53results about How to "Improve manufacturability" patented technology

According to the high-flame-retardant cryogenic insulating material and the preparation method and application thereof, low-hydroxyl-value flame-retardant polyester polyol and a flame retardant are adopted, the dosage of a chemical foaming agent is reduced, a physical foaming agent reduces the foam density and takes away heat, the flame retardance of a polyurethane material is improved, meanwhile, the reaction rate is reduced, the core burning risk is reduced, the oxygen index is larger than 30%, and the heat conductivity is smaller than 0.022 W / mK at 25 DEG C; the flame retardant grade is high; the polyester polyol has activity, so that the requirement on the activity of the catalyst and the dosage of the catalyst are reduced, and the odor grade is lower than 2.5; the low-hydroxyl-value flame-retardant polyester polyol is combined with high-functionality polyether polyol A and B for use, so that the foam size stability is improved, the foam shrinkage risk is reduced, the density of the product is 40-45 kg / m < 3 >, the compression strength is larger than 250 kPa, the tensile strength is larger than 350 kPa, the water absorption rate is smaller than 0.5%, and the size stability is smaller than 1% at-196 DEG C; the catalyst and the retarder balance milky white and gelation time, gentle the foaming rate, prevent core burning and match continuous production at the same time, the process performance is stable, the product performance is excellent, the productivity and efficiency are improved, and the cost is greatly reduced.

The invention discloses a manufacturing method of thin-gauge low-yield-ratio Q500qE bridge steel, and belongs to the field of steel manufacturing. The method comprises the steps of component design, casting, heating, rolling, cooling and the like, and finally the required finished steel plate is obtained. The low-temperature impact resistance of the steel plate can be ensured while high strength and low yield ratio of the steel plate are effectively ensured under the condition of low alloy addition. Besides, controlled rolling, cooling and heat treatment processes are combined, the steel plate in the TMCP + T state is obtained, a microstructure with refined ferrite and bainite as main components is obtained in the whole plate thickness, the steel plate has the mechanical property characteristics of high strength, low yield ratio and high toughness, and the low-temperature impact toughness is that the fracture fiber section rate can reach 85% or above at the temperature of-40 DEG C. According to the steel plate, the target performance requirement can be met, the plate shape of the steel plate can be guaranteed, the steel plate has good comprehensive mechanical performance, in addition, the manufacturing cost is low, the carbon content is low, the weldability is greatly improved, and the steel plate has high manufacturability.

The present invention discloses a C-band all-solid-state broadband high-power amplifier, which belongs to the field of communication technology. It includes a splitter, a power amplifier, and a combiner; the splitter and the combiner are realized by radial power synthesis; the power amplifier and the combiner are installed on the same bottom radiator; the signal after power division by the splitter enters the power amplifier through a radio frequency cable and is amplified, and then output to the broadband combiner through a coaxial interface; the combiner performs power synthesis and then outputs. The present invention realizes a broadband high-power amplifier by adopting a combiner with an easy-to-assemble coaxial interface and a modular power amplifier module, thereby improving the maintainability of the equipment and enhancing the stability of the system.

The application discloses a parallel polynomial gradient calculation system and method based on a CMOS nerve synapse transistor, and relates to the technical field of calculation systems.The parallel polynomial gradient calculation system based on the CMOS nerve synapse transistor adopts a basic calculation unit containing at least one CMOS transistor, and configures the CMOS transistor to exhibit the dual-mode characteristics of neuron behavior and synapse behavior in a floating substrate operation mode, and meanwhile, combines a parallel array architecture, so that the application realizes a neuromorphic calculation hardware based on a standard CMOS process, utilizes mature CMOS manufacturing technology, avoids special materials and post-integration processes required by emerging devices such as memristors, thereby improving the manufacturability and yield of the system, and reducing production costs.Meanwhile, the inherent device consistency and long-term stability of the CMOS transistor effectively overcome the problems of large differences between devices and state drift in the memristor scheme, and realize high-precision polynomial gradient calculation.

