Commercial vehicle fairing, using method and commercial vehicle

Abstract

The invention relates to the technical field of air deflectors, in particular to a commercial vehicle air deflector, a using method and a commercial vehicle. The air deflector comprises two rear fixed supporting rods and two rear movable supporting rods, and the bottom ends of the two rear fixed supporting rods are both connected with a vehicle top cover; the top ends of the two rear fixed supporting rods are both fixedly connected with the inner wall of the top flow guide plate, and the top ends of the two rear fixed supporting rods are each rotationally connected with one end of one rear movable supporting rod. A rear installation point is arranged on the rear portion of the inner wall of the top flow guide plate, and two middle installation points are arranged in the middle of the inner wall of the top flow guide plate and located in front of the rear installation point. The ends, away from the corresponding rear fixed supporting rods, of the two rear movable supporting rods can be detachably connected with the rear mounting points or the front corresponding middle mounting points. The heat dissipation requirement of the external refrigerator is met, and serious damage to the structural performance of the flow guide cover due to local cutting is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fairings, in particular to a commercial vehicle fairing, a use method and a commercial vehicle. BACKGROUND

[0002] The fairing of the commercial vehicle guides the airflow along the roof to smoothly transition, which can effectively suppress airflow separation, reduce the wind resistance coefficient and reduce fuel costs.

[0003] In the cold chain transportation, medical refrigeration transportation and other sub-sectors, the commercial vehicle needs to be equipped with an external cooling machine (usually installed at the front or middle part of the roof) to maintain a stable low-temperature environment in the cargo compartment. The heat dissipation efficiency of the external cooling machine directly determines the refrigeration performance. When the coverage range of the fairing overlaps with the installation area of the external cooling machine, on the one hand, the closed structure of the fairing will hinder the external airflow directly flowing through the surface of the condenser, resulting in insufficient heat dissipation air volume; on the other hand, the narrow space between the fairing and the cooling machine is easy to form airflow vortex, causing the condenser to heat up, which not only leads to a decrease in refrigeration efficiency, but also triggers the high-pressure protection device of the cooling machine during long-term operation, resulting in frequent shutdown of the cooling machine, and in severe cases, it may cause the cold chain goods to deteriorate, causing significant economic losses to the transportation enterprise.

[0004] To balance the wind resistance optimization function of the fairing and the heat dissipation demand of the external cooling machine, the commonly used solution is to locally cut and modify the fairing, that is, according to the installation size of the external cooling machine, a rectangular or circular opening matching the cooling machine is cut in the corresponding area of the fairing, so that the condenser of the cooling machine is exposed to the airflow to avoid airflow obstruction. However, based on the lightweight design of the fairing, local cutting will damage the structural performance of the fairing, resulting in a decrease in the natural frequency of the fairing and an increased risk of resonance between the fairing and the air compressor and the engine. The commonly used solution is also to open a heat dissipation hole in the area of the fairing corresponding to the cooling machine, which preserves the integrity of the overall structure of the fairing, but the heat dissipation effect is obviously insufficient. SUMMARY

[0005] To solve the technical problem in the prior art that, to balance the wind resistance optimization function of the fairing and the heat dissipation demand of the external cooling machine, local cutting and modification of the fairing will seriously damage the structural performance of the fairing based on the lightweight design of the fairing, resulting in a decrease in the natural frequency of the fairing and an increased risk of resonance between the fairing and the air compressor and the engine, the present application provides a commercial vehicle fairing, a use method and a commercial vehicle.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A commercial vehicle fairing includes a top fairing, with a side fairing connected to each of the two lateral sides of the top fairing. The bottom of both side fairings is connected to the roof of the commercial vehicle. The fairing includes two fixed rear support rods and two movable rear support rods. The bottom ends of the two fixed rear support rods are connected to the roof of the vehicle. The shafts of each fixed rear support rod extend along the inner wall of one of the side fairings to the inner wall of the top fairing. The top ends of both fixed rear support rods are fixedly connected to the inner wall of the top fairing, and each top end of one fixed rear support rod is rotatably connected to one end of a movable rear support rod. The rear of the inner wall of the top fairing has a rear mounting point, and the middle of the inner wall of the top fairing has two central mounting points located in front of the rear mounting points. The ends of the two movable rear support rods furthest from their corresponding fixed rear support rods can be detachably connected to either the rear mounting point or the corresponding central mounting point in front.

