Vehicle and carriage, rear door and assembling method thereof

Abstract

The invention discloses a vehicle and a carriage, a rear door and an assembling method thereof, and the vehicle comprises a chassis, a carriage body and a carriage body, a seventh connecting piece is arranged on the rear side of the top plate assembly; a third stand column is arranged on the rear side of the first side plate assembly; a fourth stand column is arranged on the rear side of the second side plate assembly; the rear door comprises an upturning door assembly and two telescopic rods, and the upturning door assembly comprises a second hinge and an upturning door assembly; the method specifically comprises the following assembling steps that (1) a rear bottom beam, a third stand column, a seventh connecting piece and a fourth stand column are encircled to form a frame-shaped structure; (2) a second hinge of the rear door is fixedly connected with a seventh connecting piece of the top plate assembly, and the upper end of an upturning door assembly is hinged to the second hinge; (3) the two ends of a telescopic rod are hinged to the upturning door assembly and the third stand column correspondingly; the two ends of the other telescopic rod are hinged to the overhead door assembly and the fourth stand column correspondingly. According to the scheme, an independent rear door frame does not need to be additionally arranged, assembling is convenient, meanwhile, materials are saved, and the overall weight of the compartment can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics, and particularly to a vehicle, its carriage, rear door and assembly method. Background Art

[0002] The carriage is an indispensable part of modern logistics. With its huge loading capacity, it can load a variety of multiple items to be transported at one time, improving the efficiency of each transportation. The carriage is usually composed of a top plate, side plates, a front plate and a rear door, etc. The whole carriage is installed on the chassis of the vehicle.

[0003] Generally speaking, the rear door of the carriage usually includes an opening structure, a rolling shutter door structure, an upward-opening door structure, a downward-opening door structure, etc. For example, the patent application with the publication number CN109515520A discloses a logistics vehicle and its carriage. The rear door panel assembly of its carriage includes a rear door frame assembly and a rear door assembly. The rear door frame assembly is used to cooperate with the side panel assembly, the chassis assembly and the skirt assembly at the same time. The rear door assembly is arranged at the rear door frame assembly. However, in this solution, an independent rear door frame assembly needs to be provided in the rear door panel assembly, and the assembly is relatively cumbersome. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a vehicle, its carriage, rear door and assembly method without an independent rear door frame assembly.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An assembly method for a rear door, comprising:

[0007] A chassis, with a rear chassis beam arranged along the left-right direction at its rear side;

[0008] A top plate assembly, with a seventh connecting member arranged along the left-right direction at its rear side;

[0009] A first side plate assembly, with a vertical third column arranged at its rear side;

[0010] A second side plate assembly, with a vertical fourth column arranged at its rear side;

[0011] A rear door, comprising an upward-opening door assembly and two telescopic rods. The upward-opening door assembly includes a second hinge and an upward-opening door component, and the upper end of the upward-opening door component is hinged to the second hinge;

[0012] Specifically, the following assembly steps are included:

[0013] 1) Install the first side plate assembly and the second side plate assembly on the left and right sides of the chassis, install the top plate assembly above the first side plate assembly and the second side plate assembly, and the rear chassis beam, the third column, the seventh connecting member and the fourth column enclose a frame structure;

[0014] 2) Fix the second hinge of the back door to the seventh connecting member of the top plate assembly, and hinge the upper end of the upward-opening door assembly to the second hinge;

[0015] 3) Hinge the two ends of one telescopic rod to the upward-opening door assembly and the third vertical column respectively; hinge the two ends of the other telescopic rod to the swing door assembly and the fourth vertical column respectively.

[0016] Preferably, it further includes two fourth corner brackets in an "L" shape and two fifth corner brackets in an "L" shape. A through cavity is provided in the rear bottom beam; a fourth socket is provided in the third vertical column, and the fourth socket is arranged along the length direction of the third vertical column; a fifth socket is provided in the fourth vertical column, and the fifth socket is arranged along the length direction of the fourth vertical column; a third socket is provided in the seventh connecting member, and the third socket is arranged along the length direction of the seventh connecting member; the upper ends of the two fourth corner brackets are respectively fixedly inserted on the left and right sides of the seventh connecting member and located in the third socket, and the lower ends of the two fourth corner brackets are respectively fixedly inserted downward into the fourth socket of the third vertical column and the fifth socket of the fourth vertical column; the upper ends of the two fifth corner brackets are respectively fixedly inserted upward into the fourth socket of the third vertical column and the fifth socket of the fourth vertical column, and the lower ends of the two fifth corner brackets are respectively fixedly inserted on the left and right sides of the rear bottom beam and located in the through cavity of the rear bottom beam.