The application discloses a kind of copolymer organic semiconductor devices based on isolation and interconnection and preparation method, including substrate, photoetching blocking layer, insulating isolation layer, N organic field effect transistor and N-1 interconnection line;Photoetching blocking layer includes isolation layer and inorganic dielectric layer;Isolation layer is opened with N longitudinal through isolation groove along length direction;Inorganic dielectric layer includes lower dielectric layer and upper dielectric layer;Lower dielectric layer is located in N isolation, and upper dielectric layer is laid on the top of isolation layer and lower dielectric layer;Each organic field effect transistor includes semiconductor layer, source, drain and gate;Semiconductor layer is laid in the isolation groove at the bottom of corresponding lower dielectric layer section, and its material is organic copolymer.The application effectively utilizes isolation groove and photoetching blocking layer, and the semiconductor layer of different semiconductor materials is wrapped and isolated, so as to realize the integration of different organic field effect transistors on the same substrate, and the organic field effect transistor can realize effective interconnection.

The invention discloses a reversible dynamic aperture solid nanopore array based on a temperature-sensitive phase change layer and a preparation method and application of the reversible dynamic aperture solid nanopore array, and belongs to the technical field of single molecule detection and nanostructure regulation, the array introduces the temperature-sensitive phase change layer into the inner wall of a solid nanopore, and when the local temperature crosses the phase transition point of the temperature-sensitive phase change layer, reversible volume change is generated; therefore, the effective aperture of the nanopore is continuously adjustable in a sub-nanometer scale range. An independent micro heating unit and an independent temperature sensing unit are integrated below each nanopore in the array, and single-pore-level accurate temperature control adjustment is achieved in a row-column addressing mode. In combination with ionic current monitoring and an external control module, the aperture can be set in real time according to the size requirements of different target molecules, and dynamic aperture regulation and control with a programmable structure, quick response and good repeatability are realized. The array structure provided by the invention is suitable for single molecule level detection of objects such as multiple types of small molecule pollutants, tumor-related biomarkers, biomacromolecules and the like, and has the advantages of high sensitivity, high flux and wide applicability.

A respiratory therapy system configured to provide respiratory therapy to a patient breathing in successive breathing cycles including an inspiration phase and an expiration phase, the system comprising: a pressure generator configured to supply a flow of pressurised air, the pressure generator configured to couple with a patient interface via an air circuit to deliver the pressurised air from the pressure generator to the patient; at least one sensor configured to provide one or more signals indicative of a pressure and a flow rate of the pressurised air flow; and a controller including a processor configured to: repeatedly detect values of instantaneous pressure and values of instantaneous flow rate from the one or more signals from the at least one sensor; repeatedly calculate instantaneous conductance values based on the values of instantaneous pressure and values of instantaneous flow rate; and monitor changes in the instantaneous conductance values over time to detect an occurrence of a respiratory event within the system.

This invention provides a sandwich-toughened ceramic-based fuel element and its additive manufacturing method, belonging to the field of nuclear reactor fuel technology. The element includes an outer shell and an inner shell, with an annular gap between them forming a sandwich space containing a silicon carbide whisker toughening structure. The method includes: additively manufacturing a double-layer shell, the geometry of which can be flexibly designed; preparing the sandwich toughening structure, which can be formed by injecting SiC whisker slurry into the sandwich space and solidifying it, or by generating self-grown whiskers in situ within the sandwich space through heat treatment of a Si and C raw material system; subsequently performing chemical vapor infiltration pretreatment; completing fuel loading and opening end sealing; and further performing enhanced CVI densification treatment. This invention introduces a sandwich toughening structure without significantly increasing the structural complexity of the element, effectively improving the fracture toughness, crack resistance, structural stability, and service stability of SiC-based fuel elements.

The application discloses a kind of threshold beam profile structure optimization system and method, the system includes initial modeling module, key variable screening module and stage optimization module.Initial modeling module is used to fill the stiffener model in the cavity of the base profile section, generates initial section and finite element model.Key variable screening module passes through calculating the sensitivity of section shape variable to vehicle body bending modal frequency and side column collision intrusion, and screens out key design variable.Stage optimization module is based on key design variable, and section optimization, length optimization and stiffener optimization are sequentially executed, and the optimized stiffener layout is obtained.The application solves the problem that traditional method is difficult to cooperatively optimize section shape, length and stiffener parameters to balance lightweight and multiple performance requirements, can significantly reduce the weight of threshold beam, and shorten the optimization cycle.

