206results about How to "Avoid direct friction" patented technology

The invention provides a compact axial-flow magnetic-levitation artificial heart pump, in particular to an artificial heart pump characterized in that two permanent magnet bearings and a mix of radial magnetic bearing suspension, and the radial magnetic bearing and a permanent magnet motor share a stator and a rotor. The compact axial-flow magnetic-levitation artificial heart pump has the structure that the compact axial-flow magnetic-levitation artificial heart pump comprises a stator assembly, a rotor assembly, a front guidance impeller and a rear guidance impeller; a taper-shaped or axial permanent magnet bearing is respectively formed by a first permanent magnet (9) and a right permanent magnet ring (14) as well as a second permanent magnet (19) and a left permanent magnet ring (18) to realize the purpose that the rotor axially supports in a suspension mode; a torque coil (5) and a suspension coil (7) are respectively wound on a motor stator (6); and with a certain decoupling control algorithm, the motor stator not only generates torque force but also generates radial suspension support force. In the compact axial-flow magnetic-levitation artificial heart pump, the rotor is supported by permanent magnetic force and electromagnetic force, and the compact axial-flow magnetic-levitation artificial heart pump has the advantages of small damage on blood, less radiation, compact structure and the like, is easy to transplant, is suitable for patients suffering from cardiac function failure, heart diseases and the like and can be used for ventricular assisting for a long time or a short time.

A regulatable supporter is composed of top plate, top seat, ball hinge, screw piles, locking nuts, base of screw pile, locking screw and base, and can be regulated vertically and horizontally in stepless mode. Its advantages are less compression and high precision.

The invention provides an intelligent track-changeable rail guided vehicle and an automatic warehouse and relates to the technical field of warehouse logistics. The automatic warehouse comprises a goods shelf, a stacking machine, a guide rail, a package collection device and the intelligent track-changeable rail guided vehicle. The intelligent track-changeable rail guided vehicle comprises a vehicle body, a plurality of rolling devices, a dumping device and an electronic control device. The dumping device comprises a bearing plate and a hydraulic component, one side of the bearing plate is hinge to the vehicle body, and the hydraulic component is connected with the bearing plate. Each rolling device comprises two guide rail idler wheels, a telescopic component and two abutting idler wheels, the telescopic component is arranged in the vehicle body, the two guide rail idler wheels are arranged on the two sides of the vehicle body and connected with the two ends of the telescopic component, each abutting idler wheel is connected with one side, away from the telescopic component, of the corresponding guide rail idler wheel. Compared with the prior art, the intelligent track-changeable rail guided vehicle can achieve turning driving, the advancing direction is diverse, meanwhile, the speed does not need to be reduced, and the package transporting efficiency is improved.

The invention provides a washing method for washing machines, as well as a washing machine thereof. The washing method is characterized in that while a stirrer rotates during wash, a drainage pump pumps washing water out from a water storage bucket and jets the washing water upwards through a hollow stirrer shaft and a hollow core hole of the stirrer so as to lift washed clothes. During wash, as the drainage pump pumps the high-pressure water out from the hollow stirrer shaft and the hollow core hole of the stirrer so as to spray and lift the washed clothes, the washed clothes are effectively prevented from receiving the long-term wear of a stirrer vane, and the washed clothes are allowed to receive the wash and rinse of high-pressure water flow, the stir of the stirrer and the wash in various washing forms at the same time. The invention has the advantages of low wear, low intertwining, low noise, high cleaning rate, high washing efficiency and the like.

This invention relates to a double drive compound flow washing machine, which comprises the following parts: plane frame elements, water barrel upper ring, water barrel 9, water barrel cover 56, case elements 10, washing and drying barrel 11, balance ring 55, bottom socket 31, central socket 44, upper cover elements 61, ring elements 76, water in device, level control device, first and second washing drive flow generating device; control device, drainage device and safety protection device. When the machine works, the first flow generating device wheel generates front and back alternating plane flows and the second flow device generates upper flow to generate strong three dimension flow to peel off dirt form clothing and to hold the clothing up.

