30results about How to "Lighten the load" patented technology

This utility model discloses a modular connection structure and smart glasses, including an electronic module component one and an electronic module component two connected by a detachable structure. After the electronic module component one and the electronic module component two are connected in place, a closed electrical circuit is formed, which can realize the quick assembly and disassembly of different modules. Firstly, it can reduce the weight of the wearer when not in use, and secondly, it is convenient for later replacement and maintenance, while also being adaptable to a variety of usage scenarios.

This utility model belongs to the field of power transmission and distribution engineering technology, specifically disclosing an overhead insulated conductor with a reinforced tensile structure. It includes an aluminum conductor, an insulating separator sleeve fitted over the aluminum conductor, an insulating separator sleeve fixedly connected to the outside of the insulating separator sleeve, and a galvanized copper conductor on the outside of the insulating separator sleeve. It also includes reinforcing ribs, fixing blocks, and an outer protective layer for the conductor. The reinforcing ribs are used to improve the tensile strength of the conductor; the fixing blocks are used to fix the internal structure of the conductor. The beneficial effect of this utility model is that by using a non-metallic aramid fiber reinforcing layer and a glass fiber inner protective layer to jointly bear the load, the mechanical tensile function and electrical conduction function of the conductor are separated. The main tensile force is borne by extremely high-strength, extremely lightweight synthetic fibers, enabling the conductor to have a tensile strength and fatigue resistance far exceeding that of traditional steel-cored aluminum stranded wires of the same diameter, while significantly reducing the self-weight of the conductor and the load on the tower.

This invention discloses a method for preparing a novel ultra-high voltage high-performance composite insulating material, belonging to the field of composite insulating material preparation technology. The technical solution includes the following steps: S1, preparing a modified epoxy-silicone rubber composite resin matrix: 40-50 parts by weight of bisphenol A type epoxy resin (E-51) are placed in a reaction vessel, heated to 60-70℃, and continuously stirred at a stirring rate of 300-500 r / min. 10-15 parts by weight of terminal hydroxyl polysiloxane (molecular weight 5000-10000) are added, and the temperature is kept constant for 1.5-2 hours; subsequently, the system temperature is lowered to 40-50℃. The beneficial effects of this invention are: by setting up a resin matrix system of "terminated hydroxyl polysiloxane modified epoxy resin + nano-alumina / boron nitride composite reinforcement," the problem of imbalance between high voltage resistance and aging resistance in existing materials is solved. It exhibits significantly improved dielectric strength, greatly reduced dielectric loss, and excellent high and low temperature cycling performance, meeting the long-life operation requirements of ultra-high voltage equipment.

The application discloses a virtual hand training control device and a control method thereof, and relates to the field of virtual training applications. The virtual hand training control device comprises a glove unit, an arm sleeve unit, an operating mechanism and a controller, and the arm sleeve unit and the glove unit are separately arranged. The operating mechanism comprises a positioning unit, a displacement unit, a driving unit and a detection unit. The glove unit and the arm sleeve unit are separately arranged, so that the load caused by the device itself during use is reduced. The glove unit and the arm sleeve unit are connected through the operating mechanism, the displacement unit is driven by the different degrees of bending movements of the fingers of the human body, the detection unit detects the first displacement signal corresponding to the displacement unit, and the first displacement signal is fed back to the controller for integrated collection, so that resistance is provided for the bending of the fingers wearing the glove unit. The application can strengthen the use degree of the hand finger tendons, accelerate the recovery and construction of the body itself, and improve the use effect of the control training.

This utility model discloses a V-blade semi-circular horizontal turbine casing, belonging to the field of hydropower generation. It includes a semi-circular casing, a base tailrace tank, and a V-blade lever runner. The V-blade lever runner includes a runner disc with a lever effect and several V-shaped blades. Compared with the prior art, the shape of the semi-circular casing in this application is adapted to the runner disc for mounting nozzles, which can shorten the distance between the nozzles and the runner disc, reducing water flow loss at the nozzles. The V-shaped blades have "V"-shaped openings, which can both catch the water flow ejected from the nozzles, improving water flow utilization, and reduce airflow friction resistance generated during high-speed rotation using the "V"-shaped tips, thereby reducing energy loss and improving energy utilization. When the V-shaped blades rotate to the bottom of the runner disc, they can also unload water, reducing the load on the runner disc, giving the runner disc a lever effect, and improving the turbine's power generation efficiency.

