405results about How to "Easy loading and unloading" patented technology

The invention discloses a rock-soil body temperature-control dynamic characteristic test system and method, is characterized in that the system includes a dynamic triaxial pressure chamber and a temperature control device; the dynamic triaxial pressure chamber comprises a pressure chamber cylinder body, a piston rod and an upper dowel bar; a sample is arranged between the lower end of the upper dowel bar and the upper end of the piston rod; the dynamic triaxial pressure chamber also includes a pressure sensor, an axial displacement sensor, a deformation sensor, a confining pressure sensor, a lateral displacement sensor and a pore pressure sensor; the temperature control device includes a temperature sensor, a temperature controller and an arc plate type heater symmetrically coating the outer wall of the pressure chamber cylinder body. The temperature-control dynamic characteristic test method mainly includes installing the sample, setting the temperature control device, carrying out drainage consolidation of the sample, applying dynamic/static stress, and completing a temperature-control dynamic/static triaxial test, to determine the cumulative plastic strain, dynamic damping ratio, dynamic elastic modulus and other indexes of a rock-soil body under different temperatures. The system and the method have the advantages of uniform heating temperature, short heating time and low cost, and can accurately control the temperature in the pressure chamber.

The invention relates to a six-axis five-linkage spiral bevel gear cutting machine. A lathe bed is provided with a fixed upright post and an X-direction linear guiderail with an X-axis slipway which is driven by a driving mechanism to move along the guiderail; the X-axis slipway is provided with a rotary table and a rotary table driving mechanism; the rotary table is provided with a workpiece box with a workpiece main shaft which is driven by the driving mechanism to rotate; one lateral surface of the upright post is provided with a Y-direction linear guiderail perpendicular to the X-direction linear guiderail; the Y-direction linear guiderail is provided with a Y-axis slipway which is driven by the driving mechanism to move along the guiderail; the Y-axis slipway is provided with a Z-direction linear guiderail perpendicular to the Y-direction linear guiderail; the Z-direction linear guiderail is provided with a tool box which is driven by the driving mechanism to move along the guiderail; and the tool box is provided with a rotatable tool spindle. The six-axis five-linkage spiral bevel gear cutting machine has the advantages of simple and stable structure, good reliability, good rigidity, few parts, small occupied area, easy protection and chip removal, and convenient assembly and disassembly of workpieces and tools.

The invention discloses novel high-accuracy jewelry processing equipment, which has a simple structure and high production efficiency and machining accuracy, is convenient to operate and use, and particularly can be used for automatically identifying and trimming a grinding disc so as to reduce the rejection rate and save the cost. The novel high-accuracy jewelry processing equipment solves the technical problems that in the prior art, the machining accuracy of jewelries is low, the operation and use waste time and energy, the automatic identification and trimming cannot be performed according to plate surface changes of the grinding disc, the machining accuracy and the production efficiency of components are reduced, the rejection rate is increased, the cost is raised, and the like. The novel high-accuracy jewelry processing equipment comprises a processing platform, and the grinding disc and a grinding head device arranged on the processing platform, wherein the grinding disc is connected with a power unit; the processing platform is also provided with a grinding disc trimming mechanism capable of shifting horizontally along the surface of the processing platform; the grinding head device is provided with a surface-rotating mechanism with a surface-rotating locking mechanism, and a rotation angle mechanism with a rotation angle locking mechanism; and the grinding disc trimming mechanism is provided with a detection control mechanism.

The application discloses a handcart. The handcart comprises scissor fork mechanisms which are arranged on the base, a slope plate and a lifting driving device; a lifting plate is arranged at the tops of the scissor fork mechanisms; the slope plate is connected with the lifting plate in a sliding manner; when the height from the lifting plate to the ground surface is less than a preset value, one end, which slides out of the lifting plate, of the slope plate is in contact with the ground surface, and the other end of the slope plate is connected with the edge of the lifting plate; the lifting driving device is used for enabling scissor fork mechanisms to stretch and fold; the lifting driving device is fixedly connected with a base. According to the handcart, the lifting plate is lifted through the scissor fork mechanisms and the lifting driving device; when the handcart is required to be loaded or unloaded, the lifting plate is descended; when the height from the lifting plate to the ground surface is less than the preset value, one end, which slides out of the lifting plate, of the slope plate is in contact with the ground surface, and the other end of the slope plate is connected with the edge of the lifting plate to form a slope, so that cargoes are conveniently pushed up to or pushed down from the lifting plate through the slope; the cargoes are convenient to load and unload. The cargoes can be ascended to a specific position through the scissor fork mechanisms and the lifting driving device, so that the requirement of the cargoes on the height of a table top is met.

