976 results about "Spoiler" patented technology

The invention relates to an offshore wind power pile foundation anti-scouring structure, and belongs to the technical field of offshore wind power construction, and the offshore wind power pile foundation anti-scouring structure comprises a pile foundation main body, a plurality of spoilers, a protective cylinder, a sand seepage cover and filling stones; the pile foundation main body is columnar, and the pile foundation main body is configured to be inserted into a seabed of a preset area; the pile foundation body is sleeved with the protection barrel, one end of the protection barrel is located on a seabed, the other end of the protection barrel is covered with the sand seepage cover, and a plurality of through holes are formed in the barrel wall of the protection barrel. The multiple spoilers are arranged outside the protective cylinder in the circumferential direction of the protective cylinder and connected with the protective cylinder, each spoiler comprises a spoiler vertical plate and a spoiler side plate, the spoiler vertical plate is parallel to the axis direction of the pile foundation body, and an acute included angle is formed between the spoiler side plate and the spoiler vertical plate; the space between the protective cylinder and the pile foundation body is filled with the filling stone, and the beneficial effect of prolonging the service life of the offshore wind power pile foundation is achieved.

The utility model belongs to the technical field of test boxes, and particularly relates to a high-low temperature test box with uniform heating. Comprising test cavities which are arranged in a test box at intervals left and right; a placement net plate is embedded in the bottom of the test cavity; the fans are arranged below the placing net plate in a bilateral symmetry manner; the air inlet end of the fan is communicated with the test cavity through the placing screen plate, and the air outlet end of the fan is communicated with the air duct cavity; the air duct cavities are distributed on the left side wall and the right side wall of the test cavity in a bilateral symmetry manner; a spoiler is vertically and obliquely arranged in the air duct cavity, and an air distribution plate is arranged at the air return end of the air duct cavity. According to the utility model, through the arrangement of the spoiler and the air distribution plate in the air duct cavity, high and low temperature airflow with uniform airflow distribution can be provided for the interior of the test cavity, so that the temperature rise rates of different areas are consistent, and the uniform heating effect during product testing is further improved.

The invention relates to the technical field of heat exchanger design, and provides a supercritical LNG heat exchanger design method and system.The method comprises the steps that A, a wing-shaped fin spoiler is adopted to be installed in a PCHE channel, an internal spoiler structure matched with the channel is formed, and the heat transfer performance of a supercritical LNG mixed working medium is enhanced; b, by adjusting the heat transfer process of the mixed working medium in the channel, the heat transfer performance and the flow resistance of the mixed working medium in the channel of the PCHE are balanced; c, regulating and controlling operable parameters through a multi-objective numerical optimization technology so as to balance the channel internal heat transfer performance and flow energy consumption of the PCHE; wherein the operable parameters are used for directly regulating and controlling the heat transfer and flow process in the PCHE channel. According to the invention, the average wall temperature can be reduced by 2.24% through the wing-shaped fin structure, and the increase of the pressure drop in the PCHE channel is controllable.

The invention discloses an anti-scouring system for an offshore pile foundation, belongs to the technical field of offshore pile foundations, and can solve the problems that in the prior art, the installation difficulty is large, and the adaptability to the marine environment is poor. The system comprises a plurality of spoilers which are annularly distributed in the circumferential direction of the pile foundation. The horizontal plane projection of the spoiler is in a symmetrical sharp corner shape, the spoiler comprises a sharp corner end and a diffusion end which are opposite to each other, the sharp corner end is elastically connected with the pile foundation and can vertically swing under the action of ocean current, and the diffusion end overhangs in the direction away from the pile foundation; the center axis of the spoiler intersects with the axis of the pile foundation, and the sharp corner end is higher than the diffusion end. The spoiler is provided with two wing plates which are symmetrically distributed along the central axis of the spoiler, and the section of each wing plate on the section perpendicular to the central axis is in a concave arc shape. And a gap is formed between the diffusion ends of the adjacent spoilers. The anti-scour protection device is used for anti-scour protection of the offshore pile foundation.

A car spoiler may include a spoiler, and the spoiler has two arms, a main body, and two lateral portions. The two arms secured on a vehicle are connected to the main body, and each of two lateral ends of the main body is connected to one lateral portion. A rear side of the main body has at least a spoiler piece, and the spoiler piece is assembled with the main body through any number of connecting member, so that the different shapes, sizes, angles and curvatures of spoiler piece is detached, replaced, and reassembled with the main body to improve the stability of the vehicle.

