234results about How to "Stable and reasonable structure" patented technology

The invention relates to the fields of intelligent robot, in particular to a multi-axis propulsion water search and rescue robot. The multi-axis propulsion water search and rescue robot comprises a central control platform, at least three downward projecting brackets are arranged along the circumferential direction of the central control platform, hinge cable devices are arranged on each bracket, hinge cable devices are hoisted with foldable lifesaving net under the central control platform through cables, a power float device is also connected at the lower end of each bracket, a controller is arranged on the central control platform, and the controller is communicated with the hinge cable device and a power float device. The multi-axis propulsion water search and rescue robot has various motion modes, such as hovering, advancing, retreating and 360 DEG free steering in water, has high stability, has high ability to withstand wind and wave, and can be a good alternative to the traditional rescue way; meanwhile the design of the foldable lifesaving net realizes the purpose of fast and safe lifesaving, can realize multiple tasks such as water search and rescue, the water surface monitoring, the water measurement and control and the like in complicated water area and bad weather condition, practicability is high, flexibility is good and popularization prospect is good.

The invention discloses a unilateral cantilever type water survey platform system, comprising a working boat, a unilateral cantilever survey platform, a boring tower and equipment. The working boat isprovided with a plurality of windlasses, at least two shaped steels are arranged on the deck of the working boat, a plurality of supports are arranged on the shaped steels in a crossing way and extends out one side of the boat body, floor board and channel steel are laid on the supports, wherein the position of channel steel corresponds to the position of the shaped steel, the channel steel is infixed connection with the support and the shaped steel, and the parts of the support and the floor board, extending out the boat body, are the working area cantilever sides. The boring tower is arranged on the unilateral cantilever survey platform. The equipment, comprising the boring tower inside the working area cantilever side and the slurry pumps on the boat body, is arranged on the survey platform. The invention is simple, has low cost, and can be used for geotechnical coring, sampling and in situ testing when exploring underwater, thereby ensuring exploration goes smoothly under any environments and conditions.

The invention discloses a landscaping tree fixing and righting device and a use method thereof. The landscaping tree fixing and righting device is composed of landscaping trees, a fixing and righting device and a central control system, wherein the fixing and righting device sleeves an outer diameter of each landscaping tree, is placed on a horizontal ground, and is free to adjust a lifting height; the central control system is located on one side of the fixing and righting device; the fixing and righting device is applicable to tree diameters of different landscaping trees. The landscaping tree fixing and righting device provided by the invention is firm and reasonable in structure, convenient and rapid to use, high in righting rate and applicable to different landscaping trees.

The invention relates to the field of a code device, in particular to a code apparatus which includes a pedestal; a shaft tube is arranged on the pedestal; a units lettered dial, a tens digit lettered dial, a hundreds digit lettered dial and a thousands lettered dial are arranged on the shaft tube in turn from left to right; ratchet gear wheels are respectively arranged on the units lettered dial, the tens digit lettered dial, the hundreds digit lettered dial and the thousands lettered dial; a plurality of ratchets and carry slots are arranged on the ratchet gear wheels; a rotating shaft is arranged in the shaft tube; one end of the rotating shaft is provided with a striking gear; the two ends of the shaft tube are respectively provided with a first dial wheel plate and a second dial wheel plate; the lower ends of the first dial wheel plate and the second dial wheel plate are provided with dial wheel shafts; a units dial wheel rod, a tens digit dial wheel rod, a hundreds digit dial wheel rod and a thousands dial wheel rod are arranged on the dial wheel shaft from left to right in turn; a pressure rod shaft is arranged on the pedestal; the pressure rod shaft can be provided with a first pressure rod, a second pressure rod, a third pressure rod and a fourth pressure rod in turn from left to right. The code apparatus of the invention can carry out code on various coding digits, changes the coding digits without dismounting the code apparatus and has reasonable and firm structure.

