87results about How to "To achieve the deceleration effect" patented technology

The invention relates to a multifunctional composite power cutter tower of a computer numerically controlled lathe, which comprises a group of pedestal unit, a group of cutter head unit and a group of power transmission unit; the cutter head unit is provided with a cutter with rotary cutting function; the power transmission unit is provided with a shell seat arranged outside the pedestal unit, a motor arranged on the shell seat, a driving wheel arranged inside the shell seat to rotate by the driving of the motor, and a driven wheel arranged inside the shell seat to transmit by the driving of the driving wheel at predetermined reduction ratio; and the driven wheel finally drives the cutter to work so that the cutter can cut with large torque output. In the multifunctional composite power cutter tower, the outside of the pedestal unit is provided with the shell seat, and the driving wheel and the driven wheel are provided to achieve the speed reduction effect by a complex wheel train, so the cutter obtains high torque power output to successfully carry out various rotary cutting operations.

An electromagnetism speed reduction device comprises a power supply unit, a detection unit and a control unit. The power supply unit comprises a system power source, a detection power source and a control power source, wherein the detection power source and the control power source are connected with the system power source in parallel. The detection unit comprises a detector electrically connected with the detection power source. The control unit comprises a speed reduction coil and a threshold value opening valve, and the speed reduction coil is buried below a pavement and reduces the speed of vehicles by generating an electromagnetic field when electrified. The threshold value opening valve is electrically connected with the speed reduction coil and the detector and used for judging parameters detected by the detector. The control unit and the detection unit are connected to the power supply unit in parallel in a paired mode. By generating the electromagnetic field, the electromagnetism speed reduction device reduces the speed of all the vehicles passing through the road section with the electromagnetism speed reduction device and is high in applicability.

The invention discloses an automatic back rubbing and spraying shower. The automatic back rubbing and spraying shower comprises a showing handle, wherein a shower nozzle shade is arranged at one end of the showing handle; a fixing plate is arranged in the shower nozzle shade; a shower nozzle is arranged on the fixing plate; and a water pipe is arranged in the showing handle and is communicated with the shower nozzle. The automatic back rubbing and spraying shower is characterized in that: a direct-current motor is arranged below the fixing plate; a transmission disc is arranged on the fixing plate; a back rubbing device is arranged on the transmission disc; and a motor shaft of the direct-current motor drives the transmission disc and the back rubbing device to rotate at the same time through a gear reduction mechanism. When people bathe, bath cream can be also directly poured on the back rubbing device, the back rubbing device is driven to rotate through the direct-current motor, the bath cream is directly coated on all the body without a hand, particularly on the back which cannot be touched by the hand, and then a water faucet is opened to flush, bath and rinse the human body, so flushing and rinsing functions are integrated at the same time. The automatic back rubbing and spraying shower is convenient to use and can cleanly wash the body; and the user can rub the back without assistance from other people.

The invention discloses a filtering and drying device for marsh gas purification. The device comprises a filtering tank, the filtering tank is connected with a marsh gas collection tank, marsh gas is collected from the marsh gas collection tank, generally, marsh gas in the marsh gas collection tank is extracted through a draught fan and introduced into a filtering tank, the filtering tank comprises a tank body, a partition plate which partitions the tank body vertically is arranged in the tank body, and an opening is formed in the middle of the partition plate; a gas inlet cavity is formed in the bottom of the tank body, a level-I filtering chamber is formed in the upper side of the gas inlet cavity, a level-II filtering chamber is formed above the partition plate, and a condensing and drying chamber is formed above the level-II filtering chamber. The device has the advantages of being reasonable in design and simple in structure; the independent gas inlet cavity is formed, so that gas entering the gas inlet cavity is divided into two flows, and by means of gas vents formed in a spiral air inlet pipe, a flow of gas is discharged and changed into irregular flow direction and collides with the other flow of gas, so that the speed reduction effect is achieved, natural clinoptilolite is arranged in a filter screen and serves as adsorbent, and the effect of preliminarily purifying and filtering marsh gas is achieved.

