1784 results about "Contact plane" patented technology

This optical connector comprises: a plurality of optical fibers; a ferrule having a plurality of fiber holes through which the plurality of optical fibers are inserted, two positioning holes, and a connection end surface in which the plurality of fiber holes and the two positioning holes are opened; and a housing for holding the ferrule. The connection end surface is inclined with respect to a virtual plane perpendicular to a longitudinal direction of the plurality of fiber holes when viewed from a juxtaposing direction in which the two positioning holes are arranged. The housing has a housing-side contact surface, and the ferrule has a ferrule-side contact surface that limits the amount of protrusion of the ferrule from the housing by coming into contact with the housing-side contact surface. In a state in which the housing-side contact surface and the ferrule-side contact surface are in contact with each other, the ferrule is swingable about a swing center axis with respect to the housing. The swing center axis is located at a position at which the housing-side contact surface and the ferrule-side contact surface are in contact with each other, and extends in an orthogonal direction that is orthogonal to both the longitudinal direction and the juxtaposing direction.

The invention relates to the technical field of construction and the technical field of software, and discloses a fabricated structure evaluation method and device based on a toughness value and carbon emission, and the method comprises the steps: adding the damage volumes of all interfaces, and obtaining the damage amount of a fabricated structure; when the damage amount of the fabricated structure is within the damage range, a repair scheme of the fabricated structure is obtained, and the carbon emission amount of the repair scheme is generated; according to the length of each interface, the inertia moment of the complete part of each interface, the moving distance of the neutral axis of each interface and the contact surface rigidity model, the contact surface rigidity of the fabricated structure is generated, and according to the contact surface rigidity of the fabricated structure, the material elasticity modulus of the fabricated structure and the toughness model, the toughness value of the fabricated structure is generated. And performing specific value calculation on the carbon emission of the repair scheme and the toughness value of the fabricated structure to generate an evaluation value of the repair scheme. According to the invention, the evaluation efficiency of the repair scheme of the fabricated structure can be improved.

The invention discloses a method for measuring the interface contact force of a bolt joint, which comprises the following steps of: establishing a relational expression between the contact surface area of a bolt and a base material and the interface contact force of the bolt joint according to different bolt thread types, and associating the interface contact force of the bolt joint with electric contact to construct a bolt thread force-electric contact model; the interface contact force of the bolt joint can be calculated through easily obtained physical parameters, so that the contact force distribution of the connecting piece can be quickly and effectively analyzed and measured, and meanwhile, the use condition of the connecting piece is evaluated.

The invention discloses a preparation method of a 3D printing multi-scale layered rigid-flexible impact-resistant composite material. The method comprises the following steps: designing a PLA skeleton with a multi-scale layered structure, and carrying out slicing processing to obtain an STL format file; the preparation method comprises the following steps: preparing a PLA framework through 3D printing, injecting a silicon elastomer serving as a soft material and a binder into a multi-stage layered structure of the framework, and curing to obtain the composite material. The composite material has a layered structure with three scales, the structure is realized by designing a patterned microstructure for each layer to induce a 3D printing path to stack layer by layer, and complex programming is not needed; the silicic acid gel in the gaps of each stage of layered structure is integrally formed, the composite material has the rigid-flexible coupling property, the hard PLA framework enables the composite material to have good mechanical properties, and the soft silicic acid gel provides larger deformation in the impact resisting process to achieve energy dissipation; tooth-shaped protruding interface structures which are embedded in a staggered mode are designed on the contact faces between the macroscopic layers, and the deflection direction of cracks is induced.

The invention discloses a nested self-adaptive adjustment loading device and method for sheet glass tensile strength testing, and belongs to the technical field of glass tensile strength tests.The device comprises an upper mounting mechanism and a lower mounting mechanism, the upper mounting mechanism and the lower mounting mechanism are connected through a sliding assembly, and the sliding assembly comprises parallel linear guide rails; the lower end of the parallel linear guide rail is fixed on the lower mounting mechanism, and the upper end is slidably connected with the upper mounting mechanism. According to the nested self-adaptive adjustment loading device and method for testing the tensile strength of the sheet glass, the design of double sliding rails is adopted, the upper clamp slides on the two parallel linear guide rails, left-right and in-plane relative displacement is further limited, the silica gel gaskets are adopted to prevent the glass from being in direct contact with the clamp, and the clamping efficiency is improved. When the contact surface of the clamp and glass is not smooth and possibly has stress concentration, the low-modulus silica gel gasket can provide a chance of self-adaption to the side surface of a groove of the clamp for a glass sample, and is suitable for different types of sheet-shaped glass samples.