[0017] Preferably, the upward-opening door assembly includes a third hinge, a twelfth connecting member, a thirteenth connecting member, a fourteenth connecting member and an upward-opening door. The twelfth connecting member and the thirteenth connecting member are arranged vertically. The twelfth connecting member and the thirteenth connecting member are respectively provided with a U-shaped groove and are clamped and fixed to the left and right sides of the upward-opening door through their own U-shaped grooves; the third hinge and the fourteenth connecting member are arranged horizontally. One end of the third hinge is provided with a U-shaped groove with an opening downward and is clamped and fixed to the upper side of the upward-opening door through its own U-shaped groove. The other end of the third hinge is hinged to the second hinge; the fourteenth connecting member is provided with a U-shaped groove with an opening upward and is clamped and fixed to the lower side of the upward-opening door through its own U-shaped groove.

[0018] Preferably, a first rain eaves protrudes backward from the rear side of the fourteenth connecting member. A fourth sealing strip is provided on the fourteenth connecting member, a fifth sealing strip is provided on the twelfth connecting member, and a sixth sealing strip is provided on the thirteenth connecting member.

[0019] Preferably, the second hinge includes a third connecting portion, a fourth connecting portion, and a fifth connecting portion. The third connecting portion and the fifth connecting portion are horizontally arranged. The upper end of the fourth connecting portion is vertically connected to the third connecting portion. The lower end of the fourth connecting portion is vertically connected to the rear side of the fifth connecting portion, thereby forming a U-shaped groove between the third connecting portion, the fourth connecting portion, and the fifth connecting portion that can be stuck to the rear side of the seventh connecting member of the top plate assembly and fixedly connected to the seventh connecting member. A recessed portion is provided on the front side of the fourth connecting portion. A first protruding portion and a second protruding portion are provided on the rear side surface of the fourth connecting portion. A sixth socket opening backward is formed between the first protruding portion and the second protruding portion. A first arc surface, a stop surface, and a second arc surface are sequentially arranged in the sixth socket from top to bottom. The extension surface of the stop surface can pass through the center of the first arc surface.

[0020] The third hinge includes a sixth connecting portion, a seventh connecting portion, an eighth connecting portion, and a ninth connecting portion. The sixth connecting portion and the eighth connecting portion are vertically arranged. The upper ends of the sixth connecting portion and the eighth connecting portion are respectively connected to the front and rear sides of the seventh connecting portion, thereby forming a U-shaped groove between the sixth connecting portion, the seventh connecting portion, and the eighth connecting portion that can be stuck to the upper side of the up-turning door and fixedly connected to the up-turning door. The lower end of the ninth connecting portion is connected to the seventh connecting portion. A first arc portion and a second arc portion are provided at the upper end of the ninth connecting portion. One end of the first arc portion is connected to the upper end of the ninth connecting portion. The other end of the first arc portion is a free end. The center of the first arc portion coincides with the center of the first arc surface and the outer diameter of the first arc portion is adapted to the diameter of the first arc surface. The second arc portion is arranged on the front side of the first arc surface. The center of the second arc portion coincides with the center of the second arc surface and the outer diameter of the second arc portion is adapted to the diameter of the second arc surface. A stop groove is provided on the side of the second arc portion close to the ninth connecting portion and the side of the first arc portion close to the ninth connecting portion.

[0021] A part of the first arc portion of the third hinge is arranged in the sixth socket of the second hinge. The first protruding portion of the second hinge is located in the stop groove of the third hinge. The second arc portion is located at the second arc surface of the sixth socket of the second hinge and can rotate within the second arc surface.

[0022] When the up-turning door is opened, the free end of the first arc portion abuts against the stop surface in the sixth socket. At this time, the first protruding portion of the second hinge is still located in the stop groove of the third hinge. When the up-turning door is closed, the end of the first protruding portion of the second hinge away from the fourth connecting portion abuts against the bottom of the stop groove of the third hinge. At this time, the free end of the first arc portion is still located in the sixth socket.

[0023] Preferably, the rear end of the third connecting portion extends backward to form a second eaves.

[0024] Preferably, the rear door further includes a lower swing door assembly. The lower end of the lower swing door assembly is hinged to the rear bottom beam. A telescopic rod is hinged between one side of the lower swing door assembly and the third column, and a telescopic rod is hinged between the other side of the lower swing door assembly and the fourth column.

[0025] A rear door is assembled by using the assembling method of a rear door as described above.

[0026] A carriage includes the rear door as described above.

[0027] A vehicle includes the carriage as described above.