The invention discloses a device for linear control of a segmental prefabricated assembled curved bridge, which belongs to the technical field of curved bridges. The device for linear control of a segmental prefabricated assembled curved bridge comprises a linear control detection device and a detection method. The linear control detection device comprises a device base; an adjusting base is movably mounted above the device base; a main shaft is fixedly mounted at the top end of the adjusting base, three connecting rings are rotatably connected to the outer wall of the main shaft, first screwrods are in threaded connection with the interiors of the three connecting rings, positioning rods are fixedly connected to the bottom ends of the first screw rods, and connecting sleeves are rotatably connected to the positions, located below the connecting rings, of the outer wall of the main shaft. According to the device, the prefabricated arc-shaped beam body can be detected, whether the arc-shaped curve of the beam body is standard and reaches the standard or not is judged, so that curve bridge linear control is facilitated, and the device is simple in structure, convenient to operate, simple in method process and convenient to carry out.

The invention discloses a novel marsh gas pretreatment device which comprises a filter tank. The filter tank is connected with a marsh gas collection tank. Marsh gas is collected from the marsh gas collection tank, and marsh gas in the marsh gas collection tank is usually extracted through a fan and infiltrated to the filter tank. The filter tank comprises a tank body. A partition plate for dividing the tank body into an upper part and a lower part is arranged in the tank body. An opening is reserved in the middle of the partition plate. An air inlet cavity is arranged at the bottom of the tank body. A primary filter chamber is arranged on the upper side of the air inlet cavity. A secondary filter chamber is arranged above the partition plate. A condensation drying chamber is arranged above the secondary filter chamber. A vibration frame is further arranged in the air inlet cavity. The novel marsh gas pretreatment device has the advantages that design is reasonable, the structure is simple, gas entering the device is divided into two flows due to the fact that the independent air inlet cavity is arranged, one flow of gas is exhausted and changed to be in irregular flow direction through an air exhaust hole formed in a spiral air inlet pipe and then collides and interferes with the other flow of gas to achieve the speed reduction effect, natural clinoptilolite is arranged in a baffle to be used as an adsorbing agent, and the effect of primary purification and filtration on marsh gas is achieved.

The invention discloses a biogas purification device. The device comprises a filtering tank connected with a biogas collection tank, biogas is collected from the biogas collection tank, and biogas in the biogas collection tank is usually sucked out by a fan and input into the filtering tank. The filtering tank comprises a tank body, a partition board dividing the tank body into an upper part and a lower part is arranged in the tank body, and an opening is reserved in the middle of the partition board; a gas inlet cavity is formed in the bottom of the tank body, a first-level filtering chamber is arranged on the upper side of the air inlet cavity, a second-level filtering chamber is arranged above the partition board, and a droplet throwing device is arranged above the second-level filtering chamber. The biogas purification device has the benefits as follows: the design is reasonable, the structure is simple, gas entering the device is divided into two paths by means of the independently arranged gas inlet cavity, one path of gas is exhausted from exhaust holes in a spiral gas inlet pipe, flows in irregular flow directions and collides and interferes with the other path of gas, and a speed reduction effect is realized; natural clinoptilolite is arranged in a baffle to serve as an adsorption agent, and the effect of primarily purifying and filtering biogas is realized.

The invention discloses a methane purification and primary filtration device which comprises a filtration tank, wherein the filtration tank is connected with a methane collection tank; methane is collected from the methane collection tank; generally, a blower is utilized for pumping out the methane in the methane collection tank and then pumping the methane into the filtration tank; the filtration tank comprises a tank body, the tank body is internally provided with a clapboard which divides the tank body into upper and lower parts, and an opening is reserved in the middle of the clapboard; the bottom of the tank body is provided with a gas inlet cavity, the upper side of the gas inlet cavity is provided with a primary filtration chamber, and a secondary filtration chamber is formed above the clapboard. The methane purification and primary filtration device has the beneficial effects that the design is reasonable and the structure is simple; by virtue of arranging the independent gas inlet cavity, the inlet gas is divided into two branches, one branch of gas is discharged by virtue of a gas vent in a spiral gas inlet pipe, and is changed into irregular flow direction to collide and interfere with the other branch of gas so as to achieve a speed reduction effect; a filter screen is internally provided with natural clinoptiloite zeolite which serves as an adsorbent, so that a primary purification and filtration effect for the methane is achieved.

