31 results about "Flexural torsional" patented technology

The invention discloses a special cable for a complex environment and a preparation method of the special cable. The special cable comprises a cable core, a composite protection layer, an armor layer and an outer coating layer, the composite protective layer comprises an inner sheath layer, a middle reinforcing layer and an outer sheath layer; the armor layer is formed by wrapping a metal belt, the inner side of the armor layer is provided with a continuous bulge structure, and the continuous bulge structure is embedded with the spiral grooves in the surface of the outer sheath layer to form mechanical interlocking, so that displacement and looseness of the armor layer are effectively prevented; the reinforcing core body is embedded in the groove in the outer side of the metal belt, and the reinforcing core body and the metal belt are fixed through the spring piece, so that reinforcing buffering is formed, the anti-fatigue and anti-impact performance is remarkably improved, and the cable is suitable for complex working conditions of dynamic bending, torsion and frequent vibration, such as ocean cables, trailing cables and robot cables. The device has the advantages of being stable in structure, high in fatigue resistance and long in service life. The preparation method comprises the steps of spiral groove processing, metal belt pre-forming, reinforcing core inlaying, spring piece fixing, wrapping and armoring and the like, the process is reliable, and the method is suitable for large-scale production.

The invention discloses an anti-distortion and anti-compression cable for an oil platform. The anti-distortion and anti-compression cable is suitable for signal or power transmission in a high-corrosion, high-humidity and high-mechanical-disturbance environment. The cable comprises a plurality of strands of silver-plated copper stranded wire core bodies, a micro-foaming silica gel anti-fatigue buffer layer is arranged outside the silver-plated copper stranded wire core bodies, a movable sleeve layer structure is sleeved outside the silver-plated copper stranded wire core bodies, the movable sleeve layer is composed of a low-friction coating, a sliding main sleeve layer and a rigid shape limiting shell layer, the core wires are allowed to slide freely and be sleeved and positioned when bent and twisted, and structural fatigue and dislocation are prevented. The cable filling body is composed of a high-density supporting framework and a flame-retardant silica gel rope, and an anti-torsion fiber braid layer, a metal shielding layer and a multifunctional sheath layer of a sandwich structure are arranged outside the cable filling body. The cable has the advantages of torsion resistance, compression resistance, self-adaptive structure, self-healing protection and excellent shielding performance, adapts to extreme platform working conditions, improves the system reliability and prolongs the service life.

The invention relates to the technical field of industrial robot cables, and particularly discloses a bending-resistant industrial robot cable and a preparation method thereof. The cable comprises an elastic limiting piece, a cable core wire, a signal wire, a torsion springback layer, a shielding layer and a sheath layer. The elastic limiting piece is in a cross shape and located in the center of the cable, four cable core wires are arranged at the position of a cross-shaped groove, and four signal wires are arranged at the position of a cross-shaped edge. The outer side of the cable core wire is provided with a torsion springback layer; a tensile filling rope is arranged between the torsion springback layer and the elastic limiting piece; a flexible filling layer is arranged on the outer side of the torsion springback layer; and a shielding layer and a sheath layer are sequentially arranged on the outer side of the flexible filling layer. The high-modulus and high-resilience elastic limiting piece and the torsion resilience layer are designed in the cable to cooperatively assist the cable in timely returning during torsion and bending, so that the overall stress of the cable is uniform, permanent deformation caused by continuous accumulation of stress during bending and torsion of the cable is avoided, and the bending and torsion life of the cable is greatly prolonged.

The invention provides a reprogrammable pneumatic soft deformation actuator and a preparation method thereof, and relates to the technical field of soft robot deformation. Comprising a body made of a flexible material, at least one sealed air gap is formed in the body, an air channel is formed in the body, and the air gap is communicated with the air channel; and an outer incision is arranged outside the body around the air passage. The whole body of the device is made of soft materials such as silica gel, reprogramming of a soft actuator structure can be achieved through manufacturing and bonding of new and old air gaps or outer notches, and a new deformation mode is obtained. The structure is a full-soft structure, can keep the flexibility of a soft deformation structure, and has the advantages of safety in contact with a human body or a fragile object and impact resistance. Through reciprocal operation of cutting and bonding, geometric parameters or distribution modes of air gaps and outer notches can be changed, and different deformation modes such as elongation, bending, torsion and composite deformation can be obtained.

