297 results about "Lightening holes" patented technology

The utility model relates to a novel double steel plate concrete composite wall structure for a bridge tower, which comprises a shear wall system, two ends of the shear wall system are connected with steel-concrete composite columns through high-strength bolts, and the shear wall system comprises two wall steel plates which are arranged in parallel. A plurality of longitudinal partition plates are erected between the two wall body steel plates at intervals in the length direction of the wall body steel plates, the longitudinal partition plates are vertically and fixedly connected to the two wall body steel plates, a plurality of round lightening holes are formed in the longitudinal partition plates, and in-wall concrete is poured between the two wall body steel plates and the longitudinal partition plates. Longitudinal partition plates with lightening holes are arranged in the shear wall system to serve as stiffening ribs, and long studs serve as connecting pieces of a wall steel plate and concrete in the wall, so that the wall can be divided into a plurality of cavities, the construction form is simple, the stress of the connecting pieces is clear, the material consumption is reduced, and the construction cost is reduced. And the strength, ductility, corrosion resistance and fireproof performance of the structure are enhanced.

The utility model discloses an unmanned aerial vehicle body force-bearing bulkhead. The overall structure comprises nacelles, a force-bearing bulkhead body and screws. The bearing bulkhead is of a C-shaped section structure, adopts a machining part or a forge piece and is a composite material part in the structural form; a connector machining part is arranged in the C-shaped frame of the force-bearing bulkhead, a threaded positioning hole is formed in the C-shaped frame, and the C-shaped frame is connected with the nacelle through a screw; the bearing bulkhead comprises a front main bearing frame and a rear main bearing frame, and lightening holes are formed in web faces of the front main bearing frame and the rear main bearing frame, so that the overall weight is reduced. On the one hand, the structural form is simple, and good rigidity and strength are achieved; compared with a machined part or a forged part, the composite material part has the advantages that the overall weight can be reduced, the production and manufacturing period is short, the cost is low, and the forming process is simple; on the other hand, the lightening holes are formed, so that the load capacity of the load cabin is increased; the C-shaped frame connector is connected with the nacelle end through a positioning screw, so that the fuselage and the nacelle end are firmly connected together, and force is guided to the force bearing frame from the nacelle.

The invention discloses a drilling method. The drilling method comprises the steps that a plurality of concentric lightening holes are preset in a workpiece; an expansion chuck of the automatic feeding drill is controlled to move into the blind hole, and the expansion chuck is tightly supported on the inner wall of the blind hole; and a drill bit of the automatic feeding drill is started to drill a riveting hole in the bottom of the blind hole. The expansion chuck is tightly supported in the blind hole, the stability of the expansion chuck can be guaranteed, an additional clamping device is not needed to clamp the expansion chuck, the drilling cost can be effectively reduced, stable operation of the automatic feeding drill can be guaranteed, and then the drilling precision is guaranteed. Besides, during drilling, the expansion chuck and the drill bit are moved into the blind hole, other extra devices do not need to be operated to position the expansion chuck, and therefore the drilling efficiency can be effectively improved. The invention further discloses drilling equipment, the concentric lightening hole in the workpiece can be used for supporting and positioning the expansion chuck of the automatic feeding drill, and the drilling efficiency and the drilling precision can be effectively improved.

The invention discloses a fine boring machining tool for the inner cambered surface of an anode tank of a lithium battery crude foil engine. The fine boring machining tool comprises an auxiliary spindle, a tool rest, a center frame and a support. The tool rest is welded on the auxiliary spindle; the center frame is fixed on the support; the knife rest is integrally rhombic, is thick in the middle and thin at two ends and is symmetrically distributed; lightening holes are formed in the tool rest, tool boxes are arranged on the two sides of the tool rest, and boring tools can be installed in the tool boxes. The knife rest and the auxiliary spindle are welded into a whole and then quenched and tempered, the quenched and tempered knife rest is welded with a knife handle at one end of the auxiliary spindle, and the other end of the knife rest on a horizontal lathe serves as a sliding end which is supported by a support and a center frame. The solution that in the prior art, product machining can be completed only by purchasing a customized machine tool is eliminated, and the investment cost of fixed assets is saved; the machining precision and the machining efficiency of the fine boring tool are superior to those of a special customized machine tool.