The invention discloses a garden high branch saw. The garden high branch saw comprises a saw head assembly (1), a connecting rod assembly (2) and a handle assembly (3). The saw head assembly (1) comprises a machine shell, a driving motor (1.3), a transmission mechanism and a saw blade (1.4). The driving motor (1.3) is connected with the saw blade (1.4) through the transmission mechanism. The machine shell comprises a connecting pipe (1.2) and a machine shell body (1.1) which are made of engineering plastics and connected into a whole. The driving motor (1.3) and the transmission mechanism are installed inside the machine shell body (1.1), and the connecting pipe (1.2) is connected to the upper end of the connecting rod assembly (2) in a sleeved and locked mode. The axis of the machine shell body (1.1) and the axis of the connecting pipe (1.2) intersect to form an included angle. By means of the structure, the weight of the whole high branch saw is reduced, the vibration amplitude, transmitted to the handle assembly, of the vibration produced when a saw head works is greatly reduced, and the working stability of the high branch saw is guaranteed better.

The invention relates to the technical field of circuit board manufacturing, and discloses an edge grinding device for SMT circuit board production, which comprises a millstone, blades fixedly connected to the outer side of the millstone, a rotating shaft fixedly connected to the inner wall of the middle of the millstone, a telescopic cylinder movably connected to the outer side of the rotating shaft, and an electromagnet fixedly connected to the inner wall of the middle of the telescopic cylinder. The inner wall of the telescopic cylinder is movably connected with a deceleration block and a telescopic rod. According to the edge grinding device for SMT circuit board production, the grinding disc drives the metal block to move, the metal block drives the dielectric plate to move, then the reset spring and the ball are used in cooperation, and therefore the effect of powering on and powering off the electromagnet is achieved; as the rotating speed of the grinding disc is increased, the centripetal force borne by the metal block is increased; the traction force borne by the reset spring is larger than the elasticity of the reset spring, the dielectric plate generates relative displacement, the relative area of the positive plate and the negative plate is gradually increased, the voltage between the two plates is gradually increased, the piezoresistor reaches the maximum access voltage, and the electromagnet is powered on to generate a magnetic field.

The invention relates to the field of fixed ball-cage type constant velocity universal joints of automobiles, in particular to outer ring polishing equipment for the fixed ball-cage type constant velocity universal joints of the automobiles. The equipment comprises a workbench, a driving and polishing mechanism, a translation mechanism and a rotary tool mechanism, wherein the driving and polishingmechanism, the translation mechanism and the rotary tool mechanism are installed on the workbench, the driving and polishing mechanism comprises a chuck capable of clamping the fixed ball-cage type constant velocity universal joints and a driving assembly, the bottom of the driving assembly is fixedly installed on the table board of the workbench, the chuck is horizontally arranged above the driving assembly, one end of the chuck is in transmission connection with the working end of the driving assembly, the rotary tool mechanism comprises a turning tool and a rotary driving assembly, the output end of the turning tool is in the same horizontal plane with an axis of the chuck, the bottom of the rotary driving assembly is movably arranged on the workbench, the turning tool is located abovethe rotary driving assembly, the turning tool is fixedly arranged at the working end of the rot rotary driving assembly, the translation mechanism is located on one side of the rotary driving assembly, and the translation mechanism comprises a moving plate capable of horizontally moving the rotary driving assembly in the chuck direction. The equipment is simple to operate and capable of conducting precise machining.