The invention discloses a garden tree fixing device with an insecticidal system and a working method of the garden tree fixing device. The garden tree fixing device is composed of a fixing and locking sleeve, locking screws, fixing blocks, fixing ejecting rods, telescopic springs, the insecticidal system, a light energy collecting cell panel, H-shaped supports, angle iron stabilizing plates, expansion screws and a central control system. The two H-shaped supports are symmetrically arranged on the two sides of a garden tree to be fixed and fixed to the ground through the expansion screws, and then the fixing and locking sleeve is arranged on a trunk in a sleeving mode and connected with the two H-shaped supports through the telescopic springs, and can automatically and elastically stretch and contract along with growth of the tree. Meanwhile, the light energy collecting cell panel provides a power supply for the insecticidal system, and the insecticidal system can attract injurious insects after emitting light and can electrocute the injurious insects dead. According to the garden tree fixing device with the insecticidal system and the working method of the garden tree fixing device, the structure is firm and reasonable, use is convenient and fast, diverse functions are achieved, cost is low, and the application range is wide.

The invention relates to a novel stand column type cantilever crane which comprises a base. Universal sliding wheels and connecting plates are arranged on the base. Supporting legs are connected with the connecting plates. The base is connected with a stand column through a lifting bottom table and a lifting device. The stand column is provided with a motor fixing seat and a drive motor. The drive motor is connected with a fixing buckle A. The fixing buckle A is connected with a fixing buckle B through screw rods and nuts. The fixing buckle B is connected with a transverse rod which is connected with an inclined rod. The lower end of the inclined rod is provided with a longitudinal rod A, a longitudinal rod B, a longitudinal rod C and a longitudinal rod D. The longitudinal rod D is connected with a sliding rail and a sliding cable. The sliding cable is connected with a lifting hook through a steel wire rope. The lower end of the longitudinal rod D is connected with a cantilever beam. The cantilever beam is connected with an electric block and is connected with a connecting base through a connecting pillar. The connecting base is connected with a sliding block and an annular guide rail. A clamping hook is hinged to the connecting base, and an annular clamping rail is connected with the clamping hook. The novel stand column type cantilever crane has the beneficial effects of being reasonable in design, comprehensive in function, stable in structure, wide in use range, easy and convenient to operate and convenient to demount and mount.

The invention discloses a straightening device for preventing garden trees from obliquely growing and a work method thereof. The straightening device for preventing garden trees from obliquely growing consists of a straightening device, garden trees and a control center, wherein the straightening device is arranged on the surface of the outer diameter of the garden trees in a sleeving way; the straightening device is arranged on the ground level; the control center is positioned at one side of the ground garden trees; the straightening device can also be applicable to different tree diameters of the garden trees; the straightening device can freely regulate the height position. The straightening device for preventing garden trees from obliquely growing and the work method of the straightening device have the advantages that the structure is firm and reasonable; the use is convenient and fast; the straightening rate is high; the straightening device is suitable for being used for different garden greening trees.

The invention provides an elevator rolling wheel guide shoe installed on an elevator guide rail. The elevator rolling wheel guide shoe comprises a shoe seat connected with an elevator car and a pair of buffering rolling wheel devices symmetrically installed on the shoe seat. Each buffering rolling wheel device comprises an L-shaped support, a supporting plate, a wheel seat and a rolling wheel, wherein the supporting plate is fixed to the inner side of the L-shaped support, the wheel seat is fixed to the supporting plate, and the rolling wheel is installed on the wheel seat. The rolling wheels of the pair of buffering rolling wheel devices are mutually and symmetrically clamped on tracks on two sides of the elevator guide rail with the guide rail as a symmetrical shaft. The outer side of the cross side and the outer side of the vertical side of each L-shaped support are connected with the shoe seat through bolts. The bolts are sleeved with springs and the springs are located between the L-shaped support and the shoe seat. The problem that the installing accuracy of a traditional guide shoe is difficult to control is solved. In addition, due to long-term usage, the guide rail is abraded, the springs play a self-adapting function and can still abut against the guide rail, and stable running of an elevator is ensured.

