A vehicle-mounted hydrogen bottle placement rack

Abstract

The present application relates to the field of support structures, and more particularly to a vehicle-mounted hydrogen cylinder placement rack, comprising an end mold portion for fixing the position of the end portion of the hydrogen cylinder, the end mold portions located at both ends of the same hydrogen cylinder are provided with the same appropriate length piece, the end mold portion is provided with a limiting piece passing through the appropriate length piece, the limiting piece is connected to the bottom of the end mold portion, the limiting piece is threadedly connected to a limiting nut that forces the appropriate length piece to press against the end mold portion, so that after the length of the hydrogen cylinder changes to a certain extent, the position of the limiting piece passing through the appropriate length piece is adjusted so that the spacing between the two end mold portions can be changed to accommodate hydrogen cylinders of different lengths.

Description

Technical Field

[0001] The present application relates to the field of bracket structures, and in particular to a vehicle-mounted hydrogen cylinder placement rack. Background Art

[0002] With the continuous development of new energy vehicles, hydrogen-powered vehicles have broad development prospects because they do not require battery stacks and their emissions are only water vapor. The most important part of hydrogen-powered vehicles is the hydrogen storage system. Currently, most hydrogen cylinders are made of steel with spherical ends. To improve the stability of hydrogen cylinders on vehicles, they need to be placed on corresponding steel structure racks.

[0003] Our company currently has a prior application, named a vehicle-mounted hydrogen supply system bracket, with announcement number CN213322673U, which includes a hydrogen supply bracket outer frame, which includes two rows of columns and several frame beams. The two rows of columns form a rectangular parallelepiped, and a first reinforcing diagonal brace is fixed between two adjacent columns in each row, and a second reinforcing diagonal brace is fixed between two adjacent frame beams at different heights; support legs are provided on both sides of the bottom of the hydrogen supply bracket outer frame, and each support leg includes two legs and a reinforcing cross angle iron. The two legs are vertically fixed to the bottom of the hydrogen supply bracket outer frame, and the reinforcing cross angle iron is fixed between the two legs.

[0004] Regarding the above-mentioned related technologies, the entire hydrogen supply bracket outer frame is fixed by columns and frame beams, and it is difficult to ensure the consistency of the lengths of hydrogen cylinders of different specifications. If you want to adapt to hydrogen cylinders of different lengths, you need to replace the entire hydrogen supply bracket outer frame, which is relatively inconvenient. Summary of the Invention

[0005] In order to facilitate adaptation to hydrogen cylinders of different lengths, the present application provides a vehicle-mounted hydrogen cylinder placement rack.

[0006] The vehicle-mounted hydrogen cylinder placement rack provided in this application adopts the following technical solution.

[0007] A vehicle-mounted hydrogen cylinder placement rack includes an end mold portion for fixing the position of the end of the hydrogen cylinder. The end mold portions located at both ends of the same hydrogen cylinder are provided with the same appropriate length piece. The end mold portion is provided with a limiting piece that penetrates the appropriate length piece. The limiting piece is connected to the bottom of the end mold portion. The limiting piece is threadedly connected to a limiting nut that forces the appropriate length piece to press tightly against the end mold portion.

[0008] By adopting the above technical solution, the limit nut is loosened to adjust the position of the limit part through the appropriate length part, so that the spacing between the end mold parts at both ends is changed, and the length of the hydrogen cylinder placed between the two end mold parts can be changed accordingly, so that when the length of the hydrogen cylinder changes to a certain extent, there is no need to replace the entire placement rack, which is more convenient and can also better avoid waste of resources.

[0009] Optionally, the length-adaptable member is provided with a plurality of limiting holes along the length direction of the hydrogen cylinder, and the limiting member is coaxially arranged and slidably connected to one of the limiting holes.

[0010] By adopting the above technical solution, when the length of the hydrogen cylinder changes, the limiting piece can be correspondingly inserted into different limiting holes to achieve the purpose of adjusting the distance between the two mold ends.

