104results about How to "Increase manufacturing cost" patented technology

The invention provides a hoisting type charging device and an automatic folding and unfolding method. The charging device comprises a charging gun; the charging pile is suspended on the ceiling or the cross beam, and the charging pile is provided with a charging cable; the wire coil comprises a first half wire coil and a second half wire coil which are oppositely buckled into a whole, and a wire twisting prevention structure is arranged at the butt joint position of the first half wire coil and the second half wire coil; one end of the charging cable is sequentially wound on the first half wire coil, penetrates through the anti-twisting wire structure, then is wound on the second half wire coil and then is connected with the charging gun; the two electric winches are suspended on a ceiling or a cross beam and are used for driving the wire coil to lift through a suspension rope so as to enable the charging cable to be wound and unwound in an anti-torsion manner; the radio sensor is arranged on any electric winch and used for sensing arrival or departure of the corresponding vehicle, and the radio sensor is in communication connection with the electric winches and used for controlling descending or ascending of the two electric winches; automatic lifting can be achieved based on parking of a vehicle, and a charging cable is effectively wound and unwound in an anti-torsion mode through the cable coil structure.

The invention relates to the technical field of lithium ion batteries, in particular to a composite positive pole piece, a preparation method of the composite positive pole piece and a lithium ion battery, the composite positive pole piece comprises a positive current collector, a negative current collector, a positive electrode and a negative electrode, and the positive current collector is provided with two opposite surfaces; the positive electrode active material layer is arranged on at least one surface of the positive electrode current collector; and the solid electrolyte layer is arranged on the positive electrode active material layer. According to the lithium ion battery, the solid electrolyte layer is arranged on the positive active material layer, so that the battery can pass needling, overcharge and short-circuit test inspection, and the use safety of the lithium ion battery is comprehensively improved.

The utility model relates to a special vehicle for hydrogen storage, hydrogen transportation and dehydrogenation. The special vehicle mainly comprises a container and a transportation vehicle, wherein the container is provided with hydrogen storage, hydrogen transportation and dehydrogenation equipment; the equipment for storing, transporting and dehydrogenating the hydrogen is arranged in a container to form the container provided with the equipment for storing, transporting and dehydrogenating the hydrogen; the container is fixed on the chassis of the transport vehicle to form a whole body, so that the special vehicle for storing, transporting and dehydrogenating hydrogen is formed; the special vehicle disclosed by the utility model can be used for implementing a coordinated service of hydrogen storage, hydrogen transportation, dehydrogenation and hydrogen supply, has the advantages that the hydrogen storage capacity of a transportation vehicle is high, hydrogen transportation and dehydrogenation are carried out at normal pressure, hydrogen transportation at normal pressure is safe and reliable, potential safety hazards possibly occurring in transportation of hydrogen stored in a high-pressure bottle are overcome, and the special vehicle has good industrial practicability.

The invention provides a base station antenna, the base station antenna comprises a reflecting plate and a phase shifter, the reflecting plate is provided with a groove, the phase shifter comprises a phase shift circuit, a phase shift medium and a radio frequency ground, the phase shift circuit is covered on an opening of the groove in an insulation manner, the groove wall of the groove forms the radio frequency ground, and the radio frequency ground is arranged in the groove. The phase shift medium comprises a first sliding medium, the first sliding medium is arranged in the groove, and the first sliding medium moves relative to the phase shift circuit to adjust the phase. According to the base station antenna, the phase shifter is integrated on the reflecting plate, and particularly, the phase shifting medium is arranged in the groove in the reflecting plate, so that the size of the antenna is remarkably reduced, the antenna is more compact and light, and the internal space layout of the antenna is optimized.