The invention provides a film cutting device comprising a machine frame and a conveyer belt assembly. The conveyer belt assembly comprises a first rolling shaft, a second rolling shaft and a conveyerbelt. The conveyer belt is connected to the first rolling shaft and the second rolling shaft in a sleeving manner. The film cutting device further comprises a motor, a gear transmission assembly, pullrods, a cutter, a connection rod mechanism and a one-way bearing. An output shaft of the motor is connected with the input end of the gear transmission assembly. One end of each pull rod is rotationally connected with the gear transmission assembly in an eccentric manner. The other end of each pull rod is rotationally connected with the upper end of the cutter. The cutter is located above the conveyer belt. The input end of the connection rod mechanism is connected with the upper end of the cutter. The output end is connected with the first rolling shaft through the one-way bearing. The motoris fixed to the machine frame. The motor drives the cutter to move up and down through the gear transmission assembly and the pull rods, the first rolling shaft is driven to conduct intermittent rotation through the connection rod mechanism and the one-way bearing, and the two actions of film cutting and feeding are achieved. The film cutting device is simple in system and saves energy.

The invention discloses a short-wave full-band monopole antenna, which at least includes a cage dipole, including a plurality of dipole wires extending longitudinally, and a dipole ring perpendicularly intersecting the multiple dipole wires, the multiple dipole wires A cage structure is formed with the vibrator ring, and an insulating support erected on the ground is connected to the lower end of the cage vibrator; a mast is longitudinally arranged inside the cage vibrator and runs through the cage vibrator, so that Both ends of the plurality of vibrator wires are connected to the mast; at least one folded vibrator ground wire with a specified length is connected to the top of the cage vibrator at one end and grounded at the other end. The invention improves the bandwidth of the antenna, realizes the ultra-wide bandwidth full-band operation of 5.9MHz-21.85MHz, enhances the omnidirectional emission capability of the ground wave, can effectively prevent lightning damage, significantly improves the safety, and has a wide application range.

The invention discloses a finger jointed plate floor, which comprises a decorating wood veneer, a wood veneer, a finger jointed plate, a wood veneer and a decorating wood veneer in sequence from the top to the bottom, wherein the fiber length direction of each wood veneer and the length direction of the finger jointed plate form a criss-cross structure; the fiber length direction of each wood veneer and the fiber length direction of an adjacent wood veneer form a criss-cross structure; each wood veneer is provided with at least two through caulking grooves along a direction vertical to the fiber length direction of the wood veneer; the caulking grooves cut each wood veneer and go deep into the finger jointed plate; panel strips are arranged in the caulking grooves; and the surfaces of the panel strips are flushed with the surfaces of the wood veneers. The floor has high deformation resistance and remarkable meaning; the static bending strength and elastic modulus of the floor in the width direction are 7-9 MPa and 7,000-9,000 GPa respectively; and an unexpected technical effect is achieved.

The invention discloses a nursing bed with a defecation device, which comprises a bed frame and a bed mattress arranged on a first beam and a second beam. The mattress is provided with a defecation hole, the bed also comprises a commode holder frame with an inside commode and a plurality of swing rods, wherein the upper end of the frame is hinged on the first beam and the second beam; one end of an electric push rod is fixed on a bed frame, other end is hinged with one end of a first joint, the other end of the first joint is fixed at one end of a rotating shaft of a defecation hole plug frameprovided with a defecation hole plug; the other end of the rotating shaft is fixedly connected with one end of a second joint, the other end of the second joint is hinged with one end of a connectingrod, the other end of the connecting rod is hinged with a middle lug of a drive block of the commode holder frame, one end of the drive block of the commode holder frame is hinged with the bed frame,the other end of the drive block of the commode holder frame is provided with push blocks arranged on a swing bar to make the top of the commode pass through the defecation hole and contact the buttock of a defecator. The bed is simple in structure and the cleaning feeling and comfort feeling are strong.

