56results about How to "Small opening and closing force" patented technology

The invention discloses a damping device for a sliding door. The damping device comprises an immobile part, a movable part, a toggling mechanism and a damping mechanism; the toggling mechanism comprises a fixed part and a toggling part; the damping mechanism comprises an oscillating member which is arranged on a fixed seat through a spring in a sliding manner, wherein the oscillating member is provided with a locating gap buckled with the toggling part in a collision way, the fixed seat is provided with a damper, a piston rod of the damper protrudes towards the direction of the oscillating member and at least one section of travel of the piston rod acts on the oscillating member when the damper is used for buffering; the spring is a tension spring, one end of the spring is connected with the fixed seat, and the other end of the spring wound around a turning member on the fixed seat and then is connected with the oscillating member; the toggling mechanism is arranged on the immobile part, the damping mechanism is arranged on the movable part and is provided with a damping roller, or the toggling mechanism is arranged on the movable part and is provided with a toggling roller, the damping mechanism is arranged on the immobile part, and either the damping roller or the toggling roller is rotationally located on the immobile part and/or the toggling mechanism when the movable part moves. The damping device is strong in practicality.

The invention discloses a down-the-hole radial gate with multiple frames and multiple trunnions and two lifting pad eyes. The down-the-hole radial gate with the multiple frames and the multiple trunnions and the two lifting pad eyes is characterized in that a multiple frame structure is adopted in the door body structure of a gate (1), and the gate (1) is hinged with a group of trunnions (4) installed on a breast wall (3) of a gate wall (2). The down-the-hole radial gate with the multiple frames and the multiple trunnions and the two lifting pad eyes reduces loads distributed to each main beam and each support arm through the multiple frame structure, shares huge concentrated water pressure of a high water head of a drainage port to the gate through the plurality of trunnions, and the loads distributed to each trunnion are greatly reduced so as to reduce the difficulties of the design, manufacture, welding, transportation and installation of the gate and the casting of the trunnions. The radial gate is provided with the two lifting pad eyes, is operated by adopting a double-cylinder swinging type or a suspension type hydraulic cylinder, the volume of single cylinder hydraulic cylinder is reduced by half so as to reduce the difficulties of the design, manufacture and installation of the hydraulic cylinder. The rotating center of the gate coincides with the circle center of an arc-shaped water-facing surface, and the total water pressure acting on the arc-shaped water-facing surface is enabled to always pass through the rotating center of the trunnions so as to reduce the force of the opening and closing of the gate.

The invention discloses a connecting-rod opening and closing mechanism used for casement doors and windows and suspended sash windows and relates to the technical field of a door-window opening and closing mechanism. A stay bar comprises four connecting rods which are hinged successively from the head to the tail, wherein kinematic pairs are arranged on two active connecting rods to be convenient for receiving power to drive the connecting rods. By utilizing the instability of quadrangles, the two active connecting rods equipped with the kinematic pairs drive the other two passive connecting rods to move synchronously to open and close a window sash connected with the stay bar while being driven by power. Compared with the prior art, the connecting-rod opening and closing mechanism disclosed by the invention skillfully transforms the movements of translation or rotation of a transmission mechanism to the movements of translation and rotation for opening and closing the casement doors and windows and the suspended sash windows. The connecting-rod opening and closing mechanism has the characteristics of simple structure, reliable performance, large opening and closing force, low motor power consumption, no movement dead point limitation, low noise, large push force and rapid and stable opening and closing speeds.

The invention discloses a split type bottom pushing movable road bridge. The movable road bridge is separated into two single-side bridge bodies which are symmetrically arranged; the single-side bridge bodies comprise bridge body structures and start-stop oil cylinders, fixed bearings are connected to the bottoms of the bridge body structures, the bottoms of the tails of the bridge body structures are connected with the start-stop oil cylinders through hinge bearings, and the start-stop oil cylinders are connected with device embedding parts; and balance weights are hung at the tail parts of the bridge body structures, and locking devices are arranged at the tail parts of the bridge body structures. The split type bottom pushing movable road bridge can avoid the condition that when extending out completely, parts of the start-stop oil cylinders of the movable road bridge easily exceed the building structures so that the influence on ship navigation or collision with a ship body is caused; and simultaneously, the problem that as the rigidity synchronization of the start-stop oil cylinders of the movable road bridge cannot be consistent easily, the interference with related structures can occur easily can be avoided.

