48 results about "Rotational vibration" patented technology

The invention provides a reliability evaluation system and method for a two-degree-of-freedom rotational vibration energy collector, and belongs to the field of nonlinear rotational vibration energy collection, and the method comprises the steps: S1, constructing a kinetic model, and converting the kinetic model into a Hamiltonian form; s2, reducing dimensions by adopting a random average method; s3, calculating a drift coefficient and a diffusion coefficient; s4, constructing and solving a boundary value problem to verify the calculation precision; and S5, parameter sensitivity analysis and design optimization. According to the reliability evaluation system and method for the two-degree-of-freedom rotary vibration energy collector, the problems that in reliability analysis of an existing two-degree-of-freedom rotary vibration energy collector, high-dimensional coupling characteristics are difficult to capture, an analysis frame is incomplete, calculation efficiency is low, and parameter optimization lacks theoretical guidance are solved.

A motor control method for an oral care device and a related apparatus thereof. The oral care device comprises a motor (120). The motor (120) comprises a mover (301). The motor control method comprises: acquiring a driving signal, controlling, on the basis of the driving signal, the reciprocating vibration of the mover (301) relative to a reference axis, and controlling the position of the reference axis to change, so as to increase the coverage range of the vibration, wherein the vibration includes linear vibration or rotary vibration, and the driving signal is a predetermined signal. The coverage range of the vibration of the mover (301) is significantly improved. As a result, the oral cleaning effect is improved.

The application discloses a glass plate weighing system along with a line, which comprises a conveying roller, a weighing mechanism arranged above the conveying roller, a vertical moving mechanism, a suction cup connected to the bottom of the vertical moving mechanism, a pressure sensor arranged between the suction cup and the vertical moving mechanism, a vertical moving winch and a pull rope, a pull frame fixed to the bottom of the pull rope, the pressure sensor arranged on the pull frame, a horizontal plate arranged on the top of the suction cup and placed on the pressure sensor, a driving mechanism connected to the suction cup and used for extracting or injecting air in the suction cup. The glass plate weighing system along with the line has the beneficial effect that the glass plate is lifted and weighed, the weighing efficiency is ensured, the measurement accuracy is not affected by falling ash, slag and the like, and the measurement accuracy is not affected by the rotation vibration of the roller.

The invention relates to the technical field of stirring paddles, in particular to a uniform mixing bioreactor stirring paddle which comprises a column body, the rotating shaft is rotationally connected into the column body; through the innovative composite design of a double-layer differential transmission mechanism and vibration stirring, three-dimensional chaotic mixing is realized, and the mixing efficiency and quality are remarkably improved; the upper-layer first rotating mechanism drives a plurality of first stirring paddles to rotate at a set speed through a gear train formed by a first gear ring, a first gear and a second gear ring; the second rotating mechanism at the lower layer drives a second stirring paddle through another independent gear system, slides in a corrugated groove with a specific angle through a T-shaped block, and generates periodic radial vibration in combination with an elastic component; the rotation-vibration composite motion breaks the flow field symmetry of traditional one-way stirring, can effectively eliminate a mixing dead zone, enables nutrient substances, dissolved oxygen and cells to be highly uniformly distributed, and is especially suitable for a high-density and high-viscosity culture system.

This invention proposes a demolding device, comprising a first cavity, a first vibrating element, and a first colliding element. The first colliding element is located within the first cavity, and the first vibrating element drives the first colliding element to bounce within the first cavity and collide with the material inside the first cavity. The demolding device of this invention, through the bouncing of the first colliding element within the first cavity, causes the first colliding element to collide with the material inside the first cavity, thereby separating the zipper head from the frame. This effectively avoids the mutual collision and wear of the zipper heads caused by rotational vibration demolding methods. Furthermore, this demolding device can be adapted to various conveying components, and is simple in structure and efficient.

