43results about How to "Eliminate assembly gaps" patented technology

The invention discloses a porous static pressure gas radial bearing based on piezoelectric shunt damping, and belongs to the technical field of static pressure gas bearings. Comprising a bearing shell, a bearing sleeve and a porous throttler which are arranged in the bearing shell in the axial direction, and a piezoelectric shunt damping module which is arranged between the bearing shell and the bearing sleeve and is axially fixed through a check ring. Wherein the piezoelectric shunt damping module is formed by connecting a force amplifier, a piezoelectric ceramic stack, a pre-tightening pressing block, a pre-tightening screw, a steel ball and a locking nut; the force amplifier is of an axisymmetric structure composed of two trapezoidal connectors, four thin-wall beams and two end plates. The piezoelectric shunt damping module is arranged in the bearing, vibration mechanical energy of the bearing sleeve is converted into electric energy through the piezoelectric ceramic stack, and net damping is provided for the bearing by consuming the electric energy generated by the piezoelectric ceramic stack through the external shunt resonance circuit, so that the amplitude of the rotor relative to the bearing at a high rotating speed is reduced; the high-speed stability of the bearing is improved.

The invention relates to the field of LED display screen installation and splicing, and discloses an arc-shaped lock capable of adjusting an LED display screen box gap, the arc-shaped lock comprises a first lock seat and a second lock seat, the inner side of the first lock seat is in sliding connection with a first lock cylinder, the inner side of the second lock seat is in sliding connection with a second lock cylinder, the middle of the first lock cylinder is provided with a locking assembly, and the locking assembly is arranged on the inner side of the second lock seat. A fixing assembly is fixedly installed on the side face of the first lock cylinder, the locking assembly comprises a clamping column, the clamping column is arranged in the middle of the first lock cylinder and the middle of the second lock cylinder, a sliding groove is formed in the clamping column, and a pin is slidably connected into the sliding groove. The clamping blocks are opened to be clamped into the annular groove in the second lock cylinder, and internal buckling and axial limiting of the two lock cylinders are achieved. And in cooperation with a screwing structure of the nut and the external thread of the clamping column, continuous axial pressing force can be applied to the surface of the lock cylinder, and the flatness of the splicing face of the LED display screen and the stability of the overall structure are ensured.

The utility model discloses an electronic equipment bottom shell and electronic equipment, electronic equipment bottom shell is equipped with integrated forming piece and includes rear cover and middle frame, and the inside round corner and the outside round corner are separately arranged on the inside and outside of electronic equipment bottom shell, and the inside round corner and the outside round corner all are bent and extend from the rear cover to the middle frame to form the bending corner part, and the radius of the inside round corner is greater than or equal to 3mm, and the radius of the outside round corner is less than or equal to 1.5mm, so that the material quality is unified, and there is no touch jump when holding, and the assembly gap between the rear cover and the middle frame is eliminated, and at the same time, the outside round corner adopts the small R angle with the radius of the arc less than or equal to 1.5mm, so that the outside corner of the rear cover and the middle frame is close to the right angle to ensure the appearance simplicity, and the inside round corner adopts the big R angle with the radius of the arc greater than or equal to 3mm, so that the corner thickness of the rear cover and the middle frame is improved, the impact resistance is improved, the breaking phenomenon when falling is avoided, and the inside round corner also plays the role of facilitating processing.

The utility model belongs to aluminum block seamless connection technical field especially, it is a kind of seamless connection mechanism of aluminum briquetting, including aluminum sheet, the aluminum sheet is connected by multiple aluminum blocks in horizontal direction, the periphery of aluminum block is provided with connecting assembly, and aluminum sheet is carried out horizontal seamless clamping by connecting assembly;The both sides of aluminum sheet are provided with clamping assembly.The connecting assembly is set in the application, the horizontal insertion connection of adjacent two aluminum blocks is carried out, then multiple horizontal insertion aluminum blocks are inserted into the matching convex plate and matching recessed plate of both sides vertically, and insertion rod is inserted into the inner wall of sliding slot, the overall aluminum sheet is further fixed, the aluminum block in aluminum sheet is assembled and replaced conveniently, and maintenance cost is reduced, the clamping assembly is set, the spring is elastically installed between limiting ring and the limiting block adjacent thereto, the limiting block is extruded inward, thereby the connection accuracy of aluminum block vertical direction is improved.

