845 results about "Mechanical design" patented technology

The invention relates to the technical field of manipulators, in particular to a feeding and discharging manipulator for mechanical design and manufacture, which comprises a base, a multi-shaft mechanical arm, a hydraulic tank, a guide frame, a sliding plate and the like, the multi-shaft mechanical arm is mounted at the top of the base, the hydraulic tank is connected to the execution end of the multi-shaft mechanical arm, and the guide frame is connected to the hydraulic tank; sliding plates are slidably connected to the front side, the rear side, the upper side and the lower side in the guide frame and slidably penetrate through the guide frame. The telescopic rod of the air cylinder extends to drive the four clamping jaws to move in the direction close to one another, the clamping jaws are closed, the clamping jaws can clamp a workpiece, and the clamping jaws can be independently controlled to be opened and closed, so that flexible adjustment can be conducted according to the shape and size of the workpiece, the workpiece is prevented from being damaged, and the working efficiency is improved. And multiple faces of the workpiece can be clamped at the same time, it is guaranteed that clamping force is evenly distributed, and clamping stability is improved.

An electrical propulsion system comprises an inverter, an electrical motor assembly, an assembly, and a rotor position sensor. The inverter comprises a printed circuit board assembly (PCBA). The electrical motor assembly comprises a stator and a rotor. The assembly is configured to rotate a propeller and comprises a moving component and a stationary component. The rotor position sensor comprises at least one sensor coupled to the PCBA, and a magnet located on the moving component. The at least one sensor is configured to detect a magnetic field of the magnet through the stationary component.

The invention provides construction waste and slag mixed crushing and powder brick making equipment, and relates to the field of construction waste resource utilization. The equipment takes an innovative crushing and brick making process as a core, and efficient conversion of construction waste and slag is realized through efficient mechanical design and an intelligent control system. The equipment mainly comprises the following key components: a collision seat and a rolling seat for preliminary crushing, a connecting rod and a rotating seat are arranged in the collision seat and the rolling seat, and the lower side wall is rotationally connected with a conical crushing roller; the internal output end of the supporting inner frame is fixedly connected with the rotating base, and the upper side wall of the supporting inner frame is connected with the rotating shaft and the throwing frame; a supporting inner cavity is formed in the adjusting sleeve on the outer side wall of the rolling base. Through multi-stage crushing and intelligent control, the problems that in the prior art, the crushing efficiency is low, particles are not uniform, and the automation degree is low are effectively solved, an efficient and environment-friendly solution is provided for resource utilization of construction waste and furnace slag, and industrial technical progress is promoted.

The invention discloses a precision clamp device for machining special-shaped workpieces in mechanical design, and relates to the technical field of mechanical manufacturing, the precision clamp device comprises a base main body, a reference bottom plate, a plurality of rotating shafts and corresponding elastic clamping blocks, the reference bottom plate is arranged on the base main body, and positioning slots are formed for the rotating shafts to be rotatably mounted; the rotating shafts can independently rotate and drive the elastic clamping blocks to deflect to adapt to the irregular surface of the special-shaped workpiece, the rotating shafts comprise rotating blocks matched with the inserting grooves and adjusting sliding grooves extending along the shaft length, and the rotating shafts are evenly distributed on the circumference of the reference bottom plate; an elastic clamping block is connected with a transmission screw and an adjusting nut, a linear sliding block is arranged to be matched with an adjusting sliding groove, a self-adaptive contact is arranged on the side, facing the clamping center, of the elastic clamping block, the contact is provided with an elastic protection contact end cover, and a stress sensing connecting rod and an elastic buffering spring are installed in the contact. A movable rod penetrates through the base body, one end of the movable rod is connected with a control handle, the other end of the movable rod is connected with a self-adaptive pressing plate, the movable rod is sleeved with a reset spring, the pressing plate is provided with a profiling abutting block, and the clamping stability is improved.