[0028] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects: In this solution, a frame structure similar to a "rear door frame" can be formed by enclosing the rear bottom beam of the chassis, the seventh connecting member of the roof assembly, the third column of the first side plate assembly, and the fourth column of the second side plate assembly. There is no need to separately set up a separate rear door frame. While the assembly is convenient, materials are saved, which helps to reduce the overall weight of the carriage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of this carriage;

[0030] Figure 2 is Figure 1 a partial exploded view of

[0031] Figure 3 is an exploded view of the connection structure of the rear bottom beam, the seventh connecting member, the third column, the fourth column, the first side bottom beam, and the second side bottom beam

[0032] Figure 4 is an exploded view of the upper swing door assembly;

[0033] Figure 5 is a schematic diagram of the connection structure of the second hinge and the third hinge;

[0034] Figure 6 is a schematic diagram of the structure of the second hinge;

[0035] Figure 7 is a schematic diagram of the structure of the third hinge.

[0036] Reference Signs:

[0037] 1, chassis; 130, rear bottom beam; 1307, fifteenth connecting edge; 1308, first socket; 1309, second socket;

[0038] 2, bottom plate;

[0039] 3, roof assembly; 314, seventh connecting member; 3141, third socket;

[0040] 4. First side plate assembly; 42. First side bottom beam; 44. Third column; 441. Fourth socket;

[0041] 5. Second side plate assembly; 52. Second side bottom beam; 55. Fourth column; 551. Fifth socket;

[0042] 6. Front plate assembly;

[0043] 7. Rear door; 71. Upward-opening door assembly; 711. Second hinge; 7111. Third connecting part; 71111. Second eaves; 7112. Fourth connecting part; 71121. Concave part; 71122. First convex part; 71123. Second convex part; 71124. Sixth socket; 711241. First arc surface; 711242. Stop surface; 711243. Second arc surface; 7113. Fifth connecting part; 712. Third hinge; 7121. Sixth connecting part; 7122. Seventh connecting part; 7123. Eighth connecting part; 7124. Ninth connecting part; 71241. First arc part; 71242. Second arc part; 71243. Stop groove; 713. Twelfth connecting piece; 714. Thirteenth connecting piece; 715. Fourteenth connecting piece; 7151. First eaves; 716. Upward-opening door; 72. Telescopic rod;

[0044] 8. Fourth corner fitting;

[0045] 9. Fifth corner fitting;

[0046] 101. Sixth corner fitting. Detailed implementation manners

[0047] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0050] In the present invention, unless otherwise clearly stipulated and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly stipulated and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0052] For the sake of clear description, in the present invention, when the carriage is installed on the vehicle, the end where the vehicle head is located is the front, and vice versa; the side close to the space formed by the enclosure of the carriage is the inside, and vice versa.

[0053] As Figures 1 to 7 shown, the present invention discloses an assembly method for a rear door, including:

[0054] A chassis 1, with a rear bottom beam 130 arranged in the left - right direction on its rear side;

[0055] A top - plate assembly 3, with a seventh connecting member 314 arranged in the left - right direction on its rear side;

[0056] A first side - plate assembly 4, with a vertical third column 44 on its rear side;

[0057] A second side - plate assembly 5, with a vertical fourth column 55 on its rear side;

[0058] The rear door 7 includes a tilting door assembly 71 and two telescopic rods 72. The tilting door assembly 71 includes a second hinge 711 and a tilting door component. The upper end of the tilting door component is hinged to the second hinge 711.

[0059] Specifically, it includes the following assembly steps:

[0060] 1) Install the first side plate assembly 4 and the second side plate assembly 5 on the left and right sides of the chassis 1, and install the top plate assembly 3 above the first side plate assembly 4 and the second side plate assembly 5. The rear bottom beam 130, the third upright column 44, the seventh connecting piece 314, and the fourth upright column 55 enclose a frame structure.

[0061] 2) Fix the second hinge 711 of the rear door 7 to the seventh connecting piece 314 of the top plate assembly 3, and the upper end of the tilting door component is hinged to the second hinge 711.

[0062] 3) The two ends of one telescopic rod 72 are respectively hinged to the tilting door component and the third upright column 44; the two ends of the other telescopic rod 72 are respectively hinged to the tilting door component and the fourth upright column 55. The telescopic rod 72 is a hydraulic strut.

[0063] In this solution, a frame structure similar to a "rear door frame" can be formed by enclosing the rear bottom beam 130 of the chassis 1, the seventh connecting piece 314 of the top plate assembly 3, the third upright column 44 of the first side plate assembly 4, and the fourth upright column 55 of the second side plate assembly 5. There is no need to separately set up a separate rear door frame. While the assembly is convenient, it also saves materials and helps reduce the overall weight of the carriage.

