109results about How to "Avoid skew" patented technology

Disclosed is a fastening and straightening apparatus for transplanted trees. The apparatus includes an outer hoop, inner hoops and support legs. A plurality of the inner hoops are arranged in the outer hoop. The inner hoops are arc metal plates. A connecting rod is arranged on each inner hoop. The connecting rods are arranged on the outer hoop in a passing manner. Second ear plates are arranged onthe outer wall of the outer hoop. Each support leg is connected to the corresponding second ear plate through a third fixing bolt. The outer hoop consists of two semi-circular annular metal plates. Afirst ear plate is arranged on one end of the each of the two semi-circular annular metal plates. Second fixing bolts pass through the corresponding two ear plates to fix the two semi-circular annular metal plates. The other ends of the two semi-circular annular metal plates are hinged to each other by hinges. The connecting rods are threaded rods. A first fixing bolt is arrange on one section, located on the outer side of the outer hoop, of each connecting rod. Each third fixing bolt is a bolt with a smooth section. Through the adoption of the structure, the stable fastening and straightening work of the transplanted trees is realized, and skewing and collapsing problems of the trees happening in the tree growth process can be effectively avoided.

This disclosure relates to the technical field of strip steel right-angle edge protection processing equipment. One embodiment of this disclosure provides an edge protection processing device for strip steel production, which includes: a frame and a drive motor. The drive motor is disposed at the bottom of the frame, a feeding assembly is disposed on the frame, a directional sleeve is fixed on the surface of the frame, and a conveying and forming assembly is disposed on the frame. The conveying and forming assembly includes a pair of conveying rollers, both of which are rotatably connected to the frame. Each conveying roller has a transmission gear at its upper end, and the transmission gears mesh with each other. One of the conveying rollers is controlled to rotate by a motor. A first hydraulic cylinder and a second hydraulic cylinder are respectively disposed on the frame. Through the above technical solution, the technical problem of the prior art, which usually involves first transporting the strip steel to the bending area, bending it using a specific mold and pressure equipment, and then pushing it backward after forming before cutting, cannot be completed simultaneously.

The application discloses an industrial steel cutter with adjustable cutting depth and an implementation method thereof, and relates to the technical field of industrial cutting tools, aiming to solve the problem that most of the existing industrial steel cutters adopt fixed structures or simple bolt adjustment structures, the cutting depth of the fixed steel cutter cannot be adjusted, and the steel cutter can only adapt to a single machining condition, the bolt adjustment structure only relies on a single bolt locking, and cannot realize micron-level precision fine adjustment, and the technical scheme is as follows: the industrial steel cutter comprises a cutter body shell, a connecting seat with holes, a telescopic blade assembly, a fine adjustment driving assembly and a connecting assembly, a mounting cavity is arranged at the bottom of the cutter body shell, the connecting assembly is slidingly assembled in the mounting cavity, a driving cavity is arranged at the top of the cutter body shell, the telescopic blade assembly and the fine adjustment driving assembly are connected through the connecting assembly, the industrial steel cutter adopts a worm gear and differential variable pitch screw composite transmission structure, the worm gear has a speed reduction transmission effect, and micron-level cutting depth fine adjustment can be realized.

This invention relates to an adsorption tower and a gas nano-purifier. The adsorption tower includes an outer tube and an inner tube coaxially arranged within the outer tube. The outer tube has a first outlet on its wall. The inner tube includes an inlet section, an adsorption section, and a dust removal section connected sequentially from bottom to top. The inlet section has an inlet on its wall. The adsorption section is filled with adsorbent, and a first filter and a second filter are respectively provided at the connection points between the adsorption section and the inlet and dust removal sections. At least a portion of the sidewalls of the dust removal section is configured as a filter layer. Under purification conditions, the high-pressure gas to be treated enters the inner tube through the inlet, passes sequentially upwards through the adsorption and dust removal sections, enters the annular gap between the inner and outer tubes via the filter layer, and is discharged from the first outlet. Through this configuration, using a tube-in-tube structure with the outer and inner tubes coaxially arranged, the integration of the equipment is improved and its volume is reduced, achieving multi-stage purification of gas within a single component, including diffusion, deep adsorption, and precision dust removal.

