Large-diameter liquid rocket transportation device and transportation method thereof

Abstract

The invention relates to a large-diameter liquid rocket transportation device and a transportation method thereof, and belongs to the technical field of carrier rocket road transportation. Comprising a transportation frame, a steering assembly, a suspension assembly, a front transportation blanking cap and a rear transportation blanking cap. The transportation frame comprises a front frame body, a connecting frame and a rear frame body, and the connecting frame is higher than the front frame body and the rear frame body, so that the whole transportation frame is of an arch-shaped structure. The suspension assembly comprises a suspension swing arm, a damper, a suspension air bag and an air bag support, and height adjustment and damping buffering can be achieved. The two steering assemblies control independent steering of the conveying wheels on the front frame body and the rear frame body correspondingly, and the same-direction or reverse-direction steering strategy is achieved according to the size of a curve. The front transportation blanking cap integrates a lifting point connector and a transportation supporting shaft, and the rear transportation blanking cap is provided with an adjustable tail spraying cover to protect an engine spraying pipe. The technical problems of longitudinal slope trafficability, height limiting adaptability, turning flexibility and the like in large-diameter liquid rocket road transportation are solved.

Description

Technical Field

[0001] This invention relates to the field of road transportation technology for launch vehicles. In particular, it relates to a large-diameter liquid rocket transportation device and its transportation method. Background Technology

[0002] With the rapid development of commercial space satellite networks, the demand for the research and development of commercial liquid rockets, satellites, and ground terminal equipment is increasing, driven by satellite constellation construction and operation platforms. Against this backdrop, it is necessary to continuously optimize the liquid rocket industry layout, build commercial space industry bases, and promote the industrialization of core components such as commercial liquid rockets. To meet the transportation needs of large-diameter liquid rockets, such as transportation between bases, from manufacturing sites to launch sites, and from technical areas to launch areas, road transportation, with its flexibility and adaptability, is gradually becoming an important mode of rocket transport.

[0003] However, the road transportation of large-diameter rockets still faces several technical bottlenecks. Currently, rail transport is limited by clearance constraints, making it difficult to support the transfer of rockets with a diameter of 4 meters or more. While sea transport is more adaptable to different sizes, it is not universally applicable to inland launch sites and industrial bases lacking port facilities. Road transport, although highly flexible, is significantly constrained by factors such as highway toll stations, bridge and urban road height restrictions, and the ability to navigate steep inclines. Existing transportation solutions for 3.35-meter diameter rockets cannot meet the comprehensive requirements of 4-4.5-meter diameter rockets, including ultra-low chassis, reliable support, freedom of movement restrictions, lifting, vibration reduction and protection, and the ability to navigate steep inclines on long chassis.

[0004] Therefore, there is an urgent need for a transportation device and method that can adapt to the road transport of large-diameter rockets, taking into account both height-restricted passability and adaptability to complex road conditions, in order to support high-density, high-frequency launch missions of reusable rockets and the coordinated development of the industrial chain. Summary of the Invention

[0005] The purpose of this invention is to provide a large-diameter liquid rocket transport device and its transport method to solve one or all of the technical problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: A large-diameter liquid rocket transport device, comprising: A transport rack, on which several transport wheels are mounted; A steering assembly is provided and is connected to the transport wheel drive of the transport frame; Multiple suspension components are respectively installed at each of the transport wheels to adjust the height of the transport frame; A front transport cover, used for installation on the front end face of a rocket, includes a front inner frame, a front outer frame, a front connecting rib, a front connecting plate, and a front connecting shaft; the front inner frame and the front outer frame are arranged parallel to each other, the front connecting rib is fixedly arranged between the front inner frame and the front outer frame, two front connecting plates are provided and are arranged on opposite sides between the front inner frame and the front outer frame, two front connecting shafts are respectively fixedly arranged on the two front connecting plates and their axes are in the same straight line, and two front fixing seats are provided on opposite sides of the transport frame, and the two front connecting shafts are respectively embedded in the front fixing seats on the transport frame; The rear transport cap, used for installation on the engine end face of the rocket, includes a rear outer frame, a rear inner frame, a rear connecting rib, a tail nozzle cover, and a tail nozzle tie rod; the rear outer frame and the rear inner frame are arranged parallel to each other, the rear connecting rib is arranged between the rear outer frame and the rear inner frame, and several tail nozzle covers are provided and are arranged corresponding to the engine nozzles; the length of the tail nozzle tie rod is adjustable, and several tail nozzle tie rods are provided, one end of which is fixed to the rear inner frame and the other end is fixed to the tail nozzle cover.

[0007] According to one embodiment of the present invention, it includes a front frame, a connecting frame, and a rear frame that are interconnected, wherein the front frame and the rear frame are provided with a plurality of transport wheels.

[0008] According to one embodiment of the present invention, the connecting frame is set at a height higher than the front frame and the rear frame, so that the transport frame as a whole has an arched structure, and the connecting frame is set at a height 10cm to 40cm higher than the front frame and the rear frame.

[0009] According to one embodiment of the present invention, the front transport cover further includes a reinforcing rod, the two ends of which are respectively fixedly disposed on the front connecting plates on both sides, and the axis of the reinforcing rod is on the same straight line as the axis of the front connecting shafts on both sides.