[0011] Optionally, the adaptable length piece is provided with a waist-shaped opening whose length direction is consistent with the length direction of the hydrogen cylinder, the limiting piece is slidably connected to the waist-shaped opening along the length direction of the waist-shaped opening, a tube rack is provided on the side of the adaptable length piece away from the limiting nut, and the end mold part is provided with an end mold rack engaged with the tube rack.

[0012] By adopting the above technical solution, when the length of the hydrogen cylinder changes, the limit nut is loosened so that the appropriate length piece can be appropriately away from the end mold part, and the tube rack is away from the end mold rack, so that the limit piece can be moved in the waist-shaped mouth, moved to the appropriate position and then the tube rack is engaged with the end mold rack, and the limit nut is tightened. The entire adjustment process does not require the limit piece to be pulled out from the end mold part, which is more convenient for adjustment.

[0013] Optionally, several end mold parts can be stacked along the length direction of the limiter, and each end mold part is fixedly connected to a plug-in strip on one side for the limiter to pass through. The plug-in strip of one end mold part is plugged in and slidably connected to the adjacent end mold part along the length direction of the hydrogen cylinder.

[0014] By adopting the above technical solution, a large number of hydrogen cylinders can be stacked in the vertical direction, and the position of the two end molds of the stacking arrangement of the plug-in strip is not prone to large deviations, and the plug-in strip can be moved along the length direction of the hydrogen cylinder, so that when the lengths of hydrogen cylinders of different heights are inconsistent, they can be stacked smoothly between the two end molds.

[0015] Optionally, the end mold portion includes a lower mold frame and an upper mold frame with the same structure and a distance therebetween. The lower mold frame and the upper mold frame are hollow inside, and the adjacent sides of the lower mold frame and the upper mold frame are provided with a placement opening for the end of the hydrogen cylinder to be placed therein. The circumference of the opening at one end of the placement opening close to the center point of the hydrogen cylinder is greater than the circumference of the opening at one end of the placement opening away from the center point of the hydrogen cylinder.

[0016] By adopting the above technical solution, the weight of the hollow upper mold frame and the lower mold frame is greatly reduced, and the inner wall of the arc with a large circumference of the placement mouth can be tightly attached to the bottle body of the hydrogen cylinder, and the inner wall of the arc with a small circumference of the placement mouth can be tightly attached to the spherical end of the hydrogen cylinder. While allowing the hydrogen cylinder to be placed stably, it can also prevent the placed hydrogen cylinder from moving arbitrarily along its own length.

[0017] Optionally, an intermediate plate is provided inside the lower mold frame and the upper mold frame. The side of the intermediate plate facing the end of the hydrogen cylinder is arc-shaped and fits the end of the hydrogen cylinder. The circumference of the arc-shaped side of the intermediate plate is between the maximum circumference and the minimum circumference of the placement port opening. A reinforcing plate is provided between the intermediate plate and the lower mold frame or the upper mold frame, and the reinforcing plate is close to the opening at the end with the larger circumference of the placement port.

[0018] By adopting the above technical solution, when the circumference of the hydrogen cylinder body is small, the hydrogen cylinder body can fit into the curved surface of the middle plate, and the spherical end of the hydrogen cylinder can fit into the inner wall of the opening with a small circumference of the placement mouth. When the circumference of the hydrogen cylinder body is large, the hydrogen cylinder body can fit into the inner wall of the opening with a large circumference of the placement mouth, and the spherical end of the hydrogen cylinder can fit into the curved surface of the middle plate, so as to adapt to hydrogen cylinders with different circumferences within a certain range. When the circumference of the hydrogen cylinder is large and the weight is large, in order to reduce the random movement of the hydrogen cylinder with large weight and inertia, a reinforcing plate is provided so that the middle plate and the inner wall of the upper mold frame or the lower mold frame can better jointly bear the external force in the length direction of the hydrogen cylinder, so that the middle plate is less likely to bend and deform.