This invention discloses a six-phase reactor for an energy storage converter, belonging to the field of reactor technology. It includes a first reactor assembly and a second reactor assembly. The first reactor assembly includes a first base, which is composed of a U-shaped support plate and an L-shaped support plate, allowing for independent and stable placement. The second reactor assembly includes a second base, mainly composed of an L-shaped support plate, which is temporarily stabilized during manufacturing using a detachable support fixture. After each reactor assembly independently completes overall impregnation and drying, the support fixture is removed. Then, the surfaces of the terminals and connectors to be connected in parallel are polished and the paint is removed. The two bases are then fixed using base connectors, and the corresponding phase terminals are electrically connected in parallel using a phase-parallel connector to form a six-phase output. This invention, through differentiated base design and fixture assistance, allows the two reactors to be impregnated separately before being connected in parallel, balancing impregnation process quality and electrical connection reliability, and also helps to reduce the overall size of the unit.

This invention discloses a field-of-view extended solar sensor based on diffraction order multiplexing, comprising a dual-band bandpass filter, a diffractive light introducer, and a color CMOS image sensor. The dual-band bandpass filter selects two separate, preset wavelengths of sunlight for incidence, while the diffractive light introducer diffracts the transmitted sunlight into multi-order beams. The color CMOS image sensor acquires diffraction spot images containing spectral information from both wavelengths. The current effective diffraction order is determined by the mapping relationship between the centroid positions and spot spacing of the spots in the two corresponding wavelength channels and the diffraction order. Finally, the solar vector is calculated using a diffraction optics model. This invention resolves the inherent contradiction between large field of view and high precision in traditional digital solar sensors, effectively overcoming the order ambiguity problem in diffraction-extended field of view. Its lightweight design adapts to high-density integration requirements, providing technical support for spacecraft attitude measurement.

This invention discloses a biomimetic wear-resistant hub structure and a centrifugal pump impeller, relating to the field of fluid machinery anti-silt erosion technology. The biomimetic wear-resistant hub structure is based on a fractal Z-shaped structure designed biomimeticly to mimic the multi-layered structure of scales on the surface of a desert lizard, and is arranged on the hub body in the easily worn areas adjacent to the suction inlet of each blade. Each fractal Z-shaped structure utilizes rigid support components such as a primary contact crown surface and a primary contact saddle to provide primary support, and utilizes a primary energy dissipation truss composed of multiple secondary Z-shaped structural units to achieve stepwise energy dissipation. Through this rigid-flexible coupled multi-scale fractal structure, multi-scale vortices can be induced in the flow field, altering the trajectory of sediment particles, reducing impact kinetic energy, and optimizing the impact mode, thus synergistically improving the hub's wear resistance from a solid-liquid two-phase mechanical perspective. This invention has a clear structure, strong manufacturability, and can significantly reduce the wear rate of the hub under sandy water flow conditions, extending the service life of the equipment.

The utility model discloses a shaping assembly for a shaping machine, which comprises a shaping piece A and a shaping piece B. The shaping piece A comprises a base and a supporting part, the supporting part is arranged on the base, and the shaping piece B is provided with a groove A. Through the arrangement of the inclined part and the plane part, the plane part is prevented from being pressed on the lead of the to-be-shaped piece in the shaping process, the electroplated layer of the lead is not damaged when the to-be-shaped piece is subjected to primary shaping, the to-be-shaped piece is well shaped, and the shaping production process requirement is met. According to the summary of long-term use conditions of more than one year, the conductive polymer chip capacitor is stable in process performance, suitable for E-shell and H-shell conductive polymer chip capacitors, and capable of meeting the requirements of product shaping production process at the same time.

The invention discloses a delay search method and system for a delay phase-locked loop, a computer and a medium, and the method comprises the following steps: enabling a signal to activate a finite-state machine, and jumping to a search state; based on the preset configuration of the finite-state machine, linear step length search is carried out in the guard band range to locate a target phase, if the target phase is not found in the guard band range, linear step length search is carried out again after the guard band range is expanded, and when the real-time phase is equal to the target phase, a symbol state is entered; in the symbol state, the slope of real-time phase change is calculated, and symbol matching is verified; and if the symbols are matched, entering a phase-locked state, fixing a real-time delay change value in the phase-locked state, and pulling up a phase-locked loop activation signal. According to the invention, the digital code which is output by the phase discriminator and represents the phase relationship between the reference clock and the input clock can be received, the delay is searched in a linear search mode, the control signal is sent to the delay line, and the clock delay is changed until the clock meeting the requirement is generated.