[0010] According to one embodiment of the present invention, the suspension assembly includes a suspension swing arm, a damper, a suspension airbag, and an airbag bracket; one end of the suspension swing arm is hinged to a transport frame, the transport wheel is disposed on the suspension swing arm, the airbag bracket is fixedly installed on the transport frame and located above the suspension swing arm, the suspension airbag is installed between the airbag bracket and the suspension swing arm, and the two ends of the damper are respectively connected to the airbag bracket and the suspension swing arm.

[0011] According to one embodiment of the present invention, the steering assembly is provided in two sets, respectively disposed on the front frame and the rear frame; each set of steering assemblies includes a cylinder bracket, a steering cylinder, a steering lever, a steering longitudinal tie rod, and a steering transverse tie rod; the cylinder bracket is fixedly disposed on the transport frame, the steering lever is hinged to the transport frame, two steering cylinders are provided, one end of which is hinged to the cylinder bracket and the other end of which is hinged to the steering lever; two steering longitudinal tie rods are provided and slidably disposed parallel to each other on the transport frame, the two steering longitudinal tie rods are throttle connected to the steering lever, and several steering transverse tie rods are provided, one end of each of the several steering transverse tie rods is throttle connected to the steering longitudinal tie rod, and the other end is hinged to the transport wheel.

[0012] A method for transporting large-diameter liquid rockets includes the following steps: S1: Select a connecting frame of the corresponding length according to the length of the rocket, and assemble the front frame and the rear frame with the connecting frame to form a complete transport frame; S2: Install the front transport plug and the rear transport plug. Install the front transport plug on the end face of the rocket section and the rear transport plug on the end face of the rocket engine. S3: The rocket is hoisted and lowered onto the transport rack using the front and rear transport plugs; S4: Lock the front connecting shaft of the front transport plug to the front fixed seat set on the transport frame, fix the rear transport plug to the transport frame, and then install the soft packaging on the surface of the rocket body and secure it to the transport frame. S5: During transportation, the ground clearance of the transport frame is adjusted in real time according to road conditions by adjusting the airbag pressure of the suspension components, and the steering of the transport wheels is adjusted by controlling the steering components.

[0013] According to an embodiment of the present invention, step S1 specifically includes: S11: Hoist the rear frame to a level road surface; S12: Select a connecting frame of the appropriate length according to the length of the rocket, and ensure that 75% to 95% of the total length of the rocket is supported on the transport frame. Lift the connecting frame and connect it to the rear frame through the wedge-shaped guide structure. Insert the pin and lock it with screws. Then set the pad block at the bottom of the connecting frame to support it so that the connecting frame is parked horizontally and stably. S13: Lift the front frame and connect it horizontally to the assembled connecting frame and rear frame. Connect it through the wedge-shaped guide structure, insert the plug pin and lock it with screws. S14: Connect the tractor unit to the front frame, inflate the airbags of the suspension components to lift the transport frame, remove the support pads, and fix the transport bracket to the transport frame according to the rocket support position spacing.

[0014] 9. The method for transporting a large-diameter liquid rocket according to claim 7, characterized in that step S2 specifically includes: S21: Before installing the transport plug, align the front inner frame with the flange hole on the end face of the arrow body segment, and fix the front inner frame to the arrow body with bolts; S22: After installation, transport the plug, align the rear inner frame with the engine end face of the rocket body, fix the rear inner frame to the rocket body with bolts, connect several tail nozzle covers to the engine nozzles respectively, and adjust the length of the tail nozzle tie rod to fix the tail nozzle covers.

[0015] According to an embodiment of the present invention, step S5 specifically includes: When encountering steep slopes or potholes, inflate the suspension airbags to raise their height and lift the transport frame. When encountering a height-restricted section of road, deflate the suspension airbags to lower their height and lower the transport frame. When a turn is required, two sets of steering components are controlled according to the size of the curve: for large-diameter turns, the transport wheels on the front and rear frames are controlled to rotate in the same direction; for small-diameter turns, the transport wheels on the front frame are controlled to rotate in the direction of the turn, and the transport wheels on the rear frame rotate in the opposite direction.

[0016] Beneficial effects This invention has at least one of the following technical effects: 1. The transport frame adopts a structure in which the front frame, connecting frame, and rear frame are interconnected. The connecting frame is set higher than the front and rear frames, giving the entire transport frame a longitudinally arched shape that is high in the middle and low at both ends. This design aligns with the layout of the commercial liquid rocket industry and has multiple technical advantages: First, the arched connecting frame significantly increases the ground clearance in the middle of the transport frame. When the vehicle passes over the crest of a longitudinal slope, the middle connecting frame will not scrape against the ground, effectively solving the technical challenge of long-frame transport vehicles navigating longitudinal slopes in complex road conditions, ensuring efficient transfer of rockets between the industrial base and the launch site. Second, since the rocket support points are located on the front and rear frames, the arched structure of the connecting frame does not occupy additional height space required for rocket transport, making it more adaptable to highway height restrictions and urban road traffic conditions. Third, the arched structure allows for full utilization of the space on both sides of the connecting frame, increasing the rigidity of the entire vehicle frame by increasing the torsional cross-section, avoiding adverse effects on the rocket body caused by frame deformation during long-distance transport, and providing reliable equipment support for high-density commercial aerospace launch missions and the coordinated development of the industrial chain.