The invention discloses planing equipment for stainless steel profile machining, and belongs to the technical field of metal cutting machine tools. Comprising a positioning unit and a planing unit, a limiting vertical cylinder and a contact mechanism form a rotating-guiding closed loop, the rotating-guiding closed loop pushes a profile through friction force, the planing unit conducts synchronous guiding through four-point clamping, the power loss is extremely small, the stainless steel profile is always internally supported by the limiting vertical cylinder and externally clamped by a guiding clamping rod from entering a positioning frame to planing is completed, and secondary clamping is not needed; the guide clamping rod is of an elastic floating structure, bending, torsion or dimensional deviation of the profile can be automatically compensated within the range of 0-3 mm, and the material blocking rate is reduced to be lt during mixed flow production of the same batch and different specifications; double-reference positioning is formed by four-point outer clamping and inner supporting, the perpendicularity of the planed end face and the axis can be stably controlled within 0.05 mm, the roughness Ra of the end face is smaller than or equal to 1.6 m, and the rejection rate is reduced by about 50%; shock excitation energy is dispersed through multi-point contact and transmitted to the frame through the bottom mounting piece, and the noise of the whole machine is reduced by 6-8 dB (A); meanwhile, resonance is inhibited.

According to the technical scheme, the combined curtain track is characterized in that the combined curtain track comprises a track body provided with a clamping part and a guide rail connector, and the outer side edge of the guide rail connector extends downwards to form a clamping edge matched with the track body; a first protrusion extending transversely and a second protrusion extending obliquely downwards are symmetrically arranged on the side wall of the track body, and the length of the first protrusion is larger than that of the second protrusion. And a first groove and a second groove which are respectively matched with the outer contours of the first lug boss and the second lug boss are formed in the clamping edge outside the track main body. The rigidity of the track body is improved through the arrangement of the first protrusions, and bending, twisting and deformation caused by stress of the track are reduced; the clamping edges can generate reverse torque through friction force and mechanical limiting to offset external torsional moment. The first groove and the second groove are connected and matched with the first protrusion and the second protrusion, stress concentration is avoided, and the service life of the track body is prolonged.

The utility model discloses a high -efficient automatic box -turning conveying device for condiment, include: the box -turning conveying frame, the box -turning conveying frame end portion is equipped with five places angle difference and forms the L type box -turning support of the automatic box -turning action of box in conveying in proper order from left to right, the round steel guide rail turnover part of automatic overturning action of box conveying stroke track between every L type box -turning support, through the coordinated design of double guide round steel bending torsion track and five -stage gradient L type box -turning support (15 degree 75 degree), realized full -automatic gradual box -turning. With physical track guide instead of mechanical arm forced overturning, eliminate the defect of traditional device angle single, rely on artificial regulation, adapt to different box specifications and filling capacity, gradual center of gravity deviation design avoids material leakage, in combination with the guidance restraint of double guide rail, make overturning action coherent accurate, significantly improve production continuity.

Stress assisted machining method for the machining of workpieces (4), for example slender, or thin-floored or thin-walled workpieces (4), based on the application of a controlled stress state to the workpiece (4) during machining. The method comprises the steps of placing (20) a workpiece (4) in a machining machine; applying (30) a stress state to the workpiece (4), the stress state being selected from tensile, compression, bending, torsion and a combination of two or more of them; performing (40) a machining operation while maintaining the stress state on the workpiece (4) and releasing (50) the applied stress state from the workpiece (4).