A rotor structure comprises core laminations, two ring covers, and a hollow shaft. The core laminations have a horizontal side with multiple equally angled lightening holes. Each ring cover has a horizontal inner surface that contacts the outermost horizontal side of the core lamination. The horizontal inner surface of the ring covers features guiding protrusions corresponding to the lightening holes. The guiding protrusions form grooves at their end surfaces that serve as oil inlets and outlets located along the inner and outer circumferential surfaces of the ring covers, respectively. The core laminations and the ring covers are mounted on the hollow shaft, and the oil inlet of the ring cover is fluidly connected to the oil injection hole of the hollow shaft. The guiding protrusions can slow down the flow velocity centrifugally to ensure the consistency of the oil inlet and outlet.

The invention relates to the technical field of magnetic levitation vehicle walking mechanisms, and discloses a frame type suspension framework suitable for low-vacuum pipeline superconducting electric magnetic levitation. The suspension framework comprises a framework main structure, a supporting wheel mounting seat, a guide wheel mounting seat, a vertical shock absorber mounting seat, a longitudinal shock absorber mounting seat, a transverse shock absorber mounting seat, a hoisting seat, a transverse backstop mounting seat, a safety steel cable mounting seat, an equipment mounting plate and an emergency supporting wheel mounting interface, the framework main structure comprises framework end beams, framework side beams and framework cross beams, the framework end beams, the framework side beams and the framework cross beams are respectively provided with a plurality of lightening holes, and the framework main structure is made of aluminum alloy.

The utility model discloses an anti-bending waterproof playing card which comprises an anti-bending reinforcing layer located in the center of the playing card, a front paperboard base layer is arranged on one side of the anti-bending reinforcing layer, a back paperboard base layer is arranged on the other side of the anti-bending reinforcing layer, and waterproof wear-resistant layers are arranged on the outer side faces of the back paperboard base layer and the front paperboard base layer. Under the action of the anti-bending reinforcing layer, the bent playing cards can be automatically driven to be quickly reset, the playing cards are prevented from being broken in the bending process, the anti-bending performance of the playing cards is improved, the anti-bending reinforcing layer is of a PVC plate structure, a plurality of lightening holes are formed in the surface of the anti-bending reinforcing layer, the anti-bending reinforcing layer is light in weight, and the anti-bending performance of the playing cards is improved. The comfort of holding the playing cards by a card holder is improved; the paper substrate in the playing card can be prevented from being damped through the waterproof wear-resistant layer, in addition, the frosted structure is arranged on the surface of the waterproof wear-resistant layer, the friction force of grabbing the playing card by hands is increased, and the practical performance of the playing card is improved.

The invention discloses a light-weight wheel and a non-inflatable wheel assembly, and belongs to the technical field of tires, and the light-weight wheel comprises a connecting disc and a plurality of spoke pieces. The spoke pieces with the spoke parts and the supporting parts are evenly distributed on the inner side of the connecting disc in the circumferential direction with the center of the connecting disc as the circle center, the supporting parts are distributed in the circumferential direction to form the rim, the spoke parts are fixed to the connecting disc in the radial direction of the rim in the fan shape, and the supporting strength of the wheel is guaranteed. The first lightening holes are formed in the spoke part, so that the weight of the wheel is reduced, materials are reduced, the spoke piece has the spoke function and can form a rim, and therefore the types of accessories can be reduced, the machining difficulty of the wheel is lowered, and the machining efficiency is improved; therefore, the small-batch development and processing mode of the wheels can be simplified, the research and development cost is reduced, and expensive large-size molds are not needed for large-batch production of the wheels, so that the mold development difficulty, the manufacturing cost and the manufacturing period during large-batch production can be simplified.