The invention relates to a plate supporting device on plate processing equipment, which comprises a retainer block, a mounting seat and an elastic supporting mechanism of the retainer block, wherein the mounting seat is fixedly connected with a lower mold on a machine body worktable, and the retainer block is connected with the mounting seat through the elastic supporting mechanism; and the top surface of the retainer block is slightly higher than the top surface of the lower mold. The existing machine tool has not the device, so that the larger friction between the plate and the lower mold when the plate moves in the production process can damage the surface of the lower mold and the surface of the plate. The devices of the invention are arranged at the two ends of the lower mold on the travel path of the plate, and the retainer blocks at the two ends can support the plate so as to prevent the direct friction between the plate and the lower mold. In order to prevent too large or unequal distance between the plate and the lower mold from causing processing errors, the supporting device is also provided with the elastic supporting mechanism which can adjust the height of the retainer block and has adjusting function, and the reasonable distance can be kept. The invention reduces the friction between the plate and the lower mold and prolongs the service life of the lower mold.

The invention discloses hollow green brick pressing equipment. The hollow green brick pressing equipment comprises a base, wherein a machine enclosure and a transport unit are fixedly connected on the top of the base from left to right in sequence; the right side of the bottom of the inner cavity of the machine enclosure is fixedly connected with a protective shell; the right side of the bottom of the inner cavity of the protective shell is fixedly connected with a motor box; the inner cavity of the motor box is fixedly connected with a motor; and the output end of the motor is sleeved by a drive bevel gear. According to the hollow green brick pressing equipment disclosed by the invention, the base, the machine enclosure, a partition, the protective shell, a rotary shaft, the motor, the transport unit, a threaded rod, a threaded sleeve, a fixed rod, a pushing plate, a first telescopic pole, a stand column, a top plate, a second telescopic pole, a third telescopic pole, a pressure plate, a mould, a first through hole, a second through hole, a connecting plate, the drive bevel gear, a driven bevel gear, a slide rod and a supporting rod are arranged, so that the problem that existing hollow green brick pressing equipment wastes labor is solved. The hollow green brick pressing equipment has the advantage of saving labor power, and is convenient for use of a user.

The invention relates to a part temperature control device for grinding processing. In a grinding quench hardening processing course, the change of the surface temperature of a part directly affects the quality of a heat-treated layer on the surface of the part. A high-temperature heat pipe is a good device for controlling heat transfer; in order to keep the temperature change of the part in the grinding quench hardening processing course low, the high-temperature heat pipe comes into contact with a part to be ground; the surface temperature of the part is detected in real time during grinding processing by means of an infrared radiation thermodetector; the contact area of the high-temperature heat pipe with a connection block and a thermal conductive adhesive is adjusted by driving a transmission structure unit using a PID (Proportion Integration Differentiation) controller, so that thermal contact resistance is reduced to transfer excessive heat outwards; therefore, the surface temperature of the part is adjusted, the requirement of controlling surface quenching is met, and technical support and foundation are provided for realizing automatic control of grinding process; and theapplication of the device may produce excellent economic and social benefits.

The invention discloses a residual stress measurement system through a hole-drilling method, and belongs to the technical field of material processing and experimental stress analysis. The system comprises two parts: a drilling device and stress calculation software. The drilling device is formed by a speed-adjustable electric hand drill, a tool microscope, a drill rod, a guide cylinder and a magnetic support base and the like; and the calculation software is programmed through C language, and can give residual stress in an assigned direction, or principal stress and included angle in real time. Since a drilling guide device adopts an embedded ball bearing mode, an rotary friction effect of the drill rod is totally prevented; since the support adopts permanent magnetic bases and lock nuts each having a breach, site positioning and fillet weld stress measurement are realized greatly; and since the calculation program takes features of change of hole edge plastic deformation and processing strain with the stress value into consideration, a stress calculation formula of any two vertical directions is given to enable welding residual stress measurement to become much easier and accurate.