The application discloses a middle longitudinal beam, a vehicle frame and a vehicle. The middle longitudinal beam comprises a first beam body configured to be connected with front and rear longitudinal beams of the vehicle frame, and a lower end of the first beam body is provided with a first connecting surface configured to be bolted with a battery pack. The middle longitudinal beam further comprises a second beam body comprising a main body part, a first extension part and a second extension part. The main body part is connected with an outer side of the first beam body in the Y direction. The first extension part is arranged on an upper side of the main body part and is provided with a second connecting surface at an upper end thereof, the second connecting surface being configured to be bolted with a floor of a vehicle body. The second extension part is arranged on a side of the main body part away from the first beam body and is provided with a third connecting surface at an upper end thereof, the third connecting surface being configured to be bolted with a rocker beam of the vehicle body. The first beam body and the second beam body are integrally formed of aluminum material. The first beam body is fixedly connected with the battery pack, and the second beam body is fixedly connected with the vehicle body. The three are directly connected, the bending and torsional stiffness of the whole vehicle is improved, the aluminum material is light in weight, and the light weight design of the whole vehicle is met.

The invention provides a cable bending and torsion composite mechanical life test method and test equipment, and relates to the technical field of cable aging test, and the method comprises the steps: applying a periodic bending load and a torsion load to a to-be-tested cable, setting a target loading path, collecting test data in real time, and determining an execution state; whether the bending load and the torsion load meet the consistency requirement or not is judged, when it is judged that the bending load and the torsion load do not meet the consistency requirement, the current bending load applying process and / or the current torsion load applying process are / is adjusted, and the service life cycle number of the cable reckoned in the current service life test cycle is determined; and the mechanical life of the cable under the action of the bending torsion combined load is obtained. According to the invention, the technical problems of loading path deviation, damage accumulation distortion and inaccurate service life evaluation result caused by asynchronous bending and torsion load application in an actual composite loading test are solved, and the consistency of a composite fatigue loading path and the reliability of a test conclusion are ensured.

The utility model relates to the field of cables, and provides a bending-torsion-resistant high-flexibility drag chain cable. The utility model aims to solve the problems of short service life and poor safety caused by conductor breakage, insulating layer abrasion and sheath layering of the traditional drag chain cable under the working conditions of frequent bending and torsion, and adopts the main scheme that the drag chain cable comprises a superfine stranded conductor (1) which is formed by multiple copper wires with the wire diameter range of 0.08-0.15 mm in a compound stranding manner; the thermoplastic rubber insulating layer (2) is coated outside the superfine twisted conductor (1); the colloid filling layer (3) is filled among the plurality of insulated conductors; and the integral thermoplastic rubber outer sheath (4) is coated outside the colloid filling layer (3), the thickness of the integral thermoplastic rubber outer sheath (4) is 1.2-2.0 mm, and no layered interface exists between the outer sheath (4) and the insulating layer (2).

This invention discloses a rear strut assembly structure, a vehicle, and its design method. It includes a rear strut inner plate fixed to the outer rear wheel arch panel and a rear wheel arch inner plate reinforcing plate fixed to the inner rear wheel arch panel. A rear strut support plate, a rear strut corner plate, a rear strut upper reinforcing plate, and a roof rear crossbeam lower plate are fixed to the inner rear strut panel. The rear strut support plate is arranged at an acute angle, and the rear strut support plate and the rear strut corner plate are fixedly connected by a rear strut connecting plate. The rear strut upper reinforcing plate is fixed to the rear strut support plate, and the two are arranged at an obtuse angle. The roof rear crossbeam lower plate and the rear strut inner plate are fixed, and the roof rear crossbeam lower plate and the rear strut upper reinforcing plate are arranged at an obtuse angle. The rear strut corner plate has a quadrilateral cross-sectional shape. The outer rear wheel arch panel and the rear strut support plate overlap in the Y direction. The rear wheel arch inner plate reinforcing plate, the rear strut support plate, and the roof rear crossbeam lower plate are arranged in a C-shape. This invention can improve the bending and torsional rigidity of the body-in-white during the project development stage.