The invention discloses a method for simply and conveniently activating oxidation reduction of oxygen ions of a sodium ferrimanganate positive electrode material in the technical field of preparation of a sodium ion battery positive electrode material. The method comprises the following steps: S1, mixing a sodium source and a ferrimanganese metal source to obtain a mixed solution; s2, quickly stirring in a water bath kettle, adding concentrated nitric acid, and taking out a separated solid; s3, drying the solid to obtain powder; s4, pre-sintering the powder in a tubular furnace, sintering at high temperature, cooling to room temperature along with the furnace temperature, and taking out to obtain a sintered product; s5, grinding into powder, and sieving to obtain the sodium ferrimanganate positive electrode material (NaxFeyMnzOn), wherein 0.44 lt; xlt; 0.8, 0 lt; yt; Yt; 1, 0lt; zlt, zlt; 1, 1.6 lt; nlt; 2.2. The sodium ferrimanganate positive electrode material prepared by the method has relatively high purity and good crystallinity, various elements are uniformly distributed, and nitric acid is introduced to provide a strong oxidation environment, so that the content of Mn < 4 + > is increased, an oxidation-reduction reaction of oxygen ions in a layered metal oxide is triggered in a charge-discharge process, and the discharge specific capacity of the material is remarkably improved.

The invention discloses an integer slot concentrated full-pitch flat wire winding structure and a flat wire motor, and relates to the technical field of motors. Each branch of each phase of the integral-slot concentrated whole-pitch flat wire winding structure comprises one or more coil units, each coil unit is composed of four coil groups, each of the first coil group and the third coil group comprises a same-layer hairpin, the second coil group comprises N / 2-1 cross-layer hairpins, and each cross-layer hairpin comprises N / 2-1 cross-layer hairpins. The two effective conductors of the cross-layer hairpin are located on the adjacent layers of flat wires in different grooves, the fourth coil assembly is obtained by rotating the second coil assembly by m stator grooves in the circumferential direction, and m is the phase number of the winding motor. According to the invention, the stator adopts an integral pitch winding and is matched with a concentrated winding scheme that the number of slots per pole per phase is 1, so that the motor can obtain the maximum winding coefficient; only N / 2 + 1 types of hairpins are needed, and the types of the hairpins are reduced, so that the purposes of reducing the processing difficulty, the assembly complexity, the manufacturing cost and the maintenance difficulty of the flat wire winding are achieved.

The invention relates to an integrated carbon / carbon composite material crucible containing a pyrolytic carbon transition coating, and belongs to the technical field of thermal field parts for monocrystalline silicon. The crucible comprises a carbon / carbon composite material crucible body, a glassy carbon coating, a pyrolytic carbon transition coating and an yttrium oxide coating, wherein the glassy carbon coating not only has a good combination effect with the carbon / carbon composite material crucible body, but also can prevent carbon from escaping; the thermal expansion coefficient of the pyrolytic carbon transition coating is close to that of the glassy carbon coating, and the combination effect of the pyrolytic carbon transition coating and the yttrium oxide coating is good; the yttrium oxide coating has excellent thermal stability and excellent silicon erosion resistance, and can ensure the purity of molten silicon in the single crystal drawing process; the carbon / carbon composite material crucible body is formed by densifying a carbon fiber prefabricated body which is formed by needling and laying a pure net tire sprayed with resin, and the inner surface of the carbon / carbon composite material crucible body is a net tire which is wholly approximately isotropic, so that the overall mechanical strength of the crucible can be ensured, and a good combination effect of the crucible and a subsequent functional coating can also be ensured.

The invention relates to the technical field of optical fiber lasers, and provides an ultra-wideband tunable optical fiber communication light source based on gas stimulated Raman scattering. Comprising a 1 [mu] m wave band seed source, an electro-optical modulator, a signal generator, an optical fiber amplifier, a solid core-hollow core compact coupling device, an optical fiber end cap, a hollow core optical fiber, a miniature gas cavity, a lens and a dichroic mirror, and the tuning range of the methane gas 1 [mu] m wave band tunable pumping source at least covers 1024-1126 nm. The laser can be converted into communication wave band laser covering the whole S + C + L + U wave band, and benefited from the Raman characteristic of methane molecules, the output laser under single wavelength pumping has a corresponding narrow-linewidth single spectral line, no accompanying ASE noise amplification and the like, and secondary filtering is not needed for selection; and meanwhile, the use of the hollow-core optical fiber ensures that the output laser is only a single mode, and high beam quality can be ensured without other operations.

