Expansion structure for guaranteeing engineering vehicle

Abstract

The invention discloses an expansion structure of a safeguard engineering vehicle, and belongs to the technical field of safeguard engineering vehicles. The structure comprises a fixed square cabin, expansion square cabins symmetrically arranged on the two sides of the fixed square cabin in a sliding mode, a bottom frame, an expansion driving mechanism and a guide assembly. The guide assembly comprises channel steel and a sliding block assembly. An air blowing cleaning assembly and a spraying supply assembly are integrated on the sliding block assembly; wherein the blowing cleaning assembly is provided with an inclined scraper embedded into channel steel, and a wave plate fixed on the channel steel is matched with a telescopic contact rod with a one-way triggering characteristic, so that a rotary valve core is driven to trigger intermittent pulse blowing when the shelter is reset; and the spraying supply assembly drives a negative pressure pump body to automatically spray the protection liquid to the surface of the channel steel through fluctuation linkage of a contact wheel and a waved plate. Through three-in-one cooperative operation of scraping, blowing and spraying, rail dirt is automatically removed and lubrication and rust prevention are carried out in the shelter withdrawing process, and the defects that a guide rail is prone to dust accumulation, rusting and clamping stagnation in the field severe environment are effectively overcome.

Description

Technical Field

[0001] This invention relates to the field of engineering vehicle technology, and in particular to an extension structure for engineering vehicles. Background Technology

[0002] Support vehicles play a crucial role in field operations, disaster relief, and military logistics support, primarily providing accommodation, office space, and living support for personnel. Due to strict road traffic regulations limiting vehicle dimensions, traditional fixed modular shelters have very limited internal space during transport, making it difficult to meet the needs of multiple users simultaneously or for comfortable long-term living. To resolve the conflict between transport convenience and usable space, side-expanding modular shelters have emerged. These shelters typically consist of a fixed cabin and movable extendable boxes nested on both sides of the fixed cabin. Upon arrival at the destination, a drive mechanism pushes the side boxes outwards, thus significantly expanding the interior usable area of ​​the shelter.

[0003] However, existing camping cabins, when implementing their expandable functions, often employ a linear guide structure at the bottom using a combination of channel steel and sliders. This means that channel steel is fixedly installed on the bottom of the expandable cabin as a guide rail, while the slider is mounted on the fixed cabin and slides within the channel steel. This structure has drawbacks in actual outdoor use. Because support vehicles are frequently exposed to windy, sandy, and muddy environments, and the channel steel guide rail at the bottom is structurally limited and cannot be fully enclosed, its interior easily becomes a blind spot for the accumulation of external sand, gravel, and mud. Over prolonged use, external sand and mud easily adhere to the inner cavity of the channel steel. With the accumulation of foreign matter, the expandable cabin becomes difficult to retract or unfold properly, affecting the reliability and service life of the support vehicle in complex outdoor environments.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides an extension structure for protecting engineering vehicles, thereby solving the technical problem that the existing bottom guide structure of camping cabins is prone to accumulating foreign objects in the field environment, leading to jamming of the extension mechanism and reduced reliability.

[0006] The present invention adopts the following technical solution: an extension structure for supporting engineering vehicles. It includes a fixed cabin and extension cabins symmetrically slidably arranged on both sides of the fixed cabin. A base frame is fixed to the bottom of the fixed cabin, and several fixed crossbeams are fixed on the base frame.

[0007] An expansion drive mechanism, mounted on the base frame, is used to drive the expansion module to unfold or retract relative to the fixed module; it also includes:

[0008] The guide assembly includes a plurality of channel steels spaced apart along the bottom surface of the expansion cabin, and a slider assembly fixed to the side of the fixed crossbeam and slidably fitted within the channel steels;

[0009] An air-blowing cleaning component, which is disposed on the outermost slider assembly, is configured to blow air to clean the sliding gap of the channel steel as the slider assembly moves relative to the channel steel.

[0010] A spray supply assembly, mounted on the slider assembly and located adjacent to the air-blowing cleaning assembly, is configured to spray a protective liquid onto the surface of the channel steel during movement.

