Vehicle door assembly storage device and using method thereof

Abstract

The invention discloses a vehicle door assembly storage device and a using method thereof.The storage device comprises a bottom frame, two front telescopic vertical rods and two rear telescopic vertical rods are upwards arranged at the four corners of the bottom frame correspondingly, and front transverse rods and rear transverse rods are arranged between the front telescopic vertical rods and between the rear telescopic vertical rods correspondingly; a set distance is arranged between the front cross rod and the bottom frame and between the rear cross rod and the bottom frame, a first fixed longitudinal beam and a second fixed longitudinal beam are arranged between the front cross rod and the rear cross rod in parallel in a spaced mode, and a plurality of first fixed clamping bases and a plurality of second fixed clamping bases are arranged on the first fixed longitudinal beam and the second fixed longitudinal beam in the length direction at intervals respectively. The first fixing longitudinal beam and the second fixing longitudinal beam are used for supporting the vehicle door assembly, meanwhile, the first fixing clamping base and the second fixing clamping base are used for fastening, the top left longitudinal beam is connected with the rotating stand column of the small vehicle door, the whole vehicle door assembly is fixedly placed, collision damage between vehicle doors is prevented, and it is guaranteed that the vehicle doors are stably stored.

Description

Technical Field

[0001] The present invention belongs to the technical field of bus production and manufacturing equipment, and particularly relates to a storage device for door assemblies, and also relates to a method for using the storage device for door assemblies. Background Art

[0002] In order to improve market competitiveness, bus manufacturing enterprises not only produce vehicles to meet domestic demands, but also produce different types of buses for different export countries. The door assembly of one type of bus mainly consists of a foldable small door and a large door. Rotating columns are provided above the left ends of both the small door and the large door, and the lower left end of the small door extends a set length beyond the large door to connect to the vehicle body frame, that is, the overall height of the door assembly is inconsistent, and the sizes of door assemblies of different models also vary.

[0003] Different vehicle models require material frames of different sizes. Due to the particularity of the door assembly, the storage device needs to fix the door frame and the bottom up and down. Since its side is the outer door panel, it cannot collide with the door or the material frame, thereby ensuring the relative stability of the door. Existing storage devices for door assemblies are all developed for a single vehicle model, that is, the distance between the upper and lower limits is fixed, and they are for door assemblies with flat upper and lower surfaces. Especially for vehicle models that have been discontinued in China, the existing storage material frames cannot be used to store the door assemblies of the above-mentioned vehicle models. Summary of the Invention

[0004] The purpose of the present invention is to provide a storage device for door assemblies for storing door assemblies with special shapes, prevent collisions and damage between doors, and at the same time provide a method for using the storage device for door assemblies, which can fix the door assembly in the storage device for door assemblies relatively quickly and accurately, and ensure the relative stability of the door.

[0005] The technical solution adopted by the present invention is a storage device for door assemblies, including a bottom frame. Two front telescopic vertical rods and two rear telescopic vertical rods are respectively provided upward at the four corners of the bottom frame. A front cross bar and a rear cross bar are respectively provided between the front telescopic vertical rods and between the rear telescopic vertical rods. The front cross bar and the rear cross bar are spaced a set distance from the bottom frame. A first fixed longitudinal beam and a second fixed longitudinal beam are arranged in parallel and at intervals between the front cross bar and the rear cross bar. A plurality of first fixed clamping seats and second fixed clamping seats are respectively arranged at intervals along the length direction on the first fixed longitudinal beam and the second fixed longitudinal beam; at the tops of the front telescopic vertical rods and the rear telescopic vertical rods, a top front cross bar and a top rear cross bar are respectively provided. Top left longitudinal beams and top right longitudinal beams are respectively provided at the upper parts of both ends of the top front cross bar and the top rear cross bar. Threaded holes are spaced along the length direction on the top left longitudinal beam, and the rotating column of the small door of the door assembly is fixedly connected by screws through the threaded holes.

