203results about How to "Rigid enough" patented technology

The utility model belongs to the field of building structures, and provides a rigid connection node of a square steel pipe column and a reinforced concrete column, which comprises an embedded steel plate, cross-shaped steel and a plurality of anchor bars, the cross-shaped steel and the anchor bars are both pre-buried in a reinforced concrete column, the pre-buried steel plate is fixedly arranged on the top of the reinforced concrete column, the cross-shaped steel and the anchor bars are both located below the pre-buried steel plate, and the top ends of the cross-shaped steel and the top ends of the anchor bars are both fixed to the pre-buried steel plate. And the embedded steel plate is fixed with the square steel pipe column. The rigid connection node can effectively solve the problem that when the size of the square steel pipe column on the upper portion is close to the size of the reinforced concrete column on the lower portion, a traditional embedded type or outer wrapping type method is not suitable, rigid connection between the square steel pipe column and the reinforced concrete column can be achieved, column bottom bending moment, axial force and shearing force of the square steel pipe column can be effectively transmitted, stress is reasonable, and the service life of the square steel pipe column is prolonged. Installation is convenient, and enough rigidity is achieved.

The utility model relates to a light-weight aluminum support with a water tank for a fixed intermediate transmission shaft assembly of a four-wheel drive vehicle, and belongs to the technical field of automobile transmission shafts. Comprising a middle transmission shaft assembly, a middle supporting metal plate support, an aluminum support and a water tank structure, the middle transmission shaft assembly is connected with the middle supporting metal plate support, the water tank structure is arranged at the bottom of the aluminum support, the middle supporting metal plate support is installed above the water tank structure of the aluminum support, and a plurality of through holes are formed in the water tank structure. The intermediate transmission shaft assembly structure is used for filtering sand and soil generated in the running process of a vehicle, so that deformation of the device caused by silt blockage and accumulation is avoided, and the service life of the intermediate transmission shaft assembly structure is prolonged.

The invention provides a reinforcing device for a fabricated steel structure column and a construction method thereof.The reinforcing device comprises a bottom unit detachably connected with the ground through a connecting piece, the bottom face of the steel structure column is pressed on the bottom unit, and the bottom unit is provided with a clamping assembly used for being supported on the inner wall of the steel structure column; reinforcing units used for being clamped to the outer wall of the steel structure column are arranged on the two sides of the clamping assembly correspondingly, the height of each reinforcing unit is adjusted through a vertical driving assembly, and the distance between the two reinforcing units is adjusted through a transverse driving assembly. The bottom face of the steel structure column is completely attached to the bottom unit, the contact area of the bottom face of the steel structure column and the ground is indirectly increased, and therefore the overall stability of the steel structure column during installation and use is improved. The reinforcing positions of the reinforcing units and the steel structure columns are adjusted through the vertical driving assemblies, reinforcing of the reinforcing units and the steel structure columns with different inner diameters can be adjusted through the transverse driving assemblies, the application range is wide, and operation is accurate.

The invention discloses an impact type rotating wheel hollow water bucket structure and a manufacturing method thereof, and relates to the technical field of hydroelectric power generation, in particular to the manufacturing method of the impact type rotating wheel hollow water bucket structure, which comprises the following steps: S1, preparing an impact type rotating wheel hub and a water bucket root solid area through forging, milling, polishing and other process means; s2, calculating a water bucket hollow part model through the working stress of the rotating wheel; and S3, the prepared rotating wheel hub is clamped to a positioner, and according to the model calculated in the above steps, the additive manufacturing of the rotating wheel hollow water bucket is achieved by continuously and cooperatively adjusting the spatial position of the rotating wheel and the posture of a welding gun. The invention has the advantages of reducing the weight, improving the stability, reducing the inertia, prolonging the service life, saving the cost, promoting the sustainable development, optimizing the structural design, improving the performance, improving the efficiency, reducing the energy consumption, being convenient to manufacture and maintain and enhancing the adaptability.

The invention relates to the technical field of sports protection, in particular to an intelligent protection system for lower limb joints in sports. Comprising a mounting bandage, a wearing support plate, a controller, an attitude sensor and a joint angle sensor, a driving device is arranged on the wearable supporting plate; the controller is arranged on the wearable supporting plate and comprises a data calculation module used for calculating and analyzing data of the attitude sensor and the joint angle sensor and recognizing abnormal signs of a wearer; the emergency warning module is used for sending warning information when abnormal signs are recognized; the alarm module is used for carrying out alarm processing when the warning information is sent out and measures cannot be taken within a preset time; the motion recognition module is used for recognizing the motion type of the wearer through the attitude sensor, generating a wearable supporting plate rigidity control signal according to the joint risk of the motion type, and adjusting the rigidity of the wearable supporting plate through the driving device. According to the technical scheme, the injury risk of lower limb joints in movement can be effectively reduced.