The invention discloses a corner fitting connecting steel structure for an automobile production line, and relates to the technical field of automobile production, the corner fitting connecting steel structure comprises a mounting plate, the lower side of the mounting plate is fixedly connected with a supporting pipe, the inner walls of two adjacent sleeves are slidably connected with the same transverse pipe, and the inner wall of the transverse pipe is fixedly connected with a first protective shell; the inner bottom wall of the first protective shell and the inner top wall of the second protective shell are fixedly connected with sealing mechanisms, the lower side of the mounting plate is fixedly connected with a connecting corner fitting, the right side of the connecting corner fitting is provided with a first locking hole in a penetrating mode, and the inner wall of the first locking hole is slidably connected with a locking mechanism. By arranging the locking mechanism, the hexagonal block can only rotate clockwise under vibration generated by equipment operation, so that the clamping rod more tightly abuts against the inner wall of the supporting pipe, unstable installation of the connecting corner fitting can be avoided, it is ensured that the capacity of the supporting pipe for bearing equipment pressure on the installation plate cannot be reduced, and adverse effects caused by equipment vibration are reduced.

This invention provides a worktable flatness adjustment device for wafer grinding equipment, relating to the technical field of wafer processing equipment. It includes a main leveling base, an upper transfer tray, a lower support slide, and a lower inclined wedge bracket. The upper transfer tray is positioned above the main leveling base, and the lower support slide is positioned at the top of the main leveling base. The lower inclined wedge bracket is positioned at the bottom of the upper transfer tray. A lower connecting frame is rotatably connected to the top of the lower support slide, and a middle connecting frame is rotatably connected to the upper part of the lower connecting frame. A lower threaded tube is rotatably connected to the upper part of the middle connecting frame, and an upper threaded post is threadedly connected to the upper end of the lower threaded tube. An upper inclined wedge bracket is slidably connected to the upper part of the lower inclined wedge bracket. By extending and retracting the lower threaded tube and the upper threaded post to coarsely adjust the upper transfer tray, and by finely adjusting the lower and upper inclined wedge brackets, a balance between adjustment speed and adjustment accuracy is achieved, solving the problem that a single-threaded structure cannot simultaneously achieve both adjustment speed and adjustment accuracy.

The embodiment of the application discloses a low-profile small-size wideband omnidirectional vertical polarization slot antenna, which comprises a dielectric plate arranged on the top of a metal radiator and in contact with the metal radiator, the metal radiator is in contact with the metal layer of the dielectric plate, the side wall of the metal radiator is provided with a slot, and an omnidirectional vertical polarization radiation mode is formed through equivalent magnetic current radiation of the slot; the metal feeding probe comprises an inner conductor and an outer conductor in a coaxial structure; a circular truncated cone-shaped metal cavity is formed in the metal shell, the inner conductor is connected with the bottom of the metal shell, the antenna radiator is arranged in the metal cavity, the outer conductor penetrates through the metal radiator, and the top end is in abutting contact with the metal layer of the dielectric plate and is fixedly connected through the assembly surface of the dielectric plate and the circular truncated cone-shaped shell to form a radome. The technical scheme provided by the embodiment of the application solves the problem that the existing omnidirectional antenna form is relatively complex in structure and it is difficult to realize more functions in one structure.

The utility model relates to building template technical field, concretely is a kind of building template anchor hole inner pore rubber stick bracket, including base, the top of base is fixedly connected with motor base, the top of motor base is fixedly connected with motor, the output of motor is fixedly connected with limit rod, the top of base is fixedly connected with support plate, the side of support plate is slidably connected with plug-in rod, the surface of plug-in rod is fixedly connected with stop block, the side of stop block is fixedly connected with first spring, the side of support plate is fixedly connected with one end of first spring, the surface of plug-in rod is rotatably connected with winding drum.Advantage lies in: user can replace winding drum, and the cooperation of plug-in rod and support plate makes motor reduce bearing capacity, it is also very convenient when replacing and installing winding drum, time-saving and labor-saving, the equipment starts electric push rod and pushes the even-speed movement of positioner component, so that rubber stick can be evenly wound on the surface of winding drum, it is very practical.

