112results about How to "Improve fit tightness" patented technology

The invention provides a railway vehicle and a hook buffer device thereof. While curve pass is realized, a connecting structure is simplified, a fit clearance is reduced, and the fitting tightness between a tail hook pin and a pin hole is improved. The hook buffer device comprises a front slave plate base, a rear slave plate base and a bidirectional buffer, wherein the front slave plate base and the rear slave plate base are connected with a vehicle body; the bidirectional buffer is fixedly connected between the front slave plate base and the rear slave plate base and is provided with a carrying body with a buffering function and a connecting component acting on the carrying body; the connecting component is hinged to a vehicle hook through the tail hook pin; the tail hook pin extends up and down; a rotating component is assembled between at least one of the connecting component and the vehicle hook, and the tail hook pin, so that the connecting component and the vehicle hook relatively rotate in a vertical plane; the rotating component is matched with the connecting component and the vehicle hook, so that relative displacement between the connecting component and the vehicle hook in the front-back direction is limited. Due to the fact that the vehicle hook and the connecting component can be relatively fixed in the front-back direction, no matter in an assembling state or various working states, the longitudinal impact caused in a vehicle driving process can be obviously reduced, the usability of the vehicle is improved, and the abrasion is reduced.

The invention relates to a novel die for continuously extruding aluminum pipes, aluminum alloy pipes and special-shaped hollow profiles, comprising a die arranged in a cavity in an integral structure. A front deflector of the die, which is provided with at least three special-shaped shunt holes, is connected with an upper die of the die; the shunt holes of the front deflector form an inclined angle; a die core arranged on the upper die forms the inside diameter of a pipe, and a lower die connected with the upper die is provided with a welding cavity and a mold; the shunt holes of the front deflector form the angle of 18-20 degrees; the upper die and the lower die of the die are positioned by pins and are connected by screws; the die is connected with the cavity by a locking nut; the diameters of the upper die and the lower die are from 60*52-0.1mm to 60*52+0.1mm; and the mold and the die core are made of hard alloy materials. The invention improves the production efficiency of the aluminum alloy extrusion pipes or the special-shaped profiles by approximate 15 percent, decreases the production cost, prolongs the service life longer than twice, can produce the aluminum alloy pipes and the special-shaped profiles in various shapes and specifications and has good product quality and wide economic benefits.

The invention belongs to the technical field of diesel engine maintenance tools and relates to a diesel engine injector water spacer extractor comprising a support beam and support screws arranged on the support beam. The support beam is further provided with a pull screw connected with an expansion pull sleeve; the expansion pull sleeve is composed of a connecting part and an expansion pull part; the connecting part matches with the pull screw; the expansion pull bar is connected with a water spacer. The water spacer is extracted by: inserting the expansion pull sleeve into the water spacer, tightening the pull screw into the expansion pull sleeve to expand the expansion pull sleeve and tightly combine with the water spacer, and downwardly turning a pull nut on the pull screw to downwardly separate the expansion pull sleeve from the pull screw and to drive the water spacer to constantly move down. The diesel engine injector water spacer extractor has the advantages that the water spacer is more convenient to extract, operating efficiency is improved, the water spacer is also protected from damage, and the diesel engine injector water spacer extractor is applicable to popularization and application in extracting water spacers from diesel engine injectors.

The invention relates to a closing-in and forming stamping die for a close cover of an automobile fuel tank, which has good sealing property of a product. The closing-in and forming stamping die comprises a lower die, an upper die and a movable cone die, wherein the movable cone die is in a ring structure and is positioned between the lower die and the upper die; the lower die comprises a lower die plate on which a lower die cushion and a lower open die are fixedly installed; the lower open die is in a ring structure; the lower die cushion is positioned in the lower open die; the movable cone die and the lower open die are corresponding to each other up and down; the upper die comprises an upper die plate below which a closing-in backing plate is fixedly installed; a forming open die is fixedly installed below the closing-in backing plate; the forming open die, the closing-in backing plate and the movable cone die are corresponding to each other up and down; a connecting cushion cover is installed in the middle of the upper die plate; an air cylinder is fixedly installed on the connecting cushion cover; a conical rod is fixedly installed at the lower end of the piston rod of the air cylinder; a conical head is fixedly installed at the lower end of the conical rod; a die plate flange is installed below the connecting cushion cover; a dovetail die plate is fixedly installed below the die plate flange; and a slide block die plate is arranged on the dovetail die plate.