The present invention discloses a connection structure for socket and charging connector of a mobile communication terminal pertaining to the connection structure. The connection structure is composed of a socket, consisting of a conductive material, installed in the electrical machinery, and which can transmit the data while be connected to a power supply for charging at the same time; and a charging connector, having a conductive material terminal portion connected to the socket and a insulation material body protion supporting the terminal portion. It is charactered in that: both sides of any one of the socket and the terminal portion are mounted with magnets, and both sides of the other one are mounted with magnetic materials at the corresponding place to the magnets, so that the generated magnetic force can link the socket and the charging connector. Thereby, it allows the connection and separation of the charging connector and the socket to be easier, and would effectively prevent the breakage of the charging connector and the socket.

The invention relates to a debris flow simulation test device and method capable of adjusting and controlling hazard-cause factors. A slurry storage box is arranged on a base platform and communicated with a debris flow forming area slurry tank through a slurry delivery pipe, the slurry delivery pipe is provided with a slurry pump and a slurry output valve, the debris flow forming area slurry tank is communicated with a debris flow circulating area slurry tank through a movable rubber belt, the debris flow forming area slurry tank and the debris flow circulating area slurry tank are both obliquely arranged, the included angle between the debris flow forming area slurry tank and the debris flow circulating area slurry tank and the horizontal plane is smaller than 90 degrees, and an opening formed in the bottom end of the debris flow circulating area slurry tank faces a horizontally-arranged data acquisition board. The device and method have the advantages of being easy to operate, convenient to assemble and disassemble, clear in result comparison and the like and are suitable for range prediction research of different types of debris flow hazard areas in mountain areas of China.

The invention discloses an assembly type molten salt reactor. A reactor core of the assembly type molten salt reactor comprises a central reflecting layer, an active zone and an external reflecting layer which are coaxially arranged from interior to exterior; the active zone and the external reflecting layer are in regular hexagonal prism shape, the active zone encloses the external part of the central reflecting layer, and the external reflecting layer encloses the external part of the active zone; the active zone is composed of several regular hexagonal prism structural units, the regular hexagonal prism structural units are parallelly arranged at a radial direction in order to form a honeycomb structure, the regular hexagonal prism structural units are coaxially stacked at an axial direction in order to form a layered structure, and each regular hexagonal prism structural unit is assembled by six regular triangular prisms. The assembly type molten salt reactor has a clear position, and is good for control of power distribution; at the same time, materials can be conveniently loaded and unloaded, and a refuelling mode is simplified by means of displacement of radial and axial positions of assemblies, higher burnup of fuel is reached, and effective cycle and management of the fuel are realized.

The invention discloses a full-automatic double-work-station circumference welding machine, comprising a power source, a framework, a welding gun arm, a control box and two trays. Cylinder compaction units are disposed above the two trays respectively, and a continuous speed regulation electric motor and a worm-gear speed reducer are mounted under the trays respectively. A double-work-station welding set is used to enhance working efficiency greatly. The invention is provided with a reasonable design, the speed of welding can be adjusted by the continuous speed regulation electric motor, and the welding quality can be adjusted at the same time. The auto control system is designed according to electronic cam principle and is provided with good stability, for controlling each acting member by an electronic sensor to form a circulating device, thereby automatic circulation effect is realized.