This utility model discloses a pier-crossing moving device, belonging to the field of bridge construction technology. The pier-crossing moving device is located on a bridge and includes a traveling component, a lifting component, a working component, and a supporting component. The traveling component is suspended above the bridge deck and rolls in contact with the supporting guardrail on the bridge. The lifting component is installed on the traveling component and is located on one side of the supporting guardrail. The traveling component is connected to one end of the supporting component, which is located on the other side of the supporting guardrail. There is a gap between the supporting component and the supporting guardrail. The other end of the supporting component is movably connected to one side of the working component, allowing the working component to rotate relative to the supporting component. A traction rope in the lifting component is connected to the other side of the working component, which is located below the bridge. The supporting guardrail provides a gravity balance support point between the working component and the lifting component, ensuring the stability of the pier-crossing moving device during construction and reducing the impact of lateral forces on the supporting guardrail.

The utility model discloses an indoor design decorative line relates to indoor decoration technical field, and this decorative line includes the hard shell of built -in cavity, and the shell is filled with EPS foam to reduce the overall weight, and the outside of EPS foam is equipped with mesh cloth and enhances structural stability, the hard shell upper end opens multiple groups of connecting grooves, and the cooperation of glue promotes and the connecting firmness of wall body, the both sides of shell install the decorative board, and the inside of hard shell is equipped with the installation groove for installing the light bar to enrich the function, and the shell is equipped with the fixing device, and the device contains the connecting plate of recess, screw hole, fixed bolt and decorative board one side, and the connecting plate extends to the recess, and through fixed bolt passes through screw hole and connecting plate through -hole realizes the firm connection of decorative board, shell and wall body. Besides, the hard shell is L type, and adapts wall face corner etc. common decoration position. The utility model is light in weight, and the installation is convenient and has various functions, can satisfy modern indoor decoration demand.

The application belongs to the technical field of laser measurement, in particular to a injection mold thread size measuring device, which comprises a guide component, a thread rod, a scanning component, a fixing component and a calibration component, the fixing component is arranged on the left side of the guide component, the calibration component is arranged on the right side of the guide component, and the scanning component is symmetrically arranged on both sides of the guide component. The device can scan the outer surface thread of the thread rod by the combined laser measuring device, so as to determine whether the thread size of the thread rod is normal according to the shape and depth of the thread groove. Since the combined laser measuring device can rotate around the outer surface of the thread rod and slide from left to right under the traction of the long box, the outer surface of the thread rod is completely scanned, ensuring that there is no dead angle, thereby effectively adapting to the thread groove of complex curved surface and small structure, and the measuring efficiency is high, the operation is simple, and the detection efficiency is effectively improved.

The present application belongs to the technical field of temperature control, and particularly relates to a temperature control liquid for coal-based Fischer-Tropsch synthesis hydrocarbon as well as a preparation method and application thereof. The temperature control liquid mainly comprises coal-based Fischer-Tropsch synthesis hydrocarbon, or the temperature control liquid mainly comprises coal-based Fischer-Tropsch synthesis hydrocarbon and liquid polyolefin. The distillation range of the coal-based Fischer-Tropsch synthesis hydrocarbon is less than or equal to 350 DEG C. The main component of the coal-based Fischer-Tropsch synthesis hydrocarbon is isomeric alkanes and normal alkanes with carbon number of 12-24, wherein the isomeric alkanes account for less than 90% of the total mass, and the normal alkanes account for more than 10% of the total mass. The kinematic viscosity of the coal-based Fischer-Tropsch synthesis hydrocarbon is less than or equal to 2.5 mm 2 / s at 100 DEG C, and 2.0-6.0 mm 2 / s at 40 DEG C. The kinematic viscosity of the liquid polyolefin is less than or equal to 8.0 mm 2 / s at 100 DEG C, and 2.0-20.0 mm 2 / s at 40 DEG C. The temperature control liquid has the characteristics of low density, low electrical conductivity, low kinematic viscosity and high heat conduction efficiency.

The application relates to a kind of exoskeleton auxiliary devices for relieving muscle fatigue injury, and relate to the technical field of exoskeleton equipment, including upper limb exoskeleton assembly and lower limb exoskeleton assembly, the upper limb exoskeleton assembly and lower limb exoskeleton assembly are all unpowered power assisting structure, and modular adjustable design is adopted;The upper limb exoskeleton assembly includes shoulder joint energy storage assembly, screw adjusting mechanism and shoulder joint part, and the lower limb exoskeleton assembly includes sequentially connected lower limb thigh assembly, lower limb calf assembly, ankle joint part and foot bottom support part, the upper limb exoskeleton assisting range in the application is limited to the included angle of 45°~90° with the trunk, matches the core action interval of operation, the shoulder joint is designed through three degrees of freedom to match the human motion characteristics, the lower limb takes hip, knee and ankle as the core, releases elastic potential energy through energy storage component, specifically reduces the limb load, effectively reduces the risk of muscle strain caused by long time operation.

