Placing support for LNG vehicle-mounted gas cylinder for heavy-duty car and using method of placing support

Abstract

The invention provides a placing support for an LNG vehicle-mounted gas cylinder for a heavy-duty car and a using method of the placing support, and relates to the technical field of vehicle-mounted gas cylinders. The placing support comprises support bases, support stand columns are fixedly connected to the upper portions of the support bases, and arc opening supporting plates are connected between every two transversely adjacent support bases in a welded mode; two parallel gas cylinder supporting rollers are fixedly connected between the front arc opening supporting plate and the rear arc opening supporting plate, the axes of the gas cylinder supporting rollers are perpendicular to the arc opening supporting plates, an adjusting worm is rotated through a worm handle, the adjusting worm drives a rotating shaft worm gear to rotate through worm gear and worm transmission, a gas cylinder lock belt is pulled leftwards through meshing of insections and lock belt lock teeth, and the gas cylinder lock belt is locked. The tightening strength of the gas cylinder locking belt is further improved, the LNG vehicle-mounted gas cylinder is further locked, the tightening state of the gas cylinder locking belt is maintained when the LNG vehicle-mounted gas cylinder is locked, and the problems that the gas cylinder overhauling and maintaining process is tedious, and the locking strength of the gas cylinder is affected due to the fact that slight looseness is likely to happen in the strap fixing process are solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted gas cylinder technology, and in particular to a placement bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles and its usage method. Background Technology

[0002] LNG vehicles, also known as natural gas vehicles, are cars primarily powered by fuels. LNG vehicles are equipped with LNG cylinders that store natural gas. The LNG cylinders are fixed to the vehicle by cylinder racks made of high-strength steel or aluminum alloy and secured to the supports with hoops to prevent displacement or damage during transportation due to vibration, impact, or bumps.

[0003] In traditional LNG vehicle-mounted cylinder placement brackets, LNG vehicle-mounted cylinders are secured with hoops. During the hooping process, the ends of the hoops need to be fixed by locking structures on both sides of the bracket. During the operation, it is necessary to ensure that the hoops are in close contact with the outer surface of the cylinder and keep the hoops taut. The operation is quite difficult, the steps are cumbersome and inefficient, resulting in complicated cylinder inspection and maintenance processes. Slight loosening of the hoops is also prone to occur during the fixing process, which affects the locking strength of the cylinder. Summary of the Invention

[0004] This invention provides a placement bracket for LNG vehicle-mounted gas cylinders used in heavy-duty vehicles and its usage method. This addresses the problems of traditional LNG vehicle-mounted gas cylinder placement brackets, which use hoops to secure the gas cylinders. During the hooping process, locking structures on both sides of the bracket are needed to fix the ends of the hoops, ensuring a tight fit between the hoops and the outer surface of the gas cylinder while maintaining tautness. This process is difficult, cumbersome, and inefficient, leading to complicated gas cylinder inspection and maintenance. Furthermore, slight loosening of the hoops during fixation can affect the locking strength of the gas cylinder.

[0005] This invention provides a support bracket for LNG vehicle-mounted gas cylinders in heavy-duty vehicles and its usage method. Specifically, it includes: a bracket base; a bracket column fixedly connected to the top of the bracket base; two horizontally adjacent bracket bases connected by an arc-shaped support plate welded together; two parallel gas cylinder support rollers fixedly connected between the front and rear arc-shaped support plates, the axis of the gas cylinder support rollers being perpendicular to the arc-shaped support plate; an adjusting worm gear rotatably connected to the front surface of the left front bracket base via a bearing, the axis of the adjusting worm gear being perpendicular to the left surface of the bracket base; and a synchronous rotating shaft rotatably connected between the two left-side bracket bases via a bearing, the synchronous rotating shaft being equipped with two unidirectional... The unidirectional rotating cylinder has a ratchet and pawl mechanism with the pawl facing counterclockwise when viewed from the front. The outer surface of the unidirectional rotating cylinder has teeth. The front end of the synchronous rotating shaft is fixedly connected to a rotating shaft worm gear, which meshes with an adjusting worm. Upper support rods are installed between the two left and two right support columns. The left upper support rod is fixedly connected to a locking belt limiter by bolts. The lower surface of the locking belt limiter has an arc-shaped limit groove, which is coaxial with the synchronous rotating shaft. The right upper support rod is fixedly installed with a gas cylinder locking belt by bolts. The lower surface of the gas cylinder locking belt has locking teeth, and the gas cylinder locking belt fits against the groove surface of the limit arc groove and the outer surface of the unidirectional rotating cylinder.

