Gas cylinder fixing device and vehicle

Abstract

The utility model provides a gas cylinder fixing device and a vehicle, the gas cylinder fixing device relates to the technical field of gas cylinder installation, the gas cylinder fixing device comprises a first fixing piece and a second fixing piece, the first fixing piece and the second fixing piece define a first installation space, the first installation space is used for installing a first gas cylinder, and the second installation space is used for installing a second gas cylinder. The first fixing piece is detachably connected with a supporting part, the supporting part is arranged in the first mounting space, the supporting part and the second fixing piece define a second mounting space, the second mounting space is used for mounting a second gas cylinder, and the diameter of the first gas cylinder is larger than that of the second gas cylinder. According to the gas cylinder fixing device, the first gas cylinder and the second gas cylinder with different diameters can be installed by disassembling and assembling the supporting part, the application range is wide, the gas cylinder fixing device is applied to a vehicle, and the convenience of replacing the gas cylinders in the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas cylinder installation, and particularly relates to a gas cylinder fixing device. At the same time, the utility model also relates to a vehicle applying the gas cylinder fixing device. Background Technique

[0002] With the progress and development of technology, the power system of vehicles has gradually developed from the traditional fuel power system to the power system using new energy as fuel. For example, in vehicles using hydrogen fuel, a hydrogen storage system needs to be arranged on the vehicle. However, compared with traditional fuel vehicles and pure electric vehicles, the number of vehicles using hydrogen energy fuel is relatively small.

[0003] When the existing hydrogen storage system is arranged on a vehicle, its installation structure is not yet mature. For example, the existing fixing device for fixing a hydrogen storage gas cylinder generally includes two fixing parts, and the two fixing parts are detachably connected, so as to facilitate the installation of the gas cylinder.

[0004] However, due to the different specifications of gas cylinders produced by different manufacturers, when the gas cylinder needs to be replaced on the vehicle, the gas cylinder cannot be replaced due to the mismatch between the gas cylinder fixing device and the gas cylinder. Content of the Utility Model

[0005] In view of this, the utility model aims to provide a gas cylinder fixing device that can install gas cylinders with different diameters.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A gas cylinder fixing device includes a first fixing part and a second fixing part that are detachably connected. The first fixing part and the second fixing part enclose a first installation space for installing a first gas cylinder.

[0008] A support part is detachably connected to the first fixing part. The support part is arranged in the first installation space and encloses a second installation space with the second fixing part for installing a second gas cylinder. The diameter of the first gas cylinder is larger than that of the second gas cylinder.

[0009] Further, the first fixing part includes a first fixing frame body in an arc shape and a first buffer part detachably connected to the first fixing frame body. The first buffer part is arranged along the shape of the first fixing frame body and is arranged inside the first fixing frame body.

[0010] Further, the support part includes a support main body and a support buffer part that can be arranged on the support main body.

[0011] The support part is detachably connected to the first fixing frame through the support body, and the support buffer part is arranged on one side of the support body facing the second fixing part.

[0012] Further, the support body is in a "C" shape, and the support buffer part is snap-fitted on the support body; and / or,

[0013] There are multiple support parts, and the multiple support parts are arranged at intervals along the bending direction of the first fixing frame.

[0014] Further, the second fixing part includes a second fixing frame in an arc shape and a second buffer part detachably connected to the second fixing frame. The second buffer part is arranged following the shape of the second fixing frame and is arranged inside the second fixing frame.

[0015] Further, a third buffer part is also arranged inside the second fixing part;

[0016] The third buffer part is snap-fitted on the second fixing part; and / or, the third buffer part is arranged at both parts of the second fixing frame close to the two ends.

[0017] Further, first extension parts extending outwards are respectively arranged at both ends of the first fixing part, and second extension parts extending outwards are respectively arranged at both ends of the second fixing part;

[0018] The corresponding first extension part and second extension part are connected through a connection component, and the connection component includes a bolt and a nut. The bolt passes through the first extension part and the second extension part, and the nut is screwed to the bolt.