A bathroom lock structure is provided, which includes an outdoor handle and an indoor handle. The indoor handle is provided with a knob with a spiral groove, a deblocking button in the indoor handle can be slid to cause a column on the deblocking button to be clamped in the spiral groove, a safety rod located in a first square hole within in the knob is driven to rotate. A locking cam in a shielding cover on the outdoor handle is driven to rotate by a rotation of the safety rod, thereby achieving locking or unlocking function. This bathroom lock structure achieves reliable locking and unlocking functions through exquisite mechanical design, thereby improving flexibility and convenience of use. The state of the lock can be observed through a display hole on the outdoor handle, allowing a user to clearly understand a current state of the lock.

The utility model discloses an accessory, relates to the technical field of AVG forklifts, and aims to solve the problems that in the prior art, related clamping accessories or other machines are adopted by the AVG forklifts, the design is complex, a vehicle body is greatly influenced, the structural weight of the whole vehicle and the structure of the accessories are influenced, and meanwhile application scenes are easily limited. The AVG forklift body comprises a main support, two plug pins are fixedly connected to one side of the main support, first electromagnets are arranged on the upper surfaces of the two plug pins, second electromagnets are arranged at the ends, close to the main support, of the plug pins, and the first electromagnets and the second electromagnets are installed in a submerged mode; the AVG forklift body comprises a driving main machine, a traveling system used for traveling, a hydraulic system used for lifting and an electric power system used for supplying power are arranged in the driving main machine, a radar range finder is arranged below the driving main machine, and an anti-collision head is arranged at one end of each pin.

The invention belongs to the technical field of mechanical design, and discloses a service performance traction assembly interface ideal prestress distribution inversion design method and a related device, and the method comprises the steps: carrying out the feature mapping of assembly interface morphology-stress on a matching surface, and obtaining a contact pressure value and a relative coordinate of each node; according to the contact pressure value and the static contact stress, performing static ideal contact stress distribution inversion to obtain static ideal contact stress distribution; and according to the static ideal contact stress distribution, predicting the morphology layout driven by the static contact stress distribution of the assembly interface. According to the method, the morphology layout driven by the static contact stress distribution of the assembly interface can be assembled, machining can be carried out on the assembly interface according to the morphology layout of the assembly interface, the connection performance uniformity of the assembly interface in the dynamic service state can be effectively improved, and the purpose of improving the dynamic connection performance of high-end equipment parts such as aero-engines is achieved.

The invention discloses an AI processing method and system for long-term memory of mechanical design knowledge, and the method comprises the steps: carrying out the semantic analysis and feature extraction of heterogeneous knowledge, such as parameterization formulas, engineering charts, technological processes and design principles, in the field of mechanical design through a multi-agent collaborative learning system; and establishing a multi-dimensional modular knowledge base and context-based Prompt strategy coupling mechanism. The method solves the problems of low efficiency, insufficient analysis accuracy, limited innovation support capability and the like in the existing mechanical design knowledge processing technology, and particularly solves the technical problems of high calculation complexity, inaccuracy in reasoning, poor adaptability and the like when multiple types of design knowledge are processed. Through the implementation of the method, the processing efficiency of the design knowledge and the design automation level are remarkably improved, the technical threshold of a designer is reduced, the design period is shortened, efficient analysis, accurate matching and innovative application of the mechanical design knowledge are achieved, and powerful support is provided for intelligent development of mechanical design.

The invention provides a hydraulic closed-loop tilling depth control system based on multi-sensor fusion in order to solve the problems that traditional tilling depth control is low in precision, poor in stability and the like. The system collects data through an inclination angle sensor, a displacement sensor, a posture sensor and the like, and after fusion processing, a hydraulic cylinder drives a parallel four-bar mechanism to adjust the tilling depth of the subsoiler. The system has three innovations: firstly, a dynamic model is constructed by using multi-source sensor cooperation and sliding mode variable structure control, the anti-interference capability is improved by combining a control strategy, and accurate tilling depth control is dynamically realized according to soil conditions; 2, a parallel four-bar mechanism is mechanically designed to be combined with hydraulic drive, terrain interference is eliminated by utilizing mechanism characteristics, and the control precision and unbalance loading resistance are enhanced; and thirdly, a bidirectional hydraulic lock and a manual-electric dual-mode oil way are adopted for hydraulic pressure, so that reliable tilling depth control and continuous operation are guaranteed. The three innovations are fused, and a high-precision, strong-stability and ultra-reliable tilling depth control solution is provided for saline-alkali soil agriculture.