The rotary vibration material heat treatment device comprises a sleeve, a vibration module, a rotation module and a sample table, the vibration module and the rotation module are arranged in the sleeve, and the output ends of the vibration module and the rotation module extend out of the sleeve to be connected with the sample table; the rotating module comprises a rotating driving assembly, a first rotating assembly, a second rotating assembly and a third rotating assembly, the output end of the rotating driving assembly is connected with the first rotating assembly, the first rotating assembly is connected with the third rotating assembly through the second rotating assembly, and the sample table is arranged on the third rotating assembly; the second rotating assembly comprises a supporting ring, a male ring buckle, a female disc buckle, a second support and an eccentric correction structure. The device has the advantages that the device can be mounted in a compact high-intensity magnetic field environment; after eccentricity occurs during rotation, real-time compensation of dynamic eccentricity can be realized under the action of the eccentricity correction structure, and eccentricity during rotation is prevented, so that rotation stability is ensured.

The invention discloses a brushless direct current vibration motor, and relates to the technical field of motor equipment. Comprising a motor body, continuous rotation is converted into instantaneous pulse impact through meshing of an inner ratchet ring, a tooth block and a pawl, high-quality and high-strength click type tactile feedback is generated and far exceeds the rotating vibration texture of a traditional ERM motor, a centrifugal clutch is formed by a first spring and a first telescopic rod, and the motor body is driven by the first telescopic rod to rotate. By means of the structure, strong impact can be generated only at the high rotating speed, decoupling of the vibration strength and the rotating speed is achieved, false triggering impact at the low speed is effectively buffered, the mechanism is protected, and a mechanical buffering layer is built between the movable block and the rotor body through the limiting assembly. The impact force and noise generated when the movable block is thrown out and withdrawn and collides with the body are greatly reduced, the problems of material fatigue and damage caused by inertial collision are effectively solved, the durability of the impact mechanism is remarkably improved, and the service life of the impact mechanism is remarkably prolonged.

The invention discloses a rotary vibration test measuring device and a rotary vibration test measuring method, and belongs to the technical field of oil and gas development direction measuring instruments, the rotary vibration test measuring device comprises a rotary vibration measuring electrical output device, a rotary vibration measuring platform, a rotary transmission mechanism and a rotary supporting mechanism; the rotary vibration measurement electrical output equipment is used for outputting axial rotary power and transmission signals when the actual underground working condition is simulated in the rotary vibration test measurement process; the rotary vibration measurement platform is used for supporting the rotary vibration measurement electrical output equipment, the rotary transmission mechanism and the rotary supporting mechanism; the rotation transmission mechanism is used for transmitting energy and power output by the rotation vibration measurement electrical output equipment to the whole system; the rotation supporting mechanism is used for balancing the rotation vibration measurement electrical output device and the rotation transmission mechanism on the same horizontal plane. The device is used for carrying out actual underground working condition simulation on the data acquisition unit before the device descends into a well.

The invention discloses a device for monitoring vibration and temperature of equipment, which comprises a self-adaptive sleeve shaft mounted on a rotating shaft of driving equipment and a vibration sensor mounted on the outer side of the self-adaptive sleeve shaft, and the self-adaptive sleeve shaft can keep a static state independent of the rotating shaft of the driving equipment. The vibration sensor is used for monitoring vibration amplitude of a rotating shaft of driving equipment; a temperature sensor is mounted on the self-adaptive sleeve shaft and is used for monitoring the temperature of a rotating shaft of the driving equipment; the vibration sensor and the temperature sensor are connected with a central processing system, and the central processing system is used for receiving an output signal of the vibration sensor and an output signal of the temperature sensor and giving an alarm when the vibration amplitude and the temperature of a rotating shaft of the driving equipment exceed set threshold values; when the rotary vibration of the driving equipment is measured, friction cannot be generated on the sensing surface of the vibration sensor, and the service life of the vibration sensor is prolonged.

