43results about How to "Limit up and down movement" patented technology

The invention relates to a pretension and lay-off method of a crane jib for a ship, belonging to the technical field of a crane. The crane comprises a luffing mechanism composed of a top pulley block, a jib, a winch, a luffing wire rope and a jib head pulley block and a bracket. The method comprises the following steps: A. operating the winch in the forward direction, loosening the jib and layingoff the jib onto the bracket; and B, operating the winch in the reverse direction, pulling the jib upwards to enable the pressure of the jib on the bracket to be less than the pressure on the bracketbefore being subjected to the upward pull, and stopping and shutting off the winch. The invention also relates to a pretension and lay-off device of a crane jib for a ship. The luffing mechanism alsocomprises a middle pulley arranged at the middle of the jib, and the luffing wire rope is connected with the jib head pulley block and the middle pulley through the top pulley block. The pretension and lay-off method and device of a crane jib for a ship can produce a pretension force on the jib by means of the luffing wire rope, thereby reducing the self-weight load of the jib as well as the influence and the destruction on the jib structure as a result of the shock load and the changing load of the bracket on the jib. Besides, the invention has the advantages of simple method and structure, convenient operation and low cost.

The invention relates to the field of oil drilling and exploitation equipment, in particular to a protective noise reduction device used in a fracturing equipment operation site. The protective noisereduction device comprises protective noise reduction walls movably connected with a foundation, first corner modules fixedly connected with one edges of the protective noise reduction walls, second corner modules fixedly connected with the first corner modules, and corner tie rods fixedly connected with the first corner modules and the second corner modules correspondingly. According to the protective noise reduction device, the structure is simple, by adopting the protective noise reduction device, the protective noise reduction walls can be prevented from being damaged by spattered high-pressure disintegrating slag, the noise sound level of night operation can be lowered to be 55dB or below, impact resistance of the protective noise reduction walls is strengthened, modular design is achieved, thus disassembly and loading and transportation are convenient, displacement at all directions among protective noise reduction modules, the first corner modules and the second corner modules is limited, and the positions of the modules in the transportation process are relatively fixed to each other.

The invention discloses a fixing device for a special-shaped PCB. The fixing device comprises a frame which is mainly encircled by a first cross board, a second cross board, a first longitudinal board and a second longitudinal board; sliding grooves are formed in the inner side surfaces of the first cross board, the second cross board, the first longitudinal board and the second longitudinal board respectively; two parallel cross sliding strips and two parallel longitudinal sliding strips are arranged in the frame; one end of each cross sliding strip is embedded in the sliding groove of the first longitudinal board; the other end of the cross sliding strip is embedded in the sliding groove of the second longitudinal board; through grooves are formed in the cross sliding strips; one end of each longitudinal sliding strip is embedded in the sliding groove of the first cross board; the other end of the longitudinal sliding strip penetrates through the through grooves of the two cross sliding strips, and is embedded in the sliding groove of the second cross board; opposite grooves are formed in the opposite side surfaces of the two longitudinal sliding strips. According to the invention, the special-shaped PCB is restricted to move up and down through the grooves of the two longitudinal sliding strips, is restricted to move horizontally through the two cross sliding strips, and is fixed effectively.

The invention discloses a material clamping device of a track trolley. The material clamping device of the track trolley comprises a shell, a first sensor, a second sensor, a third sensor, a fourth sensor, a cylinder, a top plate, a first blocking sheet, a left clamping plate, a right clamping plate, a second blocking sheet, a travel switch and a cone. According to the material clamping device ofthe track trolley, effective safety protection measures are provided, and the movement of the FOUP can be limited from all directions after clamping; The mode that the left clamping plate and the right clamping plate move in the opposite directions is adopted, the top plate is located below the mushroom head and above the mushroom head; and moreover, the top plate makes close contact with the mushroom head all the time under the action of spring force, so that the problem of not tight clamping is solved; and the spring force is accurately calculated and tested, so that the FOUP cannot be damaged while it is guaranteed that the FOUP is reliably clamped. Therefore, the problem of over-tight clamping is avoided. The problems that clamping is too tight, clamping deviation is likely to happen,falling is likely to happen, and the position is wrong and cannot be recognized in the FOUP clamping and transferring process of an FOUP clamping device in the prior art are solved.