The utility model belongs to the technical field of safety protection and isolation, and particularly relates to an oil and gas storage and transportation engineering safety protection and control device which comprises a base, the base is fixedly connected with a main rod, a through groove is formed in the surface of the main rod, a transverse rod is slidably connected in the through groove, and a fixing column is movably connected with a pressing fastening device. The pressing fastening device comprises an inclined block. According to the safety protection and control device for the oil and gas storage and transportation project, through the arranged extension reinforcing assembly, a connecting rod drives an inserting column to ascend, the inserting column moves and drives a connecting plate to move upwards at the same time, and in the upward moving process of the connecting plate, the connecting plate moves forwards along a sliding groove and drives an extension plate shrunk in a sliding plate to extend outwards; the extension plate has enough strength and rigidity to bear the soil pressure and the weight of the device, the friction force between the device and the soil is increased, displacement is prevented, the limiting device is inserted into the soil and cannot be reset, and the installation stability can be improved.

The invention discloses a rocket body structure capable of achieving long-term on-orbit power supply. The rocket body structure comprises a main force bearing structure, a separation device, a connector and a solar cell substrate. Wherein the separating device and the connecting joint are respectively arranged on the main force bearing structure; the main force bearing structure is connected with the solar cell substrate capable of supplying power through the connector so that the function that the solar cell substrate supplies power to the rocket body structure can be achieved. The main force bearing structure is connected with the adjacent structure through the separation device so as to achieve the structure separation function. The problems that the residual value of the tail sub-stage of an existing carrier rocket is difficult to utilize, and track resources are occupied are solved.

The utility model provides a wireless snap ring type strain torque sensor and a cutter handle comprising the same, relates to the technical field of machine tools, and solves the technical problem that the original structure of a shaft to be tested needs to be cut off or transformed when a torque sensor tests torque. The torque sensor comprises a first elastomer end ring which is of an annular structure; the second elastomer end ring is of an arc-shaped structure; the two elastic body connecting columns are symmetrically arranged, and the two ends of each elastic body connecting column are connected with the first elastic body end ring and the second elastic body end ring respectively, so that a torque sensor with I-shaped front view projection is formed; the strain gauge groups are symmetrically mounted on the two elastomer connecting columns; the cutter handle comprises a cutter handle body and a wireless clamping ring type strain type torque sensor, and the wireless clamping ring type strain type torque sensor is arranged on the cutter handle body in a sleeving mode in an interference fit mode. The device is used for real-time monitoring of machining conditions of a machine tool, real-time monitoring of output torque of an electric spindle, fault diagnosis, tool wear monitoring and the like.

The invention relates to a satellite and rocket separation unlocking actuator. Comprising a shell and a tail cover, a containing cavity is formed in the shell, an actuating pin penetrating hole and a limiting mounting groove are formed in the shell, and a mounting hole is formed in the bottom of the limiting mounting groove; the limiting installation groove is provided with a limiting installation plate, a circuit board and a supporting sleeve, a power connector is arranged in the supporting sleeve, a guide column is arranged on the limiting installation plate, an actuating pin is installed on the actuating block, the actuating block is in sliding connection with the guide column, and a memory alloy wire is hung on the actuating block. The two ends of each memory alloy wire extend outwards to sequentially penetrate through the limiting mounting plate and the circuit board to extend into the supporting sleeve; an elastic piece is arranged between the limiting mounting plate and the actuating block and sleeved with a memory alloy wire, and the two ends of the elastic piece abut against the limiting mounting plate and the actuating block respectively; through the structural design of the satellite-rocket separation and unlocking actuator, the technical problems that existing satellite-rocket separation and unlocking action equipment is complex in structure, extremely low in part machining efficiency, extremely high in cost and incapable of guaranteeing the yield are solved.