[0011] Furthermore, the slider assembly consists of a roller support and a sliding wheel. The air blowing cleaning assembly and the spray supply assembly are both integrated and installed on the roller support. The air blowing cleaning assembly includes an inclined scraper fixed to the side of the roller support. The inclined scraper is embedded in the channel steel, and the surface of the inclined scraper is inclined to guide the dirt in the channel steel to fall off.

[0012] Furthermore, the air-blowing cleaning assembly includes an air path control assembly disposed within the roller support. The air path control assembly includes a fixed pipe that is vertically fixed within the roller support and parallel to the channel steel, and an air vent that is coaxially rotatably disposed inside the fixed pipe. One end of the air vent extends out of the fixed pipe and is fixed with a radially extending protrusion. One end of the fixed pipe is connected to an air vent, which is configured to connect to an external air supply device and introduce compressed air into the air chamber of the air vent.

[0013] Furthermore, the vent pipe has several waist-shaped vent grooves spaced apart along the axial direction on its wall, and the fixed pipe has several connecting pipes spaced apart along the axial direction on its wall. The connecting pipes correspond one-to-one with the waist-shaped vent grooves, and the inner diameter of the connecting pipe is smaller than the arc length of the waist-shaped vent groove, so as to keep the air passage open within a certain angle range when the vent pipe rotates.

[0014] Furthermore, the air-blowing cleaning assembly also includes a trigger reset mechanism, which comprises: a torsion spring, sleeved on the vent pipe, with its two ends connected to the convex edge and the end face of the fixed pipe, respectively, configured to apply torque to keep the vent pipe in a normally closed state, at which time the connecting pipe and the waist-shaped vent groove are misaligned and not connected; a corrugated plate, fixed in the length direction of the channel steel, with a number of corrugated blocks protruding at intervals along the straight direction on its surface; and a contact rod, fixedly installed on the surface of the convex edge and extending obliquely toward the corrugated plate, the contact rod being a telescopic sleeve structure, consisting of an inner rod and an outer rod that are interlocked and a built-in spring, configured to have a one-way trigger characteristic; when the slider assembly moves in the reset direction, the contact rod strikes the corrugated block and drives the vent pipe to rotate against the resistance of the torsion spring, causing the air passage to open intermittently; when the slider assembly moves in the unfolding direction, the contact rod is squeezed by the corrugated block and retracts to avoid it.

[0015] Furthermore, one end of the connecting pipe is connected to an air nozzle, which is configured to perform directional cleaning using high-pressure gas discharged from the connecting pipe. Several air nozzles located at the upper end are positioned towards the surface of the inclined scraper and are configured to blow away the dirt accumulated on the inclined scraper. Several air nozzles located at the lower end are positioned towards the inner bottom surface of the channel steel and are configured to blow away the deposits at the bottom of the channel steel outward. Several pipe clamps are fixed to the side of the inclined scraper and are configured to support and fix the connecting pipe to maintain the air blowing angle.

[0016] Furthermore, the spray supply assembly includes a negative pressure member fixed to the roller support by a clamp. A piston rod is movably disposed at one end of the negative pressure member. A contact wheel is fixed at one end of the piston rod extending out of the negative pressure member. The contact wheel is adapted to contact the wave block of the wave plate. A return spring is sleeved on the piston rod. The two ends of the return spring abut against the end face of the negative pressure member and the housing of the contact wheel, respectively. The return spring is configured to provide a reverse elastic force, so that the contact wheel always rolls in close contact with the surface of the wave plate, and drives the piston rod to return to its original position after the contact wheel passes the wave block.

[0017] Furthermore, one end of the piston rod extending into the negative pressure component is fixed with a piston end, which is in a sealing sliding fit with the inner wall of the negative pressure component. The negative pressure component is provided with an inlet port and an outlet port. A first one-way valve is provided at the inlet port, and a second one-way valve is provided at the outlet port. The outlet port is connected to a bifurcated nozzle, which is fixed to the side of the roller support by a fixing clamp, and the nozzle faces the inside of the channel steel.

[0018] The spray supply assembly is configured such that when the contact wheel is squeezed by the wave block, it pushes the piston end to compress the inner cavity of the negative pressure component, and the protective liquid is forced into the bifurcated nozzle through the second one-way valve and sprayed out. When the contact wheel is reset under the action of the reset spring, the piston end retracts to generate negative pressure, and external protective liquid is drawn in through the first one-way valve.

