162results about How to "Reduce rebound" patented technology

The invention provides a negative electrode binder, a negative plate and a secondary battery in order to solve the problems of low peeling strength and low cycle life of a coating of an existing negative electrode binder. The negative electrode binder comprises a copolymer, and the copolymer comprises an acrylate unit, a vinyl aromatic unit, an acrylamide unit, an acrylate-polyol unit and a crosslinking unit. According to the negative electrode binder provided by the invention, the negative electrode active material layer has relatively high binding power, low pole piece rebound and relatively small full-charge rebound, so that the long cycle life of the battery is ensured.

The invention relates to the field of batteries, and discloses electrode slurry, a preparation method thereof, an electrode plate, a battery and an electric device. The electrode slurry comprises an electrode active material, a conductive agent, a binder, a plasticizer and a solvent, the binder comprises CMC (Carboxymethyl Cellulose), SBR (Styrene Butadiene Rubber) and a water-based binder, the water-based binder is an acrylic copolymer binder, and the SBR is a styrene, butadiene and acrylonitrile copolymer binder. The CMC, the SBR and the specific water-based copolymer binder are combined and applied to the electrode slurry, through matching with other components such as an active material and the like, the processing performance of the electrode slurry can be remarkably improved, for example, smooth sieving of the slurry, improvement of binding power, reduction of pole piece rebound and the like can be achieved, and meanwhile compared with slurry adopting a commercial binder, the service life of the electrode slurry is prolonged, and the service life of the electrode slurry is prolonged. And the long cycle performance of the battery can be improved, and the requirement of a high-performance battery can be further met.

The invention discloses cold pressing and slitting integrated equipment, and relates to the technical field of battery pole piece manufacturing equipment. An unwinding mechanism is arranged at the upper end of the workbench, a pole piece roll is arranged on the unwinding mechanism, a rebound lowering mechanism is arranged on the right side of the unwinding mechanism, a cold pressing mechanism is arranged on the right side of the rebound lowering mechanism, and a slitting mechanism is arranged on the right side of the cold pressing mechanism. The device integrates a plurality of functions of an unwinding mechanism, a rebound reducing mechanism, a cold pressing mechanism, a slitting mechanism and the like, so that the integration level and the production efficiency of a production line are remarkably improved, material transfer and manual intervention among equipment are reduced, and the production cost is reduced; the electric heating pipes are used for heating the side walls of the first pre-pressing cylinder and the second pre-pressing cylinder, and preheating is carried out while the pole piece is rolled, so that the forming stress of the pole piece is released, the wrinkle rate of the rolled pole piece is reduced, and the rebound is effectively reduced; polishing can be conducted through the front polishing piece and the rear polishing piece, operation is safer, and meanwhile the flatness of the section of the pole piece is guaranteed.

The invention provides a U-shaped von Karman variable curvature curve profile frame roll bending forming process. The U-shaped von Karman variable curvature curve profile frame roll bending forming process comprises the following steps that S1, hard material roll bending forming is adopted for raw materials of a U-shaped frame; s2, the blanking size of the U-shaped frame is limited; s3, performing segmentation processing on the U-shaped frame curve by adopting a radius fitting method; s4, roll bending is conducted on the U-shaped frame, and the arc length compensation of each section is prolonged; and S5, different reduction values are added to the radius of each section of each pass of roll bending of the U-shaped frame, and the von Karman curve U-shaped frame is obtained. The von Karman curve variable curvature U-shaped frame has the beneficial effects that a hard material roll bending forming process is adopted to replace a stretch bending forming process, the part forming precision can be improved, the production efficiency is improved, the quenching procedure in the stretch bending forming process is omitted, and the production cost is reduced.

