Manual expansion mechanism for square cabin support

Abstract

The invention discloses a manual expansion mechanism for shelter support, which comprises a fixed support assembly connected with the top and bottom walls of a shelter, a rotary support arm, a leveling support leg and a bearing assembly, the fixed support assembly is provided with a bearing step, and the rotary support arm abuts against a bearing during rotation and abuts against the step during support. The fixed supporting assemblies are fixedly connected with the top wall and the bottom wall of the square cabin correspondingly, the rigid force bearing stand columns penetrating through the upper portion and the lower portion are constructed at the corners of the square cabin, and a force transmission path for directly transmitting supporting loads to a square cabin framework is formed; the problems that due to the fact that the top framework of the square cabin is cut off by the embedded sliding cover, the cabin body is distorted and deformed, and the cabin door frame is dislocated and cannot be closed are effectively solved, and the structural stability and sealing safety of the square cabin under the heavy load working condition are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of modular shelter structure and auxiliary equipment technology, and in particular to a manual extension mechanism for modular shelter support. Background Technology

[0002] As an important mobile platform, modular shelters are widely used in military, communications, and emergency rescue fields. To ensure the levelness and stability of the modular shelter when parked in the field, it is usually necessary to equip it with a leveling outrigger mechanism.

[0003] In existing modular shelter leveling technologies, outriggers are typically mounted directly on the outside of the shelter or embedded in its sidewalls. For example, Chinese utility model patent CN 212295779 U discloses a self-loading and unloading wide-body modular shelter structure, which uses outward-facing grooves on both sides of the shelter, with outer sleeves embedded within these grooves, into which the outriggers are inserted for driving lifting. This existing technology is relatively mature in conventional modular shelters, and its core logic relies on the continuity and overall strength of the shelter's sidewall frame to bear the load transmitted by the outriggers.

[0004] However, for specific large-tonnage (such as 15t class) container cabins with special structural requirements, the above-mentioned existing technical solutions can no longer meet the usage requirements, mainly due to the following technical problems: In certain projects, embedded sliding covers need to be installed on the top of the modular shelter, which results in the truncation of the transverse frame of the shelter's top, severely weakening its overall strength and rigidity. If the leveling mechanism is directly installed on the bulkhead using existing technology, the enormous torque and shear force will act directly on the weakened bulkhead when the leveling outriggers cantilever to rotate outside the shelter or during jacking operations, easily causing the shelter to twist and deform. The most direct consequence of this deformation is misalignment of the hatch frame, preventing the hatch from closing properly and severely affecting the shelter's airtightness and operational safety.

[0005] Existing rotary leveling mechanisms often fail to adequately consider the protection of moving parts under heavy load conditions during their design. When supporting a 15t heavy container, if the swivel bearings (such as thrust bearings) of the outriggers are continuously subjected to enormous axial pressure during the lifting and support phase, it is highly likely that the bearing rollers will crush or the raceways will be damaged, resulting in mechanism jamming, impaired rotation, or even complete failure, thus reducing the service life of the equipment.

[0006] Therefore, there is an urgent need to design a manual expansion mechanism that can provide stable support for the 15t container without relying on the strength of the original top frame of the container, thus preventing the container from deforming, and can also effectively protect the internal moving parts and achieve a reasonable conversion between rotation and support forces. Summary of the Invention

[0007] The technical problems to be solved by this invention are: for existing large-tonnage container houses, especially those whose top frame is cut off due to the installation of embedded sliding covers, the side walls are easily twisted and deformed during leveling and support, causing the hatch doors to be unable to close; and for existing rotary leveling mechanisms, the rotary bearings are easily damaged under heavy load lifting conditions due to continuous huge axial pressure, leading to mechanism jamming.