The invention relates to a high-efficiency and high-rate lithium battery structure, and is used for solving the problems that since a general lithium battery pole ear is used for conducting electric energy by welded pole columns, a welding process is difficult, the electrical conduction efficiency of a lithium battery is affected by welding spots and the discharging rate of the lithium battery is limited. The battery structure comprises a seal cover; electricity-taking pole ears are arranged below the seal cover, and the front end part of each electricity-taking pole ear passes through the seal cover and is located on the surface of the seal cover; each electricity-taking pole ear is wrapped with an insulating layer, and the front end part of each electricity-taking pole ear is exposed on the upper surface of the insulating layer located on the seal cover to form an external terminal. The battery structure has the advantages that the electricity-taking pole ears adopt integral design, the problem that a conventional lithium battery has process bottlenecks for welding the pole ears and the pole columns, the discharge rate of the lithium battery is increased, and the resistance and heat radiation conditions caused by the welding points during large current discharge are reduced. The electricity-taking pole ears are directly wrapped by the insulating layers of the pole ears, and the insulating layers of the pole ears have good sealing and insulation performance with the battery seal cover. The lithium battery structure has simple whole structure, reduces lithium battery manufacturing process, shortens the production time and reduces material costs.

The invention relates to the technical field of transportation, in particular to a lateral shoring device for goods in a container and a method for reinforcing the goods in the container. The method for reinforcing the goods in the container utilizes the lateral shoring device. The lateral shoring device comprises vertical supporting beams arranged on the inner sides of the goods and telescopic shoring pieces for shoring the vertical supporting beams. The telescopic shoring pieces press the vertical supporting surfaces of the vertical supporting beams against the goods in the shoring state, and the telescopic shoring pieces can release pressing of the vertical supporting beams against the goods in the released state. The lateral shoring device focuses on force application in a wide range in the height direction of the goods, the vertical supporting beams in the lateral shoring device are supported by a container floor, so that the goods in the container can be stably fixed to be prevented from toppling; and due to the fact that the vertical supporting beams are components used for applying force on the goods and the telescopic shoring pieces are telescopic, the lateral shoring device is suitable for goods with various heights and thicknesses and can be repeatedly used.

The invention relates to the technical field of wheel hub processing, and discloses an aluminum alloy wheel hub heat treatment device that can effectively improve the yield, including a heat treatment furnace body, and two mounting blocks are fixedly installed on the top of the heat treatment furnace body. The blocks are fixedly equipped with pulleys, and the opposite side of the pulleys is fixedly installed with a fixed cross bar above the heat treatment furnace body. The bottom of the hanging block is fixedly installed with an installation frame, the inner cavity of the installation frame is fixedly installed with a hanging rod, and the front surface of the hanging rod is fixedly installed with a wheel hub ring located in the inner cavity of the heat treatment furnace. The heat treatment device for aluminum alloy wheels that can effectively improve the yield can effectively ensure that the overall installation frame is more stable when sliding on the slider, and will not derail and other situations, causing the wheels to fall off and fall, affecting the overall yield of the aluminum alloy wheels. question.

The invention discloses a food dicing machine. The food dicing machine comprises a container, a gridding knife assembly and an upper cover, wherein the gridding knife assembly is installed at an opening of the container, and the upper cover is arranged above the opening of the container. The gridding knife assembly comprises a gridding knife plate and a rotating cutter placed on the gridding knife plate. The middle of the container is provided with a transmission shaft. The transmission shaft upwards and freely penetrates through a center hole of the gridding knife plate to be detachably connected with the rotating cutter. The upper end of the transmission shaft is provided with a transmission head connected with the rotating cutter. The connecting position of the transmission head and the rotating cutter is provided with a buckling structure easy to disassemble and assemble. The buckling structure is further provided with a limiting device in the vertical direction. When the rotating cutter is placed on the transmission head and rotates, a driving buckling part arranged on the rotating cutter and a driven buckling part arranged on the transmission head are buckled with each other, so that the transmission shaft is driven to rotate, and the rotating cutter does not shift up and down during rotating through the limiting device of the buckling structure. According to the food dicing machine, the structure is simple, in addition, the rotating cutter can be restricted from being shifted up and down, installing and operating are convenient and easy, and cleaning is convenient.

