117results about "Fluid clutches" patented technology

A system for operating a magnetorherological (MR) fluid actuator unit between bodies mau have at least one MR fluid actuator unit including a motor assembly, the motor assembly operating within a first frequency range, and a MR fluid clutch apparatus connected to the motor assembly to apply a variable amount of force from the motor assembly between at least two of the bodies, the MR fluid clutch apparatus operating within a second frequency range, the second frequency range being higher than the first frequency range. At least one sensor provides data indicative of a state of at least one of the bodies. The system may be used for: receiving the data from the at least one sensor: determining from the data that the motor assembly has to accelerate or decelerate to control an amplitude and direction of a relative speed between input and output of the MR fluid clutch apparatus to transmit a desired force between the bodies: controlling the motor assembly to accelerate or decelerate toward the given value at the first frequency range, and concurrently reducing a torque transmission from the MR fluid clutch apparatus during a lag period in which the torque transmission acts opposite to the desired force.

The invention relates to a silicone oil clutch with a transverse swinging heat dissipation function, which belongs to the technical field of connecting devices between tractors and machinery and comprises a shell, auxiliary heat dissipation ribs, an auxiliary transmission gear, a main transmission gear, a driving motor, a motor fixing plate, a driving gear, a driven gear, a temperature sensor, a valve plate, a driving disc, a working cavity, a driving shaft and main heat dissipation ribs. The gear set drives the main radiating ribs and the auxiliary radiating ribs to swing synchronously, the swing angle of the radiating ribs is controlled through a double-closed-loop PID algorithm, and the radiating effect is dynamically adjusted. Compared with a traditional fixed radiating rib, the radiating rib can quickly respond to different working conditions, optimize the cooling effect, ensure the viscosity stability of silicone oil, improve the performance of a clutch, prolong the service life of the clutch and reduce energy consumption, and is suitable for a cooling system of high-load mechanical equipment.

To provide a magnetic viscous fluid device which can be downsized while suppressing reduction of torque that is transferred between members via a magnetic viscous fluid.SOLUTION: A magnetic viscous fluid device 1 comprises: a rotary plate 20 which is fixed to a rotary shaft 10; yokes 30 and 40 having a first opposite face that is opposed to the rotary plate 20 via a first clearance and a second opposite face that is opposed to the rotary plate 20 via a second clearance; a magnetic viscous fluid 50 filling the first and second clearances; and a coil 60 forming a magnetic path at the time of electrification. A casing 80 using a non-magnetic substance is extrapolated to a part of outer peripheral surfaces of the yokes 30 and 40. The casing 80 is disposed so as to cover a part of a region, in which the coil 60 is present radially inside and not to cover the remaining part of the coil including region on the outer peripheral surface of the yoke 30. In a view in a direction of an axis, a part of the coil including region on the outer peripheral surface of the yoke 30 is formed inside while being inscribed or not being inscribed to the remaining part of the coil including region on the outer peripheral surface of the yoke 30.SELECTED DRAWING: Figure 1

This invention discloses a high-elasticity coupling for the transmission of the drying cylinder in a paper machine, relating to the field of paper machinery transmission technology. It solves the industry pain points of existing magnetorheological fluid couplings, which offer high precision but are difficult to maintain and have high manufacturing costs. The invention features a closed annular fluid cavity inside the coupling hub, a purely radial through-hole on the outer circumference, and a quick-connect coupling with a 90° tangential deflection flow channel. Two sets of modular self-excited oscillation units with different natural frequencies can be detachably connected via the quick-connect coupling, simultaneously canceling fundamental frequency mechanical vibration and second-harmonic Taylor vortex vibration. It also integrates an electromagnetic coil phase compensation and active enhancement system, and a magnetorheological fluid hydraulic lock bypass overload protection device. This invention improves maintenance efficiency by 200 times, reduces manufacturing costs by 60%, achieves vibration control accuracy below 0.005μm, and has an overload response time of <1ms, making it suitable for high-end paper equipment transmission systems.