[0008] The technical solution adopted by this invention to solve its technical problem is: A manually extended mechanism for supporting a modular shelter, characterized in that it comprises: a fixed support assembly, a rotating support arm, leveling legs, and a bearing assembly; The fixed support components are set vertically, with the bottom end of the fixed support components fixedly connected to the bottom wall of the container and the top end of the fixed support components fixedly connected to the top wall of the container, thus forming a load-bearing column connecting the top and bottom walls of the container at the corner; the fixed support components are also equipped with load-bearing steps. One end of the rotating arm is hinged to the fixed support assembly via a pin, and the other end of the rotating arm is connected to the leveling leg. The rotating arm can rotate around the pivot pin to switch the leveling outriggers between the storage position inside the shelter and the working position outside the shelter. The bearing assembly is installed at the connection between the fixed support assembly and the rotating arm; The rotating arm has a rotating state and a supporting state; In the rotating state, the rotating arm abuts against the bearing assembly axially, and there is a gap between the rotating arm and the load-bearing step; In the supported state, the rotating arm abuts against the load-bearing step along the axial direction, so that the bearing assembly is in an unloaded state.

[0009] Preferably, the fixed support assembly includes a lower support column and an upper support column; the bearing assembly is installed at the contact surface between the lower support column and the rotating arm; The lower part of the lower support column is fixedly connected to the bottom wall of the container, and the upper end of the lower support column is provided with an interface for installing the pin shaft. The load-bearing step is set at the upper end of the lower support column. The upper support column is located above the lower support column, and the upper end of the upper support column is fixedly connected to the top wall of the container. The rotating support arm is hinged to the upper end of the lower support column.

[0010] Preferably, the back of the lower support column is fixedly connected to the side wall, front wall, or rear wall of the container. The back of the upper support is fixedly connected to the side wall, front wall, or rear wall of the container. Both the lower and upper supports are box-shaped structures formed by welding square tubes and steel plates.

[0011] Preferably, the load-bearing step is arranged around the pin shaft and is a rigid plane; the end of the rotating arm connected to the fixed support assembly is provided with a mating load-bearing surface; in the supported state, the vertical load applied by the leveling leg is directly transmitted to the load-bearing step through the mating load-bearing surface, and then transmitted to the bottom and top walls of the container via the fixed support assembly.

[0012] Preferably, it also includes a locking mechanism, which includes a positioning hole provided on the rotating arm and a pull pin that cooperates with the positioning hole; The positioning holes are distributed along the rotation center of the rotating arm, corresponding to the storage position and the working position respectively; Pull pins are used to insert into the positioning holes and corresponding holes on the fixed support assembly to limit the rotation of the rotating arm in the horizontal direction.

[0013] Preferably, the bearing assembly is a thrust cylindrical roller bearing; The rotating arm is an I-shaped cantilever beam structure, and the maximum external dimension of a single rotating arm is smaller than the opening size of the container door.

[0014] Preferably, the leveling outrigger is fixed to the end of the rotating arm by bolts, and the leveling outrigger is an electric telescopic outrigger or a hydraulic telescopic outrigger.

[0015] The beneficial effects of this invention include the following: 1. By setting fixed support components to be fixedly connected to the top and bottom walls of the container respectively, a rigid load-bearing column running through the top and bottom of the container is constructed at the corners of the container, forming a force transmission path that directly transfers the support load to the container frame. This effectively solves the problems of container body distortion and door frame misalignment that cannot be closed caused by the top frame of the container being cut off by the embedded sliding cover, and significantly improves the structural stability and sealing safety of the container under heavy load conditions.

[0016] 2. By setting up a cooperative structure between the bearing assembly and the load-bearing step, a self-unloading system is formed in which the bearing bears the load in the rotating state and the rigid step bears the load in the supporting state. This realizes the functional separation of the moving parts and the load-bearing parts, effectively solving the problems of roller crushing, raceway damage and mechanism jamming that are prone to occur when the thrust bearing is supported under a 15t heavy load. This greatly extends the service life of the extension mechanism and ensures smooth operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the manually extended mechanism used for supporting the modular shelter in Example 1; Figure 2 This is a schematic diagram of the manual extension mechanism for supporting the modular shelter installed inside the modular shelter in Example 1.

[0018] Reference numerals: 1. Top wall; 2. Bottom wall; 3. Upper support column; 4. Lower support column; 5. Leveling support leg; 6. Rotating support arm; 7. Pin; 8. Thrust cylindrical roller bearing; 9. Pull pin. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but these specific embodiments do not limit the scope of protection of the present invention in any way. Example

[0020] See appendix Figure 1-2 A manually operated extension mechanism for supporting modular shelters includes an upper support column 3, a lower support column 4, a rotating support arm 6, leveling legs 5, and a thrust bearing 8. This extension mechanism is primarily used for supporting and leveling large-tonnage modular shelters—especially those with their top frames cut off due to the installation of embedded sliding covers. It enables the leveling legs 5 to rotate and extend from inside to outside the shelter without relying on the strength of the shelter's side walls, and effectively prevents shelter deformation.