[0006] Preferably, the bottom frame includes a front bottom cross beam and a rear bottom cross beam which are arranged in parallel. The lower parts of both ends of the front bottom cross beam and the rear bottom cross beam are respectively fixedly connected to a left bottom longitudinal beam and a right bottom longitudinal beam. The front telescopic vertical rod and the rear telescopic vertical rod are fixed on the outer end faces of the left bottom longitudinal beam or the right bottom longitudinal beam. Above both ends of the front bottom cross beam and the rear bottom cross beam, a third fixed longitudinal beam and a fourth fixed longitudinal beam are respectively provided. A third fixed clamping seat is provided on the third fixed longitudinal beam. The bottom left end of the small door of the door assembly is connected to the third fixed longitudinal beam through the third fixed clamping seat. The bottom of the large door of the door assembly is connected to the first fixed longitudinal beam through the first fixed clamping seat and is connected to the second fixed longitudinal beam through the second fixed clamping seat.

[0007] Preferably, fixed sleeves are slidably sleeved on both the front telescopic vertical rod and the rear telescopic vertical rod. Threaded holes are opened on the opposite sides of the fixed sleeves. After a fastening bolt is tightened through the threaded hole, the inner end thereof abuts against the front telescopic vertical rod or the rear telescopic vertical rod to fix the fixed sleeve on the front telescopic vertical rod or the rear telescopic vertical rod. Both ends of the front cross bar are lapped on the fixed sleeves of the two front telescopic vertical rods, and the rear cross bar is lapped on the fixed sleeves of the two rear telescopic vertical rods. Grooves are respectively arranged at intervals on the front cross bar and the rear cross bar. Both ends of the first fixed longitudinal beam and the second fixed longitudinal beam are embedded into the front cross bar or the rear cross bar through the grooves.

[0008] Preferably, the first fixed clamping seat includes an L-shaped first clamping seat plate. A fixing hole is opened on the bottom plate of the first clamping seat plate. The first clamping seat plate is connected to the first fixed longitudinal beam through a screw passing through the fixing hole. The side plate of the first clamping seat plate is trapezoidal and a first connection hole is opened in the center of the first clamping seat plate. The first connection hole is strip-shaped, and the aperture of the upper part of the first connection hole is larger than that of the lower part. The first clamping seat plate is connected to the bottom of the large door of the door assembly through a screw passing through the first connection hole.

[0009] Preferably, the second fixed clamping seat includes an L-shaped second clamping seat plate. Fixing holes are opened near both ends on the bottom plate of the second clamping seat plate. The second clamping seat plate is connected to the second fixed longitudinal beam through a screw passing through the fixing hole. A second connection hole is opened on the side plate of the second clamping seat plate. The second connection hole is strip-shaped and the aperture of the lower part is larger than that of the upper part. The second clamping seat plate is connected to the large door of the door assembly through a screw passing through the second connection hole.

[0010] Preferably, the third fixed clamping seat includes a fastening plate and a connecting plate. The connecting plate is L-shaped. Fixing holes are respectively opened at both ends where the connecting plate extends out. The third clamping seat plate is fixed on the third fixed longitudinal beam through a screw passing through the fixing hole. The fastening plate is arranged at the bending part of the connecting plate and is perpendicular to the connecting plate. At least two third connection holes are vertically opened on the fastening plate. The small door of the door assembly is connected through a bolt passing through the third connection hole.

[0011] Preferably, universal wheels are provided at the lower parts of the four corners of the bottom frame, and the universal wheels are equipped with brakes.