The tailgate spoiler storage system described herein adds storage to a vehicle tailgate spoiler. The tailgate spoiler storage system includes 1) a tailgate pivotally connected to a cargo box of a vehicle and 2) a spoiler extending behind the tailgate. The spoiler includes 1) an upper member supported on a top surface of the tailgate, 2) a vertical member extending from the upper member along a rear surface of the tailgate, and 3) an angled bottom member extending between the vertical member and the upper member. The tailgate spoiler storage system also includes a pullout drawer disposed within, and laterally extendable from, the spoiler.

The invention relates to the technical field of soil disintegration measurement, and discloses a test device for a soil disintegration test, which comprises a shell, the outer wall of the shell is rotatably connected with a turntable, the top of the shell is fixedly connected with a suspension rod, the outer wall of the suspension rod is fixedly connected with an iron wire net, and the inner wall of the iron wire net is fixedly connected with a soil taking knife sample. When a cylinder rotates, two balancing weights slide in the direction away from each other, a ball head is extruded to make contact with inclined faces on two spoilers, the two spoilers are extruded to move in the direction away from each other, and the water contact area of the two spoilers and the outer wall of a fixed shell is increased; water is driven to rotate along with the cylinder under the limitation of the flow guide plate, and part of water flow can pass through the flow guide holes in the flow guide plate, so that the rotating speed difference generated by inner and outer water bodies due to instantaneous acceleration of the cylinder is effectively reduced, and then local vortex is generated.

A movable spoiler device is provided in the disclosure. The movable spoiler device includes: a fixed part, fixed on a body of a vehicle; a movable part, configured to be movable between a storage position connected to the fixed part and a deployed position protruding from the fixed part toward rear of the vehicle; an actuator, disposed on the fixed part and drives the movable part to move in a front-rear direction of the vehicle; and a cover member, disposed on the fixed part and connected to the movable part so as to be linked with the movable part, in which there is a gap between the movable part and the fixed part due to the movement of the movable part, when the movable part moves from the storage position to the deployed position, the cover member is driven by the movable part to move and cover the gap.

The invention discloses a combined marine heat exchanger, and belongs to the technical field of ship engineering, the combined marine heat exchanger comprises two heat exchanger shells, the number of the heat exchanger shells is two, and two fixing discs are fixedly mounted at the positions, close to the top and the bottom, between the inner walls of the heat exchanger shells correspondingly; a plurality of heat exchange tubes are fixedly mounted on the heat exchanger shell through a fixing disc; according to the heat exchanger, the piston rod slides up and down in the piston cylinder in a reciprocating mode to drive the spoiler at the top end of the piston rod to synchronously reciprocate along the outer wall of the heat exchange tube, the spoiler interacts with a shell pass medium in the moving process, and meanwhile the impeller at the top end is driven to synchronously rotate under the impact of the medium; the piston rod drives the spoiler to reciprocate and rotate and disturb the impeller, so that the flow disturbance intensity of a shell pass medium can be enhanced, the flow stability of the medium is broken, a medium retention area on the outer wall of the heat exchange tube is avoided, the heat transfer efficiency is improved, and the stability of the heat exchange performance of equipment is guaranteed.

A blade fiber preform for a turbomachine has a three-dimensional or multi-layer weave including in one piece a root preform part, a shank preform part, first and second platform preform parts, upstream and downstream wall preform parts, upstream and downstream spoiler preform parts, and an airfoil part. The preform further includes unidirectional fabric portions folded down onto the shank preform part and third and fourth unidirectional fabric portions folded down onto the airfoil part.

The invention discloses an engine oil filter with a spiral spoiler. The engine oil filter comprises a bottom shell, an outer cover is fixedly connected to the bottom shell, a liquid inlet and a liquid outlet are formed in the bottom shell, a check valve is arranged on the liquid inlet, a connecting cylinder is fixedly connected into the liquid outlet, a filter element structure is fixedly connected to the connecting cylinder, and a bypass valve is arranged on the filter element structure; the flow guide assembly comprises a first spiral spoiler, the first spiral spoiler is located between the filter element structure and the outer cover, the first spiral spoiler is rotationally connected to the annular base, the bypass valve is fixedly connected with the annular base through a connecting mechanism, a supporting mechanism is fixedly connected into the outer cover, and a stop mechanism is arranged between the supporting mechanism and the annular base. Impurities of engine oil can be prevented from being gathered at a certain position, the use of a filtering part is more balanced, the durability of the device is improved, meanwhile, oil liquid can flow along the spoiler during operation, and large particles generate centrifugal force, so that the oil liquid is thrown to the wall surface and flows to the bottom along the spoiler, and the blockage degree of the filter element is reduced.

