34results about How to "Small outer diameter" patented technology

The utility model provides a transmission box for a door lock, and relates to the field of door locks, the transmission box comprises a track box, a lock box and a gear, the lock box is arranged at one end of the track box, a transmission shaft is arranged on the lock box, clamp blocks are arranged at the upper end and the lower end of the transmission shaft, an outward protruding part is arranged at one end of the transmission shaft, and a transmission part is arranged in the lock box; a groove is formed in one side of the transmission part, the outer protruding part extends into the groove, a first tooth set is arranged on the rail box, a second tooth set is arranged on the other side of the transmission part, the gear is meshed with the first tooth set and the second tooth set, and locking points are arranged at the upper end and the lower end of the rail box. The transmission part and the gear are adopted for transmission, the outer diameter of the gear of the power shaft is reduced, the transmission gears capable of achieving the speed change function are arranged at the two ends of the gear, the defect that the transmission stroke of fan-shaped gear teeth is reduced when the base is universal is overcome, and the transmission device is simple in structure and reasonable and reliable in design.

Provided in the embodiments of the present application is a megawatt parallel pipe type charging pile cable, specifically: the cable comprises a sheath assembly, a main power line, cooling pipes and core wires; wherein the cooling pipes are at least 4 in number; the sheath assembly covers the main power line, the cooling pipes and the core wires; the cooling pipes are arranged in close contact with the sheath assembly, and the cable is centrally provided with the core wires; the cooling pipes are distributed at equal intervals; the main power line comprises positive power lines and negative power lines, and the positive power lines and the negative power lines are arranged in one-to-one correspondence and symmetry; the positive power lines and the corresponding negative power lines are arranged in close contact with different cooling pipes, respectively. The present application adopts a multi-core split design for the main power line comprising positive power lines and negative power lines, each independent core wire is closely attached to the outer wall of the cooling pipe, heat conduction is strengthened through direct contact, and heat is efficiently transferred vertically to the cooling liquid.

The invention relates to the technical field of medical instruments, in particular to a piezoelectric driving miniature optical probe for cerebrovascular interventional imaging, which comprises a glass tube base body, a single piezoelectric ceramic piece and the like, and is characterized in that the glass tube base body is of a hollow cylindrical structure, and an inclined groove is formed in the axial center of the glass tube base body; the single piezoelectric ceramic piece is fixed on the outer side of the glass tube base body. Through a hollow rod type stator structure composed of a single piezoelectric ceramic piece and a glass tube base body with a 10-degree inclined groove, mode conversion from longitudinal vibration to longitudinal-torsional coupling vibration is achieved, an elliptical motion track is formed at the position of a miniature magnetic ring at the front end of the stator, 360-degree optical scanning is achieved through friction driving of a rotor, and the mechanical property of the motor is improved. Compared with a traditional far-end miniature probe with the diameter usually larger than 1.5 mm, the whole outer diameter of the probe is reduced to 0.4 mm, and smooth navigation and passing in tortuous and narrow brain middle artery (the diameter is usually smaller than 0.5 mm) are easier.

The utility model discloses an energy storage system DC cable comprising a conductor, and the outer side of the conductor is sequentially wrapped by a composite isolation layer, an insulation layer, an anti-spraying layer, a ceramic protection layer, a metal fiber shielding layer and a sheath layer. The conductor is of a layered winding structure, and the winding pitch is 6-8 times of the twisting outer diameter of the conductor. The direct-current cable of the energy storage system has excellent bending performance and tensile performance, also has excellent electrical insulation performance, and can ensure stable insulation performance in both high-temperature and low-temperature environments; meanwhile, the cable is fireproof, waterproof, damp-heat-resistant and excellent in flame retardant property; moreover, the cable can resist electromagnetic interference, thereby guaranteeing the stability of signal transmission. In addition, the cable is small in outer diameter and light in weight, and can meet the requirements of light weight and flexibility of the cable.

