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80results about How to "Slow down the opening speed" patented technology

Door body hinge assembly for refrigerator and refrigerator comprising same

The invention provides a door body hinge assembly for a refrigerator. The door body hinge assembly comprises a hollow shell, a first sliding part and a second sliding part, wherein the hollow shell is fixed to a refrigerator door body; the opposite contact faces of the first sliding part and the second sliding part are helical faces matched mutually; an elastic telescopic part is arranged on the helical face of the first sliding part, and a guiding groove and a limiting part extending from the guiding groove to the first sliding part are arranged on the helical face of the second sliding part; and the guiding groove defines the moving path of the elastic telescopic part, and in the opening process of the refrigerator door body, the first sliding part drives the elastic telescopic part to move into the limiting part along the moving path, so that hovering of the refrigerator door body is achieved. Compared with the prior art, the limiting part is arranged on the door body hinge assembly for the refrigerator, the refrigerator door body is made to have a hovering position, and a user can take and place objects conveniently; as for the forcible door opening phenomenon, even though the door opening force degree overcomes the hovering strength of the hinge assembly, the limiting part can also decrease the door body opening speed, and the buffer effect on forcible door opening is achieved.
Owner:HAIER SMART HOME CO LTD

GaN power tube gate drive circuit with controllable opening rate

A GaN power tube gate drive circuit with a controllable opening rate comprises an internal power supply generation module, a gate drive module, a charge pump module, an external capacitor and a current-limiting resistor. The gate drive module controls charging and discharging of a GaN power tube gate according to an external control signal; a plug-in capacitor is connected with the power supply end of the gate drive module through the current-limiting resistor. The internal power supply generation module comprises a power adjusting tube controlled by the charge pump module; before the GaN power tube is conducted, the charge pump module controls the power adjusting tube to be disconnected, so the first power supply generated by the internal power supply generation module is disconnected from the power supply end of the gate driving module, only the plug-in capacitor supplies power to the gate driving module, and the gate charging rate of the GaN power tube is reduced; when the GaN powertube is switched on and after set time delay, the charge pump module controls the power adjusting tube to be switched on, so the first power supply is connected to the power supply end of the gate driving module, the first power supply and the plug-in capacitor jointly supply power to the gate driving module, and the gate charging rate of the GaN power tube is increased.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Floor spring with function of delaying door opening

The invention discloses a floor spring with the function of delaying door opening. The floor spring comprises a shell, a piston, a connecting rod, a spring body, a cam, rolling wheels and a supporting plate; the piston, the connecting rod, the spring body, the cam, the rolling wheels and the supporting plate are all arranged in the shell; the two ends of the connecting rod are fixed to the piston and the supporting plate respectively, and the connecting rod is sleeved with the spring body; the cam is installed on the supporting plate, the cam rotates to drive the supporting plate to move and is matched with the rolling wheels, and a door rotates to drive the cam to rotate; when the opening angle of the door is within the range of 0 to 65 degrees, the curvature of the contact points of the cam and the rolling wheels is gradually increased. The curvature of the contact points of the cam and the rolling wheels is gradually increased when the opening angle of the door is within the range of 0 to 65 degrees; accordingly, when the door is opened within the range of 0 to 65 degrees, the resistance to the cam during rotating is increased; when the door is opened under the effect of uniform force, the resistance to the door is increased; accordingly, the opening speed of the door is reduced, the effect of delaying door opening is achieved, the situations that the door is opened too fast and the door collides with interference objects are avoided, and the safety performance is improved.
Owner:佛山市奥达金属制品有限公司