The utility model discloses waterproof woven cloth production equipment with wear resistance, which relates to the technical field of waterproof woven cloth production, and comprises an equipment body, a sealing door fixedly connected onto the equipment body, a second transmission roller connected onto the equipment body in a sliding manner, and a transmission component arranged in the equipment body, the transmission assembly comprises a sliding block slidably connected to the inner wall of the equipment body, a fourth rotating shaft is rotatably connected to the sliding block, a first transmission rod is fixedly connected to the sliding block, a transmission piece is slidably connected to the first transmission rod, a torsion spring is rotatably connected to the transmission piece, and a lifting rod pushes a first fixing block to support the first rotating shaft. The second damping provides buffering force in the lifting process, when the gravity of a cloth roll changes, the damping is compressed or stretched to adjust the lifting height in a self-adaptive mode, the bearing load of a transmission roller shaft head is reduced, and the problem that in the prior art, the connecting position of a transmission roller and equipment is prone to cracking is solved.

The utility model relates to energy storage converter technical field, concretely relates to an energy storage converter with filter dustproof structure, including converter body, the frame board of converter body box door place installation, the connecting frame with the blocking net of frame board opening clamping is used for intercepting large foreign matters, the electrostatic fin of frame board inside extension reaches the filter box and is connected electrostatic generator through flexible wire, and electrostatic generator utilizes converter body electric power to produce electrostatic field to adsorb the dust in airflow, the top of filter box through frame board is equipped with the slot, and the top end of the pull groove of inserted outer protective frame is configured, and the residual microparticle is caught in the inner fold filter core of outer protective frame, the structure makes airflow to be filtered successively, electrostatic fin initiative adsorption, fold filter core fine filter three -level processing, and electrostatic adsorption reduces filter core dust load greatly, avoids its rapid blockage, and the pull groove and the slot cooperate and realize filter core vertical pull -out type replacement, and simplify maintenance process, and the system solves the high frequency maintenance problem of traditional single -stage filter screen while guaranteeing the filtering precision.

The application provides a lifting device and an air conditioning unit, the lifting device is used for driving a fan assembly of the air conditioning unit to perform lifting movement, and the lifting device comprises a fixed plate used for bearing the fan assembly; a lifting assembly rotatably connected with the fixed plate, a bottom end of the lifting assembly used for contacting a supporting base surface; and a transmission assembly connected with the lifting assembly to drive the lifting assembly to rotate relative to the fixed plate, so that the bottom end of the lifting assembly moves relative to the supporting base surface, and the fixed plate is lifted relative to the supporting base surface to drive the fan assembly to perform lifting movement. The fan assembly is lifted by the lifting device and supported after descending, so that the problems of difficult lifting and difficult bottom supporting of the fan assembly in the air conditioning unit in the prior art are solved.

This utility model relates to the field of lower limb assistive device technology, and more particularly to a power joint mechanism for a lower limb assistive device. The technical solution includes: a flexible joint assembly, which comprises a joint disc frame, a flexible disc disposed within the joint disc frame, a spiral spring disposed within the flexible disc, and two sets of limiting arc grooves formed on the flexible disc. Each set of limiting arc grooves contains a positioning pin. Leg components are disposed at the lower end of the joint disc frame and the upper end of the flexible disc. Each leg component includes a fitting plate, with a strap and an adjustment strap respectively disposed on both sides of the fitting plate, and a positioning post disposed on the strap. Compared to traditional complex mechanical structures, this utility model, through the coordinated arrangement of the flexible joint assembly and the two sets of leg components, results in a more compact overall structure, smaller size, lighter weight, and easier wear and use, as well as easier storage and portability.

This utility model discloses a novel battery pack tray packaging structure, including a tray base and multiple split-type packaging pads. Multiple battery pack trays are stacked on the tray base, with the same number of split-type packaging pads between each layer of battery pack trays, and their vertical positions corresponding. Each split-type packaging pad includes a movable block and a support base. The movable block is movably connected to the support base and can slide freely up and down relative to the support base. The movable block is placed between the upper and lower layers of battery pack trays, and the support base is located at the side edge of the battery pack tray and serves to limit the side position of the battery pack tray. The support bases between two adjacent split-type packaging pads are stacked together and aligned vertically. This novel battery pack tray packaging structure effectively avoids damage to the pads, indirectly improving the cycle life of the pads and the stability of the packaging, greatly reducing damage to the battery pack trays during transportation, and lowering packaging costs.