[0017] 2. The front transport cap adopts a frame structure, forming a lightweight and high-strength load-bearing frame through a front inner frame, a front outer frame, and front connecting ribs. Two front connecting plates are installed on opposite sides within the frame, each with a fixed front connecting shaft. This structure integrates the lifting interface and transport support shaft onto the same cap, allowing for direct lifting via the lifting points on the cap during rocket hoisting, eliminating the need for additional lifting points on the rocket body and reducing the structural load. The rear transport cap combines a frame with an adjustable tail nozzle shield. The tail nozzle shield is connected to the rear inner frame via an adjustable tail nozzle rod, allowing for flexible adjustment based on the number and layout of engine nozzles to meet the protection requirements of different rocket models. Furthermore, the extension and retraction of the tail nozzle rod provides a buffering effect, reducing the transmission of transport vibrations to the engine and protecting precision equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural diagram of a large-diameter liquid rocket transport device; Figure 2 A side view of a large-diameter liquid rocket transport device; Figure 3 This is a schematic diagram of the front transport plug section in a large-diameter liquid rocket transport device. Figure 4 This is a schematic diagram of the rear transport plug section in a large-diameter liquid rocket transport device. Figure 5 for Figure 1 Enlarged structural diagram at point A; Figure 6 This is a structural schematic diagram of the suspension assembly in a large-diameter liquid rocket transport device. Figure 7 This is a schematic diagram of the steering assembly in a large-diameter liquid rocket transport device. Figure 8 A schematic diagram of the state structure of the steering component of a large-diameter liquid rocket transport device when making a small-diameter turn; Figure 9 This is a schematic diagram illustrating the operation of a large-diameter liquid rocket transport device on a steep slope. Figure 10 Rear view of a large-diameter liquid rocket transporter; Figure 11 This is a flowchart illustrating the steps involved in a large-diameter liquid rocket transportation method.

[0020] Explanation of reference numerals in the attached figures: 1-Transport frame; 11-Front frame; 12-Connecting frame; 13-Rear frame; 14-Front fixed seat; 2-Transport wheel; 3-Steering assembly; 31-Cylinder bracket; 32-Steering cylinder; 33-Steering lever; 34-Steering longitudinal tie rod; 35-Steering transverse tie rod; 4-Suspension assembly; 41-Suspension swing arm; 42-Damper; 43-Suspension airbag; 44-Airbag bracket; 5-Front transport cover; 51-Front inner frame; 52-Front outer frame; 53-Front connecting rib; 54-Front connecting plate; 55-Front connecting shaft; 56-Reinforcing rod; 6-Rear transport cover; 61-Rear outer frame; 62-Rear inner frame; 63-Rear connecting rib; 64-Tail spray cover; 65-Tail spray tie rod. Detailed Implementation

[0021] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and to exemplify the principles of the present invention, and are not configured to limit the present invention. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the dimensions of some structural components or regions in the drawings may be enlarged for other structural components or regions to aid in the understanding of the embodiments of the present invention.

[0022] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise stated, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0023] Furthermore, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure or component that includes a list of elements includes not only those elements but also other structural elements that are not expressly listed or inherent to the structure or component. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes the element.

[0024] Spatial relation terms such as "below," "under," "under," "low," "above," "on," and "high" are used for descriptive convenience to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device, in addition to those different from those shown in the figure. Furthermore, phrases such as "one element on / below another element" can indicate that two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first" and "second" are also used to describe individual elements, areas, parts, etc., without specifically indicating order or sequence, and should not be considered restrictive. Similar terms are used throughout the description to represent similar elements.

[0025] It will be apparent to those skilled in the art that the present invention can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

[0026] In the following embodiments, there may be descriptions such as "this device". Those skilled in the art should understand that "this device" refers to a large-diameter liquid rocket transport device and its transport method provided by the present invention.

[0027] like Figure 1-7 As shown, Example 1: Overall structure of the transportation device The large-diameter liquid rocket transport device provided in this embodiment mainly includes a transport frame 1, a steering assembly 3, a suspension assembly 4, a front transport cover 5, and a rear transport cover 6. The transport frame 1 carries the rocket body and is equipped with multiple transport wheels 2. The transport frame 1 adopts a modular design and can be assembled and adjusted according to the rocket length. The steering assembly 3 is mounted on the transport frame 1 and is connected to each transport wheel 2 via a transmission system, used to control the steering angle and direction of the transport wheels 2. The suspension assembly 4 is correspondingly located at each transport wheel 2, serving both as a buffer and shock absorber and as an adjustment mechanism for the height of the transport frame 1 relative to the ground.

[0028] The transport frame 1 comprises three parts: a front frame 11, a connecting frame 12, and a rear frame 13. Transport wheels 2 are evenly distributed on the front frame 11 and the rear frame 13. The connecting frame 12 is located between the front frame 11 and the rear frame 13, connecting them and adjusting the overall length of the transport frame 1. The connecting frame 12 is designed to be higher than the front frame 11 and the rear frame 13, giving the entire transport frame 1 a longitudinally arched structure that is higher in the middle and lower at both ends. This design has the following advantages: First, it increases the ground clearance of the middle section of the transport frame 1, preventing the connecting frame 12 from scraping against the ground when the vehicle passes over the top of a longitudinal slope; second, the connecting frames are distributed on both sides of the rocket body, and the arched structure does not occupy the height space for rocket transport. Unlike the front frame 11 and the rear frame 13, which serve as support points for the rocket, the middle connecting frame 12 only acts as a connector, with no rocket body above it; third, the arched structure utilizes the space on both sides to increase the torsional cross-section of the connecting frame 12, improving the rigidity of the entire vehicle frame.

