43results about How to "Prevent sudden drop" patented technology

The invention discloses an air pressure meter belt type watch. The air pressure meter belt type watch comprises a watch disc, a storage watch belt and a plug-in watch belt. The upper ends of the storage watch belt and the plug-in watch belt are movably fixed to the watch disc in a hinge connection mode. A hollow sliding way is formed in the storage watch belt. A containing cavity, a spring positioning groove, an air hole passageway and a through passageway are formed in the plug-in watch belt. An opening in one end of the air hole passageway is located in the bottom of the lower end of the plug-in watch belt, and an opening in the other end of the air hole passageway is in through connection with the through passageway. A special-shaped pressing sealing part is further arranged in the containing cavity. The special-shaped pressing sealing part is composed of a belling boss, a connecting center shaft and an air plugging stretching table. The special-shaped pressing sealing part and theplug-in watch belt are movably fixed into the containing cavity through the connecting center shaft in a hinge connection mode. A reset spring is further arranged in the containing cavity, one end ofthe reset spring is located in the spring positioning groove, and the other end of the reset spring abuts against the belling boss. The air plugging stretching table abuts against an air inlet and outlet in one end of the through passageway, and completely covers the whole air inlet and outlet.

The invention discloses a combined double-layer switch cabinet, which comprises a main cabinet body, two symmetrical cabinet doors are arranged on the front of the main cabinet body, a PLC controller is arranged on the side of the main cabinet body, and the main cabinet body Two symmetrical limit blocks are fixedly installed on the bottom wall of the body, and installation grooves are movably connected between the adjacent sides of the two limit blocks. An adjustment plate is fixedly installed on the top of the slide rail, an installation frame is fixedly installed on the top of the adjustment plate, and a fixed frame is fixedly installed on the top of the installation frame. The invention can control the lifting and lowering of the regulating plate while the regulating plate is rising or falling, and the limiting rollers on both sides receive the limiting action of the limiting plate, so that the rising and falling of the regulating plate is more stable. The friction between them is rolling friction, which reduces the wear and tear between equipment parts.

The invention discloses a screw-type bulldozer sample device and its bulldozer sample method, comprising a bottom plate, a middle plate, a top plate, a sampling cylinder, and a top cover, wherein both sides of the bottom plate, the middle plate, and the top plate are coaxially connected and fixed by support columns, A sleeve is added on the upper part of the top cover to ensure that when the runner rotates the screw propulsion rod, the top cover is evenly stressed and acts as a guide for the top cover; an ear plate is set on the outer wall of the sampling cylinder, and the groove is used to facilitate the sampling cylinder The installation and centering of the sampling cylinder can ensure the balance of the sampling cylinder during the soil sampling process; a tray with a spring is added to the bottom plate, and the support of the tray and the buffering effect of the spring can prevent the soil sample from falling suddenly, resulting in deformation and damage of the soil sample . The anti-slip structure is provided on the runner to prevent the rotating runner from slipping and to facilitate uniform force application. The invention improves the efficiency of soil extraction and ensures the quality of soil samples.

The invention relates to a lifting device which comprises a lifting mechanism connected with a hydraulic control system, wherein the lifting mechanism comprises more than one group of lifting units; each lifting unit comprises a lower supporting plate, an upper lifting platform and multilayer supporting devices; each-layer supporting device comprises two supporting arms arranged in an X-shaped cross manner and hinged through a pin shaft; the upper ends of the two supporting arms are correspondingly hinged to the lower ends of two supporting arms of the upper-layer supporting device; the bottom end of a supporting arm of the lowest-layer supporting device is hinged to the lower supporting plate, and a lower idler wheel which rolls in a lower track on the lower supporting plate is mounted at the bottom end of the other supporting arm of the lowest-layer supporting device; the top end of a supporting arm of the uppermost-layer supporting device is hinged to the bottom of the upper lifting platform, and an upper idler wheel which rolls in an upper track on the upper lifting platform is mounted at the top end of the other supporting arm of the uppermost-layer supporting device; the fixed end of a hydraulic cylinder is hinged to the lower section of one supporting arm of the lowest-layer supporting device; the stretching end of the hydraulic cylinder is hinged to the lower section of one supporting rod of the uppermost-layer supporting device.