The invention discloses continuous slab cutting equipment. The continuous slab cutting equipment comprises a rack, a movement bracket, a transmission unit and a cutting unit, wherein the movement bracket is supported on the rack and can do a linear reciprocating motion on the rack, the transmission unit is used for transmitting materials and is connected with the rack and the movement bracket in series, the cutting unit is used for cutting the materials, and the cutting unit is supported on the movement bracket and can do a linear reciprocating motion along with the movement bracket. According to the continuous slab cutting equipment, the continuous slab is accurately cut to the required length in a cutting mode by adopting a cutter, so that shavings are effectively prevented from splashing, and the quality of shaving boards is increased.

The invention relates to a material rack component for a laser cutter. A transmission clamping hook is arranged on the front end surface of a material rack frame; a fixed hook is arranged on the rear end surface of the material rack frame; positioning plates are arranged on a group of two adjacent side surfaces of the material rack frame; adjusting bolts are matched with the upper part of the positioning plate by threads; a supporting grating plate is inserted in a slot hole at the internal side of the material rack frame; and rollers are arranged on two external side surfaces of the material rack frame. The material rack component has a stable and reasonable structure, can be operated simply, saves the cost, and effectively improves the cutting precision of a workpiece and the using efficiency of equipment.

The invention relates to laser cutting equipment. The laser cutting equipment comprises an XY supporting frame, a cutting bed, a vertical floating mechanism, a laser generation assembly, an X-axis movement mechanism, a Y-axis movement mechanism and a laser cutting assembly, the cutting bed can slide up and down on the vertical floating mechanism, the laser generation assembly is fixedly installed at the top of the XY supporting frame, the laser cutting assembly can freely move on an XY plane which is located above the cutting bed and composed of the X-axis movement mechanism and the Y-axis movement mechanism, laser generated by the laser generation assembly enters a laser cutting head of the laser cutting assembly, the laser cutting head emits laser to a to-be-cut object located on a machining station on the cutting bed to achieve cutting operation, and a feeding port and a discharging port are formed in the front end and the rear end of the cutting bed correspondingly. The equipment is compact in structure, small in size, easy to install and use, low in operation cost and labor cost, low in environment requirement and suitable for being popularized and used in vast small and medium-sized enterprises.

The invention relates to a pump suction type marine product exploring and catching device for marine resource exploration and fishery catching. The technical scheme is as follows: the device consistsof a frame, a catching mechanism, a propelling system, a conveying system and an image acquisition system, wherein the frame is composed of frame pillars, horizontal cross beams and a frame base; propellers of the propelling system are assembled at four corners of the top end of the upper side of the frame through motor supports; a metal net is mounted on a catching collecting box of the conveyingsystem and assembled between the horizontal cross beams of the frame, a horizontal suction pipe is mounted at the bottom end of the frame, and a suction pump is connected with the catching collectingbox through a vertical suction pipe; cameras of the image acquisition system are assembled on the frame pillars respectively; a steering mechanism of the catching mechanism is connected with a mechanical arm through a steering engine support, and the whole catching mechanism is fixed on the frame base by metal pillars. The device adopts the four-degree-of-freedom mechanical arm and can work in complex environments in water; by use of the suction pump device, the working efficiency is improved. The device is reasonable in structure and the labor cost is reduced.

The invention relates to the technical field of fabricated buildings, and discloses a beam-column structure for anti-seismic support of a fabricated building. The structure comprises a bearing column, wherein a reinforcing steel bar frame is fixedly mounted in the bearing column, and avoiding grooves are formed in the top of the bearing column; and four first reinforcing steel bar strips extending into the avoiding grooves are fixedly installed in the bearing column, a fixing base is fixedly installed at the bottoms of the inner walls of the avoiding grooves, and four fixing feet welded to the four first reinforcing steel bar strips are fixedly installed on each of the left side and the right side of the fixing base. According to the beam-column structure for the anti-seismic support of the fabricated building, beams and columns can be effectively fixed, assembly operation is facilitated, the pouring amount is relatively small, the time and energy required by beam-column assembly can be reduced, meanwhile, ground vibration can be effectively buffered and blocked, upward transmission of the vibration is avoided, the structural stability of the fabricated building is improved, mutual impact between structures is avoided, and the service life is prolonged.