[0029] In this embodiment, the height of the connecting frame 12 is approximately 20 cm higher than the front frame 11 and the rear frame 13. This height value is determined comprehensively based on typical road longitudinal slope parameters and rocket transportation height requirements, ensuring both passability and structural stability of the connecting frame 12. In other embodiments, this height difference can be adjusted within the range of 10 cm to 40 cm to adapt to different transportation road conditions and rocket dimensions.

[0030] Example 2: Specific structure of the front transport plug 5 The front transport plug 5 is installed on the front end face of the rocket. Its main functions include: sealing the connection with the rocket end face, providing a hoisting interface, providing a transport support interface, and protecting the rocket body end face.

[0031] like Figure 3 As shown, the front transport cover 5 specifically includes a front inner frame 51, a front outer frame 52, a front connecting rib 53, a front connecting plate 54, and a front connecting shaft 55. Both the front inner frame 51 and the front outer frame 52 are annular frame structures, arranged parallel to each other, with diameters matching the rocket end flange. Multiple front connecting ribs 53 are radially or grid-likely distributed between the front inner frame 51 and the front outer frame 52, fixing them together to form an integral frame structure. This frame design ensures sufficient structural strength while reducing overall weight.

[0032] Two front connecting plates 54 are provided, positioned opposite each other between the front inner frame 51 and the front outer frame 52. Each front connecting plate 54 has a fixed front connecting shaft 55, with the axes of the two front connecting shafts 55 aligned on the same straight line. The front connecting shafts 55 cooperate with the front fixing seat 14 on the transport frame 1 to connect the front transport cover 5 to the transport frame 1. To reduce the height of the front fixing seat 14, the front connecting shafts 55 are positioned lower than the axes of the front inner frame 51 and the front outer frame 52. This allows the front fixing seat 14 to be positioned lower, which improves its support capacity and structural strength.

[0033] To further enhance structural strength, a reinforcing rod 56 is also provided on the front transport cover 5. The two ends of the reinforcing rod 56 are fixedly mounted on the two front connecting plates 54, and the axis of the reinforcing rod 56 is aligned with the axes of the two front connecting shafts 55. The presence of the reinforcing rod 56 ensures a rigid connection between the two front connecting plates 54, preventing the inner front frame 51 and outer front frame 52 from undergoing concave deformation during lifting or transportation, which could lead to the separation of the front connecting shaft 55 from the front fixed seat 14.

[0034] In the above embodiment, the reinforcing rod 56 and the front connecting shaft 55 are a complete shaft. During the processing, it is only necessary to process two corresponding front connecting shafts 55 at both ends of the reinforcing rod 56, which can further increase the structural strength of the front connecting shaft 55 and reduce the processing cost of the equipment.

[0035] In some embodiments, such as Figure 10 As shown, the upper surfaces of the front frame 11 and the rear frame 13 are provided with U-shaped grooves that fit with the rocket body, which can improve the fit between the rocket and the front frame 11 and the rear frame 13 and improve the stability of rocket transportation.

[0036] In use, first align the front inner frame 51 of the front transport plug 5 with the flange holes on the rocket segment end face, and then fix the front inner frame 51 to the rocket end face with bolts. Due to the large number of flange holes, to ensure the reliability of the docking installation, two sets of detachable guide pins can be installed on the front inner frame 51. Before hoisting, after transporting the plug 5 to a certain distance from the end face, use the guide pins to guide the plug to align with the end face and then slowly push it in. First, fix the four positive quadrant screws, then fix the end face bolts diagonally in sequence, and finally unscrew the guide pins.

[0037] Example 3: Specific structure of the rear transport plug 6 like Figure 4 As shown, the rear transport plug 6 is used to install on the engine end face of the rocket. Its structure is more complex than that of the front transport plug 5, and it needs to consider functions such as connecting with the rocket body, protecting the engine nozzle, and providing a hoisting interface.

[0038] The rear transport cover 6 includes a rear outer frame 61, a rear inner frame 62, a rear connecting rib 63, a tail nozzle cover 64, and a tail nozzle tie rod 65. Both the rear outer frame 61 and the rear inner frame 62 are annular frame structures, arranged parallel to each other. The rear connecting rib 63 is located between the rear outer frame 61 and the rear inner frame 62 to securely connect them. The rear inner frame 62 is used to connect to the rocket's arrow legs. Since the tail of the rocket body typically lacks a flange interface, through holes are provided at the evenly distributed arrow leg roots at the tail, and bolts are used to securely connect the rear inner frame 62 to the arrow legs. For arrow legs or recovery outriggers in the overall transport height direction, they should be removed in advance because the diameter of the envelope circle containing the arrow legs is usually larger than the diameter of the rocket's base circle. Correspondingly, the rear outer frame 61 is also designed as a straight, non-circular frame at the corresponding position to avoid increasing the transport height.

