14results about How to "Avoid direction shift" patented technology

The invention relates to a marine steel structure welding device which comprises a base, a welding gun and a sliding guide rail. The sliding guide rail is installed on the base, and a sliding seat used for welding, clamping and fixing is installed on the sliding guide rail in a matched mode. The lower end of the base is provided with a first magnetic attraction part used for enabling the base to be attracted and fixed to a steel structure, one side of the lower end of the base is further provided with a moving part provided with a second magnetic attraction part, and the moving part is in sliding connection with the base and can move relative to the base in a linear mode. The relative linear moving direction of the moving part and the base is the same as the moving direction of the sliding seat along the sliding guide rail. According to the marine steel structure welding device, the first magnetic attraction part and the second magnetic attraction part are attracted to a steel structure, the situation that instability occurs in the welding process due to the influence of wind power and the like is avoided, and the sliding guide rail is arranged so that the welding gun can linearly move along the sliding guide rail in the welding process to achieve linear continuous welding.

The utility model relates to the technical field of oral implanting tools, and discloses an internal water spraying type guide ring structure which comprises a guide ring body, a sliding resisting assembly is arranged at the bottom of the guide ring body and comprises a clamping ring, a clamping block, a movable clamping plate and a fixed ring, the clamping ring is movably connected with the guide ring body, the clamping block is fixedly connected with the clamping ring, and the movable clamping plate is elastically connected with the clamping ring. The fixing ring is in threaded connection with the guide ring main body and is clamped with the clamping block; the water conveying hole channel is formed in the clamping ring and is far away from the movable clamping plate and the clamping block while being far away from the smooth surface of the drill bit, the drill bit can be better fixed through the clamping block and the movable clamping plate without water source lubrication, and then the anti-sliding effect is achieved, so that the deviation phenomenon caused by high-speed rotation of the drill bit is avoided, and falling and direction deviation of the drill bit are avoided; therefore, safety accidents are avoided.

This application discloses a method, apparatus, device, and storage medium for generating perturbation samples based on finite mean value curvature estimation sampling, relating to the field of model security assessment technology. The method includes: acquiring original image samples and corresponding ground truth labels; sampling within the neighborhood of the original image samples to obtain local sampling points; updating the curvature of each local sampling point and the original image samples using finite mean value estimation to obtain adversarial image samples; and determining target perturbation samples based on the original image samples, the ground truth labels, and the adversarial image samples. This application guides sample updates through finite mean value curvature estimation, enabling the capture of nonlinear curvature information of lost terrain, improving the accuracy of perturbation direction, thereby generating adversarial samples with smaller perturbation amplitudes, and enhancing the accuracy and efficiency of model security assessment.

The invention provides a police service training system based on virtual simulation practical training, the system comprises a virtual simulation practical training platform, a standard library management system, a practical training control system and a training course editing system are built in the virtual simulation practical training platform, the practical training control system is used for adjusting virtual simulation equipment and training field regulation and control equipment, and the training course editing system is used for editing training courses. The training field regulation and control equipment comprises a first guide rod, a second guide rod, winding and unwinding mechanisms and a warning assembly, the middle of the first guide rod is sleeved with a sliding sleeve, a supporting frame is integrally formed at the top of the sliding sleeve, a buzzer is in threaded connection with the top of the supporting frame, and the winding and unwinding mechanisms comprise the first winding and unwinding mechanism and the second winding and unwinding mechanism. According to the invention, site limitation can be flexibly regulated and controlled, an alarm function after edge approaching is provided, direction indication can be provided all the time, and the purposes of large-range early warning and equipment cost reduction are taken into account.

The utility model relates to the field of LED manufacturing, and particularly discloses an LED taping device which comprises a tape winding prevention structure, a pressing device and a conveying device, the tape winding prevention structure comprises a carrier tape reel, a glue film reel and a plurality of rotating wheels, and the pressing device comprises a heating plate, an air cylinder, a positioning block, a push-pull plate, a push rod and a punching push rod. The conveying device comprises a driven rotating wheel, a driving rotating wheel and a rotating motor, the driven rotating wheel is attached to the driving rotating wheel, the driving rotating wheel is connected with the rotating motor, the multiple rotating wheels are arranged, the tightness degree can be adjusted when the carrier tape and the adhesive film are fed, and the problems of wrinkles and overturning in the taping process can be avoided.