A bridge warning blocking device comprises warning blocks which are arranged in a bilateral symmetry mode. First ground thorn grooves are formed in the end faces of the sides, close to each other, ofthe warning blocks. Ground thorn devices are arranged in the first ground thorn grooves, first warning grooves are formed in the end faces of the sides, away from each other, of the warning blocks, lamplight warning devices are arranged in the first warning grooves, first blocking grooves are formed in the end faces of the sides, close to each other, of the warning blocks, and intercepting devicesare arranged in the first blocking grooves; the device adopts a ground thorn mechanism and an intercepting net mechanism at the same time; when the ground thorn mechanism punctures a tire, a large amount of gas in the tire cannot be released, so that the stability of a vehicle after the vehicle breaks through the tire is ensured; meanwhile, the device is further provided with a lamplight warningmechanism, safety at night is guaranteed, and the device is simple in structure, good in effect, low in cost and suitable for being popularized in various toll stations, bridge and road construction units and the like.

A pseudo-classic wooden ox and gliding horse transportation vehicle comprises an ox head and an ox body. The ox head comprises ox horns, the lower portions of which are connected with a braking apparatus. The ox body comprises an ox rib, a support is arranged on the ox rib, a steering control apparatus comprising an ox qiu zhou (caster shaft) is arranged on the support, and the ox qiu zhou is connected with a steering disc which is connected with a steering plate. A steering wheel is arranged at the lower end of a front supporting foot, a locking mechanism comprising an ox tongue is arranged on the front supporting foot, one end of the ox tongue is connected with a square-hole plate, and the front supporting foot penetrates a square hole in the square-hole plate to be fixed. Location holes are formed in the bottom of the square-hole plate and are matched with location pins. The other end of the square-hole plate is connected with an ox tongue rod, an inclined plane is formed at the other end of the ox tongue rod, and the end of the ox tongue rod, where the inclined plane is formed, penetrates a straight square hole in a vertical snapping block. A groove is formed in a front cross shaft and is matched with the vertical snapping block. A brake mechanism comprising a stepping mechanism is arranged in the middle of the ox rib, one end of the stepping mechanism is connected with a front gear, and the front gear is matched with a rear gear which is connected with outer rear wheels externally. A lower box is arranged on the rear portion of the ox rib, an upper box is arranged on the lower box, and a cushion block is arranged at the bottom of the lower box.

The invention discloses a marsh gas purification, absorption and filtration device. The device comprises a filtering tank, the filtering tank is connected with a marsh gas collection tank, marsh gas is collected from the marsh gas collection tank, generally, marsh gas in the marsh gas collection tank is extracted through a draught fan and introduced into a filtering tank, the filtering tank comprises a tank body, a partition plate which partitions the tank body vertically is arranged in the tank body, an opening is formed in the middle of the partition plate, and the opening is communicated with a gas channel of a speed reduction chamber above the opening; a gas inlet cavity is formed in the bottom of the tank body, a level-I filtering chamber is formed in the upper side of the gas inlet cavity, and a level-II filtering chamber is formed above the partition plate. The marsh gas purification, absorption and filtration device has the advantages of being reasonable in design and simple in structure; the independent gas inlet cavity is formed, so that gas entering the gas inlet cavity is divided into two flows, and by means of gas vents formed in a spiral air inlet pipe, a flow of gas is discharged and changed into irregular flow direction and collides with the other flow of gas, so that the speed reduction effect is achieved, natural clinoptilolite is arranged in a filter screen and serves as adsorbent, and the effect of preliminarily purifying and filtering marsh gas is achieved.

The invention relates to a speed limiting device of a household electric bicycle. The speed limiting device of the household electric bicycle comprises a fixed outer drum and a rotating part consisting of four same steel balls corresponding to four same springs and a center shaft, and is characterized in that the four same springs are respectively fixed to a cross-shaped rotating frame on the periphery of the center shaft positioned in the fixed outer drum; the four same steel balls are respectively fixed to the four same springs. After the adoption of the scheme, when the speed of the household electric bicycle is accelerated continuously, the rotating speed of the center shaft is accelerated continuously, the springs fixed to the cross-shaped rotating frame on the periphery of the center rotating shaft and the steel balls are rotated together; the speed is higher, the centrifugal force of the steel balls is higher, and the springs are elongated continuously so that the steel balls are in contact with the outer drum; as the outer drum is fixed, the steel balls move relative to the outer drum, and an effect of reducing the speed is achieved by friction.