The utility model provides a kind of construction sand material bulk density detection device, including base, the top of base is provided with weigher, the top of weigher is placed with measuring cylinder, support assembly for keeping the stable work of weigher is arranged between weigher and base, the top of weigher is provided with the connecting assembly for keeping the stable of measuring cylinder;The top of base is provided with the rotation and beating assembly for allowing measuring cylinder to rotate and can be knocked to measuring cylinder to make sand material keep compact, the support assembly includes annular frame fixedly connected to the upper surface of base, the inner wall of annular frame is slidably connected with annularly arranged support block. Through the rotation and beating assembly set, measuring cylinder can be rotated, and the rotating measuring cylinder can be knocked, which can effectively destroy the bridge structure between sand material particles, so that the sand material inside measuring cylinder can reach the compact state, thereby ensuring the accuracy of sand material density value detection.

The application relates to the field of heating pipe processing, and provides a tube needle stamping equipment for a heating pipe, which is applied to the installation of a tube needle and a terminal pin of the heating pipe, the tube needle penetrating through the terminal pin; the stamping equipment comprises a rack, a placing piece, a stamping piece and an abutting piece; the placing piece is installed on the rack, and a placing groove for placing the heating pipe and the needle tube is arranged on the placing piece; the abutting piece is installed on the rack, the tube needle extends to the abutting piece through the placing groove, and the terminal pin is clamped with the abutting piece; the stamping piece is installed on the rack and located above the abutting piece; the stamping piece drives a stamping end to stamp the terminal pin, and the terminal pin is pressed by the stamping end and the abutting piece on the tube needle. The application has the effect of preventing the terminal pin from separating from the tube needle.

This invention discloses a planetary roller screw assembly fixture and method, including a roller axial positioning fixture, a roller circumferential positioning fixture, a lower cage, and an upper cage. During the manufacturing process of the nut and rollers, the correct meshing points are marked. The rollers and nuts are assembled according to the marked positions to determine the circumferential angle of the rollers. The axial position of the rollers is determined by the roller axial positioning fixture, thus roughly determining the spatial position of the rollers. After assembling the first roller, it is rotated to make way for the marked position on the nut, allowing the assembly of the second roller to continue at the marked position until all rollers are assembled. This method solves the problem of random assembly of rollers, improving assembly efficiency and consistency. The roller circumferential positioning fixture, used in conjunction with the lower and upper cages, prevents the rollers from tilting towards the center during rotation and allows for individual position adjustment of one roller.

The utility model relates to a kind of roll core pipe punching equipment, including rack, the top side of the rack is fixedly connected with guard frame, the side of the rack away from guard frame is horizontally fixedly connected with electric cylinder, the piston rod of the electric cylinder is fixedly connected with top block, the top of the rack is horizontally fixedly connected with feeding chute, the side of the feeding chute is provided with bunker, feeding mechanism is arranged between the feeding chute and the discharge end of bunker, the side of the feeding chute away from electric cylinder is provided with mounting bracket, the side of the top of the mounting bracket towards feeding chute is provided with punching mechanism, the side wall bottom of the side of the mounting bracket away from feeding chute is provided with discharging mechanism.The utility model has the beneficial effects that, by being provided with feeding mechanism, feeding chute, electric cylinder and discharging mechanism, the automatic feeding and discharging of tubular product can be realized, the degree of automation of tubular product feeding and discharging is effectively improved, and the processing efficiency is further improved.

