279 results about "Speed bump" patented technology

The invention relates to the technical field of vehicle control, in particular to a damping attenuation compensation method and device for a basic valve system of a continuous damping adjustable shock absorber, and the method comprises the steps: collecting the current mileage of a target vehicle, so as to determine whether the target vehicle carries out the self-inspection of the continuous damping adjustable shock absorber or not; under the condition that it is determined that self-inspection of the continuous damping adjustable shock absorber is conducted, the convergence time of a target vehicle passing through a preset deceleration ridge at different vehicle speeds is obtained; correcting a damping curve of the continuous damping adjustable controller of the target vehicle according to the convergence time at different vehicle speeds to obtain a target current of the continuous damping adjustable valve, comparing the target current with a current actual current of the continuous damping adjustable valve of the target vehicle to obtain a current deviation value, and outputting the current deviation value. And performing damping compensation on the continuous damping adjustable valve according to the current deviation value. Therefore, the problems that the damping force of the basic valve system is continuously attenuated along with the increase of the driving mileage of the vehicle, and stable driving and comfort of the vehicle are ensured by conventional control software are solved.

The invention discloses an automobile seat shaking control method and device. An automobile seat comprises a seat body and an X-axis motion control motor used for controlling the seat body to move front and back. The control method comprises the steps that S1, the acceleration value A of a vehicle is obtained, and a seat motion compensation model is established according to the acceleration value A; s2, calculating a motion compensation current according to the seat motion compensation model; and S3, the motion compensation current serves as the working current of an X-axis motion control motor, and the front-back motion speed of the automobile seat is controlled. According to the control method, the seat motion compensation model is established according to the acceleration of the vehicle, the motion of the seat is compensated, and then the working current of the X-axis motion control motor is calculated according to the seat motion compensation model, so that the forward and backward motion speed of the automobile seat is controlled, the pause feeling caused by acceleration and deceleration can be avoided, and the rocking comfort of the seat is improved.

The invention discloses a vehicle damping module, and relates to the technical field of vehicle damping, the vehicle damping module comprises a road condition sensing unit, the output end of the road condition sensing unit is in communication connection with a prediction control unit, the output end of the prediction control unit is electrically connected with an actuator assembly, and the prediction control unit is internally provided with a control algorithm. The control algorithm is based on the real-time speed of the vehicle, the characteristic parameters and a pre-stored vehicle dynamics model. According to the application, the road condition sensing unit fuses multi-source information and accurately recognizes and quantifies front road condition features, and the prediction control unit accurately calculates the time point when the wheels make contact with an obstacle based on a dynamic model and the real-time vehicle speed, so that precious pre-adjustment time is reserved for an execution mechanism; the damping coefficient of the electromagnetic shock absorber and the internal pressure intensity of the self-adaptive stiffness spring assembly can be adjusted to the optimal state before impact occurs, so that the impact load generated when the electromagnetic shock absorber passes through pits and deceleration strips is greatly smoothed, and the riding comfort is remarkably improved.

An energy generating speed bump assembly and a method for generating electrical energy therewith are described which integrate mechanical shock absorption with hydraulic power generation in a subterranean housing. The assembly includes a speed bump mounted within a channel configured for controlled vertical displacement. A helical compression spring connects the speed bump to a piston oil pump, converting vehicular kinetic energy into hydraulic pressure through a coordinated mechanical-hydraulic interface. The assembly includes a main oil reservoir and a compressed oil tank receiving hydraulic pressure to generate pressurized hydraulic fluid. The pressurized hydraulic fluid drives an oil turbine coupled to an electrical generator, facilitating power generation from vehicular traffic. The modular design of the assembly facilitates standardized installation within conventional roadway infrastructure. This integrated approach simultaneously provides traffic speed regulation and renewable energy generation while minimizing vehicular impact through controlled deceleration characteristics.