[0012] A using method of a door assembly storage device includes the following steps: Step 1: Lift a car door assembly into the interior of the storage device, place it at the rear end of the bottom frame, and vertically align it so that the bottom left end of the small car door of the car door assembly leans against the third fixed longitudinal beam; Step 2: Adjust the height of the fixed sleeve so that the first fixed longitudinal beam and the second fixed longitudinal beam are located below the large car door of the car door assembly and close to it. According to the model of the car door assembly, change the positions of the first fixed longitudinal beam and the second longitudinal beam, and adjust the distance between them; Step 3: Fold the small car door and the large car door of the car door assembly. The car door assembly shrinks. Align the bottom left end of the small car door of the car door assembly with the third fixed card seat. The large car door of the car door assembly is located on the first fixed longitudinal beam and the second fixed longitudinal beam. Further adjust the folding degree of the car door assembly so that both ends of the large car door are close to the first fixed card seat and the second fixed card seat respectively; Step 4: Operate the front telescopic vertical rod and the rear telescopic vertical rod to lower until the top left longitudinal beam abuts against the top of the rotating column of the small car door of the car door assembly; Step 5: Adjust the angle of the third fixed card seat so that the connecting plate is parallel to and close to the small car door of the car door assembly. The mounting hole position at the bottom left end of the small car door corresponds to the third connecting hole of the third fixed card seat. Use bolts to preliminarily connect the third fixed card seat and the third fixed longitudinal beam through the fixing holes, without tightening. Align the mounting positions at both ends of the bottom of the large car door of the car door assembly with the connecting holes of the first fixed card seat and the second fixed card seat, and use bolts to fasten. Then fasten the bolts on the fixing holes of the third fixed card seat, and use bolts to fasten the third card seat plate and the small car door through the first connecting hole; Step 6: Operate the front telescopic vertical rod and the rear telescopic vertical rod to lift upward by 2 - 3 cm, and use a screw rod to connect it to the top left longitudinal beam through the mounting position at the top of the rotating column. At this time, there is a gap between the top of the rotating column and the top left longitudinal beam; Step 7: Move the second car door assembly to the front of the first car door assembly inside the device, vertically align it so that the bottom left end of the small car door of the car door assembly leans against the third fixed longitudinal beam, and then operate according to the third step and the fifth step. Finally, use a screw rod to connect it to the top left longitudinal beam through the mounting position at the top of the rotating column to complete the storage and fixation of the second car door assembly. The subsequent car door assemblies are placed from the back to the front in sequence according to the second door frame. When the car door assembly needs to be taken, loosen the connection between the car door assembly and the storage device from the front to the back;

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1) By arranging a front cross bar and a rear cross bar above the bottom frame, arranging a first fixed longitudinal beam and a second fixed longitudinal beam between the front cross bar and the rear cross bar, the first fixed longitudinal beam and the second fixed longitudinal beam are used to support the large door of the door assembly, and at the same time, the first fixed bracket and the second fixed bracket are used to fasten the first fixed longitudinal beam and the second fixed longitudinal beam to the lower part of the large door, and the top left longitudinal beam is connected to the rotating column of the small door, so as to fix and place the door assembly as a whole, prevent collision damage between the doors, and ensure stable storage of the doors; 2) A third fixed longitudinal beam is arranged above the bottom left longitudinal beam, and connected to the lower part of the small door through the third fixed bracket, so as to further improve the stability of the door assembly placement, and the third fixed longitudinal beam is used as the left end positioning standard for the door assembly storage. After being positioned by the third fixed longitudinal beam, the door assembly is folded for storage, which is conducive to realizing the sequential placement of multiple door assemblies while effectively saving storage space; 3) The front cross bar and the rear cross bar are overlapped with the fixed sleeves respectively. By changing the height of the fixed sleeves, the height adjustment of the front cross bar and the rear cross bar is realized, that is, the height adjustment of the first fixed longitudinal beam and the second fixed longitudinal beam is realized. At the same time, by changing the connection position of the first fixed longitudinal beam and the second fixed longitudinal beam with the front cross bar and the rear cross bar, the distance between the first fixed longitudinal beam and the second fixed longitudinal beam is adjusted, which can adapt to the storage of door assemblies of different sizes of this type. In addition, after adjusting the front cross bar and the rear cross bar so that the first fixed longitudinal beam and the second fixed longitudinal beam and the third fixed longitudinal beam and the fourth fixed longitudinal beam are at the same height, the storage of most existing flat door assemblies can be realized, thereby improving versatility and saving resources. 4) The design of the first fixed card holder, the second fixed card holder and the third fixed card holder can change the direction according to the folding degree of the door assembly, ensuring that they are always parallel to the door panel of the door assembly, improving the connection reliability and avoiding stress damage caused by inconsistent force directions; 5) The method of using the door assembly storage device is to take the first door frame assembly as the standard. First, adjust the relative positions of the top left longitudinal beam, the first fixed longitudinal beam and the second fixed longitudinal beam according to the size of the first door frame assembly, so that the top left longitudinal beam and the bottom left longitudinal beam support the small car door between them, and the first fixed longitudinal beam and the second fixed longitudinal beam have a balanced supporting effect on the large car door. After being fastened and connected by the first fixed bracket, the second fixed bracket and the third fixed bracket respectively, the shape of the coach door frame is basically determined, and then the top left longitudinal beam is lifted so that there is a gap between it and the rotating column of the small car door. While meeting the positioning installation, it is also conducive to the subsequent placement of the coach door frame and the later disassembly and use. The overall installation efficiency is high and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the passenger car door frame assembly; Figure 2 It is a schematic diagram of the structure of the front crossbar and the rear crossbar; Figure 3 It is a schematic structural diagram of the first fixed card seat; Figure 4 It is a schematic structural diagram of the second fixed card seat; Figure 5 It is a schematic structural diagram of the third fixed card seat. Specific embodiments