[0006] Furthermore, the two support columns on the left are connected by welding to a lower support frame and a middle support frame, and the two support columns on the right are connected by welding to a lower support frame and a middle support frame.

[0007] Furthermore, an arc-shaped opening is provided above the arc-shaped support plate, and two support roller shaft grooves are provided in the arc-shaped opening of the arc-shaped support plate.

[0008] Furthermore, a groove baffle is movably inserted inside the support roller groove, and the groove baffle is connected to the inner groove surface of the support roller groove by screws.

[0009] Furthermore, the two ends of the cylinder support roller are located inside the support roller shaft groove, and the lower surface of the shaft groove baffle is in close contact with the outer surface of the cylinder support roller shaft.

[0010] Furthermore, a docking rod is fixedly connected to the top of the support column, and a limit wedge is fixedly connected to the top of the docking rod. The docking rod is perpendicular to the upper end face of the support column.

[0011] Furthermore, the two ends of the bracket base are provided with mating ports, and the inside of the end of the bracket base is provided with a locking rod groove, which is perpendicular to the mating ports.

[0012] Furthermore, a docking locking rod is rotatably connected inside the locking rod groove. The outer end of the docking locking rod is machined with a wedge surface, and the inner end of the docking locking rod is fixedly connected with a locking rod guide plate. A locking rod top spring is fixedly connected between the locking rod guide plate and the inner end face of the locking rod groove.

[0013] Furthermore, the support base has a push plate guide opening extending through the front and rear ends, the push plate guide opening is connected to the locking rod slide groove, and the locking rod guide plate is slidably connected to the push plate guide opening.

[0014] This invention provides a mounting bracket for LNG vehicle-mounted gas cylinders in heavy-duty vehicles and its usage method, which has the following beneficial effects: The LNG vehicle-mounted gas cylinder placement bracket of this invention improves the locking structure of the clamp strap. Through the cooperation of the clamp strap limiting bracket and the one-way rotating cylinder, the gas cylinder clamp strap is tightened. Simultaneously, in the taut state of the gas cylinder clamp strap, the ratchet and pawl mechanism between the one-way rotating cylinder and the synchronous rotating shaft is locked by a reverse torque. This, combined with the engagement of the teeth on the outer surface of the one-way rotating cylinder with the locking teeth of the clamp strap, ensures one-way locking of the gas cylinder clamp strap. Furthermore, the cooperation of the adjusting worm and the rotating shaft worm wheel, with the worm handle rotating the adjusting worm, causes the adjusting worm to drive the rotating shaft worm wheel to rotate via the worm wheel transmission. When the rotating shaft worm wheel and the synchronous rotating shaft rotate counterclockwise, the one-way rotating cylinder rotates counterclockwise, and through the engagement of the teeth with the locking teeth of the clamp strap, it pulls the gas cylinder clamp strap to the left, further increasing the tension of the clamp strap and further locking the LNG vehicle-mounted gas cylinder, maintaining the taut state of the clamp strap when locking the LNG vehicle-mounted gas cylinder.

[0015] Furthermore, by installing a one-way rotating cylinder through a ratchet and pawl mechanism, the cylinder rotates as the left end of the cylinder lock strap is pulled to the left while it is in a loose state. This allows for the rapid tightening of the cylinder lock strap to a preliminary tension state, and the ratchet and pawl mechanism automatically locks it in this preliminary tension state. This eliminates the need to slowly adjust the tension of the cylinder lock strap by rotating the worm gear multiple times, reducing the complexity of cylinder lock strap installation and improving cylinder locking efficiency.

[0016] In addition, a quick-connect multi-layer docking structure is provided. When it is necessary to increase the number of LNG cylinders, the two sets of brackets can be spliced ​​longitudinally. The docking rod and the limiting wedge of the lower bracket are inserted into the docking port of the upper bracket and docked with the docking locking rod. This enables the rapid longitudinal splicing of the two sets of placement racks, which is beneficial to improving the efficiency of vehicle modification and facilitating the expansion of LNG storage capacity.

