34results about How to "Save crafting materials" patented technology

The stainless steel evaporator of the snow melting machine comprises an outer barrel, the outer barrel is filled with a refrigerating medium, and liquid is sprayed to the outer surface of the outer barrel, condensed and then scraped by a scraper; the inner barrel is a cylindrical shell which is provided with two open ends and is coaxial with the outer barrel, the first end of the inner barrel is connected with the end part of the outer barrel, and the second end of the inner barrel is outwards provided with a folded edge, so that a closed refrigeration cavity is formed between the inner barrel and the outer barrel; a notch is formed in the folded edge, a liquid inlet groove communicated with the notch is formed in the refrigerating cavity, and a refrigerating medium enters the refrigerating cavity through the liquid inlet groove. And the liquid inlet pipe extends into the liquid inlet groove through the notch. An original line contact conduction mode is changed into a surface contact conduction mode, the problems of poor contact and low conduction efficiency between the coil pipe and the outer barrel are effectively solved, a refrigerating medium rapidly absorbs heat of the outer barrel, and therefore the condensation effect is accelerated, and the refrigerating efficiency is improved.

The utility model discloses a three-phase three-layer multi-rotor motor structure and a wheel hub motor, the motor structure comprises three single-phase multi-rotor motor sets which are installed along the axial direction of a main shaft, each single-phase multi-rotor motor set is a 360-degree closed ring structure composed of a plurality of small motors, inner rotors and stators of the motor sets are alternately arranged, and two sides of each stator are provided with semicircular magnetic poles by taking a winding groove as a center. The permanent magnet rotor is coupled with stator semicircular magnetic poles on two adjacent sides to form a small motor; the rotors of the three motor sets are arranged in a one-to-one correspondence mode in the axial direction of the motors and coaxially connected in series through rotor through shafts, and the magnetic field directions of the rotors are sequentially staggered by 120 degrees. And the main shaft fluted disc is fixed on the main shaft, is used as a timing gear to be meshed with the pinions arranged on the rotor through shafts so as to drive the three motor groups to continuously operate, and is also used as a thrust gear to output motor torque. The hub motor provided by the utility model has the advantages of higher rotating speed, higher efficiency, smaller volume and lighter weight.

The utility model belongs to the technical field of liquefied natural gas storage equipment, and discloses an LNG storage tank supporting frame which comprises a base and an LNG storage tank body, the LNG storage tank body is arranged in a groove of the base, the top end of the base is fixedly connected with a fixing block, a sliding rod is slidably connected in a sliding groove of the fixing block, an abutting ring is fixedly arranged on the outer side of the sliding rod in a sleeved mode, and the abutting ring is fixedly connected with the LNG storage tank body. A first spring is arranged on the left side of the abutting ring in an abutting mode, a sliding ring is arranged at the other end of the first spring in an abutting mode, the sliding ring slides on the outer side of the sliding rod, a connecting disc is fixedly connected to the left side of the sliding rod, a shock pad is arranged on the left side of the connecting disc in an abutting mode, and the outer side of the LNG storage tank body is attached to the interior of the shock pad. The problems that an LNG storage tank body is poor in stability, potential safety hazards exist, due to the lack of a fixing mechanism, the LNG storage tank body is prone to inclining and being damaged, fuel leakage is further caused, and finally the serious consequence that the environment is polluted is caused are solved, and even serious safety accidents are possibly caused are solved.