To disclose a sealed piston apparatus and related systems for use with vehicle torque converters.SOLUTION: A vehicle torque converter includes a housing and a clutch including a piston in the housing. The piston has: a first side partially defining a first chamber; and a second side which is opposite to the first side and partially defines a second chamber. The vehicle torque converter also includes: a first seal operatively coupled to the piston; and a second seal operatively coupled to the piston. The vehicle torque converter also includes an orifice positioned on the piston radially inward relative to a clutch pack of the clutch. The orifice is configured to provide flow of a fluid between the first and second chambers during a lockup on operation of the torque converter to lubricate the clutch. The first seal is a one-way seal.SELECTED DRAWING: Figure 4

To suppress wear without impairing assembling workability of a damming member.SOLUTION: A fan coupling 1 includes: a clutch disc 3 fixed to a drive shaft 2 to rotate integrally with the drive shaft; a clutch housing 4 to which the fan is fixed; a labyrinth passage 12 provided between an outer surface of the clutch housing 4 and an outer side surface of the clutch disc 3 facing each other; a supply passage 13 that supplies a working fluid from a torque transmission chamber 11 to the labyrinth passage 12; a return passage 14 that guides the working fluid discharged radially outward from the labyrinth passage 12 to a storage chamber 10; and a damming member 15 for guiding the working fluid discharged from the labyrinth passage 12 to the return passage 14. The clutch housing 4 is provided with a groove 44 in which the damming member 15 is incorporated, and a spacer 16 for filling an incorporation gap of the damming member 15 is inserted into the groove 44.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of silicone oil clutches, in particular to an electric control silicone oil clutch which comprises a silicone oil clutch body, a plurality of first mounting rings are arranged on the surface of a connecting wire, a plurality of reinforcing rods are arranged between every two adjacent first mounting rings, and heat insulation protection devices are arranged on the outer surfaces of the first mounting rings. A mounting block is arranged on the surface of one side of the silicone oil clutch body and is in a circular truncated cone shape, and a plurality of first reinforcing ribs and a plurality of second reinforcing ribs are arranged on the inner wall of the mounting block. According to the heat insulation protection device, through the supporting effect of the supporting assembly, the heat of the connecting wire can be fully dissipated, and the silicone oil clutch is prevented from being broken down. The mounting block of the silicone oil clutch is in the shape of the circular truncated cone, and the first reinforcing rib and the second reinforcing rib are arranged, so that the strength of the mounting block is remarkably improved, breakage of the mounting block is avoided, and the service life of the silicone oil clutch is prolonged.

The invention relates to a magnetorheological brake (1) which has a stator (2), a rotor (3), which is rotatably arranged relative to the stator (2), a gap (4) between the rotor (3) and the stator (2), which gap is delimited by a stator surface (2.1) and a rotor surface (3.1), and a magnetorheological powder (5), which has powder particles and which is located in the gap (4) between the rotor (3) and the stator (2), wherein the powder particles of the powder (5) have first powder particles (5.1) and second powder particles (5.2), and the first powder particles (5.1) have a grain size which lies below a first grain size limit value, and the second powder particles (5.2) have a grain size which lies above a second grain size limit value, and the first grain size limit value and the second grain size limit value are matched to one another such that, in the case of a magnetic field (6) passing through the gap (4), at least one contact force arises at a contact point (7) between two powder particles, which contact force is lower than at least one contact force between a powder particle and the stator surface (2.1) or a contact force between a powder particle and the rotor surface (3.1). The invention further relates to the use of a magnetorheological brake (1) for an operating element, to a force feedback actuator (8), to a steering device (12), and to a method.

A furniture drive (1) for an actuating arm (2), comprising a coupling device (3) for the actuating arm (2) having at least one driving part (4) and at least one driven part (5) rotatable relative to the driving part, wherein the coupling strength between the at least one driving part (4) and the at least one driven part (5) is adjustable by an adjusting device, the at least one driving part (4) and the at least one driven part (5) being spaced apart from each other to form a gap (6), the gap (6) being filled with a magnetorheological medium (7) that can be influenced by a magnetic field, and the adjusting device for adjusting the coupling strength comprises a device (8) for generating a magnetic field due to magnetic polarization of the magnetorheological medium (7).

