408 results about "Stable fixation" patented technology

The invention relates to the technical field of medical instruments, in particular to an artificial ligament braided fabric. The artificial ligament braided fabric comprises a braided part, the braided part is formed by interweaving warp yarns and weft yarns, a mesh staggered structure is formed, the warp yarns extend in the width direction of the braided part, and the weft yarns extend in the length direction of the braided part. Compared with the prior art, by optimizing the weaving structure and the size design, the complex movement requirements of various joint parts such as the ankle joint and the acromioclavicular joint can be met, the stable fixing effect is provided, and the risks of loosening and shifting of the graft are reduced.

The invention discloses a cable harness detection device for a new energy automobile, and belongs to the technical field of harness detection. The device is composed of a fixing mechanism, a tensioning mechanism, a bending mechanism, a torsion mechanism, a detection module and a control system. Through a pneumatic self-adaptive clamping structure and an elastic tensioning mechanism, stable fixation and constant tensioning of the wire harness are realized; the servo driving push rod and the rotatable mounting plate can simulate bending in multiple directions; the three-jaw chuck type torsion mechanism realizes low-speed and high-torque reciprocating torsion; the detection module integrates electrical performance detection and infrared temperature sensing, and monitors the conduction state, resistance, insulation strength and temperature rise in real time; the control system realizes automatic control of bending, torsion and composite loading based on a PLC, and can be connected with an upper computer or a cloud platform to realize data uploading and life curve analysis. The device can truly simulate the complex working condition of the vehicle, and improves the detection precision and reliability.

The invention discloses a dual-purpose mounting structure of a pole-mounted circuit breaker, relates to the technical field of power equipment, and aims to solve the technical problems that the matching precision of the mounting structure and a circuit breaker body is influenced by temperature fluctuation, and the service life is influenced. Through collaborative design of the two-way shape memory alloy deformation sleeve, the self-adaptive bolt, the spiral section and the waterproof heating structure, efficient dual-purpose adaptation to the cold winter environment and the high-temperature summer environment is achieved, at the high temperature summer, the deformation sleeve is heated to expand to push the positioning ring to be matched with the self-adaptive bolt expansion sleeve to stretch elastically, rigid extrusion of metal parts is avoided, and the service life of the metal parts is prolonged. Meanwhile, the spiral section is driven to secondarily press the rubber layer, the wind resistance and skid resistance are improved, and stable fixation under high-temperature strong wind is guaranteed; in extremely cold winter, the deformation sleeve is subjected to phase change shrinkage to pull the positioning ring, the self-adaptive bolt fills the cold shrinkage gap, the spiral drainage track dredges dew, the metal net is heated to prevent icing, and the pressing force of the spiral joint is matched to avoid the risk of gap expansion and slipping.

The utility model discloses a cannon connector female head structure, which comprises a plug body, a main body and a casing, one end of the main body is connected with the plug body, the other end of the main body is provided with external threads, the inner wall of the casing is provided with internal threads, the main body is connected with the casing through the threads, and the casing is provided with external threads. One end of the main body away from the plug body is provided with a wire fixing device. The linker female head is provided with the fixing device, so that a user can repair the linker female head by himself / herself, and when a lead is broken, the shell of the connector female head is detached to expose an internal wiring area. And then accurately inserting the wire core of the broken wire into a preset wire hole. And then, proper pressure is applied to the wire core through rotation operation by utilizing the configured wire pressing bolt, so that the stable fixation of the wire is realized.

The utility model relates to the technical field of automobile manufacturing, in particular to a device for controlling camber assembly errors of automobile front wheels, which comprises a brake attaching plate (1). One end of the brake attaching plate (1) is connected with a brake (2), and the other end of the brake attaching plate (1) is connected with a rotating arm (3); a shock absorber limiting plate assembly is arranged on the rotating arm (3); a shock absorber (4) is connected in the shock absorber limiting plate assembly; the brake attaching plate can achieve stable fixing of the brake. The shock absorber limiting plate assembly can achieve fixation of the shock absorber. The mounting positions of the rotating arm and the brake attaching plate can be adjusted; according to the device, the assembly position between the shock absorber and the brake can be adjusted and fixed, so that the assembly precision of front wheel camber can be ensured; and meanwhile, the device is simple in structure and use, and the production cost is greatly reduced.