The invention relates to a wafer recovery method, a diffractive optical waveguide manufacturing method, and a diffractive optical waveguide. The wafer recycling method comprises the following steps that a diffraction optical waveguide to be recycled is provided, the diffraction optical waveguide to be recycled comprises a substrate wafer, a cut-off layer and a grating wafer which are arranged in a stacked mode, and the surface of the cut-off layer and / or the surface of the grating wafer have defects caused by etching; carrying out etching and / or chemical mechanical polishing on the defect surface of the diffraction optical waveguide to be recycled until the preset surface roughness is reached, so as to obtain a recycled wafer; the manufacturing method of the diffraction optical waveguide comprises the following steps of forming a thin film wafer on the surface of a cut-off layer of a receiving sheet, and carrying out etching treatment on the surface of the thin film wafer, and S3, before manufacturing is completed, if the cut-off layer and / or the surface of a grating wafer have defects caused by etching, preparing a recycled wafer according to the recycling method. According to the method, recycling of unqualified products is achieved, the production cost is reduced, the stability of the performance of the recycled products is improved, and the method is suitable for medium-batch and large-batch machining and manufacturing of the silicon carbide diffraction optical waveguides.

The present invention provides a semiconductor device and a method for manufacturing the same. The method for manufacturing the semiconductor device includes: providing a substrate, the substrate including an NMOS device region and a PMOS device region, and gate structures are formed on the substrates of the NMOS device region and the PMOS device region; forming a buffer layer on the substrates of the NMOS device region and the PMOS device region, and the buffer layer covers the gate structure; removing the buffer layer on the NMOS device region; forming a stress layer on the buffer layer; when the stress layer is a tensile stress layer, the thickness of the buffer layer on the PMOS device region is greater than the thickness of the buffer layer on the NMOS device region; when the stress layer is a compressive stress layer, the thickness of the buffer layer on the NMOS device region is greater than the thickness of the buffer layer on the PMOS device region. The technical solution of the present invention can improve the performance of one of the NMOS device and the PMOS device and avoid reducing the performance of the other device while avoiding increasing the chip manufacturing cost.

The invention discloses long-life bearing steel, a preparation method thereof and electroslag remelting casting powder, the long-life bearing steel is prepared by electric furnace or converter smelting, LF refining, vacuum degassing, continuous casting or die casting pouring, electroslag remelting and rolling, and rare earth alloy lanthanum and cerium are added into molten steel before continuous casting or die casting. And new electroslag remelting protection slag is designed, so that the problem that the contact fatigue life of the bearing steel is influenced by precipitation of inclusions and carbides is solved, and the 4.5 GPa contact fatigue life L10 value of the bearing steel can be stably increased to 5 * 10 < 7 > or above, so that the requirements of bearing steel in high-end fields such as high-speed rail bearings, aviation bearings and wind power bearings are met.

The application discloses a bridge maintenance vehicle, which is driven by a single motor and is supported by a three-point support structure, fundamentally solves the risk of rail clamping and rail derailment caused by the asynchronization of a double-motor system, and greatly improves operation safety. The single driving motor makes the control system more simple and light, brings economic advantages of low manufacturing cost, convenient installation and easy maintenance, avoids rail clamping and stop, ensures smooth bridge maintenance operation, and significantly improves maintenance efficiency.

