Hydrogen filling device with adjustable positioning structure

Abstract

The invention relates to the technical field of hydrogen filling, and particularly discloses a hydrogen filling device with an adjustable positioning structure, the hydrogen filling device comprises a hydrogen filling machine, the front side of the hydrogen filling machine is fixedly provided with a bottom plate, the upper end of the front side of the hydrogen filling machine is fixedly provided with an adjusting and moving mechanism, and the top of the hydrogen filling machine is fixedly provided with a connecting hose; the hydrogen filling efficiency is improved by arranging the rotating and shifting mechanism, when the device is used, a hydrogen tank is placed on the inner side of the positioning mechanism and started for auxiliary positioning, then the shifting mechanism is started, a first motor drives a first lead screw to enable a sliding block to slide in a front rail, a concave pipe and a filling gun are driven, and the filling gun is made to reach the position above the hydrogen tank; the electric push rod pushes the filling gun to sleeve the gas valve to start filling, after filling, the electric push rod retracts, the second motor drives the rotary disc to exchange the positioning mechanisms, and in the whole process, all the positioning mechanisms can be flexibly adjusted, and continuous and rapid hydrogen filling is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen filling, in particular to a hydrogen filling device with an adjustable positioning structure. Background Art

[0002] A hydrogen filling device is a device specially used to fill hydrogen fuel cell vehicles or other hydrogen-using equipment with hydrogen. It mainly consists of a hydrogen storage part, such as a high-pressure hydrogen storage tank, to ensure the supply of hydrogen; there is also a pressure regulating system that can adjust the high-pressure hydrogen in the storage tank to a pressure value suitable for filling; the filling gun is a key component connected to the receiving equipment such as the car, and its design must ensure safe and efficient hydrogen transmission; the metering system is used to accurately measure the amount of hydrogen filled; safety protection devices are crucial in the entire filling process, including sealing components to prevent hydrogen leakage, emergency shut-off devices, etc., to ensure operational safety when filling hydrogen, a flammable and explosive gas. It plays a key role in the field of hydrogen energy utilization and provides important infrastructure support for the promotion and application of hydrogen energy;

[0003] The Chinese patent with the publication number of "CN219453633U" discloses a hydrogen filling device which is easy to maintain, comprising a hydrogen filling machine, an inspection door is arranged on one side of the hydrogen filling machine, a winding mechanism is arranged on the bottom of the other side of the hydrogen filling machine away from the inspection door, a control panel is arranged on the top of the other side of the hydrogen filling machine, and an inflating head placement box is arranged on one side of the control panel; a placement slot is opened inside the hydrogen filling machine, an air inlet pipe is arranged inside the placement slot, a cooling mechanism is arranged on the outside of the air inlet pipe, one end of the air inlet pipe is connected to the winding mechanism, the winding mechanism is connected to the inflating head through an inflating hose, and the inflating head is installed inside the inflating head placement box. The utility model can regularly wind and collect the long inflating hose by arranging the winding mechanism, so as to avoid the phenomenon that the inflating hose is too short and causes insufficient inflating distance, and the inflating hose can be rolled up after the inflating is completed, so as to prevent the inflating hose from occupying space due to being too long;

[0004] The above-mentioned hydrogen filling device does have certain convenience advantages in practical applications. However, in the specific use links, especially when filling the hydrogen tank, it has obvious shortcomings. The device lacks a special positioning mechanism, which means that the hydrogen tank cannot be effectively fixed during the production and processing process. If the filling gun accidentally falls off during inflation, the hydrogen tank is very likely to splash violently, which is a huge safety hazard for the surrounding staff and can easily cause them to be injured. Moreover, since the hydrogen tank is not positioned during the processing, accurate filling operations cannot be achieved. It is difficult to ensure accuracy in both the filling position and the filling amount. It can be seen that the device has defects in the overall design and processing that cannot be ignored, and it is necessary and urgent to improve it. Summary of the invention