The invention discloses a rare-earth-free permanent magnet synchronous motor structure and a design method, the rare-earth-free permanent magnet synchronous motor structure comprises a motor body and a rotor body arranged in the motor body, the rotor body is provided with a plurality of V-shaped magnetic steel grooves and a plurality of I-shaped magnetic steel grooves, and detachable magnetic steel is installed in the V-shaped magnetic steel grooves and the I-shaped magnetic steel grooves; the magnetic steel, the motor body and the rotor body are made of materials without rare earth metal, fluctuation of magnetic groove torque and load torque of the motor is reduced by designing the V-shaped grooves and adjusting inclination and length of the V-shaped grooves, power density is effectively improved, harmonic waves and NVH (noise vibration and harshness) of the motor are inhibited synchronously through the design methods, and the service life of the motor is prolonged. The motor has good efficiency, torque fluctuation and NVH performance under the full-rotation-speed working conditions of different permanent magnet structures, the rare-earth-free motor does not contain rare earth metal, and the manufacturing cost is greatly reduced.

The utility model discloses a supporting plate storage device, and relates to the technical field of storage, the supporting plate storage device comprises a sleeving structure, the sleeving structure comprises a front face, a common face and a back face, the common face is located between the front face and the back face, and the two opposite sides of the front face, the common face and the back face in the horizontal direction are arranged in an aligned mode and form closed sides; the back surface and the upper end edge side of the common surface are connected together to form a sleeving cavity with one side of an opening structure, the front surface and the bottom end edge side of the common surface are connected together to form a storage cavity I with one side of an opening structure, and the storage cavity I and the sleeving cavity are arranged oppositely in opening direction; and the expansion storage structure is detachably connected with the bottom end of the back surface. The front face, the common face and the back face are adopted to form the two cavities, manufacturing materials are saved, the back face and the common face form the sleeving cavity with one side of an opening structure in the using process, the supporting plate is sleeved with the sleeving cavity, and when the supporting plate is in the erected and horizontal state, the first storage cavity and the second storage cavity serve as storage places to be used; and the sleeving structure can be used independently after being detached.

The utility model relates to a solar cell. The solar cell includes: a substrate; the grid lines are fixedly arranged on the substrate; and a plurality of attachment blocks, the plurality of attachment blocks are fixedly arranged on two sides of the grid line in a staggered manner along the length direction of the grid line, and the plurality of attachment blocks are fixedly arranged on the substrate. The adhesion blocks arranged on the two sides of the grid line of the solar cell in a staggered manner can enhance the fixing strength of the grid line on the substrate, so that the grid line is not easy to fall off from the substrate, the conductivity of the grid line is improved, and the photoelectric conversion efficiency of the solar cell is improved.

The present application relates to a kind of personalized orthodontic bite gum, the bite gum is used to cooperate with the use of invisible aligner, the bite gum is horseshoe structure in horizontal plane view, it is wedge structure of back thin front thick in sagittal plane view;The bite gum includes bite gum pad, buccal side, lingual side, the buccal side and the lingual side extend to dental arch buccal side and lingual side from the bite gum pad;The bite gum is provided with the avoidance of corresponding arrangement with the invisible aligner, the avoidance is used to avoid weak position on the invisible aligner.The bite gum provided by the present application is mainly aimed at the cases of tooth extraction, tooth defect, replacement tooth period, tooth occlusal surface design, etc.Special device case, by setting avoidance, the bite gum can avoid weak position on the invisible aligner, prevent the deformation of aligner due to the use of bite gum, affect the treatment effect, reduce the use requirement to patient, improve the use efficiency of bite gum, save time.

The present invention discloses a new type of steel back that can be used for commercial vehicle brake pads, and relates to a steel back used for automotive disc brakes and a manufacturing method thereof, and in particular to a steel back used for commercial vehicle disc brakes and a manufacturing method thereof. It comprises a steel back substrate, which is made of steel of various materials suitable for forging through a forging process; there is a shallow depression area on the front of the steel back substrate, and raised forged reinforcement ribs are distributed in the shallow depression area to divide the shallow depression area into several fixed loading areas, and in each fixed loading area, there are pieces of forged nails starting from the steel back substrate. The new type of steel back of the technical solution of the present invention is not only high in strength and can withstand greater impact loads, but also can be lightweight, save manufacturing materials, and reduce production costs.