[0017] In addition, the cylindrical gas cylinder is effectively supported by two sets of cylinder support rollers. With the assistance of the cylinder locking strap, the cylinder is locked in three directions. This locking structure is suitable for gas cylinders of different diameters, which improves the applicability of the gas cylinder placement rack for placing gas cylinders of different diameters. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2 This application shows Figure 1 A structural diagram from the right-hand perspective; Figure 3 This diagram shows the structure of the present application in its stacked state; Figure 4 A schematic diagram of the structure of this application under no-load conditions is shown; Figure 5 A schematic diagram of the arc-shaped support plate of this application is shown; Figure 6 A schematic diagram of the worm gear of the rotating shaft of this application is shown; Figure 7 This paper shows a schematic diagram of the internal structure of the mating interface of this application; Figure 8 A schematic diagram of the front view structure of this application is shown; Figure 9 This application shows Figure 2 A magnified structural diagram of point A in the middle; Figure 10 This application shows Figure 3 A magnified structural diagram of point B in the middle section; Figure 11 This application shows Figure 4 A magnified structural diagram of point C in the middle; Figure 12 This application shows Figure 6 A magnified structural diagram of a portion of point D in the middle; Figure 13 This application shows Figure 7 A magnified structural diagram of a portion of point E in the middle.

[0021] Figure label: 1. Support base; 101. Connecting socket; 102. Locking rod slide groove; 103. Push plate guide; 104. Connecting locking rod; 105. Locking rod guide plate; 106. Locking rod top spring; 2. Support column; 201. Connecting rod; 202. Limiting wedge; 203. Lower support frame; 204. Middle support frame; 205. Upper support rod; 206. Locking belt limiting frame; 207. Limiting arc groove; 3. Arc-shaped support plate; 301. Support roller shaft groove; 302. Shaft groove baffle; 4. Gas cylinder support roller; 5. Adjusting worm gear; 501. Worm gear handle; 6. Synchronous rotating shaft; 601. Rotating shaft worm wheel; 602. One-way rotating cylinder; 7. Gas cylinder locking belt; 701. Locking belt locking teeth. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1 to 13 : This invention proposes a support bracket for LNG vehicle-mounted gas cylinders in heavy-duty vehicles and its usage method, comprising: a support base 1, a support column 2 fixedly connected to the top of the support base 1, an arc-shaped support plate 3 welded between two horizontally adjacent support bases 1, two parallel gas cylinder support rollers 4 fixedly connected between the front and rear arc-shaped support plates 3, the axis of the gas cylinder support rollers 4 being perpendicular to the arc-shaped support plates 3, an adjusting worm gear 5 rotatably connected to the front surface of the left front support base 1 via a bearing, the axis of the adjusting worm gear 5 being perpendicular to the left surface of the support base 1, and a synchronous rotating shaft 6 rotatably connected between the two left support bases 1 via a bearing. 6. Two one-way rotating cylinders 602 are installed via a ratchet and pawl mechanism. The pawls in the ratchet and pawl mechanism of the one-way rotating cylinder 602 face counterclockwise when viewed from the front. The outer surface of the one-way rotating cylinder 602 is provided with teeth. The front end of the synchronous rotating shaft 6 is fixedly connected to a rotating shaft worm gear 601, which meshes with an adjusting worm 5. Upper support rods 205 are installed between the two left support columns 2 and the two right support columns 2. The left upper support rod 205 is fixedly connected to a locking belt limiter 206 by bolts. The lower surface of the locking belt limiter 206 is provided with an arc-shaped limiting groove 207, which is coaxial with the synchronous rotating shaft 6. The right upper support rod 205 is fixedly connected to a locking belt limiter 206 by bolts. The lower surface of the locking belt limiter 206 is provided with an arc-shaped limiting groove 207, which is coaxial with the synchronous rotating shaft 6. 5. A gas cylinder locking strap 7 is fixedly installed by bolts. The lower surface of the gas cylinder locking strap 7 is provided with locking teeth 701. The gas cylinder locking strap 7 fits against the groove surface of the limiting arc groove 207 and the outer surface of the one-way rotating cylinder 602. The gas cylinder locking strap 7 is limited by the cooperation of the locking strap limiting bracket 206 and the one-way rotating cylinder 602. When the gas cylinder locking strap 7 is taut, the ratchet and pawl mechanism between the one-way rotating cylinder 602 and the synchronous rotating shaft 6 is locked by the reverse torque. The teeth on the outer surface of the one-way rotating cylinder 602 mesh with the locking teeth 701, so that the gas cylinder locking strap 7 is locked in one direction. This can keep the gas cylinder locking strap 7 taut during the gas cylinder fixing process. It works in conjunction with the adjusting worm 5 and the rotating shaft worm wheel 601. The function is to rotate the worm handle 501 to drive the adjusting worm 5 to rotate, so that the adjusting worm 5 drives the rotating shaft worm wheel 601 to rotate through the worm gear transmission. When the rotating shaft worm wheel 601 and the synchronous rotating shaft 6 rotate counterclockwise, the one-way rotating cylinder 602 rotates counterclockwise. Through the meshing of the teeth and the locking teeth 701, the cylinder locking strap 7 is pulled to the left, further improving the tension of the cylinder locking strap 7 and further locking the LNG vehicle cylinder. This maintains the tension of the cylinder locking strap 7 when locking the LNG vehicle cylinder, solving the problem that the traditional cylinder placement rack is prone to slight loosening during the fixing process of the hoop, which affects the locking strength of the cylinder.