The invention discloses a device and a system for risk identification and early warning of an expressway operation area. The system comprises a portable pressure-sensitive deceleration strip, an integrated intelligent traffic cone and an engineering early warning vehicle, the two portable pressure-sensitive deceleration strips are arranged at the first-level early warning boundary and the second-level early warning boundary in front of the integrated intelligent traffic cone on the upstream of the operation area respectively and used for sending alarm signals to other associated equipment when it is detected that a vehicle on the high-speed early warning lane enters the early warning area; the integrated intelligent traffic cone is used for configuring integrated modules such as a monitoring camera, an audible and visual alarm and a character notice board according to an early warning effect when the traffic cone is automatically placed at a set position so as to identify risks inside and outside an operation area and perform early warning; and the engineering early warning vehicle is used for assisting in identifying risks inside and outside the operation area, processing early warning information and slowing down collision. By constructing the device and the system for identifying and early warning the risks of people, vehicles and equipment in the expressway operation area, the external vehicle intrusion risk and the internal personnel and equipment risk in the operation area can be actively found, an alarm prompt is given before the risks come, workers in the operation area are guided to rapidly evacuate, and casualties caused by accidents are reduced.

Embodiments of the present disclosure relate to ground surface estimation using localized surface fitting. A three-dimensional (3D) surface structure (e.g., a road surface profile) may be estimated using a nonlinear optimization to fit height values to (e.g., accumulated, bias-corrected) LiDAR detections (e.g., sampled in localized regions along one or more predicted trajectories). For example, LiDAR data (e.g., detected 3D point clouds) may be ego-motion compensated, corrected for measurement bias, accumulated, and sampled along one or more predicted trajectories, and the height of each trajectory point may be fitted to the heights of the corresponding sampled points using a nonlinear optimization. As such, the resulting road surface profile (e.g., modeled along the wheel track(s)) may be provided to an adaptive suspension control system to modulate the damping characteristic of the suspension system to counteract indentations (e.g., potholes) or protrusions (e.g., speed bumps) represented in the road surface profile.

An electronic parking brake system that generates a clamping force required for parking of trailer-mounted towing vehicles includes an electronic parking brake provided on at least one of front and rear wheels of the towing vehicle; and a controller configured to receive a front wheel speed, a rear wheel speed, and a longitudinal acceleration of the towing vehicle, determine whether or not the trailer is mounted based on changes in the received front wheel speed, rear wheel speed, and longitudinal acceleration when the towing vehicle passes a speed bump, and determine the clamping force required for parking according to whether or not the trailer is mounted when parking is operated, and control the electronic parking brake to generate the determined clamping force.

The present invention discloses a pneumatic lifting speed bump, which comprises a lifting plate, a power assembly and a load-bearing bracket. The lifting plate is composed of longitudinal guide rails and side plates. The side plates are connected to both sides of the longitudinal guide rails. The power assembly is composed of a lifting cylinder, a damping cylinder, a high-pressure gas storage tank and a low-pressure gas storage tank. The high-pressure gas storage tank and the low-pressure gas storage tank are welded by a cross beam frame to form a groove rail with an integral structure. A number of lifting cylinders and damping cylinders are arranged alternately and evenly installed on the cross beam frame inside the groove rail. The width of the longitudinal guide rail corresponds to the groove width of the groove rail. The piston rod end of the lifting cylinder is connected to the longitudinal guide rail, so that the lifting plate and the power assembly form a mechanical body of the pneumatic lifting speed bump. An edge bracket is provided on the outer edge of the groove rail to be located on the load-bearing bracket, and the load-bearing bracket is embedded and installed in a preset ground groove pit at a traffic intersection. The present invention adopts a pneumatic lifting method with multiple cylinders and double gas storage tanks for voltage stabilization, achieving the purpose of a lifting speed bump that can pass smoothly when decelerating, give a warning when speeding, and impose a penalty through jolting.

The invention provides a control method for reducing pitching of an electric vehicle, a motor controller and the electric vehicle, and is applied to the technical field of electric vehicles, and the control method is used for adjusting torque output by a driving system in the process that the electric vehicle passes through a deceleration strip so as to improve the driving comfort. The output torque is adjusted by actively controlling the front drive motor and the rear drive motor, the backward moving degree of the gravity center of the electric vehicle is adjusted, the sprung mass of the front suspension and the sprung mass of the rear suspension are adjusted, the offset frequency of the wheel ends of the suspensions is rapidly adjusted, and the heights of the front suspension and the rear suspension change at the same frequency (for example, compression and bounce at the same time); the front axle and the rear axle of the electric vehicle are changed at the same frequency, pitching of the electric vehicle is reduced, and the driving comfort is improved in the process that the electric vehicle passes through the deceleration strip. And after the two rear wheels leave the deceleration strip, the front-drive motor and the rear-drive motor are actively controlled to adjust the output torque, the same-frequency change of the front shaft and the rear shaft of the electric vehicle is rapidly controlled, and the pitching of the electric vehicle is reduced.