The invention discloses a heating and ventilation pipeline fixed installing structure realizing tight attachment, and belongs to the technical field of heating and ventilation pipeline installation. The heating and ventilation pipeline fixed installing structure comprises a heating and ventilation pipe, a transmission screw rod, installing assemblies, a driving gear, an oiling assembly, an attaching sleeve and a winding roller, wherein an installing frame and an installing block are fixedly installed on the outer wall of one side of the heating and ventilation pipe, and a first rocking handleis rotatably mounted in the installing frame in a penetrating manner. A movable mounting sleeve is mounted, the mounting sleeve is mounted on the transmission screw rod, when the heating and ventilation pipe is fixedly installed, only a bottom plate of the mounting sleeve needs to attach to the mounting surface, when the heating and ventilation pipe is fixedly mounted, the first rocking handle isrotated to drive the driving gear to rotate, so that the transmission screw rod with a driven gear is driven to rotate, therefore, the position of the mounting sleeve on the mounting surface can be quickly changed, meanwhile, connecting studs of the installing assemblies of the mounting sleeve are aligned with threaded holes in the mounting surface, fixed installing is carried out through direct rotating, then the adjustment for the installing is convenient and quick, and the whole heating and ventilation pipe does not need to be moved.

The invention discloses a method for processing and forming a pipe fitting connection end of a motorcycle frame. The method comprises the following steps: a, a notch is pre-processed, namely, the notch is processed at the pipe fitting connection end, wherein the depth of the notch is not less than that of arched grooves in the need of being processed; and b, the arched grooves are processed by adopting a die, a punching die is adopted for carrying out punching from top to bottom;, when the punching die is used for carrying out punching, the cutting edge at the lower end cuts in from the innermost edge of the notch, and the two needed arched grooves are punched at the pipe fitting end to be processed after being punched by the punching die. The method disclosed by the invention is capable of greatly increasing the bonding tightness when one pipe fitting is connected with another pipe fitting, so that the welding quality is improved, and the connection intensity is increased; furthermore, the method is suitable for pipe fittings connected in any angle; the pipe diameter application range about the pipe fittings is also very wide; meanwhile, the method disclosed by the invention has the characteristics of high efficiency and low cost and is applied to large-scale popularization and application.

The invention discloses a tiebar fixing device for a die casting machine and the die casting machine including the same. The tiebar fixing device comprises a support base component, wherein the two ends of the support base component are respectively connected with an oil cylinder component and a tiebar; a connecting part is arranged at the end part, connected with the tiebar, of the support base component; and an outer edge of the connecting part is projected at the outer edge of the end part of the support base component. The tiebar fixing device further comprises a gland; a step through hole is formed in the gland; the end part of the support base component and the connecting part are inserted into the step through hole of the gland in a gap fit manner; gland is fixedly connected with the end part of the tiebar; and the die casting machine comprises the tiebar fixing device. When the oil cylinder component pulls out or inserts in the tiebar, the tiebar cannot rotate along with the rotation of the support base component, so that the fit tightness of parts of the die casting machine is improved, and the pass percent of products produced by the die casting machine is improved.

The invention relates to a self-service film pasting machine which is used for pasting protective layers to different electronic equipment in a self-service mode. The self-service film pasting machinecomprises a first positioning device, a second positioning device, a first film pasting device and a second film pasting device, wherein the first positioning device and the second positioning deviceare mutually independent, and the first film pasting device and the second film pasting device are mutually independent; the first positioning device is used for positioning the protective layer, andthe second positioning device is used for positioning the electronic equipment; the first film pasting device obtains the protective layer from the first positioning device and pastes the protectivefilm to the positioned electronic equipment to complete primary pasting of the protective layer and the electronic equipment; and the second film pasting mechanism comprises a cavity cover, a cavity capable of containing different electronic equipment is formed in the cavity cover, and an air bag is arranged in the cavity to extrude the protective layer on the electronic equipment contained in thecavity so as to carry out secondary pasting. The invention further provides a film pasting method of the self-service film pasting machine, and the self-service film pasting machine and the film pasting method thereof have the advantages of being tight in pasting, free of bubbles and the like.