[0021] The lower support column 4, serving as the fundamental load-bearing component of the entire extension mechanism, has a box-shaped structure and is preferably constructed by welding BS700 high-strength square tubing and Q355 high-strength steel plates. The lower support column 4 is installed at a corner position inside the cabin, with its lower part fixedly connected to the bottom wall 2 of the cabin and its back fixedly connected to the front or rear wall of the cabin. This allows the lower support column 4 to effectively transfer the supporting load to the bottom and side wall frames of the cabin, reducing the impact of pressure on the left and right door frames when the support is under stress and preventing the doors from failing to close due to cabin deformation. The upper end of the lower support column 4 is equipped with an interface for installing the pin assembly 7 and a load-bearing step for heavy load support; the interface is located within the load-bearing step.

[0022] The upper support column 3 is positioned above the lower support column 4, and is a columnar structure welded from BS700 high-strength square tubing and Q355 high-strength steel plate. The lower end of the upper support column 3 is positioned opposite the upper end of the lower support column 4. The lower end of the upper support column 3 also has an interface for installing the pin shaft 7 assembly and a load-bearing step for heavy load support. The interface is located within the load-bearing step. The upper end of the upper support column 3 is fixedly connected to the top wall 1 of the cabin, and the back of the upper support column 3 is fixedly connected to the front or rear wall of the cabin, enabling the upper support column 3 to effectively transfer the supporting load to the top and side wall frames of the cabin. The upper support column 3 and the lower support column 4 together form a complete vertical rigid column inside the cabin, extending through the cabin's height. This structural design is used to re-establish the vertical support system at the corners of the cabin when the transverse frame at the top of the cabin is interrupted by an embedded sliding cover, thereby ensuring the overall strength and morphological stability of the cabin during hoisting, transportation, and lifting.

[0023] The rotating support arm 6 is a movable component connecting the main body of the container and the leveling legs 5. It is a high-strength "I"-shaped cantilever beam structure, welded from BS700 high-strength square tubing and Q355 high-strength steel plate. A pin hole is drilled on one side of the lower end of the rotating support arm 6. This pin hole matches the interface at the upper end of the lower support column 4 and is hinged to the load-bearing step of the lower support column 4 via a pin shaft 7. It can rotate horizontally around the axis of the pin shaft 7. The end of the rotating support arm 6 connected to the lower support column 4 has a mating load-bearing surface. This mating load-bearing surface is flat and is used to ensure a tight fit with the load-bearing step of the lower support column 4 in the supported state. The upper end of the rotating support arm 6 is drilled with four positioning holes, which correspond to the interface at the lower end of the upper support column 3. When the rotating support arm 6 is rotated to the storage position inside the cabin, the pull pin 9 is inserted into the corresponding positioning hole to fix it to the upper support column 3, so as to prevent the support arm from shaking when the vehicle is moving. When the rotating support arm 6 is rotated out of the cabin for work, the pull pin 9 can also be pulled out to release the positioning or inserted into another corresponding positioning hole to lock the working position.

[0024] On the other side of the rotating outrigger 6, a leveling leg 5 is fixedly connected. The leveling leg 5 is a standard hydraulic or electric outrigger structure, which is fixed to the end interface of the rotating outrigger 6 by bolts. It can rotate from inside the cabin to outside the cabin under the drive of the rotating outrigger 6. The leveling leg 5 has a telescopic function, and its extension length can be adjusted according to the ground conditions to achieve horizontal adjustment and stable support of the cabin.

[0025] A thrust cylindrical roller bearing 8 is also provided between the contact surfaces of the rotating support arm 6 and the lower support column 4. Its working principle is as follows: when the support arm is suspended and rotated out, the weight of the rotating support arm 6 and the leveling support leg 5 presses on the thrust cylindrical roller bearing 8. The presence of the thrust cylindrical roller bearing 8 greatly reduces the frictional resistance during rotation, ensuring smooth and unobstructed rotation, allowing the operator to easily manually push the rotating support arm 6 to extend and retract.