[0019] Furthermore, the expansion drive mechanism includes several mounting brackets symmetrically fixed on the base frame, and hydraulic cylinders fixed on the mounting brackets. The hydraulic cylinders are arranged in pairs facing each other, and their telescopic ends are respectively connected to the expansion cabins on both sides. They are configured to push the expansion cabins to expand and retract synchronously or independently in both directions through the telescopic action of the piston rod. The base frame is also equipped with a cable chain. One end of the cable chain is fixed to the base frame, and the other end is connected to the expansion cabin. It is configured to guide and protect the moving cables during the movement of the expansion cabin to prevent the cables from getting tangled or worn.

[0020] Furthermore, the top of the fixed cabin is provided with several ventilation windows, and its end face is provided with an air conditioning outdoor unit for regulating the air environment inside the cabin. The interior of the expandable cabin is provided with a folding bed, and a folding bed board is hinged to one side of the folding bed. The folding bed board is configured to rotate relative to the folding bed. When the folding bed is unfolded for use, the folding bed board is flipped down to a vertical state to overlap the fixed cabin and provide vertical support.

[0021] The technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0022] An extended structure for supporting engineering vehicles is disclosed in this invention. Addressing the operational needs of engineering vehicles in harsh outdoor environments such as sandstorms and muddy conditions, this invention integrates an air-blowing cleaning component onto the guide slider assembly. Through the tight fit between the inclined scraper and the inner cavity of the channel steel, large particles of mud, sand, and gravel accumulated in the track are automatically removed during the retraction of the shelter. Simultaneously, the high-pressure pulsed airflow generated by the air circuit control component powerfully blows away fine dust from the scraper surface and the channel steel groove. This combined scraping and blowing active cleaning method solves the problems of dust accumulation and difficulty in cleaning open channel steel guide rails, leading to movement jamming and wear.

[0023] This invention is equipped with a spray supply component that uses the mechanical energy of the cabin expansion movement as a power source. Through the mechanical linkage between the wave plate and the contact wheel, the negative pressure pump body is driven to automatically suck in and pump out the protective liquid. After being atomized by the branched spray pipes, the liquid is evenly covered on the cleaned channel steel sluice. This structure realizes that the lubricant is sprayed synchronously with the movement of the cabin, which effectively reduces the risk of rust on the surface of the channel steel.

[0024] The invention employs a telescopic sleeve contact rod in the triggering mechanism. When the cabin is retracted, the contact rod rigidly triggers the air circuit to open for cleaning. When the cabin is deployed, the contact rod automatically retracts to avoid triggering the air circuit, thus avoiding wasting air resources during the deployment phase when cleaning is not required. It also eliminates the risk of jamming during reverse movement, ensuring a smooth deployment process. Attached Figure Description

[0025] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0026] In the attached diagram:

[0027] Figure 1 This is an overall schematic diagram of an extension structure for a protective engineering vehicle according to this application;

[0028] Figure 2 for Figure 1 A partial structural diagram;

[0029] Figure 3 for Figure 2 A schematic diagram of the bottom structure;

[0030] Figure 4 for Figure 3 A partial structural diagram;

[0031] Figure 5 for Figure 4 Enlarged view of point A;

[0032] Figure 6 for Figure 4 Schematic diagram of the center guide component structure;

[0033] Figure 7 for Figure 6 Enlarged view of point B;

[0034] Figure 8 for Figure 6 A partial structural diagram;

[0035] Figure 9 for Figure 8 Enlarged view of point C;

[0036] Figure 10 for Figure 8 A partial structural diagram;

[0037] Figure 11 for Figure 10 Enlarged view of point D;

[0038] Figure label:

[0039] 1. Fixed cabin; 11. Expandable cabin; 12. Ventilation window; 13. Air conditioner outdoor unit; 14. Folding bed; 141. Folding bed board; 15. Base frame; 16. Fixed crossbeam; 2. Expanding drive mechanism; 21. Mounting angle frame; 22. Hydraulic cylinder; 23. Cable chain; 24. Channel steel; 25. Sliding block assembly; 251. Roller support; 3. Air blowing cleaning assembly; 31. Inclined scraper; 32. Fixed pipe; 33. Vent; 34. 341. Ventilation pipe; 342. Waist-shaped ventilation groove; 343. Contact rod; 35. Connecting pipe; 36. Air blowing nozzle; 37. Pipe clamp; 38. Torsion spring; 39. Corrugated plate; 391. Corrugated block; 4. Spray supply assembly; 41. Negative pressure component; 42. Clamp; 43. Piston rod; 44. Contact wheel; 45. Return spring; 46. Piston end; 47. Liquid inlet port; 48. Liquid outlet port; 49. Forked nozzle; 410. Fixing clamp. Detailed Implementation

[0040] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0041] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Reference Figures 1-6 As shown, this embodiment of the invention provides an extension structure for a support engineering vehicle. The main body includes a fixed cabin 1, with a base frame 15 welded to the bottom of the fixed cabin 1. Several fixed crossbeams 16 are fixed laterally at intervals on the base frame 15 to provide a high-strength support base for extension movement. Extension cabins 11 are symmetrically arranged on both sides of the fixed cabin 1. The extension cabins 11 are configured to extend outward to increase living space or retract inward to meet road transportation requirements.

[0043] To achieve this action, an extension drive mechanism 2 is provided on the base frame 15. Specifically, several mounting brackets 21 are symmetrically fixed on the base frame 15, and hydraulic cylinders 22 are fixed on the mounting brackets 21 and arranged opposite each other in pairs. The telescopic ends of the hydraulic cylinders 22 are respectively connected to the extension cabins 11 on both sides. During this deployment process, the hydraulic cylinders 22 extend synchronously or independently, and the thrust generated smoothly pushes the extension cabins 11 outward. Conversely, when the mission is over and needs to be withdrawn, the hydraulic cylinders 22 retract, pulling the extension cabins 11 back to the initial position.

[0044] In addition, a drag chain 23 is connected to the base frame 15. One end of the drag chain 23 is fixed, and the other end moves with the expansion cabin 11. During the reciprocating motion of the expansion cabin 11, the drag chain 23 guides and protects the internal moving cables in an orderly manner to prevent the cables from getting tangled, bent or worn during the extension and retraction process.

[0045] like Figures 6-8 As shown, to ensure smooth expansion operations, this embodiment includes a guide assembly. Several channel steels 24 are spaced along the bottom surface of the expansion cabin 11 as moving tracks. A slider assembly 25 is installed on the side of the fixed crossbeam 16, slidingly engaging within the inner cavity of the channel steels 24. Specifically, the slider assembly 25 consists of a roller support 251 and a sliding wheel. When the expansion cabin 11 moves, the channel steels 24 reciprocate linearly relative to the roller support 251 and the sliding wheel, thus achieving low-friction guiding support.

[0046] To address the challenges of harsh field working environments and dust accumulation on tracks, an air-blowing cleaning assembly 3 is installed on the roller support 251 of the outermost slider assembly 25. This air-blowing cleaning assembly 3 includes an inclined scraper 31 fixed to the side of the roller support 251. The end of the inclined scraper 31 is embedded in the inner cavity of the channel steel 24. During the retraction process, as the channel steel 24 moves inward, the inclined scraper 31 moves forward relative to it, scooping up large particles of mud, sand, and dirt accumulated inside the channel steel 24. The inclined angle guides the dirt to slide outward and be discharged, completing the first stage of physical coarse cleaning.

[0047] like Figures 6-8 As shown, to remove fine dust and prevent jamming, the air-blowing cleaning assembly 3 integrates an air path control component. A fixed pipe 32, perpendicular to the channel steel 24, is vertically fixed through the roller support 251. One end of the fixed pipe 32 is equipped with an air nozzle 33, which is connected to an external air source (such as a vehicle-mounted air tank) to continuously introduce compressed air. A ventilation pipe 34 is coaxially rotatably arranged inside the fixed pipe 32. One end of the ventilation pipe 34 extends outward and is fixed with a radial protrusion. Several waist-shaped ventilation grooves 341 are formed along the axial direction on the ventilation pipe 34. Correspondingly, several connecting pipes 35 are provided on the fixed pipe 32. The inner diameter of the connecting pipes 35 is smaller than the arc length coverage area of ​​the waist-shaped ventilation grooves 341.