The invention relates to the electrical equipment field, especially a quick coupler for in-out cables of a high- voltage switch cabinet which is characterized by comprising a hollow inner conductor; the hollow inner conductor comprises a columnar part and a tapered part; the tapered part and the columnar part are equipped with oppositely arranged first ends and second ends; the end of the tapered part connected with the columnar part is constructed into the first end; the other end is constructed into the second end; an externally convex clamping structure is arranged at the periphery of the tapered part close to its first end; an elastic slot is arranged at the port of the second end of the tapered part; the end of the columnar part connected with the tapered part is constructed into the first end; the other end is constructed into the second end; a number of shrinkage slots are evenly arranged on the inner conductor along the periphery; the invention also comprises an elastic element sleeving the periphery of the columnar part, and hollow insulation sleeves coating the peripheries of the inner conductor and the elastic element; the insulation sleeves are made of an insulation soft material. The invention can quickly connect the cables, saves connecting time and is good in insulation performance and sealing performance.

The invention relates to a light guide plate, a backlight module and a display device thereof. The light guide plate comprises a plate body and an optical microstructure pattern, wherein the optical microstructure pattern is distributed on the surface of the plate body and comprises a plurality of micro concave holes; the periphery of each of the micro concave holes is provided with at least one recessed part having a molten surface; and the depth of each recessed part is smaller than that of each micro concave hole. The invention has the advantages that: the possibility for protrusions at the peripheries of the micro concave holes to fall off to fill the micro concave holes can be reduced or avoided, and the optical guide rotation performance of the optical microstructure is prevented from being degraded after the light guide plate is manufactured. In addition, after the light guide plate is arranged in a display, the joint tightness of the light guide plate and an optical film is improved, the excellent light-extraction efficiency is kept, the optical film is prevented from being broken, and the service life of the product is prolonged.

The invention discloses a dust-free multifunctional blackboard. The blackboard comprises a dustproof curtain cover, a blackboard body and a blackboard wiping device, wherein the blackboard is arrangedon the blackboard body; a blackboard functional frame is arranged on the periphery of the blackboard, and a curtain groove is formed in the outer side of a sliding groove; the inner side of the curtain groove is provided with a dustproof curtain cover through a sliding rod; gas nozzles are further symmetrically arranged on the adjacent inner side of the sliding groove at the top side of the blackboard functional frame; an air pump is further fixedly arranged on the upper side of the top end of the blackboard functional frame; and the air pump communicates with the gas nozzles, and a controller is further arranged on the side wall of the blackboard functional frame. The dust-free multifunctional blackboard is provided with wiping brushes which are arranged on the side wall of a wiping device box body in a two-row structure, the two rows of wiping brushes are designed in a crossed structure, so that the wiping brushes can be mutually crossed and wiped to enable the wiping path to extendto the surface of the whole blackboard, and the phenomenon that the wiping is not clean due to the fact that a gap is reserved is avoided.

The invention discloses a new energy automobile cleaning device, which comprises a cleaning frame body and a walking body. A flange is installed, and the flange is hingedly installed with a support sleeve. A spiral chamber with an opening facing downward is arranged in the support sleeve. A spiral column is installed in the spiral cavity, and the bottom of the spiral column has an extended tail. A supporting protrusion is slightly fixedly installed, and a receiving and embedding groove is provided in the front end surface of the cleaning rack body, and a control chamber that is expanded left and right is arranged in the inner wall of the cleaning rack on the rear side of the receiving and embedding groove. There is a control plate connected smoothly in the cavity; the invention has simple structure, convenient operation, convenient storage, convenient movement and transportation, and meanwhile, improves cleaning efficiency and effect.

