20 results about "Middle plane" patented technology

The invention provides a reconfigurable parallel mechanism capable of switching joint rehabilitation modes and a design method thereof.The reconfigurable parallel mechanism comprises a first motion branch chain, a second motion branch chain, a third motion branch chain, a movable platform and a fixed platform, and the movable platform is connected with the fixed platform through the first motion branch chain, the second motion branch chain and the third motion branch chain; the first motion branch chain and the second motion branch chain are both of a CRC structure, the third motion branch chain is of a CCC structure, and motion pairs, fixedly connected with the movable platform and the fixed platform, of all the motion branch chains are vertically symmetrical along the middle plane. By means of rapid switching of a two-rotation and one-movement ankle joint rehabilitation mode and a two-movement and one-rotation knee joint rehabilitation mode, configuration reconfiguration of the parallel mechanism is achieved, operation is simple, the motion trail of the reconfigurable parallel mechanism coincides with the joint motion axis, and the parallel mechanism has the advantages of being high in rigidity and precision.

The invention provides an analogy simplified analysis method and device for a worm grinding wheel grinding gear and a medium, belongs to the field of grinding machining, deduces and calculates a single-time grinding material removal area of a specific tooth surface through analysis of movement and contact behaviors on a middle plane, and calculates a single-time grinding material removal area of the specific tooth surface on the basis of a material removal rate equivalent principle. The worm grinding wheel gear grinding process is equivalently simplified into plane grinding. According to the method, equivalence of movement and contact behaviors in the grinding process is considered, grinding force and thermal effect equivalent analysis is achieved based on the material removal rate equivalent principle, and obtained equivalent plane grinding process parameters directly reflect the grinding behavior, grinding force and thermal characteristics of a worm grinding wheel grinding gear; the complex worm grinding wheel gear grinding process can be subjected to equivalent simplified research on a plane grinding platform, the experiment cost is reduced, experiment result analysis is simplified, and optimization analysis of worm grinding wheel gear grinding process parameters is facilitated.

A B-rep processing method for performing a structural simulation of a mechanical part is disclosed. The method includes providing a mid-plane of a B-rep representation of the part. Each mid-plane represents a thin portion. The method includes calculating a bond line corresponding to a respective bond of the respective mid-plane based on a boundary line of the respective mid-plane. The method includes determining one or more groups. Each group contains an end of the bond wire to be connected. One or more groups are determined by identifying connection boundary lines corresponding to the bond lines. The method includes, for each determined set of ends, determining a plurality of junction points. The multi-junction point is a connecting point of the tail end. The method includes connecting the bond wire using the determined multiple bond points. The method includes connecting a mid-plane to a connected bond wire.

The utility model discloses an anti-deformation floor deformation joint cover plate made of rigid materials, which comprises a deformation joint cover plate erected between two building bodies, and the deformation joint cover plate comprises a fixed plate, a tooth-shaped plate and a movable plate; the fixing plate is symmetrically designed and fixed to a building through fixing bolts, a slope is arranged at one end of the fixing plate, a sliding groove is formed in the other end of the fixing plate in a downward extending mode, and tooth-shaped grooves equal in interval and length are formed in the middle of the fixing plate. The tooth-shaped plate is symmetrically designed, one end of the tooth-shaped plate is a tooth-shaped end matched with the middle part of the fixed plate, and the other end of the tooth-shaped plate is a connecting section connected with the movable plate; the movable plate is in the middle plane design, the two ends of the movable plate extend downwards to be provided with sliding ends and are arranged in the sliding grooves in a sliding mode, and grooves used in cooperation with the connecting sections are formed in the connecting positions of the plane and the sliding ends. Through the arrangement of the fixed plate, the tooth-shaped plate and the movable plate, under the bearing condition, the function of adapting to deformation joint changes is achieved, and deformation and damage of the cover plate are prevented.

The application discloses a vertical scallion processing device, which comprises a whole base frame including a middle plane A and an upper plane B; a center rotating shaft rotating assembly is arranged on the plane A, and a plurality of acrylic cylinders for placing scallions are arranged on the center rotating shaft rotating assembly; a cutter assembly is arranged on the plane A and the plane B, and is used for cutting two ends of the scallions; a collecting assembly is used for cleaning and collecting the cut scallion heads; a rotating telescopic brush assembly is used for brushing away the scallion waste skins; a packaging assembly is arranged below the plane A, and is used for packaging the scallions; a pressure sensor weighing assembly is arranged below the plane A, and is used for clamping and weighing the packaged scallions; a labeling assembly is arranged below the plane A, and is used for labeling the weighed and packaged scallions; and a sorting assembly is arranged below the pressure sensor weighing assembly, and is used for classifying and placing the labeled scallions. The application solves the problems that the current manual scallion processing procedure is complicated, and the current scallion processing device has single functions and too many manual operation links.