This invention relates to the field of pipe pile disassembly and assembly technology, and in particular to an end plate nut disassembly and assembly mechanism and an end plate disassembly and assembly machine. The end plate nut disassembly and assembly mechanism includes: a mounting frame, on which a base plate is rotatably connected, and the base plate is provided with several frames; a rotating device for driving the base plate to rotate; a disassembly and assembly device, which includes a position adjustment component, a sleeve, and a drive component; an adaptive clamping device, which includes a snap-fit ​​block and an adaptive compensation component; and a fixing device, which includes an adsorption component, a vibration triggering component, and an anti-loosening component. This invention achieves automatic centering during the nut insertion stage through the cooperation of the snap-fit ​​block and the compensation component, and forms a dynamic clamping enhancement mechanism with the vibration triggering anti-loosening component, effectively avoiding stripping and detachment; at the same time, the adsorption component and the snap-fit ​​block provide initial clamping force, and the anti-loosening component automatically strengthens the clamping when rotational vibration is detected.

The invention relates to the technical field of drilling well deviation simulation, in particular to a rotary vibration simulation device, which is used for solving the problem that the influence of a drilling environment on a measuring device is not easy to verify, and comprises a base, an angle table is mounted on the base, a motor is fixedly connected to the angle table, and a PCB (Printed Circuit Board) to be tested is mounted at the output end of the motor; a first inserting rod and a second inserting rod are inserted into the two ends of the base respectively, a first inserting hole matched with the first inserting rod is formed in one end of the angle table, and a plurality of angle adjusting holes matched with the second inserting rod are formed in the other end of the angle table and the other end of the base. A first conical ring is arranged at one end of the second insertion rod, and a second conical ring is slidably connected to the other end; the device can simulate the drilling state, facilitates the understanding of the measurement error of the measurement device in the state, and provides a reference for drilling parameters.

This device provides a vibration power generation device that generates high electromotive force by causing the air gap of the magnetic circuit to change more significantly and rapidly than in conventional devices. [Solution] The vibration power generation device 10 comprises a magnetic circuit 11 in which a magnetic flux capturing part 15 or magnetic flux leakage part 13 provided at one end of a first magnetic material member 12 and a magnetic flux leakage part 13 or magnetic flux capturing part 15 installed at one end of a second magnetic material member 14 face each other with an air gap 21 in between, and the other ends of the first magnetic material member 12 and the second magnetic material member 14 are connected via a support shaft 16, thereby enabling relative rotation around the support shaft 16; a vibration transmission device 18 having a vibration receiving part 24 at one end and the other end fixed to the first magnetic material member 12; a coil 20 wound between the magnetic flux leakage part 13 or magnetic flux capturing part 15 of the second magnetic material member 14 and the support shaft 16; and an elastic body 22 configured to exert a restoring force in the direction that narrows the air gap 21 when an attempt is made to widen it.

The invention relates to the technical field of flaw detection, and discloses a high-altitude pipe gallery flaw detection method and system based on unmanned equipment and a storage medium, and the method comprises the following steps: in response to a radiographic inspection instruction, controlling a ray emission assembly to emit rays, and controlling a ray imaging assembly to generate a ray image; the radiographic inspection structure is controlled to rotate around the high-altitude pipe gallery by one circle on the holding structure; acquiring a plurality of rotational vibration data, calculating to obtain an acquired vibration value, if the acquired vibration value is greater than the acquired reference vibration value, calculating an acquired vibration comparison value, and adjusting the first rotational speed according to positive correlation of the acquired vibration comparison value; the enclasping structure is controlled to move to the translation length in the high-altitude pipe gallery; collecting a plurality of translational vibration data, calculating to obtain a translational vibration value, if the translational vibration value is greater than a translational reference vibration value, calculating a translational vibration contrast value, and adjusting the first movement speed according to negative correlation of the translational vibration contrast value; and the flaw detection accuracy of the high-altitude pipe gallery is improved.