The utility model discloses a shock wave balloon catheter which comprises a balloon, a shock wave generating part is arranged in the balloon, the shock wave generating part at least comprises two electrode assemblies, one end of the balloon is connected with an outer tube, an inner tube is arranged in the outer tube, the other end of the outer tube is connected with a catheter seat, and the outer side of the catheter seat is connected with a high-voltage pulse power supply. The shock wave generating part at least comprises two electrode assemblies, and the electrode assemblies are arranged on the inner pipe in a sleeving mode and are arranged at intervals; at least two discharge channels are arranged outside the inner tube, and all the discharge channels of all the electrode assemblies are not located on the same axial side of the inner tube. According to the shock wave balloon catheter, the electrode assembly is provided with the inner-layer electrode structure, the middle-layer electrode structure and the outer-layer electrode structure, the inner electrode is annular, the position of the discharge channel can be freely arranged, the discharge channel is arranged above the inner electrode, and the wire is located in the inner electrode, so that the wire cannot be damaged by arc discharge when shock waves are generated; and the service life of the inner shock wave conduit is greatly prolonged.

This invention provides a quick-connect balloon dilation catheter and a method for preparing the balloon dilation catheter. The quick-connect balloon dilation catheter includes a catheter seat, an outer tube connected to the catheter seat, and a balloon connected to the distal end of the outer tube. The outer tube has a metal tube body extending from the proximal end to the distal end, the metal tube body having a non-cutting segment at the proximal end and a cutting segment connected to the distal end of the non-cutting segment. The outer tube also has a polymer inner liner covering the inside of the cutting segment and a polymer sheath covering the outside of the cutting segment, such that the outer tube is integrally formed as a composite tube segment with a metal tube segment at the proximal end and a composite tube segment connected to the distal end of the metal tube segment, the composite tube segment having a quick-connect port penetrating both the inside and outside. This design improves the catheter's delivery and positioning accuracy.

The application provides a pressure reducing valve assembly, wherein a valve body comprises a limiting surface and a connecting part arranged in sequence along an axial direction, the connecting part is provided with a locking part movable along the axial direction; a variable diameter ring is located between the limiting surface and the connecting part, the variable diameter ring comprises a limiting part and a mounting part connected with each other, the limiting part is mounted on the connecting part, the mounting part comprises at least three variable diameter strips arranged in sequence along a circumferential direction of the connecting part, an outer diameter of any variable diameter strip gradually increases in a direction away from the locking part, a clamping strip for connecting with an external mounting part is connected, the clamping strip extends in a direction close to the limiting surface, and the mounting part has elasticity. When a mounting hole on a panel is smaller than a size of the mounting part of the pressure reducing valve, the pressure reducing valve assembly provided by the application extrudes the at least three variable diameter strips with elasticity to the inside to reduce the outer diameter of the mounting part, so that the mounting part of the pressure reducing valve is clamped in the mounting hole, and the effect that the pressure reducing valve is adapted to mounting holes with various sizes is achieved.

This utility model discloses a highly flexible, tensile-resistant shielded power cable, comprising a conductor layer, a fastening layer, an insulation layer, a shielding layer, and a sheath layer arranged coaxially from the inside out. The fastening layer is a heat-shrinkable braided tubing, which, after heat shrinking, forms a tight, compressed fit with the outer surface of the conductor layer, significantly improving the cable's tensile strength. The shielding layer is a heat-shrinkable tube with a metal wire braided mesh layer. Before heat shrinking, its original inner diameter D1 and the outer diameter D2 of the insulation layer satisfy 1.1 ≤ D1 / D2 ≤ 1.2; after heat shrinking, its final inner diameter D1' and D2 satisfy 1.02 ≤ D1' / D2 ≤ 1.08, ensuring a tight electromagnetic shielding contact between the shielding layer and the outer surface of the insulation layer. This utility model, through its unique interlayer heat-shrinkable fastening and shielding structure, achieves a balance between excellent flexibility, small diameter, high tensile strength, and stable shielding, making it particularly suitable for scenarios requiring frequent bending and small-area wiring, such as stage equipment and automotive wiring harnesses.