[0039] The number of tail nozzle shields 64 corresponds to the number of engine nozzles. For large-diameter launch vehicles, the number of engines can typically reach 7 or 9. The shape of each tail nozzle shield 64 matches the outer contour of the corresponding engine nozzle, forming a circular boss structure that can be embedded in the engine nozzle to form a fixed protective structure. The number of tail nozzle struts 65 corresponds to the number of tail nozzle shields 64. One end of each tail nozzle strut 65 is fixed to the rear inner frame 62, and the other end is fixed to the corresponding tail nozzle shield 64, used to support and position the tail nozzle shield 64.

[0040] In this embodiment, the tail nozzle linkage 65 adopts an adjustable structure, including a fisheye bearing, a locking nut, and an internally threaded connecting rod. The overall length of the tail nozzle linkage 65 can be adjusted by rotating the internally threaded connecting rod, and then locked by the locking nut after adjustment to the appropriate length. This adjustable design can adapt to the layout and size differences of different engines, and at the same time, it can play a certain role in buffering during transportation, reducing vibration transmission.

[0041] The rear transport plug 6 has lifting point interfaces on both sides of its frame, which can be used for lifting the rear transport plug 6 itself or for lifting the entire rocket. During installation, after the frame of the rear transport plug 6 is first fixed to the rocket's arrowheads, its outer frame structure can form a working ladder for installing the circumferential and central tail nozzle covers 64. Installation can begin with the central tail nozzle cover 64, followed by symmetrical installation of the two side tail nozzle covers 64. The length is adjusted using adjustable tail nozzle tie rods 65 to ensure the tail nozzle covers 64 fit snugly against the engine nozzles. Finally, all tail nozzle covers 64 are installed and fixed in place.

[0042] Example 4: Specific structure and working principle of suspension assembly 4 like Figure 6As shown, the suspension assembly 4 includes a suspension swing arm 41, a damper 42, a suspension airbag 43, and an airbag bracket 44. One end of the suspension swing arm 41 is hinged to the transport frame 1 via a swing arm rotation axis, allowing it to swing up and down around the rotation axis. The transport wheel 2 is installed at the middle position of the suspension swing arm 41, enabling the road impact load to be transmitted through the swing arm.

[0043] The airbag bracket 44 is fixedly mounted on the transport frame 1, located above the suspension arm 41. The suspension airbag 43 is installed in the gap formed between the airbag bracket 44 and the suspension arm 41. When the vehicle is moving, road bumps cause the suspension arm 41 to swing around its rotation axis, transmitting the impact load to the suspension airbag 43, which is then buffered by the compression and deformation of the airbag. The damper 42 is connected between the airbag bracket 44 and the suspension arm 41, and works in conjunction with the suspension airbag 43 to absorb vibration energy and achieve a vibration reduction effect.

[0044] One important function of the suspension airbag 43 is that it can adjust the height by inflating and deflating. When the suspension airbag 43 needs to be inflated, the height of the airbag increases, pushing the suspension arm 41 to swing downward, thereby raising the position of the transport frame 1 relative to the wheels; when the suspension airbag 43 is deflated, the thickness of the suspension airbag 43 decreases, the suspension arm 41 flips upward, and the suspension arm 41 and the airbag bracket 44 move closer to each other, at which time the transport frame 1 moves towards the ground. When the suspension airbag 43 is inflated, the thickness of the suspension airbag 43 increases, the suspension swing arm 41 flips downward, and the suspension swing arm 41 and the airbag bracket 44 move away from each other. At this time, the transport frame 1 moves away from the ground. This height adjustment function plays an important role in the transportation process: when encountering road sections with severe height restrictions, the overall transportation height can be reduced by deflating the suspension airbag 43 to meet the height restriction requirements; when encountering steep slopes or potholes, the suspension airbag 43 can be inflated to increase the distance between the transport frame 1 and the ground, preventing the transport frame 1 from scraping against the ground and improving passability.

[0045] In this embodiment, the suspension airbags 43 of all transport wheels 2 are uniformly controlled, enabling synchronized adjustment of the overall vehicle height. In other embodiments, a group control method can also be used to achieve height difference adjustment between the front and rear sections to adapt to special road conditions.

[0046] Example 5: Specific structure and working principle of steering component 3 like Figure 7 As shown, the steering assembly 3 includes a cylinder bracket 31, a steering cylinder 32, a steering lever 33, a steering longitudinal tie rod 34, and a steering transverse tie rod 35. Two sets of the steering assembly 3 are provided, respectively mounted on the front frame 11 and the rear frame 13, for independently controlling the steering of the two sets of transport wheels 2.

[0047] The cylinder bracket 31 is fixedly mounted on the transport frame 1, providing a mounting base for the steering cylinder 32. The steering lever 33 is hinged to the transport frame 1 and can rotate around the hinge point. One end of each of the two steering cylinders 32 is hinged to the cylinder bracket 31, and the other end is hinged to both sides of the steering lever 33. By controlling the extension and retraction of the two steering cylinders 32, the steering lever 33 can be rotated in different directions.

[0048] Two longitudinal steering tie rods 34 are slidably mounted parallel to each other on the transport frame 1, with one end hinged to a steering lever 33. When the steering lever 33 rotates, it causes the two longitudinal steering tie rods 34 to move linearly in opposite directions. Each transport wheel 2 is equipped with a corresponding lateral steering tie rod 35, one end of which is connected to the longitudinal steering tie rod 34, and the other end is hinged to the transport wheel 2. When the longitudinal steering tie rod 34 moves, it causes all the lateral steering tie rods 35 connected to it to move. The movement of the lateral steering tie rods 35 pulls the transport wheel 2 to rotate around its steering axis, thus achieving steering.

