149results about How to "Reduce axial play" patented technology

A megawatt-level semi-direct driving wind generator comprises a wind wheel, a distance changer, a main axle, a speed accelerating box, a coupler, a generator, a cabin chassis, a bias motor and a control system. The chassis is fixed with the bias motor and the generator, the accelerating box is fixed with the side wall of the chassis, the accelerating box is first-stage planet accelerating gear box, and the motor is low-speed permanent magnetic three-phase synchronous generator. The invention can stabilize the transmission of transmitter, reduce impact, and reduce sealing demand or the like, with adjustable installed height, simple structure, high strength and accurate angle control on distance change as 0.1 degree, to output constant power.

A seat adjuster assembly includes an electric motor having an output shaft with a worm gear positioned in a gearbox, a spur gear meshing with the worm gear in the gearbox, a spindle shaft fixed to and driven by the spur gear coacting with a nut contained in a tube, and a linkage system connected to both a vertically movable upper vehicle seat part and a non-vertically movable lower vehicle seat part that positions vertically the upper vehicle seat part responsive to the position of the nut relative to the spindle shaft. At least one washer is provided on the spindle shaft. The spur gear is a plastic spur gear molded over the washer. A pair of leaf springs disposed in the gearbox bears against the spur gear and a wall of the gearbox.

The invention discloses a precision metering ceramic plunger liquid charge pump which structurally comprises a pump head, two single-direction valves, a pump body, a driving mechanism and a control driving unit. The singe-direction valves are connected into thread holes in the pump head through threads on upper valve bases and lower valve covers. The pump head penetrates through four through holes through inner hexagonal bolts, and the pump head and a pump body outer shell are fastened on a driving outer shell. A motor base is fastened on the driving outer shell by the fact that inner hexagonal bolts penetrate through four through holes. A driving motor is fastened on the motor base by the fact that inner hexagonal bolts penetrate through four through holes. One end of a plunger core in the pump body is connected with inner threads of a floating connector in the driving mechanism through outer threads. The driving mechanism is connected with the control driving unit. The liquid charge pump has corrosion resistance and abrasion resistance, impurities are not mixed into ceramic, so that the fact that medicine liquid is not contaminated during a liquid-charge process is guaranteed, the roughness of the surface of the ceramic is low, on-line washing is easy, and accuracy and speed are improved.

The invention discloses an electromagnetic coreless fixture with a locating ring capable of axially floating. Above a main shaft are arranged an inner magnetic pole, a magnetic shield ring, an inner floating ring and an outer floating ring, and on the inner floating ring is arranged a conical surface pocket provided with a ceramic ball. The inventive electromagnetic coreless fixture can avoid direct fixation of the locating ring on the main shaft to form rigid connection, which leads to direct influence of main shaft vibration and side swing on stability of the locating ring and a workpiece mounted on the locating ring; and effectively reduce the adverse effects of axial movement of the main shaft and workpiece outer diameter vertical deviation through floating connection formed between the inner and the outer floating ring by pocket connection, improve workpiece machining precision, effectively improve product quality and yield and production efficiency and effectively lower production costs.

The invention relates to an electric machine, in particular starting device, and a method for producing a support bearing assembly of an electric machine. The electric machine (10), in particular starting device, has a stator (29), and a rotor (37) which is equipped with a drive shaft and which is arranged radially in an inner side of the stator (29). Support bearing arrangements (66,69) are arranged on a rotating-axial side of the rotor. The arrangement causes bearing forces (Fa, Fr) in radial and rotating-axial direction, and arranged in a bearing cover (60). The arrangement supports a drive shaft (44), and a screw element (91) is held in a retaining thread (94) of the bearing cover by a screw-in thread. The screw element causes radial bearing force and axial bearing force. A cavity i.e. blind hole, is formed in the screw element. An independent claim is also included for a method for manufacturing support bearing arrangement of an electrical machine.

The invention discloses an automobile shock absorber spring dismounting and mounting method. According to the technical schem, firstly, vertical positioning of a shock absorber is realized, then a force applying mechanism is adopted on the shock absorber to make a spring be pressed downwards to enable the upper end of the spring to be separated and abut against a spring seat, and then the spring seat is disassembled; and the method is characterized in that when the shock absorber assembly is vertically positioned, the bottom contact bearing of the shock absorber is positioned, and at the sametime, a downward pressing component in the force applying mechanism adopts three points which are distributed in a triangular shape in the horizontal direction and a downward pressure in contact withthe upper end of the spring. The method has the advantages that the operation steps are simple, the spring skew amount of the shock absorber is small during dismounting and mounting, the working intensity of the shock absorber during dismounting and mounting can be reduced, and the dismounting and mounting efficiency is high.