The invention relates to the field of dies, in particular to a front oxygen sensor support stamping die structure which comprises a fixed die and a movable die, and a punching mechanism, a bending mechanism, a rim charge cutting mechanism and a discharging mechanism are sequentially arranged between the fixed die and the movable die in the conveying direction of a material belt. The punching mechanism is used for punching various holes in different shapes and positions in a material belt, the rim charge cutting mechanism is used for accurately cutting off rim charges, the bending mechanism is used for gradually bending the material belt of a plane structure into the shape of a product, and the discharging mechanism is used for conveying the machined product out of a die. The wear rate of the contact surface of the mold is reduced.

Stop device (1) for a conveyor system (40) where objects (43) are conveyed on a conveyor (41), where the stop device (1) comprises a housing (2), an actuator element (3) having a stop surface (12), and an electric motor (4) operably connected to the actuator element (3) such that the electric motor (4) can control the position of the actuator element (3), where the stop device comprises a stop position (20) in which the stop device (1) will hold an object (43) in a fixed position by the stop surface (12), and a bypass position (22) in which the stop surface (12) is positioned outside of a contact plane (42; 96) of the object (43) such that the object (43) can pass the stop device (1), where the actuator element (3) is provided with a braking surface (13), where the stop device (1) comprises a braking position (21) in which the braking surface (13) is positioned in the contact plane (42; 96) such that the object (43) will bear against the braking surface (13) and such that the speed of an object (43) will slow down from a first speed to a standstill, and where the electric motor (4) can move the actuator element (3) between the stop position (20), the braking position (21) and the bypass position (22). The advantage of the invention is that a reliable and cost-effective stop device comprising a brake function for an object such as a product or a pallet conveyed in a conveyor system is provided. The application also includes a conveyor system comprising a stop device.

An electrostatic chuck (ESC) pedestal heater that includes a pedestal body and a surface on the pedestal body for receiving a substrate such as a high bow wafer. An electrode is embedded in the pedestal body to selectively generate an electrostatic force. The ESC pedestal heater includes a substrate contact surface that is raised to a height above the surface on the pedestal body and includes an inner seal band, an intermediate seal band, and an outer seal band extending. In the substrate contact surface, main spokes are provided that extend outward from the inner seal band to the outer seal band, and ancillary spokes may be provided between the main spokes in the region between the intermediate and outer seal bands. Additionally, contact areas or dots are provided in the substrate contact surface in the spaces between the bands and spokes.

The invention discloses a clamp for stretching of a testing machine, and relates to the technical field of material stretching testing. According to the technical scheme, the device is characterized by comprising two clamping blocks which are mounted in a jaw of a testing machine and are used for clamping a sample; main anti-skid teeth and auxiliary anti-skid teeth are respectively arranged on the clamping surfaces of the clamping blocks; the tooth tops of the main anti-skid teeth are provided with biting tips, the tooth tops of the auxiliary anti-skid teeth are provided with anti-skid contact planes, and the tooth height of the main anti-skid teeth is larger than that of the auxiliary anti-skid teeth. Compared with the mode that only one kind of anti-skid teeth is arranged on the clamping face, the main anti-skid teeth and the auxiliary anti-skid teeth which are different in tooth height are combined, the main anti-skid teeth are used for biting a sample, the auxiliary anti-skid teeth are used for increasing friction force, and therefore the maximum stress borne by the main anti-skid teeth can be reduced while the biting depth of the main anti-skid teeth is increased; therefore, the anti-slip teeth can be prevented from being broken and slipping, the service life is prolonged, and the anti-slip teeth can be suitable for tensile testing of a sample with the tensile strength of 1250-2200 MPa.

The utility model relates to the technical field of floor production, in particular to a calender. The calender comprises a conveying mechanism and multiple sets of thickness determining mechanisms, the multiple sets of thickness determining mechanisms are arranged side by side at intervals, and the conveying mechanism is arranged between every two adjacent sets of thickness determining mechanisms. Due to the fact that the thickness setting distances in the multiple sets of thickness setting mechanisms arranged from the near end to the far end of the extruder are gradually reduced, stress deformation of a base material is reduced through multi-section calendering setting of the multiple sets of thickness setting mechanisms, and product forming stability is improved. The contact surfaces of the lower rollers in the plurality of groups of thickness determining mechanisms and the base material and the conveying surface of the conveying mechanism are on the same plane, so that the PET / PETG base material is not subjected to bending stress and can be stably calendered and molded, the requirement of high straightness required by production of the base material such as the PET / PETG can be met, the production qualification rate of the base material such as the PET / PETG is further improved, and the production cost of the base material such as the PET / PETG is reduced. The production efficiency of PET / PETG (polyethylene terephthalate / polyethylene terephthalate glycol) base materials is further improved through the calender suitable for the PET / PETG calender.