[0024] In this embodiment, a lower support frame 203 and a middle support frame 204 are welded together between the two support columns 2 on the left, and a lower support frame 203 and a middle support frame 204 are welded together between the two support columns 2 on the right. The arrangement of the lower support frame 203 and the middle support frame 204 strengthens the shape of the placement rack and improves the load-bearing stability of the placement rack.

[0025] In this embodiment, an arc-shaped opening is provided above the arc-shaped support plate 3, and two support roller shaft grooves 301 are provided in the arc-shaped opening of the arc-shaped support plate 3. A shaft groove baffle 302 is movably inserted into the support roller shaft groove 301. The shaft groove baffle 302 is connected to the inner groove surface of the support roller shaft groove 301 by screws. The two ends of the shaft of the gas cylinder support roller 4 are located inside the support roller shaft groove 301. The lower surface of the shaft groove baffle 302 is in close contact with the outer surface of the shaft of the gas cylinder support roller 4. The support roller shaft groove 301 and the shaft groove baffle 302 are connected to each other. The design facilitates the disassembly of the gas cylinder support roller 4, making it convenient for maintenance and upkeep. This includes cleaning dust and impurities from the outer surface of the support roller 4 and replacing the hardened rubber coating. The two sets of support rollers 4 effectively support the cylindrical gas cylinder. Combined with the gas cylinder locking strap 7, this achieves three-way locking of the gas cylinder. This locking structure is suitable for gas cylinders of different diameters, expanding the applicability of the gas cylinder rack for placing gas cylinders of various sizes.

[0026] In Embodiment Two, based on Embodiment One, a docking rod 201 is fixedly connected to the top of the support column 2, and a limit wedge 202 is fixedly connected to the top of the docking rod 201. The docking rod 201 is perpendicular to the upper end face of the support column 2. The support base 1 has docking ports 101 on both ends, and a locking rod groove 102 is formed inside the end of the support base 1, perpendicular to the docking ports 101. A docking locking rod 104 is rotatably connected inside the locking rod groove 102. The outer end of the docking locking rod 104 is machined with a wedge surface, and a locking rod guide plate 105 is fixedly connected to the inner end of the docking locking rod 104. A locking rod top spring 106 is fixedly connected between the locking rod guide plate 105 and the inner end face of the locking rod groove 102. A push plate guide port 103 is formed through the front and rear of the end of the support base 1, communicating with the locking rod groove 102. The locking rod guide plate 105 is slidably connected to the push plate guide port 103. Due to the requirements of vehicle operating conditions, when expanding the capacity of LNG fuel, two placement racks can be longitudinally assembled into a double-layer placement rack. When splicing two longitudinally adjacent gas cylinder placement racks, the other placement rack is hoisted to the top of the bottom placement rack and slowly lowered using a hoisting device. This allows the docking rod 201 and the limiting wedge 202 of the lower bracket to be inserted into the docking slot 101 of the upper bracket. Under the action of the inclined surface of the limiting wedge 202 and the docking locking rod 104, the docking locking rod 104 is pushed into the push plate guide 103 and the locking rod top spring 106 is compressed. When the limiting wedge 202 is at the top of the docking locking rod 104, the docking locking rod 104 moves outward under the elastic force of the locking rod top spring 106 and inserts below the limiting wedge 202, thus limiting the limiting wedge 202. This achieves a stable docking of the upper and lower placement racks, enabling rapid longitudinal splicing of the two sets of placement racks and improving the efficiency of vehicle modification.

