Front face shield of heavy truck

Abstract

The invention discloses a front face shield of a heavy truck, which comprises a composite middle plate, the length direction of the composite middle plate is horizontal, the composite middle plate rotates on a truck body, the rotation axis is horizontal, and the composite middle plate is provided with a locking piece for locking the composite middle plate on the truck body; the composite end plates are vertically arranged at the two ends of the composite middle plate respectively and rotate on the vehicle body, the rotation axis is consistent with the height direction of the composite end plates, one end of a rotation path is a fastening position, and the other end of the rotation path is a fastening position; the composite end plate is clamped between the automobile body and the composite middle plate locked by the locking piece, and the outer surface of the composite end plate and the outer surface of the composite middle plate are combined to form the outer surface of the radiator grille. The front face shield of the heavy truck is divided into the composite middle plate and the two composite end plates, the composite middle plate is opened and closed in an up-down rotating mode, the composite end plates are opened and closed in a horizontal rotating mode, interference is avoided, opening and closing of the front face shield are facilitated, operation intensity is relieved, meanwhile, additional complex structures do not need to be arranged, cost is reduced, and attractiveness of the heavy truck is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, in particular to a front cover of a heavy truck. Background Art

[0002] The front hood of a heavy truck is usually installed in the center of the front face of the cab, specifically below the front windshield, above the bumper, and between the left and right doors. As the outermost cover of the heavy truck cab, the front hood is integrated with the cab side panels and bumper, and can protect and shield key components such as the engine and radiator, and cooperate with the cooling grille to facilitate ventilation and heat dissipation of the engine. At the same time, the front hood is made of impact-resistant material, which helps to improve the vehicle's aerodynamic performance while ensuring safety performance, and improves driving stability and fuel economy to a certain extent.

[0003] The driver needs to open the front hood for daily maintenance (such as adding coolant, engine oil or cleaning the insect screen). When repairing the engine or flipping the front of the car, the driver also needs to open the front hood to avoid interference with the bumper during flipping. In the prior art, the front hoods of heavy trucks disclosed in the Chinese utility model patents with announcement numbers CN204641639U, CN213007951U, and CN217623455U are all one-piece structures with a large overall weight, usually more than 25 kilograms. At the same time, in order to solve the interference between the front hood and the car body when it is opened, it is necessary to divide the upper corners on the left and right sides, or use a hinge with a four-bar linkage mechanism to solve the interference problem through more complex actions.

[0004] Based on the above factors, the front cover of heavy trucks in the prior art has a large overall weight, is laborious to open and close, requires high work intensity, and has a complex structure to avoid interference problems, which increases costs and affects the overall aesthetics of the heavy truck.

[0005] Therefore, it is necessary to improve the front cover of the heavy truck in the prior art. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects in the prior art and provide a front cover of a heavy truck which reduces the opening and closing strength, facilitates operation, simplifies the complexity of related components, reduces costs and ensures overall aesthetics.

[0007] In order to achieve the above technical effects, the technical solution of the present invention is: a front cover of a heavy truck, comprising: The composite middle plate is horizontal in length direction and rotates on the vehicle body with the axis of rotation being horizontal. The composite middle plate is provided with a locking member for locking it on the vehicle body; The composite end plates are respectively vertically arranged at the two ends of the composite middle plate and rotated on the vehicle body. The rotation axis is consistent with its own height direction. One end of the rotation path is a fastening position. In the fastening position, the composite end plate is clamped between the vehicle body and the composite middle plate locked by the locking member, and the outer surface of the composite end plate is combined with the outer surface of the composite middle plate to form the outer surface of the front mask.

[0008] Preferably, in order to further facilitate the opening and closing of the composite middle plate, the circumferential outer edge of the composite middle plate includes a rotating wall and a locking wall distributed along its own width direction and respectively adjacent to the rotation axis of the composite middle plate and the locking member; in the locked state, the rotating wall is located below the locking wall.