[0015] The present invention will be further explained below in conjunction with the accompanying drawings of the specification, so as to be better understood by those skilled in the art.

[0016] Embodiment 1 As Figures 1-5 shown, a storage device for a vehicle door assembly includes a bottom frame 1. At the four corners of the bottom frame 1, two front telescopic vertical rods 2 and two rear telescopic vertical rods 3 are respectively provided upwards. The bottom frame 1 includes a bottom front cross beam 101 and a bottom rear cross beam 102 arranged in parallel. At the lower parts of both ends of the bottom front cross beam 101 and the bottom rear cross beam 102, a bottom left longitudinal beam 103 and a bottom right longitudinal beam 104 are respectively fixedly connected. The front telescopic vertical rods 2 and the rear telescopic vertical rods 3 are fixed to the outer end faces of the bottom left longitudinal beam 103 or the bottom right longitudinal beam 104, having a relatively large connection area. The overall bottom center of gravity of the vehicle door assembly storage device is close to the ground, and the stability is good.

[0017] A front cross bar 4 and a rear cross bar 5 are respectively provided between the front telescopic vertical rods 2 and between the rear telescopic vertical rods 3. In order to adapt to the vehicle door assembly, the front cross bar 4 and the rear cross bar 5 are spaced from the bottom frame 1 by a set distance. Between the front cross bar 4 and the rear cross bar 5, a first fixed longitudinal beam 6 and a second fixed longitudinal beam 7 are arranged in parallel at intervals. Along the length direction of the first fixed longitudinal beam 6 and the second fixed longitudinal beam 7, a plurality of first fixed card seats 8 and second fixed card seats 9 are respectively arranged at intervals. The first fixed longitudinal beam 6 and the second fixed longitudinal beam 7 support the large vehicle door of the vehicle door assembly; at the tops of the front telescopic vertical rods 2 and the rear telescopic vertical rods 3, a top front cross beam 13 and a top rear cross beam 14 are respectively provided. At the upper parts of both ends of the top front cross beam 13 and the top rear cross beam 14, a top left longitudinal beam 15 and a top right longitudinal beam 16 are respectively provided. Threaded holes are spaced along the length direction of the top left longitudinal beam 15, and bolts are used to fixedly connect the rotating column of the small vehicle door of the vehicle door assembly through the threaded holes. The first fixed longitudinal beam 6 and the second fixed longitudinal beam 7 support the large vehicle door of the vehicle door assembly. At the same time, the first fixed card seats 8 and the second fixed card seats 9 fasten the first fixed longitudinal beam 6 and the second fixed longitudinal beam 7 to the lower part of the large vehicle door. The top left longitudinal beam 15 is connected to the rotating column of the small vehicle door, so as to fixedly place the whole vehicle door assembly, prevent collision and damage between the vehicle doors, and ensure stable storage of the vehicle doors.

