51 results about "Flexural torsional" patented technology

The invention relates to the technical field of wires and cables, in particular to a flexible anti-torsion control cable and a preparation method thereof.The cable comprises a cable core, a shielding layer and an outer sheath, and the shielding layer comprises a braid layer and a plurality of elastic pieces evenly distributed around the periphery of the inner sheath; any two adjacent elastic pieces are woven in the woven layer at equal intervals, so that the woven layer has radial and circumferential activity amounts at the elastic pieces, the elastic pieces are woven in the woven layer, the elastic pieces can enable the woven layer to have large deformation amount, and the shielding coverage area cannot be reduced. When the braid layer is in a bending or torsion working condition, the elastic piece is compressed and deformed, and the part releases stress, so that the bending and torsion resistance of the braid layer can be improved, and the service life of the braid layer is prolonged.

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 relates to an experimental device and method for testing the comprehensive mechanical property of a slender flexible cable, and belongs to the technical field of ocean engineering testing. The device comprises a main body frame, a tensile loading device, a bending load loading device and a torsional load loading device. The tensile loading device is not directly connected with the main body frame and is directly connected with the end part of the cable during an experiment. Through a modular integrated design, multi-axis coupling cooperative loading of stretching, bending and twisting is realized; a stretching actuator provides axial tension; the four-point bending actuator drives the slide rail and the roller to realize dynamic bending, and the bending radius is adjustable; the torsion actuator converts linear motion into torque through a gear-rack mechanism, and the supporting rollers eliminate axial interference. The device has the functions of pressure self-adaptive control and energy recovery. The device solves the problem that a traditional testing machine cannot simulate complex ocean working conditions, and is suitable for comprehensive mechanical property evaluation of flexible pipe cables such as submarine cables.

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 ultra-high-speed magnetic suspension, and discloses a liquid helium storage device suitable for an ultra-high-speed magnetic suspension superconducting magnet. The device comprises a box body, a runway-shaped upper cover plate, a support lug piece, a cavity, a pipe connector and a bottom cover plate, the box body is arranged in a preset hole in the runway-shaped upper cover plate and used for providing an installation space for electronic components in the superconducting coil and storing liquid helium, and the cavity comprises a runway-shaped bottom surface and a side wall conforming to the runway-shaped bottom surface; the supporting lug pieces are arranged on the outer surfaces of the side walls and used for transmitting electromagnetic force, the pipe connectors are arranged on the outer surfaces of the side walls and used for providing connectors for liquid helium injection and helium discharge, the runway type framework wound with the superconducting coil is arranged in the cavity, the runway type upper cover plate is connected with the runway type framework, and the bottom cover plate is connected with the runway type bottom face. The liquid helium storage device not only can ensure that liquid helium with a certain volume is stored and soaks the coil, but also can assist in supporting the coil, provide supporting rigidity and avoid quenching caused by bending and torsional deformation.

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.

The utility model discloses a novel cable bending torsion testing machine which comprises a first platform. A torsion mechanism and a bending mechanism are arranged at the upper end of the platform I; the torsion mechanism comprises a servo motor speed reducer and a chain wheel transmission mechanism; the bending mechanism comprises a platform II; a plurality of screw rod sliding table modules are arranged on the platform II; the lead screw sliding table module comprises a sliding table base and a lead screw assembly. An outer side bending wheel is arranged on the sliding table seat; a middle moving platform is arranged on the platform II; the middle moving platform is connected with the second platform through a sliding rail and sliding seat mechanism. The second platform is provided with a positive and negative tooth lead screw assembly. A left inner side bending wheel and a right inner side bending wheel are arranged on the positive and negative tooth screw rod assembly; the first platform is further provided with a front end moving platform assembly. One side of the front-end moving platform assembly is connected with the counterweight mechanism; a main driving motor is arranged at the bottom of the first platform. The device can accurately and quantitatively measure bending and torsion resistance data of different cables under a fixed test condition before cable cores are broken, so that the product quality is improved.

The present invention relates to the design, optimization and application of a reinforcement or reinforcements produced by additive manufacturing to increase the bending, torsional and load-bearing stiffness of sheet metal components.

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 utility model relates to the technical field of constructional engineering, and provides a portable steel bar rapid bending and twisting tool, which comprises an operating platform, a hand-operated device, a fixing device and a bending and twisting device, the hand-operated device comprises a steel pipe, the operating platform adopts a rectangular steel plate structure, the length of the operating platform is 30cm, the width of the operating platform is 20cm, and the fixing device is arranged on the operating platform. The thickness of the operation platform is 1 cm, the bending torsion device is welded to a steel pipe of the manual device through an M16 bolt, and a bolt sleeve is installed on the M16 bolt. According to the utility model, after the equipment is taken to the site, the reinforcing steel bar is inserted on the ground, the fixation of the equipment in the operation process is ensured, the stability and safety of the operation are improved, and the equipment is portable, easy to carry and install, capable of reducing the labor intensity of working personnel, and suitable for different site working environments; and the practicability and the application range of the tool are further improved.

