Shelter lifting hydraulic device

Abstract

The utility model discloses a square cabin lifting hydraulic device, and particularly relates to the technical field of square cabins, the square cabin lifting hydraulic device comprises a square cabin, storage barrels are symmetrically arranged on the outer side of the square cabin, and telescopic barrels are movably installed at the symmetrical positions in the storage barrels, two single-stage hydraulic cylinders II are connected in series and fixed, so that the lifting stroke is increased, the cost is reduced, and the maintenance difficulty is reduced; by increasing the number of the flow distributing and collecting valves, hydraulic oil can be averagely distributed to the third flow distributing and collecting valve and the second flow distributing and collecting valve firstly, and then the hydraulic oil is averagely distributed into the second hydraulic cylinders in the four parallel supporting legs; the opening and closing of the switch valve are controlled through the leveling sensor, so that the oil inlet quantity of the supporting leg oil cylinder can be adjusted, the lifting synchronization error is reduced, and the lifting stability and automatic control are improved; and through the limiting mechanism, when the hydraulic cylinder II breaks down, the upper supporting leg and the middle supporting leg as well as the middle supporting leg and the lower supporting leg can be limited and fixed, and the situation that the square cabin falls suddenly, and the square cabin is collided and damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of square cabins, in particular to a square cabin lifting hydraulic device. Background Art

[0002] A shelter is a box-like workspace organically assembled from various sturdy materials, with a fixed or expandable volume, protective properties, and transportable. Simply put, a shelter is similar to a container, and its standards are developed based on container standards. Different equipment and devices are loaded according to different needs. Compared to containers, shelters offer higher reliability, electromagnetic compatibility, airtightness, and thermal insulation. Shelters domestically and internationally can be broadly divided into expandable and non-expandable shelters. Expandable shelters can be further divided into pull-out and four-plate linkage types based on their different structural methods. Shelters are typically equipped with four hydraulic lift structures to support and adjust their height.

[0003] At present, most of the hydraulic lifting structures (and their legs) used to support the cabin adopt a single-stage hydraulic cylinder structure, and the cylinder body is too long, which makes it inconvenient to retract and extend the legs; the use of multi-stage hydraulic cylinders is expensive and complicated to maintain; and they often use diverter and collector valves to deal with the problem of uneven load of the hydraulic cylinders, that is, the hydraulic oil is evenly distributed to the four parallel leg cylinders, and the synchronization accuracy is low; especially when the eccentric load is large, a single leg needs to be manually adjusted, which is inconvenient to operate; and if the hydraulic cylinder fails during use, it will cause the cabin to fall suddenly, which may easily cause it to collide with the ground and be damaged, making it inconvenient to use and less practical. Utility Model Content

[0004] The purpose of the utility model is to provide a cabin lifting hydraulic device to solve the problems raised in the above background technology.

[0005] The trolley system of claim 1, wherein the trolley system is configured to provide a hydraulic system for lifting the trolley bus, wherein the hydraulic cylinder is symmetrically arranged on the outside of the trolley bus, and a telescopic cylinder is movably installed at a symmetrical position in the trolley system. A hydraulic cylinder is symmetrically arranged in the trolley system, and the telescopic end of the hydraulic cylinder is fixedly connected to the inner wall of the telescopic cylinder. One end of the telescopic cylinder is connected to the upper support leg, and the middle support leg is slidably installed in the upper support leg, and the lower leg is slidably installed in the middle support leg. Hydraulic cylinders are provided at symmetrical positions in the lower legs, and the hydraulic cylinders are fixedly connected to the upper inner wall of the upper leg, and the telescopic ends of the two hydraulic cylinders are respectively fixedly connected to the top of the upper support leg and the bottom of the lower leg. Leveling sensors are provided on one side of the upper support leg in front and the top of the storage cylinder. The hydraulic cylinders and the hydraulic cylinder are connected to the hydraulic system together, and a limiting mechanism is provided on one side of the lower leg and the middle leg.

[0006] Furthermore, the limiting mechanism on one side of the upper leg is connected to the middle leg, and the limiting mechanism on one side of the middle leg is connected to the lower leg. The limiting mechanism includes a shell, and the shell is fixedly installed on one side of the lower part of the middle leg. A gear is rotatably installed in the shell, and a transmission groove adapted to the gear is provided on one side of the middle leg. A plurality of tooth grooves meshing with the gear are provided on the outer wall of the middle leg. A card block meshing with the gear is rotatably installed in the shell, and a pull rod is movably connected to one side of the card block. The outer sleeve of the pull rod A slider is provided, and a sliding groove adapted to the slider is opened at one end of the shell. One end of the pull rod passes through the slider and is connected to a pull handle. Two baffles are sleeved on the outside of the pull rod, and the baffle away from the block is fixedly connected to one end of the slider. A spring is sleeved between the two baffles on the outside of the pull rod. Through the limiting mechanism, when a failure occurs in the hydraulic cylinder 2, the middle support leg and the upper support leg and the middle support leg and the lower support leg can be limited and fixed to avoid the sudden drop of the cabin and its collision and damage, making it easy to use and practical.