The utility model discloses a light friction plate structure based on a parking brake shoe assembly, which comprises a friction plate body, the friction plate body comprises a friction layer and a back plate, lightening holes are arranged on the surface of the back plate, and a heat dissipation channel is arranged inside the friction layer. According to the light friction plate structure based on the parking brake shoe assembly, the multiple sets of lightening holes are formed in the back plate, and the back plate is made of light aluminum alloy materials, so that the overall weight of the friction plate can be effectively reduced, the requirement for light-weight design of an automobile is met, fuel consumption of the automobile is reduced, and the purposes of energy conservation and emission reduction are achieved; and the heat dissipation channels formed in the friction layer are communicated with the lightening holes in the back plate, so that a good heat dissipation path is formed, the heat dissipation speed of the friction plate is increased, performance reduction of the friction plate caused by high temperature can be effectively avoided, the braking performance of the friction plate is improved, the service life of the friction plate is prolonged, and the parking braking safety of an automobile is enhanced.

The utility model discloses a box type rib part forming frock with flanging hole, including bottom plate, be equipped with with the male die of box type rib matching on bottom plate, be equipped with recess on male die, and recess is matched with the flanging hole of box type rib, still be equipped with stripping top plate in recess, still be equipped with jackscrew hole on stripping top plate, be equipped with stripping jack in jackscrew hole. The utility model discloses when stripping, use the stripping wedge of wedge to loosen the peripheral area of box type rib part, then utilize stripping jack to drive stripping top plate to go up, can strip easily, solved the problem such as difficult stripping or stripping tearing, long time of stripping of box type rib composite material part after forming of internal lightening hole flanging.

The utility model relates to medical supplies technical field especially, a kind of injection mould for batch production of digestive endoscope mouth pad, the utility model mainly is constituted by annular support, fixed mould, radial displacement drive assembly and movable mould, radial displacement drive assembly is used to drive movable mould to carry out radial displacement towards or away from corresponding fixed mould, the bottom plate of annular support is opened in circumferential direction with multiple blanking ports, blanking port is located below corresponding fixed mould, first core block for forming endoscope through hole is equipped in fixed mould, first core block can be displaced to first storage groove under the driving of first micro push rod when demolding, second core block for forming lightening hole is equipped in movable mould, second core block can be displaced to second storage groove under the driving of second micro push rod when demolding, by this mode, the digestive endoscope mouth pad formed can be automatically demoulded and dropped under the action of its gravity, and fall into the collection area below through blanking port.

The novel combined type cover plate comprises a base plate, a lightening hole is formed in the middle of the base plate, sinking grooves are distributed in the positions, on the two sides of the lightening hole, of the base plate, a through kidney-shaped long hole is formed in the middle of each sinking groove, the end of the base plate extends outwards to form a first supporting arm, and a second supporting arm is formed in the middle of each first supporting arm. The side face, close to the first supporting arm, of the base plate extends outwards to form a second supporting arm, and coaxial mounting holes are formed in the first supporting arm and the second supporting arm. According to the novel combined type cover plate, the original cover plate and the shock absorber support are combined into one part, so that the cover plate can be accurately positioned in the installation and maintenance process; in addition, tolerance accumulation is avoided through one-time machining, the mounting precision can be effectively improved, the riveting precision is guaranteed, and the bearing capacity of the vehicle is improved.

The utility model provides a crankshaft lightening hole machining auxiliary tool, and relates to the technical field of crankshaft lightening hole machining. A guide section, a transition section and a fixing section which are integrally formed are arranged on a body of the auxiliary tool, a plurality of wedge-shaped pieces protruding in the radial direction are arranged on the outer wall of the guide section in an annular array mode, a groove is formed between every two adjacent wedge-shaped pieces, the groove bottom of each groove extends inwards in the radial direction of the guide section to form a boss, and the groove bottom of each boss extends inwards in the radial direction of the guide section. The wedge-shaped piece extends along the outer portion of the transition section to form a wedge-shaped extending portion, and the plane where the fixing section is located in the radial direction is perpendicular to the outer wall of the wedge-shaped extending portion. According to the auxiliary tool for machining the crankshaft lightening hole, dynamic guiding of the boring rod is achieved by inserting the crankshaft lightening hole into the crankshaft pre-drilling hole, machining precision and stability are guaranteed, and efficiency is improved.