The utility model discloses a boiler flue gas duct for fine construction, which belongs to the field of boiler flue gas ducts and comprises a flue gas duct wall, a support plate, support legs, a clamping plate, an angle steel belt, a thermal insulation layer, a reinforcing mesh and a protective layer. The specification and the size of the flue wall are determined according to data statistics, uniform blanking, prefabrication and splicing part division are carried out, finally hoisting and assembling are carried out on site, after the flue wall is assembled and spliced, the heat preservation layer is installed on the flue wall, and the heat preservation layer carries out heat preservation and heat insulation on the flue wall. The reinforcing mesh on the inner side of the heat preservation layer can increase the firmness of the heat preservation layer plate and prevent the heat preservation layer from cracking, the protection layer is fixed to the clamping plate after the heat preservation layer and the clamping plate are installed, the functions of rain prevention, wind shielding and the like are achieved for the clamping plate and the heat preservation layer, fine construction is conducted on installation of the smoke and air duct, and the smoke and air duct has enough strength, rigidity and stability. Strong vibration is avoided, the construction quality is improved, and the construction efficiency is guaranteed.

The invention belongs to the technical field of plunger pumps, and provides a split block detachable pump head with butt joint type plunger sections. A split block detachable pump head with butt joint type plunger sections comprises a pump head body and a pump body, plunger rods are arranged in the pump head body and the pump body, each plunger rod comprises a first plunger section and a second plunger section which are connected, the first plunger sections and the second plunger sections are both located in the pump body, and nesting parts are arranged at the joints of the first plunger sections and the second plunger sections. The nesting part is provided with a radial connecting hole, and a first fastener is arranged in the radial connecting hole. By adopting the arrangement, the interior and the exterior of the plunger pump can be fully disinfected and washed; the nested parts are axially staggered, so that the bearing capacity of the axial load and the radial load of the first plunger section and the second plunger section can be improved, and the overall rigidity of the plunger rod is improved; the relative positions of the second plunger section and the first plunger section are positioned through the radial connecting holes, and it can be guaranteed that the volume efficiency of the plunger pump is kept stable.

The utility model discloses a punching and positioning device for plate machining. The punching and positioning device comprises a rack, a positioning assembly and a clamping assembly. A machining area is arranged on the machine frame, and the clamping assembly is arranged on the side portion of the machining area and used for limiting plates placed in the machining area. The positioning assembly is installed in the machining area, the positioning assembly forms a positioning area with the adjustable position, and the positioning area is suitable for corresponding to an area, to be drilled, of a plate. Compared with an existing plate machining and punching device, the plate machining and punching device has the beneficial effects that the positioning assembly is installed in the machining area, so that the drilling area can be supported through the positioning area formed by the positioning assembly during plate machining, and it is ensured that the drilling area of a plate has enough rigidity; and the finished product quality after material processing is ensured.

The utility model provides a railway vehicle roof profile self-adaptive adjusting device, a roof comprises a roof profile, the self-adaptive adjusting device comprises a self-adaptive module, a pressure applying module and an adjusting module, the self-adaptive module is used for rigidly restraining the roof profile, the self-adaptive module comprises a span beam and a self-adaptive pressing block, and the span beam is connected with the self-adaptive pressing block. The span beam is connected to the top of the roof panel profile in a bridging mode, and the self-adaptive pressing block is at least arranged at the position, corresponding to the flanging of the roof panel profile, of the span beam. The fixing angle and the fixing position of the self-adaptive pressing block and the span beam and the position of the pressing face of the self-adaptive pressing block can be adjusted in a self-adaptive mode according to the structural characteristics of the turned-over edge of the car roof profile. One end of the pressure applying module abuts against the self-adaption module, the other end of the pressure applying module is connected with the adjusting module, and pressing force is applied to the self-adaption module; and the adjusting module is connected with the pressure applying module and is used for adjusting the position of the pressure applying module.

The invention relates to the field of water pumps, in particular to a valve element structure and a pump body thereof, the valve element structure comprises a main body framework and a sealing ring arranged on the main body framework in a sleeving mode, a circle of assembling groove position matched with the sealing ring is formed in the outer side of the main body framework, and the sealing ring is arranged on the corresponding assembling groove position in a sleeving mode; the hardness of the main body framework is larger than that of the sealing ring. The main framework serves as a main supporting structure of the valve element, the hardness of the main framework is larger than that of a sealing ring, and it is guaranteed that the valve element has enough rigidity and stability when bearing fluid pressure or mechanical stress. The main body framework is prevented from deforming under high pressure or high back pressure, so that the integrity and the sealing performance of the main body framework structure are kept. The sealing ring is arranged on the assembling groove position of the main body framework in a sleeving mode, and the good sealing effect is achieved through close fit.