[0019] Further, the connection component further includes a spring and a retaining cap sleeved on the bolt, and the retaining cap is used to prevent the spring from falling off the bolt.

[0020] Further, a mounting bracket is arranged on at least one of the first extension part and the second extension part. The gas cylinder fixing device is connected to the vehicle body through the mounting bracket, and a vehicle body connection part is arranged on the mounting bracket;

[0021] The mounting bracket is in a "C" shape, and / or a through hole for the bolt to pass through is arranged in the middle of the mounting bracket.

[0022] Compared with the prior art, the present utility model has the following advantages:

[0023] The gas cylinder fixing device described in the present utility model can form a first installation space and a second installation space by disassembling and assembling the support part, and can be used to install a first gas cylinder and a second gas cylinder with different diameters, with a wide range of applications. When applied to a vehicle, it is beneficial to improve the convenience of gas cylinder replacement on the vehicle.

[0024] In addition, making the first fixing member include a first fixing frame body and a first buffer part, and arranging the first buffer part conforming to the first fixing frame body are both beneficial to improving the reliability of gas cylinder fixing and preventing noise generated by gas cylinder shaking. The arranged support part includes a support main body and a support buffer part, which is also for facilitating the reliable fixing of the gas cylinder and preventing noise generated by gas cylinder shaking. As for detachably connecting the support part to the first fixing frame body through the support main body, it is beneficial to improve the convenience of disassembly and assembly of the support frame.

[0025] Furthermore, setting the support main body as a "ji" - shaped structure can utilize the characteristic of the large structural strength of the "ji" - shaped structure to improve the stability and reliability of gas cylinder fixing. Clamping the support buffer part onto the support main body is convenient for disassembly and assembly. Arranging multiple support parts is beneficial to stably and reliably fixing the gas cylinder and can save material costs.

[0026] As for making the second fixing member include a second fixing frame body and a second buffer part, it can also improve the reliability of gas cylinder fixing and prevent noise generated by gas cylinder shaking. Cooperating with the structure of the first fixing member, it has the beneficial effect of further stably fixing the gas cylinder. The arranged third buffer part is convenient for disassembly and assembly, and its setting near the connection part of the second fixing frame body and the first fixing frame body is beneficial to stably and reliably fixing the gas cylinder.

[0027] Moreover, setting the first extension part and the second extension part facilitates the arrangement of the connection component, and can ensure the convenience of disassembly and assembly of the first fixing member and the second fixing member, as well as the stability and reliability of their connection. The connection component includes a spring and a retaining cover, which can also play a role in adapting to the installation of gas cylinders with different diameters and can firmly hold the gas cylinder.

[0028] Setting the mounting bracket, which can utilize the characteristic of the large structural strength of the "ji" - shaped structure to improve the reliability of gas cylinder fixing on the vehicle body. Mounting the mounting bracket on the first extension part or the second extension part and passing a bolt through the mounting bracket further facilitates improving the stability and reliability of gas cylinder fixing on the vehicle body.

[0029] Another object of the present utility model is to propose a vehicle, in which the gas cylinder in the vehicle is fixed to the vehicle body through the above - mentioned gas cylinder fixing device.

[0030] For the vehicle described in the present utility model, by applying the above - mentioned gas cylinder fixing device, the vehicle can install gas cylinders with different diameters, with a wide range of applications and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0032] Figure 1 Schematic structural view of the gas cylinder fixing device according to the first embodiment of the present utility model when clamping the first gas cylinder;

[0033] Figure 2 Schematic structural view of the gas cylinder fixing device according to the first embodiment of the present utility model;

[0034] Figure 3 Schematic structural view of the gas cylinder fixing device according to the first embodiment of the present utility model when clamping the second gas cylinder;

[0035] Figure 4 is Figure 2 Schematic structural view of the assembly support part of the gas cylinder fixing device in

[0036] Figure 5 is Figure 4 Schematic structural view from another perspective;

[0037] Figure 6 is Figure 5 Schematic structural view without the first buffer part and the second buffer part assembled;

[0038] Figure 7 Schematic structural view of the second buffer part according to the first embodiment of the present utility model;

[0039] Figure 8 Schematic structural view of the first buffer part according to the first embodiment of the present utility model.