The invention provides a method for constructing preformed holes on a concrete floor slab of a dustless factory building. The method can be carried out in the way of precasting the concrete floor slab having preformed holes in advance at a construction site other than the scheduled site for a building, then moving the concrete floor slab to the field of the scheduled site for a building to assemble, or the method can also be carried out in the way of directly constructing the concrete floor slab having preformed holes on site at the scheduled position of the floor slab of a building. The method comprises the steps of (1) fixing a fixing unit on a template, (2) sleeving a casing pipe on the fixing unit, (3) sleeving an underlay component above the casing pipe, (4) grouting the underlay component to form the floor slab, and (5) sleeving a cover plate above the underlay component, wherein the cover plate is used as a floor face of the concrete floor slab of a building.

The invention discloses a solenoid valve structure based on cleaning tail gas, which includes a valve body and a valve cover that are matched, an air inlet and an air outlet are opened on the valve body, and the air inlet and the air outlet are connected through an air passage. , the upper part of the bonnet is equipped with an electromagnet assembly, the electromagnet assembly includes a shell, a coil support, a coil wound on the coil support, a sleeve assembled in the center of the coil support, a moving iron core that can move up and down in the sleeve, and a moving iron core fixed on the sleeve. The static iron core at the upper end of the tube, a magnetic isolation sheet is arranged between the static iron core and the moving iron core, a wear-resistant sleeve is arranged between the outer periphery of the moving iron core and the inner wall of the casing, and the lower end of the moving iron core and the The gas passages are matched; the bottom of the valve body is provided with a heating plate. The invention has the advantages of simple structure, long service life and good tail gas treatment effect.

The invention discloses a proportional electromagnetic valve used for treating tail gas through solid ammonia. The proportional electromagnetic valve comprises a valve body. The valve body is provided with a fluid inlet and a fluid outlet which communicate with each other through a fluid channel. An electromagnet assembly is assembled at the upper portion of the valve body and comprises a shell, a coil support, a coil wound around the coil support, a sleeve assembled in the center of the coil support, a movable iron core capable of vertically moving in the sleeve, and a fixed iron core fixed to the upper end of the sleeve. The lower end of the movable iron core is matched with the fluid channel. At least one abrasion resisting ring is embedded in the periphery of the movable iron core. A manual rod capable of manually adjusting the vertical installing position is arranged in the center of the fixed iron core. A spring is arranged between the lower end of the manual rod and the upper end of the movable iron core, and a magnetism isolation ring is arranged between the fixed iron core and the movable iron core. The proportional electromagnetic valve has the beneficial effects that the structure is simple, the service life is long, and the open point of the electromagnetic valve can be adjusted.

The invention discloses a locking device which is convenient for users to use, which comprises a mounting plate, both sides of the top of the mounting plate are fixedly connected with support rods, and the top of the support rod is fixedly connected with a fixing plate, and the fixing plate An opening is opened on the left side of the top, a through hole is opened on the right side of the inner wall of the opening, a clamping rod is movably connected to the right side of the fixing plate, and the end of the clamping rod away from the fixing plate passes through the opening and extends to the fixing plate bottom of. The present invention solves the problem by arranging mounting plate, fixed plate, movable block, chute, supporting rod, clamping rod, locking teeth, clamping block, supporting block, opening, positioning plate, slide bar, through hole, spring and connecting rod. Some locking devices are inconvenient for users to use. The user-friendly locking device has the advantage of being convenient for users, saves the working time of users, improves the work efficiency of users, and is worth popularizing.