The invention discloses a female terminal, which can restrain large size of the female terminal, stably guarantee following performance or contact pressure of a male terminal, restrain deformation of the female terminal and improve assembling performance even under the condition that large current needs to be handled. A female terminal (10) is provided with: a main body section (18) having a box-shaped conductor section (16); and a pair of contact forming members (22a, 22b) having a plate thickness smaller than that of the main body portion (18), the box-shaped conductor portion (16) having a rear opening window (30), the pair of contact forming members (22a, 22b) including a first spring piece (60) having a first contact (66) and a second spring piece (64) having a second contact (68), and being provided with a contact pressure applying spring (82), the contact pressure applying spring (82) is disposed on the protruding end portions (74) of the first spring piece (60) and the second spring piece (64), and can be inserted through the rear opening window (30), and the first contact (66) and the second contact (68) are crimped to the male terminal (12) by pressing the protruding end portions (74) in the direction in which the protruding end portions (74) approach each other by the contact pressure applying spring (82) as the male terminal (12) is pressed in.

The invention relates to the technical field of optical fiber lasers, and proposes an ultra-wideband tunable optical fiber communication light source based on gas stimulated Raman scattering, comprising a 1μm band seed source, an electro-optic modulator, a signal generator, an optical fiber amplifier, a solid-hollow compact coupling device, an optical fiber end cap, a hollow-core optical fiber, a micro gas cavity, a lens, a dichroic mirror, and a methane gas 1μm band tunable pump source. The tuning range covers at least 1024nm-1126nm. Based on the stimulated Raman scattering effect of methane gas, it can be converted into a communication band laser covering the entire S+C+L+U band. Thanks to the Raman characteristics of methane molecules, the output laser has a corresponding narrow line width single spectral line under single wavelength pumping, without accompanying ASE noise amplification, etc., and does not need to be selected through secondary filtering. At the same time, the use of the hollow-core optical fiber ensures that the output laser is only single-mode, and high beam quality can be guaranteed without other operations.

The invention discloses a laser output optical device, a laser, equipment and a method. The laser output optical device comprises an output optical fiber, an optical waveguide and an optical output head which are connected in sequence, the output optical fiber is used for outputting point ring light beams, a cladding layer, wrapping the second fiber core, of at least partial area, close to the output optical fiber, of the optical waveguide comprises a second conical structure, and the cross section of the second conical structure is annular. The outer diameter of the second conical structure is gradually increased in the light beam transmission direction, and the second conical structure is used for adjusting the light path of the point ring light beam so as to adjust the divergence angle of inner and outer ring light beams. And the optical output head is used for outputting the light beam adjusted by the optical waveguide. The pre-modulated light from the output optical fiber is accurately regulated and controlled, the divergence angle of the output light is adjusted, the light beam quality is improved, and meanwhile the device has the advantages of being simple in structure, low in cost and high in stability.

The invention relates to the technical field of aircraft skin mirror image milling, in particular to a method for generating a mirror image milling track of a depression feature with a regular and protruding local contour of a skin. Selecting a closed programming contour boundary line, a skin outer surface and a cutter feeding control point, generating a cutter limit trajectory by the programming contour boundary line along the extension curved surface of the sinking bottom to the effective radius value of the cutter in the sinking area, performing finishing treatment on the limit trajectory, and generating a secondary limit trajectory along the extension curved surface of the sinking bottom to the distance value of the cutter in the sinking area; the secondary limit trajectory is ranked into an ordered line segment. And screening sub-limit trajectory segment boundaries under the condition that the sub-limit trajectory segment line segments are coplanar with the first line segment, identifying and classifying the sub-limit trajectory segment line segments into straight-edge end straight-edge protrusions, arc-edge end straight-edge protrusions, straight-edge end triangular protrusions or arc-edge end triangular protrusions, and correspondingly generating milling trajectory lines. And the milling trajectory of the remaining rectangular area is solved, the limit trajectory and the secondary limit trajectory are connected along the epitaxial curved surface, and finally a complete mirror milling trajectory is formed.