The invention provides a preparation method of a silicon carbide step groove and a groove type silicon carbide device. The preparation method comprises the following steps: growing an etching mask layer on an epitaxial layer; carrying out photoetching process treatment on the etching mask layer; performing dry etching on the patterned etching mask layer to the upper surface of the epitaxial layer by taking the patterned photoresist as a mask to form a patterned etching mask layer, and etching the epitaxial layer by taking the patterned etching mask layer as a mask to form a first-stage groove; oxidizing a part of the etching mask layer into silicon dioxide by using a wet oxygen oxidation process, and removing the silicon dioxide by using a wet etching process to form a treated etching mask layer; and taking the processed etching mask layer as an etching mask, etching a part of the epitaxial layer close to two side walls of the first groove, forming a second-stage groove based on the first-stage groove, and obtaining a step-shaped groove. Thus, the overhigh electric field of the bottom gate oxide layer is improved, the breakdown phenomenon caused by tip electric field concentration is avoided, and the high-frequency switching circuit requirement of a new energy automobile is easily met.

This invention relates to a welding method for the cylindrical body of a stainless steel composite plate equipment, comprising: 1) cutting a V-shaped bevel into the cylindrical body; 2) tack welding the pre-existing weld gaps using a double-gun TIG welding method; 3) longitudinal welding employing a three-layer welding process: the first layer is completed in one pass using a double-gun TIG welding method; the middle layer is completed in one pass using manual arc welding; and the third layer is completed in one pass using manual arc welding; 4) transverse welding employing a three-layer welding process: the first layer is completed in one pass using a double-gun TIG welding method; the middle layer is completed in one pass using manual arc welding; and the third layer is completed using multiple passes of manual arc welding for a final weld finish. This invention not only improves welding efficiency but also produces excellent weld quality, easily meeting the relevant requirements of drawings and specifications.

The application provides a spatial optical circuit switching array based on a MEMS adjustable metasurface and a control method thereof, and relates to the technical field of optical communication.The array comprises a transmitting end array and a receiving end array;the transmitting end array and the receiving end array each comprise two layers of transmission metasurface layers arranged in parallel;each transmission metasurface layer comprises a plurality of planarly arranged metasurface units;the transmitting end array modulates the phase of the normally incident light of any input optical port to generate outgoing light with a deflection angle;the receiving end array applies a translation compensation opposite to the transmitting end array to the outgoing light to make the outgoing light recollimate and couple to a target output optical port.The control method realizes non-blocking spatial light path reconstruction of multiple light paths concurrently through master-slave cooperative control within a limited displacement stroke.Under the condition of multiple light paths concurrently, the application realizes non-blocking spatial light path reconstruction and dynamic switching within a limited displacement range, and effectively avoids light path crosstalk.

The utility model discloses a connecting structure of a heating body and a water pump of an instant heating module, which comprises the heating body with a water inlet connecting pipe and the water pump with a water outlet connecting pipe, a nut is movably mounted on the water inlet connecting pipe of the heating body in a limiting manner, and an external thread section is arranged at the end part of the water outlet connecting pipe of the water pump. The heating body and the water pump are connected in the mode that a nut is connected to the threaded section of the water outlet connecting pipe in a screwed mode. The heating body is directly connected with the water pump through the nut, so that manufacturability is improved, and miniaturization design of the heating module is facilitated; meanwhile, a silicone tube is omitted, so that the formation of peculiar smell is effectively reduced; and moreover, the water pump can be conveniently disassembled, assembled and replaced by unscrewing or screwing the screw cap, so that the maintenance cost is greatly reduced.

This invention belongs to the field of CNC machine tool technology, specifically providing a topology-optimized right-angle milling head housing for a CNC boring and milling machine and a method thereof. The housing includes a ram connecting part, a right-angle rotating milling head connecting part, and a transition part connecting the ram connecting part and the right-angle rotating milling head connecting part. The ram connecting part includes a tapered cylinder with end plates at both ends. A plurality of connecting posts are provided between the two sets of end plates, and threaded holes are provided through the connecting posts. The optimized milling head housing exhibits reduced weight and significantly improved static and dynamic characteristics.

The invention discloses a compact motor-driven pedal assembly, and relates to the technical field of force feedback equipment. The assembly comprises a supporting base, a driving motor, a pedal assembly, a transmission system and a vertical mounting plate. The driving motor and a shell of the second-stage speed reducer are fixed to the same side of the mounting plate, the motor is mounted lower than the speed reducer in the vertical direction, the first-stage belt transmission mechanism is arranged on the other side of the mounting plate, a driving wheel and a driven wheel of the first-stage belt transmission mechanism are arranged in a vertically staggered mode to be matched with dislocation of the motor and the speed reducer, and an output shaft of the second-stage speed reducer directly forms a pedal rotating shaft. According to the staggered same-side layout, the wiring space of the motor is sufficient, and the ultra-compact size (smaller than or equal to 170 * 132 * 180 mm) is realized. The side-mounted buffering limiting piece is composed of a screw wrapped with a silicone tube, and the force sensor is connected between the pedal face and the connecting rod arm in series. According to the invention, the assembly convenience and the force feedback performance are considered while the structure is extremely compact.