The invention discloses a strong magnetic screwdriver bit extension rod with a telescopic unlocking function and belongs to the technical field of electric tools. The strong magnetic screwdriver bit extension rod specifically comprises an extension rod sleeve, a magnet and an extension rod handle, a tool head sleeve used for being connected with a tool head is arranged at the front end of the extension rod sleeve, a sliding limiting sleeve is arranged at the rear end of the extension rod sleeve, and the magnet is arranged at the front end of the extension rod handle; a partition structure or / and a magnetic conduction structure is also arranged between the magnet and the bottom of the tool head sleeve; and the connecting rod sleeve and the sliding limiting sleeve can synchronously and axially slide relative to the connecting rod handle and the magnet. In the process of replacing the screwdriver head, the magnet can be driven to the position away from the screwdriver head in a sliding mode and is kept at the position through the positioning structure, and therefore an operator can easily complete insertion and extraction of the screwdriver head with one hand. The sliding limiting sleeve is located at the rear end of the extension rod sleeve, the diameter of the magnet in the extension rod sleeve can be made to be large as much as possible, the magnetic attraction capacity is improved, the outer diameter of the front section of the extension rod sleeve can be reduced, and use in a small space is facilitated.

The application discloses a wide-angle perception lens, which comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence along an optical axis from an object side to an image side, wherein the first lens has a negative refractive power, the second lens has a negative refractive power, the third lens has a positive refractive power, the fourth lens has a positive refractive power, the fifth lens has a positive refractive power, the sixth lens has a negative refractive power, and the seventh lens has a positive refractive power; and the second lens, the fourth lens and the seventh lens are all aspherical lenses. The wide-angle perception lens has the advantages of small outer diameter, short total length, high resolution (pixel can reach more than 8M), uniform picture quality of central and edge fields of view, large light transmission, good low-illumination effect, no defocus in a working temperature range of -40 DEG C to 105 DEG C, and no thermalization design.

The application discloses a mounting method and mounting device of cast iron sealing ring, and belongs to the technical field of cast iron sealing ring mounting. The method comprises the following steps: limiting the oil guide sleeve; the top of the oil guide sleeve shaft is provided with a guide device, the cast iron sealing ring moves along the inner circumferential surface of the guide device and enters the mounting position in the oil guide sleeve shaft; a force is applied to the cast iron sealing ring along the axial direction of the guide device to make the cast iron sealing ring move at a constant speed; the frictional force formed between the cast iron sealing ring and the guide device and between the cast iron sealing ring and the inner circumferential surface of the oil guide sleeve shaft is measured, and the moving distance of the cast iron sealing ring is measured; the distance from the top end of the guide device to the top end of the mounting position of the cast iron sealing ring in the oil guide sleeve is a set value, so that whether the cast iron sealing ring is mounted in place is confirmed. The application makes the cast iron sealing ring move at a constant speed along the axial line of the guide device and the inner hole of the oil guide sleeve to the mounting position under uniform force, effectively achieves mounting, improves the success rate, efficiency and quality of mounting, and realizes cost reduction and benefit increase.

The application relates to the technical field of oilfield logging, and discloses a split electrode connecting structure and a use method, which comprises a torpedo assembly, a horse collar assembly, an electrode wire, a first 15-core connecting plug assembly and a second 15-core connecting plug assembly; one end of the electrode wire is provided with a first connecting sleeve, and the other end is provided with a second connecting sleeve; the first connecting sleeve and the torpedo assembly are connected through the first 15-core connecting plug assembly; wherein one end of the first 15-core connecting plug assembly is arranged in the first connecting sleeve, and the other end is arranged in the torpedo assembly; the second connecting sleeve and the horse collar assembly are connected through the second 15-core connecting plug assembly; wherein one end of the second 15-core connecting plug assembly is arranged in the second connecting sleeve, and the other end is arranged in the horse collar assembly; the electrode horse collar and the cable horse collar can be converted only by inserting the 15-core connecting plug assembly, and the logging efficiency is effectively improved.