[0009] Preferably, in order to facilitate the opening and closing of the composite middle plate and the composite end plate and to ensure the locking strength of the composite middle plate and the composite end plate, the locking member is a buckle provided on the inner surface of the composite middle plate.

[0010] Preferably, in order to avoid collision between the composite middle plate and the composite end plate and reduce the gap between them, thereby reducing wind resistance during driving of the heavy truck, the composite end plate is sealed and connected to the composite middle plate locked by the locking member through an elastic sealing strip in the fastened position.

[0011] Preferably, in order to ensure the structural strength of the composite middle plate, the composite middle plate includes a middle panel and a middle frame connected to each other, and the outer surface of the middle panel is the outer surface of the composite middle plate.

[0012] Preferably, in order to strengthen the connection strength between the middle panel and the middle frame, the middle panel is fixedly connected to the middle frame by screws.

[0013] Preferably, in order to facilitate certain deformation and buffering of the middle panel after being subjected to pressure, a mounting boss is provided on a surface of the middle panel adjacent to the middle frame, for the screw to be screwed in and for a gap to exist between the inner surface of the middle frame and the middle panel.

[0014] Preferably, in order to further facilitate the opening and closing of the front cover, the middle panel and the middle frame are rotatably connected and the relative rotation axis is parallel to the rotation axis of the composite middle panel.

[0015] Preferably, in order to facilitate maintenance and reduce replacement costs, a rotation joint is provided between the middle panel and the middle frame, and the rotation joint comprises a first rotation seat and a second rotation seat which are detachably rotatably connected.

[0016] Preferably, in order to facilitate the opening and closing of the composite middle plate and improve the convenience of operation, the middle frame is magnetically connected to the vehicle body.

[0017] To sum up, compared with the prior art, the front cover of the heavy-duty truck of the present invention is divided into a composite middle plate and two composite end plates. The composite middle plate adopts an up and down rotating opening and closing method, and the composite end plates adopt a horizontal rotating opening and closing method to avoid interference, facilitate the opening and closing of the front cover to reduce the operating intensity, and there is no need to set up additional complex structures, thereby reducing costs and ensuring the aesthetics of the heavy truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the first embodiment; Figure 2 yes Figure 1 Explosion diagram of Figure 3 is a structural schematic diagram of the first embodiment from another perspective; Figure 4 yes Figure 3 Explosion diagram of Figure 5 yes Figure 4 A magnified view of part A; Figure 6 is a schematic structural diagram of a composite middle plate of a second embodiment; Figure 7 yes Figure 6 Explosion diagram of Figure 8 yes Figure 7 Schematic diagram of the explosion from another perspective; Fig. 9 is a schematic structural diagram of the skeleton in the second embodiment; Fig.10 is a schematic structural diagram of a rotary joint according to a second embodiment; Fig.11 yes Fig.10 Explosion diagram of Fig.12 is a schematic diagram of the structure of the second embodiment when opened and closed; In the figure: 1. composite middle plate; 11. middle panel; 111. rotating wall; 112. locking wall; 113. docking wall; 114. mounting boss; 12. middle frame; 121. receiving groove; 13. locking piece; 14. ventilation hole; 2. composite end plate; 21. end panel; 22. end frame; 3. sealing strip; 4. rotating joint; 41. first rotating seat; 411. fixing plate; 412. fixing seat; 42. second rotating seat; 43. bolt; 44. first nut; 45. screw; 46. second nut; 5. hinge. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0020] First embodiment

[0021] like Figure 1-Figure 5 As shown, a front cover of a heavy truck according to a first embodiment of the present invention comprises: The composite middle plate 1 is horizontal in length direction and rotates on the vehicle body with the axis of rotation being horizontal. The composite middle plate 1 is provided with a locking member 13 for locking it on the vehicle body. The composite end plates 2 are respectively vertically arranged at the two ends of the composite middle plate 1 and rotated on the vehicle body. The rotation axis is consistent with its own height direction. One end of the rotation path is a fastening position. In the fastening position, the composite end plate 2 is clamped between the vehicle body and the composite middle plate 1 locked by the locking member 13, and the outer surface of the composite end plate 2 is combined with the outer surface of the composite middle plate 1 to form the outer surface of the front mask.