[0019] Optionally, the upper mold frame and the lower mold frame are both slidably connected with an adjustment plate along the length direction of the hydrogen cylinder, and the adjustment plate is detachably connected with a close-fitting block toward the end of the hydrogen cylinder. The upper mold frame and the lower mold frame are both provided with a plate limiting mechanism for limiting the position of the adjustment plate.

[0020] By adopting the above technical solution, moving the position of the adjustment plate and replacing the tight-fitting blocks with different circumferences can achieve tight fitting of the ends of hydrogen cylinders in a larger range, so as to better fix the position of the hydrogen cylinder when the circumference of the hydrogen cylinder body or the circumference of the spherical end changes.

[0021] Optionally, the plate limiting mechanism includes a movable screw rotatably connected to the inside of the upper mold frame or the lower mold frame and threadedly connected to the adjustment plate, a worm gear coaxially fixedly connected to the movable screw, a worm engaged with the worm gear and rotatably connected to the upper mold frame or the lower mold frame, and a rotary block fixedly connected to the worm gear.

[0022] By adopting the above technical solution, the rotating block can be rotated to make the worm, worm wheel and movable screw rotate synchronously, so that the adjustment plate can move synchronously accordingly. The cooperation between the worm and worm wheel can also make it difficult for the adjustment plate to change its position randomly after adjustment.

[0023] Optionally, the end mold portion is provided with a weight-reducing groove for the position-limiting member to pass through, and a plurality of groove inner plates for the position-limiting member to pass through are provided in the weight-reducing groove.

[0024] By adopting the above technical solution, while further reducing the weight of the end mold part, the inner plate of the groove makes it difficult for the limiter to move arbitrarily relative to the end mold part along the length direction of the hydrogen cylinder, so that the hydrogen cylinder can remain stable after being placed.

[0025] Optionally, all of the length-adaptable pieces are provided with a same connecting frame at a proximal end thereof, and the connecting frame is plugged into the ends of all the length-adaptable pieces.

[0026] By adopting the above technical solution, all the suitable length parts can jointly withstand the external force in the vertical direction, making it more difficult for the stacked end molds to move randomly in the vertical direction, further ensuring the stability of the hydrogen cylinder.

[0027] In summary, this application has at least one of the following beneficial effects:

[0028] 1. When the length of the hydrogen cylinder changes to a certain extent, there is no need to replace the entire placement rack, which is more convenient and can also better avoid waste of resources;

[0029] 2. Moving the position of the adjustment plate and replacing the cling blocks with different circumferences can achieve clinging to the ends of hydrogen cylinders in a wider range, so as to better fix the position of the hydrogen cylinder when the circumference of the hydrogen cylinder body or the circumference of the spherical end changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the main structure of Example 1 of the present application;

[0031] Figure 2 This is a schematic diagram of the top view of a lower mold frame at the highest point in the first embodiment;

[0032] Figure 3 This is a schematic structural diagram of an end mold portion in Example 2 viewed along the horizontal radial direction of the hydrogen cylinder;

[0033] Figure 4 This is a schematic structural diagram of half of a lower mold frame in Example 2;

[0034] Figure 5 It is a structural diagram of the connection frame in the second embodiment.

[0035] Explanation of the accompanying reference numerals: 1. End mold part; 2. Appropriate length part; 21. Plate in the groove; 22. Connecting frame; 3. Limiting part; 31. Reinforcing plate; 32. Adjusting plate; 33. Close-fitting block; 34. Plate limiting mechanism; 35. Moving screw; 36. Worm gear; 37. Worm; 38. Rotating block; 39. Weight-reducing groove; 4. Limiting nut; 41. Limiting hole; 42. Waist-shaped opening; 43. Tube rack; 44. End mold rack; 45. Connecting strip; 46. Lower mold frame; 47. Upper mold frame; 48. Placement opening; 49. Middle plate; 5. Hydrogen cylinder. DETAILED DESCRIPTION

[0036] The present application is further described in detail below with reference to the accompanying drawings.