The invention provided with a method for machining a low-roughness high-peak textured roller. The low-roughness high-peak textured roller is machined through the steps of adjusting equipment operation accuracy, changing the roller grinding travel, reducing transverse texturing color difference, avoiding surface arcing of the textured roller, reducing the defects of bright spots and scratches on the surface of the textured roller and changing a textured roller driver structure. Compared with the prior art, the method has the beneficial effects that on the condition of not changing the performance such as the high efficiency and low operation cost of an electric spark texturing device and the excellent disordered cold roller surface topography, the lowest roughness value of the electric spark textured cold roller is reduced to 1.2 microns, and the peak value of the textured cold roller is increased to more than 130 per square centimeter, the spraying and stamping performance of a cold-rolled automobile sheet can be obviously improved, and the method has wide application prospects in production of high-end cold-rolled automobile sheets.

The invention discloses an intelligent sealing device for ship tail shaft numerical control magnetic fluid. According to the main structure of the intelligent sealing device, a stuffing box is arranged at the sealed part of a tail shaft, one end of the box is provided with a gland, and the other end of the box is connected with a sternpost through a flange. Two layers of PTFE ring box sleeves are arranged in the middle of the box in parallel, and nx twelve radial hedging magnetic sector permanent magnets are embedded in each layer of box sleeve. Magnetic fluid circulating cavities are formed between the box sleeves in which the magnets are embedded and a shaft tube. The two sides of each permanent magnet box sleeve are each provided with a stainless steel circular ring and provided with eight magnetic fluid injecting or discharging holes, wherein the outer sides of the two stainless steel circular rings are each provided with a stainless steel clamping ring. An AH type metal framework teflon sealing ring is clamped on a tail shaft tube. An MCU is arranged, a magnetic fluid input pump and an electromagnetic overflow valve are controlled according to the pressure and temperature sensor information, the pressure in the magnetic fluid circulating cavities and the pressure at the draft of a warship and a submarine can be randomly the same, sealing, lubricating and cooling functions are achieved on the tail shaft tube through circulation of pressurized cold and hot magnetic fluid, and an electromagnetic sealing brake is arranged for strengthening static sealing of the tail shaft tube during downtime.

The invention relates to an asymmetric scroll compressor and an air conditioner. The compressor comprises a static scroll plate and a dynamic scroll plate, wherein the dynamic scroll plate is opposite to the static scroll plate, is rotatable relative to the static scroll plate and is provided with a back-pressure hole channel and a first hole channel; a compression cavity and a back-pressure chamber of the compressor can be communicated through the back-pressure hole channel; the first hole channel can be communicated with a pressurized air cavity in the compressor; a first airflow outlet of the first hole channel is symmetric to a second airflow outlet of the back-pressure hole channel relative to a rotating center of the dynamic scroll plate; the first hole channel can be communicated with the pressurized air cavity in the compressor, so that the direction of moment formed by pressurized airflow, passing the first hole channel, on the dynamic scroll plate is opposite to that of moment of pressurized airflow passing the back-pressure hole channel, influence of overturning moment on the dynamic scroll plate is reduced, and the stability of the asymmetric scroll compressor is improved.

The invention provides a feeder and belongs to the technical field of numerically-controlled machine tools. The problem that the conventional feeder is low in feeding efficiency and low in stability is solved. The feeder comprises a frame with a discharging hole, a feeding mechanism, a clamping mechanism, a programmable logic controller (PLC)-based control cabinet which is fixedly arranged on the frame, and a primary conveying mechanism and a secondary conveying mechanism which are used for feeding long bars positioned on the clamping mechanism, wherein the feeding mechanism is used for conveying the long bars to the clamping mechanism one by one; the clamping mechanism is used for fixedly clamping the long bars; and the feeding mechanism, the clamping mechanism, the primary conveying mechanism and the secondary conveying mechanism are arranged on the frame and are electrically connected with the control cabinet. The feeder has the advantages of simple structure, high efficiency and high stability.

The invention relates to a powerful drum of a coal cutter. The powerful drum comprises a drum body (8), a combined main blade (4) and an end disc (6), wherein small blades (9) are arranged at the tail part of the combined main blade (4); the bottoms of the small blades (9) are fixedly welded with the drum body (8); a water inlet channel (402) is formed inside the combined main blade (4); a group of spray holes (401) is formed in the side face of the tail part; the spray holes (401) are communicated with the water inlet channel (402); the spraying direction moves along the axial direction of the drum body; auxiliary blades (2) are arranged on the combined main blade (4); a sealing plate (3) is arranged between the auxiliary blades (2) and the combined main blade (4); a rib plate (5) is fixedly arranged between the combined main blade (4) and the drum body (8); the end disc (6) is welded on the drum body (8); and a wear-resistant plate (7) and small end disc cutting teeth (10) are arranged on the outer side of the end disc (6) along the axial direction of the drum body. According to the powerful drum of the coal cutter disclosed by the invention, the strength and wear resistance of the coal cutter drum are enhanced, and the service life of the drum is prolonged.