[0022] Compared with the prior art, the front mask of the present embodiment adopts a split structure consisting of a composite middle plate 1 and two composite end plates 2. In a normal use state, the composite middle plate 1 is located between the two composite end plates 2. The three are horizontally locked and fixed to the vehicle body by the locking member 13, while the two composite end plates 2 are clamped and fixed to the composite middle plate 1 and the vehicle body. The outer surface of the front mask is formed by the outer surface of the composite middle plate 1 (i.e., the surface facing outward at this time) and the outer surfaces of the two composite end plates 2 (i.e., the surfaces facing outward at this time). Figure 1 shown.

[0023] When maintenance operations such as adding coolant or engine oil are required, the front cover needs to be opened. By only releasing the locking operation of the locking piece 13 on the composite middle plate 1, most of the front cover can be opened by rotating the composite middle plate 1. Of course, on the basis of the above, the entire front cover 1 can be fully opened by rotating the composite end plates 2 at both ends toward the outside. The above operation can be performed in reverse. After the two composite end plates 2 are rotated in the opposite direction toward the vehicle body, the composite middle plate 1 is rotated in the opposite direction toward the vehicle body. The composite middle plate 1 and the composite end plates 2 are completely locked to the vehicle body by the locking piece 13, and the front cover can be completely closed.

[0024] Since the weight of the composite middle plate 1 and the weight of the composite end plate 2 are both less than the weight of the entire front mask, the work intensity of opening and closing the front mask is reduced, making it more convenient to open and close the front mask; not only that, the rotation axis of the composite end plate 2 is consistent with its own height direction, that is, during the rotation of the composite end plate 2, the height position of the composite end plate 2 remains unchanged, and there is no need to overcome the gravity of the composite end plate 2, making the rotation of the composite end plate 2 more convenient and labor-saving, further reducing the work intensity of opening and closing the front mask; in addition, since the composite middle plate 1 and the composite end plate 2 are light in weight and smaller in size than the entire front mask, there is no need to set up an additional four-bar linkage, which simplifies the complexity of the relevant components supporting the rotation of the entire front mask, reduces costs, and avoids interference between the front mask and the bumper during rotation. At the same time, there is no need to divide the upper corners of the top of the front mask into blocks, thereby ensuring the aesthetics under normal use.

[0025] A further improvement is that the circumferential outer edge of the composite middle plate 1 includes a rotating wall 111 and a locking wall 112 distributed along its own width direction and respectively adjacent to the rotation axis of the composite middle plate 1 and the locking member 13. In the locked state, the rotating wall 111 is located below the locking wall 112.

[0026] like Figure 2 and Figure 4 As shown, the composite middle plate 1 of the present invention is similar to an isosceles structure as a whole. The four side walls of the circumferential outer edge of the composite middle plate 1 are respectively a rotating wall 111, a locking wall 112 and two docking walls 113. The rotating wall 111, the locking wall 112 and the two docking walls 113 are all slender strips. When the composite middle plate 1 is locked and fixed on the automobile body by the locking member 13, the rotating wall 111 is located above the locking wall 112, and the rotating wall 111 is adjacent to the rotation axis of the composite middle plate 1, so that when the front mask is opened, the composite middle plate 1 rotates downward instead of upward, thereby reducing the height of the rotation path of the composite middle plate 1, facilitating the rotation operation of the composite middle plate 1, that is, reducing the work intensity of opening and closing the front mask.

[0027] A further improvement is that the locking member 13 is a buckle arranged on the inner surface of the composite middle plate 1 .