The invention relates to a lithium battery mower with an automatic obstacle crossing structure and an obstacle crossing method thereof.The lithium battery mower comprises a fixed rack, the fixed rack is provided with a crawler device used for driving the fixed rack to move forwards, the front end of the fixed rack is provided with a movable rack, and the movable rack is rotationally provided with a first universal wheel; a cutting mechanism used for mowing is arranged on the movable rack, side supports are arranged on the two sides of the fixed rack respectively, and second universal wheels are arranged below the side supports; a guide rail is arranged on the side support, an adjusting sliding block fixed to the movable rack is arranged on the guide rail in a sliding mode, a driving shaft is rotationally arranged on the fixed rack, and the driving shaft is matched with the adjusting sliding block through a first linkage structure. When the mowing machine encounters an obstacle, the front end of the fixed rack and the cutting knife can automatically adjust the posture to be lifted up, stable obstacle crossing is achieved, and the problem that an existing mowing machine cannot actively cross the obstacle, and consequently the working efficiency is low is solved.

The invention relates to the field of ship deck mechanical design, and discloses a lightweight design method of an anchor and mooring equipment winding drum device, which comprises the following steps: S1, establishing a finite element model: establishing an initial three-dimensional model of the anchor and mooring equipment winding drum device, and carrying out regional division on the initial three-dimensional model to obtain a design domain and a non-design domain, applying a preset load condition and a boundary condition to the initial three-dimensional model so as to establish a finite element model; and S2, generating a conceptual configuration: based on the finite element model, carrying out topological optimization in the design domain to generate a material space distribution scheme representing an optimal force transmission path, and the scheme is the conceptual configuration. According to the method, the innovative structural configuration representing the optimal force transmission path is generated through the topological optimization technology, and the limitation of a traditional design method on structural innovation and optimization efficiency is systematically solved in combination with a parameterized multi-objective optimization process.

The external thread grinding machine comprises a machine body, a workpiece main shaft, a center frame and a grinding wheel main shaft, a Z-direction sliding plate and an X-direction sliding plate are arranged on the upper end face of the machine body, the workpiece main shaft is installed on the Z-direction sliding plate, and the center frame is installed on the Z-direction sliding plate and used for supporting the outer circle of a workpiece. The grinding wheel spindle is arranged on the X-direction sliding plate, the outer circle of one end of a workpiece can be clamped through the workpiece spindle, then the outer circle of the workpiece is supported by adjusting the center frame, grinding operation of external threads is completed, grinding of a center hole and jacking of a tailstock are not needed, the technological process is optimized, the machining cost is reduced, and the machining efficiency is improved. The invention belongs to the technical field of mechanical design.

The invention relates to a negative pressure quantitative adjustment and fine adjustment system for vacuum sizing of a drip tape production line, and belongs to the field of mechano-electronics. By adopting a mode of combining a mechanical design technology, a microelectronic technology, a communication technology, a pneumatic technology and the like, quantitative adjustment and fine adjustment of the vacuum degree in the vacuum sizing box are realized through independent work or matched and combined work of the air inlet nozzles with different calibers; and the combination mode of the air inlet nozzles stored in the EEPROM storage chip is called according to the production requirements of different pipe diameters and wall thicknesses, so that the production efficiency is effectively improved, and the purposes of accurately determining the diameter and the pipe wall thickness of the drip irrigation belt production line are achieved. The whole system has the advantages of high precision, low cost, convenience in use, high efficiency and the like, and has a wide market prospect.