The invention relates to the technical field of steel cord detection, in particular to a steel cord core strand extraction force detection device which comprises a tension spring filled with a tension cylinder and connected to the lower end, and further comprises two thread end fixing mechanisms which are symmetrically arranged up and down, and the thread end fixing mechanism located on the upper portion is connected with one end of the tension spring; a sliding plate is slidably connected to the inner side of the tension cylinder, an upper pull rod extending to the outer side of the tension cylinder is fixed to the upper end of the sliding plate, and a plurality of through holes are formed in the edge of the sliding plate. According to the invention, through a plurality of push rods with different lengths in the thrust mechanism, when the rack moves downwards by the stroke of one triangular tooth, more locking teeth are engaged with the same triangular tooth in sequence, so that more push rods play a locking role on the rack; therefore, the one-way locking effect can be kept when the rack moves downwards by a smaller stroke, the springback distance of the upper pull rod and the sliding plate is further reduced, and the detection accuracy is improved.

The invention relates to the technical field of road building materials, in particular to an early-strength low-resilience sprayed concrete material and a preparation method thereof. The preparation method comprises the following steps: preparing the modified accelerator; preparing a silicon dioxide nanowire; preparing a magnetic silicon dioxide nanowire; and preparing the early-strength low-resilience shotcrete material. Sodium alginate and sodium carboxymethyl cellulose are added in the preparation of the modified accelerator, the sodium alginate and the sodium carboxymethyl cellulose can cooperate with each other when being used together, a colloidal network formed by the sodium alginate can wrap and stabilize particles of a dispersed phase, and the particles of the dispersed phase can be dispersed by the sodium carboxymethyl cellulose through winding and interweaving of macromolecular chains of the sodium carboxymethyl cellulose. The viscosity and the stability of the dispersion system are further enhanced, so that the concrete material quickly forms a gel state, the resilience is reduced, and the concrete strength is improved.

The invention relates to the technical field of motor stator windings, and discloses a stator coil uniform winding method and a winding device thereof, and the method comprises the steps of material preparation, wire pre-stretching, wire correction, quality detection, equipment debugging, parameter setting, winding and painting treatment. Wherein the lead is pre-stretched in the lead pre-stretching stage, so that the situation that the compactness and the shape of the lead are affected due to the fact that the length of the lead is changed due to stress release and elastic force recovery after the lead is wound, and the performance of the winding is affected due to uneven winding is avoided; and meanwhile, through the wire winding device, the structure of a tensioning mechanism in the wire winding device is improved, so that the wire winding device can adapt to processing of the pre-stretched wire, and the situation that the wire is broken due to too large tension in the wire winding process and the winding work of the wire is affected is avoided.

The invention relates to the field of elevators, in particular to an elevator with a falling buffering function, which comprises an exoskeleton frame, an electric cabin door, pulleys and the like, an electric cabin door is mounted on the exoskeleton frame, and an acceleration sensor is arranged on the exoskeleton frame; the exoskeleton frame is provided with two pulleys. The high-strength exoskeleton frame is arranged and used for protecting the lift car from deformation when emergency falling happens, safety of passengers in the lift car is protected, the electromagnet and the annular permanent magnet are arranged between the lift car and the exoskeleton frame, falling of an elevator is buffered through the electromagnetic damping effect, and the safety of the elevator is improved. The situation that after the exoskeleton frame makes contact with the hydraulic buffering device, the exoskeleton frame rebounds, and consequently the lift car bounces up and down is reduced, stable stopping of the lift car is achieved, and the situation that the lift car bounces rapidly, and secondary damage is caused to passengers in the lift car is avoided.