[0018] To further improve the stability of the placement of the door assembly, third fixed longitudinal beams 10 and fourth fixed longitudinal beams 11 are respectively provided above both ends of the bottom front cross beam 101 and the bottom rear cross beam 102. A third fixed clamping seat 12 is provided on the third fixed longitudinal beam 10. The left end bottom of the small door of the door assembly is connected to the third fixed longitudinal beam 10 through the third fixed clamping seat 12. The bottom of the large door of the door assembly is connected to the first fixed longitudinal beam 6 through the first fixed clamping seat 8 and is connected to the second fixed longitudinal beam 7 through the second fixed clamping seat 9. Using the third fixed longitudinal beam 10 as the left end positioning standard for storing the door assembly, and folding the door assembly for storage after positioning by the third fixed longitudinal beam 10 is conducive to realizing the sequential placement of multiple door assemblies while effectively saving storage space.

[0019] Furthermore, fixed sleeves 17 are slidably sleeved on both the front telescopic vertical rod 2 and the rear telescopic vertical rod 3. Threaded holes are opened on opposite sides of the fixed sleeve 17. After the fastening bolts 18 are tightened through the threaded holes, the inner ends thereof are in contact connection with the front telescopic vertical rod 2 or the rear telescopic vertical rod 3 to fix the fixed sleeve 17 on the front telescopic vertical rod 2 or the rear telescopic vertical rod 3. Both ends of the front cross bar 4 are lapped on the fixed sleeves 17 of the two front telescopic vertical rods 2, and the rear cross bar 5 is lapped on the fixed sleeves 17 of the two rear telescopic vertical rods 3; by changing the height of the fixed sleeve 17, the height adjustment of the front cross bar 4 and the rear cross bar 5 is realized, that is, the height adjustment of the first fixed longitudinal beam 6 and the second fixed longitudinal beam 7 is realized. In addition, grooves 19 are respectively provided at intervals on the front cross bar 4 and the rear cross bar 5. Both ends of the first fixed longitudinal beam 6 and the second fixed longitudinal beam 7 are embedded into the front cross bar 4 or the rear cross bar 5 through the grooves 19. By changing the connection positions of the first fixed longitudinal beam 6 and the second fixed longitudinal beam 7 with the front cross bar 4 and the rear cross bar 5 and adjusting the distance between the first fixed longitudinal beam 6 and the second fixed longitudinal beam 7, it can adapt to the storage of different sizes of this type of door assembly; in addition, after adjusting the front cross bar 4 and the rear cross bar 5 so that the first fixed longitudinal beam 6 and the second fixed longitudinal beam 7 are at the same height as the third fixed longitudinal beam 10 and the fourth fixed longitudinal beam 11, the storage of most existing flat door assemblies can be realized, improving the versatility and saving resources.

[0020] Among them, the first fixed card seat 8 includes an L-shaped first card seat plate 801. Fixing holes are formed on the bottom plate of the first card seat plate 801, and screws are used to connect the first fixed longitudinal beam 6 through the fixing holes. The side plate of the first card seat plate 801 is trapezoidal, and a first connection hole 802 is formed in the center of the first card seat plate 801. The first connection hole 802 is strip-shaped, and the aperture of the upper part of the first connection hole 802 is larger than that of the lower part. Screws are used to connect the bottom of the large door of the door assembly through the first connection hole 802. The second fixed card seat 9 includes an L-shaped second card seat plate 901. Fixing holes are formed near both ends on the bottom plate of the second card seat plate 901, and screws are used to connect the second fixed longitudinal beam 7 through the fixing holes. A second connection hole 902 is formed on the side plate of the second card seat plate 901. The second connection hole 902 is strip-shaped and the aperture of the lower part is larger than that of the upper part. Screws are used to connect the large door of the door assembly through the second connection hole 902. The third fixed card seat 12 includes a fastening plate 1201 and a connecting plate 1202. The connecting plate 1202 is L-shaped. Fixing holes are respectively formed at both ends where the connecting plate 1202 extends, and screws are used to fix the third fixed card seat 12 on the third fixed longitudinal beam 10 through the fixing holes. The fastening plate 1201 is arranged at the bending part of the connecting plate 1202 and is perpendicular to the connecting plate 1202. At least two third connection holes 1203 are vertically formed on the fastening plate 1201, and screws are used to connect the small door of the door assembly through the third connection holes 1203. During use, the first fixed card seat 8, the second fixed card seat 9, and the third fixed card seat 12 can change their directions according to the folding degree of the door assembly, ensuring that they are always parallel and attached to the door panel of the door assembly, improving the connection reliability, avoiding stress damage caused by inconsistent force directions, and the designs of the first connection hole, the second connection hole, and the third connection hole provide a clearance space, which is beneficial for the screws to be fully connected to the lower part of the door assembly.