[0064] As Figure 3 shown, in the present invention, it also includes two fourth corner brackets 8 arranged in an "L" shape and two fifth corner brackets 9 arranged in an "L" shape. There is a through cavity in the rear bottom beam 130; there is a fourth socket 441 in the third upright column 44, and the fourth socket 441 is arranged along the length direction of the third upright column 44; there is a fifth socket 551 in the fourth upright column 55, and the fifth socket 551 is arranged along the length direction of the fourth upright column 55; there is a third socket 3141 in the seventh connecting piece 314, and the third socket 3141 is arranged along the length direction of the seventh connecting piece 314; the upper ends of the two fourth corner brackets 8 are respectively fixedly inserted on the left and right sides of the seventh connecting piece 314 and are located in the third socket 3141, and the lower ends of the two fourth corner brackets 8 are respectively fixedly inserted downward into the fourth socket 441 of the third upright column 44 and the fifth socket 511 of the fourth upright column 55; the upper ends of the two fifth corner brackets 9 are respectively fixedly inserted upward into the fourth socket 441 of the third upright column 44 and the fifth socket 511 of the fourth upright column 55, and the lower ends of the two fifth corner brackets 9 are respectively fixedly inserted on the left and right sides of the rear bottom beam 130 and are located in the through cavity of the rear bottom beam 130.

[0065] By setting the fourth corner code 8 and the fifth corner code 9, the rear bottom beam 130, the seventh connecting member 314, the third upright column 44 and the fourth upright column 55 are fixed, so as to ensure that the frame structure formed by the four is stable and does not deform, facilitating the subsequent installation of the rear door 7.

[0066] The fourth corner code 8 is hollow, and several reinforcing ribs are provided inside the fourth corner code 8, so as to ensure the structural strength of the fourth corner code 8 while reducing its weight; the fifth corner code 9 is also hollow, and several reinforcing ribs are provided inside the fifth corner code 9, so as to ensure the structural strength of the fifth corner code 9 while reducing its weight. Screw mounting seats are provided on at least a part of the reinforcing ribs of the fourth corner code 8 to facilitate the fixing of the fourth corner code 8; screw mounting seats are provided on at least a part of the reinforcing ribs of the fifth corner code 9 to facilitate the fixing of the fifth corner code 9.

[0067] Specifically, a fifteenth connecting edge 1307 is provided in the through cavity of the rear bottom beam 130, and the fifteenth connecting edge 1307 divides the through cavity into a first socket 1308 and a second socket 1309 which are arranged up and down.

[0068] In this solution, two sixth corner codes 101 are further included. The sixth corner codes 101 are arranged in an "L" shape. One end of a sixth corner code 101 is fixedly connected to the lower end of the first side plate assembly 4 by bolts, and the other end is fixedly connected to the third upright column 44, the fifth corner code 9 and the rear bottom beam 130 on the first side plate assembly 4 by bolts. Specifically, a first side bottom beam 42 is fixedly installed at the lower end of the first side plate assembly 4. An inward U-shaped groove is provided on the first side bottom beam 42. One end of the sixth corner code 101 is pre-fixed in the U-shaped groove of the first side bottom beam 42 of the first side plate assembly 4 by bolts. During the assembly process of the rear door, first insert the upper end of a fifth corner code 9 into the fourth socket 441 of the third upright column 44 of the first side plate assembly 4, and fixedly connect the sixth corner code 101, the third upright column 44 and the fifth corner code 9 by bolts, so as to pre-position the installation position of the fifth corner code 9. Then, place the first side plate assembly 4 with the fifth corner code 9 installed on one side of the chassis 1, so that the fifth corner code 9 is inserted into the second socket 1309 of the through cavity of the rear bottom beam 130, and fixedly connect the sixth corner code 101, the rear bottom beam 130 and the fifth corner code 9 by bolts.

[0069] Similarly, one end of another sixth angle code 101 is fixedly connected to the lower end of the second side plate assembly 5 by bolts, and the other end is fixedly connected to the fourth upright column 55, the fifth angle code 9 and the rear bottom beam 130 on the second side plate assembly 5 by bolts. Specifically, a second side bottom beam 52 is fixedly installed at the lower end of the second side plate assembly 5. An inward U-shaped groove is provided on the second side bottom beam 52. One end of the sixth angle code 101 is pre-fixed in the U-shaped groove of the second side bottom beam 52 of the second side plate assembly 5 by bolts. During the assembly process of the rear door, first insert the upper end of a fifth angle code 9 into the fifth socket 551 of the fourth upright column 55 of the second side plate assembly 5, and fixedly connect the sixth angle code 101, the fourth upright column 55 and the fifth angle code 9 by bolts, so as to pre-position the installation position of the fifth angle code 9. Then, place the second side plate assembly 5 with the fifth angle code 9 installed on the other side of the chassis 1, so that the fifth angle code 9 is inserted into the second socket 1309 of the through cavity of the rear bottom beam 130, and fixedly connect the sixth angle code 101, the rear bottom beam 130 and the fifth angle code 9 by bolts.