The invention discloses a cement thickness degree detection device, and belongs to the technical field of cement thickness degree detection, the cement thickness degree detection device comprises a cabinet body, a fixed screen seat is arranged on the top side in the cabinet body, and the bottom side in the fixed screen seat is connected with a sealing gasket. A detection worker manually operates a circular plate to drive two arc-shaped sliding blocks, a circular sleeve and an elastic conical cover to move downwards, in the up-down reciprocating motion process of the elastic conical cover, vibration is generated on the surface of the bottom of the elastic conical cover, adhered cement fine particles are effectively shaken off, sample residues are remarkably reduced, and therefore the accuracy of a detection result is guaranteed; in the downward moving process of a circular sleeve, a connecting shaft, a mounting sleeve and a plurality of spoilers are driven to synchronously and slowly rotate under the acting force of a guide rod and an arc-shaped groove, and ordered mild airflow shearing force is formed in the top area of the test screen through the slow rotating motion of the spoilers so as to assist and promote the fine powder penetration phenomenon of the test screen; and the screen analysis efficiency and uniformity of the device are improved.

1. Name of the designed product: automobile spoiler. 2. Use of the designed product: accessory for the rear of an automobile. 3. Design points of the designed product: in shape. 4. Picture or photograph best indicating the design points: perspective view 1.

A multi-part rear spoiler (1) comprising a base carrier (2) connectable to a motor vehicle body and an upper shell (3) arranged on the base carrier (2), wherein the upper shell (3) and the base carrier (2) are connected to each other by at least three positive locking connections which differ in their respective complementary interlocking means and wherein a first positive locking connection is a latching pawl connection (4) formed internally in an end-face transition area (7) in the rear spoiler (1), in which at least a first positive locking means formed as a latch (19) engages at least partially behind a first complementary positive locking means formed as a latch handle (20) and a second positive locking connection is an overlap connection (5) formed in a rear-face area (8) of the rear spoiler (1) spaced apart from the end-face transition area (7),in which a second form-locking element shaped as a lip (25) and a second complementary form-locking element shaped as a counter-lip (26) at least partially interlock each other, wherein the first form-locking connection realizes a form-lock at least along the longitudinal axis and the second form-locking connection realizes a form-lock at least on one side of the vertical axis, in the direction of the upper shell (3) as well as at least on one side of the longitudinal axis in the direction of the front transition area, and in addition a third form-locking connection is formed in side wall areas (9) of the rear spoiler (1).

The invention discloses an active turbulent flow type sand blocking system. The active turbulent flow type sand blocking system comprises a first turbulent flow belt, wherein the first turbulent flow belt comprises a first supporting column, a first cable net and a first wind resistance plate; the plurality of first supporting columns are arranged side by side into a plurality of rows and are distributed at intervals; the first cable net is connected between every two adjacent first supporting columns in each row; and a plurality of first wind resistance plates are arranged on each row of first cable nets, and the plurality of first wind resistance plates on each row of first cable nets are distributed between the adjacent first supporting columns at intervals. According to the active turbulent flow type sand blocking system, the turbulent flow field is constructed and formed through point vortexes formed at all the wind blocking plates, the turbulent flow field is used for achieving active turbulent flow on wind-sand flow, macroscopic ordered kinetic energy efficient dissipation is conducted on the wind-sand flow, and the purposes of effective interception and sedimentation are achieved.

1. Name of the designed product: Car spoiler (Aventador 12). 2. Use of the designed product: Car spoiler for Aventador 12. 3. Design points of the designed product: In shape. 4. Picture or photo that best shows the design points: Perspective view 1.