The invention relates to a building steel formwork structure. The building steel formwork structure comprises a bottom plate, a formwork main body and a demolding device, wherein the demolding device comprises a mounting frame, a connecting plate, a lifting frame, a vibration cam, a transmission mechanism, a vibration plate and a vibration rod, and the formwork main body comprises a plurality of side plates, sealing pieces, rubber gaskets and connecting rods which are arranged from top to bottom. According to the building steel formwork structure, both the formwork main body and the bottom plate are of a detachable structure, the formwork main body can be separately conveyed in a transferring process, compared with an overall conveying mode, the transportation difficulty is obviously reduced, after concrete is formed, the side wall of the formwork main body is evenly knocked through the demolding device, and the knocking force tends to be large from small, so that the formwork main body or concrete is prevented from being damaged by sudden increase of the knocking force, and additionally, the condition that the separation speed of the formwork main body and the concrete cannot be increased due to small knocking force is avoided.

The invention discloses a cable trench convenient for cleaning and treating rain sewage, and belongs to the field of power equipment. The cable trench comprises a plurality of water collection modules, wherein the adjacent water collection modules are movably connected, the water collection modules on two adjacent sides communicate with each other, a partition plate is fixedly connected to one side of the top of an inner cavity of each water collection module, a water pump is fixedly connected to the bottom of each water collection module, and a drainage pipeline communicates with a water outlet in the top of the water pump. According to the cable trench convenient for cleaning and treating rain sewage, whether a drainage device is started or not can be controlled according to the water level in the cable trench and monitoring data within a set range around the cable trench, so that automatic drainage of accumulated water in the cable trench is realized, the service life of a cable inthe cable trench is not influenced by excessive accumulated water, and the cable trench can be applied to places where power or telecommunication cable facilities are laid and replaced under power plants, power substations and sidewalk.

The invention discloses a dragon fruit grafting method which comprises the following steps: I, selecting varieties of a rootstock and a scion; II, performing rootstock treatment, namely cutting a section of a plant twig as the rootstock, cutting off mesophyll tissue at the root part of the rootstock, exposing wooden white vascular bundles which are base parts of the rootstock, and cutting a stair-shaped grafting hole of which the cut surface is flat on the ridge of a rootstock stem; III, performing double-bud scion treatment, namely cutting a scion with double buds, wherein the cut part of thescion takes the shape of a Chinese word Ao and has a size corresponding to that of the grafting hole; IV, performing grafting treatment, namely aligning the cut part of the scion to the grafting holeof the rootstock, pressing the scion till the cut part is completely fitted to the grafting hole, and performing bundling and fixing, so as to obtain a grafting seedling; and V, performing grafting seedling culture, namely inserting the base part of the rootstock of the grafting seedling into soil, and performing culture, wherein it means grafting succeeds after the rootstock has roots and scionbuds germinate. The grafting method disclosed by the invention is high in survival rate, rapid in grafting speed and small in workload, the grafting time can be shortened, and the yield and the growthspeed of a scion dragon fruit variety can be effectively increased.

The invention provides a key without the requirement of hot melt, consisting of a key and a rear cover; the structure of the rear cover is matched with the key; five plastic rubber clamp columns are arranged below a key hole at the internal side of the rear cover; the key is provided with five special semiround structures which can be closely matched with the five clamp columns; the close matching strength needs no hot melt, thus reducing the working procedure during the assembly process and increasing the matching compactness; the key of the invention can be disassembled and maintained.

The invention relates to the technical field related to flange connection, and discloses a novel loose flange. The novel loose flange comprises a lower flange and an upper flange, wherein flanging flange plates are movably inserted into the hollow inner sides of the lower flange and the upper flange in a penetrating mode; the lower flange and the upper flange are connected with each other througha tightening mechanism; the plate surfaces of the two flanging flange plates are in contact with each other and are attached to each other; three corresponding annular embedding grooves are formed inthe attached surfaces of the two flanging flange plates; annular sealing rings are embedded into the two flanging flange plates through the annular embedding grooves; and hollow flow dividing plates are installed at the centers of the inner sides of the two flanging flange plates. According to the novel loose flange, the sealing performance of the flanging flange plates in use is effectively improved, on the premise that the structural matching sealing performance is not influenced, the friction force of the upper flange and the lower flange during movable rotation is effectively increased, the stability of matching installation between the structures is guaranteed, noise generated by flow dividing in the flanging flanges is effectively absorbed and reduced, and the noise of the flange connecting end is reduced.