The utility model provides a metal plate bending device, and relates to the technical field of metal plate bending, the metal plate bending device comprises a bottom plate and a hydraulic bending assembly, a metal plate bending auxiliary assembly is arranged on the upper portion of the bottom plate, the metal plate bending auxiliary assembly comprises a bending base arranged on the upper portion of the bottom plate, a bending groove is formed in the bending base, and the hydraulic bending assembly is arranged in the bending groove. A bending groove is formed in the upper portion of the bending base, a moving block slides in the bending groove, an arc-shaped bending groove is formed in the side wall of the bending base, a fixing plate is fixedly connected to the upper portion of the bottom plate, and a first threaded rod is rotatably connected to the interior of the bottom plate. The problems that the radian of a bending groove is fixed, so that various bending radians cannot be adjusted according to customer requirements, and particularly, various bending machines have to be adopted for operation when automobile metal plate bending tasks are processed are solved.

The invention belongs to the technical field of shear force testing, and specifically is a large-scale direct shear instrument for testing a model test of the horizontal shear bearing capacity of a composite foundation, comprising a support part, a control mechanism and a detection mechanism; the support part comprises a bearing bracket, an upper detection mold frame, a lower detection mold frame, an upper fixed crossbeam and a side closed template, the lower detection mold frame is fixedly installed on the upper end surface of the bearing bracket, and the upper detection mold frame is arranged directly above the lower detection mold frame; the upper fixed crossbeam passes through the upper detection mold frame and is fixedly connected to the side walls of the bearing bracket at both ends, and the side closed template is detachably installed between the upper detection mold frame and the lower detection mold frame; the detection mechanism comprises a top pressure plate and a pressure sensor fixedly installed on the side wall of the top pressure plate; the control mechanism comprises a control cylinder, an installation box and a control shaft, the installation box is fixedly installed on the bearing bracket, and the control shaft is slidably installed in the inner cavity of the installation box; the above-mentioned structures are coordinated to improve the accuracy of the test results and meet the actual use requirements.

The utility model belongs to adhesive tape processing technical field discloses a slitting equipment, the existing slitting equipment can cut the adhesive tape roll into different length, but the prior art needs manual regulation position of adhesive tape roll when using, and there is inconvenient to use, the utility model example's technical scheme, including base, the top surface fixed mounting of base has the mounting bracket, the even distribution's transmission shaft that a few rotate and install on the mounting bracket, transmission shaft is arranged obliquely, one side of mounting bracket is provided with the abutment plate, be provided with the adjusting device that moves the abutment plate on the mounting bracket, the fixed mounting of mounting bracket has the fixed frame, the fixed frame is provided with the compression device that can carry out the compression of adhesive tape roll, sets up the sawtooth between transmission shaft and abutment plate, the utility model sets up the transmission shaft that is arranged obliquely, makes the adhesive tape roll under the action of gravity, can realize automatic feeding, secondly through the cooperation of compression device and abutment plate, it is convenient to adjust the cutting length of adhesive tape roll and realizes the discharge of cutting adhesive tape roll, and it is convenient to use.

The utility model discloses a damping structure in the drawing process of a special alloy microwire, which comprises a main body support, a die support is arranged at one end of the top of the main body support, a drawing die is arranged on the die support, and a sliding chute is arranged at one end of the die support; according to the device, the first pulleys and the second pulleys are arranged, the first pulleys are matched with the first sliding grooves, the first connecting rods, the first connecting blocks and the first spring rods to form a sliding structure, and the two second pulleys are matched with the two second sliding grooves, the two second connecting blocks, the two second connecting rods and the two second spring rods to form a sliding structure; the microfilament passes through the first pulley and the two second pulleys in sequence, when tension is increased, the first pulley can slide downwards along the first sliding groove under extrusion of the microfilament, and meanwhile, the two second pulleys slide upwards along the two second sliding grooves correspondingly, so that friction force and vibration force brought by the tension are reduced, and the risk that the microfilament is broken is prevented.