This invention provides a fan device and an air conditioning system. The fan device includes: a hoisting assembly with a movable opening; a fan assembly that can be mounted through the movable opening; and a lifting mechanism connected to the hoisting assembly. The lifting mechanism includes a lifting component located below the hoisting assembly and supporting the fan assembly. The lifting component is vertically movable so that at least a portion of the fan assembly, driven by the lifting component, passes through the movable opening and is positioned outside the hoisting assembly and supported on a fixed foundation. This invention solves the problem in the prior art where the weight of the suspended fan assembly is borne entirely by the base of the cabinet, resulting in excessive load on the base and hindering reliable operation of the fan assembly.

The application provides a lifting device and an air conditioning unit, the lifting device is used for lifting operation of a fan assembly, and the lifting device comprises a lifting frame, a lifting assembly and a supporting assembly, the lifting frame has a moving opening for the fan assembly to pass through; the lifting assembly is connected with the fan assembly to lift the fan assembly on the lifting frame, the lifting assembly is movably arranged relative to the fan assembly to be movably arranged in a vertical direction relative to a supporting base surface through relative movement between the fan assembly and the lifting assembly; the supporting assembly is used for being installed at a bottom end of the fan assembly to support the fan assembly through contact with the supporting base surface when the fan assembly passes through the moving opening and drops to a predetermined position, so that the problem of difficult lifting and difficult bottom support of the fan assembly in the air conditioning unit in the prior art is solved.

The utility model discloses a drawing plate suitable for various vehicle types, which relates to the technical field of conveying, logistics transportation and loading, and comprises a tongue plate, a rack, an upper roller and a roller component II, the tongue plate comprises an upper plate with an angle, a vertical plate, a lower plate, a vertical plate, a roller assembly I, a gasket, a mandrel I and a cotter pin; wherein the side face of the upper plate is fixedly connected with the vertical faces of the vertical plates, the upper face of the lower plate is fixedly connected with the lower face of the upper plate, the multiple vertical plates are distributed on the lower face of the upper plate, the first roller assembly is connected with the first mandrel, the first roller and the second roller can rotate along the first mandrel and the second mandrel respectively, and rubber-coated roller design is adopted for the first roller and the second roller. The bearing of the pulling plate on the carriage plate is reduced, on one hand, the rigidity of the whole pulling plate can be improved, on the other hand, the obstacle crossing capacity of the whole pulling plate can be improved, and the pressure on the carriage plate is also reduced.

This application relates to the technical field of high-formwork deformation monitoring, and in particular to a method, system, and storage medium for monitoring high-formwork deformation. The method includes the following steps: acquiring high-formwork data to be monitored and poured concrete data; acquiring a first modeling model based on the high-formwork data; acquiring a plurality of gravity monitoring rod positions based on the first modeling model; acquiring a second modeling model based on the poured concrete data; acquiring a plurality of stress monitoring rod positions based on the second modeling model; and acquiring a plurality of actual monitoring rod positions based on the gravity and stress monitoring rod positions. This application has the advantage of being able to obtain actual monitoring rod positions through modeling, and then improving the overall detection accuracy of high-formwork by monitoring these actual monitoring rod positions.

This utility model discloses a height-adjustable base suitable for intelligent robots, including a base with symmetrically fixed slide rails on the top. Sliding blocks are slidably fitted onto the surfaces of the slide rails. A dual-head motor is fixedly installed in the middle of the base, and a lead screw is fixedly connected to the output end of the dual-head motor. The lead screw is threaded onto the sliding block, and a rotating rod is rotatably fitted onto the top of the sliding block. One end of the rotating rod is provided with an installation component. This utility model relates to the field of robot engineering technology. This height-adjustable base suitable for intelligent robots solves the problems of not being able to connect to the bottom of robots of different shapes, making overall assembly and disassembly inconvenient and labor-intensive. Furthermore, traditional lead screws directly drive the lifting platform, which makes the platform prone to tilting due to load shifting during lifting, and long-term direct-drive load-bearing easily leads to wear of the lead screw threads.