[0040] Explanation of reference numerals:

[0041] 1. First fixing member; 2. Second fixing member; 3. First gas cylinder; 4. Support part; 5. Second gas cylinder; 6. Connection assembly; 7. Mounting bracket;

[0042] 101. First fixing frame body; 1011. First extension part; 102. First buffer part;

[0043] 201. Second fixing frame body; 2011. Second extension part; 202. Second buffer part; 203. Third buffer part; 204. Card hole;

[0044] 401. Support main body; 402. Support buffer part;

[0045] 601. Bolt; 602. Nut; 603. Spring; 604. Retaining cap; 605. Gasket;

[0046] 701. Mounting bracket body; 7011. Through hole; 7012. Vehicle body connection part; 702. Reinforcing plate. Specific implementation mode

[0047] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0048] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connection parts" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0050] In the description of the present utility model, "inner" refers to the side facing the first installation space, and "outer" refers to the side facing away from the first installation space. In addition, when referring to gas cylinders, if the first gas cylinder and the second gas cylinder are not clearly defined, it can refer to the first gas cylinder or the second gas cylinder.

[0051] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0052] Embodiment 1

[0053] This embodiment relates to a gas cylinder fixing device, which has a simple structure, is convenient for disassembly and assembly, can install gas cylinders with different diameters, especially gas cylinders for storing hydrogen, and can improve the convenience of hydrogen refueling for vehicles.

[0054] Based on the above design concept, an exemplary structure of the gas cylinder fixing device in this embodiment in the application state is as Figure 1 shown, and the structure of the gas cylinder fixing device in this embodiment is as Figure 2As shown in the figure. In terms of the overall structure, the gas cylinder fixing device of this embodiment mainly includes a first fixing member 1 and a second fixing member 2. The first fixing member 1 and the second fixing member 2 are detachably connected together, and a first installation space is formed between the first fixing member 1 and the second fixing member 2 for installing a first gas cylinder 3.

[0055] As Figure 3 and Figure 4 shown in the figure, a support portion 4 is provided on the first fixing member 1. Preferably, the support portion 4 is detachably connected to the first fixing member 1, and the support portion 4 is arranged in the first installation space and forms a second installation space with the second fixing member 2 for installing a second gas cylinder 5. The diameter of the first gas cylinder 3 is larger than that of the second gas cylinder 5.

[0056] It should be noted that in this embodiment, since the support portion 4 is arranged in the first installation space, by disassembling and assembling the support portion 4, the gas cylinder fixing device can fix the first gas cylinder 3 and the second gas cylinder 5 with different diameters. The disassembly and assembly of the support portion 4 do not affect the stability and reliability of the fixation of the first gas cylinder 3 and the second gas cylinder 5.

[0057] As Figure 2 combined with Figure 6 and Figure 8 shown in the figure, as a preferred embodiment, the first fixing member 1 includes a first fixing frame body 101 in an arc shape and a first buffer portion 102 detachably connected to the first fixing frame body 101. The first buffer portion 102 is arranged following the shape of the first fixing frame body 101 and is arranged on the inner side of the first fixing frame body 101.

[0058] Preferably, flanges are provided on both sides of the first buffer portion 102, and the space between the flanges on both sides can be used for the first fixing frame body 101 to be embedded, so that the first buffer portion 102 can be fixed on the first fixing frame body 101, thereby improving the convenience and reliability of the application of the first fixing member 1.