[0037] Example 1:

[0038] The first embodiment of the present application discloses a vehicle-mounted hydrogen cylinder placement rack, referring to Figure 1 , including an array of end mold parts 1 stacked in a vertical direction, two end mold parts 1 of each group are arranged in the same horizontal plane, and the two end mold parts 1 of the same group are used to fix the ends of two hydrogen cylinders 5 at the same height.

[0039] Reference Figure 1 and Figure 2 Each end mold part 1 includes an upper mold frame 47 and a lower mold frame 46 with the same structure and a spacing therebetween. The upper mold frame 47 is higher than the lower mold frame 46 of the same end mold part 1. A placement opening 48 is provided on the bottom surface of the upper mold frame 47 and the upper surface of the lower mold frame 46. The inner wall of the placement opening 48 is arc-shaped. The opening circumference of the placement opening 48 away from the center point of the hydrogen cylinder 5 is smaller than the opening circumference of the placement opening 48 close to the center point of the hydrogen cylinder 5. The upper mold frame 47 and the lower mold frame 46 are hollow inside. A vertical middle plate 49 is fixedly connected to the interior of both the frame 46 and the upper mold frame 47. The middle plate 49 is perpendicular to the length direction of the hydrogen cylinder 5. The side of the middle plate 49 facing the hydrogen cylinder 5 is arc-shaped. The circumference of the arc side of the middle plate 49 is located between the circumferences of the two openings of the placement port 48. A reinforcing plate 31 is fixedly connected between the middle plate 49 and the interior of the upper mold frame 47 or the lower mold frame 46. The reinforcing plate 31 is vertical and its length direction is consistent with the length direction of the hydrogen cylinder 5. A plug-in strip 45 is fixedly connected to the upper surface of the upper mold frame 47. The length direction of the plug-in strip 45 is consistent with the length direction of the hydrogen cylinder 5. The plug-in strip 45 is plugged into the corresponding lower mold frame 46 in the vertical direction. The plug-in strip 45 can be slidably connected to the lower mold frame 46 along its own length direction. The opening of the lower mold frame 46 for inserting the plug-in strip 45 passes through the two vertical side surfaces of the lower mold frame 46 perpendicular to the length direction of the plug-in strip 45.

[0040] When the circumference of the body of the hydrogen cylinder 5 is large, the body of the hydrogen cylinder 5 can be placed at the opening with the larger circumference of the placement port 48, and the spherical end of the hydrogen cylinder 5 is placed on the arc side of the middle plate 49. When the circumference of the body of the hydrogen cylinder 5 is small, the body of the hydrogen cylinder 5 is placed on the arc side of the middle plate 49, and the spherical end of the hydrogen cylinder 5 is placed at the opening with the smaller circumference of the placement port 48, so as to meet the placement requirements of hydrogen cylinders 5 with different body circumferences to a certain extent, and the reinforcing plate 31 can enhance the bending deformation resistance of the middle plate 49, so that when the hydrogen cylinder 5 with a larger body circumference is placed, the hydrogen cylinder 5 with a larger weight and greater inertia is not easy to cause the middle plate 49 to deform. In addition, the setting of the connecting strip 45 makes it easier to align the end mold parts 1 when they are stacked in the vertical direction, and when the length of the hydrogen cylinder 5 between the two end mold parts 1 changes, the two end mold parts 1 at different heights can move relative to each other.