The invention relates to an integrated carbon / carbon composite material crucible prepared based on a multilayer structure prefabricated body, and belongs to the technical field of thermal field parts for monocrystalline silicon. The crucible comprises a carbon / carbon composite material crucible body, a glassy carbon coating and an yttrium oxide coating, the glassy carbon coating can effectively relieve thermal mismatch between the yttrium oxide coating and the carbon / carbon composite material crucible body, and carbon in the carbon / carbon composite material crucible body can be effectively prevented from escaping; impurities are not introduced into the yttrium oxide coating in the silicon melting process, so that the purity of a silicon material can be effectively ensured, and the yttrium oxide coating has excellent silicon erosion resistance and thermal stability; the carbon / carbon composite material crucible body is formed by compacting a multi-layer structure prefabricated body, the multi-layer structure prefabricated body adopts an isotropic net tire as an inner layer, the good combination effect with a subsequent functional coating can be ensured, a carbon cloth / net tire lamination needling laying layer is combined with a carbon fiber winding layer as an outer layer, and the overall mechanical property of the crucible can be ensured.

The invention relates to an oxide dispersion strengthened copper alloy plate and a preparation method thereof, and belongs to the technical field of metal composite materials. The preparation method of the oxide dispersion strengthened copper alloy plate comprises the steps that alloy powder is subjected to internal oxidation to obtain powder containing a dispersion strengthening phase, the powder is reduced and then loaded into a stainless steel sheath to be subjected to hot rolling forming, and finally a pressed blank is sintered at a certain temperature to obtain the oxide dispersion strengthened copper alloy plate. And after sintering, removing the sheath to obtain the oxide dispersion strengthened copper alloy plate. According to the method, the dispersion strengthened copper plate can be directly obtained through the powder wrapping rolling forming technology, the problems that dispersion strengthened copper is poor in machining performance and prone to cracking in the deformation process are solved, the cost can be reduced, the preparation efficiency can be improved, and possibility is provided for large-scale preparation of the dispersion strengthened copper plate.

A circuit board according to an embodiment includes: a first metal layer; and a second metal layer disposed on the first metal layer, in which the first metal layer includes an oxide layer formed by oxidizing a region of a predetermined depth from a lower surface of the first metal layer, the first metal layer and the second metal layer include a plurality of electrode patterns disposed on the oxide layer and spaced apart from each other, the oxide layer insulates the plurality of electrode patterns from each other.

An external fan air supply device for a range hood and a ventilation pipeline is composed of an air supply device, a fan, a pipeline and a sealing connecting piece. The air supply device is an innovative core component and can be made of metal or non-metal materials through machining or injection molding and other processes and equipment. The air supply device is simultaneously connected with the fan arranged outside the pipeline and the smoke exhaust pipeline or the ventilation pipeline of the range hood, the flow guide structure is guided through the air supply device during working, airflow needing to be exhausted or conveyed is sucked and guided out, and therefore the oil smoke exhaust or ventilation effect is achieved. Therefore, the problems that the fan is arranged in the range hood or the ventilating duct, oil dirt and dust are prone to being accumulated, potential safety hazards of fire safety electricity utilization are caused, and cleaning and maintenance are inconvenient are solved, and meanwhile the effective space and gas passing ability in the range hood and the ventilating duct are improved. The safety, the practicability and the application scene universality of the method can generate remarkable economic benefits.

The present invention provides a rotary position sensor, a rotary device and a vehicle, wherein the rotary device includes: a shell having a first shell and a second shell; a motor having a motor terminal; a plurality of gears, including an output gear that outputs the rotation of the motor to the outside; and a sensor that detects the rotation angle of the gear, wherein the sensor is arranged in the second shell and includes: a base, which is provided with a resistor; a first connecting terminal, which is electrically connected to the outside and the resistor; and a second connecting terminal, which is electrically connected to the outside and the motor terminal, wherein the first connecting terminal and the second connecting terminal are arranged on a surface of the base on the first shell side, wherein the motor terminal is located on the second shell side relative to the base, wherein in the base, the second connecting terminal is arranged on the motor side relative to the first connecting terminal, and the connecting portion of the second connecting terminal electrically connected to the motor terminal is arranged on a surface of the base on the first shell side.