The application discloses a kind of image velocimetry system for blood vessel, the method for blood vessel pathological change risk assessment, blood vessel detection device-nanoparticle composition and its application, it is related to image processing field, the system includes: targeted visualization nanoparticle administration unit, double-ring scanning optical probe, CMOS imaging device, image acquisition and double-domain correlation processing module, coupling mechanics parameter calculation module.The application utilizes double-ring scanning optical probe to combine external CMOS imaging device, realizes the efficient transceiving and transmission of nanoparticle fluorescence signal;By performing digital image correlation and microscopic particle image velocimetry on image sequence, finally obtain the time synchronization data of blood vessel wall deformation, near-wall blood flow velocity and shear stress and other mechanical parameters, and based on this, the assessment and early warning of blood vessel pathological change risk are carried out.

The utility model relates to a kind of FID-SCD series detection device, belong to gas-liquid detection field.The device is fixed with hydrogen flame ionization detector and sulfur chemiluminescence detector on the same side by support, is connected by means of stopper and current limiter.The stopper is the "convex" cylinder, metal top plate is provided with central through-hole and air hole, FID nozzle is centrally installed;Current limiter uses the quartz or ceramic insulating tube with inner diameter ≤0.35mm, length 17.5cm±0.1, one end is connected SCD gas inlet, the other end passes through through-hole and FID nozzle maintains 9-10mm interval, outer surface is coated with polytetrafluoroethylene coating.Sample is separated after chromatographic column, FID completes hydrocarbon detection, sulfur combustion product passes through current limiter and enters SCD to realize sulfur content quantitative analysis.The utility model has the advantages that: carbon sulfur data can be obtained simultaneously by one sample, reduce interference, improve analysis efficiency, applicable to petrochemical, environmental monitoring and other fields.

The utility model relates to a cable, and specifically relates to a dynamic network Category 6 cable for a mechanical arm. The utility model aims to provide the dynamic network category 6 + cable for the mechanical arm, and the cable still has the advantages of low attenuation, high transmission rate and high-frequency support under the working condition of high-intensity movement, and has the characteristics of high flexibility, torsion resistance, tensile resistance and stable signal transmission. According to the technical scheme, the dynamic network Category 6 + cable for the mechanical arm is characterized by comprising a cable core, and an outer shielding layer, a belting layer and an outer protection layer which are sequentially coated outside the cable core from inside to outside, the cable core comprises a plurality of twisted pairs which are arranged in parallel along the length direction of the cable and are coated with inner shielding layers; the twisted pair wires adopt different twist pitches so as to reduce electromagnetic crosstalk between the twisted pair wires. The twisted pair wire comprises two twisted wires, and each wire comprises a conductor, and a first insulating layer, a second insulating layer and a third insulating layer which are sequentially coated on the conductor from inside to outside.

The invention relates to the technical field of wind power cables, in particular to an offshore wind power cable with a grid reinforcing layer and rated voltage of 155kv, which sequentially comprises a conductor, a semi-conductive nylon tape I, a conductor shield, an EPR insulator, an insulation shield, a semi-conductive nylon tape II, a tinned copper wire shield, a semi-conductive nylon tape III, an inner sheath and an outer sheath from inside to outside, and a grid reinforcing layer is arranged between the inner sheath and the outer sheath. According to the offshore wind power cable with the grid reinforcing layer and the rated voltage of 155kv, the grid reinforcing layer is of a customized terylene woven grid belt structure, after dipping treatment is conducted through special temperature-resistant glue, the performance is stable at the high temperature of 160-200 DEG C, the tensile strength is larger than or equal to 800N / 5cm, compared with an existing common terylene reinforcing belt, the high-temperature tensile strength is improved by 50% or above, and the rated voltage of 155kv is greatly improved. The problem that an existing reinforcing layer is poor in temperature resistance is effectively solved. Through plasma surface cleaning, gradient drying and shaping and precise glue material adaptation, the bonding strength of the grid reinforcing layer and the inner and outer sheaths is remarkably improved, and an integrated structure is formed between the layers.