[0005] The object of the present invention is to provide a hydrogen filling device with an adjustable positioning structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides a hydrogen filling device with an adjustable positioning structure, comprising a hydrogen filling machine, a bottom plate fixedly installed on the front side of the hydrogen filling machine, a shifting mechanism fixedly installed on the upper end of the front side of the hydrogen filling machine, a connecting hose fixedly installed on the top of the hydrogen filling machine, a concave tube fixedly installed on the front end of the connecting hose, an electric push rod installed on the bottom of the concave tube by bolts, a filling gun installed on the bottom of the electric push rod by bolts, the top of the filling gun is connected to the output end of the connecting hose through a hose, the concave tube is connected to the shifting mechanism, a rotating mechanism is fixedly installed on the bottom plate and the front end of the shifting mechanism, and a positioning mechanism is fixedly installed on the inner side of the rotating mechanism at equal intervals;

[0007] The positioning mechanism includes a fixed arm, which is fixedly installed on the inner side of the rotating mechanism at equal intervals. An adjustment component is fixedly installed on the outer side of the fixed arm. A limiting disk is fixedly installed on the outer upper end of the adjustment component. A limiting circular groove is provided in the middle of the limiting disk. A receiving component is fixedly installed on the outer lower end of the adjustment mechanism.

[0008] Furthermore, the adjustment mechanism includes a front rail, which is fixedly installed on the upper front end of the hydrogen filling machine, and a first motor is fixedly installed on the front end of the front rail. The output end of the first motor passes through the front rail and a first screw is fixedly installed. The first screw is rotatably connected to the inside of the front rail, and a slider is threadedly connected to the outer surface of the first screw, and the concave tube is fixedly installed on the outside of the slider.

[0009] Furthermore, the rotating mechanism includes a top plate and a bottom plate, the top plate is fixedly mounted on the front end of the front rail, the bottom plate is fixedly mounted on the front end of the bottom plate, a second motor is fixedly mounted on the top of the top plate, a turntable is rotatably connected to the inner sides of the top plate and the bottom plate, an output end of the second motor passes through the top plate and is connected to the top plate at the top, and the fixed arms are arranged in a ring shape at equal intervals and fixedly mounted on the inner side of the turntable.

[0010] Furthermore, the adjustment assembly includes a side rail, which is fixedly installed on the outside of the fixed arm, and a third motor is fixedly installed on the top of the side rail. The output end of the third motor passes through the side rail and a second screw is fixedly installed, and the second screw is rotatably connected to the inside of the side rail. The threads at both ends of the second screw have opposite rotation directions, and both ends of the second screw are threadedly connected to movable blocks, the limit plate is fixedly installed on the outside of the movable block at the top, and the receiving assembly is fixedly installed on the outside of the movable block at the bottom.

[0011] Furthermore, the receiving assembly includes a receiving plate, which is fixedly installed on the outside of the movable block located at the bottom, and frames are fixedly installed on both sides of the receiving plate. The inner outer end of the frame is fixedly connected to a limiting spring, and a sliding block is fixedly installed on the end of the limiting spring. A limiting arm is fixedly installed on the top of the sliding block, and a limiting groove is provided on the inner side of the limiting arm, and the limiting groove is V-shaped when viewed from above.

[0012] Furthermore, the overall cross-sectional shape of the limiting circular groove is set to be an isosceles trapezoid, and the inner wall of the side rail and the movable block are set to be a convex shape when viewed from above.

[0013] Furthermore, a maintenance slot is provided on the side of the hydrogen filling machine, and a maintenance door is installed inside the maintenance slot by bolts.

[0014] Furthermore, a placement seat is fixedly installed at the bottom of the hydrogen filling machine, and the overall cross-sectional shape of the upper end of the placement seat is an isosceles trapezoid.

[0015] Furthermore, the bottom of the placement seat is fixedly connected with anti-skid protrusions at equal intervals, and the front end of the outer side of the inspection door is provided with a groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] First, in the present invention, the efficiency of hydrogen filling is improved by setting a rotating and shifting mechanism. When using the device, the hydrogen tank is first placed inside the positioning mechanism and started to assist in positioning. Then the shifting mechanism is started. The first motor drives the first screw rod to slide the slider in the front rail, driving the concave tube and the filling gun, so that the filling gun is above the hydrogen tank. The electric push rod pushes the filling gun to cover the gas valve to start filling. After filling, the electric push rod retracts, and the second motor drives the turntable to replace the positioning mechanism. During the whole process, each positioning mechanism can be flexibly adjusted to achieve continuous and rapid hydrogen filling.