The invention discloses a maintenance method and structure from a tail water tunnel access door slot to an outlet tunnel section. The maintenance method comprises the following steps: locally expanding a tail water outlet, arranging a group of longitudinal partition piers at the tail water outlet for dividing the tail water outlet into a plurality of gate holes, wherein each gate hole is providedwith a gate slot, and a maintenance gate is is arranged in the corresponding gate slot; connecting and locking the maintenance gates onto a locking beam of the tail water outlet maintenance platform by pull rods, and connecting, opening and closing the maintenance gates by the pull rods through a temporary crane. In case of not affecting tail water outlet flow and unit output, multiple maintenancegates are arranged at the tail water outlet to realize maintenance requirements and reduce opening-closing force of operating the maintenance gates, so that temporary equipment with relatively smalllifting force can be selected to meet requirements of operating the gates; and the maintenance gates at the tail water outlet are connected and locked onto the tail water outlet maintenance platform through the pull rods, and are conveniently assembled and disassembled, so that trouble of penetrating through a shaft underwater of the temporary crane is avoided better, and investment of adopting permanent opening-closing equipment can be saved.

The invention relates to the field of fittings for building doors and windows, and particularly discloses a lifting-assisting device for an aluminum alloy internal flat-opening hopper window. The lifting-assisting device for the aluminum alloy internal flat-opening hopper window comprises a base cushion fixed on a slot opening in the bottom of a sash through inner hexagonal fastening screws B and is characterized in that a base A is fixed on a slot opening, corresponding to the base cushion, in the bottom of a window frame, a base B is connected to the base A through a cross recessed countersunk head screw, an idler wheel arranged through a small shaft is arranged between the base A and the base B, and a guide surface corresponding to the idler wheel is arranged on the base cushion. The lifting-assisting device has the advantages of reasonable structure design, convenience for installation and use, small window opening and closing forces, accuracy in selected materials, long service life, more humanized design, and wide application range.

The invention relates to a hydraulic seal type steel gate. The hydraulic seal type steel gate includes a steel gate body and a gate frame, the steel gate body is placed in a gate groove in the inner side of the gate frame, a plurality of hydraulic jacks are horizontally arranged between the steel gate body and the gate frame, the steel gate body is internally provided with a one-way flow guiding valve, the one-way flow guiding valve is connected with the hydraulic jacks, the one-way flow guiding valve is connected with a high-pressure electric oil pump, double-P-shaped rubber is disposed between the steel gate body and the gate frame, piston rods of the hydraulic jacks are in contact with the gate frame, holes are formed in both sides of the upstream face of the steel gate body, spring seats are installed in the holes, the spring seats are internally provided with telescopic rods, pressing plates located in the spring seats are fixedly disposed on the telescopic rods, springs sleevingthe telescopic rods are arranged between the pressing plates and the spring seats, the lower ends of the telescopic rods penetrate through the bottoms of the spring seats and are connected with adjusting nuts, the front ends of the telescopic rods are connected with rolling wheels through hinge pins, and L-shaped rubber sealed with the gate frame in an attached mode is disposed on the downstream face of the steel gate body. The hydraulic seal type steel gate has a simple structure, a good water stopping effect and a long service life, and can realize bidirectional water stop.

The invention relates to a built-in diaphragm type sleeve valve. The built-in diaphragm type sleeve valve comprises a valve body, a sleeve gate arranged in the valve body, and a valve base mounted on a flange in an outlet of the valve body. The sleeve valve further comprises a control component, a movement component and a diaphragm cavity component; the control component is arranged above the valve body; the movement component and the diaphragm cavity component are arranged in the valve body; the back end of the movement component is connected with the control component through a distribution pipe, and the front end is connected with the sleeve gate by penetrating through the diaphragm cavity component; and when the sleeve valve performs an opening/closing action, the control component detects and controls pressure in the diaphragm cavity component through the distribution pipe so as to control the movement component to drive the sleeve gate to move so as to realize the opening/closing action of the valve. Compared with the prior art, the built-in diaphragm type sleeve valve has such advantages as simple structure, low cost, good fluid state, excellent energy dissipation and cavitation resistance, multiple driving modes, powerful functions, low opening/closing force and reduction of extension connecting cost.

The invention relates to a door lock device for a large door. The device is mounted on a door leaf frame and used for locking the door leaf frame on a frame panel; the door lock device comprises a top locking point unit, an opening unit, a bottom locking point unit and a linkage unit; the top locking point unit and the bottom locking point unit are mounted at the top and the bottom of the door leaf frame correspondingly; the opening unit is mounted on the door leaf frame and located between the top locking point unit and the bottom locking point unit; the opening unit is connected with the top locking point unit and the bottom locking point unit through the linkage unit; and the opening unit controls the top locking point unit and the bottom locking point unit through the linkage unit to achieve the locking and unlocking actions. Compared with the prior art, the door lock device has the beneficial effects of being low in failure rate, convenient to operate, easy to mount, convenient to operate and maintain, high in attractiveness and the like.