6results about How to "Service life effect" patented technology

This utility model discloses a cutting device for use on a straight crystal vermicelli production line, comprising a frame with a cutting mechanism mounted on it. The frame includes a left side guard plate, a right side guard plate, and a bottom frame. The left and right side guard plates are respectively disposed on the left and right sides of the bottom frame and are fixedly connected to the bottom frame. The cutting mechanism includes a power component, a fixed blade component, and a moving blade component. The top end of the power component is connected to the left and right side guard plates, and the bottom end of the power component is connected to the moving blade component, driving the moving blade component to move up and down. The fixed blade component is fixedly connected to the bottom frame, and the fixed blade component and the moving blade component are offset from each other. The up and down movement of the moving blade component and the fixed blade component together achieve the offset cutting operation of the crystal vermicelli.

This application discloses a short-circuit protection circuit and a power conversion circuit. The short-circuit protection circuit includes: a power supply circuit; a control circuit that receives a first power supply from the power supply circuit and determines the transmission mode of a control signal based on the first power supply; and an output circuit that receives the control signal sent by the control circuit and sends the control signal to a load circuit. When a short circuit occurs in the load circuit, the voltage of the first power supply will periodically decrease gradually to below a set voltage threshold and then gradually increase. When the voltage of the first power supply is below the set voltage threshold, the control circuit will not send a control signal to the output circuit; when the voltage of the first power supply is above the set voltage threshold, it will send a control signal to the output circuit. The short-circuit protection circuit in this application can repeatedly disconnect and reconnect the output supplied to the load circuit when a short circuit occurs in the load circuit, effectively reducing short-circuit losses and lowering the configuration requirements and operating temperature of the components in the short-circuit protection circuit.

The utility model provides a double limit type electric hoist which comprises a chain guide frame and a lifting chain, an opening for one end of the lifting chain to penetrate through is formed in the lower end of the chain guide frame, a lifting hook is arranged at the end, penetrating through the opening, of the lifting chain, and a first limit device and a second limit device are arranged at the positions, close to the opening, of the chain guide frame. The first limiting device comprises a microswitch arranged in the chain guide frame, a trigger rod of the microswitch downwards extends out of the chain guide frame, the second limiting device comprises a proximity switch arranged in the chain guide frame and a detection body arranged on the lifting hook, and the detection body is arranged above the lifting hook. And the maximum distance of the detection body sensed by the proximity switch is greater than the maximum distance of the trigger rod extending out of the chain guide frame. The second limiting device adopts a non-contact proximity switch and a detection body, so that the lifting hook is difficult to contact with the chain guide frame, the internal structure of the electric hoist is difficult to impact, and the service life of the electric hoist is difficult to influence.

The utility model relates to an outer clamping strip assembly, a vehicle door assembly and a vehicle, the outer clamping strip assembly comprises an outer clamping strip main body and a detachable lip edge, and the first side of the outer clamping strip main body is provided with a first connecting part and a first flocking lip edge; the detachable lip edge comprises a second connecting part and a second flocking lip edge, and the first connecting part is detachably connected with the second connecting part; the second flocking lip edge and the first flocking lip edge extend in the length direction of the outer clamping strip assembly, and the second flocking lip edge is located on the upper side of the first flocking lip edge. The detachable lips are arranged on the outer clamping strip assembly, part materials in all areas of the outer clamping strip assembly can be matched and combined while the functional lips are conveniently replaced, the limitation of the product technology is released to a certain degree, and the production efficiency is improved. The service life of the outer clamping strip assembly can be prevented from being affected by the service life of the second flocking lip edge, resource waste caused by overall replacement of the outer clamping strip assembly is avoided, and the maintenance cost of the vehicle can be effectively reduced.

The utility model discloses a kind of rail clamping devices for slow slope parking of driveless carrier vehicle, including brake mechanism, fixed frame, lifting mechanism, fixed frame is connected with brake mechanism by lifting mechanism;The fixed frame includes top plate, mounting plate, and there are two mounting plates, two mounting plates are symmetrically arranged, and two mounting plate top ends are fixedly connected with top plate;The lifting mechanism includes lifting frame, lifting hydraulic cylinder, lifting frame is arranged at the bottom end of two mounting plates and lifting frame can move along the height direction of mounting plate, the top end of lifting hydraulic cylinder is connected with fixed frame, the bottom end of lifting hydraulic cylinder is connected with lifting frame and drives lifting frame to carry out lifting action;Lifting frame is provided in cross type structure, in the cross type structure of lifting frame, left and right end bottom is symmetrically provided with guide assembly and is contacted with running track by guide assembly, front and rear ends are rotatably connected with brake mechanism, and brake mechanism is arranged between two mounting plates.

The utility model relates to a mask frame system and a mask, and relates to the technical field of ventilation treatment. The mask frame system comprises a frame middle part, bone beam arms extending from the two sides of the frame middle part respectively and protective sleeves arranged on the bone beam arms respectively in a sleeving mode, the protective sleeves comprise the first protective sleeve and the second protective sleeve, and due to the fact that the protective sleeves are of a split type, the protective sleeves are not prone to falling off. The first sheath and the second sheath are detachably connected with the extension arm respectively, so that when the first sheath and the second sheath are taken down from the extension arm, the first sheath and the second sheath cannot be torn to deform or generate irreversible elastic stress fatigue, and the service life of the sheath can be prolonged; and the relative position between the sheath and the extension arm is limited through the first limiting part and the second limiting part, so that the sheath and the extension arm are not prone to relative movement, and the situation that the service life of the sheath is affected due to wrinkles can be avoided.