The invention relates to the technical field of gear grinding, and discloses a gear inner ring machining and grinding device which comprises a rotating assembly, a lifting assembly, an inner clamping assembly, a conveying assembly, a guiding assembly, a conductive assembly, an outer clamping assembly, a rotating lead screw, a rotating gear and a grinding assembly. The gear inner ring is accurately positioned through the inner clamping assembly, it is ensured that the gear and the rotating assembly are strictly coaxial, the hole diameter is prevented from being out of tolerance during grinding, the size precision and the surface flatness of the inner ring are ensured, the outer clamping assembly is designed in a self-adaptive clamping mode and can be matched with the gear with the irregular outer surface, and flexible attaching and rigid supporting are combined, so that the machining precision of the gear is improved. Even if not all clamping surfaces are in contact, the axis can be kept stable, and stable fixation can be achieved without complex adjustment. And the inner clamping assembly can return to the telescopic positioning cavity after positioning is completed, interference to grinding operation is avoided, and the grinding effect is further guaranteed in cooperation with precise feeding of the grinding assembly.

The utility model discloses a combined type pet belt buckle convenient to adjust. The combined type pet belt buckle comprises a bandage assembly, an inserting buckle assembly and a rapid tightness adjusting assembly. And the other end of the quick tightness adjusting assembly is connected in series with the middle section of the bandage assembly. The quick tightness adjusting assembly is composed of a fastener body, a pressing plate rotating shaft, a pressing plate operating handle, a bandage pressing block, a bandage pressing strip and a bandage winding beam, and quick adjusting and fixing of the bandage assembly are achieved by turning up and pressing down the pressing plate operating handle. The buckle assembly is used for achieving quick connection of the pet belt buckle. The bandage assembly is composed of a fixed-section bandage, an adjusting-section bandage and a wearing product, and the adjusting-section bandage bypasses a gap between the pressing strip anti-skid teeth and the bandage pressing block and a gap between the bandage pressing strip and the bandage winding beam and then is overlapped, so that length adjustment is achieved. The utility model has the advantages of convenient adjustment, fast connection, stable fixation and the like, is suitable for various pet wearing products, and provides more convenient and reliable pet supply choices for pet owners.

A square hole shaft comprises a large column in the middle and small columns arranged at the two ends of the large column in the length direction, and at least part of the end, close to the small columns, of the large column in the circumferential direction is contracted inwards to form a step structure; the utility model provides a handle lock rotating structure with a bearing and a pull rod and a handle lock. A first shifting piece and a second shifting piece are respectively sleeved at a step structure of a square hole shaft to form stable fixation; the two rotary bearings are arranged on the two small columns respectively in a sleeving mode, in the rotating process of the square hole shaft, the square hole shaft drives the inner rotating part to rotate, the outer fixing parts of the rotary bearings are fixed respectively and rotate, the rotary bearings support the square hole shaft, meanwhile, resistance in the rotating process is reduced, and operation resistance and noise are controlled. The spring provides resilience force for realizing the latch bolt, and the guide column provides sliding guide of the latch bolt and position limitation of the spring.

The invention discloses a power taking and replacing device applied to a robot camera, and relates to the technical field of power transmission, and the power taking and replacing device comprises a protection unit which comprises a protection cylinder, a plurality of groups of open grooves, a plurality of groups of driven parts and a protection cover; the replacing unit comprises a fixed cylinder, a cover cylinder, a movable cylinder and a driving part. The mechanical arm has the beneficial effects that the camera can be quickly mounted on the mechanical arm, stably fixed, effectively protected against impact and conveniently maintained, and the lens can be quickly replaced. And through forward rotation locking of the cover cylinder and fixation of the camera shooting integrated board by the baffle plate, installation rapidness and stability are ensured. And meanwhile, the matching of the convex block and the spring column can quickly respond when being collided, so that the lens is protected and secondary damage is reduced. In addition, the design of the guide column and the spring wedge block allows quick unlocking, and the inspection and maintenance process is simplified.