The utility model relates to a special oil pumping device for a barreled oil drum, and aims to solve the problems of low efficiency, more oil residues, poor cleanliness, poor adaptability and the like in a traditional oil pumping mode. According to the device, efficient and clean extraction of oil at the bottom of the oil drum is achieved through precise mechanical design and the synergistic effect of parts. Specifically, the device comprises an oil suction pipe, a positioning oil suction disc seat, a spring, a pressure adjusting sleeve, an oil suction pipe positioning plate, a flat-head silencer and the like. The spring and the pressure adjusting sleeve ensure that the positioning oil suction disc seat is tightly attached to the bottom of the oil barrel, and thorough oil pumping is achieved. The filter screen filters impurities to protect the purity of the oil product; the flat-head silencer realizes air communication and prevents external pollution; the oil suction pipe positioning plate adjusts the position according to the size of the oil drum to ensure that the oil suction pipe clings to the inner wall. The oil pumping device has the advantages that oil pumping efficiency and thoroughness are improved, oil purity is protected, applicability and flexibility of the device are enhanced, cleaning cost and environmental pollution are reduced, and the like.

The utility model discloses an electric welding table for mechanical design and manufacture, which relates to the field of mechanical design and manufacture, and comprises an electric welding table main body and a top plate, the top of the electric welding table main body is respectively provided with a fixed seat and a blocking cover, the two sides of the inside of the blocking cover are respectively provided with an inclined plate, and the top of each inclined plate is provided with a material pushing assembly. Through the arrangement of the material pushing assembly, when welding slag accumulated on the inclined plate needs to be cleaned, a worker pulls a pull rod through a pull plate, the pull rod drives a clamping block to move, the clamping block moves out of a clamping groove, at the moment, the material pushing plate is not limited any more, and then the worker can push the material pushing plate to move through a push rod; the material pushing plate is arranged on the inclined plate, so that the material pushing plate can push welding slag accumulated on the inclined plate to move, the welding slag accumulated on the inclined plate is pushed into the through opening, it is prevented that part of the welding slag is accumulated on the inclined plate and is difficult to clean, and in this way, workers do not need to directly clean the welding slag through hands, and no external tool is needed for cleaning.

The invention relates to the technical field of mechanical design and manufacturing, and provides a single-motor anti-backlash mechanical rotating platform. The rotating platform comprises a horizontal adjusting mechanism, a gear anti-backlash mechanism, a truss mechanism and an optical platform. The gear anti-backlash mechanism is arranged on the side face of the rotating base. The single-motor high-elasticity compensation gear anti-backlash mechanism is easy and convenient to control and low in cost, meanwhile, the influence of backlash backlash is solved, backlash errors and kick errors are reduced when an optical platform rotates in the forward direction and the reverse direction, transmission precision and stability are improved, and gear abrasion is reduced. Through the splicing type truss mechanism designed in a lightweight mode, the multi-unit optical platform and the adjusting mechanism, the mechanical rotating platform which is good in rigidity, high in plane precision and large in assembling space can be spliced, assembling is easy, and hoisting is convenient; the rotating platform is especially suitable for large precise instruments such as large telescopes and the like requiring large assembly space.

The invention relates to the technical field of test protection, and discloses an electric pulse driven MLCC continuous test system which is composed of a motor selection and control module, a pulse parameter optimization module, a mechanical design optimization module, a closed-loop control and real-time monitoring module and an operation instruction and maintenance module. According to the invention, the motor with high-precision position control and motion smoothness is selected according to needs, stable and accurate motion of the capacitor in the test process is ensured, scratches caused by inharmonious motion are avoided, the acceleration and speed of the motor are controlled by setting proper pulse frequency and width, and the test precision of the capacitor is improved. And the capacitor is prevented from moving violently when entering and leaving the test area, so that the impact on the end is reduced, and the beneficial effect of effectively avoiding the end scratch while ensuring the test efficiency is achieved.

The invention discloses a supporting structure for reducing the degree of freedom of an electromechanical transmission output shaft and an output gear, which belongs to the technical field of mechanical design and comprises a cylindrical pin, the output shaft, a flange plate, the output gear and a bearing. The flange plate is mounted on the box body; the flange plate is supported on the output gear through a bearing; one end of the output shaft is coaxially sleeved in an axial blind hole A in the output gear; the output gear and the output shaft are coaxially connected through a cylindrical pin; one end of the cylindrical pin is in transition fit with an axial blind hole B in the output gear, and the other end of the cylindrical pin is in transition fit with an axial blind hole C in the output shaft. According to the invention, the cylindrical pin is utilized to restrain the redundant degrees of freedom of the output gear and the output shaft in the axial direction and the radial direction, and the coaxiality between the output shaft and the output gear is improved, so that the assembly error is reduced, the dynamic load is reduced, and the overall performance and reliability of an electromechanical transmission system are improved.