[0028] Specifically, Figure 3 and Figure 4 As shown, there are multiple locking members 13, and they are adjacent to the locking wall 112. The locking members 13 are spaced apart along the length direction of the locking wall 112. Correspondingly, a number of bayonet sockets equal to the number of the locking members 13 and matched one by one can be set on the automobile body. Through the snap-fit ​​cooperation between multiple pairs of buckles and bayonet sockets, the locking strength of the composite middle plate 1 can be guaranteed, and the vibration caused by heavy trucks during driving or other reasons can be avoided, which may cause the locking members 13 to detach from the automobile body and affect the locking strength.

[0029] A further improvement is that the composite end plate 2 in the fastened position is sealedly connected to the composite middle plate 1 locked by the locking member 13 via an elastic sealing strip 3 .

[0030] By setting the sealing strip 3, it is possible to achieve a buffer between the relative overlap of the composite middle plate 1 and the composite end plate 2, avoiding deformation and damage due to collision. Moreover, after the composite middle plate 1 and the composite end plate 2 rotate toward the car body, the sealing strip 3 can also fill the gap between the composite middle plate 1 and the composite end plate 2, reducing the wind resistance of the vehicle during driving, improving the endurance of the vehicle, and preventing mosquitoes from entering the heavy truck engine through the above air. Specifically, the sealing strip 3 is a rubber strip, fixed to the composite end plate 2, and one side of the composite end plate 2 is rotatably connected to the car body, and the outer surface of the other side is fixedly connected to the sealing strip 3. In the fastened position, the side of the composite end plate 2 with the sealing strip 3 is adjacent to the docking wall 113 of the composite middle plate 1, and the sealing strip 3 is used to achieve a sealed connection with the docking wall 113.

[0031] A further improvement is that the composite middle plate 1 includes a middle panel 11 and a middle frame 12 which are connected, and the outer surface of the middle panel 11 is the outer surface of the composite middle plate 1 .

[0032] The composite middle plate 1 of this embodiment adopts a combined structure of a middle panel 11 and a middle frame 12, wherein the middle panel 11 is located on the outside and is used to guide air flow and reduce wind resistance during the driving of the car, while the middle frame 12 is located on the inside and is used to provide structural support to the middle panel 11 and increase the overall structural strength of the composite middle plate 1.

[0033] Preferably, in the composite middle plate 1, the material of the middle panel 11 is PCPBT, and the material of the middle skeleton 12 is sheet metal; the middle skeleton 12 is located on the inner side of the curved surface where the circumferential outer edge of the middle panel 11 is located, that is, the circumferential outer edge of the middle panel 11 is the circumferential outer edge of the composite middle plate 1.

[0034] The outer middle panel 11 is made of PCPBT, mainly based on: First, the PCPBT material has high heat resistance and high impact resistance, and can withstand environmental changes of heavy trucks under different climatic conditions, such as high temperature, low temperature and ultraviolet rays, to ensure the long-term performance of the front cover, so that the middle panel 11 of the PCPBT material can maintain good toughness and is not easy to break after being impacted by external forces, thereby ensuring that the front structure of the heavy truck is not damaged; Secondly, compared with traditional metal materials, the density of PCPBT material is lower, which helps to reduce the overall weight of the composite middle plate 1, thereby reducing the normal weight and improving the fuel economy and endurance of heavy trucks; Third, PCPBT material is easy to process and shape, and can meet the design requirements of composite shapes, so that the composite middle plate 1 of the front mask has better streamline and aesthetics, and the surface of the material is smooth, so it is easy to carry out surface treatment such as painting to improve the appearance quality of the whole vehicle.

[0035] The inner middle frame 12 is made of sheet metal, mainly based on: First, sheet metal materials have high strength and rigidity, which can provide sufficient support and protection for the front cover to prevent deformation or damage in unexpected situations such as collisions; Second, the sheet metal material can be properly treated with anti-corrosion to resist erosion by environmental factors such as rain and salt, thereby extending the service life of the front mask; Third, compared with some high-performance plastics, sheet metal materials have more cost advantages, which helps to reduce the manufacturing cost of the front mask.