[0048] To control the opening and closing of the air passage, a torsion spring 38 is fitted at one end of the vent pipe 34. The two ends of the torsion spring 38 are fixedly connected to the convex edge of the vent pipe 34 and the end face of the fixed pipe 32, respectively. Based on the above structure, in the initial state, the torsion spring 38 applies a pre-tight torque, forcing the vent pipe 34 to remain at the normally closed angle. At this time, the connecting pipe 35 is misaligned with the waist-shaped vent groove 341, and the air passage is cut off to prevent air waste. The end of the connecting pipe 35 is connected to a blowing nozzle 36, of which several nozzles at the upper end face the inclined scraper 31, and several nozzles at the lower end face the inner bottom surface of the channel steel 24. The pipe clamp 37 firmly locks the connecting pipe 35 to the side of the inclined scraper 31 to maintain the specified blowing angle.

[0049] Continue to refer to Figures 7-9As shown, in this embodiment, intermittent pulse blowing is achieved by triggering a reset mechanism, and a wave plate 39 is fixed in the length direction of the channel steel 24. Several raised wave blocks 391 are distributed on its surface. A contact rod 342 pointing to the wave plate 39 is installed on the raised edge of the air pipe 34. The contact rod 342 adopts a telescopic sleeve structure with an inner rod, an outer rod and a built-in spring.

[0050] When the extended cabin 11 is retracted (reset), the channel steel 24 drives the wave plate 39 to move, and the wave block 391 hits the contact rod 342. Since the contact rod 342 is at a rigid transmission angle at this time, it drives the vent pipe 34 to rotate over the resistance of the torsion spring 38. When the vent pipe 34 rotates to a specific angle, the inner waist-shaped vent groove 341 is aligned and connected with the outer connecting pipe 35, and the high-pressure gas is released to the blowing nozzle 36.

[0051] When the wave block 391 passes through the main contact area of ​​the contact rod 342, its driving force disappears, and the torsion spring 38 releases its rebound force to drive the vent pipe 34 to quickly rotate back to its original position, and the air passage is immediately cut off and closed. As the cabin continues to move, the next wave block 391 strikes the contact rod 342 again, and the above opening and closing process is repeated cyclically, thus forming a high-frequency, intermittent pulse-type pneumatic cleaning. Conversely, when the expandable cabin 11 is deployed outward, the wave block 391 pushes the contact rod 342 from the opposite direction. At this time, the contact rod 342 is pressed and triggers its internal telescopic mechanism. The inner rod is forced to retract into the outer rod to shorten its length for mechanical avoidance. This process does not generate an effective torque to drive the vent pipe 34 to rotate, so the air passage remains closed and the mechanism does not jam. Until all the wave blocks 391 have completely passed, the contact rod 342 returns to its initial length under the action of the internal spring, so that when the expandable cabin 11 retracts (resets) again, the intermittent jet is triggered again.

[0052] like Figures 10-11 As shown, in order to prevent the track from rusting, a spray supply assembly 4 is also installed on the roller support 251 via a clamp 42. The spray supply assembly 4 includes a negative pressure component 41 (pump body). The negative pressure component 41 has a piston rod 43 and a piston end 46 connected to one end of the piston rod 43 that extends into the negative pressure component 41. A contact wheel 44 is fixed to the extended end of the piston rod 43. A return spring 45 is sleeved on the outer periphery of the piston rod 43. Its two ends abut against the end face of the negative pressure component 41 and the housing of the contact wheel 44, respectively, thereby using the tension of the spring itself to provide a reverse thrust and keep the contact wheel 44 always rolling in close contact with the surface of the wave plate 39.

[0053] To achieve unidirectional flow and atomized spraying of the protective fluid, the negative pressure component 41 is also provided with an inlet port 47 and an outlet port 48. The inlet port 47 integrates a first one-way valve (suction valve), which is connected to an external storage tank (such as a vehicle-mounted storage tank) through a pipeline. The outlet port 48 integrates a second one-way valve (discharge valve), which is connected to a bifurcated nozzle 49. The bifurcated nozzle 49 is installed on the side of the roller support 251 by a fixing clip 410, and the nozzle at the end of the bifurcated nozzle 49 is set towards the internal friction surface of the channel steel 24.

