30results about How to "Orientation is accurate" patented technology

The utility model discloses a calcaneus locking plate and a calcaneus fixing device, and belongs to the technical field of medical instruments.The calcaneus locking plate comprises a plurality of locking parts, the multiple locking parts are arranged at intervals, and the locking parts are provided with locking holes; each connecting part is arranged between the at least two locking parts and is respectively connected with the at least two locking parts; wherein the locking hole of at least one locking part is a first locking hole, the first locking hole is used for connecting the locking part with the sustentaculum tali, and the first locking hole is provided with a first central axis AA '; the locking part has a connecting state of being connected to the sustentaculum tali, in the connecting state, a first included angle alpha is formed between the first central axis AA'and the coronal plane YY ', a second included angle beta is formed between the first central axis AA' and the cross section XX ', alpha is larger than or equal to 14 degrees and smaller than or equal to 18 degrees, and beta is larger than or equal to 3 degrees and smaller than or equal to 6 degrees. According to the calcaneus locking plate, the sustentaculum tali can be accurately positioned through the first locking holes in clinic, the locking screws are accurately guided, the accuracy of connecting the sustentaculum tali is improved, and the operation efficiency is improved.

The utility model discloses a winding yarn guide convenient to adjust in the technical field of spinning. The winding yarn guide comprises a guide column, an adjusting wheel, a yarn guide rod and a positioning plate. The guide post is of a cylindrical structure, the positioning plate is locked on the positioning screw rod through a nut, the positioning hole can be sleeved and locked on the positioning screw rod in an up-down adjustable manner, the guide wire rod is a round rod, the adjusting wheel can be locked on the positioning rod in a horizontal transverse adjustable manner, the positioning rod is horizontally and fixedly erected on the positioning plate, and the adjusting wheel is fixed on the positioning plate. By means of the device, the guide direction of a silk thread can be conveniently adjusted, the up-down guide direction of the silk thread can be conveniently adjusted through the positioning plate, the left-right position of the adjusting wheel can also be conveniently adjusted, and therefore the left-right advancing direction of the silk thread can be conveniently adjusted, adjustment is convenient, a silk guide wheel does not need to be detached, and operation is convenient. The yarn guide device is convenient and fast to use, flexible to adjust and more convenient to guide and control the yarn.

The utility model relates to the technical field of cold roll forming equipment, and discloses cold roll forming equipment for strip steel processing, which comprises a table body, a motor protection shell is fixedly mounted at the bottom of the table body, a guide mechanism is arranged at the top of the table body, and the guide mechanism comprises a first motor fixedly mounted on the inner wall of the bottom of the motor protection shell, and a second motor fixedly mounted on the inner wall of the bottom of the motor protection shell. A first gear is fixedly arranged on an output shaft of the first motor in a sleeving mode, a first rotating rod is rotationally installed in the motor protection shell, and the first rotating rod penetrates through the table body and is rotationally connected with the table body. By arranging the guiding mechanism, it can be ensured that strip steel is accurately guided to the designated position in the feeding process, which is crucial to the machining process needing high-precision positioning, accurate positioning can reduce errors and improve the product quality, accurate guiding can ensure that the strip steel cannot be mistakenly placed or damaged when entering a machining area, and the machining efficiency is improved. Therefore, material waste and cost loss are reduced.

This utility model discloses a backrest lock, including a base plate. A locking hook and a locking plate are movably disposed on the base plate. The end of the locking plate has a pull head for connecting and cooperating with an external car pull rod, so that when the pull rod is pulled, the locking plate swings to release the restriction on the swing of the locking hook. The inner wall of the locking hook has a positioning strip for synchronously moving along the swing trajectory of the locking hook when it swings. The inner wall of the base plate has a positioning structure that works in conjunction with the positioning strip to guide the swing trajectory of the locking hook and limit the direction of the hook's swing, and an auxiliary structure that works in conjunction with the positioning structure to limit the wobbling or loosening of the locking hook when it is subjected to vibration and to improve the smoothness of the hook's swing. This utility model solves the problems of unstable hook swing trajectory and insufficient positioning accuracy in traditional backrest locks, easy loosening or wobbling of the locking hook under vibration, and insufficient smoothness of the hook's swing leading to operational jamming.