The application is suitable for the technical field of image processing, and provides a battery glue line skeleton extraction method based on an improved ZS thinning algorithm, which comprises the following steps: preprocessing a collected battery glue line image to obtain a binary image; performing improved ZS thinning on the binary image, dividing the image into odd and even subdomains for batch processing, and introducing a constraint condition to iteratively delete redundant pixels to obtain a preliminary skeleton; using a T-shaped 4-neighborhood deletion template to remove T-shaped redundant pixels and realize complete single-pixelization; through 8-chain code tracking, identifying and removing burr branches caused by glue overflow and uneven glue coating, while protecting nodes to obtain a final glue line skeleton. The application solves the problems of skeleton redundancy, over-thinning and burr in existing thinning algorithms, realizes high-precision, single-pixel and burr-free glue line skeleton extraction, and can meet the online detection requirements of battery assembly lines, and has good industrial applicability.

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.

This utility model discloses a cable splicing device, including a base plate, a clamping and guiding mechanism, a tension adjusting mechanism, and a tension fixing mechanism. The clamping and guiding mechanism includes a longitudinal plate, a main wheel, a driven wheel, a guide belt, a hydraulic cylinder, and a pressure plate. The tension adjusting mechanism includes adjusting holes, a tension shaft, a longitudinal block, an adjusting plate, a clamping tube, and a clamping rod. The pressure plate is driven by the hydraulic cylinder to clamp the guide belt, effectively fixing and guiding the cable. With the symmetrical upper and lower guide belt structure, the cable is stably clamped during transportation and splicing, avoiding cable slippage and deflection, and improving splicing accuracy. The structure of multiple sets of adjusting holes combined with the clamping rod and clamping tube allows for adjustable positioning of the tension shaft on the longitudinal sliding block, thereby precisely controlling the clamping tension of the guide belt on the cable, adapting to different types of cables, and improving adaptability and transportation stability.

The utility model belongs to reagent filling automation equipment technical field discloses a kind of automatic canning machine for reagent filling, including base frame, index transmission system, filling unit, capping unit and gas-electricity integrated system, base frame is by bottom support cabinet and frame skeleton welding structure, and frame skeleton is layered truss structure;Index transmission system is integrated in base frame, and index transmission system includes feed conveyor belt and coaxial link's circular turntable, the edge of the circular turntable is provided with equal-angle arc limiting slot;The filling unit is fixed on the frame skeleton, and the filling unit includes storage hopper and the multiple-channel filling head connected, the end of the multiple-channel filling head is embedded with pneumatic ration valve, and the valve body of the pneumatic ration valve extends liquid injection pipe below.The utility model structure is strong in rigidity, and anti-vibration stable, and index transmission positioning is accurate, and multiple-channel pneumatic ration filling precision is high and anticorrosion, and vacuum chuck capping is reliable against falling off.

This utility model discloses a rotor device tooling for power generation, including a base plate, a push cylinder, a movable seat, a placement seat, and a fixed seat. The push cylinder is connected to the base plate, the movable seat is movably connected to the base plate, the piston rod of the push cylinder is connected to the movable seat, the fixed seat is fixedly connected to the base plate, and the placement seat is disposed between the movable seat and the fixed seat. An mounting head is provided on the movable seat, and a fixing head is provided on the fixed seat. The mounting head is fixedly connected to the movable seat, and the top of the fixed head has a placement groove on one side near the fixed seat and a movable groove on the other side. A positioning groove is provided on the top of the fixed head, and a positioning component is also connected to the top of the fixed head. The positioning component is detachably and fixedly connected to the fixed head, and a clamping screw is threaded onto the positioning component, with the bottom of the clamping screw extending into the positioning groove. Through the cooperation of the positioning groove, the clamping screw, and the placement seat, the rotor shaft remains stable during bearing press-fitting, avoiding displacement or skew and ensuring assembly accuracy.