A respiratory therapy system configured to provide respiratory therapy to a patient breathing in successive breathing cycles including an inspiration phase and an expiration phase, the system comprising: a pressure generator configured to supply a flow of pressurised air, the pressure generator configured to couple with a patient interface via an air circuit to deliver the pressurised air from the pressure generator to the patient; at least one sensor configured to provide one or more signals indicative of a pressure and a flow rate of the pressurised air flow; and a controller including a processor configured to: repeatedly detect values of instantaneous pressure and values of instantaneous flow rate from the one or more signals from the at least one sensor; repeatedly calculate instantaneous conductance values based on the values of instantaneous pressure and values of instantaneous flow rate; and monitor changes in the instantaneous conductance values over time to detect an occurrence of a respiratory event within the system.

The magnetomechanical capsule may include a body, a first magnet attached to a first end of the body, a second magnet attached to a second end of the body, and a third magnet disposed between the first magnet and the second magnet. In some cases, the third magnet is configured to oscillate in response to an external magnetic field to generate a second magnetic field.

The application discloses a kind of topological optimization methods for flexible airfoil based on aerodynamic driven particle flow, it is related to aircraft structure design technical field, including: S1, based on NURBS model construction and initialization, generate uniformly distributed particles in parameter space, and it is distributed on the wing geometry model in physical space and completes initialization;Definition design parameter, including material attribute, structure size, aerodynamic parameter and boundary condition;Using smooth particle hydrodynamics kernel function, particle information is projected and mapped to control point and gauss point, establish the link between design variable and geometric control point.This method not only greatly enhances the accuracy and stability of flexible wing large deformation structure topology reconstruction, but also can directly output absolute smooth sawtooth-free CAD continuous boundary, significantly improve the safety, reliability and manufacturability of advanced slender aircraft structure design.

This invention discloses a nucleic acid molecule encoding a modified retroviral Gag protein and its applications. The Gag protein contains an engineered acylated tag sequence at its N-terminus, comprising: a glycine residue at the second position after the initiating methionine for myristylation modification; and / or a cysteine ​​residue in the N-terminal region for palmitoylation modification. The tag sequence is selected from SEQ ID NO:1, 3-9, or derivative amino acid sequences having at least 80% identity and retaining function. Preferably, the modification involves replacing the first 9 amino acids at the N-terminus of the wild-type HIV-1 Gag protein with the aforementioned tag to enhance membrane anchoring and improve viral packaging efficiency. This invention also provides packaging plasmids containing this molecule, host cells, packaging systems, and preparation methods. This invention can significantly improve viral yield and titer, and is particularly suitable for overcoming the efficiency bottleneck in packaging large-load lentiviruses of 7-10 kb.

This invention discloses a narrowband reflector waveguide and reflector based on a side-coupled Bragg grating resonant cavity, relating to the field of optoelectronics. It includes a main waveguide and a resonant cavity waveguide arranged in parallel. The main waveguide supports TE0 mode transmission, while the resonant cavity waveguide supports both TE0 and TE1 mode transmission. The main waveguide and the resonant cavity waveguide form an asymmetric directional coupling region through side coupling. A first resonant mode and a second resonant mode are formed within the resonant cavity waveguide. A TE0 mode optical signal is input to the main waveguide and coupled to the resonant cavity waveguide, where it is converted into a TE1 mode optical signal. Under the synergistic effect of the first and second resonant modes, the TE1 mode optical signal generates narrowband reflected light of the desired wavelength in TE1 mode. This TE1 mode narrowband reflected light is coupled back to the main waveguide and converted into TE0 mode narrowband reflected light, which is then output from the main waveguide. This narrowband reflector exhibits high reflectivity, narrow linewidth, high side-mode suppression ratio, and good process robustness.