The invention provides a bottle base conveying device. The device comprises a cooling water channel and a chain bracket which are arranged on a heater, wherein the chain bracket is provided with a transmission chain; the transmission chain is provided with a friction wheel; the friction wheel is inserted between plastic bottle bases in operation, and tightly pulls a screw socket of the plastic bottle base on the wall surface of the cooling water channel; the cooling water channel is provided with a groove to be inserted by a convex ring of the screw socket of the plastic bottle base; the height of the groove is matched with that of the convex ring; the friction wheel is connected with a self-transmission drive mechanism. The bottle base conveying device has the advantages of good conveying stability, good durability and good heat dissipation effect.

The invention discloses a Chinese bee hive. The Chinese bee hive comprises a hive body, hive walls, hive frames, upper beams, frame lugs, side strips, lower beams, frame lines, partition plates, partition plate lugs, auxiliary covers, hive covers, hive doors and frame supports. The adjacent upper beams of the hive frames in the hive body tightly lean against each other so as to avoid forming inter-frame bee ways, a honeycomb structure similar to a natural honeycomb with closed hive tops is achieved, and gaps are formed between the frame lugs. According to the Chinese bee hive, the hive framesis convenient to arrange and extract when a honeycomb is checked, ventilation in the honeycomb is facilitated, unsmooth ventilation caused by closing of the tops in the bee hive due to the fact that the upper beams are tightly close to each other is avoided, bees staying on the upper beams of the hive frames can return to the honeycomb through the gaps formed between the frame lugs during box opening checking, and losses of the bees are avoided.

The invention discloses a double-layer spiral vibrating screen and relates to the technical field of vibrating screens. The double-layer spiral vibrating screen comprises a base, a vibrating cabin anda spiral vibrating device, wherein the base comprises a circular disc and a circular ring; the circular ring is fixed on one surface of the circular disc; a plurality of stepped holes are formed in one surface of the circular ring and are matched with stepped columns of the vibrating cabin; a plurality of stepped columns are arranged on one surface of the vibrating cabin; the circumferential sidefaces of the stepped columns are matched with springs; the internal surface of the vibrating cabin is matched with the spiral vibrating device; the spiral vibrating device comprises a spiral vibrating screen, a spiral vibrating plate and a central shaft; the spiral vibrating screen and the spiral vibrating plate are arranged on the circumferential side face of the central shaft; the spiral vibrating plate is positioned below the spiral vibrating screen; a vibration motor device is fixed at one end of the central shaft of the spiral vibrating device; and the other end of the central shaft is matched with a dustproof cover. According to the invention, through action of the double-layer spiral vibrating screen, the vibration motor and the vibrating cabin, the problems that material in screenmeshes of the vibrating screen is jammed and excessive materials of the vibrating screen are piled up are solved.

The invention provides a refrigerator inner container and a refrigerator. The refrigerator inner container comprises an evaporator and a refrigerator inner container body; the evaporator comprises evaporating pipes; the inner wall of the refrigerator inner container body is provided with bosses which are located below the evaporating pipes and make contact with the outer walls of the evaporating pipes, wherein the bosses are used for supporting the evaporating pipes to enable the evaporator to be assembled on the refrigerator inner container body. According to the technical scheme, the bosses are arranged on the inner wall of the refrigerator inner container body, when the evaporator is installed on the refrigerator inner container body, the bosses can be clamped in the middles of the evaporating pipes of the evaporator to limit the evaporating pipes to move up and down, a role of supporting the evaporating pipes is played, therefore, the stability of the evaporator in the transportation process can be improved, the problems that the evaporating pipes at the bottom of the evaporator is too close to or makes contact with the bottom of the refrigerator inner container body due to the fact that the evaporator falls caused by road bumping can be avoided, then the problem that the refrigerator inner container body is deformed due to the too high temperature can be avoided, and the using safety of the refrigerator can be effectively improved.

Proposed is a dispensing system (4) for an agricultural spreader machine (1) for discharging granular or granulated material, wherein an upright rotary feeder arrangement (7) is provided, which in combination with an adjustable rotary feeder base (13, 14) allows the dispensing quantity to be varied within a broad range with a reduced drive energy requirement.