The invention provides an electrorheological damping aircraft nose landing gear and an aircraft. The landing gear comprises a damping cylinder body; one end of the piston rod is slidably arranged in the damping cylinder, the other end of the piston rod is connected with an aircraft wheel, and a supporting shoulder is arranged in the middle of the piston rod; the electrorheological damping assembly comprises a plurality of electrorheological damping units which are stacked on the supporting shoulder; each electrorheological damping unit comprises electrorheological elastomers, a first electrode plate and a second electrode plate, and the adjacent electrorheological elastomers share one electrode plate; each first electrode plate is arranged on the inner wall of the damping cylinder body through a first insulating snap ring seat, and the end away from the snap ring seat is in sliding contact with the outer wall of the piston rod; each second electrode plate is arranged on the outer wall of the piston rod through a second insulating snap ring seat, and the end away from the snap ring seat is slidably contacted with the inner wall of the damping cylinder body; the power supply and the two electrodes are electrically connected with the piston rod and the damping cylinder body respectively to form a conductive loop; the rigidity can be adjusted in a self-adaptive mode, and the stability and comfort of aircraft operation are improved.

The utility model relates to pipeline detection technical field discloses a natural gas long -distance pipeline safety pressure testing device, including pressure testing detection box and water delivery pipe, the outside right side fixed connection of pressure testing detection box has the gas straight pipe, the inside fixed connection of gas straight pipe has sealing ring no.

The invention discloses high-compactness low-resilience shotcrete and a preparation method thereof, and relates to the field of shotcrete, the preparation method comprises the following steps: (1) respectively stacking a cementing material, a fine aggregate and a coarse aggregate by adopting an MAA model to obtain a design ratio of each internal raw material; and (2) fully mixing the cementing material, the fine aggregate, the coarse aggregate and the elasticity reducing agent which are obtained according to the design ratio in the step (1), adding water and a water reducing agent for mixing, and doping an accelerator in a manner of mixing with pressurized air to obtain the high-compactness low-resilience sprayed concrete. The early-strength elasticity reducing agent is adopted, pumpability of the sprayed concrete is improved, early hydration of the concrete is accelerated, under the combined action of the early-strength elasticity reducing agent and the alkali-free accelerator, the early mechanical property of the sprayed concrete is rapidly improved, and the construction efficiency of the sprayed concrete is improved. And by adopting multi-section close packing, close filling structures are respectively formed in the cementing material, the fine aggregate and the coarse aggregate, so that the plastic viscosity of the slurry and the compactness of the concrete are effectively improved.

The invention relates to the technical field of winding machines, in particular to a full-automatic winding machine capable of preventing wire breakage, which comprises a winding machine body and a bottom plate, the bottom plate is mounted at the end part of the winding machine body, a movable seat and a fixed seat are arranged at the end part of the bottom plate, a mold fixing cylinder is arranged in the movable seat, an outer sleeve is arranged in the fixed seat, and a wire inlet cylinder is inserted into the side wall of the fixed seat; a conveying wheel is arranged in the outer sleeve, and a first moving plate is arranged on the side wall of the fixing base. By arranging the tension detection sensor, the tension condition of the wire rod in the winding process is monitored, when the tension exceeds a preset safety range, the tension detection sensor can rapidly transmit a signal to the first servo motor, the first servo motor is started and adjusts the positions of the rotating ring and the adjusting ring, the conveying path and the tension state of the wire rod are changed, and the wire rod is conveyed. The problem of wire breakage caused by too high tension is reduced and avoided, the stability and reliability of wire winding are improved, production interruption and waste products caused by wire breakage are reduced, and the production efficiency is improved.

The utility model relates to a kind of rock breaking rods, it includes: including main body and hammer head, main body is covered with flexible layer outside, main body is equipped with movable cavity inside, movable cavity is arranged close to the bottom end of main body, several movable members are filled in movable cavity, and movable member can freely move in movable cavity. Hammer head is located below main body, and is connected with the bottom end of main body. Inertial motion of movable member can absorb and offset part of kinetic energy that bounces back to rock breaking rod, so as to significantly reduce rock breaking rod echo, improve rock breaking effect. Movable member shakes in movable cavity can significantly reduce the vibration of rock breaking rod and the intensity of high-frequency noise radiated outward, so as to be conducive to ecological environmental protection. Flexible layer covered outside main body buffers the vibration of main body, and reduces the noise propagated outward by main body. Therefore, the rock breaking rod can reduce the adverse effects of energy bouncing back to rock breaking rod.