[0054] When the contact wheel 44 rolls over the protrusion of the corrugated block 391, the contact wheel 44 is pressed inward, pushing the piston end 46 to compress the inner cavity of the negative pressure component 41. The pressure in the inner cavity increases, forcing the protective liquid to be atomized and sprayed onto the friction surface of the channel steel 24 through the branched nozzle 49 at the outlet port 48. When the contact wheel 44 rolls over the protrusion and enters the trough, the return spring 45 releases its elastic force, pushing the contact wheel 44 and piston rod 43 back. At this time, the piston end 46 retracts, and a negative pressure is generated in the inner cavity, drawing in the protective liquid from the external storage tank through the inlet port 47, preparing for the next spray. This ensures that the track receives uniform rust protection.

[0055] like Figure 1 and Figure 11 As shown, in addition to optimizing the external structure, this invention also improves the internal facilities. A ventilation window 12 is provided on the top of the fixed cabin 1, and an air conditioning unit 13 is mounted on its end. During operation, the air conditioning unit 13 activates to regulate the temperature and humidity inside the cabin, working in conjunction with the ventilation window 12 to achieve air convection and ensure comfortable living conditions. The extended cabin 11 contains a folding bed 14, with a folding bed board 141 hinged to one side. When needed, the operator unfolds the folding bed 14 and manually flips the folding bed board 141 downwards. The folding bed board 141 rotates around the hinge point to a vertical position, with its bottom end resting on the edge of the fixed cabin 1 or a dedicated support surface. At this time, the folding bed board 141 acts as a high-strength support leg, directly transferring the weight of the bed and personnel to the main structure of the fixed cabin 1, effectively solving the problem of insufficient load-bearing capacity in the suspended extended section and improving the safety and stability of camping.

[0056] Working Principle: When the support engineering vehicle arrives at the designated location for expansion operations, the control system issues a command, the expansion drive mechanism 2 starts, and the hydraulic cylinders 22 extend synchronously or independently. The resulting thrust pushes the expansion cabins 11 on both sides outward along the bottom channel steel 24 track. The cable chain 23 then guides and protects the cables. During this expansion process, although the wave blocks 391 on the wave plate 39 reverse the contact rod 342, the contact rod 342 triggers the internal telescopic mechanism to mechanically avoid it, preventing the air circuit from opening and avoiding airflow jetting. At the same time, the contact wheel 44 rolls passively with the undulation of the wave plate 39. After the expansion is in place, the operator enters the cabin, unfolds the folding bed 14, and flips the folding bed board 141 downward to a vertical position, so that its bottom end overlaps the fixed cabin 1, thereby forming a high-strength vertical support structure. With the air conditioner outdoor unit 13 turned on, the camping environment is completed.

[0057] When the mission is completed and the equipment needs to be withdrawn, the internal bed facilities are retracted, and the hydraulic cylinder 22 retracts to pull the extended cabin 11 back inward. At this time, the "scraping, blowing, and spraying" maintenance structure at the guide assembly operates synchronously. The inclined scraper 31 uses relative motion to scrape up large particles of dirt inside the channel steel 24 and guides them out. At the same time, the wave plate 39 moves forward, and the wave blocks 391 on it continuously hit the contact rod 342 at the rigid transmission angle, driving the vent pipe 34 to repeatedly rotate against the resistance of the torsion spring 38, so that the air passage is in an alternating open and closed state. The high-pressure gas forms a strong pulse airflow through the blowing nozzle 36, blowing away the residue on the scraper and the fine dust deep in the channel steel 24. Simultaneously, the contact wheel 44 is squeezed by the wave blocks 391 to push the piston rod 43 to reciprocate, driving the spray supply assembly 4 to continuously suck in and pump out protective liquid, which is atomized through the branched spray pipe 49 and evenly covers the surface of the channel steel 24 that has just been cleaned.