This invention discloses a torque balancing device and an oil supply and return system, belonging to the technical field of submersion motion test equipment. The torque balancing device is installed on a submersion motion test bench, which includes a column, a platform located inside the column, a crossbeam fixed to the top of the column, and a lifting actuator fixed above the crossbeam. The movable end of the lifting actuator is connected to the platform. The torque balancing device is located between the column and the platform. It is used to counteract the overturning torque caused by the control error of the lifting actuator and the overturning torque caused by a malfunction in the control system of the submersion motion test bench, thus enabling the platform to move vertically along the column. The torque balancing device includes a torque balancing cylinder, a ball joint, and a hydrostatic support plate. The torque balancing cylinder is fixed to the corner beam of the platform, and the hydrostatic support plate is attached to the surface of the column. The piston rod of the torque balancing cylinder is connected to the ball head of the ball joint by screws, and the ball socket of the ball joint is connected to the hydrostatic support plate by screws.

The utility model provides a wound oxygen therapy device, and belongs to the technical field of medical instruments. Comprising an oxygen therapy instrument, the top of the oxygen therapy instrument is fixedly communicated with an air pipe, and the other end of the air pipe is fixedly connected with a pipe head; the clamping assembly is used for fixing the pipe head, and the clamping assembly is connected with the pipe head; and the pre-positioning assembly is used for pre-positioning the air pipe. According to the oxygen therapy device, the clamping assembly, the mounting strip, the oxygen mask and the fixing strip are arranged, so that the clamping assembly can stably fix the tube head, it is ensured that an air tube is not prone to falling off or shifting in the oxygen therapy process, the use safety of the oxygen therapy device is improved, and potential risks caused by misoperation are reduced; the oxygen mask can be tightly attached to the periphery of a wound through the attaching ring, a relatively closed space is formed, oxygen can act on the wound more directly and effectively, the design is beneficial to improving the oxygen therapy effect, and healing of the wound is promoted.

The utility model relates to a paper collecting box for a paper mounting machine. The paper collecting box for the paper mounting machine is simple in structure, convenient to use and practical. The paper collecting box comprises a box body, a movable rod and a supporting plate, it is ensured that paper enters the collecting box smoothly through a baffle, then the paper entering the box body is stacked in order through a stacking block and a guiding head, and the paper storage capacity is further increased in combination with a first spring and a second spring; and the guide head can be adjusted according to the connecting rod and the guide rod so as to adapt to the sizes of different pieces of paper. The paper mounting machine can be widely applied to the technical field of paper mounting machines.

This utility model discloses a foldable and quick-installation electric towel rack, relating to the technical field of kitchen and bathroom appliances. It includes two vertical bars on both sides, several horizontal heating bars, an installation assembly, and an electric heating controller. The two vertical bars each include a movable main body assembly and a fixed main body assembly. A foldable structure is provided between the movable and fixed main body assemblies. The foldable structure includes a movable fixing head, a folding limiting body, and a 180-degree positioning pin. The movable fixing head is fitted onto the folding limiting body. The folding limiting body has a wire groove, a folding track guide groove, and a positioning groove that matches and positions the 180-degree positioning pin. A rotating guide pin is provided in the folding track guide groove. A 90-degree stop groove is provided on the inner side of the folding limiting body at the folding position of the two vertical bars. This utility model features high space utilization, diverse application scenarios, simple and quick installation, a weld-free main body connection, zoned temperature control, a simple overall structure, and convenient transportation.