The invention provides a correction jig, a correction method, a rotating shaft cover plate and foldable electronic equipment. The correction jig is used for correcting the straightness of a long-strip-shaped part and is provided with a first groove, and the first groove extends in the first direction; in the second direction, the range of the difference value w1-w1'between the width w1 of the first groove and the width w1 'of the long-strip-shaped part is larger than or equal to 0.05 mm and smaller than or equal to 0.1 mm, and the first direction intersects with the second direction. The correction jig is simple in structure.

The present invention provides a spray device, including a spray pipe assembly and a spray head, wherein the spray pipe assembly includes a plurality of arc-shaped spray pipes, and two adjacent arc-shaped spray pipes are adjustably connected through an adjustment mechanism to form an arc-shaped arch structure that matches the curvature of the tunnel; the spray head is provided with a plurality of pieces distributed on the arc-shaped arch structure, and the plurality of spray heads are distributed in a manner of increasing from the top of the arc-shaped arch structure to both sides. The present invention arranges the spray pipe assembly to be formed by connecting a plurality of arc-shaped spray pipes to each other, and arranges the spray pipe assembly in a manner of decreasing from the top to both sides, and arranges the spray heads in a manner of increasing from the top of the spray pipe assembly to both sides, so that the tunnel can be fully sprayed to achieve a comprehensive and effective maintenance effect, and the generation of a water curtain can be prevented.

The invention discloses a damping device for an industrial pipe gallery, and particularly relates to the technical field of pipe gallery damping, the damping device comprises a pipe gallery main body, a damping part and an energy storage part, the damping part comprises a plurality of damping blocks, and a first buffer cavity and a second buffer cavity are formed in each damping block; the damping block buffers vibration generated by the pipe gallery body through flowing of liquid in the first buffering cavity and the second buffering cavity, and excessive springback is prevented during buffering recovery. The energy storage part comprises energy storage pieces arranged at the two ends of the damping block correspondingly and an energy storage cavity formed in the side face of the damping block, and when the damping block buffers vibration, the energy storage pieces compress gas and transmit the gas to the energy storage cavity; liquid flows in the first buffering cavity and the second buffering cavity, so that damping force opposite to the vibration direction and the rebound direction of the fourth elastic piece is generated, vibration is rapidly buffered, meanwhile, the rebound amplitude of the fourth elastic piece is gradually reduced, and redundant vibration caused by excessive rebound of the fourth elastic piece is reduced; and the damping effect is improved.

The present application provides a negative electrode sheet for a secondary battery and a preparation method thereof, as well as a secondary battery, a battery module, a battery pack and an electric device comprising the negative electrode sheet. The negative electrode sheet of the present application includes a current collector and an active material layer coated on at least one surface of the current collector, the active material layer includes a first graphite layer, a lithium titanate layer and a second graphite layer, the first graphite layer is arranged on at least one surface of the current collector, the lithium titanate layer is arranged on the surface of the first graphite layer, the second graphite layer is arranged on the surface of the lithium titanate layer, and the OI value of the first graphite layer is greater than or equal to 20.0, and the OI value of the second graphite layer is less than or equal to 15.0.

The invention provides a negative poisson ratio metal honeycomb ultra-thin strip forming platform and a using method thereof. Comprising a positive poisson ratio honeycomb belt, a lower pressing plate, a supporting block, a first fixing block, a limiting block, a first guide column, a left sliding plate, a base, a first limiting plate, a first guide rail, a first sliding groove, a second sliding groove, a baffle, a second guide rail, a straight line handle, a third sliding groove, an upper pressing plate, a second limiting plate, a third guide rail, a fourth sliding groove, a rib plate, a connecting plate, a push plate, a fourth guide rail and a second fixing block. A second guide column, a right sliding plate, a forming sliding block, a bushing, a base plate, a positioning bolt and a trapezoidal block; by applying the technical scheme, the part quality can be improved. And meanwhile, a pressure maintaining system of the forming platform can effectively reduce springback of the part and improve the dimensional precision of the part.