[0049] This steering mechanism has the following characteristics: First, it adopts independent control, which can control the steering of the transport wheels 2 on the front frame 11 and the rear frame 13 separately as needed; second, it has high steering accuracy and can achieve precise steering angle control; third, it has a compact structure and is easy to arrange in a limited space.

[0050] During transportation, different steering strategies are employed depending on the type of curve. When navigating large-diameter curves, the two sets of steering components 3 are controlled to rotate the transport wheels 2 on the front frame 11 and rear frame 13 in the same direction, allowing the vehicle to smoothly pass through the curve with a larger turning radius. When navigating small-diameter curves or ramps, the steering component 3 on the front frame 11 is controlled to rotate the corresponding transport wheel 2 in the steering direction, while the steering component 3 on the rear frame 13 is controlled to rotate the corresponding transport wheel 2 in the opposite direction. This steering method significantly reduces the vehicle's turning radius and improves its ability to maneuver in confined spaces.

[0051] Example 6: Detailed steps of the transportation method This embodiment provides a method for transporting a large-diameter liquid rocket using the above-described transport device, including the following steps: S1: Select a connecting frame 12 of the corresponding length according to the length of the rocket, and assemble the front frame 11 and the rear frame 13 with the connecting frame 12 to form a complete transport frame 1.

[0052] Step S1 specifically includes: S11: Hoist the rear frame 13 to a flat road surface and place temporary pads at the bottom to ensure stability.

[0053] S12: Select a connecting frame 12 of the appropriate length according to the rocket length, ensuring that 75% to 95% of the total rocket length can be supported on the transport frame 1. Lift the connecting frame 12 so that one end of its interface aligns with the interface of the rear frame 13. The interface between the connecting frame 12 and the rear frame 13 adopts a wedge-shaped guide structure, which has a guiding and positioning function. After inserting the connecting frame 12 into place, pass the insertion pin through the connection hole between the two, and then tighten the pin connection screw to lock it in place.

[0054] S13: Lift the front frame 11 and connect it horizontally to the assembled connecting frame 12. Use a wedge-shaped guide structure for guidance and positioning, and lock it with pins and screws after insertion. At this point, the front frame 11, connecting frame 12 and rear frame 13 are connected to form a complete transport frame 1.

[0055] S14: Connect the tractor unit to the front frame 11, inflate the airbags of the suspension assembly 4, lift the transport frame 1, and remove the temporary pads at the bottom. Then, fix the transport bracket to the designated position on the transport frame 1 according to the spacing requirements of the rocket support position.

[0056] In the above steps, the suspension assembly 4 is pre-assembled onto the front frame 11 and the rear frame 13, thereby reducing the number of steps required for rocket assembly.

[0057] S2: Install the pre-transport plug 5 and the post-transport plug 6.

[0058] Step S2 specifically includes: S21: Install the front transport cap 5. Hoist the front transport cap 5 to near the front end face of the rocket. Using the detachable guide pin on the front inner frame 51 to align with the flange hole on the rocket end face, slowly push it in until the front inner frame 51 fits against the rocket end face. First, fix the four positive quadrant screws, then fix all the end face bolts diagonally in sequence to ensure a reliable connection. Finally, unscrew the guide pin.

[0059] S22: Install the rear transport cap 6. First, hoist the frame structure of the rear transport cap 6 to the vicinity of the rocket engine end face. Align the rear inner frame 62 with the connecting holes of the arrow foot, and fix the rear inner frame 62 to the arrow foot with bolts. After the frame is installed and fixed, use the trapezoidal structure of the frame as a working ladder to begin installing the tail nozzle cover 64.

[0060] Further in step S22, when the rear transport plug 6 in this solution is used to seal the nine engines, the nozzles of the nine engines are arranged as follows: one engine nozzle is placed in the center, and eight other engines are arranged at equal intervals around the central engine nozzle. In this embodiment, nine tail nozzle covers 64 are provided to cover the nozzles of the nine engines respectively; S221: First, install any two tail nozzle covers 64 located diagonally, and connect each tail nozzle cover 64 to the rear inner frame 62 through two tail nozzle tie rods 65 to complete the connection. The length of the tail nozzle tie rod 65 is adjusted so that the tail nozzle cover 64 fits against the engine nozzle. Then, the tail nozzle cover 64 in the middle is installed so that it fits against the engine nozzle in the middle. After fitting, the tail nozzle tie rod 65 is used to connect it to the outer ring tail nozzle covers 64 that have been assembled on both sides. At this time, the three tail nozzle covers 64 form a relatively stable structure. Then, the installation of the six outer ring tail nozzle covers 64 is started step by step. Each outer ring tail nozzle cover 64 is connected to the central tail nozzle cover 64 through a tail nozzle tie rod 65.

[0061] S3: The rocket is hoisted as a whole through the lifting point interfaces on the front transport cover 5 and the rear transport cover 6, and then smoothly lowered onto the transport frame 1. During hoisting, a bracket support lug is pre-installed on the front connecting shaft 55 of the front transport cover 5 for guiding and positioning the rocket as it falls into the transport frame. When hoisting the rocket, it is slowly lowered so that the front connecting shaft 55 of the front transport cover 5 accurately falls into the front fixed seat 14 of the transport frame.