The application discloses a fabric wrinkle-removing and shaping processing equipment and belongs to the technical field of fabric processing, and aims to solve the problems of unstable guiding, inconvenient pressure adjusting, uneven ironing, untimely drying and inaccurate winding control of the existing fabric wrinkle-removing and shaping equipment, which leads to poor processing efficiency and quality. Technical scheme points are as follows: the equipment comprises a rack, a fixed plate, a bearing seat II, a driving shaft and a winding roller arranged in the rack, a guiding assembly arranged in the rack, a control cabinet and a servo motor arranged on one side of the rack, a connecting plate, a U-shaped frame and a pressing assembly arranged at one end of the rack, a side plate and two groups of ironing assemblies arranged on one side of the connecting plate, and a hot air blower arranged in the rack. The guiding assembly realizes stable fabric conveying, the pressing assembly can flexibly adjust the pressing strength, the ironing assemblies realize synchronous and uniform ironing, the hot air blower dries the ironed fabric, and the servo motor accurately controls the winding speed. The equipment realizes integrated fabric processing, is suitable for various fabrics, and improves the processing efficiency and wrinkle-removing and shaping quality.

An upper wire guide mechanism of an automatic wire threading electric spark wire cutting machine includes a slender wire guide tube, characterized in that the upper part of the wire guide tube is in an upper positioning and mounting chuck, realizing the positioning, clamping, air guiding and wire pre-guiding functions of the upper part of the wire guide tube. An air guiding wire guiding channel is provided on the upper part of the wire guide tube, which assists the feeding of the electrode wire so that the electrode wire can be fed smoothly and reliably. A precise wire guide nozzle is provided on the lower part of the wire guide tube, and a bypass air guide channel is provided on the periphery of the precise wire guide hole. In addition, the present scheme designs a precise positioning clamping mechanism, in which the precise positioning hole cooperates with the outer cylindrical surface of the lower part of the wire guide tube, and can precisely position, automatically clamp and release the lower part of the wire guide tube. The wire guide tube can move axially in the precise positioning hole. The present scheme solves the feasibility and reliability of automatic wire threading of the upper wire guide mechanism under various workpiece threading conditions and the problem of precise guiding of the electrode wire.

The invention relates to a component mounting assembly in a power transformation cabinet and the power transformation cabinet, the mounting assembly comprises a sliding frame, an insertion frame, a rotating plate, a mounting frame, a sliding block and a connecting rod, the sliding frame is fixed in the power transformation cabinet, the insertion frame is slidably mounted on the sliding frame, the rotating plate is rotatably mounted on the insertion frame, the mounting frame is fixed on the rotating plate, and the sliding block is slidably mounted on the insertion frame. And the other end of the connecting rod is fixedly connected with the rotating plate. Compared with the prior art, the power transformation cabinet has a sliding and rotating multi-stage movement structure, the mounting positions of components in the power transformation cabinet can be flexibly adjusted, the overall position can be adjusted through sliding along the sliding frame, the components can be overturned through the rotating plate, the adjusting flexibility is high, and the practicability is high. The problem that the maintenance and wiring operation space of a traditional fixed installation mode is limited is solved, installation of large components can be met, and meanwhile the stability of rotation adjustment is guaranteed through a connecting rod linkage structure.

The application relates to a small mine electromagnet which comprises a shell, one or more electromagnet devices are mounted on the shell, the electromagnet device comprises a shell body, the shell body is fixedly connected with the shell, an armature assembly is arranged in the shell body, a yoke is arranged at the lower end of the armature assembly, a coil assembly is arranged outside the armature assembly and the yoke, the coil assembly is electrified to drive the armature assembly to move to the side close to the yoke, a reset piece for driving the armature assembly to reset is further arranged on the yoke, a PCBA plate for controlling the on-off of the coil assembly is arranged in the shell, a socket assembly for electrifying the PCBA plate is further arranged on the shell, an end cover assembly is fixedly arranged at the upper end of the shell body, a button mechanism for pushing the armature assembly to move is arranged in the end cover assembly, the button mechanism comprises a stainless steel button and a waterproof cap which are integrally formed by injection molding, and the waterproof cap corresponds to the armature assembly. The application provides a small electromagnet which is excellent in protection performance, convenient to assemble and suitable for mines.