The invention discloses an anti-scale sewage solid-liquid separation reaction device, and relates to the technical field of sewage treatment. The device comprises an accommodating shell, a first filter plate is mounted in the accommodating shell, the accommodating shell is divided into a filter chamber and a reaction chamber from top to bottom by the first filter plate, and the first filter plate is conical. During use, sewage is discharged into the filtering chamber through a water outlet of the water inlet pipe, filtering is performed through a second filtering plate and a first filtering plate, and during use, a sliding block on the second filtering plate is driven to slide in a spiral groove through rotation of the water inlet pipe; through guiding of a spiral groove and a vertical groove, a second filter plate reciprocates in the filter chamber, one is used for shaking dirt on the second filter plate, and the other is used for extruding dirt between the first filter plate and the second filter plate, so that sewage can better fall into the reaction chamber to react with a flocculating agent; and the practicability of the device is improved.

The invention discloses a damaged carton recycling device and method for carton packaging, and relates to the technical field of waste recycling, the damaged carton recycling device comprises a shell, two door bodies rotationally installed on the shell, a control module fixedly installed outside the shell and a data display module, the compaction assembly is mounted in the shell; the hydraulic rod is fixedly mounted at the top of the shell; and the compaction assembly comprises a bottom plate fixedly mounted at the bottom of the shell and an extrusion plate slidably mounted in the shell, a connecting sleeve is fixedly mounted on the extrusion plate, and the driving end of the hydraulic rod is fixedly connected with the connecting sleeve. The carton compacting device has the advantages that in the carton compacting process, through pressure equalizing and buffering of the pressure buffering assembly, negative pressure air exhaust gap discharging and resistance reducing, lateral protection restraining deformation and repeated tamping successive exhaust plastic deformation, the interlayer fitting degree and uniformity of paperboards can be synergistically improved, and the higher compression ratio and the lower rebound rate are achieved.

The embodiment of the present application relates to the field of precision machining technology, and discloses a high-precision aluminum alloy stamping process and die design method, which comprises the following steps: predicting material data of aluminum alloy to be processed according to experimental data of the aluminum alloy; the material data comprises material flow, springback and stress distribution data; simulating and predicting a die surface for compensating springback according to the material data of the aluminum alloy to be processed, so as to manufacture a stamping die; determining the spraying thickness of a lubricant according to the composition of the lubricant, the inner surface structure of the stamping die and the material data of the aluminum alloy to be processed; spraying the lubricant on the surface of the aluminum alloy to be processed according to the spraying thickness; step-by-step stamping the aluminum alloy to be processed; springback calibration is performed on the stamped aluminum alloy, so as to obtain calibrated aluminum alloy; after trimming the calibrated aluminum alloy, a formed aluminum alloy is obtained. The embodiment of the present application effectively reduces the springback problem in the machining process and reduces the trial and error cost.

The invention provides 450MPa-grade hot-dip galvanized low-density steel with low yield ratio and high corrosion resistance and a manufacturing method thereof. A steel plate comprises the following components in percentage by weight: 0.04%-0.06% of C, 0.25%-0.4% of Si, 1.4%-1.5% of Mn, 3.3%-6.5% of Al, less than or equal to 0.010% of P, 0.01%-0.03% of S, 0.01%-0.015% of RE and the balance of Fe and inevitable impurities. The manufacturing method of the steel comprises the steps of blast furnace molten iron pretreatment, converter steelmaking, continuous casting, hot continuous rolling, acid pickling, cold rolling and hot galvanizing. The steel structure is delta-ferrite, alpha-ferrite, martensite, retained austenite and sulfide, the content of the martensite is 3.5-5%, the sulfide is composed of a small amount of MnS and RE-S-O which are distributed in a dispersed mode, the small amount of MnS is separated out in the ferrite and the martensite in a dispersed mode, and the RE-S-O is distributed along the ferrite grain boundary.