A connection device for a pipe (4) provided with ribs on the circumference has a pipe receptacle (1) with a receptacle opening for accommodating one end of the pipe (4) and at least one locking element (3) for fixing the pipe (4) in the pipe receptacle (1). The pipe receptacle (1) has a longitudinal middle plane (M) which runs through the receptacle opening. The locking element (3) has a first portion (S1) which allows movement of at least a portion of the locking element relative to the pipe receptacle (1) and a second portion (S2) which is configured for engaging into a corrugation groove (41) of the pipe (4) provided with ribs on the circumference. The first portion (S1) is closer to the longitudinal middle plane (M) than the second portion (S2) at least when the pipe (4) is introduced and fixed. The connection device according to the invention enables simple, sealed and secure fixing of the pipe.

The embodiment of the utility model discloses an electronic device, which is characterized in that a first branch and a second branch which extend towards different sides of a middle plane are arranged on a main supporting piece provided with a display screen, a first sound channel loudspeaker is arranged on the first branch, and a second sound channel loudspeaker is arranged on the second branch. A hardware structure capable of playing left channel and right channel audio respectively is provided. The control circuit can control the first sound channel loudspeaker to play left sound channel audio and control the second sound channel loudspeaker to play right sound channel audio, so that independent output of the left sound channel and the right sound channel can be realized, and sound field playback of the electronic equipment has good stereoscopic impression.

Water closet with a bowl (1) and a rinsing water supply (5, 6) which ends in an inlet opening (7) into the bowl, wherein the bowl's inner shape (1) has a first vertical mid-plane (M1), wherein the vertical mid-plane (M1) is, in ordinary installation in front of a straight wall, perpendicular to this mounting wall and, in the installed state of the toilet, conceptually divides a water drain and a user sitting on the toilet in the middle, i.e., is perpendicular to a second vertical mid-plane (M2) which divides the toilet into a front and a rear area, wherein a purely top-side supply of rinsing water into the bowl is provided, i.e. without an inlet opening below a third horizontal median plane (M3) of the bowl shape with respect to its total height including the siphon, i.e. a median plane (M3) running horizontally and otherwise through the center of the entire vertical extent of the bowl's inner shape including the siphon, and exactly one inlet opening (7) is provided above the third median plane (M3) of the bowl's inner shape, wherein the rinsing water supply (5, 6) and the inlet opening (7) are designed such that the rinsing water flows into the bowl (1) with a predominantly tangential velocity component with respect to the bowl's inner shape and undergoes a rotating motion in the bowl (1), wherein the bowl's inner shape has no rim, i.e. no circumferential channel for rinsing water with downward-facing inlet openings for the flow of rinsing water into the bowl (1), characterized by that the bowl's internal shape (1) has an asymmetrical form with respect to the first vertical median plane (M1), even apart from any flushing water inlet openings, such that the bowl's internal shape defines a flow path for the flushing water between an outer concave edge (8) and an inner convex edge (9), with respect to vertical sections through the bowl's internal shape to the center of a water level (WS) in a siphon of the bowl (1), which flow path is continuous with respect to the vertical sections and is inclined relatively shallowly inwards in relation to the rest of the bowl's internal shape and thereby descends monotonically around the water level (WS) and is thus lower on one side of the median plane (M1) than on the other and thus superimposes a bowl-shaped downward movement on the rotating flushing water movement,The bowl's inner shape also adds a downward vertical movement component. and by the fact that the water closet has a static siphon (2).

A cable stripping device comprises a rack, a lifting frame installed on the rack in an up-down sliding mode, a first height adjusting structure installed between the rack and the lifting frame, an upper rotating shaft rotationally installed on the lifting frame, an upper V-shaped groove wheel fixedly installed on the upper rotating shaft, and a lower rotating shaft rotationally installed on the rack and located below the lifting frame. An upper V-shaped groove wheel is fixedly installed on the upper rotating shaft, a lower V-shaped groove wheel is fixedly installed on the lower rotating shaft, the upper V-shaped groove wheel and the lower V-shaped groove wheel are arranged in an up-down opposite mode, a cutter is installed on the portion, located on the front side of the lifting frame, of the rack in an up-down sliding mode, the cutter is located on the vertical split face of the upper V-shaped groove wheel and the lower V-shaped groove wheel, and a second height adjusting structure is installed between the rack and the cutter. The cable stripping device can be used for stripping cables with different diameters and different insulation skin thicknesses, and is wide in application range.