The invention belongs to the technical field of mechanical design, and particularly relates to a method and device for optimizing structural parameters of a sliding shoe bearing oil cavity of a mill. The method comprises the steps that firstly, the influence degree of each to-be-optimized oil cavity structure parameter of the mill sliding shoe bearing on the oil film bearing characteristic is analyzed, and all the oil cavity structure parameters are divided into two types according to the influence degree, namely driving change parameters and driven change parameters; then establishing a regression model between the oil film bearing characteristic parameters and the active change parameters and a regression model between the driven change parameters and the active change parameters; and finally, solving to obtain optimal oil cavity structure parameters by combining all the established regression models with the goal that the oil film bearing characteristic parameters meet the requirements. The regression model established by the invention can reflect the mutual influence relationship among the oil cavity structure parameters, and the influence relationship is considered to optimize the oil cavity structure parameters, so that the optimization performance of the oil cavity structure parameters is improved.

A connecting rod-synchronized mechanical gripper, pertaining to the field of mechanical design. The mechanical gripper comprises a power source outputting power in the form of linear motion, the power source being rotatably disposed; and comprises a first gripper finger (4) and a second gripper finger (3) which are oppositely arranged, the first gripper finger and the second gripper finger both being rotatably disposed, and the first gripper finger and the second gripper finger being connected to one another by means of a transmission rod (8). The power source drives the first gripper finger to rotate, such that under the driving of the transmission rod, the first gripper finger and the second gripper finger are synchronously spread out or synchronously carry out gripping. The connecting rod-synchronized mechanical gripper can achieve synchronous gripping and loosening of the gripper fingers on both sides, which greatly reduces the space of motion required for gripping a drill pipe by the mechanical gripper, and facilitates optimization of the structure of the mechanical gripper and related components. Meanwhile, the synchronized motion of the gripper fingers on both sides effectively avoids position deviation of the drill pipe when being gripped, which better ensures the accuracy in delivery of the drill pipe.

The invention discloses an adjustable automatic control head needle twisting device. Comprising a base, a cylindrical seat fixed to the top of the base, a rotating chassis rotationally installed at the top of the cylindrical seat, a top column fixed to the top of the rotating chassis, a top plate installed at the top end of the top column, a lifting plate arranged at the bottom of the top plate, a lifting structure arranged between the lifting plate and the top plate, and a first rotating motor fixed to the top of the lifting plate. The device further comprises an adjustable control system. According to the adjustable automatically-controlled scalp needle twisting equipment provided by the invention, through an accurate control system and mechanical design, automation of twisting operation is realized, the precision of twisting angle and force is remarkably improved, the problem of instability of manual operation is solved, physical exhaustion of an acupuncturist is reduced through automatic operation of the equipment, and the working efficiency is improved. The device is simple in structure and convenient to use, the device can concentrate on treatment, the overall treatment efficiency is improved, the safety of equipment operation in the treatment process is guaranteed through multiple safety protection measures, and possible medical negligence is avoided.

The invention provides a hydraulic system structure capable of detecting internal leakage of an isolating valve and an internal leakage detection method, relates to the technical field of mechanical design of hydraulic systems, and solves the limitation problem that an existing detection mode is time-consuming and labor-consuming. The hydraulic system structure is sequentially connected with an isolating valve, a main distributing system oil source pipeline and a main distributing valve from a pressure oil tank; the main distributing valve is connected with a first servomotor and a second servomotor, the first servomotor and the second servomotor are both connected to the control ring, and the main distributing valve is further connected to the oil collecting tank through a cavity closing oil return pipeline. The isolating valve is further connected with a control valve, the control valve is provided with an oil supply port P, an oil return port T, a first working port A and a second working port B, the oil return port T is connected to the oil collecting groove through an oil discharge main pipeline, the first working port A is communicated with a closed piston cavity of the isolating valve, and the second working port B is communicated with an open piston cavity of the isolating valve; whether the isolating valve has an inner leakage fault or not can be quickly and conveniently determined by detecting whether the oil discharge main pipeline leaks oil or not.