The utility model provides a BMS (battery management system) integrated support which is used for battery limiting and fixing equipment and comprises a base, a supporting seat is welded on the base, a movable seat is movably mounted on the supporting seat, a fixing plate is welded at one end of the movable seat, fixing grooves are formed in the fixing plate and the base, a limiting plate is welded on the base, and the limiting plate is movably mounted on the movable seat. The limiting plate is matched with the movable seat, a weight reduction opening is formed in the movable seat, and a heat dissipation opening is formed in the base. The internal wire arrangement plate moves downwards under pushing of the supporting mechanism, the wire arrangement plate moves upwards to extrude and fix a wire harness, later wire arrangement and installation are facilitated after the wire harness is extruded and fixed, the baffle and the supporting seat are matched to protect the side of the wire harness, and damage to the wire harness caused by external collision force is avoided.

An assembly supports external masonry veneer. A bracket mounts to a load bearing wall support structure. A shelf angle has a horizontal leg that defines a shelf for the veneer, and an upstanding leg supported by mounting brackets that secure the assembly to the wall structure. The horizontal shelf is segmented. The back of the shelf angle flexes between the segments to allow the shelf angle to follow the shape of a curve wall. The shelf angle is secured to the mounting brackets with locking clips. The mounting brackets may be channels. They may have lower abutments. The abutments may extend rearwardly. An insulator may be placed between the back and structure. The mounting bracket may have lightening holes. The lightening holes may be in a framework array including alternating diagonal struts. A low thermal conductivity coating may be applied to the bracket.

The invention discloses an additive manufacturing process for restraining deformation of a substrate, which belongs to the technical field of additive manufacturing and comprises the following steps: forming a groove on the lower surface of a tool mother board and positioned on the outer side of a lightening hole, arranging #-shaped lightening grid ribs in the groove and positioned on the outer side of the lightening hole, and dividing the groove into a plurality of grid grooves by the lightening grid ribs, a plurality of mounting threaded holes penetrating through the tool mother board are formed in the upper surface of the tool mother board at equal intervals; the base plate is placed on the upper surface of the tool mother plate and connected with the tool mother plate through bolts; transferring and clamping the assembled tool mother plate and base plate on a friction stir additive manufacturing workbench; according to the friction stir solid-phase continuous additive forming method, the base plate is restrained through the steel tool mother plate with the #-shaped weight reduction grid rib reinforcing structure, the deformation trend of the base plate caused by long-term stress in the friction stir additive manufacturing process can be effectively restrained, and therefore deformation of the base plate is prevented, and the friction stir solid-phase continuous additive forming operation is achieved. And the additive manufacturing precision is improved.

The utility model discloses an automobile control arm assembly, which belongs to the technical field of automobile accessories and is characterized in that the surface of a control arm assembly body is provided with a lightening hole, a ball head component, a bushing component and a rubber sleeve, the outer side of the rubber sleeve is provided with a reinforcing sleeve, and the inner wall of the rubber sleeve is in contact connection with a connecting rod; the automobile control arm assembly comprises a rubber sleeve, a connecting rod is arranged on the rubber sleeve, a first fastening sleeve and a second fastening sleeve are connected to the surface of the connecting rod through threads, and connecting parts are arranged on the surfaces of the first fastening sleeve and the second fastening sleeve. The use stability of the rubber sleeve is effectively improved, and the fastening sleeves can be prevented from rotating or loosening due to vibration through the anti-falling blocks arranged on the two fastening sleeves and the anti-falling grooves formed in the two anti-falling sleeves, so that the connecting rod is separated from the control assembly body, and the connecting safety of the connecting rod is greatly improved.