The utility model relates to the technical field of granulating cylinder cleaning, specifically relates to a granulating cylinder cleaning device, the granulating cylinder cleaning device includes: condensate tank, the cleaning pipeline one end with condensate tank intercommunication, the other end with granulating cylinder input pipeline intercommunication of the cleaning pipeline, the granulating cylinder input pipeline with the granulating cylinder's granulating shower head intercommunication, switching assembly, the granulating cylinder input pipeline passes through switching assembly with cleaning pipeline or material pipeline intercommunication. Utilize condensate in condensate tank as cleaning medium, through cleaning pipeline send condensate into the granulating shower head of granulating cylinder, to clean, through setting switching assembly, can switch between cleaning mode and material production mode, need not to dismantle or replace pipeline, greatly improved the convenience and efficiency of cleaning.

The utility model discloses a wearable man-machine interaction glove, which belongs to the technical field of man-machine interaction and comprises a glove body, a silica gel pad is arranged at the hand back of the glove body, silica gel columns are uniformly arranged at the top of the silica gel pad, and a central control unit is arranged between the tops of the silica gel columns. Through the structural design of the silica gel pad, the silica gel column and the like, the weight of the central control unit can be effectively dispersed, the elastic band and the wrist binding band are used, the weight of the module can be transferred to the wrist joint through the elastic band, the bearing capacity of the hand back is reduced, the hand back is prevented from intensively pressing muscle tendon and blood vessels of the hand back, and the use safety is improved. In addition, a gap is reserved between the central control unit and the back of the hand, dynamic adjustment of gas circulation can be achieved, sweat volatilization is promoted, the problem of stuffiness caused by tight attachment of the modules and the back of the hand in a traditional glove is solved, the hand is kept dry and comfortable, and using comfort and durability are improved.

The present application relates to a kind of finished grain stacking system, including stacking group, each stacking group includes at least two stacking series, each stacking series includes at least two stacking components, stacking component includes the stacking cage with the cage fork hole being provided at bottom, stacking cage includes cage bottom plate and the three lateral cage side limit being arranged on the upper end of cage bottom plate, define the two stacking cages adjacent in upper and lower direction in the same stacking component as upper side stacking cage and lower side stacking cage, the bottom four corners of upper side stacking cage are connected with the top four corners of lower side stacking cage by the positioning structure of concave-convex positioning cooperation along the upper and lower direction, stacking component further includes the tray for being placed on the upper side of cage bottom plate, tray bottom is provided with tray fork hole, and finished bagged grain is stacked between the upper side of tray and each cage side limit, the present application solves the technical problem that the lowermost packaging bag is easily damaged under greater pressure in the prior art, and the stacking structure is unstable and easily inclined to collapse.

The present application belongs to the field of pile foundation construction equipment, and particularly discloses a self-recovery grab bucket with toughness, a control method and a micro pile grab bucket hole forming equipment. The grab bucket comprises a bucket segment with grab bucket teeth; the grab bucket teeth are arranged at the lower end of the bucket segment through a tooth replacement mechanism; the tooth replacement mechanism comprises a tooth cartridge, the inner cavity of the tooth cartridge is a tooth accommodating cavity, and the tooth accommodating cavity is provided with a tooth locking assembly and a tooth replacement driving part. In the case of broken or excessively worn grab bucket teeth, the tooth replacement driving part drives the grab bucket teeth in transmission cooperation to move towards the tooth replacement opening and extrude the first grab bucket tooth out of the tooth accommodating cavity, and the second grab bucket tooth moves to the position where the first limiting structure and the second limiting structure of the tooth locking assembly are matched together, so as to realize the function of automatically replacing the grab bucket teeth, ensure that the grab bucket can quickly recover to the normal state for continuous drilling, and thus the manual disassembly and replacement of the grab bucket teeth are not needed, so that the artificial labor intensity is not increased, and the construction efficiency is ensured.

The hinge device comprises a first rotating assembly and a second rotating assembly, the first rotating assembly comprises a first rotating arm, a first rotating piece and a second rotating piece, the first rotating arm comprises a first end face and a second end face which are opposite, and the first end face is welded to the peripheral face of the first rotating piece; the second end surface is welded with the peripheral surface of the second rotating part; the second rotating assembly comprises a second rotating arm, a third rotating part and a fourth rotating part, the first rotating arm is rotationally connected with the second rotating arm, the second rotating arm comprises a third end face and a fourth end face which are opposite, the third end face is welded to the peripheral face of the third rotating part, and the fourth end face is welded to the peripheral face of the fourth rotating part. In this way, the connecting strength between the first rotating arm and the first rotating piece and the second rotating piece and the connecting strength between the second rotating arm and the third rotating piece and the fourth rotating piece are high, so that the hinge device can be suitable for a high-load-bearing environment, and abnormal sound cannot be generated. The invention further provides a manufacturing method of the hinge device.