The invention discloses a laminated welding spot bending torsion combined stress optimization method based on a genetic algorithm, and the method comprises the following steps: designing a corresponding combination based on a Box-Behnken test, and building a bending torsion combined stress mathematical model of a laminated welding spot through IBM SPSS; optimizing the structural parameters of the laminated welding spots on the stress mathematical model by using a genetic algorithm; according to the method, the structural parameters of the laminated welding spots are better, and the bending torsion combined stress of the laminated welding spots can be reduced through the obtained parameters.

The invention provides a quaternion discrete rod dynamics modeling method for overhead line toughness evaluation, and belongs to the technical field of power systems, the method comprises the following steps: using a three-dimensional catenary equation to simulate and calculate a static equilibrium curve of a wire under the action of self weight, and completing initial shape finding of the wire; dispersing the lead into rod sections with mass, rotational inertia and quaternion attitude parameters, and constructing a discrete rod model containing geometric and physical attributes; calculating translation and rotation kinetic energy of the conductor section, introducing gravitational potential energy and elastic potential energy, representing energy dissipation through a damping function, and forming a Lagrange function element; introducing external load simulation, and solving attributes of the overhead line in various aspects under the action of an external environment; the node position and the rod section attitude quaternion are used as generalized coordinates, a kinetic equation containing constraints is established in combination with the Lagrange-Arrange principle, and solution is carried out through numerical integration. According to the invention, the translation, bending and torsion coupling characteristics of the lead are accurately depicted, and high precision and high efficiency are both considered.

The invention belongs to the technical field of stacking machine gantry production, and particularly relates to a welding assembly system and method for a stacking machine gantry frame structure. The automatic welding device is mainly composed of a controller, a stiffening beam adsorption assembly, a connecting component clamping assembly, an axial anti-disengaging piece pushing assembly, a stand column pipe fitting pushing assembly, a screw hitting mechanical arm, an outer linear seam welding assembly, an outer annular seam welding assembly and an inner annular seam welding assembly. The automatic welding and assembling of the portal frame structure of the stacking machine can be realized; according to the stacking machine portal frame structure assembled in a welded mode, the circumferential torsion resistance between the adjacent stand column pipe fittings is improved through the connecting components, the axial anti-disengaging performance between the connecting components and the stand column pipe fittings is improved through the axial anti-disengaging parts, and the stand column pipe fittings arranged side by side on the two sides serve as sliding rail parts for linear sliding of a follow-up movable portal. After multiple sections are spliced, complex bending and torsion combined stress can be borne, and the reliability meets the requirement of a high-strength working condition.

The utility model relates to the technical field of cables, in particular to a flame-retardant fireproof cable for rail transit, which comprises a cable core, a shielding layer, a composite flame-retardant layer and an outer sheath, a pinning layer capable of increasing the tensile strength of the composite flame-retardant layer is arranged between every two adjacent outer flame-retardant layers, and each pinning layer is formed by weaving a plurality of tensile fiber ropes in a staggered mode, so that weaving gaps capable of increasing the adhesive force between the outer flame-retardant layers and the pinning layers are formed in the pinning layers; the composite flame-retardant layer composed of the outer flame-retardant layer and the containing layer is arranged, the weaving gap formed by the containing layer is utilized, the adhesive force between the outer flame-retardant layer and the containing layer is increased, when the cable is bent, twisted and deformed, the fluidity of the outer flame-retardant layer when the outer flame-retardant layer is extruded is reduced, and the thickness consistency of the outer flame-retardant layer is maintained; and local thinning of the outer flame-retardant layer caused by bending, deformation and extrusion of the cable is avoided.

The application relates to the technical field of testing devices, and discloses an insulator mechanical testing tool for nuclear fusion, a testing platform and a method, which comprise a center rod, one end of the center rod is arranged on a detection end of a testing machine, the other end of the center rod is connected with an insulator, an insulator positioning frame, the insulator positioning frame or the center rod is connected with a force applying end of the testing machine, and a connecting structure, which is a tensile and compressive performance testing connecting structure, a bending performance testing connecting structure or a torsional performance testing connecting structure, and the tensile and compressive performance testing connecting structure, the bending performance testing connecting structure and the torsional performance testing connecting structure can be replaced with each other. After one performance test is completed, the tool that has been subjected to the performance test can be removed, and other performance test tools are replaced, so that the insulator can be subjected to tensile, compressive, bending and torsional performance tests, the performance of the low-temperature insulator under various loads can be more comprehensively evaluated, and comprehensive detection of the insulator is realized.