The utility model discloses an assembly tool for a vacuum arc extinguish chamber assembly of a pole-mounted circuit breaker, and belongs to the field of pole-mounted circuit breakers, the assembly tool comprises a base, a positioning assembly, a supporting assembly, a limiting assembly and a push-pull assembly, the positioning assembly is arranged on the base, the supporting assembly and the positioning assembly are correspondingly arranged at an interval, the limiting assembly is arranged on the push-pull assembly, and the push-pull assembly is arranged on the base. And the push-pull assembly is used for driving the vacuum arc-extinguishing chamber assembly to extend into or retreat from the insulating part. According to the utility model, the push-and-pull assembly drives the vacuum arc-extinguishing chamber assembly to extend into the conical inner cavity of the insulating part, and a worker does not need to push and pull the vacuum arc-extinguishing chamber assembly manually, so that the labor intensity of the worker is reduced, time and labor are saved, and the assembly efficiency is improved; through the supporting assembly, the vacuum arc-extinguishing chamber assembly and the insulating part automatically keep coaxial alignment, so that time waste caused by repeated adjustment of the vacuum arc-extinguishing chamber assembly is avoided, deformation and damage of the silicone rubber sealing sleeve caused by local compression are prevented, and the assembly tightness is ensured.

The present invention belongs to the technical field of prefabricated building assembly construction, and specifically relates to a prefabricated beam waterproof connection structure, which is used to connect the main beam and the auxiliary beam, and includes: a slot, which is pre-buried in the side wall of the main beam; a slide, which is pre-buried at the end of the auxiliary beam; a plug plate, which is slidably arranged in the slide along the length direction of the auxiliary beam; a pre-support member, which is pre-buried at the upper edge of the end of the auxiliary beam and protrudes from the end face of the auxiliary beam, the pre-support member is used to overlap the top edge of the main beam, and a water stop strip is provided on the bottom surface of the pre-support member; a driving mechanism is installed on the auxiliary beam, and the driving mechanism is used to drive the plug plate to slide so that one end of the plug plate is inserted into the slot. The prefabricated beam waterproof connection structure provided by the present invention can realize the support-free connection between the auxiliary beam and the main beam, the pre-support member on the auxiliary beam overlaps the main beam, and a water stop strip is provided between the auxiliary beam and the main beam, which eliminates the assembly gap between the main beam and the auxiliary beam and improves the waterproof performance.

This invention discloses a high-precision dual-purpose adhesive film production device for both forward and reverse coating, comprising a frame, a linear guide rail mounted on top of the frame, and a roller seat drive assembly on the outer side of the frame. The roller seat drive assembly includes a forward coating roller seat and a reverse coating roller seat slidably connected to the outer side of the linear guide rail. A forward coating heating roller is mounted on the forward coating roller seat, and a forward coating scraper is mounted on top of the forward coating heating roller. A reverse coating heating roller is mounted on the reverse coating roller seat. This invention employs a dual-roller seat independent drive combined with a linear guide rail structure, ensuring smooth and skew-free roller movement, fundamentally avoiding the roller slippage problem that occurs during adjustment in traditional equipment. The dual heating rollers allow for functional interchangeability, enabling quick switching between forward and reverse coating modes. The integrated limit, gap adjustment, and gap elimination structures significantly improve the accuracy of adhesive gap control and operational stability, meeting the requirements of high-precision adhesive film production.

The utility model discloses a connecting structure of motorcycle oil tank, it includes the casing, the lower extreme of casing is provided with the limit component, the limit component includes the two sliding slots of opening in the lower extreme of casing, the inside sliding connection of sliding slot has the connecting block, the lower extreme fixed connection of connecting block has the limit board, the limit board inner wall is provided with the installation slot, the inner wall fixed connection of installation slot has the friction pad. Through above -mentioned structure can effectively eliminate the assembly gap between oil tank and frame installation space, prevent the transverse movement of the vehicle driving because of vibration. The stable clamping force can be maintained when using for a long time, avoid the problem of fuel leakage caused by the decline of fuel pipe joint sealing performance, thread connection loosening, thereby.