The utility model provides a work fixture for left and right spoilers of an automobile, which comprises a support frame, a placing frame is rotatably matched on the support frame, a plurality of fixing frames are fixed on the placing frame, a sliding plate is slidably matched on one side of each fixing frame, a pushing structure is fixed on one side of each fixing frame, and the pushing structures correspond to the sliding plates. A rotating frame is in sliding fit with one side of the sliding plate, a positioning structure is arranged between the rotating frame and the sliding plate, a mounting block is rotationally matched in the rotating frame, and a clamping plate is fixed to the mounting block. According to the spoiler fixing device, the height and the angle of the clamping plates can be adjusted, the spoiler is clamped and fixed through the multiple clamping plates, the clamping plates are made to be better attached to the radian of the spoiler, and therefore a good fixing effect can be achieved, the spoiler fixing device is suitable for spoilers of various specifications, and the application range of the spoiler fixing device is widened; and the placing frame can be rotated, so that the clamped spoiler is driven to rotate, and the spoiler is convenient to machine.

The invention discloses a self-vibration long-service-life turbolator, a heat exchanger and a design adjusting method. The turbolator comprises a spoiler and a spring, wherein the spoiler comprises a rigid support rod, spoiler teeth and a resistor. The heat exchanger comprises an inlet tube box, an inlet tube plate, a heat exchange tube, an outlet tube plate and an outlet tube box, and further comprises the self-vibration long-service-life turbolator. According to the design adjustment method, the design adjustment of the application is completed according to the vibration frequency and the amplitude for the turbolator. The heat exchanger has the beneficial effects that heat transfer can be effectively enhanced under the dynamic working conditions (such as vibration and rolling), the service life is longer, the adjustability is better, the applicability is wider, and therefore the requirements of the industrial heat exchanger for the efficient, stable and long-acting heat transfer technology are met.

The utility model discloses a water spraying wiper blade with a water delivery rubber pipe convenient to assemble, which comprises a wiper blade, a spoiler, a fixed seat, a connecting piece, a rubber adapter and a wiping arm, and the water delivery rubber pipe is arranged in the wiping arm; the device is characterized in that a water inlet pipe and a rubber adapter are arranged in the fixing base, the rubber adapter serves as an accessory of a scraping piece to form a scraping piece assembly, one end of the rubber adapter is connected with the water inlet pipe in an inserted mode, and the other end of the rubber adapter is connected with the water conveying rubber pipe in an inserted mode; and the scraping arm is connected with the connecting piece. When a terminal customer replaces the wiper blade, the connector of the wiper arm is connected to the connecting piece, then the hollow connecting plug is inserted into the end, connected with the water conveying rubber pipe in an inserted mode, of the rubber adapter, the water spraying wiper blade can be assembled, and the water spraying wiper blade has the advantages of being easy, convenient and friendly to assemble.

The utility model belongs to ship equipment technical field discloses a kind of wave compression device and boat. Wave compression device includes hinged six-bar mechanism, spoiler piece and rotary drive part, rotary drive part drives spoiler piece rotation by hinged six-bar mechanism, to make spoiler piece have the working position of extension into water. The utility model is driven by first connecting rod continuous rotation, by the hinged transmission of fourth connecting rod and spoiler piece, the swing angle of spoiler piece is naturally limited by the rotation range of first connecting rod, without setting rigid stroke end, allowing rotary drive part continuous rotation, without reversing, avoid the "overshoot phenomenon" of traditional reciprocating motion, eliminate the vibration, wear and tear and control deviation problem caused by overshoot fundamentally.

The constant-temperature water-oil bath pan comprises an equipment box body, a spiral heating rod and a temperature sensor are fixedly installed at the bottom of a stainless steel inner container, a turbulent flow paddle is rotationally connected to the center of the bottom of the stainless steel inner container, and a plurality of supporting lugs are fixedly connected to the inner wall of the stainless steel inner container in an annular array mode. A clamping groove is formed in the surface of the supporting lug, an annular supporting frame is clamped and fixed in the clamping groove, a supporting net is fixedly connected to the inner wall of the annular supporting frame, a liquid discharging pipe communicated with the stainless steel inner container is arranged on the left side of the equipment box body, a control panel is arranged on the surface of the equipment box body, and a heating rod switch, a turbulent flow switch and a temperature rotary knob are arranged on the control panel. Through the arrangement of the supporting lugs, the clamping grooves, the annular supporting frame and the supporting net, the whole annular supporting frame can be conveniently communicated with the supporting net to be disassembled through the mutual clamping relation of the annular supporting frame and the clamping grooves, and therefore convenience is provided for cleaning the spiral heating rod and the interior of the stainless steel inner container.