[0018] Secondly, in the present invention, when in use, the hydrogen tank is placed on the top of the receiving plate, the limit spring resets and pushes the sliding block, driving the limit arm, and combined with the inclined guide of the V-shaped limit groove, so that the hydrogen tank is centered, and then the third motor drives the second screw rod to rotate. Because the threads at both ends of the screw rod rotate in opposite directions, the movable block is driven to slide in the side rail. The two movable blocks cause the limit plate and the receiving plate to move, and the hydrogen tank valve is inserted into the limit circular groove with an isosceles trapezoidal cross-section. This adjustable design can flexibly and stably clamp hydrogen tanks of different sizes, thereby improving the efficiency and convenience of equipment filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2It is a schematic diagram of the top view structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure in the present invention when viewed from above;

[0022] Figure 4 It is a schematic diagram of the structure of the rotating mechanism, the shifting mechanism and the positioning mechanism in the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the transfer mechanism in the present invention;

[0024] Figure 6 It is a schematic diagram of the positioning mechanism structure in the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the receiving component in the present invention.

[0026] In the figure: 1. hydrogen filling machine; 2. bottom plate; 3. rotating mechanism; 31. top plate; 32. bottom plate; 33. second motor; 34. turntable; 4. connecting hose; 5. concave tube; 6. electric push rod; 7. transfer mechanism; 71. front rail; 72. first motor; 73. first screw rod; 74. slider; 8. filling gun; 9. positioning mechanism; 91. fixed arm; 92. receiving assembly; 921. receiving plate; 922. frame; 923. limit spring; 924. sliding block; 925. limit arm; 926. limit groove; 93. limit plate; 94. limit circular groove; 95. transfer assembly; 951. side rail; 952. third motor; 953. second screw rod; 954. movable block; 10. inspection notch; 11. inspection door; 12. placement seat. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 7In an embodiment of the present invention, a hydrogen filling device with an adjustable positioning structure includes a hydrogen filling machine 1, a bottom plate 2 is fixedly installed on the front side of the hydrogen filling machine 1, a shifting mechanism 7 is fixedly installed on the upper end of the front side of the hydrogen filling machine 1, a connecting hose 4 is fixedly installed on the top of the hydrogen filling machine 1, a concave tube 5 is fixedly installed on the front end of the connecting hose 4, an electric push rod 6 is installed on the bottom of the concave tube 5 by bolts, a filling gun 8 is installed on the bottom of the electric push rod 6 by bolts, the top of the filling gun 8 is connected to the output end of the connecting hose 4 through a hose, the concave tube 5 is connected to the shifting mechanism 7, a rotating mechanism 3 is fixedly installed on the bottom plate 2 and the front end of the shifting mechanism 7, and a positioning mechanism 9 is fixedly installed on the inner side of the rotating mechanism 3 at equal intervals;

[0029] The positioning mechanism 9 includes a fixed arm 91, which is fixedly installed on the inner side of the rotating mechanism 3 at equal intervals. An adjustment component 95 is fixedly installed on the outer side of the fixed arm 91. A limit plate 93 is fixedly installed on the upper end of the outer side of the adjustment component 95. A limit circular groove 94 is provided in the middle of the limit plate 93. A receiving component 92 is fixedly installed on the lower end of the outer side of the adjustment mechanism 7. The adjustment mechanism 7, the rotating mechanism 3 and the positioning mechanism 9 cooperate with each other. The fixed arm 91 and the adjustment component 95 in the positioning mechanism 9 can be flexibly adjusted. The limit circular groove 94 on the limit plate 93 can effectively limit the hydrogen tank. The adjustment mechanism 7 can accurately control the position of the filling gun 8 through the synergistic effect of the connecting hose 4, the concave tube 5, the electric push rod 6 and the filling gun 8, so as to facilitate the hydrogen filling operation. The rotating mechanism 3 can realize the flexible conversion of the positioning mechanism 9, which is convenient for continuous operation. This device as a whole can improve the hydrogen filling efficiency, adapt to the positioning and filling requirements of hydrogen tanks of different specifications, and is convenient to operate and has strong stability.