To provide a masking material capable of stably depositing a metal film on a surface of a substrate using the surface of the substrate as a cathode.SOLUTION: A masking material 60 is for depositing, by electrolytic plating, a metal film F of a prescribed pattern P on a surface of a substrate B with a metal layer Ba formed. The masking material 60 includes: a mask part 65 having a penetration part 68 in accordance with a predetermined pattern P; and a metal mesh 67 being a conductive member to have contact with the metal layer Ba. The mask part 65 includes an elastic material. The mask part 65 includes a metal mesh 67 embedded therein so as to expose a part of the metal mesh 67 from a contact face 65a to have contact with the metal layer Ba in a surface of the mask part 65.SELECTED DRAWING: Figure 5

The invention relates to the technical field of construction material testing, and provides a tunnel construction material waterproof performance testing device which comprises a freezing and thawing test box, a machine box and a rack, a pressurized water injection system and a sealing slotting mechanism are arranged in the rack side by side, and the pressurized water injection system comprises a jack and a water pressure system; the jack is used for detecting the bearing load strength of the material test block, and the water pressure system is used for pressurizing water and detecting the waterproof performance of the material test block under high load. The tunnel construction material waterproof performance testing device integrates pressure resistance, erosion resistance, freezing resistance and waterproof performance detection tests on construction materials, can simulate the overall state of the construction materials in different tunnel environments to perform waterproof performance tests, so that the construction materials are added according to different tunnel requirements to improve the waterproof performance, and meanwhile, through the arrangement of the sealing slotting mechanism, the waterproof performance of the tunnel construction material is improved. The contact surface of the material test block and the water pressure system can be subjected to sealing waterproof treatment, and water is prevented from overflowing from the contact surface during water seepage detection.

The invention relates to the technical field of building construction, in particular to a large-span steel truss structure welding tool and a construction method.The large-span steel truss structure welding tool comprises a sleeving frame, the sleeving frame is installed at the to-be-welded splicing position of a first steel truss girder and a second steel truss girder, the sleeving frame comprises two sets of buckle plates, each set of buckle plates comprises two buckle plates, and the two buckle plates are connected through a connecting angle plate; connecting plates are integrally formed at the two ends of the buckle plates, the two connecting plates on the same side of the two sets of buckle plates are connected through the connecting buckle plates in an inserted mode, inserting blocks are connected to the surfaces of the connecting buckle plates in an inserted mode, and one ends of the inserting blocks are connected to the surfaces of the connecting buckle plates in an inserted mode; the large-span steel truss structure welding tool and the construction method have the beneficial effects that the sleeving frame comprises the two sets of buckle plates, and the buckle plates in each set are connected through the connecting angle plates and can be conveniently buckled to the to-be-welded splicing positions of the first steel truss girder and the second steel truss girder. Due to the design of the connecting angle plate, the transition angle plate and the limiting angle plate, the contact area between the buckle plate and the steel truss girder is increased, and the fixing stability is improved.

The invention discloses a machining device and a machining method of a plug-in retainer. A machining positioning device comprises a mandrel, a lower die and an upper die, wherein the lower die and the upper die are arranged on the mandrel; the lower die is provided with an outer circumferential surface for supporting the inner circumferential surface of the semi-finished retainer and a first abutting plane for supporting the non-notch side end surface of the semi-finished retainer, the outer circumferential surface is perpendicular to the first abutting plane, and pocket avoiding grooves in one-to-one correspondence with the positions, where pockets need to be machined, of the semi-finished retainer are formed in the outer circumferential surface in the circumferential direction of the outer circumferential surface; the upper die is provided with an axial extending part which is located on the outer side of the outer circumferential face and is in sliding fit with the outer circumferential face, and the end of the axial extending part is provided with a second abutting plane which is parallel and opposite to the first abutting plane and used for pressing the end face of the notch side of the semi-finished retainer. The retainer is installed in a machining center through the machining device, pocket hole drilling and milling and notch milling are completed in the same step, the precision of the notch is improved in the machining process in cooperation with a machining method, and the quality of a finished retainer product is guaranteed.

