32results about How to "Change the size of the force" patented technology

The invention relates to a magnetic field testing device and method. The testing device provided by the invention comprises a control power supply and a host which is connected with the control power supply, wherein the host comprises a cabinet; the inner wall of the cabinet is provided with a shielding layer; a support is arranged on the base of the cabinet; the support is connected with a framework; a coil winding is arranged on the framework; the outer side of the framework is provided with an insulating layer; and a cooling fan is arranged below the base of the cabinet. In the invention, the simulation of the actual physical and mechanical properties of geomechanics is realized based on the principles of simulating gravity by utilizing an electromagnetic force and simulating a gravityfield by utilizing an electromagnetic force field. A powdery magnetic material is blended into rock soil so that the magnetic force action on the rock soil in the magnetic field is overlapped on the original gravity, thereby achieving the effect of simulating the ng gravity field, improving the stress level of a model test material, and providing basic equipment for the magnetic force model test of the geomechanics.

The invention provides a graphite powder purification method. The method comprises the following steps: graphite powder to be purified is placed into a high-temperature sealed kiln and undergoes vacuum calcination in the atmosphere of protective gas; when the calcination temperature reaches 2,000-3,000 DEG C, multiple pneumatic control variation steps are carried out to control periodic pulsative oscillation change of air pressure in the high-temperature sealed kiln. Each pneumatic control variation step contains a gas withdrawal step and a gas injection step. For 1-3 h of each pneumatic control variation step, range of pressure change in the high-temperature sealed kiln is controlled to 1-10 kPa. According to the invention, the graphite powder with high carbon content can be obtained under the condition of low calcination temperature. The preparation process is simple, and the requirement on equipment is low.

The invention discloses a spontaneous-combustion type fire extinguishing bullet for firefighting and further discloses a launching device of the fire extinguishing bullet. The spontaneous-combustion type fire extinguishing bullet comprises an opening sealing cover, an external container and an internal container; and threads are arranged on the inner walls of both the inner circle and the outer circle of the opening sealing cover correspondingly, a puncturing sharp knife is arranged at the top end in a second external container body, and the upper side wall of a first sealing ring is fixed tothe outer wall of the internal container through plastic screws. The launching device comprises a launching cavity, a material putting chamber, a first spring, a first material channel and a second material channel; and the upper end of the launching cavity is connected with the material putting chamber through the first material channel, a first electromagnet opposite to a first permanent magnetin magnetic pole is arranged at the tail end of a piston rod, and a second electromagnet is arranged on the inner wall of the upper end of the second material channel. The spontaneous-combustion typefire extinguishing bullet and the launching device thereof are high in safety factor and convenient to carry and are not limited by the geographical location and water sources, a large quantity of human resources can be saved, and ash is prevented from combusting again under the condition that the normal atmosphere is restored.

The invention discloses an automatic press-fit recovery storage device of a pop-top can. The automatic press-fit recovery storage device comprises a feeding assembly, a pressing-fit bin, a driving assembly and a storage bin, wherein the driving assembly comprises a motor bin and a push rod, the two sides of the motor bin are fixedly connected with the storage bin, the top of the storage bin is connected with a base plate through a bolt, and the top of the base plate is fixedly connected with a second supporting base; and the second supporting seat is fixedly connected with the pressing-fit bin, a first notch is formed in the top of the pressing-fit bin, moreover, a second notch is formed in the bottom of the pressing-fit bin, the first notch is aligned with the feeding assembly, the push rod penetrates through the first supporting seat and the pressing-fit bin in sequence and then is fixedly connected with a pressing-fit block. According to the device, the structure is simple, the assembly is convenient, the feeding is stable, a rotary table is driven by a motor to rotate, so that the reciprocating motion of the push rod is realized; and the pop-top can can be automatically droppedafter being compressed to a proper size, the rotation speed of the motor is controlled, the speed and the acting force of the pressing-fit block can be changed to extrude the pop-top can, and the device can be widely applied to pop-top can press-fit recovery with different materials.