A stator core, a birotor motor and a clothes dryer, the stator core comprises a plurality of outer stator wire slots and a plurality of inner stator wire slots, the outer stator wire slots and the inner stator wire slots are formed by separating a plurality of tooth parts uniformly distributed on yoke parts, and the extension directions of the tooth parts on the two yoke parts are opposite. The plurality of inner stator wire slots are used for accommodating stator windings to form an inner magnetic field, the plurality of outer stator wire slots are used for accommodating stator windings to form an outer magnetic field, and at least one yoke part is provided with a magnetic resistance structure used for inhibiting mutual interference between the inner magnetic field and the outer magnetic field. According to the utility model, on the premise of ensuring the output stability and efficiency of the double-rotor motor, the distance between the outer stator wire duct and the inner stator wire duct can be reduced, so that the outer diameter of the stator core is reduced, the size of the stator is reduced, and the size of the double-rotor motor is smaller; therefore, the double-rotor motor is suitable for a clothes dryer and other scenes with high volume requirements, and the equipment compactness is improved.

The application relates to the technical field of medical devices, in particular to a heart atrial shunt device which comprises a lead-through part and first and second positioning bodies arranged on the two sides of the lead-through part respectively, and the lead-through part, the first positioning body and the second positioning body are integrally woven by a single braided wire. In the embodiment of the application, the heart atrial shunt device is integrally woven by the single braided wire without needing to process bulk wire heads, after installation, no redundant structure protrudes into the left and right atria, blood clots are not easy to form, the structure is simple, the size is smaller during contraction, and the damage to the access blood vessels during implantation is smaller.

The invention belongs to the technical field of cable manufacturing, and particularly relates to an airport extrusion-resistant super-flexible electric reel phase-change connection cable and a manufacturing method thereof, and the cable comprises a power wire core and a control wire core; a metal conductor of the power wire core is formed by re-stranding divided unit conductors by adopting a 0 + 5 structure, the center of the metal conductor is filled with an aramid rope, the edge gap is filled with aramid yarn, and an insulating material is extruded outside the metal conductor; each segmentation unit conductor is formed by stranding strands in a 1 + 6 structure and wrapping the strands with a polytetrafluoroethylene tape. The control wire core comprises a cable core, the cable core is formed by twisting control wire groups by adopting a 0 + 6 structure, the center of the cable core is filled with an aramid rope, an edge gap is filled with aramid yarn, and a sheath is extruded outside the cable core; the control wire group is formed by twisting insulating wire core pre-cabling, and polyester ropes are filled in side gaps; each insulating wire core comprises a conductor, and an insulating material is extruded outside the conductor. According to the cable, a conductor grouping and twisting mode is adopted, and meanwhile the tensile force and the torsion resistance of the conductors are improved by adopting a torsion-resistant structure and a material assembly.

This invention discloses an easy-stripping fiber optic bundle coating material, fiber optic bundle, and preparation method, relating to the field of fiber optic manufacturing technology. It is particularly suitable for manufacturing fiber optic bundles with small-size, ultra-high-density applications and rapid stripping capabilities using acrylic resin through a UV curing process, effectively shortening construction time and improving optical cable construction efficiency. In this invention, the acrylic sheath structure of the fiber optic bundle can be rapidly stripped by extrusion rupture, eliminating the need for complex specialized tools. The operation is simple and quick, and the sheath formed by UV curing of acrylic resin has a thickness of only 50-100 μm, a very thin wall, significantly improving space utilization.

The utility model discloses an elastic positioning pin which comprises a pin body, a first baffle is fixedly connected to the outer side, close to the top, of the pin body, and a second baffle is fixedly connected to the top end of the pin body. When the pin body needs to be inserted or pulled out, the wrench drives the hexagonal head to rotate, the hexagonal head drives the lead screw to rotate, the lead screw drives the sliding blocks on the two sides to get close to each other, then the clamping plates on the two sides are driven to get close to each other, the pin body is extruded, the pin body is compressed through the notches, and the outer diameter of the pin body is reduced to be smaller than the inner diameter of the pin groove; the positioning pin structure can be easily inserted into or moved out of a pin groove of a connecting piece, after insertion, the screw rod is reversely rotated, the elasticity of the pin body can be released, the outer wall of the pin body is tightly attached to the inner wall of the pin groove of the connecting piece, external vibration and impact force can be absorbed through the elastic material of the pin body, and abrasion to connecting parts is reduced; and the outer diameter of the pin body is reduced, so that the pin body is convenient to disassemble and assemble and is prevented from being damaged during disassembly and assembly.

