Abstract: Provide is a power transmission device lubricating structure capable of preventing air from being mixed with a lubricating fluid while suppressing a resistance applied from the lubricating fluid to a rotation body in a casing. A lubricating structure includes a strainer which includes a suction port and partition members which divide an inner space of a transmission casing. The partition members define a differential room accommodating a final driven gear and a strainer room accommodating the strainer and communicating with the differential room at an upper portion thereof.

Abstract: Provided is a lubricating fluid supply structure of a power transmission device capable of stably supplying a lubricating fluid to a built-in part to which the lubricating fluid is supplied with a high priority. A supply pipe (64a) includes a first main pipe line (L1) connected to a priority part, a second main pipe line (L2) connected to a non-priority part, and an intermediate pipe line (LM) connecting the first main pipe line (L1) and the second main pipe line (L2) to each other. A first height (H1) of a connection part of the first main pipe line (L1) connected to the intermediate pipe line (LM) is lower than a second height (H2) located at the highest position in a flow path bottom surface of the intermediate pipe line (LM).

Abstract: Provided is a casing of a power transmission device which is capable of preventing a position of a gasket from being displaced without performing a complicated assembling process while suppressing an increase in a size of the entire power transmission device. A gasket (63) interposed between a TC side case member (61) and a TM side case member (62) has a first held portion (63a) which extends toward an inside of the TM side case member. A discharge mechanism (64) fixed to the TM side case member (62) has a first holding portion (64a1) which comes into contact with the first held portion (63a) from the TC side case member (61) side. The gasket (63) is held by the TM side case member (62) by sandwiching the first held portion (63a) between the TM side case member (62) and the first holding portion (64a1).

Abstract: Provided is a flow path structure of a power transmission device which is capable of removing gas from a lubricating fluid guided to a fluid reservoir while suppressing an increase in a size of the entire power transmission device. A gasket (63) has an extending portion which extends toward an inside of a transmission case (31). A flow path (70) which extends from an upper portion to a lower portion and guides lubricating oil discharged from a discharge mechanism (64) to an oil reservoir is formed inside the transmission case (31) using the extending portion. The discharge mechanism (64) discharges the lubricating oil toward an inner surface of the flow path (70).

Abstract: An arc welding system includes an arc welding portion that executes an arc welding, an arc welding power supply that supplies a weld voltage and a weld current to the arc welding portion, an analyzer including analyzer circuitry that performs a frequency analysis on a time series waveform of at least one of the weld voltage and the weld current and generates frequency spectral data, and a determiner including determiner circuitry that obtains a welding state of a welding work by the arc welding portion based on the frequency spectral data generated by the analyzer.

Abstract: A parking mechanism for a vehicle includes an automatic transmission, a parking gear, a parking pawl, and a parking-pawl turn member. The parking gear is fixed to a part formed by any of an output shaft of the automatic transmission and an intermediate member connected to the output shaft. The parking pawl is turnably attached to a turn shaft that is supported by a plate fastened to a transmission case by a first bolt and a second bolt. The parking-pawl turn member turns the parking pawl into engagement with the parking gear. An extending part formed by extending a support member that turnably supports the part of the automatic transmission is substituted for the plate. The extending part is fastened to the transmission case by the first bolt.

Abstract: A parking mechanism for a vehicle includes an automatic transmission, a parking gear, a parking pawl, and a parking-pawl turn member. The parking gear is fixed to a part formed by any of an output shaft of the automatic transmission and an intermediate member connected to the output shaft. The parking pawl is turnably attached to a turn shaft that is supported by a plate fastened to a transmission case by a first bolt and a second bolt. The parking-pawl turn member turns the parking pawl into engagement with the parking gear. An extending part formed by extending a support member that turnably supports the part of the automatic transmission is substituted for the plate. The extending part is fastened to the transmission case by the first bolt.

Abstract: A piezoelectric film device has a piezoelectric film element and a power supply circuit. The piezoelectric film element is formed of a first electrode, a second electrode, and a piezoelectric film that is sandwiched between the first electrode and second electrode and has a polarization vector in the film thickness direction. The polarization vector is inverted by application of a predetermined voltage or higher through the first electrode and second electrode. The power supply circuit supplies voltage for inverting the polarization vector. The piezoelectric film has each different lattice constant depending on the direction of the polarization vector. The piezoelectric film device keeps a different displacement position corresponding to the direction of the polarization vector even when the voltage application is stopped.

Abstract: In a disclosed method, a piezoelectric element 1 has an asymmetrical hysteresis characteristic of polarization-electric field different in absolute values between a coercive field of positive electric side and a coercive field of negative electric field side, and is polarized in the film thickness direction of the piezoelectric element 1 and in a direction of smaller absolute value of the coercive field, and as a position control voltage Q1 for position control by ditorting the piezoelectric element 1 in a direction orthogonal to the film thickness direction of the piezoelectric element 1, a voltage equivalent to an electric field of 0.4 or less of the coercive field value is applied in the film thickness direction of the piezoelectric element 1 in a direction of larger absolute value of the coercive field.

Abstract: A position control device has a piezoelectric actuator, a power supply for applying voltage to the piezoelectric actuator, a position control unit, and a reverse low voltage control unit. The position control unit identifies a position control state in which position control is performed by displacing the piezoelectric actuator and a standby state that does not require the position control, and controls the position. When the position control unit identifies the standby state, the reverse low voltage control unit sets a reverse low voltage that is directed opposite to the polarization direction of the piezoelectric film and is lower than a coercive voltage and a set time during which the reverse low voltage is applied, and transmits a power supply control signal for generating the set reverse low voltage and set time to the power supply. Thus, a large displacement amount is achieved and a long lifetime can be realized.

Abstract: In a manufacturing method for a piezoelectric actuator a first electrode layer is formed on substrate, a ferroelectric thin film is formed on the first electrode layer, and an inorganic protective layer 4 is formed on the ferroelectric thin film. Then, the inorganic protective layer 4 and the ferroelectric thin film are heat-treated under an oxygen containing atmosphere, and a second electrode layer is formed on an oxidation diffusion layer, wherein the oxidation diffusion layer is formed on a surface of the ferroelectric thin film as a result of component diffusion of the ferroelectric thin film and oxidation of the inorganic protective layer 4 due to the heat treatment. By using this method, it is possible to improve ferroelectricity without deterioration or cracking of a surface of the ferroelectric thin film.

Abstract: A piezoelectric device includes a first electrode film, a second electrode film, and a piezoelectric thin film enclosed by the first electrode film and second electrode film, in which the piezoelectric thin film is an oxide piezoelectric thin film having an oxygen deficiency amount of more than 0% and not more than 10% of the stoichiometric composition. The piezoelectric device composed of the piezoelectric thin film having such oxygen deficiency has a greater piezoelectric performance as compared with the oxide piezoelectric thin film in an oxidized state of stoichiometric composition, and by manufacturing under such a condition, the film forming speed is increased, so that the mass producibility can be improved.

Abstract: To provide a piezoelectric thin-film element small in leak current between electrode metal films and its manufacturing method are presented, the piezoelectric thin-film element includes at least one unit laminated body composed of a piezoelectric thin-film having a mutually facing first surface and second surface, a first electrode metal film on the first surface, and a second electrode metal film on the second surface, in which an electrode separation surface composed of a piezoelectric thin-film surface parallel to the first surface is provided between the first electrode metal film and second electrode metal film.