[0007] With the above structural design, when no external refrigeration unit is installed, the ends of the two rear movable support rods furthest from the rear fixed support rod are connected to the rear mounting point. The complete structure of the top and side deflectors guides airflow smoothly along the vehicle roof, effectively suppressing airflow separation, reducing drag coefficient, and lowering fuel costs. When an external refrigeration unit is installed on the top of the vehicle roof, the connection between the rear movable support rods and the rear mounting point can be disconnected. After cutting the heat dissipation vents at the rear of the top deflector, the rear movable support rods can be connected to the central mounting point. This satisfies the heat dissipation requirements of the external refrigeration unit while avoiding severe damage to the deflector structure due to partial cutting.

[0008] In this invention, the bottom ends of the two rear fixed support rods are connected to the vehicle roof, and the rods extend along the inner wall of the side guide plate to the inner wall of the top guide plate, with the top ends fixed to the inner wall of the top guide plate, providing stable support for the fairing. At the same time, the rear movable support rods can be connected to different mounting points to rebuild the support structure after cutting the heat dissipation vents, avoiding a decrease in the natural frequency of the fairing and reducing the risk of resonance with the air compressor and engine. This solves the technical problem of damaging the structural performance of the fairing by partially cutting and modifying it in the prior art.

[0009] As a preferred implementation of a commercial vehicle fairing, the bottom ends of the two rear fixed support rods are respectively fixedly connected to a top cover connecting plate, and both top cover connecting plates are fixedly connected to the vehicle top cover.

[0010] With the above structural scheme, the bottom ends of the two rear fixed support rods are fixedly connected with one top cover connecting plate I respectively, and the top cover connecting plate I is fixedly connected with the vehicle top cover, thereby improving the firmness of the connection between the rear fixed support rod and the vehicle top cover, and further enhancing the installation stability of the entire fairing on the vehicle top cover, avoiding loosening of the connection between the rear fixed support rod and the vehicle top cover due to vibration during vehicle driving, and ensuring that the fairing stably plays the function of wind resistance optimization or cooperation with external cooling machine heat dissipation for a long time.

[0011] As a preferred implementation manner of the commercial vehicle fairing, each top cover connecting plate I is fixedly connected with the corresponding side deflector plate.

[0012] With the above structural scheme, each top cover connecting plate I is fixedly connected with the corresponding side deflector plate in addition to being fixedly connected with the vehicle top cover, so that the top cover connecting plate I simultaneously plays a connecting and fixing role on the rear fixed support rod, the vehicle top cover and the side deflector plate, forming a multi-node stable connection structure of “vehicle top cover-top cover connecting plate I-side deflector plate-rear fixed support rod-top deflector plate”, further improving the structural strength and stability of the fairing as a whole, reducing the relative displacement between the components of the fairing during vehicle driving, reducing the noise and structural damage risk caused by loosening of the components, and prolonging the service life of the fairing.

[0013] As a preferred implementation manner of the commercial vehicle fairing, it further comprises two middle fixed support rods, the two middle fixed support rods are located in front of the two rear fixed support rods, the bottom ends of the two middle fixed support rods are fixedly connected with the inner walls of the side deflector plates respectively, and the rod bodies of the two middle fixed support rods extend along the inner walls of the corresponding side deflector plates to the inner wall of the top deflector plate.

[0014] With the above structural scheme, the two middle fixed support rods are arranged in front of the two rear fixed support rods, and the bottom ends of the middle fixed support rods are fixedly connected with the inner walls of the side deflector plates, and the rod bodies extend along the inner walls of the side deflector plates to the inner wall of the top deflector plate, thereby providing additional support for the middle region of the fairing, making the overall support structure of the fairing more uniform, improving the anti-deformation ability of the fairing, and effectively resisting the impact force of the airflow on the middle part of the top deflector plate, especially during high-speed driving of the vehicle, thereby avoiding the middle part of the top deflector plate from being depressed or bent due to excessive force, ensuring the streamline structure of the fairing and maintaining the wind resistance optimization effect.

[0015] As a preferred implementation manner of the commercial vehicle fairing, one end of the middle fixed support rod extending to the inner wall of the top deflector plate is fixedly connected with one middle mounting point.

[0016] With the above structural scheme, the two middle fixed support rods are fixedly connected with the corresponding middle mounting points at one end of the inner wall of the top deflector plate, which on the one hand makes the connection of the middle fixed support rods and the top deflector plate more accurate and firm, and further enhances the support stability of the middle part of the top deflector plate; on the other hand, when the middle mounting points are used to connect the rear movable support rods (i.e. after the installation of the external cooling machine cutting heat dissipation port), the middle fixed support rods can provide a stable support base for the rear movable support rods through the middle mounting points, so that the support force of the rear movable support rods on the top deflector plate can be transmitted to the side deflector plate through the middle fixed support rods, forming a more stable force transmission path, avoiding damage of the middle mounting points due to excessive stress, and ensuring the structural stability of the deflector cover behind the cutting heat dissipation port.