The utility model discloses a steel profile with a reinforcing structure, which comprises a steel profile body, the cross section of the steel profile body is of a U-shaped structure, a plurality of reinforcing blocks are fixedly connected in the steel profile body at equal intervals along the length direction, a cavity is arranged in the steel profile body, the cross section of the cavity is also of a U-shaped structure, and the reinforcing blocks are fixedly connected in the steel profile body at equal intervals. A cavity is formed in the steel section bar body, a fixing reinforcing structure is arranged in the cavity, a first thickening block and a second thickening block are arranged on the inner walls of the two ends of the steel section bar body respectively, and alignment connecting structures are arranged on the first thickening block and the second thickening block. The problem of position deviation during connection of the steel profiles can be effectively avoided, the stability of preliminary connection of the two steel profiles is improved, preliminary connection of the steel profiles is facilitated, the thickness of the connecting position of the steel profiles is increased through the first thickening block and the second thickening block, and the bearing capacity and stability of the connecting position of the steel profiles are effectively improved.

The magnetomotive force strengthening device comprises fixing frames, an output shaft, a rotor, an outer stator, a bearing, a machine shell and a machine cover, the machine cover is installed at one end of the machine shell, at least one fixing frame is fixed in the machine shell, the two ends of the output shaft penetrate through the fixing frames and the machine cover, the bearing is installed between the output shaft and the fixing frames, the rotor is installed in the machine shell and fixed to the output shaft, and the outer stator is installed on the machine cover. A plurality of outer stator magnetic units and a plurality of rotor magnetic units are respectively and uniformly embedded on the opposite circumferential surfaces of the outer stator and the rotor, the support is sleeved on the output shaft, the lower end of the support is fixed on the fixing frame through a screw, the inner stator is fixed on the outer circumference of the support through a positioning key, and the inner stator is fixed on the outer circumference of the support through a screw. An inner stator magnetic unit is embedded on the outer circumference of the inner stator, the inner stator magnetic unit is opposite to the rotor magnetic unit, a circular ring is arranged on the outer circumference of the rotor, a plurality of rotor magnetic units are uniformly embedded on the circumference of the circular ring, the outer side of each rotor magnetic unit is opposite to the outer stator magnetic unit, and the inner side of each rotor magnetic unit is opposite to the inner stator magnetic unit.

The present invention relates to a plug, a liquid cooling plate, and a battery box. An L-shaped channel is provided in the plug. The L-shaped channel includes a horizontal channel and a vertical channel. The horizontal channel extends forward from the corner of the L-shaped channel to pass through the front end face of the plug, and an interface is provided on the front end face of the plug. The vertical channel extends downward from the corner. An opening structure is provided on the lower surface of the plug, and the opening structure has a downward lower opening. The lower end of the vertical channel is integrally connected with the opening structure to form an open hole. One side of the opening structure is connected with the liquid distribution cavity. The vertical channel is connected with the liquid distribution cavity through the opening structure. The plug includes a cover plate for sealing the lower opening of the opening structure. By providing the L-shaped channel, the coolant can enter or flow out of the liquid cooling plate in the front-to-back direction. The vertical channel at the position where the coolant changes the flow direction is directly provided in the plug, which has better strength and no welding connection, thus avoiding the problem of welding penetration and the problem that the welding connection is easily damaged.

The utility model relates to the technical field of mechanical structures, in particular to a supporting device which comprises a supporting part and a passing part. The supporting part is connected with a first target section and is configured to bear target equipment above the ground surface of the first target section; one end of the passing part is connected with the supporting part, the other end of the passing part is connected with the second target section, and the passing part is configured to allow the movable target to pass between the target equipment and the second target section. According to the supporting device, the pre-manufactured semi-finished product or finished product is directly connected to the ground, and the problem that the construction period is long due to the fact that a foundation pit is dug and reinforced concrete is filled in the mode generally adopted at present is solved to a certain extent. Particularly in alpine regions and / or winter, the construction period of the supporting device is shortened due to the fact that the setting time of the concrete is longer.