[0007] Furthermore, the hydraulic system includes an oil supply port, and the oil supply port is arranged on one side of the storage cylinder, the oil supply port is respectively connected to a reversing valve 1 and a reversing valve 2 through a pipeline, the reversing valve 1 is connected to the hydraulic cylinder 1 through a pipeline, the reversing valve 2 is connected to a diverter and collector valve 1 through a pipeline, the diverter and collector valve 1 is respectively connected to a diverter and collector valve 2 and a diverter and collector valve 3 through pipelines, the diverter and collector valve 2 is connected to the hydraulic cylinder 2 in the rear upper support leg through a pipeline, and the diverter and collector valve 3 is respectively connected to the hydraulic cylinder 2 in the front upper support leg through pipelines. The hydraulic system can first evenly distribute the hydraulic oil to the diverter and collector valve 3 and the diverter and collector valve 2, and then evenly distribute the hydraulic oil to the hydraulic cylinder 2 in the four legs through the diverter and collector valve 3 and the diverter and collector valve 2, and cooperate with the leveling sensor to make the synchronization accuracy of the telescopic movement of the legs high.

[0008] Furthermore, a limiting rod is fixedly installed in the housing and is located between the gear and the block. The limiting rod fits against one side of the block to limit the block, thereby improving the limiting and fixing effect of the block on the gear.

[0009] Furthermore, the block is an arc-shaped structure, the pull rod is hinged to the block, the slider is a cross-shaped structure, and the slider is slidably connected to the pull rod to transmit power, and the structure of the slider cooperates with the slide groove to guide and limit it.

[0010] Furthermore, the diameters of the upper leg, middle leg and lower leg gradually decrease, and the upper leg and the middle leg, and the middle leg and the lower leg are all slidingly connected. The two ends of the spring are respectively fixedly connected to two baffles so that the middle leg and the lower leg can be stored in the upper leg to reduce the space they occupy.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0012] 1. The utility model increases the lifting stroke while reducing costs and maintenance difficulty by fixing two single-stage hydraulic cylinders in series. By increasing the number of diverter and collector valves, the hydraulic oil can be evenly distributed to diverter and collector valves 3 and 2, and then evenly distributed to the hydraulic cylinders 2 in the four parallel outriggers through diverter and collector valves 3 and 2. The leveling sensor controls the opening and closing of the switch valve to adjust the oil supply to the outrigger cylinders, thereby reducing the lifting synchronization error, improving the lifting stability and automatic control, and being easy to use.

[0013] 2. The utility model uses a limiting mechanism to limit and fix the upper and middle legs, and the middle and lower legs when the hydraulic cylinder 2 fails, thereby locking their combined length to prevent the cabin from suddenly falling and causing collisions and damage to the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic structural diagram of the utility model as a whole;

[0016] Figure 2 It is a side structural schematic diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the utility model after the legs are unfolded;

[0018] Figure 4 This utility model Figure 3 A side structural diagram of

[0019] Figure 5 It is a schematic diagram of the structure between the upper supporting leg, the middle supporting leg and the lower supporting leg of the utility model;

[0020] Figure 6 This is a schematic structural diagram of the housing and slider of the utility model;

[0021] Figure 7 It is a schematic diagram of the partial structure between the limiting mechanism and the lower leg of the utility model;

[0022] Figure 8 This is a schematic diagram of the principle of the hydraulic system of the utility model;