The invention provides a double-face abrasive belt polishing machine for machining a single-layer welding material H309LNB. The double-face abrasive belt polishing machine comprises a machine base, anauxiliary conveying device, a lower polishing device, an upper polishing device, an upper blowing device and a lower blowing device. The auxiliary conveying device is connected to the machine base. The lower polishing device is connected to the machine base. The upper polishing device is connected to the machine base. The upper polishing device is installed above the lower polishing device. The upper blowing device is installed on the upper polishing device, and the lower polishing device is connected with the lower blowing device. The polishing efficiency is high.

The invention discloses a method for reducing axial drifting of rolling mill rolls, and belongs to the technical field of hot rolling. The method for reducing axial drifting of the rolling mill rolls comprises the following steps that the rotating direction of the first working roll and the rotating direction of the second working roll are determined, and the axial force direction of the first working roll and the axial force direction of the second working roll and whether the first working roll and the second working roll are active or passive during rotation of the first working roll and the second working roll are determined; whether the first working roll and the second working roll are in a right cross state or a left cross state is determined according to the right-hand rule or the left-hand rule; a worn lining plate of the first supporting roll and a worn lining plate of the second supporting roll are replaced or padded so as to restore the original design size; the worn lining plates are padded to push the first working roll to be parallel to the first supporting roll and push the second working roll to be parallel to the second supporting roll. According to the method for reducing axial drifting of the rolling mill rolls, harmful crossing and drifting of a four-high rolling mill roll system can be quickly and accurately inhibited.

The invention provides a manual auxiliary support. Fixing bolts are arranged on the periphery under a base. A guide hole is vertically formed in the middle of the base. An ejector rod is arranged in the guide hole in a matched mode. A spring is arranged under the ejector rod. The ejector rod stretches out of the base from the guide hole. A clamping sleeve used for clamping an opening is also arranged in the guide hole. The ejector rod is installed in the clamping sleeve in a matched mode. A locking screw corresponding to the clamping sleeve is arranged on the side wall of the base. A positioning hole is formed in the side wall of the clamping sleeve. A fixing screw matched with the positioning hole is arranged on the side face of the base. A cover plate is arranged at the top of the base. The ejector rod stretches out of the cover plate. An adjustment bolt is arranged at the bottom of the spring. An air outlet is further formed in the position, on the lower portion of the ejector rod, of the side wall of the base. According to the manual auxiliary support, the ejector rod has a floating supporting effect relative to the spring, the locking purpose can be achieved manually through surface contact of the clamping sleeve, and convenience and rapidness are achieved; the manual auxiliary support is mainly used for designing clamps for poor-rigidity parts such as thin-walled parts and parts in irregular shapes, rapid fixing and installing are achieved, the structure is simple, and the manual auxiliary support is economical and practical.

The invention discloses a knob-type gating switch balancing device for automobile electrical appliances. The device comprises a switch upper cover and a switch lower cover, and is characterized in that: the switch upper cover is arranged on a gating switch balancing body by an upper positioning column and a lower positioning column, and is fixed in an upper cover fixing groove by an upper cover fixing clip; the gating switch balancing body is arranged in the switch lower cover; and limit structures are formed between the upper cover fixing clip of the switch upper cover and the upper cover fixing groove of the gating switch balancing body, between the limit groove of the gating switch balancing body and the internal limit column of the switch lower cover, and between the stop position of an elastic arm and the external limit column of the switch lower cover. The plurality of structures of a traditional knob switch are integrated together, so that the knob-type gating switch balancing device is high in integration level and reliable in performance, and a mould is simple and easy to realize. The knob-type gating switch balancing device has the advantages that: shaking quantity is greatly reduced and operating force is uniform in the operating process in circular motion; and the knob-type gating switch balancing device has clear gears, a high integration level, good hand feel, high practicality, low cost and high performance, and is easy to machine, quick in installation, simple and reliable.

A circular-shank tool including a tool holder for improving the centering of the shank of the circular-shank tool in the locking sleeve by a configuration of the retaining elements and to improve an ability of the shank to rotate in the sleeve. To achieve this, the retaining elements are distributed between two stamped edges that lie transversely with respect to a longitudinal axis of the locking sleeve and are stamped inwards or indented, the stamped edges extend over part of the circumference of the locking sleeve and are interspaced at a distance that corresponds to the width of the peripheral groove in the shank of the circular-shank tool and the retaining elements form a coaxial concave centering section facing the convex groove base of the peripheral groove.