The invention discloses a vertical combined high-efficiency desulphurization deamination dust collector. Two separation plates are arranged up and down in a shell, the internal space of the shell is divided into an upper diversion chamber, a middle secondary venture dust removal chamber and a lower primary cyclone dust removal chamber. An air inlet is arranged at the left side of the lower part of the lower primary cyclone dust removal chamber in the side wall tangential direction. A drain outlet A is arranged at the bottom. A drain outlet B is arranged outside the side wall connected with the separation plate at the lower part of the right side of the middle secondary venture dust removal chamber. A gas outlet is arranged at the left and upper side wall. A diversion pipe and a venturi dust removal pipe are arranged in the middle secondary venture dust removal chamber. An atomization nozzle A is arranged at the top of the lower primary cyclone dust removal chamber. An atomization nozzle B is arranged at the upper end of the venturi dust removal pipe. The device integrates cyclone, water film and venturi dust removal mechanisms, can achieve desulphurization deamination dust removal and purification at the same time, the dust removal effect can reach more than 98%, the dust collector employs vertical design, the structure is compact, and the service life is long.

The invention discloses paste mill millstone. It includes rolling millstone set on paste mill main shaft and fixed millstone set in shell body and cooperated with the rolling millstone. The rolling and fixed millstone are set concentric circle shield dam. One there and back shear zone is set between each two of the concentric circle shield dams. Each of the millstones is set more than four concentric circles there and back shear zones. The concentric circle there and back shear zone of the rolling and fixed millstone are alternated. Single shear zone is set between the neighbor concentric circle shield dams. Tooth space depth and single shear zone are both gradually diminished with the semi-diameter increasing. The bottom of tooth space of the first grinding teeth closed to circle center on rolling millstone is steep incline. Tooth shape is commutating tooth. The invention is used in paste mill millstone which can reduce energy consumption, and increase grinding pulp quality and yield but with simple structure.

The invention relates to a hole-enlarging deforming device and method for a metal pipe fitting.The device comprises the metal pipe fitting, an expanding support and an expanding die and further comprises an elastic die sleeve placed in the metal pipe fitting. The internal diameter of the elastic die sleeve is in clearance fit with the external diameter of the expanding die. The method comprises following steps: firstly, installing the elastic die sleeve into the metal pipe fitting such that internal diameter of the elastic die sleeve is in clearance fit with the external diameter of the expanding die; secondly, installing the expanding support to a punch press and applying expanding pressure to the expanding die such that a calibrating strap penetrates through the elastic die sleeve and performs expanding operation, and taking down the metal pipe fitting after finishing the above steps. The method helps to avoid direct friction between the metal pipe fitting and the expanding die such that quality of an inner surface of the metal pipe fitting and size precision of the metal pipe fitting after expansion are improved. Therefore, abrasion of the expanding die is effectively reduced and durability of the expanding die is improved. The method can be extensively applied to expanding deforming of the metal pipe fitting, and process-molding of conical pipes for flow instruments in chemical and petroleum fields.

The present invention relates to a front shock absorber for three-wheeled motorcycle and comprises a shock absorber tube (2), a shock absorber column (13) and a joint (1). The shock absorber column is arranged in the shock absorber tube and is connected to the joint of the shock absorber tube through a guide rod (3) and the shock absorber tube (2) is molded by stretching high-precision cold-drawn steel tube or cold-drawn steel tube, with large carrying capacity, high impact resistance and reduction of manufacturing cost; a guide sleeve (4) on the upper end of the guide rod and a guide sleeve (9) of the internal cavity of an expanding body on the upper end of the shock absorber tube are powder metallurgy sleeve or engineering plastic sleeve, with good wear resistance and long service life; the lower end of the shock absorber column is provided with one or more sections of composite sleeves (6), and the composite sleeve is copper-based or oil-free bearing or powder metallurgy sleeve, avoiding direction friction between the shock absorber column and the shock absorber tube; the two guide sleeves and the composite sleeve support the shock absorber column commonly so that the shock absorber column can do linear reciprocating motion, with the function of guidance and protection and greatly reduction of friction coefficient. The shock absorber has the advantages of low cost, wear-resistant, low noise and good corrosion resistance.