The invention discloses a common-aperture dual-frequency antenna with a directional diagram conformal characteristic, and belongs to the technical field of microwave antennas. According to the antenna array disclosed by the invention, the high-frequency radiation pattern can still keep stable performance under the condition that the high-frequency antenna and the low-frequency antenna are in the same aperture. The high-frequency antenna unit and the low-frequency antenna unit both adopt annular dipole radiators, and a feed part adopts a balance balun; the radiation arm of the low-frequency unit does not need to be modified, and coupling can be eliminated only through induction of a simple patch, so that the design process and the design complexity of the base station common-caliber antenna are greatly simplified. The antenna array has a wide prospect in design and application of base station antennas.

The utility model belongs to the technical field of well lids, and particularly relates to a self-tightening well lid which comprises an upper well lid body and further comprises a stainless steel layer fixedly arranged in the upper well lid body, an aluminum alloy layer fixedly arranged at the bottom of the stainless steel layer, a titanium alloy layer fixedly arranged at the bottom of the aluminum alloy layer and an upper well lid body. The anti-corrosion layer is fixedly arranged at the bottom of the titanium alloy layer, the upper well lid can be used for protecting power equipment, then the attractiveness of the upper well lid is enhanced through the anti-rust function of the stainless steel layer, then the weight of the upper well lid is reduced through the light weight effect of the aluminum alloy layer, and workers can lift the upper well lid conveniently; the strength of the upper well lid is enhanced through the high strength of the titanium alloy layer, the corrosion resistance of the anti-corrosion layer is used for enhancing the corrosion resistance of the upper well lid, the upper well lid is prevented from being eroded by rainwater, the upper well lid is made of strong enough materials and cannot be damaged after being ground by an automobile, and the service life of the upper well lid is prolonged.

This invention provides a steel material and a method for manufacturing the same, as well as a can and a method for manufacturing the same. The steel material of this invention has the following composition: by mass % C: 0.200% to 0.700%, Si: 0.05% to 1.00%, Mn: 20.0% to 40.0%, P: less than 0.030%, S: less than 0.0050%, Al: less than 5.00%, Cr: less than 7.0%, N: less than 0.0500%, O: less than 0.0050%, Ti: less than 0.005%, Nb: less than 0.005%, and contains one or more elements selected from Ca: less than 0.0100%, Mg: less than 0.0100%, and REM: less than 0.0200%, with the remainder consisting of iron and unavoidable impurities; the microstructure is such that the maximum crystal grain size at a position 1 mm below the surface of the steel is less than 200 μm.

The invention discloses a lead frame of a photoelectric coupler, a laminated structure and the photoelectric coupler, the lead frame of the photoelectric coupler comprises a first lead support and a second lead support, a first connecting strip is arranged between the two lead supports, a first frame module is arranged on the first connecting strip, and a second frame module is arranged on the second lead support. Comprising a plurality of first frame units in mirror image distribution; the first frame unit comprises a first base island, a second base island, a third base island, a first connecting bridge, a second connecting bridge and a third connecting bridge; fourth connecting bridges are connected between the first base islands of the adjacent first frame units in the first frame module, fifth connecting bridges are connected between the fourth connecting bridges and the first connecting strips, and the fourth connecting bridges and the fifth connecting bridges are arranged in a T shape. According to the lead frame, the T-shaped connecting bridges are arranged between the adjacent frame units, so that the stability of the lead frame is effectively improved, the drainage glue channels between the adjacent frame units are narrowed, the glue consumption of an inner-layer packaging body is reduced, and the manufacturing cost is reduced.

The invention relates to the field of metal, in particular to a magnesium alloy and a preparation method thereof. The preparation method provided by the invention comprises the following steps: burdening according to the target alloy composition: 1.0-2.5% of Gd; 0.03% to 0.15% of Ni; the balance is Mg and inevitable impurities; then smelting, refining and casting are carried out, and then first-time extrusion deformation treatment and second-time extrusion deformation treatment are carried out in sequence. According to the invention, the composition proportion of the alloy is adjusted, meanwhile, the preparation of the alloy is completed by controlling technological conditions in the preparation process, especially by two times of extrusion and controlling different extrusion ratios, the mechanical property and the elongation of the alloy are improved, and the finally obtained alloy has moderate strength and high elongation and can be dissolved.