The invention relates to the technical field of deburring machining of parts, in particular to a rotary vibration grinding device and method.The device comprises a rotary assembly, a support assembly, a vibration assembly and a clamp assembly, and the fixed end of the rotary assembly is fixedly connected with the support assembly; the output end of the rotating assembly is connected with the clamp assembly to drive the clamp assembly to rotate, the vibration assembly is provided with a vibration chamber capable of containing grinding auxiliary materials, the clamp assembly is used for clamping a to-be-machined part to be located in the vibration chamber, and the to-be-machined part of the to-be-machined part can make contact with the grinding auxiliary materials. And the grinding auxiliary materials can generate collision rolling and micro grinding with burrs of the to-be-machined part, so that the purposes of improving the surface quality and removing the burrs are achieved. Due to the fact that the to-be-machined part can be driven by the rotating assembly to rotate, relative movement between the grinding auxiliary material and the to-be-machined part is promoted, and therefore the efficiency and quality of deburring and part grinding and polishing are improved.

The invention discloses an intelligent vibrating mechanical device for layered and segmented pouring of concrete and a control method. The intelligent vibrating mechanical device comprises a formwork set, a vibrating mechanism and a winding mechanism. The formwork set is composed of a plurality of pouring formworks, transparent fixing grooves are formed in the pouring formworks, monitoring boxes matched with the fixing grooves are fixed in the fixing grooves, and a plurality of sensors are arranged in the monitoring boxes. According to the invention, an intelligent vibrating system integrating real-time state sensing, autonomous moving and directional vibrating capabilities is integrated; the system is composed of three parts: 1, an intelligent sensing template group: a monitoring box provided with an ultrasonic and vibration sensor array is embedded in a key position of a template to form a sensing network; 2, the intelligent vibrating mechanism is an execution terminal which can move in concrete by rotating spiral blades and is provided with a vibrator capable of rotating by 360 degrees; the central control system is used for receiving data of the sensor, making a decision and controlling the movement and the vibrating behavior of the vibrating mechanism.

This application relates to the field of air conditioner technology, specifically, it provides a bushing and an air conditioner having the same. The bushing includes a mounting base, a bearing body, and an elastic element. The mounting base has a mounting hole; the bearing body is located within the mounting hole and has a shaft hole; the elastic element is disposed within the mounting hole and includes a first part connected to the bearing body and a second part connected to the mounting part. At least two elastic elements are provided to support the bearing body. This invention provides a method where the shaft hole engages with one end of a cross-flow fan blade to support the fan blade. The elastic element allows for better connection with the fan blade after assembly, reducing the transmission of rotational vibration during fan blade rotation. The elastic element connects the bearing body and the mounting base, improving the installation efficiency and accuracy of the bearing body. The use of at least two elastic elements enhances the reliability of the connection between the bearing body and the mounting base.

The application discloses an experimental device and method for researching high-speed instability interval of rotor oil liquid, and the experimental device comprises a frame, a rotating shaft, an oil tank, a first bearing, a second bearing, a storage plate, a plurality of partition plates and a processor; a circular hole is formed in the middle of the top plate and the storage plate, the first bearing and the second bearing are respectively installed in the circular hole of the top plate of the storage plate and the frame through a first bearing seat and a second bearing seat; the rotating shaft vertically penetrates the first bearing and the second bearing from top to bottom, is connected with the oil tank between the storage plate and the bottom plate, and rotates horizontally under the action of a motor; the plurality of partition plates are detachably and evenly distributed and installed in the oil tank, one end of the partition plate is connected with a stand column located in the center of the oil tank, the other end is connected with the inner side of the oil tank, and the oil tank is evenly separated into a plurality of sub-regions. The application can effectively simulate the vibration phenomenon of the oil liquid under the condition of the baffle, the baffle is convenient to assemble and disassemble, and is suitable for the research on the oil liquid rotary vibration of the rotor dynamics.