This invention discloses a heat treatment device for induction-heated steel wire, belonging to the field of steel wire heat treatment technology. It includes a steel wire feeding device, a first guiding and pressing device, an induction heating worktable, an induction heating device, a second guiding and pressing device, a ball screw nut pair wire guide, a steel wire winding and collecting device, and a control device. This invention can effectively improve the strength of different series of steel wires, enhance the comprehensive performance of the steel wire such as bending, torsion, and elongation; it can also improve the wear resistance of the steel wire, greatly avoiding wire breakage during production. Furthermore, it avoids the use of molten lead in traditional steel wire heating processes, thus preventing environmental pollution and reducing the production cost of steel wire. The non-contact heating process eliminates sparks, protecting the steel wire surface; simultaneously, the high thermal efficiency of induction heating achieves energy savings.

The utility model provides a dash panel assembly and a vehicle, relates to the technical field of vehicle parts, including dash panel body and mounting piece, the mounting piece is arranged on one side of dash panel body, and the mounting piece is connected with the dash panel body, the mounting piece sinks towards one side far away from the dash panel body, and the dash panel body is connected with the dash panel body. The mounting piece and the dash panel body define a closed hollow beam structure, and the side, away from the dash panel body, of the mounting piece is used for mounting a heat management module. The mounting piece is arranged on one side of the dash panel body, and the mounting piece is connected with the dash panel body, so that the rigidity and the strength of the dash panel body are improved; meanwhile, the mounting piece is sunken in the direction away from the dash panel body so as to define a closed hollow beam structure with the dash panel body, and the closed hollow beam structure is high in bending and torsional deformation resistance, so that the rigidity and strength of the dash panel assembly are improved, and the mounting stability of the heat management module is ensured; the vibration noise of the heat management module in the automobile running process is reduced, and the NVH performance of the automobile is improved.

The invention relates to the technical field of frame fatigue strength test equipment, in particular to an electric forklift frame fatigue strength test device, and aims to solve the problem of large errors caused by function separation and incomplete working condition simulation of an existing device. The device comprises a base, a vertical supporting column and a transverse guide rail beam are arranged on the base, and a movable bending loading driving device is arranged on the beam; a front axle and a rear axle supporting seat are arranged in front of and behind the base, each supporting seat comprises a mounting cylinder seat, a transverse rotating shaft, a transition mounting plate and a fixing table with a positioning clamp, and the transverse rotating shaft of the rear axle supporting seat is connected with a torsion loading driving device; an elastic telescopic column is arranged between the fixed table and the mounting cylinder seat; and electromagnetic vibration modules are arranged on the transition mounting plate and the fixed table. According to the invention, bending simulation, torsional fatigue simulation and motor electromagnetic vibration simulation are integrated, the frame does not need to be disassembled and assembled for many times, the test efficiency and data credibility are improved, and the comprehensive fatigue test requirements of the frame of the electric forklift are met.

The application discloses a kind of anti-bending torsion cable and its production method, the cable includes reinforcing component, the reinforcing component includes support inner layer, support outer layer and adjusting piece, multiple reinforcing bars are arranged between the support inner layer and support outer side circumferentially, multiple adjusting grooves are equidistantly arranged outside the reinforcing bar, and reinforcing sheet is movably inserted in the adjusting groove.The reinforcing bar and multiple reinforcing sheets cooperate to form a complete support bar to support the cable, ensuring the mechanical strength of the cable and making it have strong anti-bending torsion performance.When the reinforcing sheet is away from the adjusting groove position, the cable can be bent through the adjusting groove position to complete winding or placement work, making the use of the cable more convenient.