The invention relates to a brake device of self-adaptive weight high-rise fire escape rope emergency landing equipment. The brake device comprises an outer shell, an inner shell nested in the outer shell, elastic parts and a brake part, wherein the inner shell is in sliding connection with the outer shell in at least one direction; the elastic parts are connected with the inner shell and the outershell so as to apply action force opposite to the sliding direction of the inner shell and the outer shell; the brake part is fixedly connected onto the outer shell or the inner shell and is used forchanging the size of resistance applied to the rope when the rope is pulled out according to the size of relative sliding displacement between the inner shell and the outer shell. Through such arrangement, the resistance generated when the rope in the self-adaptive weight high-rise fire escape rope emergency landing equipment adopting the brake device is pulled out is positively correlated with the weight of emergency landing people so as to control the landing speed difference of the emergency landing people with different weights to be reduced.

The invention discloses a fire extinguishing bomb. The bomb comprises a first container, a second container and a fixing base, wherein the outer wall of the fixing base is in threaded connection withthe inner wall of the first container, moreover, the second container is sleeved with the first container, and a third container is further sleeved with the second container; a plurality of round holes are formed in the surface of the third container, and puncture bulges are arranged at the gaps of the round holes; the invention further provides a launching device, the launching device comprises alaunching cavity, a material feeding chamber, a first spring, a first material passage and a second material passage, wherein the upper end of the launching cavity is connected with the material feeding chamber through the first material passage, an air pressure cylinder is arranged on the inner wall of the right end of the launching cavity, moreover, the tail end of the air pressure cylinder isconnected with one end of the first spring, and the other end of the first spring is provided with a first permanent magnet; and a first electromagnet which is opposite to the magnetic pole of an permanent magnet is arranged at the tail end of a piston rod, a second electromagnet is arranged on the inner wall of the upper end of the second material channel, and the second electromagnet is connected with the permanent magnet through a second spring. According to the bomb and the device, the structure is simple, operation is convenient, and application range is wide.

The invention relates to the technical field of pavement construction, and in particular relates to a highway tamping device for highway engineering. The device comprises a mounting frame, a vertical plate is fixedly connected to the center of the interior of the mounting frame, the space formed by the vertical plate and the left side wall of the mounting frame and the space formed by the vertical plate and the right side wall of the mounting frame are both set as working cavities, tamping pieces are slidably arranged in the working cavities, the upper side of each tamping piece is fixedly connected with the upper side wall of the mounting frame through a spring; a fixed seat and a movable seat are arranged on the upper side face of the mounting frame, a motor is arranged on the fixed seat, a main gear fixedly sleeves the motor shaft of the motor, the movable seat is in sliding connection with the mounting frame, an electric push rod is connected between the movable seat and the fixed seat, a rotating shaft is arranged on the movable seat, a driven gear and a take-up barrel fixedly sleeve the rotating shaft, the driven gear matches the main gear, a wire rope is wound on the take-up barrel, and the bottom end of the wire rope is fixedly connected to the tamping pieces. According to the tamping device, cross tamping operation is carried out through the two tamping pieces, the action area is increased, and the working efficiency is improved.

The invention discloses a running training device, and mainly relates to the field of training instruments. The device comprises protective guards which are symmetrically arranged, and a running platform is arranged between the two protective guards. The device is characterized in that: the longitudinal section of the running platform is in an arc shape, a groove is formed in the running platform, a plurality of rotating shafts are rotationally connected into the groove, rotating rollers are fixed to the rotating shafts, the rotating rollers are arranged on the rotating shafts, the two sides of the lowest position of the running platform are rotationally connected with the two protective guards respectively, telescopic rods are rotationally connected to the protective guards, the movable ends of the telescopic rods are rotationally connected with the bottom of the running platform, and damping adjusters used in cooperation with the rotating rollers are arranged on the protective guards. The device has the beneficial effects that: the device is simple in structure, does not need to consume energy during use, is more environment-friendly during use, and can supervise and urge a user and guarantee a training result.