The application discloses a rotating vibration material heat treatment device for a strong magnetic field, which comprises a sleeve, a vibration module, a rotating module and a sample table. The vibration module and the rotating module are arranged in the sleeve, and the output ends of the vibration module and the rotating module extend out of the sleeve and are connected with the sample table. The rotating module comprises a rotating driving assembly, a first rotating assembly, a second rotating assembly and a third rotating assembly. The output end of the rotating driving assembly is connected with the first rotating assembly. The first rotating assembly is connected with the third rotating assembly through the second rotating assembly. The sample table is arranged on the third rotating assembly. The second rotating assembly comprises a supporting ring, a male ring buckle, a female disc buckle, a second support and an eccentricity correction structure. The device can be installed in a compact strong magnetic field environment. After the rotation is eccentric, the dynamic eccentricity can be compensated in real time under the action of the eccentricity correction structure, the eccentricity during the rotation is prevented, and the stability of the rotation is ensured.

The invention belongs to the technical field of noise reduction of underwater vehicles, and provides a vibration isolation device for a stern propulsion motor of an underwater vehicle, the vibration isolation device comprises a connecting ring assembly, the connecting ring assembly is fixedly connected with the underwater vehicle through two groups of axial vibration reduction assemblies, and the axial vibration reduction assemblies are used for reducing vibration of the propulsion motor in the advancing direction of the underwater vehicle; the radial vibration isolation assembly comprises a first fixing ring seat fixedly connected in the connecting ring assembly, a vibration reduction mechanism is arranged in the first fixing ring seat, and the vibration reduction mechanism is used for reducing vibration of the propulsion motor deviating in the radial direction; and the deflection vibration isolation assembly comprises a third fixing ring seat fixedly connected to the vibration reduction mechanism, the third fixing ring seat is connected with the vibration reduction mechanism through a deflection vibration isolation mechanism, and the deflection vibration isolation mechanism is used for reducing rotation vibration of the propulsion motor in the axis direction. Axial vibration, radial vibration and vibration in the advancing direction generated when the propulsion motor works can be effectively weakened and isolated.

The utility model discloses a flexible ring feeding device, and belongs to the technical field of valve assembling equipment. The feeding device comprises a rotary vibration disc, a discharging guide rail and a discharging linear vibration feeder, the discharging guide rail is arranged at the discharging end of the rotary vibration disc, the discharging linear vibration feeder is installed on the discharging guide rail, a plurality of suction holes are formed in the discharging guide rail and used for being connected with a vacuum device, and the discharging guide rail applies adsorption force to a flexible ring through the suction holes. The discharging linear vibration feeder enables the flexible ring on the discharging guide rail to move in the direction away from the rotary vibration disc. According to the flexible ring feeding device, the flexible ring is adsorbed through the suction holes of the discharging guide rail, the probability that the flexible ring is stripped from the discharging guide rail is reduced, vibration which is applied to the flexible ring on the discharging guide rail and moves in the direction away from the rotary vibration disc is combined with the discharging linear vibration feeder, and the feeding efficiency of the flexible ring is improved; the problem that in the prior art, the flexible ring feeding efficiency is low is solved.

The application relates to the technical field of engineering construction equipment, in particular to a screw anchor screwing device and a piling method, wherein the screw anchor screwing device comprises a screw anchor body, the screw anchor body is connected with a plurality of anchor discs, a screwing assembly is used for driving the screw anchor body to rotate, a high-frequency vibration assembly is used for driving the screw anchor body to produce rotational vibration around the axis of the screw anchor body, an anchor disc adjusting assembly comprises an output mechanism and an air pressure opening and closing mechanism, and a resistance reducing assembly comprises a recovery mechanism and a release mechanism. In the application, the high-frequency vibration assembly can effectively reduce the frictional resistance between the soil and the anchor disc of the anchor rod, the anchor disc adjusting assembly can effectively break hard soil blocks around the anchor disc during use, the resistance reducing assembly can recycle the air of the anchor disc adjusting assembly and release the air into the gaps around the screw blade, and the friction between soil particles is reduced.