[0030] See also Figure 1-Figure 5The adjustment mechanism 7 includes a front rail 71, which is fixedly installed at the upper front end of the hydrogen filling machine 1. A first motor 72 is fixedly installed at the front end of the front rail 71. The output end of the first motor 72 passes through the front rail 71 and is fixedly installed with a first screw rod 73. The first screw rod 73 is rotatably connected to the inside of the front rail 71. The outer surface of the first screw rod 73 is threadedly connected with a slider 74. The concave tube 5 is fixedly installed on the outside of the slider 74. The rotating mechanism 3 includes a top plate 31 and a bottom plate 32. The top plate 31 is fixedly installed at the front end of the front rail 71, and the bottom plate 32 is fixedly installed at the front end of the bottom plate 2. A second motor 33 is fixedly installed on the top of the top plate 31. The inner sides of the top plate 31 and the bottom plate 32 are both rotatably connected with a turntable 34. The output end of the second motor 33 passes through the top plate 3 1 is connected to the top plate 31 at the top, the fixed arms 91 are arranged in a ring shape with equal spacing and fixedly installed on the inner side of the turntable 34, the first motor 72 drives the first screw rod 73 to rotate in the front rail 71, so that the slider 74 connected by the thread can move accurately, thereby driving the concave tube 5 and related components, and realizing the accurate adjustment of the position of the filling gun 8. The top plate 31 and the bottom plate 32 of the rotating mechanism 3 cooperate, and the second motor 33 drives the turntable 34 to rotate. Since the fixed arms 91 are arranged in a ring shape with equal spacing on the inner side of the turntable 34, the device can flexibly switch components at different positions during operation, which is convenient for continuous operation of multiple hydrogen tanks and improves work efficiency. The overall structural design is compact and the various parts work together, which effectively enhances the functionality and practicality of the device.

[0031] See also Figure 1-Figure 4The adjustment component 95 includes a side rail 951, which is fixedly installed on the outer side of the fixed arm 91. A third motor 952 is fixedly installed on the top of the side rail 951. The output end of the third motor 952 passes through the side rail 951 and is fixedly installed with a second screw rod 953. The second screw rod 953 is rotatably connected to the inside of the side rail 951. The threads of the two ends of the second screw rod 953 are rotated in opposite directions. Both ends of the second screw rod 953 are threadedly connected with a movable block 954. The limit plate 93 is fixedly installed on the outer side of the movable block 954 at the top. The receiving component 92 is fixedly installed on the outer side of the movable block 954 at the bottom. The receiving component 92 includes a receiving plate 921, which is fixedly installed on the outer side of the movable block 954 at the bottom. A frame 922 is fixedly installed on both sides of the receiving plate 921. The inner outer end of the frame 922 is fixedly connected to a limit spring 923. The end of the limit spring 923 is fixedly installed with a sliding block 924. The top of the sliding block 924 is fixed A limit arm 925 is fixedly installed, and a limit slot 926 is provided on the inner side of the limit arm 925. The limit slot 926 is V-shaped when viewed from above. In the adjustment component 95, the third motor 952 drives the second screw rod 953 to rotate in the side rail 951. Since the threads at both ends of the second screw rod 953 rotate in opposite directions, the movable blocks 954 at both ends can move relative to or oppositely, thereby driving the limit plate 93 and the receiving component 92 to flexibly adjust their positions, and the receiving plate in the receiving component 92 The frames 922 on both sides of 921 cooperate well with the limit springs 923, sliding blocks 924, limit arms 925 and other components. When the hydrogen tank is placed on the receiving plate 921, the limit springs 923 enable the sliding blocks 924 to drive the limit arms 925 to move. In addition, the V-shaped limit grooves 926 can not only provide a good centering guide for the hydrogen tank, but also adapt to hydrogen tanks of different sizes, thereby improving the overall adaptability of the device to hydrogen tanks and the convenience of operation.