[0036] Therefore, the middle panel 11 of PCPBT material and the middle frame 12 of sheet metal material can achieve good performance complementarity, wherein the outer PCPBT middle panel 11 mainly undertakes various functions such as weather resistance, impact resistance and lightweight, while the sheet metal middle frame 12 is mainly responsible for providing strength and rigid support. The two-layer structure complements each other and jointly meets the use requirements of the front mask of heavy trucks; through the above-mentioned reasonable two-layer structure design, the overall performance of the front mask can be further improved, such as impact resistance, weather resistance, lightweight and other aspects.

[0037] In addition, a plurality of ventilation holes 14 are provided on the middle panel 11 . The ventilation holes 14 are through holes and are spaced apart from the middle frame 12 .

[0038] By providing the ventilation holes 14, the heavy truck can be driven so that a large amount of heat generated by the engine when running at high load can be discharged to the outside, thereby achieving heat dissipation and cooling of the engine, ensuring the normal use of the engine and extending the service life of the engine; not only that, during the driving of the heavy truck, a certain pressure will be generated inside the vehicle, and the ventilation holes 14 can make the inside and outside of the heavy truck connected to ensure consistent air pressure, and facilitate the rapid release of pressure inside the vehicle, thereby achieving pressure balance inside and outside the vehicle and preventing the front mask from being deformed or accidentally opened due to excessive internal pressure; moreover, by designing the ventilation holes 14 on the middle panel 11, the amount of production materials used in the middle panel 11 can be reduced, the production cost of the front mask can be reduced, and at the same time, the weight of the middle panel 11 and the front mask can be reduced, which helps to improve the fuel economy and endurance of the heavy truck.

[0039] A further improvement is that the middle panel 11 is fixedly connected to the middle frame 12 by screws. The rod of the screw passes through the middle frame 12 to achieve threaded connection with the middle panel 11, thereby strengthening the connection strength between the middle panel 11 and the middle frame 12 and preventing the two from separating.

[0040] In the composite middle plate 1 of this embodiment, a hinge 5 can be installed on the inner surface of the middle frame 12, adjacent to the rotating wall 111 of the middle panel 11, and the hinge 5 is used to realize the rotational connection between the composite middle plate 1 and the vehicle body, and the rotation axis is consistent with the length direction of the composite middle plate 1.

[0041] Similarly, in order to ensure the overall weather resistance, impact resistance and light weight requirements of the front mask in this embodiment, the structural design of the composite end plate 2 in this embodiment can refer to the structural design of the composite middle plate 1, and adopt a double-layer structure design of an end panel 21 and an end frame 22. The end panel 21 is located in the outer layer and the material is PCPB, which ensures the weather resistance, impact resistance and light weight of the composite end plate 2, while the end frame 22 is located in the inner layer and the material is sheet metal, which ensures the rigidity and structural strength of the composite end plate 2. The end frame 22 and the end panel 21 can be fixedly connected by screws to achieve the performance complementarity of the double-layer structure; in the composite end plate 2, a hinge 5 can be installed on the side of the end frame 22 away from the active path of the composite middle plate 1, and then the hinge 5 is connected to the vehicle body, so as to realize the rotation connection between the composite end plate 2 and the vehicle body, and the rotation axis is consistent with the height direction of the composite end plate 2.

[0042] A further improvement is that a mounting boss 114 is provided on a surface of the middle panel 11 adjacent to the middle frame 12 for screwing in and allowing a gap to exist between the inner surfaces of the middle frame 12 and the middle panel 11 .