The invention relates to the technical field of mining machinery and coal dressing equipment, and particularly discloses a detachable wear-resistant lining plate of a dense medium shallow slot sorting machine and a machining process of the detachable wear-resistant lining plate. Comprising a metal base plate and a wear-resistant working layer, a dovetail groove is formed in the metal base plate, a dovetail joint is fixedly connected to the outer portion of the wear-resistant working layer, the wear-resistant working layer is composed of wear-resistant block units, locking wedge blocks are fixedly connected to the outer portions of the wear-resistant block units, and lateral grooves are formed in the locking wedge blocks; the preparation method of the wear-resistant lining plate comprises the following steps: S1, machining the metal substrate; s2, the weighed raw materials are smelted; s3, casting the wear-resistant alloy melt into a casting mold; s4, cooling and demolding; s5, carrying out heat treatment and machining on the green body; and S6, the wear-resistant block units are installed on the metal substrate. The wear-resistant lining plate can be used for easy-to-wear parts of mining machinery such as a dense medium shallow slot sorting machine, and has the advantages of stable structure and high maintenance efficiency.

The utility model belongs to the technical field of electronic atomization equipment, and provides an atomizer which comprises a shell, an atomization core and an adjusting part, a partition plate is arranged in the shell, and the interior of the shell is divided into a liquid storage cavity and a ventilation cavity by the partition plate; the shell is further provided with an output pipeline and an air vent which are communicated with the outside, the output pipeline extends into the liquid storage cavity, and the air vent in the shell is communicated with the air exchange cavity; the atomizing core is arranged in the liquid storage cavity and is connected with the output pipeline; the atomizing core is used for heating the aerosol matrix in the liquid storage cavity during use and outputting the generated aerosol from the output pipeline, the adjusting part is used for adjusting the suction resistance during use, the adjusting part is arranged on the air vent of the shell, and a through hole matched with the air vent in an aligned mode is formed in the adjusting part. The utility model further provides an electronic atomization device with the atomizer. The electronic atomization device aims at solving the problems that in the prior art, an atomizer structure with a suction nozzle on an electronic atomization device has an assembly gap, dirt is prone to being accumulated on the gap and difficult to clean, and use is affected.

The invention discloses an air bag cover plate structure and a manufacturing method thereof, the air bag cover plate structure comprises a driver sign and a cover plate, the driver sign comprises a visual part and a fixed part, the visual part and the fixed part are located on different planes, and the fixed part is arranged around the circumferential direction of the visual part; the mark and the cover plate are integrally formed in an injection molding mode in an insert mode, the fixing part is locked in the cover plate through an injection molding material of the cover plate, and the visible part forms a visible area of the outer surface of the cover plate. According to the air bag cover plate structure, a traditional buckle assembly mode is replaced, the assembly gap between the driver sign and the cover plate is eliminated from the source, the surface difference problem caused by poor attachment of the driver sign and the cover plate is solved, and the appearance consistency and the visual quality of the outer surface of the air bag cover plate are greatly improved.

The invention discloses a sectional type tail door structure, a tail door assembling technology and a vehicle, the sectional type tail door structure comprises a tail door outer plate assembly, the tail door outer plate assembly comprises a tail door outer plate upper section, a tail door outer plate middle section and a tail door outer plate lower section, the upper portion of the tail door outer plate middle section is connected with the lower portion of the tail door outer plate upper section, and the tail door outer plate upper section is connected with the tail door outer plate middle section. The lower portion of the tail door outer plate middle section is connected with the upper portion of the tail door outer plate lower section, and the tail door outer plate middle section integrates the function of a tail lamp mask. According to the sectional type tail door structure, the requirement for injection molding equipment is lowered, the equipment investment is reduced, meanwhile, light weight is achieved, and the appearance attractiveness is improved. According to the tail door assembly process, the turnover frequency of materials can be reduced, the number of tools is reduced, and the occupied area of an assembly site is reduced. The vehicle disclosed by the invention comprises the sectional type tail door structure.