[0026] The key self-unloading logic is as follows: when the leveling outrigger 5 extends and contacts the ground and begins to lift and support the container, the huge reaction force causes the rotating outrigger 6 to press tightly against the load-bearing step of the lower support column 4. At this time, the support load is directly transferred from the rotating outrigger 6 to the lower support column 4 and the container frame. The thrust cylindrical thrust bearing 8 no longer bears the main load (it is in a non-stressed or unloaded state), thereby ensuring that the precision bearing is not damaged under heavy load conditions and significantly improving the service life of the mechanism.

[0027] The individual dimensions of the rotating outrigger 6, upper support column 3, and lower support column 4 are all designed to be smaller than the opening size of the cabin door, to facilitate hoisting through the door and assembly inside the cabin. During installation, the lower support column 4 is first fixed to the bottom wall 2 and side wall at the corner of the cabin, then the upper support column 3 is connected and fixed above the lower support column 4 and fixed to the top wall 1, and finally the rotating outrigger 6 is installed. This installation sequence is convenient and the operation is simple.

[0028] The working principle and method of the above-mentioned manual expansion mechanism for modular shelter support are as follows: The first step involves the operators moving the upper support column 3, lower support column 4, and rotating support arm 6—all smaller than the opening of the shelter door—into the shelter in sequence. First, the lower part of the lower support column 4 is fixed to the bottom wall 2, and its back is fixed to the front or rear wall. Next, the upper support column 3 is installed above the lower support column 4, with its upper part fixed to the top wall 1 and its back fixed to the side wall, thus forming a rigid column structure running vertically through the corner of the shelter. Finally, the rotating support arm 6 is installed in the load-bearing step of the lower support column 4 via a pin 7, and thrust cylindrical roller bearings 8 are pre-installed between the contact surfaces. The leveling legs 5 are then fixed to the end of the support arm.

[0029] The second step involves the operator pulling out the pin 9 located in the positioning hole at the upper end of the rotating outrigger 6 to release the outrigger from its locked position inside the cabin. The operator then manually pushes the rotating outrigger 6, causing it to rotate outwards around the pivot pin 7. During this process, the entire weight of the rotating outrigger 6 and the leveling legs 5 is applied to the thrust cylindrical roller bearing 8. The low-friction characteristics of the bearing ensure that the operator can easily and smoothly rotate the outrigger out, preventing jamming.

[0030] Third, when the rotating arm 6 rotates to the predetermined outside working angle, the operator can operate the pull pin 9 again (or use the limiting structure) to position or lock the rotating arm 6 in the horizontal direction to prevent the arm from shaking unexpectedly during subsequent support and to ensure the accuracy of the support point.

[0031] Fourth, the operator drives the leveling outriggers 5 (electric or hydraulic) to extend downwards until they touch the ground and begin lifting the container. As the supporting force gradually increases, the weight of the container begins to be transferred through the rotating outriggers 6. At this time, due to the structural design, the load-bearing surface of the rotating outriggers 6 will press firmly against the load-bearing steps of the lower support column 4.

[0032] This process achieves a crucial force transfer: the enormous vertical support load is directly transferred from the rotating support arm 6 to the lower support column 4 and the cabin frame, which are made of BS700 high-strength square tubing, instead of primarily being transmitted through the thrust cylindrical roller bearing 8. This step ensures that the precision bearings are in a non-stressed or low-stressed state under heavy load conditions, thereby preventing bearing damage and extending their service life, while using rigid columns to prevent cabin deformation.

[0033] Fifth, after the mission is completed, the operator retracts the leveling outriggers 5. At this point, the supporting load disappears, and the weight of the rotating outrigger 6 returns to the thrust bearing 8. The operator pulls out the pin 9 and manually rotates the rotating outrigger 6 back to its internal storage position, then inserts the pin 9 again to secure it, completing the retraction operation. The entire process is simple to operate and meets the needs of rapid response in the field.