The utility model discloses a connecting assembly for a composite floor and the composite floor, and belongs to the technical field of floors. The connecting assembly comprises a foaming base plate, the density of the foaming base plate is 0.65-1.4 g / cm < 3 >, the foaming base plate is provided with two opposite target faces and side faces formed around the target faces, and a connecting part interlocked with the adjacent base plate is formed on at least one side face; a surface texture is formed on at least one target surface, the surface texture comprises a plurality of micro geometrical shapes formed by small spacing and peak valleys, and the micro geometrical shapes can provide a bonding surface for a bonding agent for bonding the covering part. According to the surface texture, the roughness of the target surface is effectively improved, the contact area between the binding agent and the binding surface can be increased, and the binding agent can bind the covering part and the foaming base plate with high strength and is not prone to falling off.

The utility model provides a glass mold which comprises a bottom mold with a cavity and a secondary mold which is arranged on the side face of the bottom mold and is provided with an uneven structure, and the secondary mold penetrates through the bottom mold from the cavity to the outer side of the side face of the bottom mold. The end, close to the cavity, of the secondary mold and the cavity jointly form a cavity used for containing molten glass, the uneven structure of the secondary mold is arranged in the cavity, and the end, located on the outer side of the side face of the bottom mold, of the secondary mold is provided with a first fixing block used for fixing the secondary mold; the secondary mold can slide relative to the first fixing block, a jacking support used for vertically jacking the bottom mold upwards is arranged at the bottom of the bottom mold, and the contact face of the first fixing block and the secondary mold is obliquely arranged relative to the moving direction of the jacking support. When the jacking support jacks the bottom die upwards, the secondary die can move towards the outer side of the bottom die, so that the secondary die is separated from formed glass, and interference of the secondary die on the formed glass is avoided.

The invention relates to a double-contact floating board-to-board connector in the field of connectors, which comprises a fixed seat and a floating seat arranged in the fixed seat, an accommodating cavity for inserting the floating seat is formed in the fixed seat, the floating seat is inserted in the accommodating cavity, a butt joint groove for butt joint is formed in the middle of the floating seat, and the butt joint groove is formed in the middle of the floating seat. The floating seat is connected with a floating terminal in an inserting manner, the floating seat is provided with a groove structure for inserting the floating terminal in a paired manner, and the floating terminal is sequentially provided with a contact part, an inserting part, an elastic part, a limiting part and a terminal welding part in a bending manner. According to the utility model, the assembling convenience of the floating terminal and the floating deformable area are further enhanced, the stability and reliability of connection are ensured, good contact is ensured through the double contact planes of the contact part, and the problems of poor contact, installation and the like in a traditional connector are effectively solved.

The invention discloses a method for judging whether seepage phase change and leakage occur in multi-scale static seal, which comprises the following steps of: 1, acquiring positive pressure sigma under the working condition of a static seal product by utilizing a force sensor or a finite element simulation method; step 2, obtaining height distribution of the contact surface of the static sealing product by using a high-precision microscope, and obtaining characteristic parameters; 3, according to the contact basic equation, solving the relation between the contact area and the positive pressure and the generalized diffusion variance; 4, for a certain specific analysis scale, giving a leakage critical characteristic line L of a corresponding critical contact area ratio; 5, in a characteristic state plane, namely a roughness hRMS-fractal index H plane, according to the relative position of the characteristic parameters and the leakage critical characteristic line L, whether leakage occurs or not is judged; the problem that a traditional sealing performance evaluation method depends on an empirical threshold and cannot quantitatively represent multi-scale contact characteristics and seepage phase change critical conditions is solved.

The invention discloses a rolled U-shaped crimping terminal and a preparation process thereof, and the preparation process comprises the following steps: selecting a continuous metal sheet of copper or copper alloy for cutting, carrying out fine rolling processing on a strip-shaped blank at a contact section position of the terminal, and forming two side cambered surfaces K at the contact section of the terminal by controlling process parameters in the fine rolling process, the foremost end of the contact section is subjected to cut-off face chamfering machining, a U-shaped cut-off face is formed, and the angle of the cut-off face is controlled to be smaller than 90 degrees so that inward inclination can be achieved; a leading-in area and a thinning transition area are formed between a contact section and a connection section of a terminal through processing, surface treatment and surface quality detection are performed on the terminal, a low-roughness contact surface is realized through a fine rolling technology, and the thickness of a crimping area 110, the diameter of a needle tip and angle parameters of each key area are accurately controlled, so that damage to a PCB coating is effectively reduced, and the service life of the PCB is prolonged. And the stability and the reliability of the connection between the terminal and the PCB are obviously improved.