The utility model discloses a kind of negative ion module and air curtain device, and negative ion module includes mounting seat and negative ion generator;Mounting seat includes base and upper cover, base has the installation cavity with opening upward, upper cover is covered in the top opening of base, upper cover is protruded with limit structure to the side of installation cavity, limit structure is cooperated with the inner wall of installation cavity, to limit upper cover to separate from base;Negative ion generator is installed in installation cavity.The utility model's negative ion module, by the cooperation of limit structure and installation cavity inner wall, the firm connection of upper cover and base is realized, without using screw or buckle.This design simplifies assembly process, improves production efficiency.Due to the need for additional connecting piece, reduce material cost and warehousing management cost.Limit structure and the close cooperation of installation cavity inner wall eliminate assembly gap, effectively prevent the shaking or misplacement between upper cover and base.

This utility model discloses a driven sweeping blade clamping plate structure adaptable to the mounting holes of the middle frame, specifically relating to the field of air conditioning component technology. It includes a sweeping blade clamping plate and middle frame mounting holes. Multiple sweeping blades are mounted on the top of the sweeping blade clamping plate, and a sweeping blade reinforcing base plate is fixedly connected to the bottom of the clamping plate. Multiple connecting buckles are fixedly connected to the bottom of the reinforcing base plate, and a first adhesive plate is fixedly connected to the top of each connecting buckle. This utility model forms a closed support structure through the connecting buckles and the reinforcing base plate, eliminating stress concentration points at the gaps, improving the relatively soft characteristics of the PP material, making the buckles less prone to deformation or breakage under stress, and enhancing the fatigue resistance of the overall structure. During assembly, the first adhesive plate presses against the inner wall of the middle frame hole, generating axial locking force through elastic deformation, eliminating the assembly gap between the clamping plate and the middle frame, and preventing the clamping plate from loosening due to vibration during the sweeping process.

The utility model discloses a panel assembly and an air conditioner, the panel assembly comprises a first supporting platform, a decoration panel and an annular covered edge, and the decoration panel is arranged on the first supporting platform; the annular wrapping edge is arranged around the first supporting platform and matched with the first supporting platform to form a mounting space for mounting and fixing the decoration panel, and the annular wrapping edge is configured to be gradually shrunk until the annular wrapping edge is tightly attached to the decoration panel after the decoration panel is placed on the first supporting platform; according to the utility model, the decorative panel drives the annular covered edge to contract and then cling to the decorative panel, so that the assembly clearance of the panel assembly is eliminated, and the overall attractiveness of the panel is improved.

The invention relates to an assembly method of a dynamic balance test tool and the dynamic balance test tool thereof, and the assembly method of the dynamic balance test tool comprises the steps: machining an initial raw material to form a balance mandrel; wherein the outer diameter of the balance mandrel is gradually increased from one end to the other end, so that the two ends of the balance mandrel respectively form a small-diameter end and a large-diameter end; providing a to-be-tested part, wherein a through hole is formed in the to-be-tested part; the small-diameter end of the balance mandrel is inserted into the through hole, and the small-diameter end is in clearance fit with the through hole of the part to be tested, so that the balance mandrel is guided in without resistance; an insertion force F is continuously applied in the axial direction, so that the surface of the balance mandrel is attached to the part of the through hole, and axial displacement of the balance mandrel is stopped; and detecting the overall vibration amplitude of the balance mandrel and the to-be-tested part so as to verify the assembly stability and no additional unbalance between the balance mandrel and the to-be-tested part.