[0070] After installing the first side plate assembly 4 and the second side plate assembly 5 on the left and right sides of the chassis 1, then install the top plate assembly 3. Specifically, when installing the top plate assembly 3, first insert one end of two fourth angle codes 8 into both ends of the third socket 3141 of the seventh connecting member 314 of the top plate assembly 3 respectively, and fix the fourth angle codes 8 and the seventh connecting member 314 by bolts, so as to pre-position the positions of the fourth angle codes 8. Then, place the top plate assembly 3 above the first side plate assembly 4 and the second side plate assembly 5, so that the lower end of one fourth angle code 8 is inserted into the fourth socket 441 of the third upright column 44 of the first side plate assembly 4 and fixed by bolts, and the lower end of the other fourth angle code 8 is inserted into the fifth socket 511 of the fourth upright column 55 of the second side plate assembly 5 and fixed by bolts. In this way, a frame structure similar to a "rear door frame" is formed. While the assembly is convenient, it also saves materials and helps to reduce the overall weight of the carriage.

[0071] In this solution, as Figure 4As shown, the upward-opening door assembly includes a third hinge 712, a twelfth connecting member 713, a thirteenth connecting member 714, a fourteenth connecting member 715, and an upward-opening door 716. The twelfth connecting member 713 and the thirteenth connecting member 714 are vertically arranged. The twelfth connecting member 713 and the thirteenth connecting member 714 are respectively provided with a U-shaped groove and are clamped and fixed to the left and right sides of the upward-opening door 716 through their own U-shaped grooves. The third hinge 712 and the fourteenth connecting member 715 are horizontally arranged. One end of the third hinge 712 is provided with a U-shaped groove opening downward and is clamped and fixed to the upper side of the upward-opening door 716 through its own U-shaped groove. The other end of the third hinge 712 is hinged to the second hinge 711. The fourteenth connecting member 715 is provided with a U-shaped groove opening upward and is clamped and fixed to the lower side of the upward-opening door 716 through its own U-shaped groove. The third hinge 712, the twelfth connecting member 713, the thirteenth connecting member 714, and the fourteenth connecting member 715 protect the periphery of the upward-opening door 716. The upward-opening door 716 is a thermoplastic composite board. Using the thermoplastic composite board can significantly reduce the weight of the carriage while being able to withstand large loads and impacts, and has good corrosion resistance and waterproofness. Moreover, since the upward-opening door 716 in this solution is lighter, although the lower end of the third hinge 712 is fixedly connected to the upward-opening door 716, the hinge connection between the third hinge 712 and the second hinge 711 is still stable and reliable.

[0072] A fourth sealing strip is provided on the fourteenth connecting member 715, a fifth sealing strip is provided on the twelfth connecting member 713, and a sixth sealing strip is provided on the thirteenth connecting member 714. In this way, when the upward-opening door assembly is closed, it can ensure that the left and right sides of the upward-opening door assembly are respectively hermetically connected to the third upright column 44 and the fourth upright column 55, and the lower side of the upward-opening door assembly is hermetically connected to the rear bottom beam 130.

[0073] In the present invention, as Figure 5 shown, the second hinge 711 and the third hinge 712 can be hermetically hinged. The first hinge 711 and the second hinge 712 are made of rubber material.

[0074] Specifically, in the present invention, as Figure 6As shown in the figure, the second hinge 711 includes a third connecting portion 7111, a fourth connecting portion 7112, and a fifth connecting portion 7113. The third connecting portion 7111 and the fifth connecting portion 7113 are horizontally arranged. The upper end of the fourth connecting portion 7112 is vertically connected to the third connecting portion 7111. The lower end of the fourth connecting portion 7112 is vertically connected to the rear side of the fifth connecting portion 7113, thereby forming a U-shaped groove between the third connecting portion 7111, the fourth connecting portion 7112, and the fifth connecting portion 7113 that can be stuck to the rear side of the seventh connecting member 314 of the top plate assembly 3 and fixedly connected to the seventh connecting member 314. On the rear side surface of the fourth connecting portion 7112, there are a first protruding portion 71122 and a second protruding portion 71123. Between the first protruding portion 71122 and the second protruding portion 71123, there is a sixth socket 71124 with an opening facing backward and obliquely downward. Inside the sixth socket 71124, there are a first arc surface 711241, a stop surface 711242, and a second arc surface 711243 arranged in sequence from top to bottom. The extension surface of the stop surface 711242 can pass through the center of the first arc surface 711241.