[0017] As a preferred implementation of the commercial vehicle deflector cover, it further comprises a front fixed support rod, the front fixed support rod is located in front of the two rear fixed support rods, the two ends of the front fixed support rod are fixedly connected with the inner wall of one side deflector plate respectively, the rod body of the front fixed support rod extends along the inner wall of the side deflector plate and the top deflector plate, and the front fixed support rod is fixedly connected with the inner wall of the top deflector plate.

[0018] With the above structural scheme, the front fixed support rod is located in front of the two rear fixed support rods, the two ends of the front fixed support rod are fixedly connected with the inner wall of the side deflector plate, the rod body of the front fixed support rod extends along the inner wall of the side deflector plate and the top deflector plate and is fixedly connected with the inner wall of the top deflector plate, which provides a transverse support structure for the front part of the deflector cover, fills the blank of the front support of the deflector cover, improves the overall structural strength of the deflector cover, and avoids structural vibration and noise caused by airflow impact on the front part of the deflector cover.

[0019] As a preferred implementation of the commercial vehicle deflector cover, the two ends of the front fixed support rod are fixedly connected with two top cover connecting plates II respectively, the two top cover connecting plates II are fixedly connected with the corresponding side deflector plates respectively, and the two top cover connecting plates II are fixedly connected with the vehicle top cover.

[0020] With the above structural scheme, the two ends of the front fixed support rod are fixedly connected with the corresponding side deflector plates and the vehicle top cover through the top cover connecting plates II, which on the one hand increases the connection contact area of the front fixed support rod with the side deflector plates and the vehicle top cover, improves the firmness of the connection of the front fixed support rod with the side deflector plates and the vehicle top cover, and avoids loosening of the front fixed support rod due to vehicle vibration or airflow impact; on the other hand, the top cover connecting plates II simultaneously connect the vehicle top cover, the side deflector plates and the front fixed support rod, further perfecting the connection structure of the deflector cover and the vehicle top cover, making the connection of the front part of the deflector cover and the vehicle more stable, reducing the shaking of the front part of the deflector cover during driving, ensuring the overall structural stability of the deflector cover, and long-term functional performance.

[0021] As a preferred implementation of the fairing of the commercial vehicle, the top deflector plate is inclined, and the front of the top deflector plate is close to the vehicle roof, and the rear of the top deflector plate is away from the vehicle roof.

[0022] With the above structure, the top deflector plate is inclined, and the front is close to the vehicle roof and the rear is away from the vehicle roof. The inclined structure is more in line with the principle of aerodynamics, can guide the airflow to smoothly transition from the front of the vehicle along the top deflector plate, minimize the separation of airflow on the surface of the top deflector plate, significantly reduce the drag coefficient, and further reduce the fuel consumption of the vehicle. At the same time, the inclined structure makes the rear of the top deflector plate have more space. When the external cooling machine is installed and the cooling port is cut, the design of the rear away from the vehicle roof can avoid the external cooling machine being too close to the rear of the top deflector plate, provide more airflow flow space for the external cooling machine to dissipate heat, improve the heat dissipation efficiency, and avoid the problem of insufficient heat dissipation due to the small space.

[0023] A technical scheme of a method for using the fairing of the commercial vehicle is as follows: A method for using the fairing of the commercial vehicle is suitable for the fairing of the commercial vehicle in any one of the above embodiments, and includes the following steps: When the external cooling machine is arranged on the top of the vehicle roof, the connection between the two rear movable support rods and the rear mounting points is disconnected, and the connection between each rear movable support rod and the corresponding rear fixed support rod is retained; The rear of the top deflector plate is partially cut to form a cooling port; The ends of the two rear movable support rods away from the corresponding rear fixed support rods are respectively connected to the corresponding front middle mounting points.

[0024] By disconnecting and reconnecting the rear movable support rods, the cooling port is cut to meet the heat dissipation requirements of the external cooling machine, and the support structure is reconstructed by connecting the rear movable support rods and the middle mounting points, so as to avoid the performance degradation of the modified fairing, ensure that the modified fairing can efficiently dissipate heat of the external cooling machine, and maintain sufficient structural stability, thereby solving the contradictory problem of the weak structure or insufficient heat dissipation of the modified fairing in the prior art.

[0025] A technical scheme of a commercial vehicle is as follows: A commercial vehicle includes a vehicle roof and a fairing of the commercial vehicle in any one of the above embodiments.