This utility model relates to the field of target material packaging technology and discloses a special flight case for rotating targets. The case includes a case body, a hinge fixedly connected to the outside of the case body, a cover plate fixedly connected to the outside of the hinge, and the lower surface of the cover plate disposed on the upper surface of the case body. An upper shell is fixedly connected to the inside of the case body. A sliding groove is formed inside the upper shell, and a pressing plate is slidably connected inside the sliding groove. A spring is disposed on the lower surface of a retaining plate, a sponge block is fixedly connected to the outside of the pressing plate, and a rebound assembly is disposed outside the pressing plate. In this utility model, the sliding groove inside the upper shell guides the pressing plate to slide, and the retaining plate and spring limit the target material, thereby achieving stable fixation and safe protection of the target material, meeting the high-precision protection requirements of rotating targets.

The invention relates to a puncture outfit with a positioning function, and relates to the technical field of medical instruments, the puncture outfit comprises a puncture cannula, the upper end of the puncture cannula is detachably provided with a sealing cap through threads, the upper side of the sealing cap is fixedly provided with a first valve membrane, the lower side of the sealing cap is fixedly provided with a second valve membrane, and one side of the sealing cap is fixedly provided with a connecting pipe; an air hole is formed in the middle of the connecting pipe, a tail handle is arranged on the inner wall of the sealing cap, a puncture rod is fixed to the middle of the tail handle, a puncture head is fixed to the other end of the puncture rod, and a plurality of scale grooves are formed in the lower side of the puncture cannula. According to the puncture outfit, rotation operation is conducted by manually rotating the handle, on one hand, the effect of precisely positioning the puncture depth is achieved, the safety of the puncture outfit in the clinical use process is remarkably improved, on the other hand, the stable fixing effect is achieved, the stability of the puncture outfit in the use process is remarkably improved, and on the other hand, the wound sealing effect is achieved; and the use protection performance of the puncture outfit is obviously improved.

The utility model provides a filter bag component convenient to replace, which belongs to the technical field of air purification and comprises a positioning ring, a connecting rope is fixedly mounted on one side of the positioning ring, and one end of the connecting rope is fixedly connected with a connecting pipeline. The positioning mechanism is evenly distributed on the periphery of the top through the four stand columns, the rotating shaft is installed at the top ends of the stand columns, the positioning rod is fixedly connected with the top of the rotating shaft, the soft rubber rope is arranged at one end of the positioning rod, and therefore a stable supporting structure is formed. According to the technical scheme, the front side, the rear side and the right side of the positioning ring are respectively arranged, and an accurate limiting function is provided through fixed connection of the balls and the fastening bolts and sleeving of the threaded ring sleeve, so that stable positioning of the filter bag body is effectively ensured, and the assembly cost is reduced through simplified operation steps and reduced assembly number. The convenience and the efficiency of replacing the filter bag body are obviously improved.

The invention discloses a detection device for a metal corrugated pipe, and relates to the technical field of corrugated pipe detection, the device comprises a base, the left side and the right side of the upper end of the base are respectively and symmetrically fixed with a fixed plate I and a fixed plate II, and the upper ends of the fixed plate I and the fixed plate II are provided with surface detection structures for detecting the outer surface of a pipe fitting. According to the internal supporting structure, through a linkage mechanism of the internal supporting lead screw and the gear, stable fixation of the interior of the pipe fitting and synchronous rotation during detection are achieved; meanwhile, the surface detection structure utilizes a reciprocating screw rod to drive a detection piece to do linear reciprocating motion, and the outer surface of the pipe fitting is comprehensively scanned; therefore, the stability of the pipe fitting in the detection process is ensured, errors caused by shaking or displacement are avoided, and the detection precision is remarkably improved; omnibearing detection capability ensures that tiny defects on the surface of the pipe fitting are accurately found, and detection quality and reliability are further improved.