This application discloses a retractable drawer divider assembly, belonging to the field of household goods technology. It includes a first divider and a second divider, both L-shaped. The first divider has a groove along its length at its upper part. The top of the second divider inserts into the groove, forming an inverted T-shaped divider. When either the first or second divider is subjected to force, the second divider moves along the groove, changing the length of the divider. A row of toothed grooves is provided on the second divider near the groove. A snap-fit ​​element with locking teeth is flip-up on the first divider. Pressing down on the snap-fit ​​element causes the locking teeth to engage in the toothed grooves, fixing the first and second dividers along their length. Flipping the snap-fit ​​element upwards causes the locking teeth to disengage from the toothed grooves, allowing the first and second dividers to extend and retract. This application features a simple structure, low cost, strong applicability, and convenient operation.

This utility model relates to the field of limiting and guiding technology, and discloses a limiting and guiding device for hoisting bridge components. It includes a fixed plate, a guide block installed at the center of the front end of the fixed plate, square grooves on the upper left and right sides of the guide block, a base installed at the bottom of the fixed plate, and elongated holes at the front and rear ends of both sides of the guide block. Limiting mechanisms are installed on the upper left and right sides of the front end of the fixed plate, which are used to restrict the guide block. The front end of the fixed plate is threadedly connected to the guiding mechanism. In this utility model, when the guide block moves upward, it presses against the fixed block and the limiting plate, causing them to embed into the square grooves. Simultaneously, a compressed spring stores elastic potential energy. After reaching the desired position, the fixed block rotates outward about the rotating column as an axis, and the spring releases energy to eject the limiting plate. At this point, the guide block's downward movement is blocked by the fixed block, completing the installation. The slider and the groove cooperate to provide precise guidance for the movement of the limiting plate.

The utility model discloses a linear type servo electric cylinder which comprises a motor, a reduction gearbox, a lead screw, a guide rod and a lead screw nut, the motor is connected with an input shaft of the reduction gearbox, an output shaft of the reduction gearbox is connected with the lead screw, the guide rod and the lead screw are arranged on the same side of the reduction gearbox in parallel, and the lead screw nut is connected with the guide rod. Wherein the motor, the reduction gearbox and the guide rod are integrally formed; the lead screw nut is in threaded connection with the lead screw, a guide groove extending in the axial direction of the guide rod is formed in the lead screw nut, and the guide rod is slidably connected with the guide groove in a matched mode. According to the linear servo electric cylinder, the overall dimension of the whole electric cylinder is effectively reduced, the number of parts is reduced due to the integral forming design, the cost of raw materials is reduced, the production and manufacturing process is simplified, and the assembling procedure and the labor cost are reduced. And meanwhile, fewer parts mean fewer fault points, so that the later maintenance cost is reduced.

This utility model discloses a high-efficiency drying device for pharmaceuticals, relating to the field of pharmaceutical technology. Its key technical features include: a drying chamber with a hinged door on one side; multiple exhaust holes on the top side wall of the drying chamber; a gas supply assembly connected to the bottom of the drying chamber; a heating chamber located at the bottom of the drying chamber, connected to the gas supply assembly at its bottom; multiple layers of electric heating mesh horizontally arranged inside the heating chamber; an air outlet on the top of the heating chamber; and an upward-blowing fan inside the air outlet. A placement frame is installed inside the drying chamber, its top connected to the top of the drying chamber via a lifting assembly. The placement frame includes multiple vertically distributed limiting rings supporting a placement bucket. A supporting ring adapted to the limiting rings is fixedly installed on the top of the placement bucket. Multiple airflow holes are evenly distributed on the side wall of the placement bucket, which is used to hold medicinal materials. This utility model balances efficiency and compactness in drying.