The utility model relates to the field of laser equipment, and discloses a protection type handheld laser marking machine which comprises a main machine and a marking machine head, the main machine is in signal connection with the marking machine head through a transmission line, a protection mechanism is arranged on the lower portion of the marking machine head and comprises a protection frame, the lower surface of the protection frame is fixedly connected with a contact piece, and the contact piece is connected with the main machine. A mounting frame is fixedly connected to the outer wall of the protection frame, an air pressure block is fixedly connected to the inner wall of the mounting frame, a piston plate is connected to the inner wall of the air pressure block in a piston mode, vent holes are formed in the inner wall of the piston plate, and a connecting rod is fixedly connected to the end, away from the marking machine head, of the piston plate. According to the utility model, through the arrangement of the protection mechanism, the impact force of an external object can be effectively buffered when the external object impacts towards the direction of the marking machine head, and the rear baffle plate does not move back and forth, so that the effect of preventing the marking machine head from deviating and causing danger due to the impact of the external object is achieved.

The utility model provides a sign board convenient to disassemble and assemble, and relates to the technical field of industrial design and identification. A groove; the sign board is fixedly mounted on one side of the sign board, and a handheld hole is formed in one side of the surface of the front end of the sign board; and the fixing device is arranged behind the sign board in an attached mode and used for fixing the sign board. The fixing device is arranged, the base, the spring A, the sliding rod, the clamping groove, the rubber block and the handle are used in cooperation, the sliding rod is pulled, rapid fixing of the signboard is achieved, damage to an installation carrier and the signboard in traditional binding and welding modes and the like is avoided, the disassembly and assembly efficiency is remarkably improved, repeated utilization is achieved, and the practicability is high. Meanwhile, through the arrangement of the handle, the indication board can be conveniently driven to move, the device can be conveniently fixed to the wall surface through the cooperation of the external hook and the handle, the vertical installation display requirement is met, the use scene is greatly expanded, and the practicability of the indication board is further improved.

The invention discloses a cartilage partial defect transplantation component, comprising: a fixing nail, a sliding hammer, a guide tube, and a guide needle; the fixing nail is composed of a nail body and a nail cap, wherein the nail body is in a triangular pyramid shape; the sliding hammer is composed of a hammer rod, a hammer body, a limiting part, and a head end, wherein the lower part of the hammer rod is connected to the head end, and the hammer rod is provided with limiting parts at positions close to the upper and lower ends, and the hammer body is slidably installed on the hammer rod between the two limiting parts; the upper and lower ends of the guide tube are open, and the interior is hollow, and the guide needle can pass through the guide tube; the fixing nail structure of the invention can reduce resistance and wear on bone during implantation, and can be implanted in a vertical force direction without the need for rotational implantation like a threaded nail, thereby reducing damage to bone caused by frictional heat; the guiding effect of the guide needle can avoid directional deviation during implantation; the sliding hammer applies force to implant the fixing nail; the detachable connection structure of the sliding hammer and the nail cap can not only implant the fixing nail, but also apply force in the opposite direction to remove the fixing nail.

The utility model discloses a kind of porcelain push rod clamping equipment, it is related to porcelain push rod clamping technical field, the porcelain push rod clamping equipment, including mounting seat, the lower end of mounting seat is provided with clamping assembly, the upper surface of mounting seat is provided with moving groove, and one side of the moving groove is provided with adjusting assembly, the adjusting assembly includes adjusting plate, hinge is arranged at the junction of adjusting plate and mounting seat, and adjusting plate is rotatably connected with mounting seat by hinge, the upper surface of adjusting plate is provided with limit sliding slot, the both sides of limit sliding slot bottom end are provided with adjusting groove, and adjusting groove transversely penetrates adjusting plate, the scheme has solved the problem that most of existing clamping equipment is single clamping, processing efficiency is low, when clamping multiple porcelain push rod, porcelain push rod needs to be installed and disassembled independently multiple times, leading to installation and disassembly time-consuming and laborious, poor flexibility.

This invention provides a device for assisting in the precise and rapid placement of distal tibiofibular screws, relating to the field of medical devices. Its features include: a steel plate with multiple threaded holes; a sleeve mounted on the steel plate, the sleeve matching the threaded holes; a hollow tube on one side of the sleeve; a telescopic mechanism between the sleeve and the hollow tube; a fixing mechanism connecting the telescopic mechanism and the hollow tube; a measuring mechanism rotatably mounted on the hollow tube; and the telescopic mechanism including a first telescopic rod, one end of which is fixedly connected to the sleeve. The advantages of this invention are: by providing stable bone surface fixation, precise placement path guidance, a quickly adjustable and locking telescopic structure, reliable angle fixation, and real-time intraoperative depth and angle monitoring, it significantly improves the accuracy, repeatability, and surgical efficiency of distal tibiofibular screw placement, while reducing the risk of complications.