The invention provides a correction deviation value obtaining method and device. According to the method and the device, the situation that the vehicle presses the elevation change object such as a well lid, a pit or a deceleration strip on the ground under the condition that the vehicle does not have actual collision is considered, so that the pressing moment when the vehicle actually presses the elevation change object such as the well lid, the pit or the deceleration strip is obtained. And the correction deviation value is obtained based on the over-pressing moment, so that subsequent error correction is facilitated. According to the method, the first distance correction deviation value of the distance sensor, the first speed correction deviation value of the speed sensor and the first moment correction deviation value of the output moment when the distance sensor outputs the distance can be obtained under the condition that the vehicle is not subjected to actual collision, so that the safety of the vehicle is improved; and the precision of the obtained first distance correction deviation value, the first speed correction deviation value and the first moment correction deviation value is not reduced.

The invention discloses an intelligent access control anti-collision barrier gate, and particularly relates to the technical field of access control barrier gates, the intelligent access control anti-collision barrier gate comprises a base, a case is fixed at the top end of the base, a blocking piece is arranged on one side of the case, a deceleration strip is arranged at the bottom of the blocking piece, and an automatic license plate recognizer is fixed at the top end of the base through a mounting frame and used for recognizing license plate information of a vehicle. A radar velocimeter is fixed on the mounting frame and is used for acquiring the driving speed and acceleration data of a vehicle in the process of approaching a barrier gate in real time, and a panoramic camera is fixed at the top end of the case and is used for shooting the driving track of the vehicle so as to judge whether the vehicle maliciously intrudes into a community or not. The vehicle behavior can be intelligently judged, so that the registration release or blocking interception process is triggered, the safety and the passing efficiency are both considered, the daily life of residents is facilitated, and the internal management of a community is facilitated.

The invention relates to the technical field of road safety facilities, in particular to a gradient effect concave deceleration strip visual grading mark design method which comprises the steps that S1, basic design data of a target road scene are obtained, and the basic design data comprise a target limited vehicle speed numerical value and a total length numerical value of a deceleration area; s2, according to the basic design data, geometric configuration parameters of a plurality of concave speed reduction units sequentially arranged in the vehicle advancing direction are calculated, and the geometric configuration parameters comprise the concave depth numerical value of each concave speed reduction unit and the distance numerical value between every two adjacent concave speed reduction units; the concave depth value obtained through calculation presents a gradually increasing trend in the vehicle advancing direction. According to the method, the concave speed reduction units with the gradually-increased depth and the gradually-decreased interval are configured through an algorithm, the overspeed vehicle is forced to decelerate through non-linear amplified composite vibration, and the control efficiency of road section speed limiting is improved.

The utility model relates to the field of bus getting-on and getting-off auxiliary devices, in particular to a barrier-free getting-on and getting-off auxiliary device. The getting-on and getting-off auxiliary device is arranged on the bottom side of a bus door, a lower bottom plate is arranged at the bottom of the getting-on and getting-off auxiliary device, a movable getting-on and getting-off plate is arranged on the lower bottom plate and can stretch out between an upper bottom plate and the lower bottom plate, a roller device is arranged in the middle of the getting-on and getting-off plate, and handrail devices are arranged on the two sides of the getting-on and getting-off plate. A baffle capable of being opened and closed is arranged on the outward extending part of the loading and unloading plate; a rotating device is arranged at the top of the getting-on and getting-off plate, three telescopic rods are arranged behind the rotating device, and the whole getting-on and getting-off auxiliary device is controlled to operate through a bus control center. The roller device can slowly rotate to provide getting-on assistance during getting-on, the wheelchair can conveniently get on and get off, the getting-off speed is slowed down under the action of a deceleration strip during getting-on and getting-off, safety is guaranteed, and the whole getting-on and getting-off plate can be rapidly erected and is convenient to install.