The invention discloses a healthy bra capable of preventing breast cancer, comprising cup bodies and flanks, wherein, each cup body is provided with a steel ring, the shape of which is adaptive to the breast shape of the human body; the steel ring is embedded in the cup body; and a silica gel package layer is arranged outside the steel ring. In the invention, the steel ring is packaged by utilizing the soft silica gel, and the steel ring is internally arranged in the breast, so as to change the stiff curved support of the steel ring, and form the support of soft curved surface of the steel ring, thus the breast can not be reined and pressed by the steel ring of the bra, thereby balancing the stress of the breast, enhancing the blood circulation, avoiding the tissue necrosis caused by hypoxia, and preventing breast hyperplasia and canceration.

The invention relates to a movable type sick and wounded person first-aid and transfer device, which comprises a sick and wounded person first-aid carrying device, a first-aid medicine and apparatus integration device and a transfer support device, wherein the sick and wounded person first-aid carrying device is arranged on the transfer support device, and the first-aid medicine and apparatus integration device is arranged under the sick and wounded person first-aid carrying device, and is positioned above the transfer support device. The device has the advantages that by arranging the transfer support device, the quick transfer is realized in the space with multiple threshold obstacles (such as a ship cabin passage); the sick and wounded person first-aid carrying device (comprising a slide device, a containing box, an oxygen cylinder and the like) and the transfer support device can be quickly separated to independently realize the transfer function, especially for the quick transfer in steep and slit spaces of stairs and the like, the integrated emergency medicine and apparatus integration device can be used for monitoring the vital signs of a sick and wounded person in the first-aid and transfer process, the necessary vital support is guaranteed to be provided for the sick and wounded person in the transfer process, and the precious time for rescuing the sick and wounded person is saved.

The invention discloses a conveying belt type woodworking thickness planer, relates to a woodworking thickness planer, and specifically relates to a structural improvement of a thickness planer feeding mode. The woodworking thickness planer includes a working table (1); a slicing mechanism (2) and a material pressing device (3) are arranged above the working table (1); the working table (1) is provided with a belt type conveying device; the belt type conveying device comprises a driving roller (4), a driven roller (5), a conveying belt (6) and a driving mechanism (7); the driving roller (4) and the driven roller (5) are respectively and transversely fixed on two ends of the working table (1); the conveying belt (6) is sheathed on the periphery of the driving roller (4), the driven roller (5) and the working platform (1), and the bottom face of the inner side of the conveying belt (6) is closely attached to the upper surface of the working table (1); the driving roller (4) is connected with the driving mechanism (7). The conveying belt type woodworking thickness planer has the advantages of fast feeding speed, smooth and steady working, high production efficiency, smooth processed surface, and high degree of finish.

The invention discloses an online diagnosis device and method for a large-scale rotating machinery equipment peaking-shaft system. The device comprises a supervision instrument TSI system installed a large-scale rotating machinery equipment site, the supervision instrument TSI system is provided with a plurality of paired eddy-current sensors, and each paired eddy-current sensor transmits vibration information of the main shaft of large-scale rotating machinery equipment to the supervision instrument TSI system; the supervision instrument TSI system transmits the vibration information to an acquisition device, and the acquisition device calculates to acquire the accurate position of the main shaft through the vibration information and transmits the accurate position of the main shaft to a DEH control system; meanwhile, the DEH control system receives signals from a peaking-shaft oil pump starter relay; the DEH control system performs difference calculation between the accurate positions of two times on the signals received from the peaking-shaft oil pump starter relay to acquire height of the main shaft being raised, and online diagnosis is realized. The online diagnosis device and method has the advantages that safety running of the equipment is improved, and working load and working intensity of operators and maintenance personnel are reduced.