Clutch assemblies and associated methods are disclosed herein. In an example, a clutch assembly comprise a first terminal, a second terminal, a clutch body enclosing a torque transfer fluid, and one or more electropermanent magnets (EPMs), each configured to generate a respective EPM magnetic field. The clutch assembly is configured to transmit a torque between the first terminal and the second terminal with a torque capacity that is at least partially based on the EPM magnetic fields. In an example, a method of operating a clutch assembly comprises transitioning each of one or more EPMs to a fully depolarized state, a fully polarized state, or an intermediate polarization state. In an example, a method of operating a clutch assembly comprises controlling each of one or more EPMs of the clutch assembly to vary a total EPM magnetic flux generated by the one or more EPMs.

The utility model discloses a kind of signal ring electrically-controlled silicon oil clutches with magnetic conduction capacity, to solve the more assembly parts of existing silicon oil clutch, assembly process is complex, and larger failure risk. It can shorten the service life of silicon oil clutch, reduce user experience and increase the problem of product waste. Its technical scheme main point is: including main shaft, driving plate, shell, end cover, excitation coil and bearing, driving plate is fixedly connected with main shaft, shell is rotatably connected with driving plate by bearing, shell is connected with end cover by cover shell screw, excitation coil is connected on main shaft, signal ring is fixedly connected with shell, the cross section of signal ring is Z type. The utility model can keep the original cutting magnetic induction line to generate hall signal function by signal ring on shell participate in magnetic circuit transmission function, ensure that transmission magnetic force is invariable, reduce the component material, assembly is more simplified, reduce failure risk.

An apparatus for transmitting power from a power generating device to an electrical machine suitable to be installed onboard a motor vehicle is disclosed. The apparatus comprises a power take-off (PTO) device which comprises a gear wheel which is suitable to receive rotary power from the power generating device. The apparatus further comprises a power transmission which is suitable to receive rotary power from the gear wheel and to transfer at least part of the received rotary power to the electrical machine. The apparatus further comprises a decoupler that is interconnected between and transfers rotary power from the gear wheel in input to the power transmission, wherein the decoupler is at least partially fitted inside the gear wheel and reduces the torque amplitude transmitted in input to the power transmission relative to the torque amplitude received in input by the gear wheel from the power generating device.

A viscous friction clutch (100, 00) includes a rotor (106, 206), a housing (112, 212) rotatable relative to the rotor, a working chamber (115, 215) between the rotor and the housing such that a volume of shear fluid can be selectively introduced into the working chamber to contact both the rotor and the housing, an electromagnetic coil (101, 201), a valve assembly (107, 207) that controls the volume of shear fluid present in the working chamber, and a flux path (A, A') that magnetically joins the electromagnetic coil with the valve assembly. The flux path passes through a flux guide portion (105, 105', 205) made of a ferromagnetic material that extends through the rotor in the interior of the viscous friction clutch and across a flux gap (B) that traverses both an air gap and a non-ferromagnetic portion (112b-1, 212b-1) of the housing.

The present invention relates to a braking system for a vehicle, preferably an electric drive vehicle, comprising a brake (5) for at least one vehicle wheel (13), which does not require an additional brake hydraulic device, and which is filled with a viscous fluid (9) that generates friction in the brake (5) to generate a braking force, and which is arranged in a sealed container (3).

The present disclosure provides a silicone oil fan clutch and a vehicle, which relate to the field of vehicle clutch technology, wherein the silicone oil fan clutch includes a housing, a driven disc, an oil inlet valve plate and an oil return valve plate. A fan is provided on the outside of the housing. The front end face of the driven disc is provided with a primary oil return hole and a secondary oil return hole, and the edge of the rear end face is provided with a primary oil inlet hole and a secondary oil inlet hole that are oppositely arranged and spaced apart. The area of ​​the primary oil inlet hole is larger than that of the secondary oil inlet hole. The oil inlet valve plate controls the primary oil inlet hole and the secondary oil inlet hole to be closed when the clutch is in a disengaged state, and as the oil inlet valve plate rotates, the primary oil inlet hole and the secondary oil inlet hole are opened in sequence. The oil return valve plate controls the primary oil return hole and the secondary oil return hole to be completely sealed when the clutch is in a disengaged state. The clutch adds an oil return valve plate for sealing the return hole, and improves the design of the oil inlet hole, thereby increasing the proportion of time the fan is in a primary engagement state, reducing the power consumption of the whole vehicle, and improving the NVH performance of the whole vehicle.