The present invention discloses a needle insertion guide device, wherein a cloth needle base plate is arranged above the base plate of the needle threading device, a U-shaped cloth needle slot block is arranged above the cloth needle base plate, a U-shaped cloth needle slot is arranged in the U-shaped cloth needle slot block, a gap is arranged between the cloth needle base plate and the U-shaped cloth needle slot block for the movement of a push plate, one side of the push plate is connected to a driving device, a guide block capable of moving up and down is arranged below the U-shaped cloth needle slot block, a guide groove is arranged on the guide block, the axial direction of the guide groove is parallel to the movement direction of the push plate, a limited block is arranged on the base plate of the needle threading device, a gap is provided between the U-shaped cloth needle slot block and the U-shaped cloth needle slot block for the movement of a cigarette clamp, and the push plate, the guide block and the limited block are arranged in sequence along the travel direction of the U-shaped needle in the horizontal direction. Needle threading is achieved by stacking multiple layers of U-shaped needles in the U-shaped cloth needle slot, and the U-shaped needles at the bottom layer are pushed toward the cigarette clamp by the push plate. The U-shaped needles use the guide groove to fix the direction, so that rapid, accurate and continuous needle threading is achieved, manpower is reduced, labor intensity is reduced, and production efficiency is greatly improved.

The utility model discloses a full -automatic hydraulic pressure step -feed equipment, including drive mechanism, including a plurality of rotating electrical machines, rotating electrical machine drive screw rod autorotation, guide mechanism, including a plurality of mutually parallel arrangement's screw rod, and screw rod at least has two moving plate, chuck, each moving plate all are fixed with mutually coaxial arrangement's chuck, and the chuck has the passage hole that can hold or release to axle rod spare, wherein, moving plate and screw rod all are movable assembly, and the outer wall of screw rod includes outer thread section and light axle section, and adjacent two moving plates are movable assembly with same screw rod through a screw nut and a linear bearing respectively, and different chuck alternately holds and releases to axle rod spare and alternately axial motion, and the feed inlet of the chuck in upstream has a plurality of round table cavities, and the feed inlet of the chuck in downstream has a round table cavity. Adopt the utility model guide accurate, prevent skew, adapt to the characteristic of long axle rod spare.

This utility model discloses an antenna radome flipping assembly device, including a frame, a flipping bearing component, a flipping plate component, and an anti-rotation mechanism. The flipping bearing component consists of two sets, each including: a bearing fixedly installed on the top of the frame; and a stainless steel rotating shaft fixedly fitted inside the inner ring of the corresponding bearing. This utility model, through a series of structures, can prevent mistakenly positioning the antenna array, ensuring that employees cannot place the antenna array in the wrong direction or repeatedly adjust its position, thus eliminating assembly errors and improving efficiency and accuracy. It can press and lock the antenna array after the outer cover is installed, and can rotate and lock the positioned and pressed antenna array and outer cover to prevent rotation, allowing personnel to tighten screws from below. Furthermore, it can precisely guide the screws during tightening, preventing damage to the antenna array during screw tightening and reducing the risk of damaging parts.

A head end punching balloon comprises an inner balloon made of a non-compliant material, the inner balloon is sleeved with an outer balloon made of a compliant material, the inner balloon is connected with an inner balloon pressure pump through an inner balloon connecting pipe, and the outer balloon is connected with an outer balloon pressure pump through an outer balloon connecting pipe. The in-situ windowing balloon has the following advantages that the balloon body is close to the balloon far end opening, and the in-situ windowing operation requirement can be better met. The invention has the advantages of simple structure and convenient operation, effectively avoids the deviation of the puncture direction caused by the problem of the adjustable bent sheath structure, reduces the risk of inducing massive hemorrhage, improves the operation safety, has wide market prospect, can solve the clinical practical problem, improves the operation effect and safety, has important application value in the field of vascular interventional operation, and has wide application prospect. The device is expected to become an important auxiliary instrument in a vascular interventional operation, provides better diagnosis and treatment service for patients, and can bring good economic benefits for medical institutions and medical instrument enterprises.