An aircraft engine electric oil pump center plunger rod anti-disengaging clamping ring disassembling and assembling tool comprises a base, a cylinder body connecting lug and a pair of guide rods are arranged on the base, a lifting frame is arranged on the guide rods in a sliding and sleeving mode, a disassembling and assembling mechanism is arranged in the center of the lifting frame in a hanging mode, and the disassembling and assembling mechanism is located over the cylinder body connecting lug. The center plunger rod is sleeved with the disassembling and assembling mechanism, and the disassembling and assembling mechanism is in threaded connection with the center plunger rod. The disassembling and assembling mechanism comprises a lifting cylinder, the lower end of the lifting cylinder extends into the engine electric oil pump, the center plunger rod is sleeved with the lifting cylinder, and the lifting cylinder is installed on the lifting frame in a suspended mode and synchronously ascends and descends along with the lifting frame. A cutter mounting base is arranged at the lower end of the lifting cylinder, and a cutter assembly is detachably mounted on the cutter mounting base. The top face of the lifting cylinder is connected with a driving nut (54), and the driving nut (54) is in threaded connection with threads on the center plunger rod. According to the tool, the anti-disengaging clamping ring of the center plunger rod of the electric oil pump of the engine can be rapidly disassembled and assembled, positioning is accurate, operation is easy, disassembling and assembling precision is high, and efficiency is high.

The present invention discloses an X-ray shielding assembly and a front collimator thereof. The shielding assembly includes a pair of tungsten plates, a gap for X-rays to pass through is formed between the tungsten plates, the gap has a first plane area of ​​preset length surrounded by a hyperbola, the first plane area is used to trim the drum-shaped part of the X-ray projection projected onto the detector into a straight line; the two ends of the first plane area have a second plane area surrounded by a double straight line, the second plane area is used to trim the straight part of the X-ray projection projected onto the detector into a drum shape, so as to realize the auxiliary detector detection and control of the limit width of the X-ray projection after the beam is limited. Therefore, the shielding assembly can not only make the X-ray projection projected onto the detector rectangular, but also realize the auxiliary detector detection and control of the limit width of the X-ray projection after the beam is limited, so as to avoid the patient from bearing additional doses.

The utility model relates to a quick clamping fixture which comprises a base plate, ten fixture frames are arranged on the base plate, every two fixture frames are oppositely installed, each fixture frame comprises a supporting column, a locking fixing block, a locking pull claw and a clamping position, a sinking groove is formed in each supporting column, two screw holes are formed in each sinking groove, a screw hole is formed in the middle of each locking fixing block, and the locking pull claws are arranged on the locking fixing blocks. The clamping position is arranged at the top end of the supporting column, two counter bores are formed in the two sides of the clamping position, the locking fixing block is connected with the supporting column through a fixing block screw, a protruding cutting edge part at the upper end of the locking pull claw presses the clamping position at the top end of the supporting column, a screw hole is formed in the lower end of the locking pull claw, and the locking pull claw is connected with the locking fixing block through a pull claw screw. The utility model provides a rapid and reliable clamping scheme, and non-standard products and special-shaped products can be rapidly clamped. The clamp is few in manufacturing material, simple in structure and easy to manufacture; clamping is simple, and leveling is convenient; and the deformation of the workpiece caused by the clamping of the tool is small.