The viscous friction clutch (100; 200) comprises a rotor (106; 206), a housing (112; 212) rotatable relative to the rotor, an actuation chamber (115; 215) disposed between the rotor and the housing, capable of selectively introducing a predetermined amount of shear fluid so that the shear fluid contacts both the rotor and the housing, an electromagnetic coil (101; 201), a valve assembly (107; 207) for controlling the amount of shear fluid held in the actuation chamber, and a magnetic flux path (A; A') magnetically connecting the electromagnetic coil and the valve assembly. The magnetic flux path passes through a magnetic flux guide portion (105; 105'; 205) made of a ferromagnetic material extending through the rotor inside the viscous friction clutch, and crosses a magnetic flux gap (B) that traverses both the air gap and the non-ferromagnetic portion (112b-1; 212b-1) of the housing.

To provide a magnetic viscosity fluid device which can form a magnetic path efficiently by reducing magnetic resistance of a yoke.SOLUTION: A magnetic viscosity fluid device 1 includes: a rotary plate 20; a first yoke 30 which faces the rotary plate through a first gap S1; a second yoke 40 which faces the rotary plate through a second gap S2; a magnetic viscous fluid 50 disposed between the first gap and the second gap; and a coil 60. The first yoke and the second yoke have a magnetic flux delivery part 70. The first yoke has: a first yoke base part 31 around which the coil is arranged; and a first yoke first extending part 32. The second yoke 40 has: a second yoke base part 41 disposed at a major surface 22 side of the rotary plate; and a second yoke extending part 42 which forms the magnetic flux delivery part with the first yoke first extending part while extending from the second yoke base part. The first yoke base part and the first yoke first extending part are integrally formed without a parting surface being disposed therebetween.SELECTED DRAWING: Figure 1

Provided are: a magnetorheological fluid which has low viscosity when not excited, has good resistance when excited, and has improved lubricity; and a mechanical device. The magnetorheological fluid comprises magnetic particles and a dispersion medium, and the dispersion medium comprises base oil and double-terminal higher fatty acid ester modified silicone oil, and / or side-chain higher fatty acid ester modified silicone oil.

The invention relates to a device (100) comprising a magnetorheological transmission device (10) with two rotating parts (2, 3) which can be moved relative to each other. An annular gap (4) with a magnetorheological medium (5) is formed between the rotating parts (2, 3). A coil device (6) is used to generate a controllable magnetic field in the gap (4). The sensor device (70) is used for acquiring position information and has two sensor units (7), including an active exciter-receiver unit (17) and a passive target unit (27). In this case, one sensor unit (7) is arranged on one rotating part (2, 3) and the other sensor unit (7) is arranged on the other rotating part (2, 3). The gap (4) extends at least in some sections between the sensor units (7).

The application discloses a kind of clutch fan rotation speed abnormality monitoring method, device, equipment and medium.The clutch fan rotation speed abnormality monitoring method includes: obtaining the current operating state of the engine of vehicle, and according to the current operating state of the engine, determine the target fan rotation speed abnormality early warning condition of electric control silicon oil clutch;When the electric control silicon oil clutch fan meets the target fan rotation speed abnormality early warning condition, trigger target timer, and when target timer timing overflow, generate fan rotation speed abnormality early warning signal.The technical scheme of the embodiment of the application can discover fan rotation speed abnormality in time and prompt user, to avoid the closed-loop control failure of electric control silicon oil clutch fan, guarantee user driving safety.

The present invention discloses a drum-disc magnetorheological clutch based on energy recycling, comprising a driving shaft, a driven housing, and a driven shaft, with a driving inner cylinder and a driven inner cylinder disposed within the driven housing. The driving inner cylinder has an annular groove disposed at its right end, and a sleeve is formed in the middle of the bottom of the driven inner cylinder. A magnetorheological fluid is filled in the gap between the driven and driving inner cylinders. Several shape memory alloy springs are distributed around the annular cavity of the driven inner cylinder. The edge of the driven inner cylinder is bent outward and extended to form a flange, which extends between the driven outer cylinder and the right end cap. Several return springs are disposed around the right end of the driven outer cylinder, and under the action of the return springs, the flange is engaged with the bottom of the clearance groove. The present invention combines the advantages of both drum-type and disk-type structures, converting the thermal energy and electromagnetic energy generated during operation into extrusion force to perform work. This not only increases heat dissipation and reduces the influence of temperature on the magnetorheological fluid, but also enhances the extrusion strengthening effect, improving the clutch's force transmission stability and energy efficiency.