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 relates to the technical field of offshore oil engineering facilities, in particular to a connecting joint for an FPSO upper module and a connecting method of the connecting joint. The connecting joint comprises cross beams and longitudinal beams which are perpendicularly and fixedly arranged in a staggered mode, stand columns are fixedly connected to the tops of the cross beams, and leg columns are fixedly connected to the bottoms of the cross beams; inclined struts are fixedly connected to the vertical planes of the cross beams, the longitudinal beams and the stand columns, supporting parts are fixedly arranged at the bottoms of the inclined struts, the cross beam webs and the longitudinal beam webs are connected through the fixing plates, a stable triangular structure is formed among the cross beam webs, the longitudinal beams and the fixing plates, external loads and deformation can be effectively resisted, and therefore the overall stability of the whole upper module is enhanced; the cross beam and the longitudinal beam are effectively prevented from bending, twisting and other deformation when stressed, the integrity and stability of the structure are ensured, the limiting block is arranged at one end of the inclined strut insertion plate to increase the contact area with the stand column, the supporting part arranged in a sliding mode can flexibly conduct position adjustment on the cross beam or the longitudinal beam, and fine adjustment is conducted according to the actual stress condition of the inclined strut.

The invention relates to a vehicle body frame structure and a vehicle, the vehicle body frame structure comprises a side wall front section, a side wall rear section and a top frame, and the top frame comprises a middle beam structure; the side wall front section is connected to the front side of the side wall rear section, and the middle beam structure is connected to the upper side of the side wall front section and the upper side of the side wall rear section so that a frame opening structure suitable for assembling a gull-wing door can be formed among the side wall front section, the side wall rear section and the middle beam structure. The side wall rear section comprises a rear side wall outer plate, a rear side wall inner plate and a rear side wall reinforcing structure connected between the rear side wall outer plate and the rear side wall inner plate, and the rear side wall reinforcing structure extends along the rear side edge of the frame opening structure. The rear side wall reinforcing structure comprises a D column upper reinforcing plate, a rear side wall reinforcing plate and a doorsill reinforcing plate rear section which are continuously connected from top to bottom. The vehicle body frame structure and the rear side wall reinforcing structure penetrate from top to bottom and surround the gull-wing door to form a reinforcing beam, and the bending and torsional rigidity of the frame opening structure can be enhanced.

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 discloses a middle longitudinal beam, a frame and a vehicle, the middle longitudinal beam comprises a first beam body used for being connected with a front longitudinal beam and a rear longitudinal beam of the frame, and the lower end of the first beam body is provided with a first connecting surface used for being connected with a battery pack bolt; the second beam body comprises a main body part, a first extension part and a second extension part, the main body part is connected with the Y-direction outer side of the first beam body, the first extension part is arranged on the upper side of the main body part, the upper end of the first extension part is provided with a second connecting face used for being connected with a floor bolt of a vehicle body, and the second extension part is arranged on the side, away from the first beam body, of the main body part; a third connecting surface in bolted connection with a doorsill beam of the automobile body is arranged at the upper end; the first beam body and the second beam body are integrally formed by aluminum materials. The first beam body is fixedly connected with the battery pack, and the second beam body is fixedly connected with the vehicle body, so that the vehicle body, the frame and the battery pack are directly connected, the bending torsional rigidity of the whole vehicle is improved, the aluminum profile is light, and the lightweight design of the whole vehicle is met.

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 invention belongs to the field of structural strength tests, and particularly relates to a composite material T-shaped rib bending torsion coupling loading test device. The testing device comprises a testing machine chuck fixed end, a bending clamp supporting end assembly, a T-shaped rib test piece, a bending clamp loading end assembly, a testing machine chuck movable end and a torsion clamp assembly. Through structural design, simulation of a failure mechanism and a load transfer mechanism of the T-shaped rib test piece is realized, independent loading of a bending load applied to the T-shaped rib test piece can be realized, and meanwhile, a bending load and torsion load coupling loading technology is broken through; the composite material T-shaped rib test piece bending load and torsion load coupling loading device can realize bending load and torsion load coupling loading of a composite material T-shaped rib test piece, can realize loading of different bending / torsion load ratios, is reliable in test result, and ensures the accuracy of load application.