[0041] Reference Figure 1 and Figure 2 A group of three lengthy pieces 2 are placed between the lower mold frame 46 and the upper mold frame 47 of the same end mold part 1, and a group of three lengthy pieces 2 are also placed on the upper surface of the upper mold frame 47 with the highest height. The lengthy pieces 2 can be rectangular steel pipes. The length direction of the lengthy pieces 2 is consistent with the length direction of the hydrogen cylinder 5. There is a hydrogen cylinder 5 between each adjacent lengthy piece 2. The bottom surface of the lengthy piece 2 abuts against the upper surface of the lower mold frame 46. A group of several vertical limiting holes 41 are opened on the upper surface of both ends of each lengthy piece 2. All end mold parts 1 in the same vertical direction are set There are three groups of limiters 3. The holes on one end mold part 1 through which the limiters 3 are inserted correspond one-to-one to the limiter holes 41 at the adjacent ends of the three lengthwise members 2 in the same group. The limiters 3 can be threaded rods, and the bottom ends of the limiters 3 can be threadedly connected to the lowest lower mold frame 46. The number of limiters 3 in each group is less than the number of upper limiter holes 41 on each lengthwise member 2, so that each group of limiters 3 can slide coaxially in the vertical direction corresponding to some of the limiter holes 41 on a lengthwise member 2, so that the end mold parts 1 at both ends of the hydrogen cylinder 5 are not easily separated along the length direction of the hydrogen cylinder 5. Each limiter 3 is threadedly connected to a limiter nut 4, which abuts the upper surface of the corresponding lengthwise member 2, so that the entire end mold part 1 is not easily moved in the vertical direction. For ease of operation, a corresponding limiter nut 4 can also be set only on the upper surface of the highest lengthwise member 2.

[0042] Reference Figure 2A weight-reducing groove 39 is provided at the position where the limit member 3 is passed through each lower mold frame 46 or upper mold frame 47. Several horizontal groove plates 21 are fixedly connected in the vertical direction in the weight-reducing groove 39. The limit member 3 is passed through in the vertical direction and is slidably connected to the groove plate 21. The hole for the limit member 3 to pass through on a groove plate 21 corresponds one to one with the limit hole 41 at one end of a corresponding length member 2, so that the weight of the entire end mold part 1 can be further reduced and the limiting effect on the limit member 3 can be improved.

[0043] The implementation principle of a vehicle-mounted hydrogen cylinder placement rack in the first embodiment of the present application is as follows: the two ends of the hydrogen cylinder 5 are respectively placed on the two lowest lower mold frames 46, and then the limit piece 3 is threadedly connected to the lower mold frame 46 with the lowest height, and the two appropriate length pieces 2 are sleeved corresponding to the limit piece 3 so that the appropriate length piece 2 abuts against the upper surface of the lower mold frame 46, and then the limit nut 4 is screwed in, and then the two upper mold frames 47 are sleeved on the limit piece 3 and placed at the two ends of the hydrogen cylinder 5, and then the end mold part 1 is stacked in turn according to the number of hydrogen cylinders 5 that need to be stacked. After the front of the end mold part 1 is finally stacked, the last appropriate length piece 2 is sleeved corresponding to the limit piece 3, and the limit nut 4 is threadedly connected to the limit piece 3 to abut against the appropriate length piece 2, completing the setting of the entire placement rack.

[0044] Example 2:

[0045] The second embodiment of the present application discloses a vehicle-mounted hydrogen cylinder placement rack, referring to Figure 3 The difference from the first embodiment is that each of the lengthened members 2 is provided with a waist-shaped opening 42 at both ends to replace the limiting hole 41. The length direction of the waist-shaped opening 42 is consistent with the length direction of the hydrogen cylinder 5. At this time, the number of holes for the limiting members 3 to pass through on one side of the end mold portion 1 and a groove inner plate 21 is consistent with the number of a group of limiting members 3.