[0021] To facilitate the turnover and use of the door assembly, universal wheels 20 are provided at the lower parts of the four corners of the bottom frame 1, and the universal wheels 20 are equipped with brakes.

[0022] Embodiment 2 A using method of a door assembly storage device includes the following steps: The first step: Lift a door assembly into the interior of the storage device, place it at the rear end of the bottom frame, and vertically align it so that the bottom left end of the small door of the door assembly leans against the third fixed longitudinal beam. The second step: Adjust the height of the fixed sleeve so that the first fixed longitudinal beam and the second fixed longitudinal beam are located under the large door of the door assembly and close to it. According to the model of the door assembly, change the positions of the first fixed longitudinal beam and the second longitudinal beam and adjust the distance between them. Step 3: Fold the small door and the large door of the door assembly, retract the door assembly, align the left end of the small door of the door assembly with the third fixed seat, and position the large door of the door assembly on the first fixed longitudinal beam and the second fixed longitudinal beam, and further adjust the folding degree of the door assembly so that the two ends of the large door are close to the first fixed seat and the second fixed seat respectively; Step 4: Operate the front telescopic pole and the rear telescopic pole to descend until the top left longitudinal beam abuts against the top of the rotating column of the small door of the door assembly; Step 5: Adjust the angle of the third fixed base so that the connecting plate is parallel to and close to the small door of the door assembly. The installation hole at the bottom of the left end of the small door corresponds to the third connecting hole of the third fixed base. Use bolts to preliminarily connect the third fixed base and the third fixed longitudinal beam through the fixing holes. Do not tighten them. Adjust the installation positions at both ends of the bottom of the large door of the door assembly to align with the connecting holes of the first fixed base and the second fixed base, and tighten them with bolts. Then tighten the bolts on the fixing holes of the third fixed base, and use bolts to fasten the third base plate and the small door through the first connecting holes. Step 6: Lift the front telescopic pole and the rear telescopic pole upwards by 2-3 cm, and connect them to the top left longitudinal beam through the installation station at the top of the rotating column with a screw. At this time, there is a gap between the top of the rotating column and the top left longitudinal beam; Step 7: Move the second door assembly to the inside of the device and locate it in front of the first door assembly. Align it vertically so that the bottom left end of the small door of the door assembly is against the third fixed longitudinal beam. Then follow the third and fifth steps. Finally, use a screw to connect it to the top left longitudinal beam through the installation station at the top of the rotating column to complete the storage and fixation of the second door assembly. The subsequent door assemblies are placed from back to front in sequence according to the second door frame. When the door assembly needs to be taken, loosen the connection between the door assembly and the storage device from front to back.

[0023] The method takes the first door frame assembly as the standard. Firstly, the relative positions of the top left longitudinal beam, the first fixed longitudinal beam and the second fixed longitudinal beam are adjusted according to the size of the first door frame assembly, so that the top left longitudinal beam and the bottom left longitudinal beam support the small car door between them, and the first fixed longitudinal beam and the second fixed longitudinal beam have a balanced supporting effect on the large car door. After being fastened and connected by the first fixed bracket, the second fixed bracket and the third fixed bracket respectively, the shape of the bus door frame is basically determined, and then the top left longitudinal beam is lifted so that there is a gap between it and the rotating column of the small car door, which not only meets the positioning installation, but also facilitates the subsequent placement of the bus door frame and the later disassembly and use, and the overall installation efficiency is high and the use effect is good.