Railway gondola car bottom door opening and closing buffer device

PendingCN112498382AReduce the impact of opening and closingPrevent overall deformationHopper carsAutomotive engineeringChassis
The invention discloses a railway gondola car bottom door opening and closing buffer device which comprises a torsion bar spring mechanism, the torsion bar spring mechanism comprises a torsion bar spring and a connecting rod, the torsion bar spring is in a U shape, one end of the torsion bar spring is connected with a railway gondola car bottom door, the other end of the torsion bar spring is rotationally connected with one end of the connecting rod, the other end of the connecting rod is rotatably connected with a bottom frame of the railway gondola car, a spring buffer structure is arrangedon a bottom door stop of the bottom door of the railway gondola car, and when the bottom door of the railway gondola car is opened, the spring buffer structure is in elastic fit with the bottom door of the railway gondola car. The buffer device reduces opening and closing impact force of the bottom door through the torsion bar spring mechanism and the spring buffer structure, avoids integral deformation of the bottom door, cracking of weld joints, breakage of hinges, increase of gaps of the bottom door and the like, assists the bottom door to be closed through the torsion bar spring mechanism,reduces strength required for closing the bottom door, and reduces working intensity of operators.
Owner:CRRC TAIYUAN CO LTD

Pilot type pneumatic valve capable of preventing misoperation

Provided is a pilot type pneumatic valve capable of preventing misoperation. The pilot type pneumatic valve comprises a pilot valve and a main valve. A balanced air passage structure is arranged between the outlet end of the pilot valve and the environment outside the valve, and the balanced air passage structure is provided with a differential-pressure control normally-open valve and can enable high-pressure gas slowly leaking to the outlet end of the pilot valve to be released to the environment outside the valve through the structure; the pressure at the outlet end of the pilot valve is notincreased, and misoperation of the main valve is avoided; and the balanced air passage structure can be closed when the pilot valve is opened, and the problem of slowing down the opening speed of themain valve due to gas leakage generated by the balanced air passage structure is avoided, so that the negative influence of the arrangement of the balanced air passage structure on the pilot type pneumatic valve is prevented. By using the pilot type pneumatic valve capable of preventing misoperation, misoperation opening caused by leakage of high-pressure gas from the inlet end of the pilot valveto the outlet end can be effectively prevented, and the reliability of related equipment can be further improved.
Owner:南通欧伦嘉机械设备有限公司

Hinge module for refrigerator and refrigerator with same

The invention provides a hinge module for a refrigerator and the refrigerator with the same. The hinge module comprises a first slide stop part and a second slide stop part; the first slide stop part and the second slide stop part are respectively provided with a first butting surface and a second butting surface matched with each other; the outer peripheries of the first butting surface and the second butting surface are both circular, and are coaxially arranged; the first butting surface is projected with N first arc tables with the same structures from the peripheral side; the second butting surface is recessed with N+M first accommodating grooves with the same structures and matched with the first arc tables from the peripheral side; in an initial state, a door body is closed on a box body, the N first arc tables are respectively staggered from the corresponding first accommodating grooves, and arc center angles corresponding to the staggered differences are the same; and when the door body is opened from the box body to reach a first angle, at least one first arc table is completely embedded in the corresponding first accommodating grooves. The hinge module can realize hovering of the door body of the refrigerator in the opening process to satisfy user demands.
Owner:HAIER SMART HOME CO LTD

Steering gear and motor driving circuit thereof

An embodiment of the invention discloses a steering gear and a motor driving circuit thereof. The motor driving circuit comprises a driving unit, three switch units with same structures and three switch control units with same structures. The switch units are connected between three output ends of the driving unit and three-phase input ends of a motor respectively, and are used for controlling connection and disconnection of three-phase circuits of the motor according to driving signals output by the driving unit. The switch control units are connected between three output ends of the drivingunit and the three switch units respectively, and are used for reducing starting speeds of switch tubes of the three switch units. The steering gear and the motor driving circuit thereof have the advantages that the switch control units for reducing the starting speeds of the switch tubes are connected between the driving unit and the switch units, so that the starting speeds of the switch tubes are reduced, electromagnetic radiation generated during working of the switch units is weakened, and external radiation of the steering gear is reduced.
Owner:UBTECH ROBOTICS CORP LTD
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