[0026] The commercial vehicle can flexibly adjust the fairing state according to the actual transportation demand (such as whether to transport cold chain goods, whether to install an external cooling machine), without the need to install an external cooling machine, the fairing plays an excellent wind resistance optimization role, reduces fuel cost, when an external cooling machine is needed, the fairing can be modified to meet the heat dissipation demand of the external cooling machine, ensure the low-temperature environment during the transportation of cold chain goods, avoid the deterioration of goods, improve the adaptability and practicality of the commercial vehicle in different transportation scenarios, especially suitable for cold chain transportation, medical refrigerated product transportation and other sub-sectors, expand the application range of the commercial vehicle, and improve its market competitiveness.

[0027] The beneficial effects of the present application include: When the external cooling machine is not installed, the two rear movable support rods are connected to the rear mounting point away from the end of the rear fixed support rod, the airflow can be guided to smoothly transition along the vehicle roof through the complete structure of the top fairing and the side fairing, effectively inhibiting airflow separation, reducing the wind resistance coefficient, and reducing fuel cost. When the vehicle roof top is provided with an external cooling machine, the connection between the rear movable support rod and the rear mounting point can be disconnected, a heat dissipation opening is cut at the rear of the top fairing, and then the rear movable support rod is connected to the middle mounting point, which not only meets the heat dissipation demand of the external cooling machine, but also avoids the serious damage to the structure performance of the fairing caused by local cutting.

[0028] In the present application, the bottom ends of the two rear fixed support rods are connected to the vehicle roof, the rod body extends along the inner wall of the side fairing to the inner wall of the top fairing, and the top end is fixed to the inner wall of the top fairing, which provides stable support for the fairing. At the same time, the rear movable support rod can be connected to different mounting points to rebuild the support structure after cutting the heat dissipation opening, avoid the decrease of the inherent frequency of the fairing, reduce the risk of resonance with the air compressor and the engine, and solve the technical problem of damage to the structure performance of the fairing caused by local cutting in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 It is a top view structural schematic diagram of a fairing of a commercial vehicle in the specific embodiment of the present application. Figure 2 It is a front view structural schematic diagram of a fairing of a commercial vehicle in the specific embodiment of the present application. Figure 3 It is a side view structural schematic diagram of a fairing of a commercial vehicle in the specific embodiment of the present application. Figure 4Figure 1 is a top view of a commercial vehicle after cutting a heat dissipation opening in a fairing according to an embodiment of the present application.

[0031] List of components and reference numerals: 1, top deflector; 2, side deflector; 3, rear fixed support rod; 4, rear movable support rod; 5, rear mounting point; 6, middle mounting point; 7, top cover connecting plate one; 8, middle fixed support rod; 9, front fixed support rod; 10, top cover connecting plate two; 11, heat dissipation opening. DETAILED DESCRIPTION

[0032] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] When a commercial vehicle is equipped with an external cooling machine to maintain a stable low-temperature environment in the cargo compartment, the heat dissipation efficiency of the external cooling machine directly determines the refrigeration performance. When the coverage range of the fairing overlaps with the installation area of the external cooling machine, on the one hand, the closed structure of the fairing will hinder the external airflow from directly flowing through the surface of the condenser, resulting in insufficient heat dissipation air volume; on the other hand, the narrow space between the fairing and the cooling machine is easy to form airflow vortex, causing the condenser to heat up, which not only leads to a decrease in refrigeration efficiency, but also triggers the high-pressure protection device of the cooling machine during long-term operation, resulting in frequent shutdown of the cooling machine, and in severe cases, it may cause the deterioration of cold chain goods, causing significant economic losses to the transportation enterprise.

[0034] In order to balance the wind resistance optimization function of the fairing and the heat dissipation demand of the external cooling machine, the commonly used solution is to locally cut and modify the fairing, that is, according to the installation size of the external cooling machine, a rectangular or circular opening matching the cooling machine is cut in the corresponding area of the fairing, so that the condenser of the cooling machine is exposed to the airflow to avoid airflow obstruction. However, based on the lightweight design of the fairing, local cutting will damage the structural performance of the fairing, resulting in a decrease in the natural frequency of the fairing and an increase in the risk of resonance between the fairing and the air compressor and the engine. The commonly used solution also has a heat dissipation hole in the area of the fairing corresponding to the cooling machine, which retains the integrity of the overall structure of the fairing, but the heat dissipation effect is obviously insufficient.