The invention discloses a preparation method of a composite degradable film. The degradable film comprises a protective layer, a bonding layer and a degradation layer from top to bottom, wherein a grinding device comprises a machine shell; a transmission mechanism is installed on the machine shell. A heating mechanism is arranged in the machine shell. The heating mechanism is connected with the transmission mechanism, the bottom of the transmission mechanism is in transmission connection with a driven mechanism, the driven mechanism is connected with a grinding mechanism, an opening and closing mechanism matched with the transmission mechanism is arranged in the machine shell, and one side of the opening and closing mechanism is connected with a liquid outlet pipe. An enough heating spacecan be provided for the heating mechanism through the arranged upper cavity, and an enough space can be provided for transmission of the transmission mechanism and the driven mechanism through the arranged lower cavity; opening and closing of the system can be achieved through rotation of the transmission mechanism through the arranged opening and closing mechanism, and therefore, the amount of amixed solution in the storage box is controlled.

The invention discloses a traction machine for electric power dispatching power grid construction. The traction machine structurally comprises a conveying wheel, a control box, a support frame, a rolling wheel and a shaft box, wherein the conveying wheel is arranged at the front end of the control box and is movably connected with the control box, the bottom end of the control box is welded to thetop end of the support frame, the rolling wheel is located below the shaft box, the rear end of the shaft box is arranged at the front end of the conveying wheel, and the shaft box is movably connected with the conveying wheel. According to the traction machine, partial structure of the traction machine is improved, the rotating speed of the traction machine can be detected through the rotating shaft of the conveying wheel, so that when the rotating speed is too high, the speed is limited, so that the phenomenon that cables fall off and become disorderly due to the fact that the wire conveying speed of the conveying wheel is too fast is prevented, meanwhile, the adding mode of wheel shaft lubricating fluid is improved, so that when the wheel shaft lubricating fluid is added, the phenomenon that the cables are disassembled for adding the wheel shaft lubricating fluid and then installed is avoided, so that the traction machine is more convenient to use.

The invention discloses a preparation device and method for a small-sized culture dish and belongs to the technical field of preparation for small-sized culture dishes. The preparation device for thesmall-sized culture dish comprises a device base. Supporting columns are fixedly installed on the left and right ends of the outer wall of the top of the device base, the top ends of the supporting columns are fixedly provided with a top plate, a hydraulic cylinder is fixedly installed on the outer wall of the bottom of the top plate, and a first connection plate is movably installed below the hydraulic cylinder. Connection rods are fixedly connected to the outer walls of the left and right sides of the first connection plate, and the outer walls of the supporting columns are movably providedwith slide blocks. Three hanging rods are fixedly connected to the outer wall of the bottom of the first connection plate, and an upper module is fixedly connected to the end, away from the first connection plate, of each hanging rod. The preparation device has the advantages of being simple in structure and convenient to operate, the cost of the device is lowered, the preparation method is simplein process, the production efficiency is improved, large-batch production can be achieved, convenience is provided for die assembly and die opening, the culture dish is conveniently taken out, and burrs are conveniently taken out.

The invention discloses a centrifugal liquid throwing marsh gas pretreatment device. The centrifugal liquid throwing marsh gas pretreatment device comprises a filter tank. The filter tank is connected with a marsh gas collecting tank, marsh gas is collected from the marsh gas collecting tank and is usually sucked out of the marsh gas collecting tank through a draught fan, and the marsh gas is injected into the filter tank. The filter tank comprises a tank body, a partition plate partitioning the tank body vertically is arranged in the tank body, and an opening is reserved in the middle of the partition plate. A gas inlet cavity is formed in the bottom of the tank body, a primary filter chamber is arranged on the upper side of the gas inlet cavity, a secondary filter chamber is arranged above the partition plate, and a throwing dripping device is arranged above the secondary filter chamber. The centrifugal liquid throwing marsh gas pretreatment device has the advantages that the design is reasonable, and the structure is simple; the independent gas inlet cavity is formed, so that inlet gas is partitioned into two paths, wherein one path of gas is discharged out through gas discharging holes formed in a spiral gas inlet pipe, becomes irregular in flow direction, and collides and interferes with the other path of gas to achieve the speed reducing effect; natural clinoptilolite is arranged in a baffle to serve as an adsorption agent and performs the effects of primary purification and filtration on the marsh gas.