The invention discloses a preparation method of an anti-abrasion combined test piece. The preparation method comprises the following specific steps: step 1, manufacturing a plurality of concrete anti-abrasion round disc test piece semi-finished products; 2, a plurality of blind holes are formed in the surface of each concrete anti-erosion round disc test piece semi-finished product through a hole depth adjusting device, and a concrete anti-erosion round disc test piece is obtained; step 3, preparing a pouring material; step 4, fixing the concrete anti-impact round disc test piece on a rotary vibration device, pouring a pouring material into each blind hole, and starting the rotary vibration device to perform rotary mixing to complete pouring; and step 5, curing and polishing the poured concrete anti-abrasion disc test piece to obtain the anti-abrasion combined test piece. The method provided by the invention solves the problem of non-uniform material distribution of the existing composite material test piece.

A vibration type actuator includes a vibrator including a protruding portion and a piezoelectric element, the vibrator being configured to vibrate in response to a voltage, and a contact member having a contact surface in contact with the protruding portion. The vibrator and the contact member are rotated relative to each other about a first axis. The vibrator is inclined to the contact surface by a predetermined angle.

To identify a micro-mechanical coupling device or ring gyroscope that suppresses translational mode excitation while simultaneously saving installation space compared to known solutions. [Solution] A micro-electromechanical coupling device (100) for coupling micro-electromechanical components, comprising: a flexible ring structure (110) that forms a circle when stationary and is deformable substantially parallel to the plane of the circle and is suitable for coupling the micro-electromechanical components; and a plurality of spring elements (120) suitable for connecting the ring structure (110) to a substrate (200), each spring element (120) comprising: at least one tangential spring (122) that is displaceable substantially tangentially with respect to the ring structure (110); and at least one radial spring (124) that is displaceable substantially radially with respect to the ring structure (110); The spring element (120) has independent components for the tangential spring (122) and the radial spring (124), and the ratio of the spring stiffness of the tangential spring (122) and the radial spring (124) of each spring element (120) is configured such that the vibration that deforms the ring structure (110) is more energetically advantageous than the vibration that displaces the ring structure (110) with respect to the substrate (200) in translation and / or rotation, and / or the natural frequency of the translation and / or rotational vibration and the nearest natural frequency of the deformation vibration are separated by more than 5% of the natural frequency of the deformation vibration.

The application discloses a motor control method of an oral care device and a related device. The motor includes a mover, and the method comprises: obtaining a driving signal; the driving signal comprises a plurality of sweep signals, each of the sweep signals comprises a plurality of vibration signals; based on a high level of the vibration signal, the mover is controlled to move in a first direction, and based on a low level and / or a reverse high level of the vibration signal, the mover is controlled to move in a direction opposite to the first direction, to reciprocate relative to a reference axis; the vibration includes linear vibration or rotary vibration; based on the sweep signal, the mover is controlled to vibrate, and the position of the reference axis is changed to form sweep, so as to increase the coverage range of the vibration. In this way, the coverage range of the vibration of the mover is significantly improved, and the oral cleaning effect is improved.

The utility model provides an automobile part wading performance testing device, which comprises a box body, a water storage bag, a turntable, a driving part and a vibration part, an opening is arranged at the bottom of the box body, and the water storage bag is arranged in the box body; the rotating shaft is rotatably inserted into the top of the box body; the lower end of the rotating shaft extends into the water storage bag; the turntable is arranged at the lower part in the water storage bag, and the upper surface of the turntable is fixedly connected with the lower end of the rotating shaft; the driving part is connected with the upper end of the rotating shaft for driving the rotating shaft to rotate; the vibration part penetrates through the opening from the outside of the box body to make contact with the bottom of the water storage bag and press the rotary disc. The driving part is used for driving the tested piece to rotate, so that the tested piece and water generate relative motion to simulate water flow impact. The vibration component is used for providing vibration excitation for the tested piece and simulating vibration caused by a bumpy road surface and operation of a motor or an engine. The test device can simulate the problem of insufficient waterproof performance caused by vibration caused by road conditions and self-driving in the dynamic and static wading process of the vehicle.