To provide a magnetic viscosity fluid device which can form a magnetic path efficiently by reducing magnetic resistance of a yoke.SOLUTION: A magnetic viscosity fluid device 1 includes: a rotary plate 20; a first yoke 30 which faces the rotary plate through a first gap S1; a second yoke 40 which faces the rotary plate through a second gap S2; a magnetic viscous fluid 50 disposed between the first gap and the second gap; and a coil 60. The first yoke and the second yoke have a magnetic flux delivery part 70. The first yoke has: a first yoke base part 31 around which the coil is arranged; and a first yoke first extending part 32. The second yoke 40 has: a second yoke base part 41 disposed at a major surface 22 side of the rotary plate; and a second yoke extending part 42 which forms the magnetic flux delivery part with the first yoke first extending part while extending from the second yoke base part. The second yoke base part and the second yoke extending part are integrally formed without a parting surface being disposed therebetween.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of magnetic powder clutches, and discloses a low-noise magnetic powder clutch which comprises a machine shell, and a first driving shaft is arranged on the right side of the machine shell. According to the low-noise magnetic powder clutch, after the magnet exciting coil is powered on, the magnetic powder braking unit starts to distribute magnetic powder through the first magnetic powder distributing pipeline and the second magnetic powder distributing pipeline, a dotted line closed loop is formed, a magnetic medium in a flowing state starts to be solidified in a magnetic field, and when the magnetic field intensity is large, the magnetic powder almost becomes a solid; meanwhile, magnetic powder particles between the electromagnet and the second driven disc form magnetic linkages, the first driving disc and the electromagnet are connected together, if the current passing through an electromagnet coil is larger, the number of the magnetic linkages is larger, the magnetic linkages are stronger, and when the magnetic linkages are larger and stronger, the torque transmission capacity of the magnetic powder clutch is larger; the vibration absorber can counteract vibration generated in the flux linkage forming process, and the first throttling valve and the second throttling valve control the laying speed of the magnetic powder so as to control noise.

The invention discloses a silicone oil fan clutch for controlling the inclination angle of cooling ribs based on fuzzy logic. The silicone oil fan clutch comprises a clutch shell, the cooling ribs, a track ring, a driven gear, a driving gear, a motor, a temperature sensor, a motor fixing plate, a driving shaft, a driving disc, a working cavity, a valve block and a positioning pin. The temperature sensor collects the temperature of silicone oil in the working cavity in real time, after collected temperature signals are processed through a fuzzy logic control algorithm, target inclination angle parameters and control instructions used for adjusting the heat dissipation ribs are output, and therefore the motor is driven to adjust the inclination angle change of the heat dissipation ribs relative to the clutch shell through the track ring gear transmission set. According to the real-time temperature of the silicone oil in the working cavity, self-adaptive dynamic regulation and control are carried out on the heat dissipation efficiency, and the device has the advantages of being high in applicability, stable and reliable in work, controllable in heat dissipation efficiency and the like.

A telepresence controller is provided for interaction with a remote telepresence session to control haptic interactions between an end effector and the remote telepresence session. Force sensor (s) monitor force (s) applied to an end effector. Position sensor (s) monitor a position of the end effector. The telepresence controller communicates with the remote telepresence session to exchange position data and force data indicative of concurrent haptic movements of the end effector and an object in the remote telepresence session. Magnetorheological fluid clutch apparatus (es ) have an input adapted to be connected to a power source and configured to receive a degree of actuation (DOA) therefrom, the magnetorheological fluid clutch apparatus ( es ) having an output being actuatable to selectively transmit the received DOA to the end effector by controlled slippage. A force controller module determines a force input required on the end effector as a function of haptic events for the object in the remote telepresence session. A clutch driver module drives the magnetorheological fluid clutch apparatus with the controlled slippage being as a function of the force input.