The utility model belongs to the technical field of heat treatment equipment, and relates to a carburizing anti-ellipse tool for a large-diameter gear, the gear is provided with outer teeth and a central hole, one or more groups of lightening holes distributed along the circumferential direction are arranged between the outer teeth and the central hole, more than two lightening holes are selected as penetrating and hanging holes, and the outer teeth are provided with a plurality of holes. The selected lightening holes are located on the same diameter of the gear, supporting rods are arranged in the penetrating and hanging holes in a penetrating mode respectively, the two ends of each supporting rod are sleeved with a common limiting plate respectively, the supporting rods are arranged in parallel, and the limiting plates are perpendicular to the supporting rods. The two ends of the supporting rod are placed on the tool frame, and the limiting plate is located on the inner side of the tool frame. The carburizing anti-ellipse tool for the large-diameter gear can prevent the large-diameter gear from generating ellipse change during carburizing.

The utility model belongs to the technical field of automobile brake systems, and particularly relates to a light-weight automobile brake disc. The outer side of the disc body is provided with an arc-shaped groove and embedded radiating fins, and the groove is filled with a heat-conducting silica gel layer; a mounting hole is formed in the center of the disc body, honeycomb lightening holes are formed around the disc body, and a tungsten carbide coating is sprayed on the inner wall; a first reinforcing rib and a second reinforcing rib are arranged on the two sides of the disc body and are welded and fixed through a connecting plate. The disc body is made of an aluminum alloy base material, the surface of the disc body is subjected to anodic oxidation and graphene coating treatment, and the disc body has both light weight and corrosion resistance. By optimizing the structural design, the weight is remarkably reduced while the strength is guaranteed, the heat dissipation performance is improved, and the automobile brake pad is suitable for a high-performance vehicle brake system and meets the requirements of modern automobiles for light weight and efficient heat dissipation.

The utility model relates to the technical field of machining precision measurement, in particular to a blind hole depth measuring tool, which comprises a shell, a dial gauge fixed at the top of the shell, and a measuring rod and a spring which are movably arranged in the shell, the shell is composed of a sleeve, an annular sealing plate and a fixing sleeve, the annular sealing plate is arranged at the top of the sleeve, and the fixing sleeve is arranged on the inner ring of the annular sealing plate and used for fixedly installing the dial gauge; two sections of guide rings matched with the inner diameter of the sleeve are arranged on the measuring rod, a measuring head of the measuring rod is exposed out of the sleeve, a positioning ring matched with the inner diameter of the blind hole is arranged on the measuring head, and a lightening hole penetrating through the measuring head is formed in the measuring rod; one end of the spring is connected with the annular sealing plate, and the other end abuts against the guide ring on the measuring rod; and a plurality of limiting screws are annularly arrayed between the two sections of guide rings on the sleeve and are used for preventing the measuring rod from sliding out of the sleeve. The utility model has the advantages of simple operation and high measurement precision, is convenient to replace the measuring rod to meet the measurement of blind holes of different specifications, and also meets the measurement of blind holes with central bosses at the hole bottoms.

A first structural part is located in a body located at an air vehicle. The first structural part carries loads on the body. A second structural part is located opposite the first structural part. Two lightening holes in the form of a circular opening on the first structural part are opposite to two lightening holes in the form of a circular opening on the second structural part. An equipment provides various functions on the air vehicle. At least one bracket enables the equipment to be connected to the first structural part and the second structural part.

A hoisting plate is fixedly connected with a boss through a net plate to form a hoisting frame, the two hoisting frames are fixedly connected together through two bridge frames to form the damping frame, the hoisting plate, the bridge frames, a supporting table, the boss and the net plate are all made of Q355B steel, the thickness of the supporting table is 20 mm, the thickness of the supporting table is 20 mm, and the thickness of the boss is 20 mm. The thickness of the hoisting plate is 8mm, the thickness of the net plate is 6mm, and the thicknesses of the bridge frame and other plates are 5mm; the net plate and the hoisting plate are provided with cross-shaped reinforcing ribs with the width of 5 mm and the height of 8 mm, and triangular reinforcing ribs with the thickness of 5 mm are arranged on the rack main body; lightening holes are formed in a web plate of the screen plate; the boss is matched with the supporting table in a convex-concave structure, and the polyurethane pouring layer is filled in a convex-concave gap between the boss and the supporting table to form an anti-falling structure. The vibration isolator can effectively reduce impact stress, and has the characteristics of good vibration isolation effect, irradiation resistance, corrosion resistance, light weight, high strength and the like.