The invention relates to a gravity self-adaption constant-speed forced landing device for high-rise fire disaster escaping. The gravity self-adaption constant-speed forced landing device for high-risefire disaster escaping comprises an outer shell, an inner shell which is embedded into the outer shell and is in sliding connection with the outer shell at least in one direction, an elastic part, abraking part and a pull rope brake part. The elastic part is connected with the inner shell and the outer shell so that the acting force opposite to the sliding direction of the inner shell and the outer shell can be exerted. The braking part comprises a movable part used for transmitting torque and a brake part used for exerting reverse acting force on the movable part. The brake part and the movable part are not connected to the outer shell or the inner shell at the same time, and therefore the brake part and the movable part can relatively move and/or deviate along with the sliding of the inner shell and the outer shell, and the acting force between the brake part and the movable part is changed. The pull rope brake part is provided with at least one rotating component which is used forexerting reverse acting force on pull ropes passing through the pull rope brake part. The rotating components are in sliding friction-free connection with the pull ropes so that the rotating angularspeeds can correspond to the speeds of the pull ropes passing through the rotating components in a one-to-one manner.

The invention relates to a hovering control method and device for a multi-rotor unmanned aerial vehicle, the multi-rotor unmanned aerial vehicle and a storage medium, and aims to solve the problem that in related technologies, hovering can only be conducted horizontally through a vehicle body. The method is applied to the multi-rotor unmanned aerial vehicle and comprises the following steps: calculating an expected tilt angle of a rotor when the multi-rotor unmanned aerial vehicle hovers at a first expected attitude angle according to the first expected attitude angle of the multi-rotor unmanned aerial vehicle and a second expected attitude angle of the multi-rotor unmanned aerial vehicle when the multi-rotor unmanned aerial vehicle hovers horizontally at a fuselage; based on a preset control algorithm, calculating an expected rotating speed of the rotor when the multi-rotor unmanned aerial vehicle hovers at the first expected attitude angle; and controlling the rotor wing to tilt according to the expected tilt angle, and controlling the rotor wing to rotate according to the expected rotating speed.

The invention provides a modularized variable-stiffness robot joint. The modularized variable-stiffness robot joint comprises a position motor module (1), an input module (2) and an output module (3); the position motor module (1) is connected with the input module (2) through a shaft sleeve (13), and the input module (2) is connected with the output module (3) in a vertically corresponding mode. According to the modularized variable-stiffness robot joint, the problems that in the prior art, the coupling of a position motor and a stiffness-adjustable motor is high, the changing range of stiffness is small, energy consumption for stiffness adjustment is high, variable-stiffness parts are coupled with one another, the passive stiffness characteristics are poor, and connected with other external equipment is needed are solved.

The invention discloses an immersed tube structure applicable to high flow velocity and a construction method thereof, and belongs to the field of immersed tubes. The immersed tube structure applicable to high flow velocity comprises an immersed tube body, wherein a passage for traffic is arranged in the immersed tube body, a plurality of flow guide covers are arranged on one side of the immersedtube body along the length direction, elastic bag bodies are arranged on the outer side of the flow guide covers, a protrusion control device is arranged in each flow guide cover, the protrusion control devices support the elastic bag bodies so as to control the protrusion degree of the elastic bag bodies, and the protrusion degree of each flow guide cover can be independently adjusted. Accordingto the flow speed of water flows, the protrusion degree of the elastic bag bodies is adjusted through the protrusion control devices, the acting face of the water flow on the elastic bag bodies is changed, the direction of the water flow flowing through the surface of the elastic bag bodies is changed, the acting force of the water flow on the immersed tube body is changed, and the influence of the water flow on the immersed tube body can be reduced when the water flow speed is large.

The invention discloses multifunctional hydraulic fitness equipment, and relates to the technical field of hand tools. The multifunctional hydraulic fitness equipment comprises a frame body, a beam, abase, a lying plate, a first hydraulic device, a second hydraulic device and a controller; the first hydraulic device and the second hydraulic device are arranged to enable a user to apply force through the hydraulic devices during liftup and pulldown, a barbell is not needed to be lifted, thereby improving the safety in use of the fitness equipment; a user can more stably apply force during theapplication of the force, and the use effect of the fitness equipment is improved.