The invention discloses a rapid registration method and a registration positioning device for aircraft assembly, and the method comprises the steps: building a three-dimensional stl model of an aircraft part, and taking a crossed rib on a frame beam of the aircraft part as a virtual-real matching feature point; a plane equation R11 and a plane equation RR2 of the two ribs are obtained respectively, and then a middle plane equation RMid1 and a middle plane equation RMid2 of the two ribs are obtained; and combining the plane equations RMid1 and RMid2 with the top plane equation RTop, and calculating to obtain a plane intersection point as a theoretical registration coordinate point F (x, y, z). And finally, according to the thickness of the real object registration point device, adjusting the offset to obtain an aircraft assembly registration point Final (x + s * a, y + s * b and z + s * c) so as to carry out registration assembly. The method solves the problems that in the prior art, the theoretical coordinates of the registration points cannot be rapidly obtained, the real object registration points are not accurate enough to place, and the adaptability is not high, and has good practicability.

The invention discloses a coplanar origami honeycomb structure which is formed by in-plane and / or out-of-plane mirror images of basic origami units, and each basic origami unit is formed by splicing four folding subunits; each folding subunit comprises an upper plane, a lower plane, two middle planes and five inclined planes; the five inclined planes are two first inclined planes for connecting the upper plane and the two middle planes, two second inclined planes for connecting the lower plane and the two middle planes, and a third inclined plane for connecting the two first inclined planes and the two second inclined planes; the four folding subunits are spliced at the upper plane position to form an upper platform, and the four folding subunits are spliced at the middle plane position to form four middle platforms. An upper coplanar platform area and a lower coplanar platform area which are formed after a paper folding structure is folded are fully utilized, face-to-face connection between all layers of structures is achieved, the assembling complexity is reduced, the connection strength is improved, meanwhile, geometric parameters can be flexibly set and optimized according to specific application requirements in the initial design stage, and the design efficiency is improved. And the method has good engineering adaptability and application flexibility.

Cleaning device (40) for filters (32, 34) of filtering devices (10, 110) for a plastic material in the molten state, comprising a rotary main body (42) provided with scraping elements (48, 50) that cooperate with the filtering surfaces (32A, 34A) of two filters (32, 34) facing each other. On the two opposite sides (44, 46) of said main body (42) there are channels (60A, 60B, 60C, 70A, 70B, 70C) suited to receive the impurities collected by said scraping elements (48, 50) and to convey them into a discharge chamber (68), towards which they converge tangentially, and wherein the discharge openings (66) of said channels are made on a side of said discharge chamber (68) and arranged on the middle plane (M) of the main body (42).

The application discloses a method and system for converting an S3D structural model into a surface model in Ansys, which comprises the following steps: firstly, identifying the floor and wall items in the S3D three-dimensional design model; secondly, extracting the middle surface of the items; thirdly, extending the middle surface to form a closed space and extracting the corresponding space coordinate information; and finally, automatically forming an intermediate file which can be imported into Ansys to form an Ansys analysis and calculation model, thereby eliminating the need for a designer to manually create a middle surface model by observing the specific floor and wall arrangement in the design model, greatly improving the work efficiency, and further improving the quality of related work by eliminating the human error caused by manual secondary modeling.

The invention belongs to the technical field of aircrafts, and provides an aircraft morphing nose cone based on a compliant deformation structure, the aircraft morphing nose cone comprises a cone head, a deformation structure and a non-deformation cabin section, the cone head is installed on a movable platform in the deformation structure, a static platform in the deformation structure is installed at the tail end of the non-deformation cabin section, and the cone head is driven by the deformation structure to move in the non-deformation cabin section. The motion of single-degree-of-freedom telescoping and two-degree-of-freedom bending can be achieved, and the movable platform and the static platform are symmetrically distributed about the middle plane, so that the outer surface of the deformation structure can keep a continuous and smooth appearance. The large-range controllable deformation of single-degree-of-freedom stretching and two-degree-of-freedom bending can be achieved, it is ensured that in the deformation process, under the condition that the outer skin is restrained by the framework mechanism and supported by the elastic supporting body, the continuous and smooth aerodynamic shape is maintained, and the aerodynamic performance and adaptability of the aircraft in different flight states are effectively improved.