The application discloses a spoiler assembly for a vehicle and the vehicle, the spoiler assembly comprises a base body, a first air guide and a second air guide, the base body is suitable for being connected with the back of the vehicle body, the base body extends in the width direction, the upper surface of the base body is formed with an air guide surface, the first air guide and the second air guide are symmetrically arranged at the two ends of the base body, at least part of the first air guide and at least part of the second air guide protrude from the air guide surface, the first air guide and the second air guide are arranged in the vehicle width direction, wherein the two side edges of the first air guide and the second air guide towards each other are respectively formed with a first air channel wall and a second air channel wall, the first air channel wall and the second air channel wall are arranged away from each other in the direction close to the air guide surface, a first concave air channel is formed between the first air channel wall and the air guide surface, and a second concave air channel is formed between the second air channel wall and the air guide surface, so that the wind resistance of the vehicle can be further reduced.

The embodiment of the invention provides a simulation method and device for automatic deceleration of a spoiler of a medium-sized propeller-driven aircraft, computer equipment and a medium, and the method comprises the following steps: determining a use scene in which the spoiler of the aircraft needs to be automatically decelerated, according to the use scene of automatic deceleration, flight data needing to be introduced into the simulation system is determined, and the flight data comprises a ground signal, a speed signal, an engine power signal and a spoiler normal working signal; according to the flight data, judging whether an entry condition for starting to use an automatic deceleration function is met, and if yes, unfolding the spoilers on the two sides to the maximum through a simulation system to automatically decelerate the aircraft; and continuously monitoring the flight data until the quit condition of quitting the automatic deceleration function is met, quitting the automatic deceleration, and resetting the double-side spoilers through the simulation system. According to the scheme, a method for automatically decelerating the ground through the spoiler is designed, and the effectiveness of the scheme is verified through simulation.

The application provides a design method of a spoiler pipe structure based on a Karman vortex street theory, the spoiler pipe structure comprising a liquid conveying pipe and a variable-diameter spoiler arranged in the liquid conveying pipe, the variable-diameter spoiler comprising a spoiler spiral wire wound in a liquid flow direction and having a wire diameter d, the design method comprising the following steps: obtaining an initial calculation formula of the wire diameter d according to a Reynolds number calculation formula; obtaining a calculation formula of a fluid inlet pipe flow rate V2 of the liquid conveying pipe according to a flow conservation calculation formula; and obtaining a final calculation formula of the wire diameter d according to a calculation formula among a liquid pump piston speed V1, a motor rotating speed n, an eccentric distance R of an eccentric wheel and a length-diameter ratio λ of a connecting rod. The application can more easily cause vortexes in the two side regions of the spoiler spiral wire along the radial direction of the liquid conveying pipe, and then more easily cause the liquid to mix along the radial direction of the conveying pipe, so that the spoiler efficiency and mixing degree of the oral cavity flushing liquid in the liquid conveying pipe are further improved.

The application provides a fixed-wing aircraft airspeed calibration flight test method based on a standard machine. The method comprises the following steps: determining the weight of the fixed-wing aircraft as a first weight, setting the aircraft to a specified take-off configuration, and taking off according to a take-off procedure; the standard machine flies to a specified airspace according to a plan; at an initial specified flight height, a tow cone is released to a specified length, and the tow cone can obtain an accurate static pressure value in the current area without being affected by a spoiler; the flap and slot wing configuration of the fixed-wing aircraft is set to a first flap and slot wing configuration; the aircraft is trimmed at a given speed; the speed in the above step is set to other speeds within the speed envelope of the first flap and slot wing configuration, and the steps are repeated; the standard machine obtains airspeed errors under the first flap and slot wing configuration and different speeds; and the airspeed errors under the first flap and slot wing configuration and different speeds are fitted to obtain an airspeed correction curve under the first weight, the first flap and slot wing configuration. More accurate airspeed errors can be obtained.

The utility model discloses a storage device with a drying structure, which belongs to the technical field of grass seed storage and comprises an outer tank body, a top cover arranged at the top of the outer tank body, a drying box arranged at the top of the top cover, a fan arranged on one side outside the drying box, an extraction opening arranged on one side of the bottom of the top cover, and a filter screen arranged at one end inside the drying box. A plurality of spoilers are arranged at the other end of the interior of the drying box in a staggered mode, drying bags are arranged on the two sides of each spoiler, air in the inner tank body is extracted through the draught fan and injected into the drying box, the air is filtered through the filter screen and then disturbed through the spoilers, the flowing path of the air is increased, and therefore the contact time of the air and the drying bags is prolonged, and the drying efficiency is improved. The drying bag is used for drying flowing air, and finally the air flows back to the interior of the inner tank body through the exhaust port, so that the drying effect is achieved, an independent space is formed in the inner tank body through the design, and the influence of the external temperature and humidity environment on the interior of the inner tank body is effectively avoided while drying is achieved.