An object of the present invention is to achieve a low delay core applicable to a Master channel of a Master-Slave CPE (MS-CPE) transmission method with a general-purpose refractive index distribution structure. An optical fiber according to the present invention is a single-mode optical fiber, and has an SI-type refractive index distribution structure, in which a clad region relative refractive index difference Δ (%) with respect to a core region refractive index, a radius a (um) of the core region, and a group delay time difference Δτ between the Master channel and the Slave channel satisfy "Mathematical Expression 19" and "Mathematical Expression 20", or has a W-type refractive index distribution structure, in which a mode field diameter MFD is 9.5 to 10.1 um, and a relative refractive index difference Δ1 (%) of a low refractive index layer with respect to a core, a relative refractive index difference Δ2 (%) of the clad region with respect to the core, the core radius a1, and the group delay time difference Δτ between the Master channel and the Slave channel satisfy "Mathematical Expression 41".

The application discloses a spin terahertz emitter with adjustable polarization without an external magnetic field and a manufacturing method thereof. A metal thin film layer heterostructure is deposited on a surface of a glass substrate. A ferromagnetic layer is a FeNi thin film layer, an anti-ferromagnetic layer is an IrMn3 thin film layer, and an interface between the FeNi thin film layer and the IrMn3 thin film layer is an exchange coupling interface subjected to directional magnetic field induction treatment. A surface of the metal thin film layer heterostructure is a periodic stripe array structure. The manufacturing method comprises the following steps: a magnetron sputtering process is used to sequentially deposit a ferromagnetic layer, an anti-ferromagnetic layer and a protective layer; the exchange coupling interface is formed through directional magnetic field induction treatment; and a micro-nano processing process is used for patterning treatment. Beneficial effects are as follows: under the condition of no external magnetic field, reliable spin current generation, spin-charge conversion and terahertz radiation can be realized. The stripe patterning structure realizes linear polarization, elliptical polarization and near-circular polarization output. The 'zero-field emission function' and the 'polarization control function' are integrated in the same thin film device system, and the system complexity is reduced.

The utility model provides a kind of cylindrical battery module heating film structure and cylindrical battery module, it is related to battery technical field, heating film structure includes multiple array arrangement's heating film unit, heating film unit includes first membrane body, second membrane body and heating wire: first membrane body is semicircular structure, for adhering cylindrical battery outer side face;Second membrane body is circular structure, with first membrane body axial connection and for adhering cylindrical battery end face;Heating wire is set in first membrane body and second membrane body, and the heating wire in multiple heating film units is electrically connected in series. Through the modularization heating film unit design, semicircular side heating film and circular end face heating film are combined, the large-area uniform heating to cylindrical battery outer surface is realized, and the structure significantly improves heating efficiency. Semicircular and circular membrane body structure naturally adhere cylindrical battery surface, simplify installation process, avoid the gap between traditional serpentine heating film and cylindrical battery, thereby avoid the emergence of dry burning situation.

The invention provides a photoetching proximity effect correction method and system based on a curve mask, and relates to the technical field of semiconductor manufacturing, and the method comprises the steps: building curvilinear representation of a mask pattern based on to-be-processed layout data, and obtaining a curve boundary and a curve control quantity set thereof; determining a process condition set comprising a plurality of working conditions; aiming at each working condition, calculating an imaging error corresponding to the curve boundary based on a photoetching process model to obtain an error index of each working condition; updating information of the curve control quantity set is generated according to the error index and is iteratively updated, and adaptive adjustment is executed on iteration updating according to the difference between the updating information of different working conditions; and generating a corrected curve mask pattern according to the updated curve control quantity set, and outputting corrected mask data, so that the convergence stability of correction under multiple working conditions and the adaptability to a whole process window are improved.

A split type power output shell connecting structure for a tractor comprises a power output shell. Bolt holes are formed in the power output shell and the upper pull rod connecting seat, the opposite bolt holes of the power output shell and the upper pull rod connecting seat are connected through bolts, and a driving shaft bearing hole step is arranged in the middle of the power output shell; the upper pull rod connecting base comprises a main body plate, two supporting plates connected to the surface of the main body plate, two lower extending parts connected to one side of the main body plate and side extending parts connected to the two opposite faces of the main body plate, upper pull rod pin shaft holes are formed in the middles of the supporting plates, and reinforcing ribs are arranged at the corners, connected with the supporting plates, of the main body plate; the two lower extending parts are clamped on the two sides of the step of the driving shaft bearing hole. According to the split type power output shell connecting structure for the tractor, a split type structure is adopted, maintenance and replacement are convenient, meanwhile, the structural form of the power output shell and the structural form of the upper pull rod connecting base are improved, the strength after connection is improved, and stability is enhanced.