The utility model provides a battery shell processing fixing tooling, including bottom plate and adjusting plate, the one side of bottom plate top is provided with the adjusting mechanism, and the one side of bottom plate top far away from the adjusting mechanism is provided with the spacing mechanism, the utility model discloses through the use of fixing mechanism, realized battery shell high-efficiency stable fixation, when in use, the fixing mechanism is not influenced by the fixing mechanism. A worker places a battery shell on the surface of an adjusting plate, then electric push rods on the two sides are started, the electric push rods drive fixing plates to move towards the edges of the two sides of the shell, and when the fixing plates make contact with the edges of the shell, a plurality of fixing blocks located on one side of the fixing plates can extrude springs to different degrees according to the shape of the edges of the shell, so that the shell is fixed more firmly; the fixing device is simple and convenient to operate, adapts to battery shells of different shapes and sizes through the elastic effect of the spring, and ensures the stability and reliability in the fixing process.

The utility model relates to an automatic lifting device, and belongs to the technical field of vehicle body operation equipment. Comprising a frame, a steering mechanism, wheels and a brake mechanism, lifting mechanisms are arranged at the bottom of the frame, the lifting mechanisms are located at the two ends of the frame, the steering mechanism is located at the top of the frame, the brake mechanism comprises a hand brake and a foot brake, the foot brake is located on the side, close to the steering mechanism, of the frame, and the hand brake is located on the frame. The utility model provides an automatic lifting and lifting device, which realizes automatic lifting, accurate adjustment and stable fixation of a body in white through the synergistic effect of a lifting mechanism, a steering mechanism, wheels and a brake mechanism.

The utility model relates to vertical machining center technical field, and public a kind of vertical machining center of foldable tool magazine structure, it include: fixed subassembly, the fixed subassembly includes machining center body, movable door, fixed block, fixed frame, plug-in rod and compression spring, the rear side of movable door is through pivot swing connection in the front side of machining center body, the rear side of fixed block and fixed frame is all fixedly connected in the front side of movable door, the left side of plug-in rod extends to the inside of fixed block and is penetrated through fixed frame, the surface of plug-in rod is sleeved in compression spring, the left side of compression spring is fixedly connected in the right side of plug-in rod, the right side of compression spring is fixedly connected in the inside of fixed frame, through fixed subassembly, when closing fixed movable door, the rebound force of compression spring drives plug-in rod to move left, makes the insertion of plug-in rod in the inside of fixed block, the stable fixation of movable door is prevented loose, through the slot, when plug-in rod is inserted and fixed, accurately inserted into the inside of fixed block.

The utility model provides a controllable micro-motion elastic internal fixation device with a bidirectional locking pressing plate structure, and belongs to the technical field of orthopedic medical instruments. Comprising a plurality of bridging rods; and the two end blocks are arranged at the two ends of the bridging rod. A stable frame structure is constructed through the combination of the bridging rod, the end block and the fixing screw, a fracture part is effectively connected and fixed in the axial direction, then a bidirectional locking mechanism is formed through the upper pressing plate, the lower pressing plate, the adjusting lead screw and the locknut, and the fracture part is locked by screwing the locknut. The distance and pressure between the pressing plates can be accurately adjusted and locked, dynamic force generated by factors such as muscle contraction and limb movement can be effectively resisted in the long-term use process, the pressing plates are prevented from loosening or displacing, and it is ensured that the fixing device always keeps the stable fixing effect; and the problems of poor fracture healing or malformation healing and the like caused by fixation failure are avoided.

The utility model provides a conveying belt frame fixing block machining fixing tool and belongs to the technical field of machining. Comprising a workbench, a fixing assembly and a machining assembly, wherein the workbench is provided with an inner cavity; the fixing assembly comprises a gear rotationally connected with the inner cavity. The connecting block is pushed to move through the air cylinder, then the toothed plate is driven to move transversely, the gear is driven to rotate through movement of the toothed plate, the toothed plate on the other side of the gear is driven to move oppositely while the gear rotates, and finally the two clamping plates are driven to move oppositely through opposite movement of the two toothed plates. At the moment, the fixing block is placed between the two clamping plates, the two clamping plates move towards the center position to fix the fixing block, the fixing firmness and stability of the fixing block can be improved, meanwhile, the fixing blocks of different sizes can be stably fixed, and the application range of the device is widened.