[0058] This invention utilizes a mechanical linkage design to transform the reciprocating motion of the expandable cabin 11 into a power source for track maintenance. During deployment, a one-way avoidance mechanism prevents accidental triggering of the air circuit; during retraction, the cooperation of the wave plate 39 with various contact points, through mechanical linkage, enables simultaneous scraping, blowing, and lubrication operations during the cabin's repositioning process. This design solves the problems of dust accumulation, rust, and jamming on the guide rails of engineering vehicles in windy and sandy environments, improving the reliability and service life of the entire vehicle under complex working conditions.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An extension structure for protecting engineering vehicles, comprising: A fixed container (1) and an extended container (11) symmetrically slidably arranged on both sides of the fixed container (1). The bottom of the fixed container (1) is fixed with a base frame (15), and several fixed crossbeams (16) are fixed on the base frame (15). An expansion driving mechanism (2) is arranged on the chassis (15) and used to drive the expansion shelter (11) to expand or contract relative to the fixed shelter (1); characterized in that, Also includes: The guide assembly includes a plurality of channel steels (24) spaced apart along the bottom surface of the expansion cabin (11), and a slider assembly (25) fixed to the side of the fixed beam (16) and slidably fitted within the channel steels (24). The air-blowing cleaning assembly (3), which is disposed on the outermost slider assembly (25), is configured to blow air to clean the sliding gap of the channel steel (24) as the slider assembly (25) moves relative to the channel steel (24); The spray supply assembly (4), which is mounted on the slider assembly (25) and located adjacent to the air blowing cleaning assembly (3), is configured to spray protective liquid onto the surface of the channel steel (24) during movement.

2. The spreader structure of claim 1, wherein: In the guide assembly, the slider assembly (25) consists of a roller support (251) and a sliding wheel. The air blowing cleaning assembly (3) and the spray supply assembly (4) are both integrated and installed on the roller support (251). The air blowing cleaning assembly (3) includes an inclined scraper (31) fixed on the side of the roller support (251). The inclined scraper (31) is embedded in the channel steel (24). The surface of the inclined scraper (31) is inclined to guide the dirt in the channel steel (24) to fall off.

3. The extension structure for a protective engineering vehicle according to claim 2, characterized in that: The air blowing cleaning assembly (3) includes an air path control assembly disposed in the roller support (251). The air path control assembly includes a fixed pipe (32) that is vertically fixed in the roller support (251) and perpendicular to the channel steel (24), and a vent pipe (34) that is coaxially rotatably disposed inside the fixed pipe (32). One end of the vent pipe (34) extends out of the fixed pipe (32) and is fixed with a radially extending protrusion. One end of the fixed pipe (32) is connected to a vent nozzle (33). The vent nozzle (33) is configured to connect to an external air supply device and introduce compressed air into the air chamber of the vent pipe (34).

4. The extension structure for a protective engineering vehicle according to claim 3, characterized in that: The vent pipe (34) has several waist-shaped vent grooves (341) spaced apart along the axial direction on the pipe wall. The fixed pipe (32) has several connecting pipes (35) spaced apart along the axial direction on the pipe wall. The positions of the connecting pipes (35) correspond one-to-one with the waist-shaped vent grooves (341), and the inner diameter of the connecting pipes (35) is smaller than the arc length coverage of the waist-shaped vent grooves (341) so as to keep the air passage open within a certain angle range of the vent pipe (34).

5. The extension structure for a protective engineering vehicle according to claim 4, characterized in that: The air-blowing cleaning assembly (3) also includes a trigger reset mechanism, which includes: a torsion spring (38), which is sleeved on the vent pipe (34), with its two ends connected to the flange and the end face of the fixed pipe (32) respectively, and is configured to apply torque to keep the vent pipe (34) in a normally closed state, at which time the connecting pipe (35) and the waist-shaped vent groove (341) are misaligned and not connected; a corrugated plate (39), which is fixed in the length direction of the channel steel (24), and its surface is provided with a number of corrugated blocks (391) at intervals along the straight direction; and a contact rod (342), which is fixed in the direction of the contact rod. Installed on the convex surface and extending obliquely toward the wave plate (39), the contact rod (342) is a telescopic sleeve structure, consisting of an inner rod and an outer rod that are interlocked and a built-in spring, and is configured to have a one-way triggering characteristic; when the slider assembly (25) moves in the reset direction, the contact rod (342) strikes the wave block (391) and drives the vent pipe (34) to rotate against the resistance of the torsion spring (38), so that the air passage is opened intermittently; when the slider assembly (25) moves in the unfolding direction, the contact rod (342) is squeezed by the wave block (391) and generates telescopic avoidance.

