9results about How to "Keep it tight" patented technology

The utility model relates to the technical field of rail transit, in particular to a steel rail fastener, which comprises a fastener mechanism, a steel rail fastener and a fastener, the limiting mechanism slides on the bolt and can limit and buffer the fastener; and the compression-resistant mechanism slides on the bolt, is positioned above the limiting mechanism and can be used for buckling and pressing the steel rail. According to the utility model, the limiting block I and the limiting block II are matched with each other to limit the limiting seat, so that the limiting block III is accurately attached to the bottom of the steel rail, the displacement of the steel rail in the horizontal direction is effectively prevented, and a stable supporting foundation is provided for the steel rail; part of impact force generated when a train runs can be buffered, friction and abrasion between the sleeper and the limiting base are reduced, the service life of the sleeper and the service life of the limiting base are prolonged, and meanwhile the stability of the whole fastener system can be improved.

The utility model discloses a novel non -out sleeve pipe combination screw, including screw, open snap ring and sleeve. Screw is by screw rod, transition rod and nut and is composed, and the front section of screw rod is equipped with screw thread, and the back section is equipped with annular clamping groove, open snap ring is detachably connected in annular clamping groove, and its normal internal diameter is less than the outer diameter of screw rod and can be elastically pressed into annular clamping groove, sleeve is equipped with inner hole, and the side of inner hole close to nut is equipped with annular inner step, and its inner diameter is greater than the outer diameter of open snap ring compression state and less than normal external diameter, and the edge of annular inner step is equipped with R angle structure. The utility model discloses the cooperation design of open snap ring and annular inner step, effectively prevent sleeve accidental separation, enhance the stability of connection, R angle structure reduces assembly resistance, avoids the damage of traditional stamping assembly to plating, improves corrosion resistance. In addition, the right angle structure and transition groove design of annular inner step far from nut side further improve the fatigue resistance and limiting effect.

The utility model discloses an automatic yarn tension adjusting device which comprises an installation frame and two guide rollers, the two guide rollers are located on the two sides of the installation frame respectively, a tensioning assembly is installed outside the installation frame, and the tensioning assembly comprises a supporting frame rotationally connected with the interior of the installation frame through a bearing. A tensioning wheel is rotationally connected to each of the two ends of the supporting frame, a gear is coaxially fixed to the rotating end of the supporting frame, a vertically-arranged limiting guide rail is fixedly connected to the outer portion of the mounting frame through a supporting frame, a rack matched with the gear slidably sleeves the outer portion of the limiting guide rail, and a balancing weight is fixedly connected to the outer portion of the rack; according to the utility model, through the arrangement of the tensioning assembly, when the yarn is loosened, the loosening state can be eliminated in time, and the risk of production delay caused by manual adjustment lagging is effectively avoided, so that the stability of the product quality is ensured.

This invention relates to the field of extrusion processes and discloses a plastic hose forming apparatus, comprising an extrusion mechanism, a die head, a shaping mechanism, and a suspension and pressure control mechanism connected in series. The output end of the die head is connected to the input end of the shaping mechanism via a heat-insulating sleeve. The suspension and pressure control mechanism includes a suspension base and a plug suspended within the extruded hose. The plug has a diameter smaller than the inner diameter of the extruded hose and a circumferential gap, allowing a section of the extruded hose within the shaping mechanism to be partially blocked by the die head and the plug, forming a dynamic pressure boosting section. A pressure output port is located at the center of the die head's output end, supplying pressure to the dynamic pressure boosting section. Continuous air supply and pressure boosting maintains dynamic stability of the pressure in the dynamic pressure boosting section within the shaping mechanism. When the outer layer material of the multi-layered hose is adsorbed, the inner layers are pushed outward by pressure, maintaining a compressed state between the layers, promoting molecular diffusion, and enhancing interlayer bonding.

The utility model discloses an eccentric bolt, and relates to the field of eccentric bolts, the eccentric bolt comprises a bolt head, the bolt head is provided with threads, one end of the bolt head is fixedly provided with a head plate, the bolt head is provided with a circular groove, and the tail end of the bolt head is in threaded connection with a nut. On the basis of an existing bolt head, the circular groove is cut, so that the bolt head can be placed in the circular groove for installation and positioning, the nut is screwed at the tail end, overall installation and positioning can be completed, convenience and flexibility during installation can be achieved, and the installation efficiency is improved. Under the matching action of the first reinforcing teeth and the like on the first gasket, the contact area can be increased, the pressure stress of the pressure-bearing surface can be reduced, the surface of a connected piece is protected, meanwhile, the excellent durability is achieved, and under the strong vibration environment, the service life of the connected piece is prolonged. The anti-loose gasket can effectively keep the clamping force of the connecting piece, and bolt looseness caused by vibration is prevented.