The utility model provides a kind of cannon head dismounting tool for blast furnace mud gun, including tight plate, it is blocking main body, for sticking cannon head end part to cannon head to exert resistance force, clamping plate is set to one side of tight plate, clamping plate is set to frame type structure, the inside wall of clamping plate is adapted to the connecting place of mud gun barrel and cannon head, for clamping positioning at the connecting place of mud gun barrel and cannon head, two connecting plates are respectively set to the two sides of tight plate and clamping plate, for connecting tight plate and clamping plate, to form the dismounting force structure to cannon head, the utility model is dismounted cannon head by mud pressure generated axial thrust steadily by tight plate and clamping plate cooperation, replace traditional hammering, avoid metal debris splashing, cannon head falling off and impact force cause equipment connecting place deformation, sealing element failure, improve dismounting safety and equipment reliability.

The application discloses a stamping die capable of preventing material from being clamped, which comprises an upper die, a lower die and a material clamping prevention assembly, the upper die comprises an upper die seat, an upper die fixing plate and a concave die arranged from top to bottom, a plurality of first mounting holes are formed in the bottom of the upper die fixing plate, a first spring is arranged in the first mounting hole, a second mounting hole is formed in the concave die, the first spring is arranged in the second mounting hole, the lower die comprises a lower die seat and a convex die, the material clamping prevention assembly comprises a mounting plate, an ejection plate and a second spring, the mounting plate is arranged on the lower die seat, a first mounting groove is formed in the mounting plate, the ejection plate is arranged in the first mounting groove, a plurality of third mounting holes are formed in the ejection plate, a second spring is arranged in the third mounting hole, a second mounting groove is formed in the ejection plate, the convex die is arranged in the second mounting groove, and the ejection plate is used for cooperating with the second spring to lift the product on the convex die. The stamping die is cooperated with the ejection plate and the second spring through the first spring and the concave die, so that the product is prevented from being clamped due to being too tightly attached.

This invention relates to the field of automotive air conditioning manufacturing technology, and discloses an automotive air conditioning pipe crimping equipment, comprising a feeding device, a processing device, and a unloading device. The processing device includes end leveling, upsetting, radial extrusion, and deburring units, as well as a three-axis transfer claw. The unloading device integrates unloading and visual inspection units. The equipment achieves multi-process automatic flow of pipe fittings through the three-axis transfer claw, sequentially completing pipe end leveling, upsetting, radial extrusion forming, and deburring, ensuring processing coaxiality, avoiding pipe eccentricity and cracking, and improving pipe end forming accuracy and sealing performance. Simultaneously, online quality inspection through visual inspection during the unloading stage automatically identifies defective products. The entire machine integrates feeding, multi-process forming and finishing, online inspection, and automatic unloading, achieving a high degree of automation, reducing labor intensity, and improving production efficiency and product yield.

The utility model provides a kind of explosion-proof and leakage-proof shell structure of solid capacitor, including shell, shell includes lower shell and upper shell, the bottom of lower shell is provided with the base that is outwardly convex, for stabilizing shell, the outer side of lower shell is fixedly connected with protective strip, lower shell bottom upper end surface is provided with pin protection sleeve, the top inner wall of lower shell is fixedly connected with inboard edge strip, the upper end surface of inboard edge strip is provided with guide hole, the lower end surface of upper shell is fixedly connected with guide column;Lower shell is provided with mounting assembly inside, for installing solid capacitor.The utility model sets up heat dissipation hole on upper shell, cooperate lower shell heat dissipation cavity, heat is dissipated immediately, prevent the risk of bulging and explosion caused by internal pressure sudden rise;Lower shell bottom is provided with pin protection sleeve, positive and negative pole pin is inserted into protection sleeve, avoid pin skew, misplacement, while pin protection sleeve provides external support for pin, prevent pin from shaking after welding.