This utility model discloses a quick-change fixture for a knife grinding machine, comprising: an integrated tool holder with an assembly groove on it, wherein a knife is installed at the bottom of the cavity of the assembly groove; a downward positioning mechanism mounted on the knife; a mounting plate fixedly mounted on one side of the integrated tool holder; a rotary propulsion mechanism inserted into the top of the mounting plate; and a pressing mechanism connected to one end of the rotary propulsion mechanism. This utility model utilizes the combined arrangement of the downward positioning mechanism and the pressing mechanism, and by optimizing the fit between the pin and the center hole of the diamond blade, eliminates assembly gaps, ensuring consistent clamping positions each time, significantly improving the uniformity of blade dimensions after grinding. The linkage design of the elbow clamp and the connecting mechanism allows the downward positioning mechanism to clamp or release the knife simply by lifting and rotating the elbow clamp, greatly shortening the clamping time.

The present invention discloses a connection structure for a humanoid leg joint output end servo and a skeleton and a robot. The connection structure for a humanoid leg joint output end servo and a skeleton according to the present invention is characterized by comprising: a skeleton shell, an insert and a humanoid leg joint output end servo; wherein the insert is embedded in the skeleton shell; the outer contour of the insert is integrated with the skeleton shell, and the inner contour of the insert is matched with the output shaft of the humanoid leg joint output end servo.

The invention relates to the technical field of steel strand fatigue testing equipment, and particularly discloses a jaw-replaceable steel strand fatigue testing machine which comprises a rack and a pair of concave seats, the pair of concave seats are oppositely arranged in the rack, and first hydraulic oil cylinders are mounted on the two outer walls of each concave seat; first piston rods are arranged at the output ends of the first hydraulic cylinders; connecting plates are arranged at the ends of the first piston rods; a jaw plate is detachably mounted at the end part of the connecting plate; the end face of the jaw plate is provided with a limiting groove capable of being matched with the outer wall of the steel strand. A power mechanism and a connecting mechanism are arranged on the end faces, away from each other, of the pair of concave bases correspondingly. The power mechanism is connected with the top wall of the rack and can drive the concave base connected with the power mechanism to ascend and descend. The connecting mechanism is connected with the inner bottom wall of the rack; the assembling structure of the jaw plate and the connecting plate is arranged to be in an embedded and inserted mode, so that the jaw plate can be conveniently and rapidly assembled and disassembled, a worker can conveniently replace the corresponding jaw plate according to the to-be-tested steel strand, and the testing efficiency is improved.

The utility model discloses a kind of baking trays, it is related to kitchen utensil technical field, including baking tray body and lid assembly, baking tray body top is equipped with lid assembly, lid assembly includes silica gel layer and glass layer, silica gel layer is wrapped glass layer outer lateral wall and upper surface, silica gel layer side is fixed with sealing plug.The utility model provides the cooperation of trapezoidal section of silica gel sealing plug and baking tray clamping groove, sealing can be formed by folding insertion, without traditional buckle, bolt and the like connecting piece, avoid the sealing attenuation caused by the wear of part, after testing, internal air pressure difference can reach 2kPa when turning over baking tray, liquid leakage rate is 0%, far superior to the leakage probability of 15% of traditional buckle type baking tray, sealing plug and lid body are integrally formed, eliminate the assembly gap of split structure, cooperate the elastic deformation capacity of silica gel, the manufacturing tolerance within 0.5mm of baking tray edge can be adapted, improve sealing reliability.

The utility model discloses a cutting equipment with mother -daughter saw structure relates to woodworking machinery technical field, including work table, mother saw structure, daughter saw structure, dust collecting structure and guide structure. Mother saw structure realizes saw blade height double -mode adjustment through thread transmission and bevel gear engagement, and daughter saw structure passes through the cooperation of adjusting bolt and compression spring, and the coplanar precision with mother saw saw blade is ensured, and dust collecting structure's negative pressure pump and protection board groove are integrated in saw blade side, and real -time collection wood shavings, and guide structure adopts the design of damper bar and locking tooth, realizes cutting path dynamic adjustment and locking. The utility model has solved traditional equipment adjustment efficiency low, dust pollution is big, and the problem such as cutting precision deficiency.