The utility model discloses a mattress equipment air suction hopper device which comprises an air suction bin, two air suction supports are installed in the air suction bin, one end of each air suction support penetrates out of the air suction bin, the air suction supports suck air in the air suction bin, the air suction bin is of an isosceles trapezoid structure, and the upper end of the air suction bin is longer than the lower end of the air suction bin. Screen holes are formed in the upper end face of the air suction bin, driven wheel assemblies are installed on the two sides of the air suction bin, and a traction wheel assembly is installed in the center of the lower portion of the air suction bin. Air suction and fixing are combined into a whole, compared with a common air suction hopper, the length of the device is shortened, the device can complete the material adsorption function in a short stroke, material conveying can be conducted in a limited space, cost is greatly saved, meanwhile, the support transversely penetrates through the air suction bin to provide enough rigidity, and the material conveying efficiency is improved. And the problem of material deviation caused by shaking of the device is reduced.

The three-way vibration isolator comprises an upper foot margin piece, a lower foot margin piece and spokes, and the upper foot margin piece serves as an upper supporting structure of the three-way vibration isolator and is used for being connected with a machine case; the lower foot margin piece serves as a lower supporting structure of the three-way vibration isolator and is used for supporting a fan; the spokes are connected with the upper foot margin piece and the lower foot margin piece to form a main body structure of the three-way vibration isolator; the upper foot margin piece and the lower foot margin piece are parallel, an upper foot margin piece hole is formed in the piece face of the upper foot margin piece and connected with a machine box through a bolt, a lower foot margin piece hole is formed in the piece face of the lower foot margin piece and connected with a fan through a bolt, and the upper foot margin piece and the lower foot margin piece are connected through a bolt. The upper foot margin piece, the lower foot margin piece and the spokes are each of a hollow structure, each hollow structure comprises an opening, the spokes are elastic, the upper foot margin piece and the lower foot margin piece are each of a structure with a certain thickness and rigidity, and the device solves the current problems of high cost and poor vibration isolation performance.

The utility model discloses an offshore triangular flow blocking net cage which comprises a first buoyancy pipe, a second buoyancy pipe and a third buoyancy pipe, the first buoyancy pipe, the second buoyancy pipe and the third buoyancy pipe are connected end to end to form a triangular structure, and a reinforcing pipe is arranged in an area defined by the first buoyancy pipe, the second buoyancy pipe and the third buoyancy pipe. The first buoyancy pipe, the second buoyancy pipe and the third buoyancy pipe are connected through reinforcing pipes. The triangular structure formed by combining the first buoyancy pipe, the second buoyancy pipe and the third buoyancy pipe has good stability, the structural strength and the anti-flow stability of the net cage are improved, the vertex angle of the triangle formed by connecting the first buoyancy pipe and the second buoyancy pipe is arranged towards the seawater flowing direction, and seawater flow division is effectively achieved; meanwhile, the first buoyancy pipe and the second buoyancy pipe are obliquely arranged, so that the water flow diffuses towards the two sides and flows backwards along the first buoyancy pipe and the second buoyancy pipe, and the pressure of the incident flow surface of the net cage is effectively reduced.

The present invention provides a photovoltaic power generation device that can automatically track sunlight, including: a photovoltaic panel assembly, a sun detection device, an axial tracking adjustment device, a radial tracking adjustment device, a base, an electric control box and a hydraulic station; the sun detection device is arranged on the photovoltaic panel assembly; the axial tracking adjustment device and the radial tracking adjustment device are both connected to the photovoltaic panel assembly, and the radial tracking adjustment device is connected to the axial tracking adjustment device; the base is connected to the radial tracking adjustment device; the electric control box is electrically connected to the sun detection device and is arranged on the base; the hydraulic station is arranged on the base to provide power oil for the axial tracking adjustment device and the radial tracking adjustment device. The present invention can maximize the use of solar energy, improve the power generation efficiency of solar photovoltaic panels, and can be used normally under various terrains and climatic conditions, and can withstand extreme tests.