The invention relates to a part assembly table, in particular to a jacking rotary table. The jacking rotary table comprises a worktable, a rotating cylinder, a locking device, a rotating supporting seat, a locking cylinder, a jacking cylinder, a bracket and a box; the locking cylinder and the jacking cylinder are mounted on the bracket; the box is connected with a piston rod of the jacking cylinder; the rotating cylinder is mounted in the box; the worktable is positioned above the box, is driven to rotate by the rotating cylinder, and is driven to lift through the jacking cylinder along with the box; the rotating supporting seat is positioned below the box, and is driven to rotate by the locking cylinder; and the rotating supporting seat is provided with the locking device used for locking the box and the worktable for preventing the box and the worktable from falling. The jacking rotary table integrates jacking, rotation and locking, uses the cylinders as power elements, can overcome such defects as unstable jacking table, complex structure, large occupied space and difficult debugging, finishes all actions of the whole table, increases the reliability of the table, and improves the assembly efficiency on a vehicle engine production line.

The invention relates to an omega-shaped artificial cervical disc implantation prosthesis with inverted-V-shaped two-way stopping inverted teeth. The omega-shaped artificial cervical disc implantation prosthesis with the inverted-V-shaped two-way stopping inverted teeth comprises a body and is characterized in that the body is an omega-shaped non-contacting elastic structure with integral upper and lower end plates, the outer surfaces of the upper end plate and the lower end plate are provided with the inverted-V-shaped two-way stopping inverted teeth in a symmetrical mode, the length of the lower end plate of the body is 10-16mm, the length of the upper end plate is 1 mm shorter than that of the lower end plate, the distance between the upper end plate and the lower end plate is 2-3.5 mm, and the thickness of the bending section of the back end of the body is 0.6-1.2 mm. The omega-shaped artificial cervical disc implantation prosthesis with the inverted-V-shaped two-way stopping inverted teeth is stable in space after being implanted, is supported by elastic force and does not need to be fixed with screws, avoids direct friction and abrasion between the upper end plate and the lower end plate fundamentally, and can meet the performance requirements of long service life and anti-fatigue effect of an implantation prosthesis. By means of the omega-shaped artificial cervical disc implantation prosthesis with the inverted-V-shaped two-way stopping inverted teeth, the range of motion of the anteflexion and the range of motion of the lateroflexion of a cervical vertebra segment reaches 30%-60% of the range of motion of the anteflexion and the range of motion of a normal cervical vertebra after a patient is subjected to operation, and the range of motion of the posterior extension reaches 70%-80% of the range of motion of the posterior extension of the normal cervical vertebra.

The invention relates to hemorrhoid treatment equipment for a general surgery department, which is characterized by comprising an equipment main body and a medicine applying layer, wherein the equipment main body has a size matched from the human rectal ampulla to external anus; the equipment main body is provided with a rectal end part, a middle part and an anal pecten sinking part in sequence from the top end; the top of the rectal end part is of a ball structure; the rectal end part, the middle part and the anal pecten sinking part are of an integrated structure; the medicine applying layer is arranged outside the equipment main body; and a lower end joint is arranged at the lower end of the anal pecten sinking part. The hemorrhoid treatment equipment provided by the invention can retract hemorrhoids, accelerate anal pecten movement, massage internal hemorrhoid regions of patients as well as accelerate absorption of medicines on the medicine applying layer; the medicine layer also can prevent ball vibrators from directly rubbing the internal hemorrhoid regions of the patients so as to play a certain role in excessive buffering; and the treatment equipment directly acts on the internal anus, is noninvasive and can effectively relieve symptoms.

The invention provides an automatic tension wheel, pertaining to the mechanical technology field. The automatic tension wheel solves the problems in the existing automatic tension wheel that the ordinary torsion spring is adopted with low maximum tension strength and narrow application range. The automatic tension wheel comprises a belt wheel and a bracket, wherein, the belt wheel is connected with one end of the bracket and the other end of the bracket is provided with a connection shaft; the bracket is sheathed outside the connection shaft and can swing relatively to the connection shaft; the periphery of the connection shaft is provided with a lower end cover which covers the connection shaft and the connection shaft is fixed inside the lower end cover; the lower end cover is internally provided with the torsion spring one end of which is fixed on the bracket and the other end of which is fixed on the lower end cover. The automatic tension wheel has the advantages of large tension strength, large range of rotation angle when tensing, long service life, etc.