The invention relates to the technical field of flight vehicles, in particular to a power system structure of a coaxial dual-rotor-wing unmanned aerial vehicle. The power system structure of the coaxial dual-rotor-wing unmanned aerial vehicle is used for solving the problems of low efficiency and poor stability of an existing coaxial dual-rotor-wing unmanned aerial vehicle power system. The powersystem structure of the coaxial dual-rotor-wing unmanned aerial vehicle comprises a miniature turboshaft engine, a main stage speed reducer and a two-stage speed reducer, wherein an output shaft of the main stage speed reducer is connected with an input shaft of the two-stage speed reducer, and the main stage speed reducer comprises a fuel oil lubricating system; the two-stage speed reducer comprises an input shaft, an inner output shaft assembly and an outer output shaft assembly, and the rotation direction of the inner output shaft assembly is opposite to the rotation direction of the outeroutput shaft assembly; and the two-stage speed reducer further comprises a lubricating oil lubricating system. By adopting the miniature turboshaft engine, the main stage speed reducer and the two-stage speed reducer, efficient output of power is realized, and the structural layout is simplified. The main stage speed reducer adopts the fuel oil lubricating system, the two-stage speed reducer adopts the lubricating oil lubricating system, cooling of the speed reducers is effectively realized, and stable work of the speed reducers is achieved.

The invention discloses a traction machine for electric power dispatching power grid construction. The traction machine structurally comprises a conveying wheel, a control box, a support frame, a rolling wheel and a shaft box, wherein the conveying wheel is arranged at the front end of the control box and is movably connected with the control box, the bottom end of the control box is welded to thetop end of the support frame, the rolling wheel is located below the shaft box, the rear end of the shaft box is arranged at the front end of the conveying wheel, and the shaft box is movably connected with the conveying wheel. According to the traction machine, partial structure of the traction machine is improved, the rotating speed of the traction machine can be detected through the rotating shaft of the conveying wheel, so that when the rotating speed is too high, the speed is limited, so that the phenomenon that cables fall off and become disorderly due to the fact that the wire conveying speed of the conveying wheel is too fast is prevented, meanwhile, the adding mode of wheel shaft lubricating fluid is improved, so that when the wheel shaft lubricating fluid is added, the phenomenon that the cables are disassembled for adding the wheel shaft lubricating fluid and then installed is avoided, so that the traction machine is more convenient to use.

The invention discloses a secondary filtering device for marsh gas purification. The secondary filtering device comprises a filtering tank, wherein the filtering tank is connected with a marsh gas collecting tank; marsh gas is collected and taken from the marsh gas collecting tank; the marsh gas is usually sucked out of the marsh gas collecting tank by a fan and is pumped into the filtering tank;the filtering tank comprises a tank body; a separation plate for separating the upper and lower parts of the tank body is arranged in the tank body; an opening is reserved in the middle of the separation plate; the bottom of the tank body is provided with a gas inlet cavity; a primary filtering chamber is arranged at the upper side of the gas inlet cavity; a secondary filtering chamber is arrangedabove the separation plate; a condensation drying chamber is arranged above the secondary filtering chamber; a vibration frame is also arranged at the inside. The secondary filtering device has the beneficial effects that the design is reasonable; the structure is simple; through the arrangement of the independent gas inlet cavity, the inlet gas is divided into two strands; through exhaust holesformed in a spiral gas inlet pipe, one strand of gas is exhausted and becomes gas in an irregular flow direction; the other strand of gas mutually collides and interferes to achieve a speed reductioneffect; natural clinoptilolite is arranged in a baffle plate as an adsorbent; the effect of primary purification and filtering on the marsh gas is achieved.