[0075] As Figure 7 shown in the figure, the third hinge 712 includes a sixth connecting portion 7121, a seventh connecting portion 7122, an eighth connecting portion 7123, and a ninth connecting portion 7124. The sixth connecting portion 7121 and the eighth connecting portion 7123 are vertically arranged. The upper ends of the sixth connecting portion 7121 and the eighth connecting portion 7123 are respectively connected to the front and rear sides of the seventh connecting portion 7122, thereby forming a U-shaped groove between the sixth connecting portion 7121, the seventh connecting portion 7122, and the eighth connecting portion 7123 that can be stuck to the upper side of the upward-opening door 716 and fixedly connected to the upward-opening door 716. The lower end of the ninth connecting portion 7124 is connected to the seventh connecting portion 7122. At the upper end of the ninth connecting portion 7124, there are a first arc portion 71241 and a second arc portion 71242. One end of the first arc portion 71241 is connected to the upper end of the ninth connecting portion 7124, and the other end of the first arc portion 71241 is a free end. The center of the first arc portion 71241 coincides with the center of the first arc surface 711241, and the outer diameter of the first arc portion 71241 is adapted to the diameter of the first arc surface 711241. The second arc portion 71242 is arranged on the front side of the first arc surface 711241. The center of the second arc portion 71242 coincides with the center of the second arc surface 711243, and the outer diameter of the second arc portion 71242 is adapted to the diameter of the second arc surface 711243, so that the second arc portion 71242 of the third hinge 712 can always rotate within the second arc surface 711243. On the side of the second arc portion 71242 close to the ninth connecting portion 7124 and the side of the first arc portion 71241 close to the ninth connecting portion 7124, there are stop grooves 71243.

[0076] Part of the first arc portion 71241 of the third hinge 712 is disposed within the sixth socket 71124 of the second hinge 711. The first protruding portion 71122 of the second hinge 711 is located within the retaining groove 71243 of the third hinge 712. The second arc portion 71242 is located at the second arc surface 711243 of the sixth socket 71124 of the second hinge 711 and is capable of rotating within the second arc surface 711243.

[0077] When the up - turning door 716 is opened, the free end of the first arc portion 71241 abuts against the retaining surface 711242 within the sixth socket 71124. At this time, the first protruding portion 71122 of the second hinge 711 still remains within the retaining groove 71243 of the third hinge 712. When the up - turning door 716 is closed, the end of the first protruding portion 71122 of the second hinge 711 away from the fourth connecting portion 7112 abuts against the bottom of the retaining groove 71243 of the third hinge 712. At this time, the free end of the first arc portion 71241 still remains within the sixth socket 71124. This can prevent the hinge failure of the third hinge 712 and the second hinge 711 during the rotation process.

[0078] In this solution, the second protruding portion 71123 of the second hinge 711 can shield the third hinge 712, and the hinge structure of the second hinge 711 and the third hinge 712 is not exposed, making the overall structure aesthetically pleasing. Moreover, the second protruding portion 71123 of the second hinge 711 can prevent rainwater, etc. from entering between the second hinge 711 and the third hinge 712. Also, on the third hinge 712, a water - guiding groove is formed between the ninth connecting portion 7124 and the seventh connecting portion 7122. The seventh connecting portion 7122 is inclined downward successively from front to back, thus facilitating the drainage of water in the water - guiding groove.

[0079] When the third hinge 712 rotates relative to the second hinge 711, the second hinge 711 may undergo a certain deformation. Therefore, a recessed portion 71121 is provided on the front side of the fourth connecting portion 7112, creating an appropriate gap between the fourth connecting portion 7112 and the rear side of the seventh connecting member 314 of the top plate assembly 3.

[0080] The rotation angle between the second hinge 711 and the third hinge 712 can be set to 90° or more. In this way, when the up - turning door 716 is opened, it does not limit the height of the object to be loaded, and the third hinge 712 will not fall off from the sixth socket 71124 of the second hinge 711.

[0081] The rear end of the third connecting portion 7111 extends backward to form a second rain - eaves 71111, thereby further shielding rainwater.

[0082] The rear door 7 further includes a downward-opening door assembly. The lower end of the downward-opening door assembly is hinged to the rear bottom beam 130. A telescopic rod is hinged between one side of the downward-opening door assembly and the third upright column 44, and a telescopic rod is hinged between the other side of the downward-opening door assembly and the fourth upright column 55. In this way, when loading and unloading goods, the downward-opening door in the downward-opening door assembly can be opened downward for use as a temporary platform, which is convenient for personnel operation and goods placement, and can also be used for loading and unloading by equipment such as forklifts, with high loading and unloading efficiency. As Figure 4 shown, a first eaves 7151 protrudes backward from the rear side of the fourteenth connecting member 715, thereby minimizing the possibility of rainwater entering the carriage from the upper side of the downward-opening door assembly.