The utility model discloses a novel steel wood structure folding chair which comprises two support assemblies, each support assembly comprises a front supporting rod, an inclined supporting rod and a rear supporting rod, the top of each inclined supporting rod is rotatably connected with the top of the corresponding rear supporting rod, and the bottom of each inclined supporting rod is rotatably connected with the bottom of the corresponding front supporting rod. A first transverse rod is arranged between the inner walls of the tops of the two rear supporting rods, a rotatable seat plate is arranged on the first transverse rod, a second transverse rod is arranged between the outer walls of the tops of the two front supporting rods, the second transverse rod is fixedly connected with the front supporting rods, a third transverse rod is arranged between the inner walls of the bottoms of the two rear supporting rods, and the second transverse rod is fixedly connected with the front supporting rods. The third cross rod is fixedly connected with the rear supporting rod, pull ropes are symmetrically arranged on the two sides of the second cross rod, and the bottom ends of the pull ropes are connected with the third cross rod. The folding chair is convenient to fold, simple in overall structure, good in stability and practical.

The utility model discloses a one-way single-layer multi-rotor motor structure and a hub motor. The motor structure comprises a single-phase multi-rotor motor set which is installed in a circumferential closed loop mode with a main shaft of the motor as the center and a main shaft fluted disc which is fixed to the main shaft and used for outputting motor torque. Rotors and stators in the single-phase multi-rotor motor set are alternately arranged, semicircular magnetic poles are arranged on the two sides of each stator with a winding groove as the center, and a permanent magnet rotor is coupled with the semicircular magnetic poles of the stators on the two adjacent sides to form a single-phase small motor. The main shaft fluted disc serves as a timing gear to be meshed with the pinions arranged on the rotor shafts so as to drive the rotors of the single-phase small motors to operate continuously, and meanwhile serves as a thrust gear to output motor torque. The motor structure has the advantages of higher rotating speed, higher working efficiency, small volume, light weight and simple structure, and particularly, the magnetic pole magnetic circuit of a single rotor is short, the magnetic resistance is small, and the magnetic heat loss is lower. The hub motor provided by the utility model has the advantages of higher rotating speed, higher efficiency, smaller volume and lighter weight.

The utility model relates to the technical field of fused salt electric heaters, and provides a fused salt electric heater which comprises a heating tube bundle, a wiring bin, a flange plate and a cooling bin. The upper end of the heating tube bundle is fixedly connected with the wiring bin; the wiring bin is used for connecting an external power line or control line with the heating tube bundle; the flange plate is provided with penetrating holes corresponding to pipe bodies in the heating pipe bundle, the pipe bodies in the heating pipe bundle penetrate through the flange plate and are fixedly connected with the flange plate, and the flange plate is used for fixing the fused salt electric heater to the top of a fused salt tank. The cooling bin is arranged between the wiring bin and the flange plate, pipe bodies in the heating pipe bundle penetrate through the cooling bin, the cooling bin is provided with a water inlet and a water outlet, and the cooling bin is used for cooling the part, exposed out of the molten salt tank, of the heating pipe bundle. Through the arrangement of the cooling bin, on one hand, the exposed part of the heating tube bundle is cooled, the risk of overheating damage of the wiring bin is further reduced, and on the other hand, heat lost from the exposed part of the heating tube bundle can be utilized.

The present invention discloses a liquid-cooled battery box and a battery pack. The liquid-cooled battery box includes a box, the box includes a first box and a second box, one end of the first box is connected to one end of the second box, the first box has a first receiving slot with an opening at one end, the first receiving slot is used to receive a battery management system, the second box has a second receiving slot with an opening at one end, the second receiving slot is used to receive a battery module, the notch of the first receiving slot and the notch of the second receiving slot face oppositely, the bottom of the first receiving slot and the bottom of the second receiving slot are both provided with a cooling liquid flow channel, the cooling liquid flow channel of the first box and the cooling liquid flow channel of the second box are in communication, and the cooling liquid flow channel is used to circulate cooling liquid. It optimizes the internal space of the box and has high safety.