6. The extension structure for a protective engineering vehicle according to claim 5, characterized in that: One end of the connecting pipe (35) is connected to an air nozzle (36), which is configured to perform directional cleaning using high-pressure gas discharged from the connecting pipe (35). Several air nozzles (36) located at the upper end are arranged toward the surface of the inclined scraper (31) and are configured to blow away the dirt scraped off the inclined scraper (31). Several air nozzles (36) located at the lower end are arranged toward the inner bottom surface of the channel steel (24) and are configured to blow away the deposits at the bottom of the channel steel (24). Several pipe clamps (37) are fixed on the side of the inclined scraper (31) and are configured to support and fix the connecting pipe (35) to maintain the air blowing angle.

7. The extension structure for a protective engineering vehicle according to claim 5, characterized in that: The spray supply assembly (4) includes a negative pressure member (41) fixed to the roller support (251) by a clamp (42). A piston rod (43) is movably provided at one end of the negative pressure member (41). A contact wheel (44) is fixed at one end of the piston rod (43) extending out of the negative pressure member (41). The contact wheel (44) is adapted to contact the wave block (391) of the wave plate (39). A return spring (45) is sleeved on the piston rod (43). The two ends of the return spring (45) abut against the end face of the negative pressure member (41) and the housing of the contact wheel (44) respectively. The return spring (45) is configured to provide a reverse elastic force so that the contact wheel (44) always rolls in close contact with the surface of the wave plate (39) and drives the piston rod (43) to return to its original position after the contact wheel (44) passes the wave block (391).

8. The extension structure for a protective engineering vehicle according to claim 7, characterized in that: The piston rod (43) is fixed with a piston end (46) at one end that extends into the negative pressure component (41). The piston end (46) is in a sealing sliding fit with the inner wall of the negative pressure component (41). The negative pressure component (41) is provided with an inlet port (47) and an outlet port (48). A first one-way valve is provided at the inlet port (47), and a second one-way valve is provided at the outlet port (48). The outlet port (48) is connected to a bifurcated nozzle (49). The bifurcated nozzle (49) is fixed to the side of the roller support (251) by a fixing clamp (410), and the nozzle faces the inside of the channel steel (24). The spray supply assembly (4) is configured such that when the contact wheel (44) is squeezed by the wave block (391), it pushes the piston end (46) to compress the inner cavity of the negative pressure component (41), and the protective liquid is forced into the bifurcated nozzle (49) through the second one-way valve and sprayed out. When the contact wheel (44) is reset under the action of the return spring (45), the piston end (46) retracts to generate negative pressure, and external protective liquid is drawn in through the first one-way valve.

9. The extension structure for a protective engineering vehicle according to claim 1, characterized in that: The expansion drive mechanism (2) includes several mounting brackets (21) symmetrically fixed on the base frame (15), and hydraulic cylinders (22) fixed on the mounting brackets (21). The hydraulic cylinders (22) are arranged in pairs opposite each other, and their telescopic ends are respectively connected to the expansion cabins (11) on both sides. They are configured to push the expansion cabins (11) to expand and retract in both directions synchronously or independently through the telescopic action of the hydraulic cylinders (22). The base frame (15) is also provided with a drag chain (23). One end of the drag chain (23) is fixed to the base frame (15), and the other end is connected to the expansion cabin (11). It is configured to guide and protect the moving cables during the movement of the expansion cabin (11) to prevent the cables from getting tangled or worn.

10. The extension structure for a protective engineering vehicle according to claim 1, characterized in that: The top of the fixed cabin (1) is provided with several ventilation windows (12), and the end face of the window is provided with an air conditioning unit (13) for regulating the air environment inside the cabin. The interior of the expandable cabin (11) is provided with a folding bed (14). A folding bed board (141) is hinged to one side of the folding bed (14). The folding bed board (141) is configured to rotate relative to the folding bed (14). When the folding bed (14) is unfolded for use, the folding bed board (141) is flipped down to a vertical state to overlap the fixed cabin (1) to provide vertical support.

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