[0043] Specifically, Figure 4 and Figure 5 As shown, a plurality of mounting bosses 114 are integrally formed on the middle panel 11, and the mounting bosses 114 are for screwing into. By providing a plurality of mounting bosses 114, the number of connection nodes between the middle panel 11 and the middle frame 12 is increased, thereby ensuring the connection strength between the middle panel 11 and the middle frame 12; moreover, the mounting bosses 114 provided on the inner surface of the middle panel 11 have a certain raised height, which is convenient for accommodating the rod of the screw, thereby preventing the screw from penetrating the middle panel 11, causing structural damage to the middle panel 11 and affecting the overall appearance performance of the middle panel 11.

[0044] In addition, by setting the mounting boss 114, the screw rod is passed through the middle frame 12 and screwed into the middle panel 11, so that after the middle frame 12 is fixedly connected to the middle panel 11, there is a gap between the middle frame 12 and the inner surface of the middle panel 11 (that is, the side close to the middle frame 12). After a slight impact or collision, the gap between the two can allow the middle panel 11 to deform slightly. After the impact force disappears, the middle panel 11 can return to its original shape by relying on its own elasticity. In this way, it is convenient for the middle panel 11 to buffer through slight deformation after a small impact force. The deformation degree of the middle panel 11 is limited by the middle frame 12, which is beneficial for the middle panel 11 to return to its original shape when the external force is small, thereby ensuring the good physical structural performance of the front mask.

[0045] In this embodiment, the size of the composite middle plate 1 in the horizontal direction is much larger than the size of the composite end plate 2 in the horizontal direction, that is, the length of the composite middle plate 1 is much larger than the width of the composite end plate 2. Usually, the weight of the composite middle plate 1 is about 15 kg, while the two composite end plates 2 are symmetrical and weigh 5 kg each. Compared with the prior art, the front mask with an overall weight of more than 25 kg is closed at one time. The front mask of this embodiment adopts a split structure of a composite middle plate 1 and two composite end plates 2, and in the process of opening the front mask, the composite middle plate 1 and the two composite end plates 2 are operated in batches, so that the opening and closing work intensity of the front mask is greatly reduced, and there is no need to set a complex four-bar linkage to support the opening and closing of the front mask, thereby reducing the structural complexity of the front mask related components. It is only necessary to install hinges 5 on the middle frame 12 and the end frame 22, and the hinges 5 can facilitate the opening and closing of the composite middle plate 1 and the composite end plates 2. The rotation operation has a simple structure and reduces production costs. There is no need to divide the front mask into blocks at the upper positions at both ends. When the composite end panel 2 is in a fastened position, the composite middle panel 12 can be locked on the vehicle body by the locking member 13. The outer surface of the end panel 21 and the outer surface of the middle panel 11 are combined to form the outer surface of the front mask, ensuring the overall appearance performance of the front mask. Both the end panel 21 and the middle panel 11 are PCPBT boards, which are easy to process and shape, ensuring the streamlined product, and are easy to carry out surface treatments such as painting, thereby further improving the appearance quality of the entire vehicle.

[0046] Second embodiment

[0047] like Figure 6-Figure 12 As shown, a front cover of a heavy truck according to a second embodiment of the present invention is based on the first embodiment, with the difference that the middle panel 11 and the middle frame 12 are rotationally connected and the relative rotation axis is parallel to the rotation axis of the composite middle panel 1.

[0048] Compared with the first embodiment in which the middle panel 11 is fixedly connected to the middle frame 12 by screws, in this embodiment, the middle panel 11 and the middle frame 12 are connected by relative rotation, and the relative rotation axis of the two is parallel to the rotation axis of the composite middle panel 1.

[0049] After the middle panel 11 and the middle frame 12 are connected by the above-mentioned connection method, when the composite middle panel 1 of the front mask is opened and closed, if the composite middle panel 1 is opened, the middle panel 11 and the middle frame 12 are opened in sequence; if the composite middle panel 1 is closed, the middle frame 12 and the middle panel 11 are closed in sequence.

[0050] Therefore, the opening and closing of the composite middle plate 1 can be operated in two steps, and the weight of the middle panel 11 and the middle frame 12 are both less than the weight of the composite middle plate 1, which can further reduce the opening and closing strength of the composite middle plate 1.