The invention discloses a product assembling safety floating device. The product assembling safety floating device includes an insertion driving unit and a sliding seat, wherein the insertion driving unit is in driving connection with the sliding seat, the sliding seat is provided with a guide hole, the guide hole is internally provided with a working shaft in a penetration mode, one end of the working shaft is fixedly equipped with a mounting base body, the working shaft is fixed with a limit block, an elastic element is arranged between the limit block and the sliding seat, and two ends of the elastic element are fixedly connected with the sliding seat and the limit block. The product assembling safety floating device is advantaged in that during use, a product is fixed on the mounting base body, the sliding seat is driven by the insertion driving unit to slide, when the product is inserted on a PCB, interaction between the product and the PCB is generated to make the working shaft slide in the guide hole, the elastic element is compressed, the assembling mode is more secure, the elastic element with different elastic coefficients can be selected to change the force of the product during insertion, and the safe floating effect is achieved.

The invention discloses an adjustable motor mounting mechanism with a good damping effect, and a mounting method thereof, and relates to the technical field of motor mounting. In order to solve the adjustment problem, the mechanism comprises a mounting base, the outer wall of the bottom of the mounting base is connected with a position adjusting base through four sets of adjustable damping assemblies, each adjustable damping assembly comprises a sleeve and a connecting column, the inner wall of each sleeve is wrapped with a damping pad, and the method comprises the steps that a motor is mounted on the mounting base, a first fastening bolt and a second fastening bolt are loosened, then a screw rod is adjusted, a device is fixed to the ground or a mounting frame through a mounting hole, the output shaft of a motor is coaxially connected with the input shaft of a to-be-driven part, then the second fastening bolt is locked, and the relative positions of the mounting base and a position adjusting base are fixed. According to the invention, the motor can be adjusted in multiple angles and multiple directions, so that the motor can be well matched with a to-be-driven part, and the conditions of vibration and the like caused by low coaxiality in the follow-up process are reduced.

The invention relates to a deep sea low-noise variable pump. The deep sea low-noise variable pump comprises a pump body, the pump body comprises cylinder bodies arranged at intervals, first sealing plates extending from the cylinder bodies to the intervals, plugs located between the cylinder bodies and the first sealing plates, and plunger bases connected between the first sealing plates on the two sides in a sealed mode, and the cylinder bodies, the first sealing plates, the plugs and the plunger bases form an oil cavity used for containing oil; a plunger hole is formed in the inner end faceof each cylinder body and communicates with a low-pressure inlet, and a high-pressure outlet is formed in the outer end face of each cylinder body; and a permanent magnet plunger is arranged in each plunger hole, a groove is formed in the position, close to the corresponding permanent magnet plunger, of the inner end face of each cylinder body, a rotating coil is arranged in each groove, and thrust coils are arranged on the plunger bases. The deep sea low-noise variable pump has the beneficial effects that the purpose of changing the displacement of a plunger pump can be achieved by controlling the movement speed of the permanent magnet plungers, and the stroke of single movement of the plungers can be changed by adjusting the distance between the plunger holes and the plungers so as to change the displacement of the plunger pump.

The invention discloses a special alloy pre-reactor plate spring transmission shaft structure. The special alloy pre-reactor plate spring transmission shaft structure comprises a transmission shaft, wherein the transmission shaft is provided with a shaft shoulder; a thread baffle ring is in threaded connection with an adjusting nut; a spring seat is arranged below the adjusting nut; the spring seat is buckled with the adjusting nut; a disc spring group is arranged between the thread baffle ring and the spring seat; the disc spring group abuts against the thread baffle ring and the spring seat; a foundation seat further abuts against the spring seat; the foundation seat is connected with an oil cylinder with an oil injection hole; the oil cylinder is internally provided with an oil piston; the oil piston abuts against the spring seat; the foundation seat abuts against sectional shaft sleeves; a sealing ring is arranged between the sectional shaft sleeves; the transmission shaft is provided with a thread section; and a sealing ring is arranged between a locking nut and the sectional shaft sleeves. The special alloy pre-reactor plate spring transmission shaft structure has the advantages that the sectional shaft sleeves guarantee the convenience of replacement; after the disc spring group is pressed, guarantees can be continuously provided for the sealing performance of the shaft sleeves through deformation, and the working performance of the transmission shaft is prolonged; and the size of the deformation amount is adjusted through the disc spring group so that the size of an acting force between the sectional shaft sleeves is changed.