The utility model belongs to heat exchanger shell technical field, concretely relates to a heat exchanger shell sealing element, including heat exchanger shell, heat exchanger shell one side is provided with the tube sheet, the tube sheet is connected with the flange disc through the connecting assembly, the flange disc one side is provided with the pipe box, and is provided with the first installation slot on the flange disc, the first sealing gasket is set up in the first installation slot, the second installation slot is set up on the tube sheet, the second sealing gasket is set up in the second installation slot, the second sealing gasket is integrally formed with the first sealing gasket, a plurality of through -holes that communicate with the first installation slot are arrayed and are set up on the flange disc, and the flange disc one side array is provided with a plurality of first magnetic blocks, and every first magnetic block position corresponds with every through -hole position. The device makes sealing gasket firmly fixed after installation, prevents the displacement of sealing gasket due to factors such as vibration, pressure fluctuation during the operation of heat exchanger, and greatly enhances the reliability of sealing.

This invention discloses a construction device for cast-in-place piles in highway construction, belonging to the field of cast-in-place pile construction technology. It includes a main body mechanism for placing a reinforcing cage, with an insertion mechanism for inserting the cage into the ground and an adjustment mechanism for adjusting the construction height and angle. By incorporating an inner rotating frame, friction wheels, and clamping roller assembly within the main body mechanism, combined with the preload of the clamping springs, the invention can stably clamp the reinforcing cage onto the friction wheels. Driven by a rotating motor, it achieves a precise 90° rotation of the reinforcing cage from a horizontal to a vertical position. This process avoids the collision with the hole wall or skewing problems that may occur during manual hoisting and alignment, ensuring the accuracy of the vertical insertion of the reinforcing cage into the pile hole, thereby improving the quality of the pile.

The utility model relates to a full -automatic double -position carrier buffer equipment, including frame, the inside horizontal of frame is provided with first conveyer belt, the side of first conveyer belt far away from the inside of frame is provided with second conveyer belt horizontally, the both sides of second conveyer belt are provided with several jacking mechanisms, the other side middle part of first conveyer belt is provided with buffer bin, the both sides of the top of buffer bin are provided with a pair of first handling mechanism, the both sides of the bottom of buffer bin are provided with a pair of second handling mechanism. The utility model has the advantages of being provided with a pair of first handling mechanism and a pair of second handling mechanism, can realize the full -automatic buffer and putting of multi -position carrier, effectively improves the buffer and putting efficiency of carrier, is provided with the limiting baffle and jacking mechanism, can make the carrier keep normal station in the process of handling and putting of carrier, avoids the deflection of carrier, prevents its falling in the process of conveying.

The utility model relates to a blowout preventer for well mouth belongs to petroleum exploitation equipment technical field, including casing, piston, conical rubber core, upper pressure seal oil cavity, lower pressure loose oil cavity, upper pressure oil plug and lower pressure oil plug, the casing top is equipped with the cover plate of compacting conical rubber core, the piston inner hole is equipped with the support cylinder, the lower part inner hole of support cylinder is equipped with the embedded recess, the embedded recess is equipped with the centralizing copper bush, the lower part inner hole outside of casing is equipped with the support recess of locating support cylinder and centralizing copper bush bottom, the inner wall of support cylinder is equipped with cooling liquid cavity, the lower part outside wall of casing is equipped with cooling liquid inlet plug and cooling liquid outlet plug, and the inner end of cooling liquid inlet plug and cooling liquid outlet plug all are screwed in the mounting hole of support cylinder and communicate cooling liquid cavity. The utility model discloses centralizing copper bush can support and right the oil rod in the lower part, prevent deflection, can take away the heat generated when blowout preventer works in time, guarantees equipment to work under the suitable temperature, improves the performance stability.