The guiding tube sheath comprises a multi-cavity tube and a handle, the multi-cavity tube comprises an outer tube and a plurality of inner tubes parallelly arranged in the outer tube in a penetrating mode, the tube wall of the outer tube is provided with a first positioning structure, the handle is provided with an insertion channel used for allowing the multi-cavity tube to be inserted in, and a second positioning structure is arranged in the insertion channel; the second positioning structure and the first positioning structure are connected in a matched mode in the radial direction of the multi-cavity tube so as to fix the handle and the multi-cavity tube. Through the cooperation of the first positioning structure and the second positioning structure, accurate positioning and stable fixing between the handle and the multi-cavity tube can be achieved, and the situation that the clinical operation of a guide tube sheath or an endoscope is affected due to the fact that the multi-cavity tube moves or rotates relative to the handle can be prevented; the guide tube sheath can be used for guiding the multi-cavity tube and providing support for improving the structural sealing performance of the multi-cavity tube and the structural sealing performance between the multi-cavity tube and the handle, so that the risk that germs on an endoscope are transmitted to the guide tube sheath is effectively reduced when the guide tube sheath is matched with the endoscope by enhancing the structural stability and sealing performance of the guide tube sheath.

The invention discloses a tissue retractor for urinary surgery, and relates to the technical field of medical auxiliary instruments, the tissue retractor comprises a bed body fixing mechanism, the bed body fixing mechanism comprises a U-shaped bearing frame, two threaded rods in threaded connection with the bottom surface of the bearing frame and rubber seats fixed at the top ends of the threaded rods, and the rubber seats are driven to ascend and descend by rotating the threaded rods; therefore, the device and the operating bed can be quickly clamped and stably fixed. Through mutual cooperation of a mounting beam plate, a positioning containing groove, a drag hook piece, a connecting block, a clamping hole, a clamping positioning column, a supporting hole, a limiting clamping plate, a movable pull rod, a supporting ring and a spring, preliminary positioning can be achieved through cooperation of the connecting block and the clamping positioning column, and then the spring drives the limiting clamping plate to be transversely inserted into the supporting hole; the clamping positioning column penetrates through the clamping holes in the connecting block and the limiting clamping plate at the same time, a triple locking structure is formed, the effect of rapidly locking the drag hook piece is achieved, and the drag hook piece is prevented from being disengaged in an operation.

This utility model relates to the field of sports equipment technology and discloses a detachable barbell assembly device, including a bar body. Multiple connecting rings are threaded onto the external surface of the bar body. Two counterweight wheels are threaded onto the external surface of the bar body. Connecting grooves are formed inside the counterweight wheels. A connecting block is fixedly connected to the top of the connecting groove. A driven groove is formed inside the connecting block. Two springs are fixedly connected to the bottom inner wall of the driven groove. A connecting block is fixedly connected to the top of the two springs. Multiple limiting holes are formed at the temporal portion of the connecting block, and positioning pins are provided on the inner wall of the limiting holes. This utility model enables quick installation and removal of the counterweight wheels. The spring self-adaptive structure and linkage engagement design are compatible with counterweight wheels of different sizes. By adjusting the position of the connecting rings and the elastic support, stable fixation of various specifications of accessories can be achieved.

This invention relates to the field of platinum-iridium ring assembly technology, and in particular to a medical catheter platinum-iridium ring assembly device based on elastic tension. The device includes a worktable and clamps for holding both ends of the catheter body. The outer side of the catheter body is used to fit the platinum-iridium ring. It also includes a back plate, which is located on the back of the worktable. The back plate has a slide rail, which includes a straight rail and a curved rail that are interconnected. A feeding clamp for feeding the platinum-iridium ring is slidably mounted on the slide rail. A tensioning assembly is also included, which is adjustable and movable above the front of the worktable. The tensioning assembly includes a tension clamp and upper and lower positioning clamps. This invention utilizes the elastic rebound of the catheter material to achieve reliable interference fit and locking of the ring. Stable fixation can be achieved with only a small stroke of rolling or crimping, avoiding the problems of ellipticization of the inner lumen and local flattening caused by traditional large deformation crimping.