[0083] The present invention also discloses a rear door assembled by using the assembling method of a rear door as described in the above item.

[0084] The present invention also discloses a Figure 1 carriage as shown, including a rear door as described above. Most of the frame structures on the carriage are made of aluminum, which is light in weight and beautiful in shape.

[0085] The present invention also discloses a vehicle including a carriage as described above.

[0086] All the features described in the specification, the appended claims and the drawings, whether alone or in any combination thereof, are important features of the present invention.

[0087] In the description of the present specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "one implementation manner", "specific implementation manner", "other implementation manners", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment, implementation manner or example of the present invention. In the present specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described above can also be combined in a suitable manner in any one or more embodiments, implementation manners or examples. The technical solutions described in the present invention also include the technical solutions formed by any one or more of the above-described specific features, structures, materials or characteristics alone or in combination.

[0088] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, variations, delete some features, add features or re-combine features within the scope of the present invention without departing from the principles and purposes of the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the innovative principles of the present invention still fall within the scope of the technical solutions of the present invention.

Claims

1. A method for assembling a backdoor, characterized in that, Including: A chassis (1) with a rear bottom beam (130) arranged in the left - right direction at its rear side; A top - plate assembly (3) with a seventh connecting member (314) arranged in the left - right direction at its rear side; A first side - plate assembly (4) with a vertical third column (44) at its rear side; A second side - plate assembly (5) with a vertical fourth column (55) at its rear side; A rear door (7) including a flip - up door assembly (71) and two telescopic rods (72). The flip - up door assembly (71) includes a second hinge (711) and a flip - up door component, and the upper end of the flip - up door component is hinged to the second hinge (711); Specifically, it includes the following assembly steps: 1) Install the first side - plate assembly (4) and the second side - plate assembly (5) on the left and right sides of the chassis (1), install the top - plate assembly (3) above the first side - plate assembly (4) and the second side - plate assembly (5). The rear bottom beam (130), the third column (44), the seventh connecting member (314) and the fourth column (55) enclose a frame - type structure; 2) Fix the second hinge (711) of the rear door (7) to the seventh connecting member (314) of the top - plate assembly (3), and hinge the upper end of the flip - up door component to the second hinge (711); 3) Hinge the two ends of one telescopic rod (72) to the flip - up door component and the third column (44) respectively; hinge the two ends of the other telescopic rod (72) to the flip - up door component and the fourth column (55) respectively.

2. The assembly method of a backdoor according to claim 1, characterized in that, It also includes two L - shaped fourth corner brackets (8) and two L - shaped fifth corner brackets (9). There is a through - cavity in the rear bottom beam (130); there is a fourth socket (441) in the third column (44), and the fourth socket (441) is arranged along the length direction of the third column (44); there is a fifth socket (551) in the fourth column (55), and the fifth socket (551) is arranged along the length direction of the fourth column (55); there is a third socket (3141) in the seventh connecting member (314), and the third socket (3141) is arranged along the length direction of the seventh connecting member (314). The upper ends of the two fourth corner brackets (8) are respectively fixedly inserted into the left and right sides of the seventh connecting member (314) and are located in the third socket (3141), and the lower ends of the two fourth corner brackets (8) are respectively fixedly inserted downward into the fourth socket (441) of the third column (44) and the fifth socket (511) of the fourth column (55); the upper ends of the two fifth corner brackets (9) are respectively fixedly inserted upward into the fourth socket (441) of the third column (44) and the fifth socket (511) of the fourth column (55), and the lower ends of the two fifth corner brackets (9) are respectively fixedly inserted into the left and right sides of the rear bottom beam (130) and are located in the through - cavity of the rear bottom beam (130).

3. The assembly method of a backdoor according to claim 1, wherein The upward-opening door assembly includes a third hinge (712), a twelfth connecting member (713), a thirteenth connecting member (714), a fourteenth connecting member (715), and an upward-opening door (716). The twelfth connecting member (713) and the thirteenth connecting member (714) are vertically arranged. The twelfth connecting member (713) and the thirteenth connecting member (714) are respectively provided with a U-shaped groove and are clamped and fixed to the left and right sides of the upward-opening door (716) through their own U-shaped grooves. The third hinge (712) and the fourteenth connecting member (715) are horizontally arranged. One end of the third hinge (712) is provided with a U-shaped groove opening downward and is clamped and fixed to the upper side of the upward-opening door (716) through its own U-shaped groove. The other end of the third hinge (712) is hinged to the second hinge (711). The fourteenth connecting member (715) is provided with a U-shaped groove opening upward and is clamped and fixed to the lower side of the upward-opening door (716) through its own U-shaped groove.