The invention discloses special equipment for tipping and replacing a medium and large-size slab ingot crystallizer applied to an aluminum machining industry. The special equipment comprises pedestals, a tipping beam and a hydraulic device, wherein two pedestals are arranged in parallel on a pedestal fixing plate; the pedestals, the tipping beam and the hydraulic device are mutually articulated to form a triangular structure; the pedestals are articulated with one end of a protective supporting rod device; the tipping beam is provided with a limiting baffle which is matched with the other end of the protective supporting rod device in use; one end, articulated with the corresponding pedestal, of the tipping beam is provided with an inductance-type proximity switch which is fixed by virtue of a travel switch bracket; the travel switch bracket is articulated with the protective supporting rod device through a connecting rod; the tipping beam is connected with a flat ingot crystallizer casting platform through a positioning pin and a hexagonal bolt. The special equipment disclosed by the invention has the advantages of eliminating potential safety hazards existing in work on a relatively deep vertical shaft, also solving the problem of harms to an operator who works in an environment with much high-temperature moisture for a long time, and also improving the work efficiency and the production efficiency.

The invention discloses a chain hoist, which comprises a casing, a left wallboard, a right wallboard, a long shaft, an upper hook, a lower hook, a lifting device arranged in the casing, and a hand pull device for driving the lifting device to go up and down ; It is characterized in that: the hand chain hoist makes the hand chain wheel rotate through the hand chain, and then drives the lifting chain wheel to rotate through the interlocking parts to complete the lifting of the lower hook. The invention has the advantages of anti-jamming chain, anti-dropping and the like.

A card connector (1), wherein a cam mechanism (50) is composed of a heart-shaped cam groove (42) that is formed in a slider (40), and a cam rod (51) that is shaft-supported by a housing (10) and that swings along the cam groove (42). A locking member (60) has a cantilever form one end of which is fastened to the slider (40), and the mobility range of the free end at the other end overlaps with the cam groove (42).

The invention relates to a mechanical connecting element (1) for electromechanical connecting sections (22, 44), in particular a retaining element (1) for an adhesively bonded connection, preferably awelded connection, in particular for the motor vehicle sector, having two mechanical connecting regions (12, 14) for at least one connecting section distinct from the connecting element or for two connecting sections distinct from the connecting element, wherein the two connecting regions are arranged above one another in the connecting element in such a way that the two connecting sections can be brought into direct electromechanical contact above one another in the connecting element. The invention further relates to an electrical connector, in particular a high-current connector, preferably a charging plug for the motor vehicle sector, wherein the connector has a mechanical connecting element which connects an electrical contact device (2) of the connector and an electrical cable (4) of the connector to each other, and the connecting element is formed according to the invention.

The invention discloses a dynamic rotating speed protection method and system for virtual inertia frequency modulation of a doubly-fed fan. The method comprises the steps that an MPPT curve power reference value is obtained according to the rotating speed of the fan; performing virtual inertia control on the deviation between the actual frequency and the rated frequency to obtain an additional active reference signal added on the basis of the MPPT curve power reference value; performing dynamic rotation speed protection on the fan electromagnetic power actually output at the previous moment, the rotation speed of the fan and the product of delta f and the virtual inertia control differential coefficient to obtain output power; According to the power reference value, the extra active powerreference signal and the output power, obtaining the electromagnetic power output by the fan at the current moment. The output power of the fan can slowly drop to the maximum power tracking curve according to the change of the rotating speed of the rotor in the frequency modulation process, excessive reduction of the rotating speed of the fan is avoided, the fan can automatically recover to the original maximum power point after frequency modulation is finished, and therefore the stability and economical efficiency of the fan in the frequency modulation process are guaranteed.

