35results about How to "Accurate control positioning" patented technology

The invention relates to a machine for making bored piles. The machine comprises a vertical guide mast; a rotary drive head that is movable relative to the mast; an auger having a hollow core and at least one helical blade; an extender tube whose bottom end is secured to the top end of the auger, said drive head co-operating with said extender tube to rotate both the extender tube and the auger; a dip tube slidably mounted in the hollow core of the auger and the extender tube, the dip tube having a top end connected to a concrete feed pipe; and an annular actuator having a first end secured to the top end of said extender tube and a second end secured to the top end of said dip tube.

A steering unit for a vehicle, notably a bus. The steering unit is coupled with a suspension system and comprises: a support formed by a passenger platform and a wheel housing, a longitudinal axis, a steering knuckle with an in-wheel engine defining a transversal rotation axis which is arranged transversally with respect to the longitudinal axis, an actuator mechanism adapted for pivoting the steering knuckle. The steering knuckle further comprises a lever which is linked to the actuator mechanism and which includes a transversal portion extending transversally along the in-wheel engine. The steering unit is adapted for an articulated bus with at least two bodies, said bodies each exhibits four or eight identical and independent steering units.

The invention discloses an auxiliary welding tool fixture of a T-shaped connector laser welding robot for aluminum alloy sheets. The fixture includes a framework, one end of the framework is providedwith an end plate, the other end of the framework is provided with an idler wheel type clamp, the end plate includes a switching mechanism of a first connector and a second connector, and the first connector is provided with a base, a shaft shoulder in which two grooves are distributed radially and evenly, and a connection shaft of a clamping groove; the second connector is provided with a connection plate and a connection sleeve in which two convex blocks and top screw holes are radially and evenly distributed, the connection sleeve cooperates with the connection shaft, the convex blocks cooperate with the grooves, and the top screw holes cooperate with the clamping groove; the idler wheel type clamp includes a clockwise rolling device and two wing-shaped brackets at the two sides, the clockwise rolling device includes a standard unidirectional air cylinder with double guiding rails, a wedge-shaped support with an opening facing downwards and rolling wheels, each wing-shaped support is provided with a bidirectional tightening air cylinder with a standard opening and lateral rolling clamps of two supporting plates, and the bottom of each supporting plate is provided with a pair ofrolling wheels. By adopting the auxiliary welding tool fixture of the T-shaped connector laser welding robot for the aluminum alloy sheets, the accurate control over the size and position of T-shapedconnectors and the rigid fixation of the T-shaped connectors can be achieved, and it is ensured that stringers are prevented from getting misaligned and limiting the welding deformation amount.

A semiconductor device has a control terminal attached to a patterned insulating substrate; a first projection formed on the control terminal; a second projection formed on the control terminal; a concave formed between the first projection and the second projection; a resin case disposed to cover the patterned insulating substrate, and having an opening for passing the control terminal therethrough; a first concave portion; a beam portion disposed at the opening of the resin case; a second concave portion formed in the beam portion; a resin block inserted into the opening of the resin case and sandwiching the control terminal together with the sidewall of the opening of the resin case to fix the control terminal to the resin case; a convex step portion; a third projection formed on a side surface of the resin block; and a fourth projection thinned on a bottom surface of the resin block.

To control the positioning of a spacer more accurately in a liquid crystal display device to prevent display defects due to incorrect positioning in a display region. To provide a liquid crystal display device with higher image quality and reliability, and to provide a method for manufacturing the liquid crystal display device with high yield. In a liquid crystal display device, a region onto which a spherical spacer is discharged is subjected to liquid-repellent treatment in order to reduce the wettability with respect to a liquid in which the spherical spacer is dispersed. The liquid (the droplet) does not spread over the liquid-repellent region and is dried while moving the spherical spacer toward the center of the liquid. Thus, incorrect positioning shortly after discharging, which has been caused by the loss of control in the liquid, can be corrected by moving the spherical spacer while drying the liquid.

The invention discloses a low-current pneumatic knife switch comprising a first bracket, a second bracket, a base, a knife holder, a knife blade, an electric control box, and an air pipe. The first bracket and the second bracket are respectively mounted at the left and right ends of the upper part of the base. The knife holder is mounted at an upper port of the first bracket. The knife blade is transversely mounted between the second bracket and the knife holder. The electric control box is mounted at the bottom of the base. The air pipe is mounted at the bottom of the base, and is disposed at one lateral side of the electric control box. Through the scheme, the low-current pneumatic knife switch provided by the invention is simple in structure and convenient to use. Under control of low current of the electric control box, an input air source signal is converted into required pressure to make the knife blade opened to a corresponding position. Knife blade positioning can be controlled accurately. The low-current pneumatic knife switch has a high degree of automation.

The invention relates to the technical field of ocean engineering construction, in particular to an offshore crawler-type walking operation platform. The offshore crawler-type walking operation platform comprises an operating platform, wherein the lower end of the operating platform is provided with four supporting legs, the four supporting legs are oppositely and pairwise arranged at intervals inthe transverse direction and in the longitudinal direction, the offshore crawler-type walking operation platform is characterized in that the lower ends of the supporting legs are provided with a crawler chassis, and the lower ends of the supporting legs is rotationally connected to the crawler chassis through a hinged structure. The offshore crawler-type walking operation platform has the advantages that the crawler-type walking platform is adopted to perform construction, a crawler is directly attached to a seabed, the operation platform is located above the water surface, only a few cylinders in the water are affected by the waves, therefore, under a certain wave condition, the platform can still perform normal operation, the precision of crawler walking can be controlled, and positioning after the platform moves each time can be controlled accurately.

An optoelectronic device including a carrier having a face including flat butt-jointed facets inclined in relation to each other; seeds, mainly made of a first compound selected from the group including the compounds III-V, the compounds II-VI, and the compounds IV, in contact with the carrier in the region of at least some of the joints between the facets; and conical or frustoconical, wire-like three-dimensional semiconductor elements of a nanometric or micrometric size, mainly made of the first compound, on the seeds.