The invention belongs to the technical field of rotary vibration measurement, particularly relates to a rotary mechanical vibration measurement device, and provides the following scheme aiming at errors caused by non-vertical contact between a handheld vibration meter and an arc-shaped surface during rotary mechanical vibration measurement: the rotary mechanical vibration measurement device comprises a measurement table, and the upper side of the measurement table is fixedly connected with a chute frame. According to the rotary mechanical vibration measuring device disclosed by the invention, measurement is carried out in a mode of mechanically clamping and fixing the vibration meter through the two centering plates and the two mounting plates by utilizing the self-positioning measuring assembly, and meanwhile, the vibration meter is always centered, positioned and clamped through the two centering plates; therefore, the probe of the vibration meter is always in vertical contact with the tangent line of the measuring arc-shaped surface of the rotating machine before and after measurement, and the situation that the actual vibration state of the machine cannot be truly reflected due to the fact that vibration energy received by the probe is attenuated or distorted due to non-vertical contact is avoided. And the effectiveness of predictive maintenance is improved while the measurement accuracy is ensured.

The application discloses a blisk multi-tool rough-fine integrated pulsating electrochemical machining machine tool, and relates to the technical field of electrochemical machining, which comprises a machine tool body, wherein the machine tool body comprises a base, a left stand column, a right stand column and a middle stand column; a workpiece movement platform is installed on the middle stand column; the workpiece movement platform comprises a workpiece vertical movement platform; the workpiece vertical movement platform is connected with a workpiece rotary workbench; and the rotary end of the workpiece rotary workbench is used for fixing a blisk workpiece; an upper tool beam and a lower tool beam are arranged between the left stand column and the right stand column; the lower tool beam is connected with a tool vertical movement platform; the upper tool beam is connected with an upper tool disc through an upper rotary vibration device; the lower tool beam is connected with a lower tool disc through a lower rotary vibration device; the lower surface of the upper tool disc is circumferentially and uniformly provided with a plurality of blade back electrodes and a plurality of tube electrodes; and the upper surface of the upper tool disc is circumferentially and uniformly provided with a plurality of blade basin electrodes. The application simplifies the overall blisk machining process, and has high machining precision and work efficiency.

A polygonal coupling couples a torque source to a torque consumer such that the input and output portions of the coupling can elastically rotate relative to one another to accommodate changes in rotational speed as the torque source delivers torque. In one embodiment, the torque source is an internal combustion engine with an integrated switchable coupling between the engine crankshaft and a torque delivery segment that supports an electric motor generator. The polygonal coupling includes axially overlapping polygonal male and female portions that mate to deliver torque between the output of the integrated switchable coupling and the input of the torque delivery segment. At least one of the male and female portions includes a recess that forms flexible arms adjacent to the lobes of the polygonal shape, allowing the portions to rotate relative to one another over a small angular displacement, thereby increasing the damping of crankshaft rotational vibrations.

The present invention relates to a differential device that suppresses rotational runout of a differential case and reduces gear noise at a meshing portion of a ring gear. In a differential device (1), a pair of side gears (10a, 10b) that face each other on the rotational center axis of a differential case (3) are disposed inside the differential case (3), a ring gear (8) is integrally provided on the outer periphery of the differential case, and pinion gears (11a, 11b) that mesh with the side gears are disposed between the side gears. A pinion shaft (12) disposed in a direction orthogonal to the rotational center axis passes through the pinion and rotatably holds the pinion, and an end portion of the pinion shaft is supported by a differential case having a through-hole into which the end portion of the pinion shaft is inserted, the end portion of the pinion shaft being press-fitted into the through-hole, and the end portion of the pinion shaft being press-fitted into the through-hole. The pinion shaft has a protruding portion that protrudes from the through hole to the outside of the differential case, and the protruding portion becomes an expanded portion (15a, 15b) that is larger than the inner diameter of the through hole.