[0027] Working Principle: First, during the installation of the LNG cylinder, the LNG cylinder is placed above the two cylinder support rollers 4 inside the placement frame, so that the cylinder contacts the two cylinder support rollers 4. Supported by the two cylinder support rollers 4, the left end of the cylinder locking strap 7 is inserted from right to left between the one-way rotating cylinder 602 and the locking strap limiter 206, and then pulled to the left, so that the cylinder locking strap 7 is tightly fitted to the outer surface of the cylinder, achieving a pre-tensioned state. At this time, under the elastic force of the cylinder locking strap 7, it retracts to the right, causing the ratchet and pawl mechanism between the one-way rotating cylinder 602 and the support base 1 to be locked by a reverse torque, further tightening the cylinder locking strap 7. The worm 5 is adjusted by rotating the worm handle 501, and through the worm gear transmission between the worm 5 and the rotating shaft worm wheel 601, the synchronous rotating shaft 6 and the one-way rotating cylinder 602 are driven to rotate counterclockwise. Through the meshing of the teeth on the outer surface of the one-way rotating cylinder 602 and the locking teeth 701, the cylinder locking strap is tightened. The cylinder locking strap 7 is continuously and slowly pulled to the left, further tightening the cylinder locking strap 7 and increasing the locking strength of the cylinder, thus completing the fixed placement of the cylinder. If LNG fuel expansion is carried out, another placement rack is hoisted to the top of the bottom placement rack by the hoisting device and slowly lowered, so that the docking rod 201 and the limiting wedge 202 of the lower bracket are inserted into the docking slot 101 of the upper bracket. Under the action of the inclined surface of the limiting wedge 202 and the docking locking rod 104, the docking locking rod 104 is pushed into the push plate guide 103 and the locking rod top spring 106 is compressed. When the limiting wedge 202 is at the top of the docking locking rod 104, the docking locking rod 104 moves outward under the elastic force of the locking rod top spring 106 and inserts below the limiting wedge 202, limiting the limiting wedge 202. This achieves a stable docking of the upper and lower placement racks, enabling the rapid longitudinal splicing of the two sets of placement racks, allowing the two LNG cylinders to be placed longitudinally.

[0028] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0029] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0030] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A mounting bracket for LNG vehicle-mounted gas cylinders in heavy-duty vehicles, comprising: A support base (1) is fixedly connected to a support column (2) above the support base (1). Two adjacent support bases (1) are connected by welding an arc-shaped support plate (3). The characteristic feature is that two parallel gas cylinder support rollers (4) are fixedly connected between the front and rear arc-shaped support plates (3). The axis of the gas cylinder support rollers (4) is perpendicular to the arc-shaped support plate (3). An adjusting worm gear (5) is rotatably connected to the front surface of the left front support base (1) via a bearing. The axis of the adjusting worm gear (5) is perpendicular to the left surface of the support base (1). A synchronous rotating shaft (6) is rotatably connected between the two left support bases (1) via a bearing. The synchronous rotating shaft (6) is equipped with two one-way rotating cylinders (602) via a ratchet and pawl mechanism. The pawls in the ratchet and pawl mechanism of the one-way rotating cylinders (602) face counterclockwise in the forward view. The outer surface of the unidirectional rotating cylinder (602) is provided with toothed grooves. The front end of the synchronous rotating shaft (6) is fixedly connected to the rotating shaft worm gear (601). The rotating shaft worm gear (601) meshes with the adjusting worm (5). An upper support rod (205) is installed between the two support columns (2) on the left and the two support columns (2) on the right. The upper support rod (205) on the left is fixedly connected to the locking belt limit frame (206) by bolts. The lower surface of the locking belt limit frame (206) is provided with an arc-shaped limiting arc groove (207). The limiting arc groove (207) is coaxial with the synchronous rotating shaft (6). The upper support rod (205) on the right is fixedly installed with a gas cylinder locking belt (7) by bolts. The lower surface of the gas cylinder locking belt (7) is provided with locking belt locking teeth (701). The gas cylinder locking belt (7) fits against the groove surface of the limiting arc groove (207) and the outer surface of the unidirectional rotating cylinder (602).