The utility model provides a sleeper steel mould positioning system and a steel mould containing the positioning system.The sleeper steel mould positioning system comprises a positioning support, the positioning support is located on the outer side of a mould shell and is fixedly connected with a bottom plate of the mould shell, a long round hole is formed in the bottom face of the positioning support, and the positioning support is fixedly connected with the bottom plate of the mould shell. A through hole penetrating through a bottom plate is formed in the position, corresponding to the long round hole, of the bottom plate of the formwork, and the end, away from the anchoring part, of the spike bolt sequentially penetrates through the through hole and the long round hole, extends out of the support and is locked through a locking nut. The sleeper steel mold positioning system can be installed on an original steel mold to be used in the production of manufacturing a concrete sleeper through a spike first anchoring method, so that manual anchoring is replaced, the anchoring efficiency of spikes is greatly improved, a new steel mold does not need to be manufactured, steel mold manufacturing materials are saved, steel mold manufacturing cost is saved, and practicability is high.

The invention discloses a stator, a motor and a generator, belongs to the technical field of motors and generators, and is used for improving the working efficiency of the motor and the generator. According to the invention, the plurality of shells are arranged, each shell is provided with the installation through hole, each installation through hole is internally provided with the conductive module, and the plurality of shells and the conductive modules are spliced to form the stator, so that the manufacturing cost of the motor and the generator is reduced while the punching sheet leftover materials are saved, that is, the stator and the conductive modules are combined at the same time, and the production efficiency is improved. And the step of installing the insulated conductor after the stator is spliced is omitted.

The utility model provides an air suspension air supply unit, which relates to the technical field of air bag air supply devices, and comprises an air supply unit for supplying air or deflating air to an air bag, an ECAS controller for sending a lifting instruction, a power battery for providing a power supply, a power supply controller and an air compressor controller, one end of the air compressor controller is electrically connected with the power battery through the power supply controller, the other end of the air compressor controller is electrically connected with the air supply unit, the air compressor controller is in signal connection with the ECAS controller, and the air compressor controller receives a lifting instruction of the ECAS controller and controls the power battery to provide a high-power power source for the air supply unit. And the air supply unit directly supplies air or deflates air to the air bag. The power supply power of the air supply unit can be improved through the power battery, the air inlet amount and the air outlet amount are increased, the speed is improved, and meanwhile an air storage barrel is omitted.

This invention provides a copper ring sensing device. The copper ring sensing device includes a PI substrate and copper wires wound onto the surface of the PI substrate. An insulating layer is provided on the surface of the copper wires, and a rubber tube is fitted over the copper wires. The wire width is 0.2 mm. A PI protective film covers the copper wires and is adhered to the PI substrate. The copper ring sensing device provided by this invention solves the technical problems of complex manufacturing processes, long production cycles, and material waste in the production of traditional flexible printed circuit boards, which lead to high costs.

The utility model discloses a connector, an electric control device and heating and ventilation equipment, the connector comprises an insulating seat and a power connection column, the insulating seat is arranged in a shell, the power connection column is arranged in the insulating seat, the power connection column is provided with two power connection end parts connected with each other, the tail end of each power connection end part is provided with a power connection convex part, and the power connection convex part is arranged in the shell. Each power connection protruding part protrudes out of the peripheral side of the power connection column in the radial direction of the power connection column, and the two power connection protruding parts are connected between the first circuit module and the second circuit module so that the first circuit module and the second circuit module can be electrically connected. Thus, compared with an electric control device in the related technology, the insulating seat and the power connection column of the connector can be installed in the shell in advance, the connecting position in the connector is limited through the insulating seat, an operator only needs to make the first circuit module and the second circuit module be in butt joint with the two power connection protruding parts, and then the wiring process can be completed; therefore, the wiring difficulty of the electric control device of the heating and ventilation equipment is reduced, and the error rate is low.