The invention relates to an end effector of a dry land potted tray seedling transplanter, which is characterized by comprising a stander (1) connected with a mechanical arm of the transplanter, wherein a motor (24) is arranged in the stander (1), an output shaft of the motor (24) is connected with a cylindrical cam (10), a driven link roller (12) of the cylindrical cam (10) is arranged on a pointer fixed ring (13), at least three pointers (14) are fixed on the pointer fixed ring (13), the lower end of the stander (1) is connected with pointer guiding pipes (19), each pointer (14) is arranged in each pointer guiding pipe (19) respectively, the length of the pointer (14) is longer than that of the pointer guiding pipe (19), and the lower end of the pointer guiding pipe (19) bends inwards. The end effector has a simple and compact integral structure, is convenient to mount and demount, has good independence, not only can be used in parallel to improve the working efficiency of picking seedlings but also can be controlled singly to increase the flexibility of picking the seedlings, and has light volume and low cost.

Disclosed is a load carrier made up of a flat tray like body which attaches to a vehicle by load bars. A cargo container attaches to the flat tray-like load carrier body, and is locked in one of several possible positions on the flat tray-like body. The load container may also be removed and the load carrier used without the cargo container. Devices for holding objects such as bicycles, canoes, kayaks, may also be attached to the load carrier.

The invention discloses an automatic bearing press-mounting machine for a water pump rotor, and relates to an assembling machine. The automatic bearing press-mounting machine is technologically characterized in that the automatic bearing press-mounting machine comprises a workbench, a first fixing base, a second fixing base, a sliding base slidably arranged on the workbench, and a mounting base; the mounting base is used for horizontally mounting the rotor and located between the sliding base and the first fixing base, both the sliding base and the mounting base slide towards the first fixingbase, and an elastic piece used for driving the mounting base and the first fixing base to move away from each other is arranged between the mounting base and the first fixing base; bearing cavities right facing the mounting base are formed in the first fixing base and the sliding base, and bearings are arranged in the bearing cavities; and the automatic bearing press-mounting machine further comprises conveying mechanisms used for conveying bearings to the corresponding bearing cavities separately and a driving mechanism used for driving the sliding base to slide. The automatic bearing press-mounting machine for the water pump rotor is high in automation degree and capable of achieving feeding and discharging conveniently, the production efficiency is improved, and the rotor is not proneto damage caused by collision with hard objects; and feeding pieces and guide blocks are arranged so that automatic feeding of bearings can be completed, and the bearing is not prone to being knocked.

The invention provides a method and device for supporting a side-roll torsion bar system of a railway vehicle. A multi-layer composite sleeve support method is used for supporting an anti-rolling torsion bar system of the railway vehicle. The multi-layer composite sleeve support method is as follows: a layer of steel bushing the hardness of which is lower than that of a torsion bar shaft material is sleeved on the torsion bar shaft by means of interference fit; the steel bushing is used for bearing torsional friction generated in the use process; the steel bushing is made of a material the hardness of which is relatively low, so that the torsion bar shaft can be effectively protected (because the hardness of the torsion bar shaft is high and the torsion bar shaft is sensitive to surface defects, the torsion bar shaft is easy to rapidly expand to be damaged if the torsion bar shaft is scratched in the use process); and a layer of friction resisting sleeve is sleeved outside the steel bushing, the outer diameter of the friction resisting sleeve and a support seat are in an interference fit structure, and the inner diameter of the friction resisting sleeve and the torsion rod shaft are in interference fit, thus ensuing that radial bearing can be provided and the torsional function of the torsion bar shaft can be successfully realized in the use process.

The invention discloses a force limiting adapter coupling wrench for assembling and disassembling a bolt in an aircraft engine rotor component deep cavity, and aims to realize assembly and disassembly operation in an aircraft engine gourd-shaped deep cavity and solve the problem of difficulty in assembly and disassembly of the bolt between integral turbine wheels of an engine. According to the adopted technical scheme, the wrench comprises a supporting plate and a wrench body, wherein the supporting plate can be supported against a gourd-shaped opening of an aircraft engine rotor blade disk and is provided with a cambered hole; the wrench body passes through the cambered hole, can move along the cambered hole and comprises a first adapter, a steel pipe and a gear seat which are integrated; the steel pipe is curved; the end face of the first adapter is guaranteed to be perpendicular to the end face of the gear seat; the first adapter is connected with a second adapter; the second adapter is connected with a force limiting wrench capable of screwing the entire device; the gear seat is provided with a ratchet wheel mechanism; the ratchet wheel mechanism comprises a ratchet wheel and a pawl matched with the ratchet wheel; the ratchet wheel is provided with a counterbore; the size of the counterbore is the same as the size of a nut matched with the bolt of the blade disk.