The application relates to the technical field of medical devices, and discloses an interventional surgery robot and an interventional surgery system. The interventional surgery robot is provided with a mounting module fixed to a mounting base, one side of the mounting module is rotatably connected with the mounting base, and the other side is provided with a fixing structure which is detachably connected with the mounting base. Therefore, the mounting module can be completely fixed to the mounting base, so that a Y-shaped valve arranged on the mounting module can be kept relatively static during the whole surgery process, and the problem that the surgery fails due to movement of the Y-shaped valve does not occur. Before the surgery, the fixing structure needs to be separated from the mounting base, and the mounting module needs to be rotated by a certain angle around a rotating mechanism to a height at which a surgeon can conveniently install an instrument; after the instrument is installed, the fixing structure needs to be fixed to the mounting base, so that the mounting module and the Y-shaped valve are stably fixed to the mounting base, and the interventional surgery can be conveniently completed.

The invention belongs to the technical field of injection auxiliary fixing devices, and particularly relates to a peripheral nerve injury drug delivery auxiliary injection device which comprises a fixing seat, the fixing seat comprises a clamping plate, an adjusting belt is arranged on the clamping plate, an injection position is formed in one side of the clamping plate, and the clamping plate is connected with a bearing table through a connecting plate; a palm groove and a thumb groove are formed in the bearing table, a bearing groove is formed in the top of the bearing table, an adjusting table is installed in the bearing groove, a bearing frame is installed in the adjusting table, an assembly fixing groove is formed in the bearing frame, and a screw joint ring is installed in the assembly fixing groove. The invention aims to provide the auxiliary injection device for peripheral nerve injury drug delivery, the problems that existing manual injection is inaccurate in positioning, poor in stability and inconvenient to operate are solved, accurate alignment of injection positions, stable fixation of limbs of a patient and flexible adjustment of injection angles and heights are achieved, the operation intensity of medical staff is reduced, and the operation efficiency is improved. The drug delivery effect is improved.

This utility model discloses an automotive inspection fixture clamping device, including a third mounting base. The upper left side of the third mounting base is connected to a clamping arm for clamping the workpiece under test via a rotating connector. A clamping element is connected to the upper end of the clamping arm. A pulling element is provided on the left side of the third mounting base for pulling the clamping arm to one side, thereby driving the upper end to clamp the workpiece under test. A support element is provided at the bottom of the pulling element. Through the arrangement of the rotating connector, the clamping element, and the pulling element, the rotating connector allows the clamping arm to rotate flexibly. Even in a confined space, it can avoid the obstruction of the outer panel by rotation and successfully clamp the workpiece under test from the reverse side. The clamping element can directly act on the workpiece under test to achieve stable fixation. At the same time, the pulling element provides stable power in a confined space and accurately controls the clamping force.

The invention relates to assembly and disassembly of electronic devices, e.g. power modules or MEMS modules. In that context, the invention is situated at the intersection of advanced assembly of electronic devices and environmental sustainability. It addresses the critical need for Robust Eco-Design (RED) with design in the 7R setting. For that purpose, the invention foresees to equip components of the electronic device which are to be fixed to each other, e.g. a heat sink, a substrate, and a semiconductor chip, with interlocking arrangements which can be securely fixed to each other with a shrink fitting procedure. This allows, on the one hand, stable fixation of the components and, on the other hand, simple separation of the components for the purpose of disassembling the electronic device.