[0059] In the above structure, making the first fixing member 1 include the first fixing frame body 101 and the first buffer portion 102, and making the first buffer portion 102 arranged following the shape of the first fixing frame body 101 are all beneficial to improving the reliability of gas cylinder fixation and preventing noise generated by the shaking of the gas cylinder. It should be noted that the first buffer portion 102 is preferably made of rubber material, which has good anti-slip and shock absorption effects.

[0060] As Figure 4 and Figure 5As shown, as a preferred embodiment, the support portion 4 includes a support main body 401 and a support buffer portion 402 that can be disposed on the support main body 401. The support buffer portion 402 is disposed on one side of the support main body 401 facing the second fixing member 2. When fixing the second gas cylinder 5, the support portion 4 can hold the second gas cylinder 5 tightly through the support buffer portion 402. Preferably, the support buffer portion 402 is made of rubber material, which has good anti-slip and shock-absorbing effects, so that after adding the support portion 4, the second gas cylinder 5 can be fixed stably and reliably.

[0061] In a preferred embodiment, the support portion 4 is detachably connected to the first fixing frame 101 through the support main body 401, which can improve the convenience of installation and disassembly of the support portion 4 and facilitate the convenience of gas cylinder replacement. It should be noted that the support portion 4 and the first fixing frame 101 can be connected, for example, through a screwing structure, a clamping structure, and a plugging structure.

[0062] In the above structure, the provided support portion 4 includes a support main body 401 and a support buffer portion 402, which is also for facilitating the reliable fixing of the gas cylinder and preventing noise generated by the shaking of the gas cylinder. As for detachably connecting the support portion 4 to the first fixing frame 101 through the support main body 401, it is beneficial to improve the convenience of disassembly and assembly of the support portion 4.

[0063] Specifically, still referring to Figure 4 and Figure 5 As shown, as a preferred embodiment, the support main body 401 is in a "C" shape. In this way, the characteristics of large structural strength of the "C" shape can be utilized to improve the stability and reliability of the gas cylinder fixing.

[0064] It should be noted that the portion of the support portion 4 for holding the second gas cylinder 5 tightly is preferably arc-shaped, which can make the support portion 4 have a larger contact area with the second gas cylinder 5 and improve the stability and reliability of the second gas cylinder 5 fixing. At the same time, in a preferred embodiment, the support buffer portion 402 is clamped on the support main body 401, making the disassembly and assembly of the support buffer portion 402 relatively convenient.

[0065] It should also be noted here that in this embodiment, there are multiple support portions 4, and the multiple support portions 4 are arranged at intervals along the bending direction of the first fixing frame 101. In this embodiment, there are two support portions 4, and both of the two support portions 4 can abut against the second gas cylinder 5, ensuring the stability and reliability of the second gas cylinder 5 fixing.

[0066] Here, setting the support portion 4 to be multiple is beneficial to stably and reliably fix the gas cylinder and can save material costs. It should be understood that the number of the support portions 4 can be other numbers in addition to two, such as one, three, etc.

[0067] Such as Figure 2 、 Figure 6 andFigure 7 As shown, as a preferred embodiment, the second fixing member 2 includes a second fixing frame body 201 in an arc shape, and a second buffer portion 202 detachably connected to the second fixing frame body 201. The second buffer portion 202 is arranged following the shape of the second fixing frame body 201 and is disposed inside the second fixing frame body 201.

[0068] In a preferred embodiment, the second buffer portion 202 is made of rubber material and has good anti-slip and shock-absorbing effects. In this structure, flanges are further provided on both sides of the second buffer portion 202, and the space between the flanges on both sides can be embedded with the second fixing frame body 201, so that the second buffer portion 202 can be fixed to the second fixing frame body 201, which can improve the convenience and reliability of the application of the second fixing member 2.

[0069] In the above structure, making the second fixing member 2 include the second fixing frame body 201 and the second buffer portion 202 can also improve the reliability of fixing the gas cylinder, and can prevent the gas cylinder from shaking and generating noise. Cooperating with the structure of the first fixing member 1, it has the beneficial effect of further firmly fixing the gas cylinder.