A pickup truck with a cab-over-engine and a platform for goods and passenger transport is provided wherein the platform comprises at least one longitudinal drop-level lower loading plate, and adjacent to each lower loading plate, at least an upper loading plate, raised relative to the lower loading plate and parallel thereto, and wherein for each lower loading plate, a longitudinal flap is articulated on an upper loading plate adjacent to the lower loading plate and having a length not less than that of the lower loading plate, the flap being adapted to tilt between a folded position on the upper loading plate wherein it clears a volume located above the lower loading plate, and an unfolded position above the lower loading plate wherein it forms a plate with each upper loading plate adjacent thereto.

The invention discloses a clamp for a coupling packaging device of a coaxial laser device, and the clamp is suitable for a TOSA/ROSA (Transmitter Optical Subassembly/ Receiver Optical Subassembly) laser welding coupling packaging system. According to the invention, a conical surface is utilized for positioning, thereby being easy for automatic centring, ensuring the vertical degree of a clamped component and promoting the aligning precision in the process of coupling and welding a laser device. An external threaded rod can be rotated for clamping the component. A wiring terminal which is arranged at the bottom of the device can be used for automatically electrifying the clamped component, wherein the wiring terminal has adjustable height and can be easily switched on. The clamp for the coupling packaging of the coaxial laser device has the characteristics that the structure is compact, the positioning and aligning precision is high, the component is easily disassembled, the operation is convenient and simple, and the clamp petals of different sizes can be changed for clamping different TO (Transmitter Optical) products of different external sizes.

This invention relates to one advertisement pad for convenient dissemble operation, which is fixed on the wall, wherein the advertisement is fixed onto support socket through supportive board by bolt, spring pad ring, plat ring and screw bolt; slide wheel is fixed onto proper position by slice wheel and butterfly screw; the ropes are handed from upper supportive board and down one hook with two ends coil the slide wheel relative to supportive board; the supportive socked end is one inclination at an angle of 45 degrees and upper edge of supportive board is at 45 degrees of inclination.

The invention relates to an SIM card fixing device and a mobile terminal, and the device is disposed in the terminal. The device comprises a card holder for bearing an SIM card, a card seat for bearing the card holder, and a holder locking mechanism which is used for fixing the card holder. The card seat is provided with a first elastic part, and the first elastic part is used for applying an outward pushing force to the card holder when the SIM card withdraws. The holder locking mechanism comprises a press part, a locking rod, and a second elastic part. The locking rod is provided with a locking buckle, and the card holder is provided with a locking piece. When the card holder is assembled in the terminal, the locking buckle and the locking piece cooperatively abut against each other, thereby preventing the card holder from withdrawing. The press part is provided with a first force applying surface making contact with the locking rod, and the first force applying surface is used for pushing the locking rod to move when the press part is pressed, thereby driving the locking buckle on the locking rod to move and achieving the withdrawing of the card holder. The second elastic part is connected with the locking rod, and is used for achieving the resetting of the locking rod when the card holder withdraws. According to the embodiment of the invention, the device achieves the convenient assembly and disassembly of the SIM card.

The invention discloses a welding machine for a wheel casing. According to the technical scheme, the welding machine for the wheel casing is characterized in that the welding machine for the wheel casing comprises a discharging mechanism and a welding head mechanism; the discharging mechanism comprises a fixed base plate and a base with one end rotationally connected to the fixed base plate; the other end of the fixed base plate and the other end of the base are provided with first driving pieces driving the base to rotate relative to the fixed base plate. The welding machine for the wheel casing solves the problems that an existing welding machine for the wheel casing is not convenient in the aspects of feeding and discharging and prone to damage.