The invention discloses a stair climbing wheelchair for disabled people and an automatic stair climbing method thereof. The stair climbing wheelchair comprises a supporting plate, a balancing device fixedly arranged on the upper end face of the supporting plate, two supporting columns fixedly arranged on the lower end face of the supporting plate, a cross beam fixedly arranged below the two supporting columns, a placement cavity fixedly formed in the cross beam, a rotating shaft rotationally arranged in the placement cavity and gear device assemblies symmetrically arranged on the two rotatingshafts, wherein each gear assembly comprises stair climbing devices symmetrically arranged at the two ends of the rotating shaft and anti-skid devices arranged on the inner sides of the stair climbingdevices. By arranging a displacement sensor, a worm and other devices, the angle of a seat can be automatically adjusted when the wheelchair climbs stairs, and the seat and the ground are kept horizontal.

Disclosed is a compression roller device capable of enabling a round pipe belt conveyor to be adjusted into a circle. A compression roller support of a transition frame has the section which is of a rectangular structure, and the compression roller support is formed by connecting profile steel. A separation plate is arranged in the middle. A compression roller seat is installed on the separation plate and is of a U-shaped structure. A horizontal compression roller is installed at the bottom of the compression roller seat. Inclined columns are arranged on the two sides of the compression roller seat. Transverse support plates are arranged outside the inclined columns. The inclined columns are provided with a plurality of side compression roller adjusting holes. Side compression roller adjusting plates are installed through the side compression roller adjusting holes and are provided with angle adjusting holes matched with the side compression roller adjusting holes. Side compression rollers are installed on the side compression roller adjusting plates. The installing angles of the side compression rollers can be changed through different matching of the side compression roller adjusting holes in the inclined columns and the angle adjusting holes in the side compression roller adjusting plates. The compression roller device capable of enabling the round pipe belt conveyor to be adjusted into a circle has the following advantages that (1) adjusting is convenient, and attaching of the compression rollers and tape is achieved by adjusting the angles of the side compression roller adjusting plates; and (2) the structure is firm and reasonable, and shaking caused by large running resistance is avoided.

The invention relates to the technical field of machine tool machining and discloses an adjustable locating interference tool shank and an adjusting method thereof. The tool shank comprises a cone part and a cylinder part, wherein the cone part is used for being fixedly installed in a conical hole in the front end of a machine tool spindle; the rear end of the cylinder part is provided with an adjusting section which is sleeved with a first adjusting ring; the first adjusting ring can be moved axially on the adjusting section for adjustment; the first adjusting ring is used for backward jacking the front end face of the spindle; the cylinder part is provided with an outer thread which is used for threaded connection with a second adjusting ring; and the second adjusting ring can be moved axially on the cylinder part for adjustment and used for backward jacking the first adjusting ring. The tool shank is stable and reasonable in structure and low in cost, the first adjusting ring can beconveniently and quickly adjusted to make contact with and jack the front end face of the spindle, the adjustment efficiency is high, the tool shank has good adaptability to different machine tools and different clearance values, the situation that a large amount of match grinding work is carried out in a targeted mode is avoided, the labor intensity of workers is relieved, and the mounting efficiency is improved.

The invention relates to the technical field of container freight loading and unloading vehicles and provides a large-sized loading and unloading truck for a container. The large-sized loading and unloading truck for the container comprises a loading and unloading truck body, a lifting frame, a rotating accessories, two fork carriers, two forks, a side moving driving device, a connecting seat andtwo groups of guide shafts; the two groups of guide shafts are correspondingly arranged at the left part and the right part of the front surface of a rotating frame; the two forks are correspondinglyand fixedly arranged on the fork carriers; the two ends of the connecting seat are correspondingly and fixedly connected to the two fork carriers; the two fork carriers are correspondingly arranged onthe two groups of guide shafts in a slideable manner; the side moving driving device is arranged on the front surface of the rotating frame; an output shaft of the side moving driving device is connected with the connecting seat and drives the connecting seat to be able to move on the rotating frame from left to right in a reciprocating manner so as to drive the two fork carriers to simultaneously slide on the two groups of guide shafts from left to right in a reciprocating manner; and the side moving driving device is connected to and controlled by the loading and unloading truck body. According to the large-sized loading and unloading truck for the container, the problem that an existing large-sized loading and unloading truck cannot integrally rotate and tip over medium-sized and large-sized containers to load and unload goods and cannot load and unload the whole container is solved.