A viscous clutch assembly includes a rotationally fixed center shaft, a rotor rotatably supported on the center shaft, a housing rotatably supported on the center shaft, a working chamber, a reservoir carried by the rotor, an electromagnetic coil located at or near a front end of the center shaft, a valve subassembly magnetically operable to control flow of a shear fluid between the reservoir and the working chamber, a flux guide extending axially across a cover of the housing, and a magnetic flux insulating material positioned adjacent to and radially inward from the flux guide. A flux circuit located forward of the rotor connects the electromagnetic coil and the valve subassembly and passes through the flux guide and the center shaft, with the magnetic flux insulating material at least partially surrounded by the flux circuit.

Bypass device (6) for a torque converter (1), wherein the bypass device (6) is configured to allow or prevent torque transmission from a front cover (2) to a turbine wheel (4) of the torque converter (1), the bypass device (6) comprising: a coupling area (24) arranged between the front cover (2) and the turbine wheel (4), the coupling area (24) comprising a plurality of coupling plates (28, 29a, 29b) and a piston (30) for pressing the coupling plates (28, 29a, 29b) together, the coupling area (24) being configured to allow or block the transmission of torque; and a damping mechanism (25) configured for transmitting torque from the coupling area (24) to the turbine wheel (4) and for absorbing and damping torque vibration, wherein the damping mechanism (25) comprises: an input side element (44, 44', 55) into which the torque from the coupling area (24) is introduced; an output side element (45) that is connected to the turbine wheel (4); a plurality of elastic elements (46) which elastically connect the input side element (44, 44', 55) and the output side element (45) in a direction of rotation; an intermediate element (47, 47') that causes at least two of the plurality of elastic elements (46) to act in series, wherein the intermediate element (47, 47') can rotate relative to the input side element (44, 44', 55) and the output side element (45); and a limiting element (48, 54, 58) that prevents the intermediate element (47, 47') from moving in both the radial and axial directions, wherein the limiting element (48, 54, 58) is mounted on the inlet side element (44, 44', 55), wherein the limiting element (48, 54, 58) is attached at its inner circumferential region to the input side element (44, 55) of the damping mechanism (25), wherein the limiting element (48, 54, 58) has at its outer circumferential region a radial limiting region (48b, 54a, 58b) and an axial limiting region (48c, 54b, 58c), wherein the radial limiting region (48b, 54a, 58b) prevents the intermediate element (47, 47') from moving in the radial direction by supporting an inner circumferential end of the intermediate element (47, 47'), and wherein the axial limiting region (48c, 54b, 58c) prevents the intermediate element (47, 47') from moving axially, wherein the plurality of elastic elements (46), the intermediate element (47, 47') and both the radial limiting area (48b, 54a, 58b) as well as the axial limiting area (48c, 54b, 58c) of the limiting element (48, 54, 58) are arranged on an outer circumferential side of the coupling area (24).

A kit (30) for use with a drivetrain of a rotatable assembly includes a tapered bushing (32), a tapered adapter (34), and a bushing lock (36). The tapered bushing includes a flange (32-1), a sleeve portion (32-2), a central opening (32C), a keyway (32-3) located along the central opening, at least one fastener hole (32-1F), and a tapered mating surface (32F) facing outward. The tapered adapter includes a hub body (34-1) with an end face portion (34-1E), an interior cavity (34-2), a threaded shaft (34-3), at least one fastener hole (34-4B) extending substantially axially through the hub body, and a tapered mating surface (34M) facing inward. The fastener hole(s) of the tapered adapter and tapered bushing are configured to align. The bushing lock includes a bushing lock central opening (36-1) extending axially, a keyway (36-3) located along the bushing lock central opening, and a fastener hole (36-2) extending substantially radially.

The invention relates to an apparatus (100) comprising a magnetorheological transmission device (10) having two rotary components (2, 3) that are movable relative to one another. Formed between the rotary components (2, 3) is an encircling gap (4) with a magnetorheological medium (5). A coil device (6) is used to generate a controllable magnetic field in the gap (4). A sensor device (70) is used to sense position information and has two sensor units (7), comprising an active exciter-receiver unit (17) and a passive target unit (27). One sensor unit (7) is arranged on one rotary component (2, 3) and the other sensor unit (7) is arranged on the other rotary component (2, 3). The gap (4) extends at least partially between the sensor units (7).