[0046] Reference Figure 3 The limit piece 3 can be slidably connected to the inner wall of the waist-shaped mouth 42 along the length direction of the waist-shaped mouth 42. Three end mold racks 44 are fixedly connected to the lower surface of each lower mold frame 46 and the upper surface of the highest upper mold frame 47. The length direction of the end mold rack 44 is consistent with the length direction of the waist-shaped mouth 42. The lower surfaces of both ends of the appropriate length piece 2 are fixedly connected with a tube rack 43, which can engage with the end mold rack 44. The length of the tube rack 43 is less than the length of the end mold rack 44, so that when the length of the hydrogen cylinder 5 changes, the limit nut 4 can be loosened, and the appropriate length piece 2 can be moved up, and then the two end mold parts 1 can be moved to adapt to more subtle adjustments to the length of the hydrogen cylinder 5.

[0047] Reference Figure 4Each upper mold frame 47 and lower mold frame 46 is slidably connected to an adjustment plate 32 that replaces the middle plate 49. In this embodiment, the reinforcing plate 31 is no longer provided. The adjustment plate 32 moves along the length direction of the hydrogen cylinder 5. The adjustment plate 32 is tightly connected to the side of the hydrogen cylinder 5 facing the hydrogen cylinder 5 with a close-fitting block 33. The arc side surface of the close-fitting block 33 fits the hydrogen cylinder 5 so that the circumference of the arc side surface of the close-fitting block 33 can be adjusted according to the circumference of the body of the hydrogen cylinder 5 or the cross-sectional circumference of the spherical end surface of the hydrogen cylinder 5, so that the close-fitting block 33 can better fit the spherical end surface or the body of the hydrogen cylinder 5.

[0048] Reference Figure 4 The upper mold frame 47 and the lower mold frame 46 are both equipped with a plate limiting mechanism 34 for limiting the position of the adjustment plate 32. The plate limiting mechanism 34 includes a movable screw 35 rotatably connected to the upper mold frame 47 or the lower mold frame 46. The length direction of the movable screw 35 is consistent with the length direction of the hydrogen cylinder 5. The movable screw 35 is passed through and threadedly connected to the adjustment plate 32. The movable screw 35 is coaxially fixedly connected to a worm gear 36 rotatably connected to the outer wall of the upper mold frame 47 or the lower mold frame 46. The worm gear 36 is engaged with a worm 37 rotatably connected to the outer wall of the upper mold frame 47 or the lower mold frame 46. The worm 37 is vertical, and the upper end of the worm 37 is coaxially fixedly connected to a rotary block 38. The rotary block 38 can be a hexagonal block so that the rotary block 38 can be rotated using tools such as a wrench.

[0049] Reference Figure 5 All the adaptable length pieces 2 are fitted with a vertical connecting frame 22 at one end thereof. The connecting frame 22 has a protrusion integrally formed thereon corresponding to each adaptable length piece 2. The protrusion of the connecting frame 22 is tightly inserted into the inner wall of the end of the corresponding adaptable length piece 2, so that all the adaptable length pieces 2 can jointly bear the external force in the vertical direction.