The application provides a speed bump energy absorption working condition recognition method and system, and relates to the technical field of intelligent transportation systems.The method collects vehicle weight, speed and vertical acceleration data in real time through a laser radar and a load cell, constructs a full-quantity feature data set, first calculates kinetic energy change and vertical impact energy, and after the cumulative energy reaches a threshold, stores the speed and acceleration data before and after the speed bump according to vehicle weight, performs Fourier transform on the acceleration data, extracts the low-frequency energy proportion, and constructs a quadratic regression model combined with the speed before and after the speed bump to predict the speed after passing through.The energy proportion abnormal threshold is set by statistical stratification of the mean and standard deviation of the energy proportion database, and when the low-frequency energy proportion of a new vehicle is lower than the energy proportion abnormal threshold and the speed prediction error is greater than or equal to 15%, it is determined that the energy absorption structure fails, and the dynamic monitoring and accurate diagnosis of the health state of the speed bump are realized.

1. The name of this design product: Speed bump (U-shaped groove). 2. Purpose of this design product: U-shaped groove speed bump used to slow down vehicles on the road. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

A control system for controlling vehicle speed to navigate a speed bump comprises controllers configured to receive speed bump information from a geographic information system indicative of a position

The invention relates to the technical field of deceleration hillocks, and discloses a stable deceleration hillock and a pavement process of the deceleration hillock, the stable deceleration hillock comprises a plurality of frameworks, asphalt layers are arranged outside the frameworks, and the plurality of frameworks and the asphalt layers outside the frameworks can be spliced to form the deceleration hillock; the framework is hollow, a separation assembly is arranged in the framework, the separation assembly comprises two separation rods, and the two separation rods are used for separating the joint of an asphalt layer and a road surface; the separation assembly comprises a jacking mechanism; butt joint mechanisms are arranged at the two ends of the framework. The deceleration hill can be formed by splicing the multiple frameworks and the asphalt layers outside the frameworks, the whole asphalt layers are firmly bonded to the road surface through the bonding materials in the four square grooves in the bottoms of the asphalt layers, stable installation of the asphalt layers is achieved, and compared with a conventional mode that fasteners are knocked into the road surface for installation, damage to the road surface is effectively avoided.

The utility model relates to the technical field of deceleration strips, and discloses a municipal deceleration strip which comprises a road surface and a deceleration strip body installed on the road surface, installation grooves are formed in the two sides of the surface of the deceleration strip body, installation screws are arranged on the surfaces of the installation grooves, and the deceleration strip body can be installed on the surface of the road surface through the installation screws. A plurality of gutter channels are formed in the surface of the deceleration strip body, and a dredging mechanism capable of dredging the gutter channels is arranged on one side of the surface of the deceleration strip body; when the deceleration strip is used, the two sides of the deceleration strip body can be communicated under the action of the gutter channel in rainy days, so that rainwater is prevented from being gathered on one side, the use safety of the deceleration strip body is improved, in addition, if the gutter channel is blocked by silt, a worker can dredge the gutter channel by using the dredging mechanism, and the working efficiency is improved. The working efficiency of dredging the gutter channel by workers is improved, and invalid workers can find proper tools again.

A portable speed bump assembly includes a dolly and a spool that is rotatably attached to the dolly. A speed bump unit is rolled around the spool and the speed bump unit is played outwardly from the spool when the spool is rotated in a second direction to laid the speed bump unit across a roadway. The speed bump unit compels traffic on the roadway to slow down while driving over the speed bump unit thereby reducing the average speed of the traffic. The speed bump unit is rolled around the spool when the spool is rotated in the first direction for storing the speed bump unit. A drive unit is attached to the dolly and the drive unit is in mechanical communication with the spool for rotating the spool in either the first direction or the second direction.

The utility model discloses a road surface deceleration strip component which comprises a road surface and a roadbed, a mounting groove is formed in the road surface and penetrates into the roadbed, the road surface deceleration strip component comprises a foundation body component, a surface layer, a ground combination layer and a bonding firm layer, the foundation body component is filled in the mounting groove, and the foundation body component is fixed in the mounting groove through the bonding firm layer; the surface layer covers the top surface of the foundation main body component and is connected with the foundation main body component through cement mortar; the ground combining layer is used for fixing the foundation main body component on the roadbed, the bonding firm layer is used for fixing the foundation main body component in the mounting groove, polyurea is injected into a gap between the foundation main body component and the ground and a gap between the foundation main body component and the mounting groove, and the polyurea is cured into the ground combining layer and the bonding firm layer through reaction; after construction, the curing speed is high, the construction period is short, and meanwhile, due to the particularity of materials, the material is harmless to the environment and human bodies after construction.