[0051] Moreover, compared with the first embodiment, the two are not fixedly connected, so the middle panel 11 and the middle frame 12 do not need to be fixedly connected by installing multiple screws, and only corresponding joints need to be set to satisfy the rotational connection relationship between the two, so that the composite middle panel 1 has a simpler structure and is more convenient to produce, and the amount of production materials of the composite middle panel 1 is reduced, thereby reducing the production cost, and avoiding damage to the middle panel 11 by the screws when installing the screws, thereby ensuring the structural strength of the middle panel 11; and when the locking member 13 locks the middle panel 11 on the vehicle body, the middle panel 11 is close to the outer surface of the middle frame 12, and the middle frame abuts against the vehicle body. After the composite middle panel 1 is impacted by external force, the middle panel 11 abuts against the middle frame 12, and the middle panel 11 is supported by the high physical structural strength of the middle frame 12 itself, thereby ensuring the structural strength of the composite middle panel 1, thereby preventing the middle panel 11 of the composite middle panel 1 from being deformed and damaged by the impact force.

[0052] A further improvement is that a rotation joint 4 is provided between the middle panel 11 and the middle frame 12 , and the rotation joint 4 comprises a first rotation seat 41 and a second rotation seat 42 which are detachably and rotationally connected.

[0053] After adopting the above structure, the rotation connection between the middle panel 11 and the middle frame 12 is realized through the detachably connected first rotating seat 41 and the second rotating seat 42, and the disassembly connection between the middle panel 11 and the middle frame 12 is convenient. In this way, when the middle panel 11 is deformed or damaged, it is only necessary to remove the middle panel 11 for replacement, without removing the entire composite middle panel 1, thereby reducing maintenance costs.

[0054] The specific structure of the revolute joint 4 is as follows Fig.10 and Fig.11As shown, in the rotating joint 4, the first rotating seat 41 includes a fixing plate 411 and a fixing seat 412 integrally formed on the fixing plate 411, a through hole is provided on the fixing seat 412, and the fixing plate 411 is fixedly connected to the middle frame 12 by a threaded bolt 43 and a first nut 44; the second rotating seat 42 is U-shaped, and the second rotating seat 42 can be integrally formed on the middle panel 11, or can be bonded to the inner surface of the middle panel 11 by glue, and the fixing seat 412 is located on the inner side of the second rotating seat 42 and the two end faces are respectively attached to the two inner side walls of the second rotating seat 42; the rotating joint 4 also includes a screw 45 and a second screw The female 46 and the rod of the screw 45 are in the shape of a smooth round shaft with an external thread at the tail, which is threadedly connected to the second nut 46 through the external thread. The rod of the screw 45 is sealed and penetrated at both ends of the second rotating seat 42 and the inner side of the through hole. The cap of the screw 45 and the second nut 46 are respectively fitted on both sides of the second rotating seat 42. In this way, a detachable rotating connection between the first rotating seat 41 and the second rotating seat 42 is realized, which can not only meet the rotating connection between the middle panel 11 and the middle frame 12, reduce the workload of opening and closing the composite middle panel 1, but also facilitate the disassembly and assembly of the middle panel 11 and the middle frame 12, and reduce the maintenance and replacement costs.

[0055] A receiving groove 121 is integrally formed on one side of the middle frame 12 adjacent to the middle panel 11 . The receiving groove 121 is used to receive the first rotating seat 41 and the second rotating seat 42 to protect the rotating joint 4 .

[0056] A further improvement is that the middle frame 12 is magnetically connected to the vehicle body.