The utility model relates to the technical field of bagging, in particular to a chopstick bagging device which is provided with a conveying assembly of an annular conveying chain / belt, the annular conveying chain / belt is provided with a feeding side and a discharging side, and a plurality of material grooves are formed in the outer annular face of the annular conveying chain / belt. A bag opening structure located on the discharging side and a lifting assembly driving the discharging side of the annular conveying chain / belt to move in the bag opening structure in the Z-axis direction are arranged on the conveying assembly, and a counterweight assembly movably connected with the conveying assembly in the Z-axis direction and moving with the feeding side of the annular conveying chain / belt is further arranged on the conveying assembly. A guide structure is arranged between the conveying assembly and the lifting assembly and / or the counterweight assembly, and the movement direction of the lifting assembly is opposite to the movement direction of the counterweight assembly, so that the annular conveying chain / belt conducts telescopic movement. According to the chopstick bagging device, ordered bagging of chopsticks is achieved, the requirement for manual intervention is reduced, the production efficiency is improved, and the production process is more efficient and stable.

The utility model discloses a fixing frame for public security monitoring installation, which comprises an installation plate, four corners of the installation plate are respectively provided with an installation hole, and the middle part of the installation plate is fixedly provided with a fixing frame. One end of the positioning clamping plate can be easily clamped and loosened by the clamping block by operating the adjusting sliding block, and the other side of the positioning clamping plate is operated by matching the screw rod with the extrusion plate, so that the mounting bracket is convenient to mount and dismount, a large number of connecting pieces such as bolts are not needed, and the mounting and dismounting efficiency is greatly improved; meanwhile, a supporting spring and a limiting spring are arranged, so that stable clamping of a positioning clamping plate by a clamping block is guaranteed, the overall structure of the fixing frame is more stable, external force impact can be effectively resisted, and the situations of looseness and displacement are reduced; in addition, the adjustable bending clamping frames on the two sides of the mounting bracket can limit and fix the mounting end of the camera after the camera is mounted, and the bending clamping frames can be quickly rotated in the later period to realize independent disassembly of the camera.

The utility model discloses a yarn twist experiment device, which belongs to the technical field of yarn twist experiments and comprises a twist experiment test box, a rotating shaft is fixedly mounted at the output end of the twist experiment test box, and a yarn clamping frame is fixedly mounted on one side of the rotating shaft. A moving frame is fixedly mounted on one side of the twist experiment test box, a sliding seat is slidably mounted on the inner side of the moving frame, and a mounting plate is fixedly mounted at the output end of the sliding seat; a second knob is controlled to drive a lead screw to rotate, the lead screw can drive a sliding frame and a control rod to move through thread fit, the control rod can control a sliding clamping plate after moving, and therefore yarn is clamped and fixed by the sliding clamping plate, a control handle is controlled to drive a threaded rod to rotate, and the yarn is clamped and fixed. The threaded rod can drive the lower pressing plate to descend through threaded fit, and the lower pressing plate can press and fix the other end of the yarn after descending.

This utility model discloses a sliding groove limiting ring nut for automobiles, including a nut with a protruding structure fixedly connected to its bottom. A limiting washer is provided at the bottom of the protruding structure. Two square grooves are formed on the nut, and a first moving block is provided in each of the two square grooves. The first moving blocks are slidably connected to the nut. A first inclined surface is provided on the side of each of the two first moving blocks that is far apart from each other. A second moving block is provided at the bottom of each of the two first inclined surfaces. A second inclined surface is provided on the side of each of the two second moving blocks that is close to each other. A fixing rod is fixedly connected to the bottom of each of the two fixing rods. A limiting rod is fixedly connected to the bottom of each of the two fixing rods. Two limiting grooves are formed on the limiting washer, which are adapted to the limiting rods. A first spring is sleeved on the fixing rod. This utility model effectively limits the reverse rotation of the nut, effectively maintains the tightness between the nut and the bolt, prevents loosening, and enhances the stability of the overall connection.