This utility model discloses a valve ball assembly structure for a top-mounted high-temperature steam ball valve, including a valve ball body with a complete straight-hole flow channel, a split-type connecting assembly, a gap-eliminating fit structure, an axial fastening unit, a torque transmission unit, and a valve shaft. The split-type connecting assembly includes two detachable connecting discs, which respectively mate with the axial end faces of the valve ball body. The gap-eliminating fit structure is located at the contact interface between the connecting disc and the valve ball body to eliminate assembly gaps. The axial fastening unit passes through the connecting disc and the valve ball body to achieve axial locking. The torque transmission unit passes through the connecting disc and the valve ball body to achieve opening and closing torque transmission. The valve shaft mates with one of the connecting discs for the driven rotation of the valve ball body. In this structure, the upper and lower connecting discs and the valve ball, as well as the lower connecting disc and the valve shaft, all adopt conical surface mating to eliminate assembly gaps, ensuring the coaxiality of the valve ball assembly and improving structural performance.

The utility model discloses a printer with uniform gaps. The device comprises a main machine body and an upper cover, the upper cover is arranged at the upper end of the main machine body, the main machine body comprises a first cover body, a second cover body and a middle frame, the first cover body and the second cover body are connected to form a mounting cavity, the middle frame is arranged in the mounting cavity, and the middle frame is arranged in the mounting cavity. A first supporting part and a first elastic acting part are arranged between one side of the middle frame and the first cover body in a matched mode, the first elastic acting part is located below the first supporting part, and a second supporting part and a second elastic acting part are arranged between the other side of the middle frame and the second cover body in a matched mode. And the second elastic acting part is positioned below the second supporting part. The printer is applied to the technical field of printers.

The utility model discloses an electric appliance shell, which comprises a first shell, a second shell and a cavity formed by assembling the first shell and the second shell and used for accommodating an electric component, and an assembling gap of the first shell and the second shell is sealed by a sealing structure formed by matching the first shell and the second shell. The sealing structure comprises a first sealing rib and a first sealing groove which are arranged on the first shell, and a second sealing rib and a second sealing groove which are arranged on the second shell; the first sealing rib is matched with the second sealing groove in an inserted mode, and the first sealing groove is matched with the second sealing rib in an inserted mode; one side of the first sealing rib and one side of the second sealing rib are in interference fit to form a first side sealing part; the other side of the first sealing rib and the second sealing groove are in relative close contact through interference fit of the first sealing rib and the second sealing rib to form a second side sealing part. The other side of the second sealing rib is in relative close contact with the first sealing groove through the interference fit of the first sealing rib and the second sealing rib to form a third side sealing part; the first side sealing part is located between the second side sealing part and the third side sealing part. In addition, the utility model further discloses an electric appliance adopting the electric appliance shell.

The utility model provides a kind of embedded indoor unit of air conditioner, it includes shell, air deflector and first driving device.The lower part of the front side of shell is provided with air outlet.Air deflector is rotatably arranged at air outlet;Air deflector is provided with rotating hole.First driving device is arranged in shell, first driving device has rotating shaft assembly, rotating shaft assembly includes rotating part, elastic member, and telescopicly connected in rotating part, and with the synchronous rotation of rotating part telescopic shaft;Telescopic shaft is inserted into rotating hole, and drives air deflector to rotate;Elastic member is arranged between rotating part and telescopic shaft, and is configured to provide so that telescopic shaft inserts into the force of rotating hole.The utility model solves the technical problem that rotating shaft and air deflector rotating hole assembly are difficult in the prior art, to improve the purpose of embedded indoor unit of air conditioner assembly efficiency.

The utility model provides a kind of rotary base for mechanical arm belongs to mechanical arm technical field.It solves the problem of insufficient stability of base in prior art.The base shell is hollow arc-shaped disc structure, first limit slot and second limit slot are provided on the surface of base shell, first limit slot and second limit slot are distributed in spaced circumferential array and first limit slot and second limit slot are respectively provided with first limit hole and second limit hole, connecting bottom plate is arranged at the inner bottom end of base shell, first extension body and second extension body are formed by the outer circumferential extension of connecting bottom plate, first connecting hole and second connecting hole are respectively formed in first extension body and second extension body, first fastening pin is fixedly arranged in first connecting hole and first limit hole, second fastening pin is fixedly arranged in second connecting hole and second limit hole.The utility model has the advantages of stable structure, flexible rotation reduction ratio adjustment and strong anti-deformation ability.