[0024] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the spirit and principle of the present invention's design, various deformations and improvements made by those skilled in the art to the technical solution of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A door assembly storage device, characterized in that: The invention comprises a bottom frame (1), wherein two front telescopic uprights (2) and a rear telescopic upright (3) are respectively arranged upward at the four corners of the bottom frame (1), a front cross bar (4) and a rear cross bar (5) are respectively arranged between the front telescopic uprights (2) and the rear telescopic uprights (3), the front cross bar (4) and the rear cross bar (5) are spaced apart from the bottom frame (1) by a set distance, a first fixed longitudinal beam (6) and a second fixed longitudinal beam (7) are spaced apart in parallel between the front cross bar (4) and the rear cross bar (5), a plurality of first fixed clamping seats (8) and a plurality of second fixed clamping seats (9) are respectively spaced apart along the length direction on the first fixed longitudinal beam (6) and the second fixed longitudinal beam (7); a top left longitudinal beam (15) and a top right longitudinal beam (16) are respectively arranged at the top ends of the front telescopic uprights (2) and the rear telescopic uprights (3), threaded holes are spaced apart along the length direction on the top left longitudinal beam (15), and a rotating column of a small door of a door assembly is fixedly connected by a screw through the threaded holes.

2. A door assembly storage device according to claim 1, characterized in that: The bottom frame (1) comprises a bottom front crossbeam (101) and a bottom rear crossbeam (102) arranged in parallel, the lower parts of the two ends of the bottom front crossbeam (101) and the bottom rear crossbeam (102) are respectively fixedly connected to the bottom left longitudinal beam (103) and the bottom right longitudinal beam (104), and the front telescopic upright rod (2) and the rear telescopic upright rod (3) are fixed to the outer end surface of the bottom left longitudinal beam (103) or the bottom right longitudinal beam (104); the upper parts of the two ends of the bottom front crossbeam (101) and the bottom rear crossbeam (102) are respectively provided with a third fixed longitudinal beam (10) and a fourth fixed longitudinal beam (11), and the third fixed longitudinal beam (10) is provided with a third fixed seat (12), the left bottom end of the small door of the door assembly is connected to the third fixed longitudinal beam (10) through the third fixed seat (12), and the bottom of the large door of the door assembly is connected to the first fixed longitudinal beam (6) through the first fixed seat (8), and is connected to the second fixed longitudinal beam (7) through the second fixed seat (9).

3. The door assembly storage device according to claim 1, characterized in that: The front telescopic upright pole (2) and the rear telescopic upright pole (3) are both slidably sleeved with a fixing sleeve (17), threaded holes are provided on opposite sides of the fixing sleeve (17), and a fastening bolt (18) is tightened through the threaded holes so that the inner end contacts and connects with the front telescopic upright pole (2) or the rear telescopic upright pole (3) to fix the fixing sleeve (17) on the front telescopic upright pole (2) or the rear telescopic upright pole (3), and the two ends of the front cross bar (4) are overlapped on the fixing sleeves (17) of the two front telescopic upright poles (2), and the rear cross bar (5) is overlapped on the fixing sleeves (17) of the two rear telescopic upright poles (3); the front cross bar (4) and the rear cross bar (5) are respectively provided with grooves (19) at intervals, and the two ends of the first fixed longitudinal beam (6) and the second fixed longitudinal beam (7) are embedded in the front cross bar (4) or the rear cross bar (5) through the grooves (19).

4. The door assembly storage device according to claim 1, characterized in that: The first fixed base (8) comprises an L-shaped first base plate (8), a fixing hole is provided on the bottom plate of the first base plate (8), and is connected to the first fixed longitudinal beam (6) through the fixing hole by means of screws, the side plate of the first base plate (801) is trapezoidal, and a first connecting hole (802) is provided in the center of the first base plate (801), the first connecting hole (802) is strip-shaped, the aperture of the upper part of the first connecting hole (802) is larger than the aperture of the lower part, and is connected to the bottom of the large door of the door assembly through the first connecting hole (802) by means of screws.