The invention relates to a ball screw driving structure for a numerically-controlled machine tool. The ball screw driving structure for the numerically-controlled machine tool is innovatively characterized by comprising a bearing seat, a transmission case, a ball screw and a motor, the bearing seat is fixed at one end of a machine tool base, the transmission case is fixed at the other end of the machine tool base, the left end of the ball screw is supported in the bearing seat through a bearing pack A, the right end of the ball screw is supported in the transmission case through a bearing pack B, the motor is mounted on a motor mounting hole of the transmission case, and an output shaft of the motor is connected with the right end of the ball screw through a coupler. The ball screw driving structure for the numerically-controlled machine tool has the advantages that the ball screw driving structure is applicable to medium-speed rotating and high-precision use conditions as one end of the ball screw is fixed while the other end of the ball screw is movable; and the bearing pack B is axially limited by the aid of a pressing ring, an inner ring lock nut, an inner ring limit step of the ball screw and the transmission case step face, axial clearance is reduced beneficially, and transmission and positioning precision is high.

The invention discloses a retaining ring which can compensate axial space; the retaining ring is an open-typed retaining ring, and comprises a thrust face and an outer ring surface; the retaining ring is characterized in that: the retaining ring also has a sliding surface, the shape of the cross section of which is wedge-shaped. The preferable value of the included angle between the sliding surface and the thrust face is 5-25 degrees. Suitable included angle slope is determined according to the axial force and the friction coefficient of the sliding surface of the retaining ring. Simultaneously, the shape of an installation groove of the retaining ring is modified correspondingly and changed into an inclined place with the same inclined angle by coordinating with the sliding surface, so the retaining ring which adapts to the installation groove of the retaining ring can slide and regulate the space automatically. The application of a retaining ring which can compensate axial space is used axially and fixedly by the steering input gear shaft of a gear rack type machinery redirector which is widely used in micro cars or light cars. The test and the actual operation prove that the retaining ring has good axial space compensation function, reduces the axial coordinating space and the axial movement value of the gear when in work, removes the abnormal meshing sound, and improves the working performance and reliability of the redirector.

A pole piece passing roller structure is disclosed, It comprises a first passing roller, a first central shaft and a first fixing assembly, wherein one end of the first passing roller inner wall is provided with a first rolling assembly, the other end of the first passing roller inner wall is provided with a second rolling assembly, the first passing roller is connected with the first central shaft through the first rolling assembly and the second rolling assembly, the second rolling assembly is connected with the first central shaft, and the first fixing assembly is connected with one end ofthe first central shaft. The pole piece passing roller structure realizes that the first bearing is not subjected to axial pressure and ensures that the first bearing is in a zero clearance state, sothat the first passing roller is subjected to less frictional force when rotated, the inertia of the first passing roller is small, avoiding the broken belt or wrinkling caused by excessive moment ofinertia of the pole piece, The axial movement of the first passing roller is reduced, a gap is arranged between the second bearingand the second step of the first central shaft, and the axial pressuregenerated by squeezing the second bearing is avoided, so that the second bearing is only used for supporting the first passing roller, so that the resistance of the first passing roller is smaller, and the quality and the yield of the lithium battery cell production are greatly improved.

The invention provides a novel axial flow pump. The novel axial flow pump comprises an axial flow pump body and a seal assembly, wherein the axial flow pump body comprises a shell and a pump shaft; aguide pipe communicating with the interior of the shell is arranged on the top of the shell; an annular supporting part is arranged on the inner wall of the top end of the guide pipe; a rubber bearingmatched with the pump shaft is arranged in the guide pipe; the pump shaft comprises a shaft shoulder supported against the bottom end of the rubber bearing; the seal assembly comprises a first elastic adjusting part and a second elastic adjusting part; the first elastic adjusting part is arranged on the pump shaft in a sleeving manner and is located between the supporting part and the rubber bearing; the second elastic adjusting part is arranged on the rubber bearing in a sleeving manner and is located below the first elastic adjusting part; a buffer layer which is arranged on the rubber bearing in a sleeving and sealing manner is arranged between the first elastic adjusting part and the second elastic adjusting part; a containing cavity for placing filler is formed by the first elastic adjusting part, the buffer layer, the rubber bearing and the pump shaft in a surrounding manner; and wedge-shaped sealing rings are pressed between the first elastic adjusting part and the supporting part and between the second elastic adjusting part and the shaft shoulder. The novel axial flow pump has relatively good sealing property and cooling effect.