating hydraulic fluid, wherein the hydraulic pump (18) and the reservoir (20) are designed for intended use exclusively with the cylinder-piston arrangement (12), and that a bypass line (24) is provided which fluidically bypasses the hydraulic pump (18) and fluidically connects the reservoir (20) to the cylinder-piston arrangement (12), wherein an electrically switchable valve (25) is integrated into the bypass line (24) and is designed to open the bypass line (24) in the event of a de-energized position of the valve (25).