The utility model discloses a kind of quantitative feeders, including material barrel, the top of material barrel is provided with top cover, installation port is provided on the top cover;Blanking funnel, the blanking funnel is provided with blanking port, the blanking funnel is set in the bottom of the material barrel;Tray, the tray is set in the bottom of the material barrel, the tray is below the blanking funnel;Blanking pipe, the blanking pipe is telescopic sleeve, the upper end of blanking pipe is set in the installation port;Metering disc, the edge of metering disc is provided with multiple guide ribs, the guide rib is vertically arranged, through hole is provided on the metering disc, the through hole is connected blanking pipe;Sealing ball, the sealing ball is set in the material barrel and is configured to switch blanking port of blanking funnel. Realize the measurement accuracy of quantitative feeder is improved.

This utility model discloses a dustproof, enclosed multi-point unloading and conveying device for powder materials, including a base plate with a multi-point conveying structure installed on the upper part of the base plate. The multi-point conveying structure includes: a frame, a storage box, five conveying pipes, five vibrating blocks, an operating panel, a vibrating motor, and five adjustable conveying components. This utility model relates to the field of powder material conveying technology. The storage box, conveying pipes, and conveying box used in this invention are fully sealed to prevent dust leakage and avoid material waste. Furthermore, the five vibrating blocks are linked by the operating panel to a single vibrating motor, which simultaneously strikes each conveying pipe to efficiently break up powder blockages. The adjustable conveying components allow each branch to achieve horizontal rotation of the conveying box through bearing seats and mounting rods, adapting to different unloading positions. The rollers are in close contact with the base plate to ensure stable load-bearing of the conveying box during adjustment and to prevent the overall tilting of the conveying box.

The utility model discloses a tray die carrier conveying device, including the frame, the bottom fixed support leg of frame has the adjusting foot, the both sides of the top of frame each fixed with a chain conveyor belt, and the power input between two chain conveyor belts is connected through the transmission shaft, one end of transmission shaft is fixed with the driven gear, and one end side surface fixed mounting of frame has the motor and the speed reducer, the utility model discloses the conveying of tray is carried out by two chain conveyor belts of motor as power, to avoid the angle of tray to appear deflection when conveying, and each fixed first adjusting mechanism mounting frame on the side surface of two chain conveyor belts that keep away each other, and each installation two first adjusting mechanisms on every first adjusting mechanism mounting frame, and four first adjusting mechanisms can enclose the square structure, and four first adjusting mechanisms can carry out angle adjustment to the tray of conveying, thereby avoiding tray angle deflection.

The utility model provides a remote-controlled building fire monitor, which relates to the technical field of fire-fighting facilities. The utility model includes an inlet pipe, the top end of the inlet pipe is connected with a monitor body through a flange, the outer surface of the monitor body is rotatably connected with a barrel, one side of the bottom end of the barrel is provided with a collection device by means of a convenient device, the collection device includes a collection box, a groove is formed inside the collection box, a water drainage hole is formed at the bottom end of the inner wall of the groove, and the bottom end of the collection box is fixedly connected with a telescopic pipe. By setting the collection device, when installing the fire monitor, the collection box can be installed on one side of the bottom end of the barrel by means of the convenient device, the bottom end of the telescopic pipe is connected with the water recovery pipeline of the building through a flange, and the water dripping when the water flows out through the barrel will enter the groove and be sent to the water recovery pipeline through the telescopic pipe, so as to recover the water dripping at the barrel, reduce the waste of water resources, and improve the environmental protection performance when the fire monitor is used.

The application relates to the technical field of medical products, and discloses a bone nail fixing device. The bone nail fixing device is used for fixing a bone nail, and the bone nail fixing device comprises a nail fixing main body and a supporting shell. The nail fixing main body is sequentially provided with a guide channel and a nail clamping section. The guide channel is used for allowing a tool to pass through, and the nail clamping section is used for clamping the bone nail. The bone nail can be separated from the nail clamping section under the action of the tool. One end of the supporting shell is connected to the nail fixing main body, and the other end of the supporting shell extends beyond the nail clamping section. The application realizes the fixation of the bone nail before implantation, does not need manual holding, reduces the operation difficulty, and improves the operation success rate. Furthermore, the supporting shell is arranged, on one hand, the bone nail is convenient to adjust, so as to be aligned with a to-be-installed position; and on the other hand, the problem that the fixing precision of the bone nail fixing device is poor when the bone nail fixing device is used for installing the bone nail in a suspended state is solved, the skew phenomenon of the bone nail is prevented, and the installation precision of the bone nail is improved.