The utility model relates to a tensioning and rotating device for a carbon fiber reinforced metal sucker rod, which comprises a tensioning and rotating device body, the tensioning and rotating device body comprises a clamping head, a rotating device and a tensioning device, the clamping head, the rotating device and the tensioning device are arranged on a main machine tool body, and the rotating device comprises a rotating shaft and a rotating driving device. The two rotating shafts are symmetrically mounted at the left end and the right end of the main machine body; the clamping heads are installed on the opposite sides of the two rotating shafts and used for clamping and fixing the sucker rod between the two rotating shafts. The rotating device is connected with the rotating shaft and used for driving the rotating shaft to rotate around the axis of the rotating shaft so as to drive the sucker rod to rotate around the axis of the sucker rod. The tensioning device is connected with the rotating shafts and used for adjusting the distance between the two rotating shafts. The sucker rod can rotate, so that carbon fibers can be wrapped conveniently, the sucker rod is tensioned while being fixed, the sucker rod is kept horizontal all the time, the problem that the middle of the sucker rod is bent and sunken is avoided, and the wrapping effect is better.

The present invention is an assembled prestressing device for a foundation pit steel support structure, which relates to the field of construction engineering, and includes a main connecting body, a secondary connecting body, a sliding tooth plate meshing locking assembly, and a jack. The main and secondary connecting bodies are combined into an integrated device, and the two can only undergo relative displacement along the direction of applying prestress. The jack is used to press the secondary connecting body and the main connecting body against each other to apply prestress. The main connecting body is provided with a middle sliding tooth plate, and the secondary connecting body is provided with an end sliding tooth plate. The two tooth plates form a sliding tooth plate meshing locking assembly, which meshes with each other to achieve the locking of the relative position between the main connecting body and the secondary connecting body after applying prestress, thereby providing prestress to the steel support structure. The structural components of the present invention are simple in form, have sufficient rigidity and strength, are controllable in real time in prestress loading, are easy to install and disassemble, are easy to maintain and overhaul, occupy a small space, and can be reused.

The utility model discloses a capping beam sealing end construction hanging basket which comprises a hanging basket body arranged on the capping beam sealing end side, the hanging basket body is fixedly connected with a capping beam sealing end through a hanging frame, the hanging frame penetrates into the capping beam sealing end and is anchored to the capping beam sealing end, and the hanging basket body is fixedly connected with the hanging frame. The device is simple in structure, easy and convenient to install, good in operation space, low in cost and capable of being recycled, the hanging basket is positioned and installed through the hanging bracket, the device has enough strength, rigidity and stability, the structure is simple and reasonable, structural stress is clear, installation and detachment are convenient and fast, use is safe and reliable, and meanwhile the requirements for standardization, serialization, universalization and safety are met.

The utility model belongs to the technical field of blade punching, and particularly relates to novel blade punching machine equipment which comprises a punching main unit and a plurality of limiting supporting frames. The punching main unit comprises a base, a movable seat, an X-axis driving system for driving the movable seat to reciprocate in the X-axis direction, a mechanical rotation system, a power punching system and a power milling system. The mechanical rotation system comprises a rotation machine head and a rotation cross beam. The power punching system and the power milling system are installed on the same rotary cross beam, the rotary cross beam drives the power punching system and the power milling system to rotate, it is guaranteed that cutters coincide in the milling process, a large supporting piece has enough strength and rigidity, and the power punching system and the power milling system are arranged on the rotary cross beam. In addition, the limiting support is arranged to be adjustable, and therefore the blade machining device can adapt to machining of blades of more sizes.

The present invention discloses a sealed linear motor slide, which is composed of a sealed cavity composed of a slide rail, a steel belt, etc. The secondary design of the linear motor of the slide is modular, and a plurality of modular linear motor secondary screws are fixedly mounted on the bottom of the sealed cavity. There are an upper slide and a lower slide, and a slide raceway corresponding to the slide raceway. A plurality of steel balls are arranged between the slide raceway and the slide raceway for rolling, and they together provide rolling guide support for the slide. The upper slide is also designed with a breathing hole to improve the heat exchange efficiency between the linear motor in the sealed cavity and the external environment of the slide. The main structure of the lower slide is the primary part of the linear motor, and the lower slide is relatively independent of the upper slide. The lower slide is modular in design, and the number of windings of the lower slide can be changed to provide a fixed driving force to meet the different working conditions of the linear motor slide. Different lower slides can be shared with the same upper slide, so that only one upper slide with an optimal design length is needed to meet the different thrust requirements of the slide.