The invention relates to the technical field of casting, and discloses a casting device for precision castings, which comprises a main body part, a base, a sliding rail fixedly connected to one side of the base, a sliding seat slidably connected to the sliding rail, a mold part, a first mold block and a second mold block, a first sealing assembly is installed on the side, facing the second mold block, of the first mold block, and a second sealing assembly is installed on the side, facing the first mold block, of the second mold block, through precise mechanical design and hydraulic driving, rapid and precise closing of the mold is achieved, and the size precision and the surface smoothness of a casting part are improved. The application of the sealing assembly and the air bag system effectively prevents the leakage of the molten metal, ensures the cleanness and safety in the casting process, and improves the rate of finished products at the same time. The visual monitoring and manual adjusting functions of the inflation state of the air bag simplify the operation process, the efficiency and convenience of casting operation are improved, and meanwhile the sealing reliability of each casting process is guaranteed.

The invention provides a truss bridge node supporting device and a truss bridge. The truss bridge node supporting device comprises an upper bearing plate, a lower bearing plate, a corrugated metal plate, a first arc-shaped plate and a second arc-shaped plate. The upper bearing plate is detachably connected with a node of the truss bridge, and the two ends of the corrugated metal plate are fixedly connected with the upper bearing plate and the lower bearing plate respectively; the first arc-shaped plate and the second arc-shaped plate have the same structure and are U-shaped metal plates with openings; the upper end and the lower end of the second arc-shaped plate are fixedly connected with the upper bearing plate and the lower bearing plate correspondingly. Wherein the first arc-shaped plate, the second arc-shaped plate and the corrugated metal plate jointly support nodes of the upper bearing plate and the truss bridge, and the lower bearing plate is relatively fixed to the ground or the bridge floor. According to the truss bridge node supporting device, reliable supporting of the truss bridge node is achieved, and the truss bridge node supporting device can be replaced in time when rusted; according to the mechanical design of the overall structure, the safety and durability of the structure are considered, and economical efficiency and practicability are also considered.

The invention discloses a cylindrical material conveying device based on a horizontal linear motor, and belongs to the field of mechanical design and manufacture, the device comprises a magnetic flux switching linear motor, a stator supporting device, a material supporting device, a material pushing device and a sensor device, and the magnetic flux switching linear motor is a driving source and is of a horizontal bilateral structure; the reinforcing ribs in the stator supporting structure adopt a dual-function coupling design, so that the cost can be reduced and the efficiency can be improved; the material supporting device is fixedly connected with the stator supporting structure and is in linear contact with the cylindrical material; the pushing device is fixedly connected with the linear motor rotor and is connected with the stator supporting structure through a linear guide rail sliding block; the sensor device is located on one side of the linear motor, and a signal line is of a spring coil structure. The rotor is simple in structure, easy to maintain, good in natural heat dissipation effect, compact in overall structure and high in space utilization rate, and the problems that an existing same-type cylindrical material conveying device is complex in rotor structure, poor in natural heat dissipation effect and low in overall structure space utilization rate are solved.

The invention relates to a batch automatic design method and system for turbine end wall modeling, belongs to the technical field of turbine mechanical design, and provides non-axisymmetric end wall modeling design for an axial flow turbine by taking a trigonometric function and a Bezier curve as axial modeling functions and taking a sine function as a circumferential modeling function. Meanwhile, the non-axisymmetric end wall curved surface is accurately drawn through programming, and a point cloud file of the three-dimensional curved surface is generated. And then the point cloud file is imported into three-dimensional modeling software for three-dimensional curved surface modeling, and automatic batch design of the non-axisymmetric end walls of the axial flow turbine is achieved. The end wall near the pressure surface is convex, and the end wall near the suction surface is concave, so that the airflow of the end wall near the pressure surface is accelerated to flow, the static pressure is reduced, the airflow of the end wall near the suction surface is decelerated, the static pressure is increased, and the non-uniformity of circumferential distribution of the static pressure in the end area is reduced; flow separation among the blades is effectively improved, vortex shedding is reduced, pressure loss is reduced, and turbine performance and efficiency are improved.