2. The mounting bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles according to claim 1, characterized in that, The two support columns (2) on the left are connected by welding with a lower support frame (203) and a middle support frame (204), and the two support columns (2) on the right are connected by welding with a lower support frame (203) and a middle support frame (204).

3. The mounting bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles according to claim 1, characterized in that, An arc-shaped opening is provided above the arc-shaped support plate (3), and two support roller shaft grooves (301) are provided in the arc-shaped opening of the arc-shaped support plate (3).

4. The LNG vehicle-mounted gas cylinder placement bracket for heavy-duty vehicles and its usage method according to claim 3, characterized in that, A groove baffle (302) is movably inserted inside the support roller groove (301), and the groove baffle (302) is connected to the inner groove surface of the support roller groove (301) by screws.

5. A mounting bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles according to claim 4, characterized in that, The two ends of the cylinder support roller (4) are located inside the support roller shaft groove (301), and the lower surface of the shaft groove baffle (302) is in close contact with the outer surface of the cylinder support roller (4) shaft.

6. A mounting bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles according to claim 1, characterized in that, The top of the support column (2) is fixedly connected to a docking rod (201), and the top of the docking rod (201) is fixedly connected to a limiting wedge (202). The docking rod (201) is perpendicular to the upper end face of the support column (2).

7. A placement bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles and its method of use, as described in claim 6, is characterized in that... The bracket base (1) has docking ports (101) on both ends, and a locking rod groove (102) is provided inside the end of the bracket base (1). The locking rod groove (102) is perpendicular to the docking port (101).

8. A mounting bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles according to claim 7, characterized in that, The locking rod groove (102) is rotatably connected to a docking locking rod (104). The outer end of the docking locking rod (104) is machined with a wedge surface. The inner end of the docking locking rod (104) is fixedly connected to a locking rod guide plate (105). A locking rod top spring (106) is fixedly connected between the locking rod guide plate (105) and the inner end face of the locking rod groove (102).

9. A mounting bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles according to claim 8, characterized in that, The support base (1) has a push plate guide (103) extending through the front and rear ends. The push plate guide (103) is connected to the lock rod slide groove (102). The lock rod guide plate (105) is slidably connected to the push plate guide (103).

10. A method of using a placement bracket for LNG vehicle-mounted gas cylinders for heavy-duty vehicles according to any one of claims 1-9, characterized in that, Includes the following steps:

01. Place the LNG cylinder above the two cylinder support rollers (4) and support it with the two cylinder support rollers (4); 02. Insert the left end of the gas cylinder locking strap (7) from right to left between the one-way rotating cylinder (602) and the locking strap limiter (206), and pull it to the left so that the gas cylinder locking strap (7) fits tightly against the outer surface of the gas cylinder. Under the elastic force of the gas cylinder locking strap (7), it retracts to the right, so that the ratchet and pawl mechanism between the one-way rotating cylinder (602) and the bracket base (1) is locked by the reverse torque, and the gas cylinder locking strap (7) is further tightened.

03. By rotating the worm (5) through the worm handle (501), the worm gear (5) is adjusted. By adjusting the worm gear transmission between the worm (5) and the worm wheel (601), the synchronous rotating shaft (6) and the one-way rotating cylinder (602) are driven to rotate counterclockwise. Through the meshing action of the teeth on the outer surface of the one-way rotating cylinder (602) and the locking teeth (701), the gas cylinder locking belt (7) is continuously and slowly pulled to the left, so that the gas cylinder locking belt (7) is further tightened and the locking strength of the gas cylinder is increased. Thus, the placement process of the LNG vehicle gas cylinder is completed.

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