[0062] S4: Lock the front connecting shaft 55 of the front transport cover 5 to the front fixing seat 14 of the transport bracket. Specifically, a wedge-shaped hole is provided at the mating point between the front fixing seat 14 and the front connecting shaft 55, and a wedge-shaped pin is passed through the wedge hole to lock the two together. For the rear end of the rocket, the lifting point interface on the rear transport cover 6 is used to pull and fix it to the transport frame 1 in a figure-eight pattern to limit the lateral and longitudinal displacement of the rear end of the rocket. After the rocket is fixed, a soft package is installed on the surface of the rocket body. The soft package adopts a three-layer structure: the innermost layer is a rainproof layer, the middle layer is a cushioning layer, and the outermost layer is a thickened tarpaulin layer. The soft package is fixed to the fastening points on the transport frame 1 to ensure reliable packaging.

[0063] S5: Start transportation and adjust in real time according to road conditions during transportation.

[0064] The S5 steps specifically include: When encountering steep slopes or potholes, the suspension airbag 43 is inflated to raise its height and lift the transport frame 1, thereby increasing the ground clearance between the transport frame 1 and the ground, preventing the transport frame 1 from scraping against the ground, and improving passability.

[0065] When encountering a height-restricted section of road, the airbag 43 is deflated to lower its height, causing the transport frame 1 to descend, thereby reducing the overall transport height and meeting the height restriction requirements.

[0066] When a turn is required, the two sets of steering components 3 are controlled according to the size of the curve: for large-diameter curves, the transport wheels 2 on the front frame 11 and the rear frame 13 are controlled to rotate in the same direction, so that the whole vehicle can pass smoothly with a larger turning radius; for small-diameter curves or ramps, the transport wheels 2 on the front frame 11 are controlled to rotate in the direction of turning, while the transport wheels 2 on the rear frame 13 are controlled to rotate in the opposite direction, so as to reduce the turning radius and improve the passability.

[0067] Example 7: Other modified examples In some embodiments, the concave structure of the transport frame 1 may adopt a circular cross-section design to improve structural strength and aesthetics.

[0068] In some embodiments, the upper arch structure of the connecting frame 12 may be an arc-shaped upper arch to simplify the manufacturing process.

[0069] In some embodiments, the frame connection may employ other forms of locking pin structures, such as spring locking pins, threaded locking pins, etc.

[0070] In some embodiments, the connection between the transport bracket and the transport cover can be achieved using other fixing methods besides wedge pin fixing, such as direct bolt fixing, snap-fit ​​fixing, etc.

[0071] In some embodiments, the front transport plug 5 and the rear transport plug 6 may be in the form of a sealed structure to provide better waterproof and dustproof protection.

[0072] In some embodiments, the engine transport cover can be designed as a seven-engine structure or other quantity structures, depending on the actual number of engines, to accommodate different types of rockets.

[0073] It should be understood that the above-described embodiments or examples of the present invention can be combined with each other and have corresponding technical effects.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large-diameter liquid rocket transport device, characterized in that, include: A transport frame (1) is provided with several transport wheels (2); Steering assembly (3) is provided in the transport frame (1) and the transport wheel (2) for transmission connection; Multiple suspension components (4) are respectively installed at each of the transport wheels (2) for adjusting the height of the transport frame; The front transport cover (5) is used to install on the front end face of the rocket, including the front inner frame (51), the front outer frame (52), the front connecting rib (53), the front connecting plate (54) and the front connecting shaft (55); the front inner frame (51) and the front outer frame (52) are arranged parallel to each other, the front connecting rib (53) is fixedly arranged between the front inner frame (51) and the front outer frame (52), two front connecting plates (54) are provided and are arranged on opposite sides between the front inner frame (51) and the front outer frame (52), and two front connecting shafts (55) are respectively fixedly arranged on the two front connecting plates (54) and their axes are in the same straight line. Two front fixing seats (14) are arranged on opposite sides on the transport frame (1), and the two front connecting shafts (55) are respectively embedded in the front fixing seats (14) on the transport frame (1). The rear transport cap (6) is used to install on the engine end face of the rocket, including a rear outer frame (61), a rear inner frame (62), a rear connecting rib (63), a tail nozzle cover (64), and a tail nozzle tie rod (65); the rear outer frame (61) and the rear inner frame (62) are arranged parallel to each other, the rear connecting rib (63) is arranged between the rear outer frame (61) and the rear inner frame (62), and several tail nozzle covers (64) are provided and are arranged corresponding to the engine nozzles; the length of the tail nozzle tie rod (65) is adjustable, and several tail nozzle tie rods (65) are provided, one end of which is fixed to the rear inner frame (62), and the other end is fixed to the tail nozzle cover (64).

2. The large-diameter liquid rocket transport device according to claim 1, characterized in that, It includes a front frame (11), a connecting frame (12), and a rear frame (13) that are connected to each other, and the front frame (11) and the rear frame (13) are equipped with multiple transport wheels (2).

3. The large-diameter liquid rocket transport device according to claim 2, characterized in that, The connecting frame (12) is set at a height higher than the front frame (11) and the rear frame (13), so that the transport frame (1) is an arched structure as a whole. The connecting frame (12) is set at a height 10cm to 40cm higher than the front frame (11) and the rear frame (13).