[0032] See also Figure 1-Figure 4 and Figure 6The overall cross-sectional shape of the limiting circular groove 94 is set in an isosceles trapezoidal shape. The inner wall of the side rail 951 and the top view shape of the movable block 954 are both set in a convex shape. An inspection slot 10 is provided on the side of the hydrogen filling machine 1. An inspection door 11 is installed inside the inspection slot 10 by bolts. A placement seat 12 is fixedly installed at the bottom of the hydrogen filling machine 1. The overall cross-sectional shape of the upper end of the placement seat 12 is set in an isosceles trapezoidal shape. The bottom of the placement seat 12 is fixedly connected with anti-slip protrusions at equal intervals. A groove is provided on the front end of the outer side of the inspection door 11. The limiting circular groove 94 is set in an isosceles trapezoidal shape. It can assist in limiting the hydrogen tank more stably. The inner wall of the side rail 951 and the movable block 954 are convex in shape when viewed from above, so that the movable block 954 can move more smoothly and accurately. The hydrogen filling machine 1 has an inspection slot 10 and an inspection door 11 installed to facilitate internal maintenance and inspection. The isosceles trapezoidal cross-section design of the bottom placement seat 12 increases stability, and the equally spaced anti-slip protrusions on the bottom can effectively prevent slipping. The groove at the front end of the outer side of the inspection door 11 facilitates the opening of the inspection door 11. These designs make the entire device outstanding in terms of functionality, stability and maintenance convenience.

[0033] The working principle of the present invention is as follows: in the present invention, by setting the rotating mechanism 3 and the adjusting mechanism 7, when the present device is actually used, the hydrogen tank to be inflated can be first placed on the inner side of the positioning mechanism 9, and then the positioning mechanism 9 is started to run, which can assist in positioning the hydrogen tank, and then the adjusting mechanism 7 is started. At this time, the first motor 72 starts to drive the first screw rod 73 to rotate, and the rotation of the first screw rod 73 can assist in driving the slider 74 to slide on the inner side of the front rail 71. As the slider 74 slides inside the front rail 71, the concave tube 5 can be driven to move accordingly, and the movement of the concave tube 5 can further assist in driving the filling gun 8 to move to the position just above the hydrogen tank. At this time, the electric motor 72 is started to drive the first screw rod 73 to rotate. The rotation of the first screw rod 73 can assist in driving the slider 74 to slide on the inner side of the front rail 71. As the slider 74 slides inside the front rail 71, the concave tube 5 can be driven to move accordingly, and the movement of the concave tube 5 can further assist in driving the filling gun 8 to move to the position just above the hydrogen tank. The push rod 6 pushes the filling gun 8 to move downward so that it is sleeved on the outside of the gas valve on the top of the hydrogen tank. Then, the hydrogen filling machine 1 is started to run, and the hydrogen filling operation can be started. When the filling is completed, the electric push rod 6 is retracted, and then the second motor 33 is started to drive the turntable 34 to rotate. The rotation of the turntable 34 can transfer and replace each positioning mechanism 9. From the whole process, each positioning mechanism 9 in the device can be flexibly adjusted. During the filling process, the hydrogen tank that has been filled can be removed, and a new hydrogen tank can be installed at the same time to perform a cyclic operation, thereby realizing a continuous, uninterrupted and rapid hydrogen filling process, which plays a significant role in improving the overall hydrogen filling efficiency of the device.

[0034] By setting the positioning mechanism 9, the hydrogen tank can be placed on the top of the receiving plate 921 during use of the device. At this time, the limit spring 923 is reset, and its elastic force resists the sliding block 924 from moving inward. The inward movement of the sliding block 924 can assist in driving the limit arm 925 to push the hydrogen tank. Since the interior of the limit groove 926 is provided with an inclined guide, and the limit groove 926 is V-shaped, such a design can enable the limit groove 926 to have a centering guiding effect on the hydrogen tank, so that the hydrogen tank can be accurately placed in the center on the top of the receiving plate 921. Then the third motor 952 is started to run, and the third motor 952 drives the second screw rod 953 inside the side rail 951 to rotate. It should be noted that the threads at both ends of the second screw rod 953 are rotated in the same direction. On the contrary, the rotation of the second screw rod 953 can drive the movable block 954 to slide inside the side rail 951, and the rotation of the third screw rod can synchronously drive the two movable blocks 954 to move. The displacement of the two movable blocks 954 will drive the limit plate 93 and the receiving plate 921 to move relative to each other, so that the gas valve on the top of the hydrogen tank can be inserted into the limit circular groove 94. Since the overall cross-section of the limit circular groove 94 is an isosceles trapezoid, the limit circular groove 94 can play an auxiliary limiting role on the top of the hydrogen tank. In summary, the overall adjustable design of the device is flexible and stable, and can clamp and position hydrogen tanks of different sizes. This is of great significance for improving the efficiency and convenience of the equipment during the hydrogen filling process.