[0035] In order to solve the technical problem in the prior art that in order to balance the wind resistance optimization function of the fairing and the heat dissipation demand of the external cooling machine, after locally cutting and modifying the fairing, based on the lightweight design of the fairing, the structural performance of the fairing is seriously damaged, resulting in a decrease in the natural frequency of the fairing and an increase in the risk of resonance between the fairing and the air compressor and the engine, with reference toFigure 1 The embodiment provides a commercial vehicle fairing, which comprises a top fairing plate 1, which is combined with Figure 3 The top fairing plate 1 is arranged in an inclined manner, the front part of the top fairing plate 1 is close to a vehicle roof, and the rear part of the top fairing plate 1 is away from the vehicle roof of the commercial vehicle. The lateral sides of the top fairing plate 1 are connected with a side fairing plate 2 respectively, and the bottom parts of the two side fairing plates 2 are connected with the vehicle roof. The lateral midpoint of the rear part of the inner wall of the top fairing plate 1 is provided with a rear mounting point 5, and the middle part of the inner wall of the top fairing plate 1 is provided with two lateral symmetrical middle mounting points 6, and the two middle mounting points 6 are located in front of the rear mounting point 5.

[0036] Referring to Figures 1-3 The commercial vehicle fairing provided by the embodiment further comprises two rear fixed support rods 3, two rear movable support rods 4, two middle fixed support rods 8, a front fixed support rod 9, two roof connecting plates one 7 and two roof connecting plates two 10. The front fixed support rod 9, the middle fixed support rod 8 and the rear fixed support rod 3 are arranged in sequence from front to back, and the two rear movable support rods 4 are located between the two rear fixed support rods 3. The two rear fixed support rods 3 are arranged in a symmetrical manner in the lateral direction, the two rear movable support rods 4 are arranged in a symmetrical manner in the lateral direction, the two middle fixed support rods 8 are arranged in a symmetrical manner in the lateral direction, the two roof connecting plates one 7 are arranged in a symmetrical manner in the lateral direction, and the two roof connecting plates two 10 are arranged in a symmetrical manner in the lateral direction. The top parts of the two rear fixed support rods 3 and the two middle fixed support rods 8 are inclined rearward, and the top part of the front fixed support rod 9 is inclined forward.

[0037] The bottom ends of the two rear fixed support rods 3 are fixedly connected with a roof connecting plate one 7 respectively, the two roof connecting plates one 7 are fixedly connected with the vehicle roof, and each roof connecting plate one 7 is fixedly connected with a corresponding side fairing plate 2. The rod bodies of the two rear fixed support rods 3 extend along the inner walls of the two side fairing plates 2 to the inner wall of the top fairing plate 1 respectively. The top ends of the two rear fixed support rods 3 are fixedly connected with the inner wall of the top fairing plate 1, and the top ends of the two rear fixed support rods 3 are rotatably connected with one end of a rear movable support rod 4 respectively.

[0038] Referring to Figure 1 and Figure 4Each of the two rear movable support rods 4, at the end furthest from the corresponding rear fixed support rod 3, can be detachably connected to the rear mounting point 5 or the corresponding front middle mounting point 6. When no external refrigeration unit is installed, the ends of the two rear movable support rods 4 furthest from the rear fixed support rod 3 are connected to the rear mounting point 5. The complete structure of the top guide plate 1 and the side guide plates 2 guides the airflow smoothly along the vehicle roof, effectively suppressing airflow separation, reducing the drag coefficient, and decreasing fuel costs. When an external refrigeration unit is installed on the top of the vehicle roof, the connection between the rear movable support rods 4 and the rear mounting point 5 can be disconnected. After cutting the heat dissipation vent 11 at the rear of the top guide plate 1, the rear movable support rods 4 can be connected to the middle mounting point 6. This satisfies the heat dissipation requirements of the external refrigeration unit while avoiding severe damage to the shroud structure due to partial cutting.

[0039] The bottom ends of the two central fixed support rods 8 are each fixedly connected to the inner wall of a side guide plate 2. The rods of the two central fixed support rods 8 extend along the inner wall of the corresponding side guide plate 2 to the inner wall of the top guide plate 1. One end of the two central fixed support rods 8 extending to the inner wall of the top guide plate 1 (i.e., the top ends of the two central fixed support rods 8) is fixedly connected to a central mounting point 6. Two central fixed support rods 8 are installed in front of the two rear fixed support rods 3, and the bottom end of the central fixed support rods 8 is fixed to the inner wall of the side guide plate 2. The rod body extends along the inner wall of the side guide plate 2 to the inner wall of the top guide plate 1, providing additional support for the central area of ​​the fairing, making the overall support structure of the fairing more uniform, and improving the fairing's resistance to deformation. Especially when the vehicle is traveling at high speed, it can effectively resist the impact of airflow on the central part of the top guide plate 1, preventing the central part of the top guide plate 1 from being dented or bent due to excessive force, ensuring the streamlined structure of the fairing, and maintaining the wind resistance optimization effect.

