30results about How to "Reduce or eliminate gaps" patented technology

The invention discloses a discharging device and a stirring vehicle with the discharging device. The discharging device comprises a discharging hopper, wherein a charging hole and a discharging hole are formed in the discharging hopper; the discharging hopper is formed by sequentially connecting a first baffle, a left side plate, a second baffle and a right side plate; a recessed arc-shaped notch is formed in the upper edge of the first baffle. According to the discharging device, when the stirring vehicle is used for discharging, the leakage or the splashing of a material to a construction site in a discharging process can be reduced or avoided, so that the whole operation process has environment-friendly effect.

The invention provides a pre-alignment device and detection equipment. The pre-alignment device includes a fixed structure and a pre-alignment structure, the pre-alignment structure is movably connected to the fixed structure, and the pre-alignment structure is located on the stage carrying the substrate to be tested in the pre-alignment state, and the pre-alignment structure includes The baffles and stoppers respectively define the position of the substrate to be tested in the first direction and the second direction perpendicular to each other. In the pre-alignment state, the baffles and / or stoppers are in line contact with the stage surface The part is located at the end of the baffle and / or the stopper which is in contact with the substrate to be tested. The pre-alignment device can relatively reduce or eliminate the gap between the baffle plate and the stage surface and the contact position between the stopper and the stage surface, so that the thinner substrate to be measured is not easy to be inserted into the baffle plate and the stage surface during the pre-alignment process. In the gap between the stage surface and the stopper and the stage surface, the pre-alignment accuracy and manual loading efficiency of the substrate to be tested are effectively improved, and the stable test of the substrate to be tested is ensured.

The invention discloses a small tooth difference planetary transmission device adopting pin hole output and provided with adjustable clearance. Small tooth difference planetary transmission includes hypocycloid pin wheel planetary transmission, cycloid pin wheel planetary transmission and involute small tooth difference planetary gear transmission. The adoption of the pin hole type output refers to that power transmission pins mounted on planet wheels are inserted into holes corresponding to power transmission discs on power transmission rods of output shafts, and then angular velocities of the planet wheels are output in a constant speed ratio. During precision transmission, phase positions of center wheels of two meshed pairs with 180-degree phase difference or phase positions of the power transmission pins on the planet wheels are relatively rotated for a small angle; and when two groups of phase differences of the meshed pair are symmetric, a group of center wheels relative to another group of center wheels are rotated for a small angle so as to reduce or eliminate transmission clearance. The transmission device can increase bearing capacity greatly, reduce the size and weight and improve impact resistance and transmission efficiency, and can be used for various types of transmission such as high speed, heavy load, high power, high accuracy, small return difference and the like.

An expandable casing with enhanced collapse resistance and sealing capability. An expandable tubular for use in a subterranean well includes multiple recesses extending into a wall of the tubular, with the recesses being longitudinally spaced apart along the wall. A method of expanding tubulars in a subterranean well includes the steps of: expanding a tubular in the well, the tubular including multiple recesses extending into a wall of the tubular; and after the expanding step, allowing the wall of the tubular to retract radially inward more at each of the recesses than between the recesses.

An expandable casing with enhanced collapse resistance and sealing capability is disclosed. An expandable tubular for use in a subterranean well includes multiple recesses extending into a wall of the tubular, with the recesses being longitudinally spaced apart along the wall. A method of expanding tubulars in a subterranean well includes the steps of expanding a tubular in the well, the tubular including multiple recesses extending into a wall of the tubular; and after the expanding step, allowing the wall of the tubular to retract radially inward more at each of the recesses than between the recesses.

The invention provides an array substrate and a preparation method thereof. The array substrate comprises an underlay substrate, a thin film transistor layer located at one side of the underlay substrate, a flattening layer and a third metal layer. The thin film transistor layer comprises a gate metal layer, a first insulation layer, an active layer and a source and drain metal layer which are arranged in sequence. The gate metal layer and the source and drain metal layer are arranged at the side of the flattening layer close to the underlay substrate. The third metal layer is arranged at the side of the flattening layer away from the underlay substrate. A groove is arranged on the flattening layer at a position corresponding to the third metal layer. The third metal layer is formed in the groove. According to the array substrate and the preparation method thereof provided by the invention, the third metal layer is arranged in the groove on the flattening layer, the section difference between the position of the third metal layer on a rubbing film layer and other position is reduced or eliminated, the surface flatness of rubbing film is improved, the uniformity of the rubbing is improved, and the final display effect is optimized.