The invention discloses application of a nutritional composition containing alpha-hydroxyisocaproic acid in weight management and blood fat improvement, and belongs to the fields of biological medicine manufacturing, biological medicine application and functional food development. The nutritional composition comprises alpha-hydroxyisocaproic acid and at least one second functional nutritional component, and the second functional nutritional component is preferably selected from one or more of the following components: 1) one or more of tea polyphenol and capsaicin; 2) one or more of beta-glucan, inulin and resistant dextrin; 3) one or more of medium chain triglyceride and sn-1, 3 diglyceride; under the condition of the same intake cycle and dosage, the nutritional composition can significantly improve the weight management effect and reduce related indexes of blood fat through a multi-way synergistic effect, and is combined with GLP-1 drugs or sequentially applied to weight management so as to reduce the risk of weight rise after drug withdrawal.

A vehicle body side wall double-door ring structure comprises a single-door ring sub-assembly and a C column sub-assembly, the single-door ring sub-assembly comprises an A column upper edge beam middle section, an A column upper edge beam lower section, an A column lower reinforcing plate, a threshold front reinforcing plate and a threshold rear reinforcing plate which are sequentially connected to form a first door ring, and the C column sub-assembly comprises a second door ring sub-assembly and a third door ring sub-assembly. The C-column sub-assembly comprises an A-column upper edge beam upper section and a C-column lower reinforcing plate, the A-column upper edge beam middle section, the A-column upper edge beam upper section, the C-column lower reinforcing plate and the threshold rear reinforcing plate are sequentially connected to form a second door ring, at least one of the connecting positions of all the part material pieces is in lap spot welding connection, and the rest part material pieces are in laser tailor welding connection. And the connected integrated material sheets are formed through hot stamping. According to the double-door-ring structure, laser tailor-welding and local lap joint are adopted at the same time, then integral hot stamping forming is conducted, on the basis of tailor-welding, a local overlapping lap joint spot welding area is increased, structural lap joint is optimized, a structural weak area is avoided, and local strength is improved without additional reinforcing pieces.

The invention discloses a double-station robot edge covering workstation, and relates to the technical field of robot workstations, the double-station robot edge covering workstation comprises two edge covering clamping tables, an edge covering manipulator, an electric appliance cabinet and a control cabinet, the two edge covering clamping tables are arranged on the two sides of the edge covering manipulator, and each edge covering clamping table is provided with a longitudinal lifting arm; each longitudinal lifting arm is provided with a plurality of top pressing rods, each edge covering clamping table is further rotationally provided with an edge covering rotary table, the execution end of the edge covering mechanical arm is provided with a rolling executor, each edge covering rotary table is provided with a plurality of side portion positioners, the side portion positioners are evenly distributed in a circumferential shape, and the rolling executor is provided with a plurality of side portion positioning devices. The side positioners and the top pressing rods are used for clamping and fixing a workpiece, the rolling actuator is used for edge covering of the workpiece, the rolling wheel repeatedly hammers the workpiece to be subjected to edge covering through vibration, and the function that hammering and rotary edge covering are carried out at the same time is achieved.

The application relates to a flattening device for carton production, which comprises a frame body, a conveyor for conveying carton boards arranged on the frame body, a plurality of guide rollers arranged along the length of the conveyor in sequence, a flattening mechanism arranged on the frame body and used for flattening the carton boards, characterized in that a heat source roller is arranged above the conveyor and used for hot pressing the carton boards, and a driving member is arranged on the frame body and used for driving the heat source roller to rotate. The flattening device can be used in cooperation with the heat source roller, the driving member and the flattening mechanism, the carton boards can be hot-pressed before being flattened, the carton boards are subjected to the joint action of heat and pressure, the flexibility of the carton boards is reduced, the resilience of the carton boards is weakened, the required pressure and time for subsequent flattening are reduced, the carton boards can reach the flatness requirement through one or a small number of flattening operations, and the production efficiency is improved.