[0050] The implementation principle of a vehicle-mounted hydrogen cylinder placement rack in embodiment 2 of the present application is: using a waist-shaped mouth 42 in conjunction with the setting of a tube rack 43 and an end mold rack 44 to maintain stability between the two end mold parts 1 of the same hydrogen cylinder 5 while being able to adjust the spacing more conveniently, and using a movable adjustment plate 32 in conjunction with a close-fitting block 33 to adapt to the hydrogen cylinder 5 with a smaller change in the bottle body circumference or the cross-sectional circumference of the spherical end, and the setting of the connecting frame 22 allows the entire placement rack to better form a whole and have better stability.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle-mounted hydrogen cylinder placement rack, characterized in that: The invention comprises an end mold part (1) for fixing the position of the end of a hydrogen cylinder (5), the end mold parts (1) located at both ends of the same hydrogen cylinder are provided with a same suitable length piece (2), the end mold part (1) is provided with a limiting piece (3) penetrating the suitable length piece (2), the limiting piece (3) is connected to the bottom of the end mold part (1), and the limiting piece (3) is threadedly connected to a limiting nut (4) forcing the suitable length piece (2) to press against the end mold part (1); The end mold portion (1) comprises a lower mold frame (46) and an upper mold frame (47) of identical structure and spaced apart from each other, the lower mold frame (46) and the upper mold frame (47) are both hollow inside, and adjacent sides of the lower mold frame (46) and the upper mold frame (47) are provided with a placement opening (48) for placing the end of the hydrogen bottle (5), and the opening circumference of one end of the placement opening (48) close to the center point of the hydrogen bottle (5) is greater than the opening circumference of one end of the placement opening (48) away from the center point of the hydrogen bottle (5); An adjustment plate (32) is slidably connected in the upper mold frame (47) and the lower mold frame (46) along the length direction of the hydrogen cylinder (5); a close-fitting block (33) is detachably connected to the end of the adjustment plate (32) facing the hydrogen cylinder (5); and a plate limiting mechanism (34) for limiting the position of the adjustment plate (32) is provided on the upper mold frame (47) and the lower mold frame (46); The plate limiting mechanism (34) comprises a movable lead screw (35) rotatably connected to the interior of an upper die frame (47) or a lower die frame (46) and threadedly connected to the adjustment plate (32), a worm wheel (36) coaxially fixedly connected to the movable lead screw (35), a worm (37) meshing with the worm wheel (36) and rotatably connected to the upper die frame (47) or the lower die frame (46), and a rotary block (38) fixedly connected to the worm (37).

2. The vehicle-mounted hydrogen cylinder placement rack according to claim 1 is characterized in that: The length-adaptable member (2) is provided with a plurality of limiting holes (41) along the length direction of the hydrogen cylinder (5), and the limiting member (3) is coaxially arranged and slidably connected to one of the limiting holes (41).

3. The vehicle-mounted hydrogen cylinder placement rack according to claim 1 is characterized in that: The length-adaptable member (2) is provided with a waist-shaped opening (42) whose length direction is consistent with the length direction of the hydrogen cylinder (5); the limiting member (3) is slidably connected to the waist-shaped opening (42) along the length direction of the waist-shaped opening (42); a tube rack (43) is provided on the side of the length-adaptable member (2) away from the limiting nut (4); and the end mold portion (1) is provided with an end mold rack (44) meshing with the tube rack (43).

4. The vehicle-mounted hydrogen cylinder placement rack according to claim 1 is characterized in that: A plurality of the end mold parts (1) can be stacked along the length direction of the limiting member (3); a plug-in strip (45) is fixedly connected to a side surface of each end mold part (1) for the limiting member (3) to pass through; the plug-in strip (45) of one end mold part (1) is plugged in and slidably connected to an adjacent end mold part (1) along the length direction of the hydrogen cylinder (5).

5. The vehicle-mounted hydrogen cylinder placement rack according to claim 1 is characterized in that: The lower mold frame (46) and the upper mold frame (47) are both provided with an intermediate plate (49) inside. The side surface of the intermediate plate (49) facing the end of the hydrogen bottle (5) is arc-shaped and fits the end of the hydrogen bottle (5). The circumference of the arc-shaped side surface of the intermediate plate (49) is located between the maximum circumference and the minimum circumference of the opening of the placement opening (48). A reinforcing plate (31) is provided between the intermediate plate (49) and the lower mold frame (46) or the upper mold frame (47). The reinforcing plate (31) is close to the opening of the end with a larger circumference of the placement opening (48).

6. The vehicle-mounted hydrogen cylinder placement rack according to claim 1 is characterized in that: The end mold portion (1) is provided with a weight-reducing groove (39) for the position-limiting member (3) to pass through, and a plurality of groove inner plates (21) for the position-limiting member (3) to pass through are provided in the weight-reducing groove (39).

7. The vehicle-mounted hydrogen cylinder placement rack according to claim 1 is characterized in that: All of the appropriately long pieces (2) are provided with a common connection frame (22) at a similar end, and the connection frame (22) is plugged into the ends of all of the appropriately long pieces (2).

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