The utility model relates to pipeline tensile test method technical field, and disclose a kind of round pipe tensile fixture, including fixed support rod, the outside rotation of fixed support rod is connected with rotary handle, the outside sliding connection of fixed support rod has fixed support rod, the top fixed connection of fixed support rod has loading mechanism fixed slot, the top sliding connection of fixed support rod has big wedge and small wedge, the inside sliding connection of fixed support rod top has big wedge, the utility model has remarkable advantage, one is simulation real force precision test, through big, small wedge cooperation, can accurately reflect the stress strain in round pipe actual engineering, obtain accurate mechanical property data, two are simple and easy to operate efficient, utilize rotary handle and side handle, adjust fixed support rod position to easily realize round pipe clamping loosening, save test time, three are clamped stable and reliable, wedge automatic gap filling, prevent round pipe skewing sliding.

The utility model relates to a kind of connecting device for PCB board bent pin needle welding, including connecting portion, with the auxiliary cover plate of pin needle can be disconnectedly connected, multiple front and rear through connecting holes are provided in connecting portion, its bottom surface is equipped with first supporting leg, auxiliary cover plate includes the plate body of cover being located on connecting portion and bottom surface and the abutting connection of connecting portion top surface, at least one second supporting leg being arranged in the bottom surface of plate body and being away from the side of connecting portion, at least one clamping portion being arranged in the bottom surface of plate body, the sum of the height of first supporting leg and connecting portion is identical with the height of second supporting leg, and second supporting leg is parallel with the second pin of bent pin needle, each clamping portion has at least a pair of fixed column extending downward from the bottom surface of plate body, the interval of each pair of fixed column is less than or equal to the width of the pin of bent pin needle.The utility model is simple in structure, convenient to operate, not only guarantee the welding quality of PCB board, but also facilitate adaptation to automatic production equipment, without manual assistance or intervention, improve production efficiency.

The utility model provides a kind of double motor sewing machine, including shell, lower motor is installed in the lower end inside shell back, the motor shaft front end of lower motor is connected with pinion, motor shaft sleeve is set on motor shaft, pinion and the large gear on the cloth feeding main shaft are mutually engaged, the drive gear is connected in the front end of cloth feeding main shaft, and the upper cloth feeding wheel is installed in drive gear by universal shaft connection;The drive gear on the cloth feeding main shaft and lower gear are mutually engaged, and lower gear is fixedly connected in the rear end of lower cloth feeding shaft, and lower cloth feeding gear is installed in the front end of lower cloth feeding shaft connection.The utility model, by setting the transmission structure that lower motor drives pinion and the large gear of cloth feeding main shaft engages, cooperate drive gear and universal shaft connection upper cloth feeding wheel, lower gear linkage lower cloth feeding shaft and lower cloth feeding gear, make upper and lower cloth feeding wheel rotate at the same speed, form the synchronous driving force of clamping cloth, realize parallel synchronous feeding, avoid cloth skew or wrinkle, improve sewing precision.

The application provides a movable base and a refrigerator, the base comprising a base body, a roller mounting seat, a roller and a driving device. The roller mounting seat is pivotally mounted to the base body. The roller is rotatably mounted to the roller mounting seat. The driving device is used to drive the roller mounting seat to swing relative to the base body, so as to move the roller towards the direction of being close to or far away from the base body, thereby adjusting the distance between the base body and the bearing surface. The base of the application not only can support the movement of the electrical equipment through the roller, but also can adjust the distance between the base body and the bearing surface (ground) through the driving device, thereby preventing the electrical equipment from being skewed.