The invention belongs to the technical field of speed bump design, and discloses a road surface speed bump optimization design method based on vehicle-road coupling vibration response, which comprises the following steps of: determining asymmetric segmented curve design of a speed bump; resolving analytic expressions of curves of different structural sections of the deceleration strip; establishing a speed bump combination curve scheme, and combining the cosine segment and the parabolic segment according to different horizontal projection lengths; establishing a coupling model among the wheels, the suspension system, the vehicle body and the road surface; the height of the speed bump is set to obtain different working conditions under various curve combination schemes; and screening an optimal speed bump scheme according to a vibration response result. According to the invention, the traditional speed bump design is broken through, and technical optimization is realized on multiple aspects such as speed reduction control, driving comfort and retrograde driving warning.

The application discloses a speed bump recognition method and system, real-time vehicle information is acquired, the vehicle information at least includes the vertical acceleration signal of the vehicle body, the vertical acceleration signal of the vehicle body is filtered through a pre-designed filter set, the filtering result of the effective speed bump candidate identification is obtained, if the filtering result of the effective speed bump candidate identification meets the speed bump recognition condition, the target speed bump identification is obtained from the filtering result of the effective speed bump candidate identification, and the target speed bump identification is determined as the speed bump area, so as to ensure the accuracy of the acquired speed bump area, improve the vehicle auxiliary control, and the speed bump recognition mechanism is used for preventing the same speed bump from being repeatedly identified when the left and right wheels of the vehicle do not cross the speed bump at the same time.

Vehicle display device (10) which displays a predetermined image in a display area (24, 25, 26) indicating a forward view of a vehicle (12), comprising: a memory (34); and a processor (30) connected to the memory (34), wherein the processor (30) is configured to: to identify a lane (70) on which the vehicle (12) is traveling; detect a position (O) of the vehicle (12) relative to the lane (70); based on the lane (70) and the position (O) of the vehicle (12) detected by the processor (30), determine whether there is a possibility that the vehicle (12) is deviating from the lane (70); and In a case where it has been determined that there is a possibility that the vehicle (12) may deviate from the lane (70), an image of a stereoscopic object (B) arranged along the lane (70) is to be displayed in the display area (24, 25, 26). characterized by the fact that the processor (30) is further configured to display the image of the stereoscopic object (B) in the display area (24, 25, 26) such that: the stereoscopic object (B) appears to move along the track (70) from a background side to a foreground side of the display area (24, 25, 26); and the stereoscopic object (B), whose movement has stopped at the foreground of the display area (24, 25, 26), appears to vibrate to simulate the movement of the vehicle (12) over a three-dimensional object such as a rumble strip, the image of the stereoscopic object (B) is caused to oscillate in a vertical, lateral or oblique direction, enabling the occupant to experience a realistic sensation as if the vehicle were vibrating as a result of driving over a rumble strip.

The utility model discloses a folding speed brake, which relates to the technical field of speed brakes and comprises a speed brake main body, one end of the speed brake main body is connected with a connecting mechanism, one end of the connecting mechanism is connected with an auxiliary plate, and the speed brake main body comprises a movable plate. Through the cooperation of the speed brake main body, the open groove, the reflector, the movable plate, the reflective coating, the connecting column, the spring, the limiting sleeve, the movable groove and the first non-slip mat, the light of an automobile can be reflected through the arrangement of the reflector and the reflective coating, a driver is reminded that a speed bump exists on the road surface, the movable plate is jacked up through the spring, and the speed bump is prevented from falling off. When an automobile passes through the surface of the movable plate, the movable plate has a certain sinking space due to the elastic force of the spring, so that the passing automobile cannot be too bumpy, and the purpose of enabling the driver to pass through in a decelerating mode is effectively achieved.

