32results about How to "Avoid self-locking phenomenon" patented technology

The invention discloses a high-friction-resistance ship arresting method. The high-friction-resistance ship arresting method is characterized in that the two ends of a high-friction-resistance arresting cable or a high-friction-resistance arresting barrier are fixedly connected with a force controller, and the ultimate tension of the force controller on the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier is smaller than the tensile strength of the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier; a plurality of buoys which are distributed at equal intervals are fixed to the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier, so that the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier overall floats on the water and forms a ship arrester; the ship arrester and a ship are controlled to meet a certain relational expression, and when the ship runs into the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier, the ship is effectively arrested through the ship arrester. The high-friction-resistance ship arresting method has the advantages that the situation that arresting is failed due to the fact that the arresting cable or the arresting barrier slides to the bottom of the ship in the process that the ship arrester arrests the ship can be effectively prevented, and accordingly ships in common bow shapes, especially forward bent bow shapes are effectively arrested.

The invention discloses a high-friction-resistance ship arresting method. The high-friction-resistance ship arresting method is characterized in that the two ends of a high-friction-resistance arresting cable or a high-friction-resistance arresting barrier are fixedly connected with a force controller, and the ultimate tension of the force controller on the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier is smaller than the tensile strength of the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier; a plurality of buoys which are distributed at equal intervals are fixed to the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier, so that the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier overall floats on the water and forms a ship arrester; the ship arrester and a ship are controlled to meet a certain relational expression, and when the ship runs into the high-friction-resistance arresting cable or the high-friction-resistance arresting barrier, the ship is effectively arrested through the ship arrester. The high-friction-resistance ship arresting method has the advantages that the situation that arresting is failed due to the fact that the arresting cable or the arresting barrier slides to the bottom of the ship in the process that the ship arrester arrests the ship can be effectively prevented, and accordingly ships in common bow shapes, especially forward bent bow shapes are effectively arrested.

The invention relates to a mechanical sliding sheet translation type precise seeding mechanism which comprises a seed selecting mechanism, a seed filling mechanism and a seed filling-discharging mechanism. The seed filling mechanism comprises a mechanical translation driving mechanism fixedly connected with the side wall of a seed filling box, a translation sliding sheet structure is arranged on one side opposite to the mechanical translation driving mechanism and comprises a U-shaped sliding groove in fixed arrangement and a supporting sliding sheet, and one horizontal end of the supporting sliding sheet is fixed on the side wall of the seed filling box while the other end of the same can slide in the U-shaped sliding groove; a power output shaft of a small motor of the seed filling-discharging mechanism is horizontal, an upper linkage gear is meshed with an upper rack frame, a lower linkage gear is meshed with a lower rack frame, the upper rack frame is fixedly connected with an upper cover plate, and the lower rack frame is fixedly connected with a lower bottom plate; each of the upper linkage gear and the lower linkage gear is a non-full-tooth gear, and only one of the upper linkage gear and the lower linkage gear is in a meshed state; the small gear respectively drives the upper cover plate and the lower bottom plate to be in reciprocating motion through the two rack frames to realize seed filling and seed discharging.

A drive apparatus for boarding and unboarding devices, in particular for passenger doors, boarding ramps, retractable steps and the like on public transport vehicles having an electric drive motor the driven element of which is connected to the input element of a first reduction gear the output element of which is coupled to the actuation devices for the boarding and unboarding devices where the drive apparatus is constructed as a compact drive where the electric drive motor, the first reduction gear and a second reduction gears as well as an energizable clutch are disposed axially behind each other inside a tubular housing between the first reduction gear and the second reduction gear.

The invention relates to a reel type accurate hole-seeding device. A seed filling and unloading mechanism comprises a small motor which is fixed relative to a seed filling box and a reel, the reel ismade of a soft material, two sides of the reel are located through rotating shafts, the middle of the reel is divided into an upper layer structure and a lower layer structure, and the upper layer structure and the lower layer structure are located on two sides of a bottom plate of the seed filling box and are both installed in guide grooves at the bottom of the seed filling box; the upper layer structure and the lower layer structure are both provided with the same holes, the small motor drives the reel to rotate through one rotating shaft, when the holes at the upper part of the reel are aligned with the holes of the seed filling box, the holes at the lower part of the reel are staggered with the holes of the seed filling box, seeds conforming to the size of the holes fall into the holesof the seed filling box at the moment, the seed filling process is completed, and when the holes at the lower part of the reel are aligned with the holes in the seed filling box, the holes at the upper part of the reel are staggered with the holes of the seed filling box, and at the moment, seeds fall into the holes of the lower bottom plate and fall from an inside pipeline of a seed falling platform to a holed tray. The seed filling process and the seed unloading process are periodically linked up, and continuous work can be realized.

The invention relates to a reel type accurate hole-seeding device. A seed filling and unloading mechanism comprises a small motor which is fixed relative to a seed filling box and a reel, the reel ismade of a soft material, two sides of the reel are located through rotating shafts, the middle of the reel is divided into an upper layer structure and a lower layer structure, and the upper layer structure and the lower layer structure are located on two sides of a bottom plate of the seed filling box and are both installed in guide grooves at the bottom of the seed filling box; the upper layer structure and the lower layer structure are both provided with the same holes, the small motor drives the reel to rotate through one rotating shaft, when the holes at the upper part of the reel are aligned with the holes of the seed filling box, the holes at the lower part of the reel are staggered with the holes of the seed filling box, seeds conforming to the size of the holes fall into the holesof the seed filling box at the moment, the seed filling process is completed, and when the holes at the lower part of the reel are aligned with the holes in the seed filling box, the holes at the upper part of the reel are staggered with the holes of the seed filling box, and at the moment, seeds fall into the holes of the lower bottom plate and fall from an inside pipeline of a seed falling platform to a holed tray. The seed filling process and the seed unloading process are periodically linked up, and continuous work can be realized.