[0023] In the figure: 1. Cabin; 2. Storage cylinder; 3. Telescopic cylinder; 4. Hydraulic cylinder 1; 5. Leveling sensor; 6. Upper leg; 7. Middle leg; 8. Lower leg; 9. Hydraulic cylinder 2; 10. Limiting mechanism; 11. Housing; 12. Gear; 13. Block; 14. Slider; 15. Pull rod; 16. Baffle; 17. Spring; 18. Limiting rod; 19. Reversing valve 1; 20. Reversing valve 2; 21. Diverter and collector valve 1; 22. Diverter and collector valve 2; 23. Diverter and collector valve 3. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1 - Figure 8The shown square cabin lifting hydraulic device includes a square cabin 1, a storage cylinder 2 is symmetrically provided on the outside of the square cabin 1, a telescopic cylinder 3 is movably installed at a symmetrical position in the storage cylinder 2, a hydraulic cylinder 4 is symmetrically provided in the storage cylinder 2, and the telescopic end of the hydraulic cylinder 4 is fixedly connected to the inner wall of the telescopic cylinder 3, one end of the telescopic cylinder 3 is connected to the upper support leg 6, a middle support leg 7 is slidably installed in the upper support leg 6, and a lower support leg 8 is slidably installed in the middle support leg 7, hydraulic cylinder 2 9 is symmetrically provided in the lower support leg 8, and the hydraulic cylinder 2 9 is fixedly connected to the upper inner wall of the upper support leg 6, the telescopic ends of the two hydraulic cylinders 2 9 are respectively fixedly connected to the top of the upper support leg 6 and the bottom of the lower leg 8, a leveling sensor 5 is provided on one side of the front upper support leg 6 and the top of the storage cylinder 2, the hydraulic cylinder 2 9 and the hydraulic cylinder 1 4 are commonly connected to the hydraulic system, and a limiting mechanism 10 is provided on one side of the lower part of the upper support leg 6 and the middle support leg 7. In this example, the limiting mechanism 10 on one side of the upper leg 6 is connected to the middle leg 7, and the limiting mechanism 10 on one side of the middle leg 7 is connected to the lower leg 8. The limiting mechanism 10 includes a shell 11, and the shell 11 is fixedly installed on one side of the lower part of the middle leg 7. A gear 12 is rotatably installed in the shell 11, and a transmission groove adapted to the gear 12 is provided on one side of the middle leg 7. A plurality of tooth grooves meshing with the gear 12 are provided on the outer wall of the middle leg 7. A block 13 meshing with the gear 12 is rotatably installed in the shell 11, and a pull rod 15 is movably connected to one side of the block 13. A sliding sleeve is provided on the outer side of the pull rod 15. Block 14, one end of the shell 11 is provided with a slide groove adapted to the slider 14, one end of the pull rod 15 passes through the slider 14 and is connected to a pull handle, two baffles 16 are sleeved on the outside of the pull rod 15, and the baffle 16 on the side away from the block 13 is fixedly connected to one end of the slider 14, and a spring 17 is sleeved between the two baffles 16 on the outside of the pull rod 15. Through the limiting mechanism 10, when the hydraulic cylinder 2 9 fails, the center leg 7 and the upper leg 6 and the center leg 7 and the lower leg 8 can be limited and fixed to avoid the sudden drop of the cabin 1 and its collision and damage, making it easy to use and practical. In this example, the hydraulic system includes an oil supply port, and the oil supply port is arranged on one side of the storage cylinder 2. The oil supply port is connected to a reversing valve 19 and a reversing valve 2 20 through pipelines. The reversing valve 19 is connected to the hydraulic cylinder 1 4 through a pipeline. The reversing valve 2 20 is connected to a diverter and collector valve 1 21 through a pipeline. The diverter and collector valve 1 21 is connected to a diverter and collector valve 2 22 and a diverter and collector valve 3 23 through pipelines. The diverter and collector valve 2 22 is connected to the hydraulic cylinder 2 9 in the rear upper support leg 6 through a pipeline. The diverter and collector valve 3 23 is connected to the hydraulic cylinder 2 9 in the front upper support leg 6 through pipelines. The hydraulic system can first evenly distribute the hydraulic oil to the diverter and collector valve 3 23 and the diverter and collector valve 2 22, and then evenly distribute the hydraulic oil to the hydraulic cylinder 2 9 in the four legs through the diverter and collector valve 3 23 and the diverter and collector valve 2 22. In conjunction with the leveling sensor 5, the synchronization accuracy of the leg telescopic movement is high.

[0026] In this example, a limiting rod 18 is fixedly installed within the housing 11 and is located between the gear 12 and the block 13. The limiting rod 18 engages one side of the block 13 to limit the block 13, thereby improving the block 13's ability to restrict and fix the gear 12. In this example, the block 13 is an arc-shaped structure, the pull rod 15 is hinged to the block 13, and the slider 14 is a cross-shaped structure. The slider 14 is slidably connected to the pull rod 15 to transmit power. The structure of the slider 14 cooperates with the slide groove to guide and limit the position. In this example, the diameters of the upper leg 6, the middle leg 7, and the lower leg 8 gradually decrease, and the upper leg 6 and the middle leg 7, as well as the middle leg 7 and the lower leg 8, are all slidably connected. The ends of the spring 17 are fixedly connected to two baffles 16, respectively, to accommodate the middle leg 7 and the lower leg 8 within the upper leg 6, reducing their occupied space.