The invention discloses an expressway rescue remote early warning device with an anti-collision function, and particularly relates to the technical field of rescue remote early warning, the expressway rescue remote early warning device comprises a shell, transmission wheels are rotationally connected to the left end and the right end of the shell in a front-back symmetrical mode, and a rubber track is jointly arranged on the outer surfaces of the transmission wheels on the same side; a power control mechanism is fixedly installed at the rear end of the shell, an early warning assembly is arranged on the front portion of an inner cavity of the shell, and a speed reduction assembly is arranged on the rear portion of the inner cavity of the shell. According to the expressway rescue remote early warning device with the anti-collision function, through arrangement of the laying mechanism and the adjusting mechanism, remote early warning of expressway rescue can be achieved, a deceleration strip can be rapidly laid when an emergency occurs, an obvious deceleration signal is provided for an approaching vehicle, the accident occurrence probability is reduced, and the safety of the expressway rescue is improved. The traffic safety of a rescue site is ensured, the rescue response efficiency can be greatly improved, the secondary accident risk is reduced, and the overall road rescue and traffic management capability is improved.

The application discloses a road damage detection method and device based on crack morphology, equipment and a storage medium, and relates to the technical field of intelligent transportation. The method comprises the following steps: acquiring a visible light image, a polarized light image, three-dimensional terrain data and material reflectivity data of a target road surface to obtain a multi-source multi-modal data set; performing interference separation on the multi-source multi-modal data set to obtain a crack candidate data set; performing multi-dimensional constraint screening and region elimination on the crack candidate data set to obtain a target crack region; performing space-time correlation morphology tracking on the target crack region to extract three-dimensional morphology parameters and continuity indexes of the target crack; inputting the three-dimensional morphology parameters and the continuity indexes into a road condition-damage correlation model to obtain road damage grade and crack development trend evaluation results, and completing road damage detection. The application can accurately detect road damage of crack morphology in complex road conditions with interference objects such as repair marks, manhole covers, speed reduction belts and road markings.

The present application relates to the technical field of vehicle control, and discloses a vehicle control method and device under the working condition of a speed bump, a vehicle, a medium and a program. When a speed bump exists in front of the vehicle, the first distance between the front wheel and the speed bump and the initial state parameters of the vehicle are used to determine the second distance between the front wheel and the speed bump when the adjustment starts in the future. When the current distance is less than the second distance, the front axle motor torque is reduced, the rear axle motor torque is increased, and the front and rear suspension dampings are adjusted to prevent the front wheel from skipping forward when it passes through the speed bump. When the front wheel passes through the speed bump, the front axle motor torque is increased, the rear axle motor torque is reduced, and the front and rear suspension dampings are adjusted to prevent the rear wheel from skipping forward when it passes through the speed bump. Finally, when the rear wheel passes through the speed bump, the vehicle torque and damping are restored to the initial state, ensuring the consistency of the state before and after the vehicle passes through the speed bump, thereby improving the driving experience of the user.

The present invention relates to a sunken speed bump structure for a smart sponge city, which includes a speed bump main body arranged across the entire width of the road surface. Among them, the speed bump main body is a sunken structure, and the speed bump main body adopts a cross-section structure of tangent circles. The speed bump main body is divided into a front slope section, a flat section and a rear slope section connected in sequence according to the transverse section. The front slope section and the rear slope section are respectively connected to the road surface. The speed bump main body is divided into a speed bump surface layer and a speed bump permeable structure layer from top to bottom according to the longitudinal section, and a drainage blind pipe is arranged in the speed bump permeable structure layer. Compared with the prior art, the present invention can effectively realize rainwater runoff transmission, facilitate maintenance and cleaning, improve drainage capacity, shorten the water recession time, and greatly reduce the driving safety risk at the same time.

The utility model discloses a cylinder body structure of an integrated double-channel type oil-gas separation pre-filtering cavity. The cylinder body structure comprises a plurality of gas inlet windows, a plurality of gas feeding channels and the pre-filtering cavity. A plurality of air inlet windows are arranged at a part of prisms on one side of a main shaft hole of the cylinder body and are communicated with a crankcase; the plurality of upper air channels are arranged in part of the prisms, and the plurality of air inlet windows are communicated with the plurality of upper air channels; the pre-filtering cavity is formed in the side wall of one side of the air cylinder body and communicates with the multiple upper air channels. Wherein one end of the respirator air inlet pipeline is communicated with the pre-filtering cavity, and the other end is communicated with an air inlet of the respirator. According to the air cylinder body structure integrating the double-channel type oil-gas separation pre-filtering cavity, the strength of the air cylinder body can be guaranteed, meanwhile, the oil-gas deceleration strip effect can be effectively formed, and the oil content at an outlet of a respirator can be reduced to a great extent.