The invention discloses a rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology and temperature control extrusion die. The rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology comprises the technological steps of casting ingot homogenizing treatment, primary extrusion machining, lubricating treatment, temperature control extrusion forming and pipe heat treatment. The rare earth enhanced magnesium-zinc alloy seamless pipe temperature control extrusion die comprises an upper die base, a lower die base, an inner extrusion barrel, an outer extrusion barrel, a heat insulation layer and an outer covering die. A heating wire is arranged inside the outer extrusion barrel, a pipe shaping die and an extrusion rod are installed in the inner extrusion barrel, an extrusion needle is fixedly installed at the lower end of the extrusion rod, the inner extrusion barrel, the outer extrusion barrel, the heat insulation layer and the outer covering dieare provided with a through temperature measuring hole, and a thermocouple is installed in the temperature measuring hole. Compared with the prior art, the rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology and temperature control extrusion die have the advantages that extrusion deformation force is small, assembling and disassembling are more convenient and faster, the pipe blank dimension is more precise, product machining quality is good, and the good rate is high.

The invention discloses a chip inductor ultrasonic cleaner which comprises a cleaning box. An ultrasonic generator is fixedly installed on the lower surface of the interior of the cleaning box, a supporting rod is fixedly connected to the front side of the upper surface of the cleaning box, a rotating groove is formed in the upper end of the outer surface of the supporting rod, a rotating plate isrotationally connected to the interior of the rotating groove through a rotating base, guide grooves are formed in the two ends of the upper surface of the rotating plate, guide rods are in sliding connection to the interiors of the guide grooves, a limiting plate is fixedly connected to the upper surfaces of the guide rods, a connecting plate is fixedly connected to the lower surface of the guide rods, supporting plates are fixedly connected to the two sides of the lower surface of the connecting plate, cleaning baskets are rotationally connected to the interiors of the supporting plates through rotating shafts, and a pulling rod is fixedly connected to the surface of the back end of each rotating shaft. By means of the chip inductor ultrasonic cleaner, the cleaning efficiency can be greatly improved, the labor intensity is reduced, and the cleaning cleanliness is guaranteed.

The invention relates to the field of floor products, in particular to a novel floor. The novel floor comprises a main body floor, wherein the main body floor is rectangular and consists of a first long side, a second long side, a first short side, a second short side, an upper layer base material, a middle layer base material and a bottom layer base material, wherein the first long side of the upper layer base material extends outwards; a flat long side rabbet is arranged at the position where the first long side extends outwards; the second long side of the bottom layer base material extends outwards; long side grooves are arranged at the positions where the second long side extends outwards, and the side wall of the middle layer base material; the first short side of the upper layer base material extends outwards; a short side rabbet is arranged at the position where the first short side of the upper layer base material extends outwards; the second short side of the bottom layer base material extends outwards; and a short side groove is arranged at the position where the second short side extends outwards. The novel floor of the invention is convenient in mounting and dismounting by the construction of the floor structure; and the floor can be directly installed without any tool so that the mounting efficiency is improved.

The invention relates to a wall mounting type air conditioner capable of automatically removing dust, which comprises a monolithic frame (1), a lower filter screen (2) and an upper filter screen (3), where the lower filter screen (2) and the upper filter screen (3) which are installed on the monolithic frame (1) are equipped with a dust removing brush moving along the filter screens and an automatic dust removing device which simultaneously rotates. As the invention employs a structure that the lower filter screen (2) and the upper filter screen (3) are equipped with the dust removing brush moving along the filter screens and the automatic dust removing device which simultaneously rotates, when the air-conditioner is in the mode of automatically removing dust by the filter screens, a cylindrical rotating brush installed in a brush box parallel moves on the filter screens, simultaneously the brush constantly contacts with the filter screens in the process of rotation, the dust on the filter screen is removed due to friction effect, then the dust is collected into the brush box, at last, after the brush box moves to the initial position, a ventilation functional module is initiated, and the dust in the brush box is pumped away. In addition, wall mounting type air conditioner employs the installation mode of integral embedded type, which is convenient for dismounting.