This utility model relates to the field of connector protection technology, specifically a connector protection tail shell with a double locking structure, including a front shell and a rear shell, the front shell and the rear shell being adapted to each other. The front shell has symmetrical slide bars on its upper and lower sides, and the rear shell has slide rails on its upper and lower sides. The slide bars pass through the slide rails and are damped and slidably connected to them. A groove is provided on one side of the slide rail, and a limiting device for limiting the slide rail and slide bars is provided in the groove. A locking device for locking the limiting device is provided on the upper side wall of the rear shell. The limiting device includes a spring, a sliding block and a limiting plate. The locking device includes a fixed box, a threaded rod, a lifting block and a locking rod. A damping turntable is provided at the upper end of the fixed box. This double locking mode retains the quick assembly characteristics of elastic locking and enhances the impact resistance under extreme working conditions through threaded force locking.

The application relates to a preparation process of a copper wire and belongs to the technical field of wire production, which comprises the following steps: S1, preparing an oxygen-free copper rod by using an up-drawing method; S2, performing surface cleaning on the oxygen-free copper rod; and S3, processing the oxygen-free copper rod after the surface cleaning into a copper flat wire through a continuous extruding machine; wherein the continuous extruding machine comprises a forming cavity and an extruding die which is detachably fixed in the forming cavity, the extruding die is integrally formed with a die mouth structure, the die mouth structure comprises a gradually-changing forming section and an equal-section shaping section, the geometric profile of the gradually-changing forming section is formed by lofting a circular cross section at an inlet end along an axial direction to a target rectangular cross section at an outlet end, the equal-section shaping section is connected with the outlet end of the gradually-changing forming section, and the cross section shape of the equal-section shaping section is consistent with the target rectangular shape. The application can inhibit edge skinning and cracks, avoid sudden change of pressure on the die during extrusion, thereby prolonging the service life of the die, and without deliberately slowing down the production speed to relieve the pressure, the efficient production requirement of the copper wire is ensured.

The utility model provides a computer cooling fan prevents reverse shaft body, including the shaft body, both ends of shaft body are equipped with the anti -reversal subassembly, the shaft sleeve is equipped with on the shaft body, the shaft sleeve both ends are equipped with the bearing seat, the anti -reversal subassembly includes the limit base, ratchet ring and limit upper cover, be equipped with a plurality of ratchet pawl in the limit base, the sealed joint is realized through the sealing washer between the shaft sleeve and bearing seat, and the interference fit is between the bearing seat and anti -reversal subassembly. The utility model has the advantages that: the anti -reversal subassembly is accurate to limit the shaft body reverse, avoids the impact to the transmission component inside the shaft body after the fan causes the reverse to lead to the wearing component, thereby the adverse condition that influences the service life of fan, the synchronous transmission structure of locating pin, locating groove is passed to the shaft body and ratchet ring, avoids the relative sliding, further guarantees the accuracy of fan power transmission, enhances the operation reliability.

This utility model relates to the field of unmanned aerial vehicle (UAV) equipment fixing structure technology, and provides a UAV arm and tail fin mounting structure, including: an arm, a tail fin connecting molded component, and a tail fin; the arm is fixedly connected to the tail fin via the tail fin connecting molded component; two support plate nuts are embedded in the inner wall of the end of the tail fin connecting molded component connected to the arm; arm fixing bolts fix the tail fin connecting molded component to the arm via the support plate nuts; the end of the tail fin connecting molded component connected to the tail fin is provided with several second threaded holes; the end of the tail fin connecting molded component connected to the tail fin adopts an embedded skin extension structure, the trailing edge of the skin extension structure of the tail fin connecting molded component is designed with a progressive contraction angle, and the tail fin is provided with a third threaded hole corresponding to the position of the second threaded hole; the tail fin connecting molded component is fixedly connected to the tail fin via tail fin fixing bolts. This solves the problems of poor compatibility, cumbersome disassembly and assembly, and large aerodynamic losses in traditional tail fin installations, improves assembly efficiency, and reduces induced drag.