5. The vehicle door assembly storage device according to claim 1, characterized in that: The second fixed base (9) comprises an L-shaped second base plate (901), the bottom plate of the second base plate (901) having fixing holes near both ends, the second base plate (901) being connected to the second fixed longitudinal beam (7) through the fixing holes by means of screws, the side plate of the second base plate (901) having a second connecting hole (902), the second connecting hole (902) being strip-shaped and having a lower hole diameter larger than an upper hole diameter, the second connecting hole (902) being connected to the large door of the door assembly by means of screws.

6. The vehicle door assembly storage device according to claim 2, characterized in that: The third fixed base (12) comprises a fastening plate (1201) and a connecting plate (1202); the connecting plate (1202) is L-shaped; fixing holes are respectively provided at both ends of the connecting plate (1202); the third fixed base (12) is fixed to the third fixed longitudinal beam (10) by means of screws through the fixing holes; the fastening plate (1201) is arranged at a bend of the connecting plate (1202) and is perpendicular to the connecting plate (1202); at least two third connecting holes (1203) are vertically provided on the fastening plate (1201); screws are used to connect the small door of the door assembly through the third connecting holes (1203).

7. The vehicle door assembly storage device according to claim 1, characterized in that: Universal wheels (20) are provided at the lower parts of the four corners of the bottom frame (1), and the universal wheels (20) are equipped with brakes.

8. A method for using a door assembly storage device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Lift a door assembly into the storage device, locate it at the rear end of the bottom frame, and align it vertically so that the bottom of the left end of the small door of the door assembly rests on the third fixed longitudinal beam; Step 2: Adjust the height of the fixing sleeve so that the first fixing longitudinal beam and the second fixing longitudinal beam are located at and close to the lower part of the large door of the door assembly. According to the model of the door assembly, change the position of the first fixing longitudinal beam and the second longitudinal beam and adjust the distance between them. Step 3: Fold the small door and the large door of the door assembly, retract the door assembly, align the left end of the small door of the door assembly with the third fixed seat, and position the large door of the door assembly on the first fixed longitudinal beam and the second fixed longitudinal beam, and further adjust the folding degree of the door assembly so that the two ends of the large door are close to the first fixed seat and the second fixed seat respectively; Step 4: Operate the front telescopic pole and the rear telescopic pole to descend until the top left longitudinal beam abuts against the top of the rotating column of the small door of the door assembly; Step 5: Adjust the angle of the third fixed base so that the connecting plate is parallel to and close to the small door of the door assembly. The installation hole at the bottom of the left end of the small door corresponds to the third connecting hole of the third fixed base. Use bolts to preliminarily connect the third fixed base and the third fixed longitudinal beam through the fixing holes. Do not tighten them. Adjust the installation positions at both ends of the bottom of the large door of the door assembly to align with the connecting holes of the first fixed base and the second fixed base, and tighten them with bolts. Then tighten the bolts on the fixing holes of the third fixed base, and use bolts to fasten the third base plate and the small door through the first connecting holes. Step 6: Lift the front telescopic pole and the rear telescopic pole upwards by 2-3 cm, and connect them to the top left longitudinal beam through the installation station at the top of the rotating column with a screw. At this time, there is a gap between the top of the rotating column and the top left longitudinal beam; Step 7: Move the second door assembly to the inside of the device and locate it in front of the first door assembly. Align it vertically so that the bottom left end of the small door of the door assembly is against the third fixed longitudinal beam. Then follow the third and fifth steps. Finally, use a screw to connect it to the top left longitudinal beam through the installation station at the top of the rotating column to complete the storage and fixation of the second door assembly. The subsequent door assemblies are placed from back to front in sequence according to the second door frame. When the door assembly needs to be taken, loosen the connection between the door assembly and the storage device from front to back.

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