The invention relates to the technical field of medical rehabilitation machinery, and discloses an auxiliary instrument protection device for leg medical rehabilitation, which comprises a shell, a rotating wheel is movably connected to the middle of the shell, an electromagnet is fixedly connected to the inner wall of the middle of the rotating wheel, a foot bar is movably connected to the front of the rotating wheel, and a piston is movably connected to the inner wall of the middle of the rotating wheel. According to the auxiliary instrument protection device, the rotating wheel drives the centrifugal block to move, the centrifugal block drives the dielectric plate to operate, and the positive plate and the negative plate are matched for use, so that the effect of detecting the rotating speed of the rotating wheel is achieved; since the centripetal force borne by the centrifugal block in the initial stage is smaller than traction force of the reset spring and does not causes movement, the relative area, being the minimum value, between the positive plate and the negative plate is constant; therefore, as the rotating speed of the rotating wheel increases, the centripetal force borne by the centrifugal block is larger than the traction force of the reset spring, and at the moment, the centrifugal block moves outwards along the inner wall of the movable groove, and the voltage between the two polar plates is changed.

The invention relates to the technical field of industrial engineering transportation, and discloses an electromagnetic-damping-principle-based industrial engineering transportation lifting machine protection rotating shaft. The electromagnetic-damping-principle-based industrial engineering transportation lifting machine protection rotating shaft comprises a shell, wherein the front surface of the shell is fixedly connected with a magnetic ring, the inner wall of the middle portion of the magnetic ring is movably connected with a rotating shaft, and electric push rods are fixedly connected with the inner wall of the middle portion of the rotating shaft. According to the electromagnetic-damping-principle-based industrial engineering transportation lifting machine protection rotating shaft, centrifugal blocks are driven to move through the rotating shaft, the centrifugal blocks drive dielectric plates to move, then a speed reduction effect is achieved through cooperative use of reset springs and negative plates, at the moment, a coil is in a completely-closed state, magnetic poles of the coil and the magnetic ring generate motion of cutting magnetic induction lines, due to the fact that magnetic flux penetrated by the coil changes, the coil generates induction current, and a magnetic field generated by the current can hinder relative motion of the rotating shaft, so that the purpose of reducing the speed of the rotating shaft is achieved.

The invention discloses a speed-adjustable damping supporting device. The speed-adjustable damping supporting device comprises a positioning box, wherein the positioning box comprises a first shell and a second shell which are fixedly connected; the first shell and the second shell are provided with accommodating cavities matched with each other; a first boss is arranged on the inner side of the first shell, and the first shell is further provided with a convex part; the convex part is provided with an opening, and a stator matched with the first boss is arranged in the corresponding accommodating cavity; and a rotor which rotates relative to the stator is arranged between the stator and the second shell, a damper mechanism is arranged between the first shell and the stator and acts on therotor, a damping shaft with a hollow structure is arranged on the rotor, and a unidirectional bearing penetrates through the inner part of the damping shaft. According to the speed-adjustable dampingsupporting device, the stator, the rotor and the damper mechanism are packaged in the positioning box, and the rotor is adjusted through the damper mechanism and the stator, so that the speed adjusting function of the damping supporting device is realized.

A wind power generation shaft braking device comprises a shaft. A locating ring is arranged outside the shaft and provided with a fastening bolt. The fastening bolt is connected with a solenoid valve. The solenoid valve is connected with a controller. The fastening bolt is controlled to move through the solenoid valve so that the shaft can be clamped. The wind power generation shaft braking device has the advantage of quick deceleration.

The invention discloses a pair of electric pruning shears. After the side, facing toward a shear blade (5), of an output gear (3) is sequentially connected with an abrasion-resisting plate (4) made of abrasion-resisting engineering plastic, a gasket (8) and a belleville spring (9), and the output gear (3) and the abrasion-resisting plate (4), the abrasion-resisting plate (4) and the gasket (8) as well as the gasket (8) and the belleville spring (9) abut against each other respectively through connection of a locking nut (7) and an eccentric block outer sleeve (11). By the adoption of the structure, the abrasion-resisting plate made of the abrasion-resisting engineering plastic high in abrasion resistance is adopted for being connected with the output gear in a contacting mode, damage to the abrasion-resisting plate caused by friction generated by slipping of the output gear can be reduced, service life can be greatly prolonged, and the speed reducing effect can be achieved within short time.