The purpose of the present invention is to provide a technique capable of suppressing the outflow of molten solder during reflow soldering and suppressing an increase in the manufacturing cost of a semiconductor device. A method of manufacturing a semiconductor device includes: a step of mounting a semiconductor mounting substrate positioning jig having a frame shape in a plan view on a base plate; a step for disposing a plate-like solder at a semiconductor mounting substrate disposing position, which is a position at which the semiconductor mounting substrate is disposed in a frame of a semiconductor mounting substrate positioning jig mounted on the base plate; a step for disposing a semiconductor mounting substrate on the plate-shaped solder; mounting a frame-shaped solder flow prevention jig so that the side surface of the semiconductor mounting substrate is surrounded in the frame of the semiconductor mounting substrate positioning jig mounted on the base plate; and a step for bonding the base plate and the semiconductor mounting substrate by reflow soldering.

The present application relates to a kind of machining center chip flushing device, and it is related to the technical field of machining;The present application can solve the following problems existing in the process of machining in prior art:First, by setting rotating ball, flushing pipe and drive module, the angle of rotation of rotating ball is adjusted using drive module, the angle of flushing pipe on rotating ball jetting cutting fluid is adjusted, to adapt to the need in actual machining of different workpieces, prevent workpiece from blocking the contact of cutting fluid with workpiece interior and tool, prevent thermal damage of tool and workpiece, ensure processing quality and prolong tool life. Then, by clamping piece and fixing mechanism, it is convenient to replace rotating ball, corresponding rotating ball can be used for different size workpieces, the diameter of flushing pipe on rotating ball is different, different flow of cutting fluid is sprayed out, to prevent excessive cutting fluid from causing waste in the process of machining smaller workpiece, increase the manufacturing cost of workpiece.

The invention relates to the technical field of gearbox gear shifting control, and discloses a tractor pneumatic control gear engaging device which comprises an upper cover fixedly installed on a gearbox, gear shifting blocks and air cylinder assemblies, the multiple gear shifting blocks are installed in the upper cover in a sliding mode, and the telescopic ends of the air cylinder assemblies are used for pushing and pulling the gear shifting blocks to horizontally move left and right. The air cylinder assembly comprises a cylinder body, a first piston and a second piston are installed on the cylinder body in a sliding mode, and a first air injection hole, a second air injection hole and a third air injection hole are formed in the surface of the cylinder body. According to the pneumatic control gear engaging device, the air cylinder assemblies capable of achieving three-gear positioning are arranged, the air cylinder assemblies can drive the gear shifting blocks to be switched among the high gear, the neutral gear and the low gear, the requirement for controlling the meshing sleeve to slide left and right is met, the multiple air cylinder assemblies control the gear shifting blocks to act independently, a gear selecting air cylinder set is omitted, the overall structure of a gear engaging mechanism is simplified, and the gear engaging device is convenient to use. The size is reduced, the failure rate is reduced, and convenience is provided for later use, maintenance and debugging.

The present invention discloses a safe storage infusion set, including an infusion hose, the infusion hose is provided with a side cone, the bottle needle sheath includes a sleeve, the top of the sleeve is connected to a syringe, the syringe sleeve contains an aerosol capsule, the side cone is used in conjunction with the sleeve, and the syringe is used in conjunction with a needle handle. The advantage of the present invention is that only a side cone is added to the entire infusion set system, and only a simple structural change is made to the bottle needle sheath, which does not increase the manufacturing cost much, but at the same time solves the problem of making the sheath easy to clean, preventing contaminated needle punctures, infection of medical personnel, and easy disposal of the bottle needle sheath. When disposing of the used infusion set, the residual liquid medicine will not flow back and pollute the environment.