[0070] As Figure 4 and Figure 5 shown, as a preferred embodiment, a third buffer portion 203 is further provided inside the second fixing member 2. In a preferred embodiment, the third buffer portion 203 is snap-connected to the second fixing member 2, so that the third buffer portion 203 is convenient to disassemble and assemble.

[0071] In this embodiment, a clamping hole 204 is provided at a position of the second fixing frame body 201 close to the second extension portion 2011, and a clamping head is provided on one side of the third buffer portion 203 facing the second fixing frame body 201. The third buffer portion 203 can be clamped in the clamping hole 204 through the clamping head, so that the third buffer portion 203 can be fixed to the second fixing frame body 201, which can improve the convenience of the application of the second fixing member 2.

[0072] It should be noted that since the second fixing member 2 includes the second buffer portion 202, a clamping hole 204 also needs to be provided on the second buffer portion 202 to facilitate the third buffer portion 203 to be clamped on the second fixing member 2. In this embodiment, in order to better fix the gas cylinder, the shape of the third buffer portion 203 is not specifically limited, as long as it is conducive to stably and reliably holding the gas cylinder.

[0073] In a preferred embodiment, continuing to refer to Figure 4 and Figure 5 shown, third buffer portions 203 are provided at both ends of the second fixing frame body 201 close to the two ends. In this way, the third buffer portions 203 are arranged close to the connection portion between the second fixing frame body 201 and the first fixing frame body 101, which is conducive to stably and reliably fixing the gas cylinder.

[0074] Since the connection components 6 at both ends of the second fixing frame 201 are different, with the connection component at one end including a spring 603 and the connection component at the other end not including a spring 603, in a preferred embodiment, the shapes of the third buffer parts 203 at both ends are different.

[0075] In this embodiment, the upper part of the outer wall of the third buffer part 203 near the spring 603 is shaped to fit the inner wall of the second fixing member 2, and the lower part of the outer wall of the third buffer part 203 protrudes outward relative to the upper part of the outer wall of the third buffer part 203, so that the protruding part can be inserted between the first extension part 1011 and the second extension part 2011, having a better vibration damping effect. Preferably, the inner wall of the third buffer part 203 can be Figure 5 the plane shown, or an arc-shaped surface, so as to be able to hold the gas cylinder 5 tightly.

[0076] The outer wall of the third buffer part 203 at the other end is a plane, and the inner wall is an arc-shaped surface. In addition, the outer wall of the third buffer part 203 can also be shaped to fit the inner wall of the second fixing member 2, and the inner wall is a plane.

[0077] It should be understood that the shapes and structures of the third buffer parts 203 on both sides are not limited to Figure 5 those shown in and described above. In addition, the third buffer part 203 can also be of other shapes, as long as it can hold the gas cylinder 5 stably and reliably.

[0078] Still referring to Figure 4 and Figure 5 shown, as a preferred embodiment, first extension parts 1011 extending outward are respectively provided at both ends of the first fixing member 1, and second extension parts 2011 extending outward are respectively provided at both ends of the second fixing member 2, and the corresponding first extension part 1011 and second extension part 2011 are connected by a connection component 6.

[0079] In this embodiment, the connection component 6 includes a bolt 601 and a nut 602. The bolt 601 passes through the first extension part 1011 and the second extension part 2011, and the nut 602 is screwed to the bolt 601. In this structure, the first extension part 1011 and the second extension part 2011 are provided, which facilitates the arrangement of the connection component 6, and can ensure the convenience of disassembling and assembling the first fixing member 1 and the second fixing member 2, as well as the stability and reliability of their connection.