The invention relates to the technical field of hydraulic supports, in particular to a hydraulic support tail beam waste rock blocking device which comprises a top plate, main rib plates, a bottom plate, a hook mounting plate and hooks, the top plate is arranged at the tops of the main rib plates, and the bottom plate is located between the main rib plates; the hook mounting plates are symmetrically arranged at two ends of the top plate; the hook mounting plate is detachably connected with the hook; the hook is hung on the edge of the side wall of the tail beam; the bottom plate is detachably connected with the hoisting hole in the side wall of the tail beam. The bottom plate and the hook can effectively ensure that the waste rock blocking device is fixed on the tail beam; the symmetrical design of the hook mounting plates can adapt to movable working faces on the two sides of the tail beam, and compatibility is achieved; the structural strength is improved through the design of the reinforcing ribs, the weight of structural parts is effectively reduced through the design of the lightening holes, installation and maintenance are convenient, and the problems that in underground production, the space between the adjacent tail beams of the hydraulic support cannot be closed, and waste rock leakage is serious are effectively solved.

The present invention discloses a rotor core, a rotor having the same, and a motor and an electronic pump. The rotor core comprises: an integrally formed core having a central axis hole in the middle thereof; a plurality of magnet slots spaced circumferentially along the inner or outer periphery of the core, each magnet slot being axially disposed, and the spacing angles between adjacent magnet slots being different; a plurality of permanent magnets, each of the permanent magnets being inserted into the magnet slots in a one-to-one correspondence; and a plurality of lightening holes, the lightening holes being axially disposed on the core and unevenly distributed. The present invention reduces cogging torque and torque ripple without adding additional assembly costs, labor costs, or product costs.

The utility model relates to an indication error calibration device for an adjustable three-point inside micrometer, and belongs to the technical field of measurement and detection. Comprising a three-point inside micrometer (1), a gauge block (2), a bottom plate (4) and lightening holes (3), the bottom plate (4) is a square plate, an equilateral triangle groove is formed in the middle of the bottom plate (4), the three-point inside micrometer (1) is arranged in the groove, the section of the three-point inside micrometer (1) is circular, the arc surface of the three-point inside micrometer (1) is tangent to the two side edges of the equilateral triangle groove, and the gauge block (2) is arranged between the lower portion of the three-point inside micrometer (1) and the bottom edge of the equilateral triangle groove. The inner wall of the equilateral triangle groove and the gauge block (2) form a calibration point size; the bottom plate (4) is provided with a plurality of circular lightening holes (3), so that the required standard inner diameter of any specification can be combined by using the existing gauge block, and the gauge block has the effects of flexibility, convenience and simplicity in operation.

The invention discloses a split type cross beam aluminum alloy frame for a heavy truck, which belongs to the technical field of hydrogen energy heavy truck manufacturing, is integrally made of an aluminum alloy material, realizes replacement of steel with aluminum, and comprises a main body frame module. The module comprises two groups of longitudinal beams which are arranged in parallel at intervals, lightening holes are formed in the side walls of the longitudinal beams, longitudinal beam front-section reinforcing plates are arranged at the front ends, and middle-section outer-side reinforcing plates are arranged on the outer sides of the side walls. And first to third middle cross beam assemblies and first to fifth upper cross beam assemblies are sequentially arranged between the two groups of longitudinal beams from front to back. The cross beam assemblies and the reinforcing plates are connected with the longitudinal beams in a threaded mode. The longitudinal beams, the cross beam assemblies, the front section reinforcing plates and the middle section outer side reinforcing plates are all made of aluminum alloy materials. By means of the arrangement, the weight of the whole frame is reduced by 32%, all the components are connected in a screwed mode, and the fatigue strength is improved by 40%.