The application discloses a method for improving the rigidity of a thin glass fiber reinforced epoxy resin composite plate, which comprises the following steps: laminating metal layers on both sides of a thin glass fiber reinforced epoxy composite layer, and arranging a continuous adhesive layer at the interface, so that the metal layers bear the external tension and pressure, the composite layer is arranged in the middle position to complete the connection and support, and the overall rigidity and deformation characteristics of the thin plate are improved under the premise that the plate thickness changes little. The structure is suitable for light and thin plate parts with limited space and high appearance requirements, so that the thin plate can maintain good shape stability under bending, torsion and other working conditions. Meanwhile, the metal layer with low surface activity is subjected to polishing, plasma or film plating pretreatment, and a machining protective film is attached after the pretreatment, and then contour machining, hole opening and chamfering and other steps are carried out. The process route is beneficial to stabilizing the laminated interface conditions, reducing the rework links, and providing a relatively consistent plate base for subsequent hot-pressing forming and assembly.

This invention relates to the field of thread milling technology, specifically to a high-precision thread milling device and its application in the production of furniture connectors. The device includes: a frame structure and two symmetrically arranged milling heads connected by a drive assembly; a pneumatic gripper mounted on the frame structure; multiple sets of clamping assemblies mounted on the frame structure, arranged vertically in space, and cooperating with the pneumatic gripper to fix the workpiece; a coaxial wheel assembly that is rolledly connected to clearance grooves on the clamping assemblies; and a follower connected to the drive assembly, cooperating with the coaxial wheel assembly to sequentially open and close the clamping assemblies as the milling head moves along the length of the workpiece. This prevents uneven stress or bending / torsion on the workpiece during milling, improving milling accuracy.

The utility model discloses a support connecting piece, a bonding assembly and a support. The support connecting piece is flexible, the support connecting piece is provided with a first surface and a second surface which are arranged oppositely, the second surface is used for being connected with an external platform, and a first groove is formed in the first surface. The first groove is formed in the support connecting piece, the material amount of the support connecting piece is reduced, when the whole support connecting piece deforms under stress, the material amount needing to move and deform is reduced, the support connecting piece is more prone to deformation such as bending and twisting, better flexibility is shown, and therefore when the support connecting piece is connected with an uneven platform, the support connecting piece is not prone to deformation. The support connecting piece can be bent and deformed, so that the support connecting piece can be well adhered to the external platform, namely, the support connecting piece can adapt to various types of external platforms.

The utility model relates to the technical field of torsion-resistant cables, and discloses a torsion-resistant cable for a robot pipeline package, which comprises an aramid fiber tensile filling layer, a conductor is arranged on the outer side of the aramid fiber tensile filling layer, a second rubber jacket is arranged on the outer side of the conductor, a sealing layer is arranged on the outer side of the aramid fiber tensile filling layer, and a second rubber jacket is arranged on the outer side of the sealing layer. According to the utility model, through the arrangement of the aramid fiber tensile filling layer, the winding braided shielding layer and the insulation protection layer, the torsion resistance of the cable is enhanced while the shielding performance of the cable is ensured, and the cable has the advantages of high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength, high tensile strength and the like. The insulation protection layer is made of TPEE materials, the tensile strength of the core wire is improved, the bending torsion service life of the core wire is prolonged, the situation that cracks appear on the surface of the conductor can be reduced, the service life of the conductor is prolonged, the conductor adopts a twisted-pair structure, and interference between signals can be effectively reduced.

The invention discloses a winding torsion test device for cable detection, and relates to the technical field of cable detection, the winding torsion test device comprises a base, the upper part of the base is provided with a torsion length adjusting member, the upper part of the other side of the base is provided with a side plate, and one side of the upper part of the side plate is rotatably provided with a second clamp. A gear motor is installed on the other side of the upper portion of the side plate, an output shaft of the gear motor is connected with the second clamp, and a torsion form test piece is arranged on the rear side of the side plate. According to the winding torsion test device for cable detection, during detection, a cable can be subjected to torsion detection under the horizontal condition and can also be subjected to torsion detection under the condition of bending of different degrees, torsion testing of the cable under the condition of different forms is achieved, and therefore the cable torsion detection effect is improved; and the twisted cable sheath can be polished, and the wear resistance of the twisted cable sheath can be tested, so that the quality condition of the cable can be better judged.