[0057] After adopting the above structure, it is convenient for the middle frame 12 to switch from the open state to the closed state, that is, the middle frame 12 rotates upward from the bottom to the Fig.12 In the position shown, after approaching the vehicle body, the vehicle body and the middle frame 12 are magnetically connected to prevent the middle frame 12 from falling down. In this state, it is convenient for the middle panel 11 to rotate upward; at the same time, when the front cover needs to be opened, the middle panel 11 is rotated downward in sequence. At this time, the middle frame 12 is magnetically attracted by the vehicle body, and the position of the middle frame 12 can be fixed to prevent the middle frame 12 from rotating downward with the middle panel 11 during the opening process of the middle panel 11. After the middle panel 11 is rotated, the middle frame 12 can be rotated downward to open the entire composite middle panel 1. Therefore, the magnetic connection between the middle frame 12 and the vehicle body facilitates the opening and closing of the composite middle panel 1.

[0058] In order to achieve the magnetic connection between the middle frame 12 and the vehicle body, there are many ways, such as fixing a magnet on the vehicle body near the composite middle plate 1, and the middle frame 12 is made of martensitic stainless steel or ferritic stainless steel containing iron elements, so that the middle frame 12 can be attracted by the vehicle body with magnets; or the surface of the middle frame 12 is electroplated or coated, and the electroplated layer or coating layer of the middle frame 12 contains elements such as iron, nickel, cobalt, etc., and a magnet is fixed on the vehicle body, which can also achieve the magnetic connection between the middle frame 12 and the vehicle body; in addition, magnets with detailed magnetic properties can be fixed in both the middle frame 12 and the vehicle body, or a magnet can be fixed in one of them and a magnetic block can be fixed in the other, and the material of the magnetic block is one of iron, nickel, and cobalt, which can achieve the magnetic connection between the middle frame 12 and the vehicle body.

[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A front cover of a heavy truck, characterized in that: include: The composite middle plate is horizontal in length direction and rotates on the vehicle body with the axis of rotation being horizontal. The composite middle plate is provided with a locking member for locking it on the vehicle body; The composite end plates are respectively vertically arranged at the two ends of the composite middle plate and rotated on the vehicle body. The rotation axis is consistent with its own height direction. One end of the rotation path is a fastening position. In the fastening position, the composite end plate is clamped between the vehicle body and the composite middle plate locked by the locking member, and the outer surface of the composite end plate is combined with the outer surface of the composite middle plate to form the outer surface of the front mask.

2. The front cover of a heavy truck according to claim 1, characterized in that: The circumferential outer edge of the composite middle plate includes a rotating wall and a locking wall distributed along its width direction and respectively adjacent to the rotating axis of the composite middle plate and the locking member. In the locked state, the rotating wall is located below the locking wall.

3. The front cover of a heavy truck according to claim 2, characterized in that: The locking member is a buckle arranged on the inner surface of the composite middle plate.

4. The front cover of a heavy truck according to claim 1, characterized in that: In the fastened position, the composite end plate is sealed and connected to the composite middle plate locked by the locking member through an elastic sealing strip.

5. The front cover of a heavy truck according to claim 1, characterized in that: The composite middle plate comprises a middle panel and a middle frame connected to each other, and the outer surface of the middle panel is the outer surface of the composite middle plate.

6. The front cover of a heavy truck according to claim 5, characterized in that: The middle panel is fixedly connected to the middle frame by screws.

7. The front cover of a heavy truck according to claim 6, characterized in that: A mounting boss is provided on a surface of the middle panel adjacent to the middle frame, so that the screw can be screwed in and a gap exists between the inner surface of the middle frame and the middle panel.

8. The front cover of a heavy truck according to claim 5, characterized in that: The middle panel and the middle frame are rotatably connected, and the relative rotation axis is parallel to the rotation axis of the composite middle panel.

9. The front cover of a heavy truck according to claim 8, characterized in that: A rotation joint is arranged between the middle panel and the middle frame, and the rotation joint comprises a first rotation seat and a second rotation seat which are detachably rotatably connected.

10. The front cover of a heavy truck according to claim 8, characterized in that: The middle frame is magnetically connected to the vehicle body.

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