The utility model relates to medical instrument technical field especially a ventricular peritoneal shunt pass bar. The utility model discloses pass bar subassembly, handle, guide piece and shunt tube fixed subassembly, pass bar subassembly includes the pass bar body of being placed in the patient's skin and the installation sleeve of being fixed in the pass bar body front end end portion, shunt tube fixed subassembly includes the installation post of being detachably installed in the inside of installation sleeve, the disc that is fixed in the installation post front end end face and with installation sleeve front end end face abuts and the plug rod of rotating being arranged in the disc front disc surface middle part and being inserted in the shunt tube spout, the guide piece detachably sets up in the installation sleeve outside, the handle is fixed in the pass bar body rear end. The device can reduce the external diameter of pass bar subassembly whole under the condition of keeping the shunt tube diameter invariable to reduce the injury to the child when puncturing.

This application relates to a ventricular assist device (VAD), which includes a pump body and a motor. The pump body includes a pump housing and an outlet tube, with the outlet tube disposed on the outer peripheral surface of the pump housing and extending outward from the outer peripheral surface. The motor and pump body are arranged along the axial direction of the VAD. The motor includes a housing and a cable outlet assembly. The housing is connected to the pump housing, and the cable outlet assembly is disposed on the housing. The cable outlet assembly extends from the housing along the outer peripheral surface of the housing in a bent direction away from the outlet tube. This allows the cable outlet assembly to protrude radially with a smaller height relative to the outer peripheral surface of the housing, thereby reducing the outer diameter and volume of the VAD. This improves the ease of implantation and wearing comfort of the VAD, and also prevents the swaying of the cable within the cable outlet assembly from interfering with the artificial blood vessel connected to the outlet tube, thus achieving stable blood pumping by the VAD.

The utility model relates to a kind of double-motor driving device for golf bag car.The double-motor driving device for golf bag car includes drive motor, reduction assembly and shell, the shell includes the main part fixed with drive motor and the extension part located at the both sides of main part, the reduction assembly includes worm gear structure and worm structure in main part, the worm structure is located at drive motor output end, the both ends of worm gear structure are provided with first shaft part and second shaft part respectively, the first shaft part and second shaft part are rotatably fixed with shell by first bearing, the extension part in both sides is rotatably fixed with a linkage shaft by two second bearings respectively, the end of first shaft part extends into extension part and is linked with the inner end of output end by coupling, one second bearing is located at the outer end of extension part, and the other second bearing is adjacent to the coupling.The utility model has the advantages of lower production requirements, easy assembly and higher stability during use.

The utility model discloses a sealing bottle cap and a packaging bottle, the sealing bottle cap comprises a cap body, the bottom side of the cap body is provided with a lower opening, and the inner side of the cap body is provided with an inner connecting structure; the sealing plug comprises a connecting section, a deformation section, an outer supporting section and a plugging section which are coaxially connected in sequence from inside to outside, the connecting section is connected to the inner top side of the cover body, and the plugging section is located at the top of the outer supporting section; the deformation section can drive the plugging section to leave the inner top side of the cover body in a natural state and enable the outer diameter of the outer supporting section to be reduced, and when the plugging section moves upwards, the deformation section can be driven to elastically deform and enable the outer diameter of the outer supporting section to be increased. The outer diameter of the outer supporting section can be increased to ensure the sealing performance with the bottle opening, and the outer diameter of the outer supporting section can be reduced to reduce the friction force when the outer supporting section is separated from the bottle opening, so that the operation is more labor-saving, and the sealing performance and the operation convenience when the sealing bottle cap is used are better considered.