A cable protection and guide device in which wear damage in mounting portions of a mounting bracket is avoided and the mounting bracket is reliably and strongly mounted so that the cable is smoothly protected and guided. The mounting operation of the bracket is easy. A cable protection and guide device includes a mounting bracket having a mounting hole which surrounds and accommodates a tap bolt. A threaded portion 162 of the tap bolt includes a metallic bush 170 and the length H 1 of the metallic bush 170 in a bolt inserting direction is shorter than the length H 2 of the mounting hole 143 in a bolt inserting direction.

The invention discloses a power connection device of a power connection terminal of a power supply system, and relates to the technical field of power supply machinery. The power connection device comprises a device body, a power connection end is fixedly connected to the side face of the device body, and a stabilizing mechanism is fixedly connected to the top of the inner side face of the device body. A connecting mechanism is fixedly connected to the position, close to the power connection end, of the surface of the stabilizing mechanism, a regulation and control mechanism is installed on the front face of the device body, a dew reducing mechanism is fixedly connected to the inner side face of the regulation and control mechanism, the regulation and control mechanism comprises a shell and a stepped groove, and the stepped groove is formed in the front face of the device body. According to the power connection device, through the cooperative use of the stabilizing mechanism, the connecting mechanism, the regulating and controlling mechanism, the dew reducing mechanism and other mechanisms, the problems of instant power failure caused by easy dislocation of the relative position between the power connection end and the power connection equipment, how to automatically and effectively limit a wire interface, and how to effectively reduce surface corrosion of electrical apparatus elements in the power connection device are solved.

The invention discloses an in-vitro orthopedic device and a preparation method thereof. The in-vitro orthopedic device comprises an orthopedic main body, a front orthopedic surface and a rear orthopedic surface, wherein the orthopedic main body is in a hollow cylinder shape, openings are formed in the front surface, the rear surface, the left surface and the right surface of the orthopedic main body, and the front orthopedic surface and the rear orthopedic surface are arranged in the front opening and the rear opening of the orthopedic main body respectively. A front blocky structure bottom surface and front outer side unit blocks form a front blocky structure area. The front outer side unit blocks are hexagonal unit blocks which are distributed from top to bottom, from small to large in size and from large to small in gaps, and when the knee joint of a user stretches backwards and is in a bent state, the gaps between part of the front outer side unit blocks can be shrunk to start to generate contact extrusion, and tiny deformation resistance can be generated. According to the blocky structure, gradual change of rigidity is achieved by adjusting the gaps between the front outer side unit blocks.

A scanner powered by the limited power available on a peripheral bus. In particular, the scanner can operate within the 2.2 watts provided over a USB connector. The scanner of the present invention uses a contact image sensor (CIS) which uses optics to distribute light from each light emitter to multiple pixel positions, preferably using a single LED for each color. An electric motor for driving the platen uses rare earth magnets to limit the power required. Instead of the traditional method of biasing the CIS scanner against the platen with a spring, the platen itself is spring-biased. The moveable spring biasing of a platen is possible because a worm drive motor is used allowing a helical thread on the worm drive to contact the platen gears as they move up and down as biased. Preferably, the helical thread of the worm gear has a single point of contact with a gear on the platen, further limiting the friction and allowing the platen to move up and down with respect to the stationary motor.

The invention discloses an electrical automation instrument protection device which comprises a supporting plate, a box body is fixedly arranged on the supporting plate, damping devices are symmetrically and fixedly arranged on the upper inner wall and the lower inner wall of the box body, each damping device comprises a first fixing plate, a first spring and a second fixing plate, and the first fixing plates are installed on the upper inner wall and the lower inner wall of the box body. The two first springs are fixedly arranged on the side, away from the inner wall of the box body, of the first fixing plate, the second fixing plates are fixedly arranged at the ends of the sides, away from the first fixing plate, of the first springs, and first semi-annular plates are fixedly arranged atthe two ends of the first fixing plate. The device has the advantages that the vibration amplitude of the annular protective frame is reduced, the vibration amplitude of a flow meter is reduced, the reading accuracy of the meter is improved, the service life of the meter is prolonged, and the effects of damping and protecting the flow meter are achieved.