Claims

1. A hydrogen filling device with an adjustable positioning structure, characterized in that: It comprises a hydrogen filling machine, wherein a bottom plate is fixedly installed on the front side of the hydrogen filling machine, a shifting mechanism is fixedly installed on the upper end of the front side of the hydrogen filling machine, a connecting hose is fixedly installed on the top of the hydrogen filling machine, a concave tube is fixedly installed on the front end of the connecting hose, an electric push rod is installed on the bottom of the concave tube by bolts, a filling gun is installed on the bottom of the electric push rod by bolts, the top of the filling gun is connected to the output end of the connecting hose through a hose, the concave tube is connected to the shifting mechanism, a rotating mechanism is fixedly installed on the bottom plate and the front end of the shifting mechanism, and a positioning mechanism is fixedly installed on the inner side of the rotating mechanism at equal intervals; The positioning mechanism includes a fixed arm, which is fixedly installed on the inner side of the rotating mechanism at equal intervals. An adjustment component is fixedly installed on the outer side of the fixed arm. A limiting disk is fixedly installed on the outer upper end of the adjustment component. A limiting circular groove is provided in the middle of the limiting disk. A receiving component is fixedly installed on the outer lower end of the adjustment mechanism.

2. The hydrogen filling device with an adjustable positioning structure according to claim 1, characterized in that: The adjustment mechanism includes a front rail, which is fixedly installed on the upper front end of the hydrogen filling machine. A first motor is fixedly installed on the front end of the front rail. The output end of the first motor passes through the front rail and a first screw is fixedly installed. The first screw is rotatably connected to the inside of the front rail. A slider is threadedly connected to the outer surface of the first screw, and the concave tube is fixedly installed on the outside of the slider.

3. The hydrogen filling device with an adjustable positioning structure according to claim 2, characterized in that: The rotating mechanism includes a top plate and a bottom plate, the top plate is fixedly mounted on the front end of the front rail, the bottom plate is fixedly mounted on the front end of the bottom plate, a second motor is fixedly mounted on the top of the top plate, a turntable is rotatably connected to the inner sides of the top plate and the bottom plate, an output end of the second motor passes through the top plate and is connected to the top plate at the top, and the fixed arms are arranged in a ring shape at equal intervals and fixedly mounted on the inner side of the turntable.

4. The hydrogen filling device with an adjustable positioning structure according to claim 3, characterized in that: The adjustment assembly includes a side rail, which is fixedly installed on the outside of the fixed arm, a third motor is fixedly installed on the top of the side rail, an output end of the third motor passes through the side rail and a second screw is fixedly installed, the second screw is rotatably connected to the inside of the side rail, the threads at both ends of the second screw are rotated in opposite directions, both ends of the second screw are threadedly connected to a movable block, the limit plate is fixedly installed on the outside of the movable block at the top, and the receiving assembly is fixedly installed on the outside of the movable block at the bottom.

5. The hydrogen filling device with an adjustable positioning structure according to claim 4, characterized in that: The receiving assembly includes a receiving plate, which is fixedly installed on the outside of the movable block located at the bottom. Frames are fixedly installed on both sides of the receiving plate. The inner outer end of the frame is fixedly connected to a limiting spring. A sliding block is fixedly installed on the end of the limiting spring. A limiting arm is fixedly installed on the top of the sliding block. A limiting groove is provided on the inner side of the limiting arm, and the limiting groove is V-shaped when viewed from above.

6. The hydrogen filling device with an adjustable positioning structure according to claim 5, characterized in that: The overall cross-sectional shape of the limiting circular groove is arranged in an isosceles trapezoid, and the inner wall of the side rail and the movable block are arranged in a convex shape when viewed from above.

7. The hydrogen filling device with an adjustable positioning structure according to claim 1, characterized in that: A maintenance slot is provided on the side of the hydrogen filling machine, and a maintenance door is installed inside the maintenance slot by bolts.

8. The hydrogen filling device with an adjustable positioning structure according to claim 7, characterized in that: A placement seat is fixedly installed at the bottom of the hydrogen filling machine, and the overall cross-sectional shape of the upper end of the placement seat is an isosceles trapezoid.

9. The hydrogen filling device with an adjustable positioning structure according to claim 8, characterized in that: The bottom of the placement seat is fixedly connected with anti-skid protrusions at equal intervals, and a groove is provided at the front end of the outer side of the inspection door.

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