The application belongs to the technical field of heat supply equipment, and provides a regional heat supply mixing tank based on turbulence structure optimization, which comprises a first turbulence component and a second turbulence component arranged in a tank body along a water flow direction; the first turbulence component is located behind a low-temperature water inlet and behind a high-temperature water inlet, and is used for blocking the channel of cold water sticking to the bottom and actively inducing to the middle or upper part of the tank body; the second turbulence component is located in front of a medium-temperature water outlet, and is used for forcibly turning and cutting the mixed fluid about to flow out, so as to realize the thermal deviation homogenization of the mixed fluid. The mixing tank is used for hydraulic decoupling and heat mixing of a primary circuit and a secondary circuit of a heat network, and the internal turbulence structure is additionally arranged and optimized to eliminate the thermal stratification phenomenon in the tank, and then the temperature uniformity of the water outlet is improved.

The invention discloses a rotational flow energy dissipation device of a conical valve, and belongs to the technical field of conical valve energy dissipation. The rotational flow energy dissipation device of the conical valve comprises a fixed cylinder, a movable cylinder is arranged on the outer side of the fixed cylinder, the fixed cylinder and the movable cylinder are connected through an adjusting assembly, and a fixed assembly is arranged in the fixed cylinder; the fixing assembly comprises a conical barrel, a first connecting plate, a fixing rod, a first spiral piece and a limiting ring, a turbulent flow assembly is rotationally arranged on the outer side of the fixing rod, an inner barrel is arranged in the fixing barrel, a spiral side wall is spirally arranged in the middle of the inner barrel, and a first energy dissipation assembly and a second energy dissipation assembly are arranged on the inner side of the fixing barrel. A second spiral piece located between the first energy dissipation assembly and the second energy dissipation assembly is spirally arranged in the fixed cylinder, an air inlet assembly is arranged on the fixed cylinder, and the energy dissipation device has the advantages of multiple efficient energy dissipation, stable drainage, automatic and flexible air supply, reliable structure, simplicity, convenience and practicability.

The invention provides a general gasoline engine carburetor with an intelligent mixing ratio control function, and relates to the technical field of general gasoline engine carburetors. An air disturbance compensation mechanism is arranged in an air inlet channel of the carburetor, and the initial frequency and amplitude of air disturbance are determined by detecting an instantaneous negative pressure signal of the air inlet channel; a reference aerodynamic disturbance model is established according to the current rotating speed of an engine, gas pressure signals are collected in real time through differential pressure sensors arranged on the upstream portion and the downstream portion of an air inlet channel, and the instantaneous gas density change rate is calculated so that the concentration trend of mixed gas can be obtained. The problem that dynamic response of the mixing ratio of an existing carburetor is lagged is effectively solved, when the acceleration of a throttle valve exceeds a threshold value, the system immediately triggers fuel oil to compensate in advance, the angle of a spoiler is adjusted in real time along with the rotating speed, atomization uniformity is remarkably improved, the phenomena of acceleration power interruption and tempering are avoided, and stable combustion and transient response under all working conditions are achieved.

The utility model relates to the technical field of spoilers, and discloses a vehicle rear spoiler device and a vehicle, which comprise a spoiler mechanism and a rear bumper assembly, a containing cavity is formed in the rear bumper assembly, and an opening deviating from a vehicle head is formed in the containing cavity. The spoiler mechanism comprises a driving assembly, a transmission assembly and a spoiler, the driving assembly and the transmission assembly are installed in the containing cavity, the spoiler is in sliding connection with the rear bumper assembly, the driving assembly is in transmission connection with the spoiler through the transmission assembly, and the driving assembly is configured to drive the spoiler to stretch out of the opening and retract into the containing cavity through the transmission assembly. The spoiler extends into and out of the containing cavity in the rear bumper assembly, so that the space of the rear surface of a vehicle is not occupied, the spoiler can be retracted through the driving assembly when the vehicle speed is low, other people are prevented from being hurt, and the technical problems that in the prior art, the rear space of the vehicle is occupied, and pedestrians are prone to being hurt are solved. The technical effects that the space behind the vehicle is not occupied, and serious injury to pedestrians is avoided are achieved.