4. The assembling method of a backdoor according to claim 3, characterized in that A first eaves (7151) protrudes backward from the rear side of the fourteenth connecting member (715). A fourth sealing strip is provided on the fourteenth connecting member (715), a fifth sealing strip is provided on the twelfth connecting member (713), and a sixth sealing strip is provided on the thirteenth connecting member (714).

5. A method for assembling a back door according to claim 1, characterized in that, The second hinge (711) includes a third connecting portion (7111), a fourth connecting portion (7112), and a fifth connecting portion (7113). The third connecting portion (7111) and the fifth connecting portion (7113) are horizontally arranged. The upper end of the fourth connecting portion (7112) is vertically connected to the third connecting portion (7111). The lower end of the fourth connecting portion (7112) is vertically connected to the rear side of the fifth connecting portion (7113), so as to form a U-shaped groove between the third connecting portion (7111), the fourth connecting portion (7112), and the fifth connecting portion (7113) that can be clamped to the rear side of the seventh connecting member (314) of the top plate assembly (3) and is fixedly connected to the seventh connecting member (314). A recessed portion (71121) is provided on the front side of the fourth connecting portion (7112). A first protruding portion (71122) and a second protruding portion (71123) are provided on the rear side of the fourth connecting portion (7112). A sixth socket (71124) opening backward is formed between the first protruding portion (71122) and the second protruding portion (71123). A first arc surface (711241), a stop surface (711242), and a second arc surface (711243) are sequentially provided in the sixth socket (71124) from top to bottom. The extended surface of the stop surface (711242) can pass through the center of the first arc surface (711241). The third hinge (712) includes a sixth connecting portion (7121), a seventh connecting portion (7122), an eighth connecting portion (7123) and a ninth connecting portion (7124). The sixth connecting portion (7121) and the eighth connecting portion (7123) are vertically arranged. The upper ends of the sixth connecting portion (7121) and the eighth connecting portion (7123) are respectively connected to the front and rear sides of the seventh connecting portion (7122), so as to form a U-shaped groove capable of being clamped on the upper side of the up-turning door (716) between the sixth connecting portion (7121), the seventh connecting portion (7122) and the eighth connecting portion (7123) and be fixedly connected to the up-turning door (716). The lower end of the ninth connecting portion (7124) is connected to the seventh connecting portion (7122). The upper end of the ninth connecting portion (7124) is provided with a first arc portion (71241) and a second arc portion (71242). One end of the first arc portion (71241) is connected to the upper end of the ninth connecting portion (7124), and the other end of the first arc portion (71241) is a free end. The center of the first arc portion (71241) coincides with the center of the first arc surface (711241), and the outer diameter of the first arc portion (71241) is adapted to the diameter of the first arc surface (711241). The second arc portion (71242) is arranged on the front side of the first arc surface (711241). The center of the second arc portion (71242) coincides with the center of the second arc surface (711243), and the outer diameter of the second arc portion (71242) is adapted to the diameter of the second arc surface (711243). A stop groove (71243) is provided on the side of the second arc portion (71242) close to the ninth connecting portion (7124) and on the side of the first arc portion (71241) close to the ninth connecting portion (7124). A part of the first arc portion (71241) of the third hinge (712) is arranged in the sixth socket (71124) of the second hinge (711). The first protruding portion (71122) of the second hinge (711) is located in the stop groove (71243) of the third hinge (712). The second arc portion (71242) is located at the second arc surface (711243) of the sixth socket (71124) of the second hinge (711) and can rotate within the second arc surface (711243). When the up-turning door (716) is opened, the free end of the first arc portion (71241) abuts against the stop surface (711242) in the sixth socket (71124). At this time, the first protruding portion (71122) of the second hinge (711) is still located in the stop groove (71243) of the third hinge (712). When the up-turning door (716) is closed, the end of the first protruding portion (71122) of the second hinge (711) away from the fourth connecting portion (7112) abuts against the bottom of the stop groove (71243) of the third hinge (712). At this time, the free end of the first arc portion (71241) is still located in the sixth socket (71124).

6. A method for assembling a backdoor according to claim 5, characterized in that, The rear end of the third connecting part (7111) extends backward to form a second eaves (71111).

7. A method for assembling a back door according to claim 1, characterized in that, The rear door (7) further includes a downward-opening door assembly. The lower end of the downward-opening door assembly is hinged to the rear bottom beam (130). A telescopic rod is hinged between one side of the downward-opening door assembly and the third column (44), and a telescopic rod is hinged between the other side of the downward-opening door assembly and the fourth column (55).

8. A backdoor, characterized in that, Assemble using an assembly method for a rear door as described in any one of claims 1-7.

9. A carriage, characterized in that, It includes a rear door as described in claim 8.

10. A vehicle, characterized in that, It includes a carriage as described in claim 9.

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