The application discloses a graphene modified copper-based flexible electronic ink material and a preparation method thereof, and belongs to the field of nanomaterials. The method is characterized in that: graphene is modified on nano copper powder, the graphene modified copper powder is mixed with terpineol, centrifuged to prepare graphene-spherical copper powder particles, and then the graphene modified copper-based flexible electronic ink material is prepared by mixing the graphene-spherical copper powder particles with an adhesive, a solvent and a diluent through a specific dispersion technique. The graphene modified copper-based flexible electronic printing ink prepared by the method has greatly improved conductive and heat conductive performance, and even exceeds ordinary silver-based electronic printing ink. The graphene modified copper-based flexible electronic printing ink greatly reduces pollution generated during preparation of traditional PCB and FPC circuit films, and suppresses oxidation of a conductor surface in a circuit. The graphene modified copper-based flexible electronic printing ink saves a large amount of metal conductive materials and other preparation materials, and is suitable for large-scale production due to simple production equipment, short production period and simple process.

This utility model discloses a green and low-carbon dual-mode measurement unit calibration device, relating to the field of power metering equipment calibration technology. By setting up a device body with multiple calibration stations, this utility model provides a physical basis for batch parallel calibration of measurement units, improving space utilization. Multiple sets of current transformers enable centralized supply and independent distribution of calibration signal sources, replacing the existing whole-machine measurement method. Centralized communication management by the communication control unit enables parallel acquisition and processing of calibration data, thus constructing an independent and dedicated batch calibration platform. This eliminates the reliance on the entire measurement switch as a calibration carrier, greatly simplifying the operation process and significantly improving calibration efficiency.

The utility model relates to the technical field of display stands, and discloses a telescopic display stand which comprises a supporting seat, a base is arranged at the top end of the supporting seat, a supporting column is arranged in the base, a bearing plate is fixedly installed at the end, away from the base, of the supporting column, and a display stand body is arranged on the bearing plate. An inclined plane is formed in the outer surface of the base, inserting holes are formed in the end face of the inclined plane and are distributed in a curve linear array mode, inner cavities of the inserting holes are movably connected with the outer surface of the supporting column in an inserted mode, and the diameter and the size of the inner cavities of the inserting holes are matched with the diameter and the size of the outer surface of the supporting column; a display cavity is formed in the base, the bottom wall of an inner cavity of the display cavity forms a bottom end face, the bottom end face is in a step shape, the bearing plate is in an n shape, and the display table comprises a triangular block. The telescopic display stand not only has a telescopic function, but also can better display articles.

The utility model relates to a generator, in particular to a generator for an automobile. The utility model provides an automobile generator capable of reducing material consumption of an end cover, which comprises a motor, the motor consists of a front end cover, a rear end cover and a stator, the stator comprises an iron core and an enameled wire wound on the iron core, the front end cover is directly sealed at the front end of the iron core, and the rear end cover is directly sealed at the rear end of the iron core. And the rear end cover is directly sealed at the rear end of the iron core. When the front end cover and the rear end cover are used for fixing the stator, the stator does not need to be covered by extending a section in the radial direction, complete contact is not needed, only the front end and the rear end of the stator are fixed, manufacturing materials of the end covers are saved, and cost is saved.

The utility model discloses a special machining center machine tool for a metal bar impact sample, which comprises a suspension and an impact hammer, the impact hammer is mounted in the suspension through a guide rod in a lifting manner, an elastic force accumulation acceleration impact mechanism is arranged between the upper part of the impact hammer and the inner top surface of the suspension, and the elastic force accumulation acceleration impact mechanism comprises an elastic body; according to the machining center machine tool special for the metal bar impact sample, when an impact hammer moves upwards to make contact with a lower ring, a spring is compressed upwards, elastic potential energy of the spring is accumulated, and impact acceleration is conducted on the impact hammer when the impact hammer naturally falls by means of the elastic potential energy accumulated through compression of the spring, so that the impact hammer naturally falls by means of gravity; the impact force generated by the falling of the impact hammer is increased due to the fact that the impact force generated by the falling of the impact hammer is also exerted on the impact force generated by the falling of the impact hammer, so that the suspension with the same height can be used for an impact test with larger impact force, or a drop hammer impact testing machine with the same impact force can be used for a lower design height of the suspension used in the application.