The invention discloses an air pressure watchband type watch, which comprises a dial plate, a storage watchband and a plug-in watchband, wherein the upper ends of the storage watchband and the plug-inwatchband are movably fixed with the dial plate in a hinged manner, a hollow sliding channel is arranged in the storage watchband, the plug-in watchband is provided with an accommodating cavity, a spring positioning groove, an air hole channel and a through channel, an opening at one end of the air hole channel is positioned at the bottom of the lower end of the plug-in watchband, an opening at the other end of the air hole channel is communicated with the through channel, a special-shaped pressing sealing piece is further arranged in the accommodating cavity, is composed of a finger pressingboss, a connecting middle shaft and an air blocking extending table, and is movably fixed in the accommodating cavity through the connecting middle shaft and the plug-in watchband in a hinged mode, areset spring is further arranged in the accommodating cavity, one end of the reset spring is located in a spring positioning groove, the other end of the reset spring abuts against the finger pressing boss, and the air blocking extending table abuts against the air inlet and outlet in one end of the through channel and completely covers the whole air inlet and outlet.

The invention relates to a ship body paint-removing wall-climbing robot system in the technical field of environment-friendly paint removing. The ship body paint-removing wall-climbing robot system comprises a robot body which is remotely controlled to automatically climb on the wall face of a ship body and a hoisting component for hoisting the robot body. The robot body includes: a robot frame; two pairs of walking wheels which are rotationally arranged on the left and right sides of the robot frame respectively; a walking driving mechanism whchi is mounted on the robot frame and used for driving the two pairs of walking wheels to roll on the wall surface of the ship body; a spray washing mechanism which is mounted on the robot frame and used for washing old paint on the wall surface of the ship body; a sewage recycling mechanism whcih is arranged on the robot frame and is used for recycling sewage, wherein the sewage discharge end of the sewage recovery mechanism is communicated witha sewage recovery container which is independently arranged relative to the robot main body. Old paint on the wall face of the ship body is rapidly removed in a relatively environment-friendly mode,time is saved for rapid coating of the ship body, efficiency is improved, and safety guarantee is provided for operators.

The invention relates to the automobile spare tire external support field, particularly to a spare tire protection and lifting fixing device. The spare tire protection and lifting fixing device comprises a mounting support assembly, a transmission mechanism assembly, a pallet assembly and a steel wire rope. The mounting support assembly comprises a large support, a small support and a transmission pipe, wherein the large support and the small support are fixedly connected to an automobile body and fixedly connected through the transmission pipe; the transmission mechanism assembly is fixedly mounted on the large support, a main shaft in the transmission mechanism assembly is drivingly connected with a transmission disk which is connected with an inner gear disk through gear transmission, and the outside of the inner gear disk is provided with a wire slot; and one end of the steel wire rope is connected with the pallet assembly, the other end of the steel wire rope penetrates through the transmission pipe and is connected with the wire slot of the inner gear disk in a winding mode, and the disk piece of the inner gear disk is provided with lightening holes. According to the spare tire protection and lifting fixing device, the transmission mechanism is reasonable, the weight of moving parts can be lightened through the lightening holes, and labor-saving operation and smooth and stable transmission are achieved.

The invention relates to a lifting hydraulic control system which comprises an oil tank, a hydraulic pump and a hydraulic control circuit, wherein an input end of the hydraulic pump is connected with the oil tank via a pipeline; the lifting hydraulic control system is characterized in that an output end of the hydraulic pump is connected with the P port of a three-position four-way valve; the T port of the three-position four-way valve is connected with the oil tank via a pipeline; the A port of the three-position four-way valve is connected with an input end of a balance valve; each of the two input ends of the balance valve is connected with an input end of each of two hydraulic control valves; the B port of the three-position four-way valve is divided into two branches, and each of the two branches is connected with the other input end of each of the hydraulic control valves; the output ends of the hydraulic control valves are connected with the input ends of corresponding hydraulic cylinders; electromagnetic valve reversing valve branches are arranged on pipelines between the hydraulic control valves and the input ends of the hydraulic cylinders; input ends of electromagnetic reversing valves are connected with the input ends of the hydraulic cylinders; two output ends of the electromagnetic reversing valves are connected with the oil tank via pipelines respectively; the hydraulic pump, a three-way electromagnetic valve and the electromagnetic reversing valves are connected with the control circuit.