This application relates to the field of polymer composite materials technology, specifically to a salt spray resistant and mildew-resistant polyolefin material, its preparation method, and its application. The material mainly consists of a matrix resin, flame-retardant filler, crosslinking agent, silane coupling agent, anti-aging agent, and lubricant. The flame-retardant filler comprises aluminum hydroxide and benzimidazole-magnesium hybrid filler, compounded in a specific ratio. The preparation method includes: pre-activating the hybrid filler and silane coupling agent, then melt-blending and granulating them with other components. The resulting particles are then molded, crosslinked by electron beam irradiation, and annealed to obtain the final product. This invention, through the synergistic effect of its components, enables the material to simultaneously possess excellent salt spray corrosion resistance, mildew resistance, UV aging resistance, and long-term electrical stability, making it particularly suitable for products such as marine photovoltaic cable sheaths that require long-term use in harsh environments.

The utility model discloses a kind of logistics warehousing goods classification storage goods shelves, belong to warehousing equipment technical field, including sliding base, moving mechanism and support mechanism, sliding groove is opened in the sliding base, the moving mechanism is movably matched in sliding groove, it includes moving plate, the bottom surface of moving plate is rotatably connected with the vertical moving wheel rolling in the groove bottom of sliding groove, and the lateral roller abutting to the inner wall of sliding groove, the support mechanism is inserted into the connecting groove of moving plate upper connecting block by its bottom fixed connecting rod, then by fixed bolt locking, it is constituted with stable connection.The utility model by with the vertical moving wheel and lateral roller independent bearing of guiding function respectively by load-bearing function, and make it in sliding groove collaborative work, effectively solved the problem that existing mobile goods shelves is poor in stability when moving under heavy load, easy to sway deflection, reached the beneficial effect that mobile is stable, guiding is accurate and overall structure connection is stable.

The utility model discloses a kind of automatic feeding devices for metal pipe processing, and the roundness correction mechanism includes support seat two, the middle part upper end of support seat two is hollow, and the surface of support seat two and located hollow place outside side is rotationally connected with swivel ring, the front of swivel ring is rotationally connected with several movable frames, each movable frame is equidistantly arranged around swivel ring surface, and the inner wall of each movable frame is also slidably connected with movable rod, one end of movable rod located swivel ring outside side is rotationally connected with support seat two, and the other end inner wall of movable rod is rotationally connected with roundness correction wheel, the outer wall of movable rod is also fixedly installed with motor, the output shaft of motor passes through movable rod and is fixedly connected with roundness correction wheel rotation axis, and the pipeline to be processed can pass through the support seat two in roundness correction mechanism, and the outer wall of pipeline is extruded roundness correction by the roundness correction wheel of support seat two periphery, and then the ovality of metal pipeline is effectively adjusted, in addition, the spacing between roundness correction wheel can be adjusted in size, and then it is suitable for the roundness correction of different diameter metal pipeline.

The utility model discloses a side-hanging and side-replacing battery box of a heavy truck, which belongs to the technical field of battery boxes of heavy trucks and comprises a battery box shell, a battery box base, a plurality of battery box supports and a battery pack. The number of the battery pack is at least one, the battery pack is assembled among the plurality of battery box supports, the battery box shell is assembled on the upper end face of the battery box base, the plurality of battery box supports and the battery pack are sleeved in the battery box shell, and four rotating locking openings are assembled on the lower end face of the battery box base and are distributed in a rectangular shape. The side-hung and side-replaced battery box of the heavy truck has the advantages of being convenient to replace and capable of improving the use efficiency of the truck, the device can be locked on a battery box support of the heavy truck by connecting the four rotating locking openings with a reinforcing framework at the bottom of the truck, installation is convenient and fast, the use efficiency of the truck is improved, meanwhile, detachment is convenient, and the service life of the heavy truck is prolonged. The four rotating lock openings are accurate in guiding, high in bearing capacity and high in reliability.