[0040] Both ends of the front fixed support rod 9 are fixedly connected to a top cover connecting plate 2 10. Both top cover connecting plates 2 10 are fixedly connected to the corresponding side guide plates 2, and both top cover connecting plates 2 10 are fixedly connected to the vehicle top cover. The rod body of the front fixed support rod 9 extends along the inner wall of the side guide plate 2 and the top guide plate 1, and the front fixed support rod 9 is fixedly connected to the inner wall of the top guide plate 1. The front fixed support rod 9, with both ends fixed to the inner wall of the side guide plate 2 and the rod body extending along the inner wall of the side guide plate 2 and the top guide plate 1 and fixed to the inner wall of the top guide plate 1, provides a transversely continuous support structure for the front area of ​​the fairing, filling the support gap at the front of the fairing, improving the overall structural strength of the fairing, and preventing structural vibration and noise caused by airflow impacting the front of the fairing.

[0041] This embodiment also proposes a method for using a commercial vehicle fairing, which is applicable to a commercial vehicle fairing in this embodiment, and includes the following steps: When an external refrigeration unit is installed on top of the vehicle roof, refer to Figure 4, disconnecting the connection between the two rear movable support rods 4 and the rear mounting points 5, retaining the connection between each rear movable support rod 4 and the corresponding rear fixed support rod 3; partially cutting the rear part of the top deflector 1 to cut out the heat dissipation opening 11; connecting the ends of the two rear movable support rods 4 away from the corresponding rear fixed support rods 3 to the corresponding front middle mounting points 6 respectively.

[0042] By disconnecting and reconnecting the rear movable support rods 4, the cutting of the heat dissipation opening 11 meets the external cooling machine heat dissipation requirement, and the support structure is reconstructed by the connection between the rear movable support rods 4 and the middle mounting points 6, avoiding the performance degradation of the modified flow cover structure, ensuring that the modified flow cover can efficiently dissipate heat for the external cooling machine and maintain sufficient structural stability, solving the contradictory problem of the weak structure or insufficient heat dissipation of the modified flow cover in the prior art.

[0043] The embodiment also provides a commercial vehicle including a vehicle roof and the commercial vehicle flow cover in the embodiment.

[0044] The commercial vehicle can flexibly adjust the flow cover state according to the actual transportation requirement (such as whether to transport cold chain goods or whether to install an external cooling machine): when the external cooling machine is not installed, the flow cover plays an excellent role in wind resistance optimization, reducing fuel costs; when the external cooling machine is installed, the flow cover can meet the heat dissipation requirement of the external cooling machine through modification, ensuring the low-temperature environment during the transportation of cold chain goods, avoiding the deterioration of goods, and improving the adaptability and practicality of the commercial vehicle in different transportation scenarios, especially suitable for the sub-sectors of cold chain transportation and medical refrigeration transportation, expanding the application range of the commercial vehicle and improving its market competitiveness.

[0045] The working principle of the commercial vehicle flow cover provided in the embodiment is as follows: The commercial vehicle flow cover in the embodiment realizes the dual functions of reducing wind resistance when there is no external cooling machine and preserving heat dissipation and structural stability when there is an external cooling machine through the design of the modular support structure and the switchable connection mode.

[0046] When the vehicle does not need to install an external cooling machine (such as ordinary goods transportation), the flow cover guides the airflow in the form of a complete streamlined structure, and at the same time, a stable support system is constructed by multiple groups of support rods, and the core principle is as follows: The top deflector 1 adopts an inclined design of "the front part close to the vehicle roof and the rear part away from the vehicle roof", which completely conforms to the principle of aerodynamics. When the vehicle is running, the airflow enters from the front and smoothly transitions upward along the inclined surface of the top deflector 1, avoiding the formation of vortex or separation zone at the junction of the roof and the deflector; the side deflectors 2 on both sides simultaneously guide the side airflow of the vehicle body, reducing the impact of the transverse airflow on the vehicle body. Through the coordinated deflection of the top and sides of the flow cover, the wind resistance coefficient of the whole vehicle is effectively reduced, ultimately reducing fuel consumption, meeting the energy-saving needs of commercial vehicles.