The invention discloses a bionic large-deformation C / PEEK composite material skin structure capable of being recovered for multiple times, and belongs to the field of wing skins. The novel jellyfish type honeycomb unit structure is provided by referring to the characteristics of efficient propulsion and a flexible structure when the jellyfish swims in water, and the extensibility of the structure is improved, the stress strain concentration is reduced and the aircraft instability phenomenon is reduced through uniform curvature and increase of the number of large-radian ligaments. The jellyfish type honeycomb structure unit is mainly composed of the center semicircular ring and the multiple ligaments, the structure is simple, and the structure can be conveniently optimized and improved; under the action of an external load, the semi-circular rings can rotate, at the moment, the multiple ligaments connected with the circular rings can deform, the circular rings and the ligaments in the structure increase additional design parameters for structural design, and the skin structure has enough rigidity under the aerodynamic load.

The utility model discloses a kind of dry concrete sleeve tenon-and-mortise connection integrated modular building systems, including top plate, bottom plate and the integrated several boxs by four corners L-shaped shear wall and partition wall, the wall body reinforcement of the L-shaped shear wall is composed of several main force steel bars in vertical direction and several structural steel bars in horizontal direction, the L-shaped shear wall is equipped with connecting recess in the upper and lower ends of the main force steel bar, the outer end of the structural steel bar.All adopt factory integrated production and processing, box adopts basalt rib, the horizontal and upper and lower connection of box and box all adopt standard high-performance concrete suite connection, the transmission of horizontal force between box is transmitted by the friction and mechanical bite force formed by suite and recess, improve the overall performance of structure, can realize horizontal load transmission to two directions simultaneously;The present application is high in degree of assembly, can realize the factory production of structure decoration integration, and can realize the diverse combination between box.

The application discloses a kind of open roof rail vehicle body structure, including side wall, underframe, upper floor and staircase, the two sides of upper floor are connected with side wall, the lower end of staircase is connected to underframe, the upper end of staircase is connected to upper floor;Side wall, staircase and upper floor are all used profile structure, upper floor, staircase all include upper panel, lower panel and rib plate, rib plate is connected with upper panel, lower panel simultaneously, the lower panel of upper floor is welded and connected with side wall, the upper panel of upper floor is welded and connected with side wall by first connecting plate;Horizontal direction is extended on side wall and welded and fixed with backing plate, backing plate is used to support the lower panel of staircase.The application effectively solves the welding problem of staircase and underframe, side wall, and staircase is welded simply, and the stiffness and strength are sufficient, and is not easy to deform;Meanwhile, the application also avoids staff to side wall and upper floor in the lower of upper floor and upward welding, is favorable to guarantee the welding quality.

The utility model relates to the technical field of lifting operation safety auxiliary devices. The electricity approaching alarm device for the self-propelled hoisting machinery comprises a signal transmitter and a signal receiving audible and visual alarm, the signal transmitter comprises a signal transmitter main body and a transmitter mounting frame; the emitter mounting frame comprises a roller, a roller rotating shaft, a clamping screw rod, a clamping nut and two clamping plates; the signal transmitter main body is arranged in the roller, and the roller is rotationally connected with the roller rotating shaft; the two clamping plates are arranged at the two ends of the roller rotating shaft; at least one clamping plate is in sliding fit with the roller rotating shaft; a clamping screw rod is arranged between the two clamping plates in a penetrating manner; the clamping nut is in threaded fit with the clamping screw rod; a clamping opening is formed between the end parts of one sides of the two clamping plates; the two clamping plates can be driven to be clamped on the two sides of the movable pulley support by tightening the clamping nuts. The device overcomes the defect that when an existing device is installed on a lifting hook assembly, normal operation of hoisting machinery is easily hindered.

The utility model relates to a sapphire grinding device and a wandering star wheel thereof.The wandering star wheel comprises a wheel disc body and wheel teeth formed on the outer circumferential face of the wheel disc body, the wandering star wheel is used for being placed on a lower grinding disc of the sapphire grinding device, and the wheel teeth are used for being meshed with a sun gear of the sapphire grinding device and a gear ring located on the outer side of the sun gear; a plurality of through holes extending in the axial direction of the wheel disc body are formed in the wheel disc body, each through hole is used for allowing a sapphire wafer to be embedded so as to fix the sapphire wafer, the through holes comprise the first through holes and the second through holes, the first through holes are formed in the circumferential direction of the wheel disc body at intervals, and the second through holes are formed in the circumferential direction of the wheel disc body at intervals. The multiple second through holes are located in the inner sides of the multiple first through holes and arranged at intervals in the circumferential direction of the wheel disc body, and the minimum distance between the hole wall of each first through hole and the outer circumferential face of the wheel disc body is 9.30 mm to 9.34 mm. The wandering star wheel can fix more sapphire wafers, so that the grinding processing efficiency of the sapphire grinding device is improved.