The invention belongs to the technical field of ocean engineering, and discloses a marine riser and a preparation method thereof, the marine riser comprises a lining layer, a structure enhancement layer and an external protection layer which are coaxially and tightly bonded in sequence from inside to outside; the structure reinforcing layer is formed by repeatedly overlapping and curing a plurality of basic paving layer units along the wall thickness direction of the pipe body; the spiral winding single-layer strips of the basic laying layer units are sequentially a single-layer positive spiral strip, a double-layer negative spiral strip, a single-layer positive spiral strip, a single-layer negative spiral strip, a double-layer positive spiral strip and a single-layer negative spiral strip from inside to outside. The spiral winding angles of the spiral winding single-layer strips are consistent, and the spiral winding angles of the positive spiral strips and the negative spiral strips are opposite in direction. The in-plane coupling term sum in the in-plane stiffness matrix [A] of the basic laying layer unit, the bending-torsion coupling term sum in the bending stiffness matrix [D] and the coupling stiffness matrix [B] are 0, and complete decoupling of structural mechanical response is achieved.

The invention discloses a flexible anti-torsion cable for an industrial robot and a preparation method of the flexible anti-torsion cable. The flexible anti-torsion cable comprises a filling core, a cable core, filling strips, a wrapping layer, a shielding layer, a belting layer and an outer sheath. The shielding layer comprises an inner shielding layer and a composite shielding layer which are sequentially arranged from inside to outside, the composite shielding layer comprises a semi-conductive film belt layer, an elastic layer and a heat bonding layer, a woven shielding net is embedded in the heat bonding layer, and conductive particles are dispersed in the elastic layer and the heat bonding layer. The shielding layer adopts a mode of combining the inner shielding layer and the composite shielding layer, the elastic layer provides a buffer deformation space during bending and torsion, mechanical stress is absorbed, and the stress is prevented from being directly transmitted to the woven shielding net and the inner shielding layer; the conductive particles dispersed in the elastic layer and the thermal bonding layer establish multi-path electrical connection between the inner and outer shielding layers, so that the torsional fatigue resistance life and the shielding continuity of the shielding layers are improved.

The utility model relates to a vehicle body and a vehicle, the vehicle body comprises a supporting piece, a back plate lower cross beam, a B column lower inner plate, a girder assembly and a safety belt mounting plate, the safety belt mounting plate is fixed to the back plate lower cross beam, and the B column lower inner plate is welded to the safety belt mounting plate and the back plate lower cross beam to define a first cavity. In the first direction, one side of the supporting piece is welded to the back plate lower cross beam, and the other side of the supporting piece is welded to the girder assembly, so that the back plate lower cross beam is supported on the girder assembly. The vehicle body is provided with the supporting piece and the first cavity, the structural stability and rigidity of the rear back plate lower cross beam can be improved, the risk of deformation of the rear back plate lower cross beam can be reduced, the structural strength and deformation resistance of a cross beam lower connector area can be improved, and therefore the structural stability and bending torsion resistance of the vehicle body can be improved; the safety of the vehicle body is improved.

A photoelectric composite reel flat cable disclosed by the present application comprises a wear-resistant outer sheath and a filling layer located in the wear-resistant outer sheath, the wear-resistant outer sheath adopts a butyronityile sheath, the cross section of the filling layer is of a flat structure, and an optical cable unit, a ground wire, a plurality of power lines and a plurality of tensile members which are distributed in a row are arranged in the filling layer. The optical cable unit comprises an inner sheath, and a plurality of optical cable cores and a plurality of filling ropes are arranged in the inner sheath. According to the cable, the flat structure design is adopted, the cable is suitable for the working environment where abrasion is prone to occurring, and long-term stable operation of the cable is guaranteed. And the elastomer is adopted for insulation, and the flexibility is good, so that the cable can still keep the structural integrity and the functional stability under complex deformation such as bending and torsion.