The utility model provides a key switch and a keyboard, and belongs to the technical field of electronic equipment. The key switch provided by the utility model comprises a shell, and a stroke assembly and a signal assembly which are accommodated in the shell, the stroke assembly comprises a shaft core, a shaft grid which is connected with the shaft core and is separated from the shaft core, and an elastic piece which is accommodated in the shell and enables the shaft core and the shaft grid to be in a normal contact state, and the contact surface of the shaft core and the shaft grid is an arc-shaped surface; the signal assembly comprises a trigger part and an induction part, the trigger part is installed on the shaft grid, the shaft core drives the shaft grid to move and drives the trigger part to move in the direction close to the induction part, and when the distance between the trigger part and the induction part reaches a preset threshold value, an induction signal is triggered. In order to solve the problem that in the prior art, the contact surface of the shaft core and the shaft grid is a plane, and the shaft grid can be driven to tilt when the shaft core tilts laterally, the contact surface of the shaft core and the shaft grid is adjusted to be the arc-shaped surface, the shaft grid cannot be driven to tilt when the shaft core tilts laterally, jamming caused by friction between the shaft grid and the lead column is avoided, and use experience is improved.

The invention discloses a contact resistance-based method for synchronously measuring normal force and shear force of an interface, which comprises the following steps of: inspired by a yield criterion of material damage, establishing a relationship between normal stress and shear stress of the contact interface, thereby obtaining a relationship between a real contact area of the contact interface and the normal force and the shear force; obtaining the relationship between the contact resistance of the contact interface and the real contact area, and establishing the relationship between the contact resistance of the interface and the normal force and the shear force; according to the geometric deformation relation of the micro-convex bodies on the contact interface before and after the shearing force acts, the relation between the real contact area of the contact interface and the geometric deformation parameters of the micro-convex bodies is obtained, and the relation among the normal force of the contact interface, the shearing force and the geometric deformation parameters of the micro-convex bodies is obtained; and establishing a simultaneous equation set, measuring the contact resistance, and substituting the contact resistance into the equation set to calculate the normal force and the shear force. According to the invention, the normal force and shear force of the interface can be indirectly measured by measuring the contact resistance of the contact interface.

The utility model discloses an overhanging type end plate lap step steel structure column, which increases the connection contact area with a steel column and a steel beam through the structural design on the premise of not influencing the universality and the adaptability of a steel column connection node, and solves the problems caused by too small contact area. An upper end plate of the end plate lap joint unit is vertically arranged on the upper side of the transverse lap joint column, the upper side of the upper end plate is higher than the upper side of the column flange plate, and a plurality of third connecting holes are formed in the upper end plate. The lower end plate is vertically arranged at the end, away from the connecting joint body, of the transverse lap joint column, the upper side of the lower end plate is flush with the upper side of the transverse lap joint column, the lower side of the lower end plate is lower than the lower side of the transverse lap joint column, and a plurality of first connecting holes in the same direction as the third connecting holes are formed in the lower end plate. The utility model can be widely applied to the field of fabricated buildings.

The application provides a self-adaptive eccentricity compensation and sensitivity enhancement type pressure ring sensor and a loading and unloading measurement model construction method thereof.The sensor comprises an upper force transmission unit, a lower force transmission unit and a measurement elastic body unit.The sensor adopts a spherical surface contact structure design, can automatically adjust and compensate the load eccentricity caused by the uneven contact between the contact planes, and reduces the influence of the eccentricity on the measurement results.The established sensor loading and unloading measurement model can accurately monitor the bolt fastening force in real time.The deformation of the measurement elastic body unit of the sensor is measured by using a fiber grating, and the sensor has the advantages of high precision and good reliability.In addition, the pressure measurement result of the sensor is irrelevant to the friction coefficient of the contact surface between the sensor and the nut and the structure, and the measurement precision of the sensor in actual application is further improved.The self-adaptive eccentricity compensation and sensitivity enhancement type pressure ring sensor has the advantages of small size, large range, high precision, automatic correction, good reliability and the like.