The present disclosure provides a visual pressure regulating catheter, including: a catheter body (1), and a hydraulic dilation balloon (2) and a pressure regulating handle (3) both of which are disposed on the catheter body (1), an endoscope pressure regulating cavity (5) and a dilation liquid perfusion cavity (6) are formed in the catheter body (1), the dilation liquid perfusion cavity (6) is communicated with the hydraulic dilation balloon (2), and the pressure regulating handle (3) is provided with a perfusion port (301) which is communicated with the dilation fluid perfusion cavity (6) and a pressure regulating port (701) which is communicated with the endoscope pressure regulating cavity (5); an observation channel (4) is opened at a position on the endoscope pressure regulating cavity (5) axially opposite to the hydraulic dilation balloon (2), a camera at a front end of the endoscope sequentially passes through the pressure regulating port (701), the endoscope pressure regulating cavity (5) and the observation channel (4) and extends into the hydraulic dilation balloon (2), and an operating rod at a tail end of the endoscope is slidably and sealingly connected to the pressure regulating port (701).

The invention discloses a UHPC (Ultra High Performance Concrete) spraying trolley which comprises a frame used for supporting; the spraying adjusting device is used for adjusting the spraying angle and / or the spraying position of the concrete; the circular track positioning device is connected to the frame, is used as a walking track of the injection adjusting device and is used for adjusting the position relative to the frame so as to center the design center of the construction site; the rotary spraying and scattering device is connected to the spraying adjusting device and used for carrying out rotary spraying and scattering on the concrete; the formwork device is connected to the spraying adjusting device and used for adjusting the concrete spraying thickness; the detection system is arranged on the spraying adjusting device and used for detecting the compactness of sprayed concrete; and the walking system is connected to the frame and used for providing power for walking of the frame. According to the spraying and building trolley, spraying and lining of ultra-high performance concrete are achieved, the investment of constructors is greatly reduced, the labor intensity and the safety risk of workers are reduced, the comprehensive cost of building construction is reduced, and the construction efficiency is improved.

This invention provides a skeleton oil seal for large interference fit. The outer periphery of its rubber layer has radially protruding first, second, and third stepped sections from top to bottom. The bottom end of the third stepped section has an auxiliary chamfer. The interference fit of the three stepped sections is different, with the second stepped section having the largest interference fit. This simplifies the interference fit installation of the skeleton oil seal and optimizes stress distribution, reducing the maximum shear force. The auxiliary chamfer helps reduce the interference fit during initial press fit, facilitating smooth alignment of the bottom end of the skeleton oil seal and its forward insertion into the bearing. Multiple annular protrusions are provided on the outer sides of the three stepped sections, forming a wavy, concave-convex structure. This reduces the rebound of the skeleton oil seal after assembly, ensuring it is in the correct assembly position. While maintaining sealing performance, this reduces rubber compression, thus preserving rubber elasticity and extending the service life of the skeleton oil seal.

The utility model relates to the technical field of crash barriers, in particular to an intelligent robot crash barrier which comprises an intelligent robot body, side grooves are formed in the periphery of the intelligent robot body, and two symmetrical longitudinal force unloading assemblies are installed in the side grooves. Extrusion assemblies slidably mounted in the side grooves are arranged on one sides of the two longitudinal force unloading assemblies correspondingly, two buffer assemblies are fixed between the two extrusion assemblies, and two positioning blocks slidably connected with the buffer assemblies in a sleeving mode are fixed to the inner walls of the tops and the bottoms of the side grooves correspondingly; the extrusion assembly comprises a vertical shaft fixed in the side groove, and two symmetrical damping cone blocks are arranged on the vertical shaft in a sleeving mode. According to the intelligent robot, part of transverse collision force can be subjected to vertical force unloading buffering work, the collision strength of the intelligent robot body in the horizontal direction is reduced, and the rebound effect is reduced.