The invention provides a defect overhauling method, device and equipment for mechanical component simulation design and a medium, and the method comprises the following steps: inputting one or more initial design files of a mechanical component into a first simulation environment, and combining the initial design files into a to-be-overhauled design file; identifying each initial structural plane contained in the to-be-overhauled design file, identifying that the initial structural planes with incompleteness are collected as a first structural plane set, and identifying that the initial structural planes without incompleteness are collected as a second structural plane set; repairing the initial structural surfaces in the first structural surface set to correspondingly obtain a repaired third structural surface set; replacing the first structural plane set with a third structural plane set, and merging with the second structural plane set to correspondingly obtain a repair design file; and outputting the repair design file from the first simulation environment. According to the scheme, the defects in the mid-plane model can be automatically detected and repaired, manual processing is replaced, the watertight mid-plane model with the correct topology is generated, the repairing efficiency can be remarkably improved, and meanwhile the grid quality of finite element simulation pretreatment can be improved.

The embodiment of the application provides a one-piece magnetic driving bidirectional intramedullary nail, and belongs to the technical field of orthopedic implant medical instruments. The bidirectional intramedullary nail comprises a sleeve, a one-piece pipe section with a through hole; a telescopic unit composed of a magnetic driving part, a speed reduction part, an extension part and a bushing which are sequentially connected in the sleeve, and the telescopic unit comprises a first telescopic unit and a second telescopic unit which are symmetrically arranged in the sleeve along the axial direction of the middle plane; a limiting part arranged on the inner wall of the sleeve, at least three limiting parts are arranged on the first telescopic unit and the second telescopic unit respectively, and the limiting parts are used for limiting the positions of the magnetic driving part, the speed reduction part and the extension part in the axial direction; the part of the bushing in the sleeve limits the position of the extension part in the circumferential direction through a key groove structure, and the part of the bushing outside the sleeve is fixedly arranged together with the end part of the sleeve to form a terminal limiting part. The bidirectional intramedullary nail can realize bidirectional extension or contraction of two ends under variable load to complete various bone reconstruction processes.

The invention discloses a method and a system for extracting geometric middle surfaces of a sheet metal shell structure based on a fuzzy search face and a medium, and relates to computer-aided charting and data processing, and the method comprises the following steps: extracting area parameters of each surface of a geometric model; determining an effective point closest to the geometric center of the to-be-paired surface on the to-be-paired surface; taking the effective point as a starting point, and taking intersecting surfaces in bounding boxes of the rays and all surfaces of the target geometric model as candidate surfaces; calculating the shortest distance to the candidate surface; for candidate surfaces satisfying the distance range, extracting a normal vector of the candidate surface where the intersection point is located; calculating an included angle between the normal vector and the normal vector of the to-be-matched surface, selecting the candidate surface with the maximum included angle as a matched surface of the to-be-matched surface, and taking the calculated shortest distance as the thickness of the matched surface; offsetting according to the calculated thickness of the matching surface; and splicing the offset surfaces. The problems that the face feature size of a plate shell geometric model is small, matching faces are difficult to recognize, and matching face pain points cannot be formed due to face feature mismatching are solved.

A drawer pull-out guide includes a carcass rail to be fixed to a furniture carcass, an extension rail movably supported relative to the carcass rail, and a fastening device for releasably fixing a drawer to the extension rail. The fastening device includes an entrainment member with an engagement portion to be immersed in a drawer recess. The engagement portion is arranged on a fastening limb undetachably fixed to the extension rail. The engagement portion, the connecting portion, and the fastening limb have an integral one-piece configuration, and the engagement portion includes a bearing surface bearing against an inner wall of the recess. The engagement portion has a middle plane parallel to a longitudinal direction of the extension rail, with the connecting portion in the middle plane. The bearing surface has a larger width, in a transverse direction to the extension rail, than a material thickness of the fastening limb.

The invention provides a geometry pretreatment method and device, equipment, a storage medium and a program product. Relates to the technical field of automatic modeling. The method comprises the steps of obtaining a cleaning model corresponding to a to-be-recognized model; performing mid-plane extraction processing on a target part in the cleaning model to obtain a mid-plane model corresponding to the target part, the mid-plane model including a plurality of mid-planes of the target part; performing imprinting processing on two mid-planes of which the mid-plane distance is smaller than a preset distance in the mid-plane model to obtain an imprinted mid-plane model; based on the cleaning model, performing surface extension processing and / or surface movement processing on each mid-surface in the impressed mid-surface model to obtain a target mid-surface model; according to the grid division strategy, grid division is carried out on the target mid-plane model, and boundary conditions and load parameters of grids are set to obtain a pre-processing model; according to the method and the device, the effect of improving the modeling efficiency and the simulation capability is achieved.