The invention provides an ultra-low permeability measurer adopting a sine pressure wave oscillation method. The ultra-low permeability measurer comprises a triaxial pressure rock core clamp (2), a rock core (3), a sine pressure wave generator (4), a vacuum pump system (5), a basic pressure boosting pump (6), an annular pressure/axial pressure boosting pump (7), a microcomputer (8) and a fixed-value container (9). The ultra-low permeability measurer adopting the sine pressure wave oscillation method has the technical effects of high test precision, stable performance, high repeating precision, high test speed and convenience and simplicity for operation, and the difficulty in measuring the ultra-low permeability of the rock core is solved.

The invention discloses a transfer device for a foam powdery material. The transfer device for the foam powdery material comprises a transport cart, wherein the lower part of the transport cart is provided with universal wheels; the two ends of the transport cart are both provided with pushing handles; a left side wall and a right side wall in the transport cart are provided with sliding rails; a baffle plate is arranged in the transport cart; the baffle plate is mounted on the sliding rails; the bottom of the transport cart is provided with air cylinders; push rods of the air cylinders are connected to the middle of the baffle plate. A packing bag is prevented through the arranged baffle plate which can be lifted, so as to carry out stable loading and transportation.

The invention discloses a logistics transfer loading and unloading device which comprises a cart. A goods hopper is arranged above the cart, a lifting table is connected below the goods hopper, two sets of connecting rods arranged in parallel are hinged to a front wall and a rear wall of the lifting table, and lower ends of the connecting rods are hinged to a bottom plate of the cart. A piston rodof a hydraulic cylinder is hinged to a tail end of the lifting head, and the hydraulic cylinder is hinged to a bottom plate of the cart through a hinge base. The lifting platform, the connecting rodsand the hydraulic cylinder are arranged so that the goods hopper is lifted and extends outwards, and the goods hopper can conveniently adapt to a goods container height of other carrying tools; by arranging a moving block, a horizontal lead screw and a lifting plate, forward moving of a goods container is achieved, the goods hopper is in lap joint in the goods box, loading and unloading by personnel are facilitated, and loading and unloading stability is improved; and by arranging a fixing frame, a lifting frame and a vertical lead screw, the height of the goods hopper is conveniently adjusted, goods loading and unloading on the ground are facilitated, and the loading and unloading efficiency is improved.

The invention discloses an aluminium alloy mosquito net bracket which comprises a ceiling frame and a plurality of vertical supporting rods for supporting the whole ceiling frame; the ceiling frame is formed by the enclosing of a plurality of ceiling struts, the ceiling struts and the vertical supporting rods comprise a plurality of sections of connecting rods, and the connecting rods are connected with threaded pipes; the ceiling struts are connected by a three-way pipe, and the rest ends of the three-way pipe are connected with the vertical supporting rods. As the ceiling struts and the vertical supporting rods are formed by a plurality of sections of connecting rods connected by threaded pipes, and then the ceiling struts and the vertical supporting rods are connected by the three-way pipes, the mosquito net bracket can be detached into a plurality of sections of connecting rods in transportation, thus being convenient to transport; the connecting manner of the threaded pipes and the three-way pipes is adopted, therefore, the mosquito net bracket is simple and convenient to assemble and disassemble and strong in flexibility, and simultaneously the improvement on the stability of the mosquito net bracket is benefited. The aluminium alloy mosquito net bracket also has the advantages of being uneasy to get rusty, long in retention time and the like.

The invention discloses a multifunctional vacuum preloading consolidation experiment apparatus which employs a small-scale test model for simulating vacuum preloading and heaped loading tests. The apparatus comprises a vacuum preloading consolidation chamber, a top plate, a pedestal, an axial-direction clamping member, a plastic-drainage-belt fixing frame, vacuumizing equipment, supercharging and pressure-stabilizing equipment, a vertical drainage system, a drained-water collection and drained-water volume measure system, a thick-layer preloading membrane, a settlement displacement measure system and an air pressure measure system. The apparatus is capable of simulating closed type vacuum preloading test, supercharged type vacuum preloading test, positive-negative pressure circulating type vacuum preloading test, heaped preloading test and other tests established under the cases of controllable deformation of the drainage belt, completely satisfies indoor experiment demands under different conditions, practices design ideas of low cost and multiple functions in a real sense, and possesses multiple advantages such as simple structure, operation convenience, strong visibility, applicability to multiple vacuum preloading test research, and the like. The invention also provides multiple methods for performing closed type vacuum preloading experiments by employing the multifunctional vacuum preloading consolidation experiment apparatus.