The invention relates to the technical field of loudspeakers, in particular to a miniature loudspeaker which comprises a box body composed of an upper shell and a lower shell, and a loudspeaker and BASS powder arranged in a cavity of the box body. A first metal sheet and a second metal sheet are embedded in the upper shell and the lower shell through injection molding in an integrated mode, and metal is used for reinforcement. The metal sheet is pretreated to increase the roughness, and multiple structures such as the material passing hole with the countersunk head chamfer and the first folded edge with the clamping groove are designed, so that the binding force of the metal sheet and the plastic is enhanced, and the firm combination of the metal and the plastic is realized. The internal cavity is divided into an independent positioning cavity and an independent filling cavity through the support, the positioning cavity and the filling cavity are used for installing the loudspeaker and filling BASS powder respectively, and the acoustic structure is optimized in cooperation with the canning hole and the protective screen cloth. In addition, due to the design of positioning hole sets, destressing holes, fillets, lightening holes and the like on the metal sheet, the manufacturability and reliability of the product are further improved. According to the invention, the loudspeaker is ultrathin, high in strength, high in reliability and excellent in acoustic performance.

The utility model provides a rotor punching sheet, a rotor iron core, a rotor, a motor, a driving system and a vehicle. The rotor punching sheet comprises a punching sheet body, and the punching sheet body is provided with a mounting hole, a plurality of lightening holes, a plurality of pressure relief holes and a plurality of magnet groove groups. The plurality of magnet groove groups are arranged at intervals along the circumferential direction of the mounting hole; each magnet groove group is positioned between the mounting hole and the pressure relief hole; the part, located between every two adjacent pressure relief holes, of the punching sheet body is a first part of the punching sheet body, the part, located between every two adjacent magnet groove sets, of the punching sheet body is a second part of the punching sheet body, and the part, opposite to the second part of the punching sheet body, of the peripheral wall of the punching sheet body is a matching wall of the punching sheet body. The lightening hole is located between the matching wall and the first part of the punching sheet body. According to the rotor punching sheet, the structure of the rotor punching sheet is reasonably arranged, and the plurality of pressure relief holes and the plurality of lightening holes are matched, so that extrusion stress transmitted to the outer edges of the magnet groove groups and the rotor punching sheet from all directions and all angles can be reduced, and the extrusion stress can be released through deformation of the plurality of pressure relief holes and the plurality of lightening holes; the vibration noise during the operation of the motor can be reduced, the deterioration of the performance of the motor can be effectively inhibited, and the use performance and the market competitiveness of the product are improved.

The utility model relates to the technical field of cutting machines, in particular to a three-dimensional five-axis laser cutting machine cross beam which comprises a cross beam body, the cross beam body comprises a bent front coaming and a bent rear coaming, the bent front coaming and the bent rear coaming form a trapezoid box shape, and a plurality of lightening holes are formed in the bent front coaming and the bent rear coaming. A reinforcing assembly penetrates through the bent rear coaming, and a long rib plate is fixed in the reinforcing assembly; sliding plate mounting bases are arranged at the two ends of the front bending coaming and the two ends of the rear bending coaming correspondingly and used for being connected with the output end of a double-drive motor, and movement of the cross beam is achieved. Compared with the prior art, the weight of the cross beam is reduced, the dynamic performance and the stability of equipment are improved, and the reliability and the strength of the cross beam structure are guaranteed.

The invention is suitable for the technical field of wind driven generators, and provides a wind driven generator hub and an internal support machining method.The wind driven generator hub comprises a top face, side faces and a bottom face, a top face boss is formed at the top of the top face, and a top face through hole is formed in the center of the top face boss; three sets of bearing bosses are formed on the outer wall of the top face boss, reinforcing ribs perpendicular to the bearing bosses are formed on each set of bearing bosses, and reinforcing holes are formed in the bearing bosses in a penetrating mode. The reinforcing ribs are located between every two adjacent sets of bearing bosses and integrally formed with the hub, side grooves are symmetrically formed in the side faces, side face through holes are formed in the side grooves, a first mounting hole and a second mounting hole which are used for being connected with a variable pitch system are formed in the ends of the side faces, a bottom groove is formed in the center of the bottom face, and the side face through holes are formed in the bottom groove. A bottom face through hole is formed in the center of the bottom groove, and lightening holes distributed in a surrounding mode are further formed in the bottom face.