[0034] Throughout the entire operation, the components of the expansion mechanism are all welded from high-strength square tubing and high-strength steel plates, ensuring sufficient strength to support the weight of the container. The use of thrust cylindrical roller bearings 8 ensures smooth rotation, and the bearing's design, which prevents stress during the support phase, extends its service life. The locking mechanism of the positioning holes and pull pins 9 not only secures the container during transport to prevent shaking but also locks it during operation to prevent accidental rotation, providing a reliable position locking function. The multi-faceted connection between the lower support column 4 and the container's bottom wall 2, front wall, or rear wall, along with the corner support system formed by the upper support column 3 and the lower support column 4, collectively achieve the technical effects of easy installation, minimal impact on the hatch, and increased container strength, meeting the self-unloading function requirements of large-tonnage container.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any innovative improvements or substitutions based on the present invention should fall within the scope of the claims of the present invention. Furthermore, the parameters, materials, and processes mentioned in the above embodiments are not unique. Without departing from the technical essence of the present invention, those skilled in the art can make various alternative choices, and these alternative solutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A manually operated extension mechanism for supporting modular shelters, characterized in that, include: Fixed support assembly, rotating support arm, leveling support leg, and bearing assembly; The fixed support components are set vertically, with the bottom end of the fixed support components fixedly connected to the bottom wall of the container and the top end of the fixed support components fixedly connected to the top wall of the container, thus forming a load-bearing column connecting the top and bottom walls of the container at the corner; the fixed support components are also equipped with load-bearing steps. One end of the rotating arm is hinged to the fixed support assembly via a pin, and the other end of the rotating arm is connected to the leveling leg. The rotating arm can rotate around the pivot pin to switch the leveling outriggers between the storage position inside the shelter and the working position outside the shelter. The bearing assembly is installed at the connection between the fixed support assembly and the rotating arm; The rotating arm has a rotating state and a supporting state; In the rotating state, the rotating arm abuts against the bearing assembly axially, and there is a gap between the rotating arm and the load-bearing step; In the supported state, the rotating arm abuts against the load-bearing step along the axial direction, so that the bearing assembly is in an unloaded state.

2. The manually extended mechanism for supporting a modular shelter according to claim 1, characterized in that, The fixed support assembly includes a lower support column and an upper support column; the bearing assembly is installed at the contact surface between the lower support column and the rotating arm. The lower part of the lower support column is fixedly connected to the bottom wall of the container, and the upper end of the lower support column is provided with an interface for installing the pin shaft. The load-bearing step is set at the upper end of the lower support column. The upper support column is positioned above the lower support column, and the upper end of the upper support column is fixedly connected to the top wall of the container. The rotating support arm is hinged to the upper end of the lower support column.

3. A manually extended mechanism for supporting a modular shelter according to claim 2, characterized in that, The back of the lower support column is fixedly connected to the side wall, front wall, or rear wall of the container. The back of the upper support column is fixedly connected to the side wall, front wall, or rear wall of the container. Both the lower support column and the upper support column are box-shaped structures formed by welding square tubes and steel plates.

4. The manually extended mechanism for supporting a modular shelter according to claim 1, characterized in that, The load-bearing step is arranged around the pin shaft and is a rigid plane; the end of the rotating arm connected to the fixed support assembly is provided with a mating load-bearing surface; in the supported state, the vertical load applied by the leveling leg is directly transmitted to the load-bearing step through the mating load-bearing surface, and then transmitted to the bottom and top walls of the container via the fixed support assembly.

5. The manually extended mechanism for supporting a modular shelter according to claim 1, characterized in that, It also includes a locking mechanism, which includes a positioning hole opened on the rotating arm and a pull pin that cooperates with the positioning hole; The positioning holes are distributed along the rotation center of the rotating arm, corresponding to the storage position and the working position respectively; The pull pin is used to insert into the positioning hole and the corresponding hole on the fixed support assembly to restrict the rotation of the rotating arm in the horizontal direction.

6. The manually extended mechanism for supporting a modular shelter according to claim 1, characterized in that, The bearing assembly is a thrust cylindrical roller bearing; The rotating support arm is an I-shaped cantilever beam structure, and the maximum external dimension of a single rotating support arm is smaller than the opening size of the cabin door.

7. The manually extended mechanism for supporting a modular shelter according to claim 1, characterized in that, The leveling outrigger is fixed to the end of the rotating arm by bolts. The leveling outrigger is an electrically telescopic outrigger or a hydraulically telescopic outrigger.

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