[0080] It should be noted that the first extension part 1011 and the first fixing frame 101 can be integrally formed or separately processed and then welded together. Preferably, flanges are provided on both sides of the first extension part 1011, which is beneficial to improving the structural strength of the first extension part 1011. The second extension part 2011 and the second fixing frame 201 can be integrally formed or separately processed and then welded together. Preferably, flanges are also provided on both sides of the second extension part 2011, which is beneficial to improving the structural strength of the second extension part 2011 and can improve the reliability of fixing the gas cylinder.

[0081] Continue to refer to Figure 4 and Figure 5 As shown, as a preferred embodiment, the connecting component 6 further includes a spring 603 and a retaining cap 604 sleeved on the bolt 601. The retaining cap 604 is used to prevent the spring 603 from falling off the bolt 601. Here, including the spring 603 and the retaining cap 604 in the connecting component 6 can also play a role in adapting to install gas cylinders of different diameters, which is beneficial to firmly holding the gas cylinder, especially suitable for existing gas cylinders that will expand after inflation.

[0082] In this embodiment, the connecting component 6 on one side includes a spring 603 and a retaining cap 604. One end of the spring 603 abuts against the second extension part 2011, and the other end abuts against the retaining cap 604. The retaining cap 604 is provided with a through hole 7011 for the bolt 601 to pass through. The connecting component 6 on the other side does not include a spring 603 and a retaining cap 604. It should be noted that in order to improve the reliability of screwing, the connecting component 6 in this embodiment further includes a gasket 605 sleeved on the bolt 601, which is beneficial to improving the reliability of screwing.

[0083] To facilitate the installation of the gas cylinder on the vehicle body, as Figure 4 shown, as a preferred embodiment, at least one of the first extension part 1011 and the second extension part 2011 is provided with a mounting bracket 7, so that the gas cylinder fixing device can be fixed on the vehicle body through the mounting brackets 7 at both ends.

[0084] Preferably, the mounting bracket 7 is in a "C" shape. In this way, the characteristics of large structural strength of the "C" shape can be utilized to improve the reliability of fixing the gas cylinder on the vehicle body. It should also be noted that a through hole 7011 for the bolt 601 to pass through is provided in the middle of the mounting bracket 7, so that the bolt 601 in the aforementioned connecting component 6 can be inserted into the through hole 7011, which is beneficial to improving the stability and reliability of fixing the gas cylinder on the vehicle body.

[0085] To facilitate installation on the vehicle body, a vehicle body connection part 7012 is provided on the mounting bracket 7. Specifically, the vehicle body connection part 7012 is a through hole provided on the mounting bracket 7. Through holes are provided on both sides of the mounting bracket 7, so that the mounting bracket 7 can be installed on the vehicle body through a connecting piece passing through the through hole. The connecting piece can include, for example, an existing bolt 601.

[0086] It should be noted that in this embodiment, the mounting bracket 7 is provided on the first extension part 1011 or the second extension part 2011, and the bolt 601 is passed through the mounting bracket 7, all of which are to improve the stability and reliability of the gas cylinder fixed on the vehicle body.

[0087] Preferably, as Figure 4 shown, flanges are provided on both sides of one mounting bracket 7, and the structural strength of the mounting bracket 7 can be improved, thereby improving the reliability of the gas cylinder fixed on the vehicle body. And as Figure 5 shown. The mounting bracket 7 on the other side includes a mounting bracket main body 701 in a "ji" shape, and reinforcing plates 702 provided on both sides of the mounting bracket main body 701, and reinforcing ribs are also provided on the mounting bracket 7, which can also improve the structural strength of the mounting bracket 7 and further improve the reliability of the gas cylinder fixed on the vehicle body.

[0088] The gas cylinder fixing device of this embodiment can form a first installation space and a second installation space with different minimum radial dimensions by disassembling and assembling the support part 4, and can be used to install the first gas cylinder 3 and the second gas cylinder 5 with different diameters, with a wide range of applications. When applied to a vehicle, it is beneficial to improve the convenience of gas cylinder replacement on the vehicle.