The invention relates to a winding and unwinding device for a printing machine. The winding and unwinding device for the printing machine is characterized in that the winding and unwinding device comprises a transmission shaft (1), an air pressure mechanical chuck (2) used for the winding and unwinding of the printing machine is arranged at one end of the transmission shaft (1), a screw nut base (3) used for driving the transmission shaft (1) to move in the axial direction is arranged at the other end of the transmission shaft (1), a ball screw (4) used for driving the screw nut base (3) to move is connected to the screw nut base(3), a screw rod synchronous wheel(5) used for driving the ball screw(4) to rotate is arranged at one end of the ball screw (4), a synchronous belt (6) is arrangedon the screw rod synchronous wheel (5), a motor synchronous wheel (7) is arranged on the synchronous belt (6), a speed reducing motor (8) is arranged on the motor synchronous wheel (7), and a rotating device (9) is arranged on the transmission shaft (1). The winding and unwinding device for the printing machine has the advantages of being easy in unloading and automatic in centering, shortening downtime, reducing labor intensity of employees, and improving the production efficiency, safety and reliability.

The invention relates to a micro-motion stepless speed regulation grinding device for a common big vertical lathe, which comprises a two-dimensional regulation mechanism, a hand feeding mechanism, a lifting mechanism of a grinding head and a grinding head of an electric main shaft. The two-dimensional regulation mechanism connects a support body, a first connector, a second connector and a mounting plate of a guide rail sequentially by two pairs of swivel bearing pairs and one pair of dovetail pairs and realizes the two-dimensional regulation of the entire device; the hand feeding mechanism realizes microfeed by the transmission of the two pairs of gear pairs; the lifting mechanism of the grinding head drives one pair of gear pairs by a motor, and then the gear pairs push a lead screw thread pair with a linear guide rail, thereby realizing the up-and-down lifting of the mounting plate of the electric main shaft; and the grinding head of the electric main shaft is formed by sequentially connecting an electric main shaft seat, the electric main shaft, an Morse taper shank and a grinding wheel. The invention realizes that a grinding function is realized on the common big vertical lathe, the grinding range is 0 to 10000rpm, and the minimum feed amount of the hand feeding mechanism is 0.0005mm.

The invention relates to a magnetorheological fluid damping type human body muscle strength rehabilitation instrument. A magnet exciting coil is placed in a magnetic conductivity cylinder through a locating ring, left and right end covers are fixedly connected with two ends of the magnetic conductivity cylinder respectively, polytetrafluoroethylene seal rings are placed between the left and right end covers and the magnetic conductivity cylinder respectively, left and right shear plates are respectively placed in the middle of the locating ring, the left and right shear plates are connected with the left and right end covers in a matching and sealing mode through left and right cylindrical bars respectively, the left and right cylindrical bars are located on the left and right shear plates and penetrate through the left and right end covers respectively, left and right right-angle plates are fixedly connected with the left and right cylindrical bars respectively, and a magnetorheological fluid is filled in the magnetic conductivity cylinder. According to the magnetorheological fluid damping type human body muscle strength rehabilitation instrument, under the magnetic field action, the shearing resistance required by a rehabilitation training continuity can be continuously adjusted through the adjustment of electric current according to recovery conditions of muscle tension of a patient, and a secondary injury caused by the fact that the patient overestimates or underestimates the muscle tension during the training and treating process can be avoided. The magnetorheological fluid damping type human body muscle strength rehabilitation instrument has the advantages that the cost is low, the adjustable range is wide, the operation, assembly and disassembly are convenient, the humanization and intelligentization can be further achieved, and the like.