The utility model discloses a device for enhancing adhesive force between glue and a plane material, which comprises a base, an ultrasonic generator mounted in the middle of the lower end of a top cover, and a transmission cavity formed in the base, and a double-thread transmission rod is rotationally arranged in the transmission cavity, moving blocks are in threaded connection with the two sides of the exterior of the double-thread transmission rod, one ends of the moving blocks extend to the exterior of the transmission cavity, connecting plates are arranged on the two sides of the lower portion of the top cover, and the connecting plates are welded and fixed to the ends, located outside the transmission cavity, of the moving blocks. According to the device for enhancing the adhesive force between the glue and the plane material, the glue can better permeate into tiny gaps and surface pits of the plane material by starting the ultrasonic generator, vibration energy of ultrasonic waves can promote glue molecules to more actively move and diffuse on the surface of the plane material, the contact area between the glue and the plane material is increased, and the adhesive force is enhanced.

The invention provides a self-adaptive eccentric compensation sensitization type pressure ring sensor and a loading and unloading measurement model construction method thereof. The sensor comprises an upper force transmission unit, a lower force transmission unit and a measuring elastomer unit. The sensor adopts the structural design of spherical contact, load eccentricity caused by uneven contact between contact planes can be automatically adjusted and compensated, and the influence of eccentricity on a measurement result is reduced. The built sensor loading and unloading measurement model can accurately monitor the bolt fastening force in real time. The sensor measures the deformation of the elastomer unit by adopting the fiber bragg grating, and has the advantages of high precision and good reliability. In addition, the pressure measurement result of the sensor is irrelevant to the friction coefficient of the contact surface between the sensor and the nut and the structure, and the measurement precision of the sensor in practical application is further improved. The self-adaptive eccentric compensation sensibilization type pressure ring sensor has the advantages of being small in size, large in measuring range, high in precision, capable of automatically correcting deviation, good in reliability and the like.

The invention relates to the technical field of desiccant packaging equipment, and discloses a desiccant packaging supply film forming device which comprises a packaging forming device and a regulation and control conveying mechanism installed on the packaging forming device. Comprising a first rotating shaft fixedly connected with the packaging forming device and a first friction roller fixed to the first rotating shaft. Each of the two second friction assemblies comprises a second friction roller mounted on the first rotating shaft; the moving assembly is used for controlling the two second friction rollers to move; the heat dissipation assembly works in cooperation with the moving assembly and is used for enabling two second friction rollers to move in opposite directions through the moving assembly according to the friction coefficient needed by the packaging film and the material of the packaging film, and the contact area between the two second friction rollers and the packaging film is changed; for a smooth PE film, the contact area is reduced, and the friction force is reduced; for rough composite aluminum films, the contact area is increased, the friction force is improved, film material slipping or tensile deformation is avoided, and the film supply stability is ensured.

The invention belongs to the technical field of computers, and provides a face gear pair meshing contact area analysis method which comprises the following steps: inputting design parameters of a face gear pair; three-dimensional coordinates of N contact points corresponding to N preset corners in the meshing process of the face gear tooth surface in the face gear pair are obtained, and the long semi-axis distance of a contact ellipse expanded by each contact point is obtained; mapping the N contact points to a two-dimensional plane one by one to obtain N mapping points; recording an interval between adjacent mapping points on a horizontal axis of the two-dimensional plane, obtaining N-1 intervals, and constructing a mark edge curve function of each interval; obtaining a meshing contact area based on the print edge curve functions of the N-1 intervals; and outputting the meshing contact area. The invention also provides a device for analyzing the meshing contact area of the face gear pair, a computer program product and electronic equipment. The calculation efficiency is improved on the premise of ensuring the precision of the meshing contact area.

The utility model discloses a rotary adjusting type track lamp structure which comprises a lamp body and an electricity taking box structure, and the electricity taking box structure comprises a shell, a first contact piece, a second contact piece, a first Z-shaped contact piece, a second Z-shaped contact piece, a rotary gear, a rotary supporting column and a connecting contact piece. The top of the first contact extends out of the top surface of the shell and the side edge of the first contact protrudes out of the side surface of the shell; the connecting contact piece is located on the bottom face of the rotating gear, and a conductive column is arranged on the rotating gear. The top plate ends of the first Z-shaped contact piece and the second Z-shaped contact piece extend out of the upper portion of the side wall of the rotary supporting column, a clamping protrusion is arranged in the middle of the outer wall of the rotary supporting column, and a folding cavity shaped like a Chinese character'feng 'is formed in the shell. According to the utility model, the structure arrangement is reasonable, the contact area with the conductive column or the second contact sheet can be adjusted, the contact area with the conductive sheet in the track groove can be adjusted, the stability and the reliability of installation are improved, the disassembly, the assembly and the maintenance operation are convenient, the effectiveness of power taking can be ensured, the applicability is strong, and the practicability is good.