[0047] In this scenario, the rear movable support rod 4 is detachably connected to the rear mounting point 5 away from one end of the rear fixed support rod 3, forming a "full support frame", and the specific support path includes: 1. The bottom ends of the two rear fixed support rods 3 are connected through the top cover connecting plate one 7, and are fixed with the vehicle top cover and side deflector 2, and the rod body extends along the inner wall of the side deflector 2 to the inner wall of the top deflector 1 and is fixed; the two ends of the rear movable support rod 4 are connected to the top end of the rear fixed support rod 3 and the rear mounting point 5, respectively, forming a "triangular stable structure" to provide rigid support for the rear of the top deflector 1, resisting the lifting force of the airflow on the rear of the deflector.

[0048] 2. The bottom ends of the two middle fixed support rods 8 are fixed to the inner wall of the side deflector 2, and the rod body extends to the inner wall of the top deflector 1 and is fixed to the middle mounting point 6, filling the support gap in the middle of the top deflector 1, avoiding the deflector from being concave in the middle due to airflow impact at high speed.

[0049] 3. The two ends of the front fixed support rod 9 are connected through the top cover connecting plate two 10, and are fixed with the vehicle top cover and side deflector 2, and the rod body extends along the inner wall of the side deflector 2 and the top deflector 1 and is fixed, forming a transversely through front support, reducing the vibration impact of the airflow on the front of the deflector.

[0050] 4. The top cover connecting plate one 7 (connecting the vehicle top cover, side deflector 2, rear fixed support rod 3) and the top cover connecting plate two 10 (connecting the vehicle top cover, side deflector 2, front fixed support rod 9) form a multi-node connection of "vehicle-deflector cover", avoiding relative displacement between components, further improving the overall structural stability.

[0051] When the vehicle needs to install an external cooling machine (such as cold chain transportation), a heat dissipation port 11 needs to be cut in the rear of the top deflector 1 to ensure the cooling of the cooling machine, and the support structure is reconstructed by switching the connection of the rear movable support rod 4 to avoid structural failure after cutting, and the core principle is as follows: 1. The external cooling machine is installed on the top of the vehicle top cover (usually in the middle area), and its condenser needs to be exposed to the airflow to ensure the cooling efficiency. At this time, the function switching is realized by the following steps: (1) Disconnect the connection between the rear movable support rod 4 and the rear mounting point 5, and keep the rotating connection between the top end of the rear fixed support rod 3, leaving space for cutting the rear of the top deflector 1; (2) According to the size of the condenser of the external cooling machine, a matching heat dissipation port 11 is cut in the rear of the top deflector 1, so that the condenser is directly exposed to the airflow, avoiding the insufficient air flow caused by the shielding of the deflector cover; (3) After cutting, the rear movable support rod 4 is connected to the corresponding middle mounting point 6 in front of the rear fixed support rod 3, and the reconstruction of the support structure is completed.

[0052] 2. After cutting the heat dissipation port 11, the structural integrity of the rear part of the top deflector 1 is destroyed, and if the support is not reconstructed, it is easy to cause the inherent frequency of the deflector to decrease, increasing the risk of resonance with the air compressor and the engine. The present solution reconstructs the support system through the connection switching of the rear movable support rod 4, and the specific principle includes: (1) After the rear movable support rod 4 is connected to the middle mounting point 6, the support force is transmitted to the middle fixed support rod 8 through the middle mounting point 6, and then to the side deflector 2 or the vehicle roof through the middle fixed support rod 8, forming a complete force transmission path of "rear movable support rod 4, middle mounting point 6, middle fixed support rod 8, side deflector 2 or vehicle roof", replacing the single support of the original rear movable support rod 4 and making up for the loss of structural strength in the cutting area.

[0053] (2) The front fixed support rod 9, the middle fixed support rod 8 and the reconstructed rear support (rear fixed support rod 3 and rear movable support rod 4) form a "front-middle-rear" cooperative support, ensuring that the overall rigidity of the deflector does not decrease significantly due to local cutting, effectively maintaining its inherent frequency and reducing the risk of resonance with the vehicle power components (air compressor and engine), avoiding structural damage or noise caused by long-term operation.

[0054] (3) The cut heat dissipation port 11 is only located at the rear part of the top deflector 1, and the front and middle parts still maintain the complete streamline structure, which can continue to guide the smooth transition of the front airflow, minimizing the impact of cutting on the wind resistance optimization function, and achieving the balance between "heat dissipation demand" and "energy saving demand".