The utility model discloses a watchcase decorative ring fixing structure, and belongs to the field of watchcase decorative rings. A watchcase decorative ring fixing structure comprises a watchcase, a watchband fixed on the outer side of the watchcase, a dial fixed on the upper side of the watchcase, a watch bezel arranged on the outer side of the dial, a lens fixed on the upper side of the watch bezel, a decorative ring arranged on the outer side of the watch bezel, and a watch bottom cover fixed on the lower side of the watchcase. A reliable and stable fixing system is formed through combined use of the fixing block, the bolt, the compression spring and the pressing block, the decorative ring is effectively fixed in the vertical direction and the horizontal direction, the overall attractiveness of the watch is improved, the durability of the watch is enhanced, and the watch is convenient to use. And meanwhile, the decorative ring can be stably fixed on the watchcase, so that the problem that the decorative ring is easy to loosen and fall in the prior art is solved.

The utility model discloses a novel positioning tool which comprises a bottom plate, a supporting frame is arranged on the upper surface of the bottom plate, the movable end of the supporting frame is rotationally connected with two corresponding clamping structures, and the supporting frame is provided with a driving assembly for driving the two clamping structures to rotate in the face-to-face or back-to-back mode. The clamping structure comprises an arc-shaped frame, an inner template matched with a to-be-machined part is arranged on the inner side of the arc-shaped frame, a protruding block is arranged at the movable end of the arc-shaped frame, and a locking assembly used for limiting the protruding block is arranged on the bottom plate. The clamping device has the beneficial effects that the clamping structure can be flexibly controlled to be unfolded and folded through the driving assembly, the clamping structure is matched with the locking assembly to loosen and lock the protruding block, a workpiece can be assisted to be disassembled and clamped, and overall operation is simple and rapid; in the machining process, it is ensured that the clamping structure stably fixes the workpiece, the high precision and safety in the machining process are improved, and the workpiece is effectively prevented from moving or loosening in the machining process.

The invention discloses an expandable fixing catheter, and belongs to the technical field of medical instruments. The urethral catheter comprises a catheter body, and a urethral catheterization channel and an expansion guide channel which are independent of each other are arranged in the catheter body. A drainage hole communicated with the catheterization channel is formed in the far end of the catheter body, an expansion section which is provided with a closed inner cavity and can expand elastically is arranged on the near side of the drainage hole, and an expansion operation end communicated with the expansion guiding channel and a drainage connector communicated with the catheterization channel are arranged at the near end of the catheter body; a spiral guide rope sleeve and a pulling rope penetrating through the spiral guide rope sleeve are arranged in the inner cavity, a medicine feeding hole communicated with the inner cavity is formed in the outer wall of the expansion section, and an elastic sealing ring of a dynamic sealing structure in axial sliding fit with the pulling rope is arranged in the expansion guide channel. The catheter is stably fixed through traction mechanical expansion, the risk of air bag breakage and leakage is avoided, urethra targeted drug delivery and whole-course anti-leakage sealing are synchronously achieved, the problems that an existing catheter is poor in fixing reliability and prone to infection, and the urethra is prone to being damaged when the catheter is pulled out are solved, and the catheter is suitable for clinical urine indwelling drainage operation.

The utility model relates to the technical field of oil cylinder disassembling tools, and discloses an oil cylinder disassembling tool which comprises a sleeving barrel, a rotating disc and a plurality of fastening blocks, a plurality of cross-shaped grooves are formed in the edge of the upper surface of the sleeving barrel, the rotating disc is arranged outside the sleeving barrel in a sleeving mode, a plurality of cross-shaped blocks are fixedly connected to the edge of the inner wall of the rotating disc, and a plurality of fastening blocks are fixedly connected to the edge of the inner wall of the rotating disc. The lower surfaces of the cross blocks are tightly attached to the inner bottom face of the cross groove, a sleeving groove is formed in the middle of the lower surface of the sleeving cylinder, a plurality of positioning rods are fixedly connected to the edge of the inner top face of the sleeving groove, and the outer walls of the sides, close to the center of the sleeving cylinder, of the fastening blocks are tightly attached to the outer wall of the sleeving cylinder. According to the oil cylinder disassembling tool, the rotating disc is ingeniously matched with the sleeving barrel, and the fastening block and the connecting rod are stably fixed, so that the oil cylinder disassembling tool realizes a rapid and stable disassembling process, and the working efficiency is improved.