The utility model discloses a suction spout head and household suction equipment that conforms to ergonomic design. The suction spout head includes a water spray nozzle, a spout head body, a water supply pipe, a water suction pipe, and a handle connector; a first mounting portion, a second mounting portion, and a hand-held portion are arranged inside the handle connector; the first mounting portion is located at the lower portion of the second mounting portion, and the hand-held portion is formed by extending outward from the middle portion of the second mounting portion and is in an arc shape; the first mounting portion, the second mounting portion, and the hand-held portion are integrally formed; the water supply pipe is connected to the water spray nozzle, and the water suction pipe is connected to the spout head body, and the water supply pipe and the water suction pipe are respectively mounted on the first mounting portion and the second mounting portion of the handle connector. The present application replaces the simple clamp assembly in the prior art by adding a handle connector, so that the handle connector has both the function of firmly mounting the water supply pipe and the suction pipe and the function of an external handle that conforms to ergonomic design.

The invention discloses a hoop reinforcing structure and method for welding a hollow sphere joint, and belongs to the technical field of steel structure reinforcing. Comprising a welding hollow sphere joint, a reinforcing piece, structural adhesive, a stud and a tightening piece. The welding hollow ball joint is composed of a hollow ball and a plurality of round pipes, hollow ball holes and round pipe holes are formed in the surfaces of the hollow ball and the round pipes respectively, reinforcing pieces are arranged in the junction areas of the hollow ball and the round pipes, the reinforcing pieces and the welding hollow ball are connected through structural adhesive, the reinforcing pieces are fixed to the surface of the hollow ball through studs, and tightening pieces are arranged on the surface of the reinforcing pieces in a staggered mode. The tightening piece is formed by splicing common bolts. The reinforcing piece and the tightening piece are mechanically designed and industrially produced. The influence of site construction difficulty and welding residual stress is reduced, through quadruple protection of the structural adhesive, the clamping piece, the stud and the tightening piece, it can be ensured that the reinforcing piece is tightly attached to the welded hollow sphere joint, and the bearing capacity, durability and safety of the welded hollow sphere joint are effectively improved.

The invention discloses a multi-software combined special-shaped superconducting coil structure design method, and aims to optimize a modeling mode of a special-shaped superconducting coil and improve modeling efficiency on the premise of ensuring result precision. According to the method, for a three-dimensional special-shaped complex superconducting magnet structure, a platform is built based on a Python language, and a multi-software combined geometric modeling system is built by combining mechanical design software SolidWorks, finite element software Abaqus and electromagnetic analysis software Opa-3d. The method comprises the following steps: firstly, establishing a geometric model through SolidWorks software, and outputting the geometric model in a general file format; and then, importing the geometric file into Abaqus to carry out automatic unit division. Geometric model data files of the divided units are obtained through calculation, geometric coordinates of unit nodes are read in sequence, the geometric coordinates are arranged into coil geometric data files which can be recognized by Opera-3d, and finally geometric modeling is completed in Opera-3d. According to the method, the blank that the coil in Opera-3d cannot be directly imported through mechanical design software is filled up, and the geometric modeling mode of the coil in the software is enriched.

The invention concerns a toothbrush comprising a brushing roller (4), a drive shaft with a first end secured to said brushing roller (4), said toothbrush comprising a first casing (30) within which runs said drive shaft, as well as a cover (8), made of a first material, having an internal face facing said roller (4), said drive shaft comprising an extremal segment emerging from said first casing (30) and including said first end, said brush comprising a bearing receiving said extremal segment, said toothbrush comprising a protective piece (9) made of a second material softer than said first material, said protective piece (9) cladding said internal face and projecting from the latter to form a lip (90), said protective piece (9) forming said bearing.Oral hygiene instruments.