This invention relates to an array ultrasonic testing probe and its testing method for small-diameter hollow shafts. It is used for non-destructive testing of internal channel defects in objects such as small-diameter hollow shafts (inner diameter ≤ 30mm) (e.g., hollow railway axles, hollow aircraft axles, etc.). The testing probe extends into the internal channel (11) of the object being tested (1) for inspection. The testing probe includes a probe base, an acoustic matching device, and a composite cable. The probe base is configured as a cylindrical structure adapted to the hollow inner diameter of the object being tested. This invention incorporates an acoustic matching device with an elastic capsule structure. The pressure of the coupling agent within the elastic capsule is adjusted by a coupling agent supply device to regulate the probe's outer diameter.

The utility model relates to cable structure technical field discloses compact liquid cooling charging cable for civil airport, including signal line core, control line core, yellow green ground wire, outer sheath and two main line cores, and main line core, signal line core, control line core and yellow green ground wire all are located in the outer sheath, and yellow green ground wire is located the center of outer sheath, and signal line core and control line core are twisted around yellow green ground wire, and the outside of signal line core and control line core has a layer of sheath, and the outside of a layer of sheath has two layers of sheath, and the gap between a layer of sheath and two layers of sheath forms cooling cavity, and cooling cavity is filled with coolant, and two main line cores are arranged between two layers of sheath and outer sheath. Through the utility model, the problem that the existing cable structure is complex, the outer diameter is large, and the weight is also heavy, and is inconvenient for actual use can be solved.

The invention relates to a full-automatic metal pipe bending machine, and belongs to the technical field of pipe bending equipment. The pipe bending machine comprises a machine frame, a core rod assembly and a pipe bending module, the core rod assembly and the pipe bending module are installed on the machine frame, the core rod assembly comprises a core shaft and a ball head module connected to the end of the core shaft, the pipe bending module comprises a bending die, the ball head module comprises a plurality of ball head units arranged around the central axis of the core shaft, and the ball head units are all installed on the core shaft in a sliding mode. The multiple ball head units can be gathered inwards to reduce the outer diameter size of the ball head module, the multiple ball head units can further expand outwards to increase the outer diameter size of the ball head module so that the ball head module can be tightly supported on the inner wall of the metal pipe, and the ball head module tightly supported on the inner wall of the metal pipe can tightly press the metal pipe on the bending die. The ball head module can firmly support the inner wall of the metal pipe, and the problem that the metal pipe is squashed or wrinkled in the bending process is avoided.

The utility model provides a dual-motor-based middle motor and an electric vehicle. The dual-motor-based middle motor comprises a first motor, a second motor, a first speed reduction assembly, a second speed reduction assembly and a planetary speed change assembly, the first speed reduction assembly comprises a first gear, a second gear, a third gear, an output gear and a motor clutch. The first gear is meshed with the output end of the first motor, the first gear is coaxially connected with the second gear, the second gear is meshed with the third gear, and the third gear is meshed with the output gear; the motor clutch is connected to the periphery of an output shaft of the planetary speed change assembly. Wherein the third gear is an idle gear, and the motor clutch can be engaged with / disengaged from the output gear. The torque can be increased, the size of the motor is obviously reduced, and the weight of the motor is reduced. And the third gear adopts an idle gear form, so that the outer diameter of the output gear can be reduced, and the size of the whole motor is further reduced.

The utility model provides a speed reduction motor and a range hood comprising the same, the speed reduction motor comprises a motor assembly, the motor assembly comprises a motor shaft, the second end of the motor shaft is provided with a motor bearing; the gear box assembly is connected with the motor assembly in the axial direction of the motor shaft, the first end of the motor shaft extends into the gear box assembly, and the gear box assembly comprises an output shaft and an output bearing supporting the output shaft. An inserting hole is formed in the end portion, facing the first end of the motor shaft, of the output shaft, the first end of the motor shaft is connected with the output shaft in an inserting mode, and the first end of the motor shaft and the output shaft share the same output bearing. The internal axial space of the gear motor is reasonably utilized, the axial size of the gear motor can be correspondingly reduced, and on the basis that the gear box assembly and the motor assembly are axially connected to save the radial space, the outer diameter of the motor is reduced to reduce the resistance to airflow in an air duct.