The utility model relates to the field of fin cooling discloses a fin cooling device for heat exchanger processing, including two rotating holes, two rotating holes all set up in the left side of cooling storehouse, the inner wall of rotating hole rotatablely provided with rotating column, one end of rotating column is fixed with the connecting barrel, the connecting barrel extends to the cooling storehouse, the other end of connecting barrel extends to the outside of cooling storehouse through the connecting pipe, and is connected with the output end of gas conveying equipment, the outer wall of connecting barrel is fixed with a plurality of injection head, injection head is linked with the inside cavity of connecting barrel intercommunication. In the utility model, through the synergetic effect of rotating column, connecting barrel, tooth slot, connecting frame, rack and poking block, the angle of injection head can be adjusted, so that the operator can flexibly adjust according to the different shape, spacing of fin, guarantee that the airflow that injection head sprays can cover the different parts of fin, prevent the phenomenon that fin appears local overheating or cooling deficiency.

This application belongs to the field of machining technology and provides a filling fixture, including a tray, a container, a bracket, and a driving device. The tray has multiple storage slots for filling workpieces, which are arranged side by side on the tray. The container has an inlet for connecting to a discharge device. The bracket is disposed inside the container, and a movable frame is provided on the bracket. The tray is detachably disposed on the movable frame. The driving device is disposed on the container and is connected to the bracket via a transmission mechanism. The driving device drives the transmission mechanism to move the movable frame on the bracket, so that the storage slots on the tray are automatically aligned with the inlet on the container. This application also provides a precision parts processing equipment with the above-mentioned filling fixture. This application aims to solve the technical problems of low efficiency and easy accidents leading to product loss and damage in the filling operation of precision parts in the prior art.

The utility model relates to the technical field of saw blade welding machines, and discloses a saw blade guide mechanism for a saw blade welding machine, which comprises a bottom plate and two guide rollers, two side plates are symmetrically and fixedly arranged on the surface of the bottom plate, the two guide rollers are symmetrically arranged between the two side plates, and the guide plates are arranged on two sides of the top of each guide roller. Sliding rods are fixedly arranged on the sides, deviating from each other, of the guide plates on the two sides, the sliding rods are in sliding connection with the side plates, moving plates are arranged on the two sides of the two side plates, the two moving plates are fixedly connected with one ends of the sliding rods, a two-way screw is rotationally arranged between the two side plates, and the two moving plates are in threaded connection with the two ends of the two-way screw. According to the utility model, the guide plates are arranged above the guide rollers, so that the position of the saw blade which moves towards the side surface in the guide moving process can be limited, the accurate guide effect of the saw blade can be realized, the welding accuracy is improved, the distance between the guide plates on the two sides can be adjusted, and the universality of the welding machine is improved.

The invention provides a femoral extramedullary positioner in unicompartmental knee arthroplasty, which belongs to the technical field of unicompartmental knee arthroplasty, and comprises a positioning frame, a femoral medial condyle buckle, a femoral anterior condyle buckle and a test mold gasket fixing frame, and the positioning frame is provided with a positioning hole; the thighbone medial condyle buckle and the thighbone anterior condyle buckle are installed on the side, facing the knee joint, of the positioning frame, and the thighbone medial condyle buckle is transversely arranged and used for clamping the inner side and the outer side of the thighbone medial The femur precondyle buckle is longitudinally arranged and used for clamping the femur precondyle when the femur is located at the flexion position; the test mold gasket fixing frame is slidably installed at the bottom of the side, away from the knee joint, of the positioning frame and horizontally moves left and right along the positioning frame. The thighbone positioning device is simple in structure and convenient to operate, the thighbone positioning accuracy is improved, and the thighbone prosthesis placement accuracy is improved.