4. The large-diameter liquid rocket transport device according to claim 1, characterized in that, The front transport cover (5) also includes a reinforcing rod (56), the two ends of which are fixedly mounted on the front connecting plates (54) on both sides, and the axis of the reinforcing rod (56) is on the same straight line as the axis of the front connecting shafts (55) on both sides.

5. The large-diameter liquid rocket transport device according to claim 1, characterized in that, The suspension assembly (4) includes a suspension swing arm (41), a damper (42), a suspension airbag (43), and an airbag bracket (44); one end of the suspension swing arm (41) is hinged to the transport frame (1), the transport wheel (2) is disposed on the suspension swing arm (41), the airbag bracket (44) is fixedly installed on the transport frame (1) and located above the suspension swing arm (41), the suspension airbag (43) is installed between the airbag bracket (44) and the suspension swing arm (41), and the two ends of the damper (42) are respectively connected to the airbag bracket (44) and the suspension swing arm (41).

6. The large-diameter liquid rocket transport device according to claim 1, characterized in that, The steering assembly (3) is provided in two sets, respectively located on the front frame (11) and the rear frame (13); each set of steering assembly (3) includes a cylinder bracket (31), a steering cylinder (32), a steering lever (33), a steering longitudinal tie rod (34), and a steering transverse tie rod (35); the cylinder bracket (31) is fixedly installed on the transport frame (1), the steering lever (33) is hinged to the transport frame (1), two steering cylinders (32) are provided, one end of which is hinged to the cylinder bracket (31), and the other end of which is hinged to the steering lever (33); two steering longitudinal tie rods (34) are provided and are slidably installed on the transport frame (1) in parallel with each other, the two steering longitudinal tie rods (34) are connected to the steering lever (33) in a transmission connection, and several steering transverse tie rods (35) are provided, one end of each of the several steering transverse tie rods (35) is connected to the steering longitudinal tie rod (34) in a transmission connection, and the other end is hinged to the transport wheel (2).

7. A method for transporting a large-diameter liquid rocket using the transport device as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Select a connecting frame (12) of the corresponding length according to the length of the rocket, and assemble the front frame (11) and the rear frame (13) with the connecting frame (12) respectively to form a complete transport frame (1). S2: Install the front transport plug (5) and the rear transport plug (6), install the front transport plug (5) on the segment end face of the rocket, and install the rear transport plug (6) on the engine end face of the rocket; S3: The rocket is hoisted through the front transport plug (5) and the rear transport plug (6) and lowered onto the transport rack (1); S4: Lock the front connecting shaft (55) of the front transport plug (5) to the front fixed seat (14) set on the transport frame (1), fix the rear transport plug (6) to the transport frame (1), and then install soft packaging on the surface of the rocket body and fasten it to the transport frame (1); S5: During transportation, the ground clearance of the transport frame (1) is adjusted in real time by adjusting the airbag pressure of the suspension assembly (4) according to the road conditions, and the steering of the transport wheel (2) is adjusted by controlling the steering assembly (3).

8. The method for transporting large-diameter liquid rockets according to claim 7, characterized in that, Step S1 specifically includes: S11: Hoist the rear frame (13) to a flat road surface; S12: Select the corresponding length of the connecting frame (12) according to the length of the rocket, lift the connecting frame (12) and connect it with the rear frame (13) through the wedge guide structure, insert the plug pin and lock it with screws, and set the pad block support at the bottom of the connecting frame (12) so that the connecting frame (12) is horizontally and stably parked. S13: Lift the front frame (11) and connect it horizontally to the assembled connecting frame (12) and rear frame (13). Connect it through the wedge-shaped guide structure, insert the plug pin and lock it with screws. S14: Connect the tractor head to the front frame (11), inflate the airbags of the suspension assembly (4) to lift the transport frame (1), remove the support pads, and fix the transport bracket to the transport frame (1) according to the rocket support position spacing.

9. The method for transporting large-diameter liquid rockets according to claim 7, characterized in that, Step S2 specifically includes: S21: Before installation, transport the cover (5), align the front inner frame (51) with the flange hole on the end face of the arrow body segment, and fix the front inner frame (51) to the arrow body with bolts; S22: After installation, transport the plug (6), connect the rear inner frame (62) to the engine end face of the rocket body, fix the rear inner frame (62) to the rocket body with bolts, connect several tail nozzles (64) to the engine nozzles respectively, and adjust the length of the tail nozzle rod (65) to fix the tail nozzles (64).

10. The method for transporting large-diameter liquid rockets according to claim 7, characterized in that, Step S5 specifically includes: When encountering steep slopes or potholes, the suspension airbag (43) is inflated to raise its height and lift the transport frame (1); When encountering a height-restricted section of road, the airbag (43) is deflated to lower its height and the transport frame (1) is lowered. When a turn is required, the two sets of steering components (3) are controlled according to the size of the curve: when the curve is large, the transport wheels (2) on the front frame (11) and the rear frame (13) are controlled to rotate in the same direction; when the curve is small, the transport wheels (2) on the front frame (11) are controlled to rotate in the direction of the turn and the transport wheels (2) on the rear frame (13) are controlled to rotate in the opposite direction.

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