[0055] In the prior art, there is an inherent contradiction between "cutting the deflector for heat dissipation" and "maintaining structural stability", i.e. cutting will destroy the structural integrity, and not cutting will not meet the heat dissipation requirement. The present embodiment breaks this contradiction through the switchable connection design of the rear movable support rod 4: When not cut, the rear movable support rod 4 is connected to the rear mounting point 5, ensuring structural integrity and wind resistance optimization; After cutting, the rear movable support rod 4 is connected to the middle mounting point 6, and the force transmission path is reconstructed using the preset support point of the middle fixed support rod 8, which not only retains the ventilation function of the heat dissipation port 11, but also avoids structural performance failure.

[0056] At the same time, the cooperative design of multiple support rods and the roof connecting plate further strengthens the connection stability of "vehicle-deflector", ensuring that the deflector can work reliably in both scenarios and adapt to the multi-purpose transportation needs of commercial vehicles.

[0057] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A commercial vehicle fairing, comprising a top fairing (1), with a side fairing (2) connected to each of the lateral sides of the top fairing (1), the bottoms of the two side fairings (2) being connected to the roof of the commercial vehicle, characterized in that, It includes two rear fixed support rods (3) and two rear movable support rods (4). The bottom ends of the two rear fixed support rods (3) are connected to the vehicle roof. The rods of the two rear fixed support rods (3) extend along the inner wall of a side guide plate (2) to the inner wall of the top guide plate (1). The top ends of the two rear fixed support rods (3) are fixedly connected to the inner wall of the top guide plate (1). The top ends of the two rear fixed support rods (3) are rotatably connected to one end of a rear movable support rod (4). The rear part of the inner wall of the top guide plate (1) is provided with a rear mounting point (5), and the middle part of the inner wall of the top guide plate (1) is provided with two middle mounting points (6). The two middle mounting points (6) are located in front of the rear mounting point (5). The ends of the two rear movable support rods (4) away from the corresponding rear fixed support rods (3) can be detachably connected to the rear mounting point (5) or the corresponding middle mounting point (6) in front.

2. A commercial vehicle fairing according to claim 1, characterized in that, The bottom ends of the two rear fixed support rods (3) are respectively fixedly connected to a top cover connecting plate (7), and both top cover connecting plates (7) are fixedly connected to the vehicle top cover.

3. A commercial vehicle fairing according to claim 2, characterized in that, Each top cover connecting plate (7) is fixedly connected to the corresponding side guide plate (2).

4. A commercial vehicle fairing according to claim 1, characterized in that, It also includes two central fixed support rods (8), which are located in front of the two rear fixed support rods (3). The bottom ends of the two central fixed support rods (8) are fixedly connected to the inner wall of a side guide plate (2). The rods of the two central fixed support rods (8) extend along the inner wall of the corresponding side guide plate (2) to the inner wall of the top guide plate (1).

5. A commercial vehicle fairing according to claim 4, characterized in that, Two central fixed support rods (8) extend to one end of the inner wall of the top guide plate (1) and are fixedly connected to a central mounting point (6).

6. A commercial vehicle fairing according to claim 1, characterized in that, It also includes a front fixed support rod (9), which is located in front of the two rear fixed support rods (3). The two ends of the front fixed support rod (9) are fixedly connected to the inner wall of a side guide plate (2). The rod body of the front fixed support rod (9) extends along the inner wall of the side guide plate (2) and the top guide plate (1). The front fixed support rod (9) is fixedly connected to the inner wall of the top guide plate (1).

7. A commercial vehicle fairing according to claim 6, characterized in that, The two ends of the front fixed support rod (9) are respectively fixedly connected to a top cover connecting plate (10), and both top cover connecting plates (10) are fixedly connected to the corresponding side guide plate (2), and both top cover connecting plates (10) are fixedly connected to the vehicle top cover.

8. A commercial vehicle fairing according to claim 1, characterized in that, The top deflector (1) is set at an angle, with the front part of the top deflector (1) close to the vehicle roof and the rear part of the top deflector (1) away from the vehicle roof.

9. A method of using a fairing for a commercial vehicle, characterized in that, A commercial vehicle fairing according to any one of claims 1-8, comprising the following steps: When an external refrigeration unit is installed on the top of the vehicle roof, disconnect the connection between the two rear movable support rods (4) and the rear mounting point (5), and retain the connection between each rear movable support rod (4) and the corresponding rear fixed support rod (3); Make a partial cut at the rear of the top guide plate (1) to cut out the heat dissipation port (11). Connect the ends of the two rear movable support rods (4) away from the corresponding rear fixed support rods (3) to the corresponding front middle mounting points (6).

10. A commercial vehicle, characterized in that, Includes a vehicle roof and a commercial vehicle fairing as described in any one of claims 1-8.

Images