The invention relates to a wear-resistant corrosion-resistant impeller for a centrifugal pump. The impeller comprises blades, an impeller disc, a front cover plate and a rear cover plate, the blades are arranged on the periphery of the impeller disc in a sleeving mode, the roots of the front cover plate and the rear cover plate are fixedly arranged on the impeller disc, the plate surfaces of the front cover plate and the rear cover plate cover the middle parts of the two sides of the blades correspondingly, the front cover plate and the rear cover plate can play a role in reinforcing the blades; and the impeller disc, the front cover plate and the rear cover plate are all made of wear-resistant alloy materials, the blades are made of silicon carbide ceramic materials, and the outer surfaces of the blades, the impeller disc, the front cover plate and the rear cover plate each are coated with a layer of corrosion-resistant coating. The impeller for the centrifugal pump is simple and reasonable in structure, easy to manufacture and stable in work, has excellent wear resistance and corrosion resistance and is long in service life.

The invention discloses a showcase anti-explosion box. The showcase anti-explosion box comprises a showcase body made of glass material, a box body communicated with the lower part of the showcase body, an pneumatic fast closing-opening mechanism arranged in the box body for controlling the closing and opening of the communicating part between the box body and the showcase body, and a control system for controlling the pneumatic fast closing-opening mechanism to operate, wherein the communicating part between the box body and the showcase body can be closed and opened. The invention also discloses a realizing method of the showcase anti-explosion box. The box body used for safeguard is arranged under the showcase body, a danger signal (for example, showcase glass is broken) is detected by the control system, the pneumatic fast closing-opening mechanism arranged in the box body is controlled by the danger signal to fast open the top of the box body so as to enable valuable show objects in the showcase body to fall into the box body, and then the box body is fast closed to realize the active defensive action, so the safety of the valuable show objects is fully ensured.

The invention discloses a microwave treatment vehicle for asphalt concrete in installation groove areas of bridge expansion joints, comprising a vehicle body. A compacting device is arranged at the front end of the vehicle body. A generator set, a microwave power supply and a control system are installed in the vehicle body compartment. A motion mechanism is mounted on the rear end of the vehicle body and is provided with microwave heating walls. The microwave treatment vehicle disclosed by the invention has the characteristics of fast speed, high efficiency, safety, low labor intensity, no noise pollution and no environment pollution during construction processes. The microwave treatment vehicle can directly recycle the waste asphalt, and plays an important role in saving energy and reducing consumption.

The invention discloses a unilateral cantilever type water survey platform system, comprising a working boat, a unilateral cantilever survey platform, a boring tower and equipment. The working boat is provided with a plurality of windlasses, at least two shaped steels are arranged on the deck of the working boat, a plurality of supports are arranged on the shaped steels in a crossing way and extends out one side of the boat body, floor board and channel steel are laid on the supports, wherein the position of channel steel corresponds to the position of the shaped steel, the channel steel is in fixed connection with the support and the shaped steel, and the parts of the support and the floor board, extending out the boat body, are the working area cantilever sides. The boring tower is arranged on the unilateral cantilever survey platform. The equipment, comprising the boring tower inside the working area cantilever side and the slurry pumps on the boat body, is arranged on the survey platform. The invention is simple, has low cost, and can be used for geotechnical coring, sampling and in situ testing when exploring underwater, thereby ensuring exploration goes smoothly under any environments and conditions.