The invention discloses an energy-saving and environmental-protecting type air suction tube assembly of a split type refrigeration evaporator. The energy-saving and environmental-protecting type air suction tube assembly comprises an air suction tube part, an air return tube part and a liquid accumulating device. The air suction tube part comprises an air suction tube I, an air suction tube II and a transitional tube. The air suction tube I comprises an aluminum connecting tube I, a copper connector I and a copper connector II, wherein the copper connector I and the copper connector II are fixedly connected with the two ends of the aluminum connecting tube I in a sealed mode correspondingly. The air suction tube II comprises an aluminum connecting tube II and a copper connection III which is fixedly connected with one end of the aluminum connecting tube II in a sealed mode. The other end of the aluminum connecting tube II is connected with the liquid accumulating device. The air return tube part comprises a tube body, a copper tube and a capillary tube, wherein the copper tube is fixedly connected with one end of the tube body in a sealed mode and inserted into the other end of the liquid accumulating device in a sealed connection mode. One end of the capillary tube is fixedly connected with the transitional tube in the air suction tube part. The capillary tube is attached to the whole outer wall of the tube body of the air return tube part in the length direction. At one end of the tube body of the air return tube part, the capillary tube is wound on the tube body of the air return tube part. The energy-saving and environmental-protecting type air suction tube assembly of the split type refrigeration evaporator is high in shakeproof capacity, high in heat exchange efficiency, obvious in energy saving effect and capable of effectively improving the efficiency of a compressor of a refrigerator.

The invention discloses a spinning yarn bobbin with the long service life. The spinning yarn bobbin comprises a top disc, a bottom disc and a bobbin body. The bobbin body is cylindrical and comprises a bobbin outer wall and a bobbin inner wall. Transition faces are arranged at the two ends of the bobbin outer wall, and the surfaces of the transition faces are of an arc downward-concave structure. A cylindrical hollow cavity is formed in the bobbin inner wall, and a plurality of protruding rings are linearly arranged on the surface of the bobbin outer wall in the horizontal direction. Ball grooves are symmetrically formed in the inner side of the bobbin inner wall, and balls are arranged in the ball grooves and clamped in the ball grooves. Holes with the diameters being smaller than those of the ball grooves are formed in the positions, corresponding to the ball grooves, of the bobbin inner wall.According to the spinning yarn bobbin, the ball grooves with the balls are formed in the bobbin inner wall, so that the yarn bobbin is more balanced in rotation, direction friction of the bobbin inner wall and a rotating shaft is avoided, friction damage of the yarn bobbin is avoided, and the service life of the yarn bobbin is prolonged; the bobbin body is connected with the top disc and the bottom disc through pipe fittings, and the yarn bobbin can be conveniently dismounted and replaced.

The invention discloses a pair of leather shoes and a production method thereof. Sole comprises a bottom layer and a leather upper layer, wherein, the sole is provided with a sole water-proof structure at the foot palm part, the position at the foot palm part on the sole, which contacts with ground, is provided with an elastic abrasion resistant structure, and the vamp is provided with a vamp water-proof deformation-proof structure; the sole water-proof structure is provided with a sole water-proof layer, the sole water-proof layer is arranged between the bottom layer and the leather upper layer at the foot palm part, and the bottom layer, the leather upper layer and the sole water-proof layer form an integral structure sole; the elastic abrasion resistant structure is provided with a post pad hole and a post pad, wherein, the post pad hole is arranged on the bottom layer, and the post pad is arranged and filled in the post pad hole; the projecting part of the post pad is projected on the bottom layer and is connected with the lower bottom surface of the bottom layer; the end surface of the post pad penetrating through the bottom layer forms an integral structure with the sole water-proof layer. The production method of the leather shoes comprises: preparing a sole, preparing a heel, preparing a heel pad, preparing a vamp and combining, assembling and processing the leather shoes. The leather shoes of the invention have the characteristics of beautiful and elegant appearance, softness, comfort, water prevention, abrasion resistance and no deformation.