[0089] Embodiment 2

[0090] This embodiment relates to a vehicle, in which the gas cylinder in the vehicle is fixed to the vehicle body by the gas cylinder fixing device as in Embodiment 1.

[0091] The vehicle of this embodiment, by applying the above gas cylinder fixing device, enables the vehicle to install gas cylinders with different diameters, has a wide range of applications, is convenient to use, and can improve the convenience of gas replacement of the vehicle.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas cylinder fixing device, characterized in that: It includes a first fixing member (1) and a second fixing member (2) that are detachably connected. The first fixing member (1) and the second fixing member (2) enclose a first installation space for installing a first gas cylinder (3); A support portion (4) is detachably connected to the first fixing member (1). The support portion (4) is arranged in the first installation space and encloses a second installation space with the second fixing member (2) for installing a second gas cylinder (5). The diameter of the first gas cylinder (3) is larger than the diameter of the second gas cylinder (5).

2. The gas cylinder fixing device according to claim 1, characterized in that: The first fixing member (1) includes a first fixing frame body (101) in an arc shape, and a first buffer portion (102) detachably connected to the first fixing frame body (101). The first buffer portion (102) is arranged following the shape of the first fixing frame body (101) and is arranged on the inner side of the first fixing frame body (101).

3. The gas cylinder fixing device according to claim 2, characterized in that: The support portion (4) includes a support main body (401) and a support buffer portion (402) that can be arranged on the support main body (401); The support portion (4) is detachably connected to the first fixing frame body (101) through the support main body (401), and the support buffer portion (402) is arranged on the side of the support main body (401) facing the second fixing member (2).

4. The gas cylinder fixing device according to claim 3, characterized in that: The support main body (401) is in a "C" shape, and the support buffer portion (402) is clamped on the support main body (401); and / or, There are multiple support portions (4), and the multiple support portions (4) are arranged at intervals along the bending direction of the first fixing frame body (101).

5. The gas cylinder fixing device according to claim 1, characterized in that: The second fixing member (2) includes a second fixing frame body (201) in an arc shape, and a second buffer portion (202) detachably connected to the second fixing frame body (201). The second buffer portion (202) is arranged following the shape of the second fixing frame body (201) and is arranged on the inner side of the second fixing frame body (201).

6. The gas cylinder fixing device according to claim 5, characterized in that: A third buffer portion (203) is further arranged on the inner side of the second fixing member (2); The third buffer portion (203) is clamped on the second fixing member (2); and / or, the third buffer portion (203) is arranged at both positions of the second fixing frame body (201) close to the two ends.

7. The gas cylinder fixing device according to any one of claims 1-6, characterized in that: Both ends of the first fixing member (1) are respectively provided with first extension portions (1011) extending outwards, and both ends of the second fixing member (2) are respectively provided with second extension portions (2011) extending outwards; The corresponding first extension part (1011) and the second extension part (2011) are connected by a connecting component (6), and the connecting component (6) includes a bolt (601) and a nut (602). The bolt (601) is arranged through the first extension part (1011) and the second extension part (2011), and the nut (602) is screwed to the bolt (601).

8. The gas cylinder fixing device according to claim 7, wherein: The connecting component (6) further includes a spring (603) and a retaining cap (604) sleeved on the bolt (601), and the retaining cap (604) is used to prevent the spring (603) from falling off the bolt (601).

9. The gas cylinder fixing device according to claim 7, wherein: At least one of the first extension part (1011) and the second extension part (2011) is provided with a mounting bracket (7). The gas cylinder fixing device is connected to the vehicle body through the mounting bracket (7), and the mounting bracket (7) is provided with a vehicle body connecting portion (7012); The mounting bracket (7) is in a "C" shape, and / or a through hole (7011) for the bolt (601) to pass through is provided in the middle of the mounting bracket (7).

10. A vehicle, wherein: The gas cylinder in the vehicle is fixed to the vehicle body by the gas cylinder fixing device according to any one of claims 1-9.

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