The invention discloses a building energy-conservation fire-protecting heat-preservation movable wall. The building energy-conservation fire-protecting heat-preservation movable wall comprises a main wall body, a locating boss and a locating groove, the two sides of the main wall body are provided with the locating boss and the locating groove respectively, the main wall body comprises a reinforcing board, a sound absorption filling layer, a first concrete adhesion layer, a fire-protecting heat-preservation layer, a second concrete adhesion layer and a decorative layer, the inside of the reinforcing board is filled with the sound absorption filling layer, one side of the reinforcing board is provided with multiple second dovetail grooves, the reinforcing board is connected to the second concrete adhesion layer through the second dovetail grooves, one side of the second concrete adhesion layer is connected to the fire-protecting heat-preservation layer in an adhesive mode, one side of the fire-protecting heat-preservation layer is connected to the first concrete adhesion layer in an adhesive mode, one side of the decorative layer is provided with multiple first dovetail grooves, and the decorative layer is connected to the first concrete adhesion layer through the first dovetail grooves. The building energy-conservation fire-protecting heat-preservation movable wall is reasonable and stable in structure, compared with a common movable board, the wall has good fire-protecting heat-preservation effects and a good sound insulation effect, the loss of indoor energy can be effectively reduced, and thus a user can have a quite rest environment.

The invention discloses a heavy load vertical impact test apparatus. The apparatus comprises a base; an impact mechanism is arranged at the middle position of the base; weight balancing units are symmetrically arranged at two sides of the impact mechanism; the weight balancing units are arranged on the base; and the weight balancing units are provided with clamping mechanisms. According to the heavy load vertical impact test apparatus of the invention, the supporting position of a test object is adjusted through the rotation of screw rods, so that test parameters can be changed; a sufficient impact force can be provided for a specific test object on a test bench; and the characteristics of the test object can be effectively tested. The heavy load vertical impact test apparatus is simple inoperation, reasonable and stable in structure and can perform testing and be used repeatedly.

The invention relates to an LED constant-current drive circuit controlled through LLC resonance. The drive circuit comprises a half-bridge driving chip, a full-wave rectification circuit, a half-waverectification circuit, a current sampling circuit and a PFC circuit. A first power thyristor and a second power thyristor are controlled by the half-bridge driving chip, the first power thyristor, thesecond power thyristor, a resonant inductor, a second transformer and a resonant capacitor form an LLC resonant loop, and the full-wave rectification circuit is externally connected with an LED load;the half-wave rectification circuit supplies power to the half-bridge driving chip after the LLC resonance loop is started, the current sampling circuit converts a current signal of the LLC resonanceloop into a voltage signal and feeds back the signal to the half-bridge driving chip, and the PFC circuit is formed by utilizing the LLC resonance signal of the LLC resonance loop and is responsiblefor correcting the power factor of the circuit. According to the circuit, the LLC resonant power thyristors are directly controlled by the half-bridge driving chip, so that a driving transformer of the power thyristors is saved, and the response speed is improved; meanwhile, the LLC resonant signal is utilized to form the PFC circuit, so that a special PFC circuit is saved, and the cost of the circuit is greatly reduced.

The invention relates to a vertical type tire dismounting device. The device comprises a stand column and a base; a pullet assembling assembly is arranged on the stand column; two dismounting tire pressure rolls which are capable of swinging horizontally are arranged on the pulley assembling assembly; a tire dismounting hook assembly is arranged on the pulley assembling assembly; the tire dismounting hook assembly comprises a tire dismounting hook bracket, a hook locking box, a tire dismounting hook locking device, a tire dismounting hook unlocking device and a tire dismounting hook; the hooklocking box is internally provided with a slide rail; a reversible round table is arranged on the base; and a rotating clamping disk and a plurality of slide rails which are distributed in the radialdirection are arranged on the round table. The device is capable of overcoming the disadvantage of large-scale vertical type tire dismounting machines in the prior art and effectively shortening the height of the stand column, is novel in design, reasonable and stable in structure, easy to operate, convenient, practical and durable, and is capable of dismounting tires more efficiently, improving the working efficiently and saving the working time.