[0027] The working principle of the present invention is as follows: when in use, the device obtains the required pressure hydraulic oil through an external oil source; when the cabin 1 is lifted, the reversing valve 19 is first switched to the extended state, and after the telescopic ends of the front and rear hydraulic cylinders 4 are horizontally extended to the position, the reversing valve 19 is switched to the middle position, and then the reversing valve 20 is switched to the extended state, and the hydraulic oil is first evenly distributed to the diverter-collector valve 2 22 and the diverter-collector valve 3 23 through the diverter-collector valve 1 21, and then the hydraulic oil is evenly distributed to the oil cylinders in the four parallel legs through the diverter-collector valve 2 22 and the diverter-collector valve 3 23. When the extension length of the hydraulic cylinder 2 9 in a certain leg is not synchronized with the hydraulic cylinder 2 9 in other legs , the leveling sensor 5 will send a signal to open the switch valves controlling the hydraulic cylinders 2 9 in the other legs, so that they stop extending. After the extension lengths of the hydraulic cylinders 2 9 in the four legs are consistent, the switch valves are closed, and the hydraulic cylinders 2 9 in the four legs continue to extend until they stop after being extended to the full length, and the reversing valve 2 20 is switched to the middle position; when the cabin 1 falls back, the reversing valve 2 20 is first switched to the retracted state, and the hydraulic oil is first evenly distributed to the diverter and collector valve 3 23 and the diverter and collector valve 2 22 through the diverter and collector valve 1 21, and then evenly distributed to the hydraulic cylinders 2 9 in the four parallel legs through the diverter and collector valve 3 23 and the diverter and collector valve 2 22; when the hydraulic cylinder 2 9 in a certain leg is When the retraction length of the telescopic end is not synchronized with the hydraulic cylinders 2 9 in other legs, the leveling sensor 5 will send a signal to open the switch valve controlling the hydraulic cylinder 2 9 in the leg to stop them from retracting. After the retraction lengths of the telescopic ends of the hydraulic cylinders 2 9 in the four legs are consistent, the switch valve is closed, and the telescopic ends of the hydraulic cylinders 2 9 in the four legs continue to retract until they are retracted into place and stop. The reversing valve 20 is switched to the middle position, and then the reversing valve 19 is switched to the retracted state. After the telescopic ends of the hydraulic cylinders 1 4 on the front and rear sides are horizontally retracted into place, the reversing valve 19 is switched to the middle position. This device can realize automatic control of the lifting of the square cabin 1, with high working efficiency, safety, simplicity and practicality. When the hydraulic cylinder 2 9 works to adjust the length of the support leg, the middle support leg 7 and the lower support leg 8 will respectively drive the gear 12 in the limit mechanism 10 to rotate, so that the teeth on the gear 12 will squeeze and push the card block 13 to rotate, thereby separating from the gear 12. At the same time, the card block 13 will push the pull rod 15 to drive the baffle 16 on one side to cooperate with the baffle 16 close to the slider 14 to squeeze the spring 17. At the same time, the pull rod 15 will drive the slider 14 to slide in the slide groove. When the teeth on the gear 12 that squeeze the card block 13 are misaligned with it, the baffle 16 on the side away from the slider 14 will drive the pull rod 15 to drive the card block 13 to reset and rotate under the elastic force of the spring 17, so that the card block 13 is meshed with the gear 12, and so on.When hydraulic cylinder 2 9 fails, the block 13 will lock the gear 12 in place, thereby limiting and fixing the connection between the upper leg 6 and the middle leg 7, and between the middle leg 7 and the lower leg 8. This prevents the shelter 1 from being damaged by a sudden fall, making it easier to use. When the middle leg 7 and the lower leg 8 need to be retracted, the handle is pulled to drive the pull rod 15 and the block 13, separating the block 13 from the gear 12 to perform the retraction operation. This is more convenient to use and more practical.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A shelter lifting hydraulic device, comprising a shelter (1), characterized in that: The outer side of the square cabin (1) is symmetrically provided with a storage cylinder (2), a telescopic cylinder (3) is movably installed in a symmetrical position in the storage cylinder (2), a hydraulic cylinder (4) is symmetrically provided in the storage cylinder (2), and the telescopic end of the hydraulic cylinder (4) is fixedly connected to the inner wall of the telescopic cylinder (3), one end of the telescopic cylinder (3) is connected to an upper leg (6), a middle leg (7) is slidably installed in the upper leg (6), a lower leg (8) is slidably installed in the middle leg (7), and the lower leg (8) is symmetrically installed in the lower leg (8). A hydraulic cylinder (9) is provided, and the hydraulic cylinder (9) is fixedly connected to the upper inner wall of the upper leg (6). The telescopic ends of the two hydraulic cylinders (9) are fixedly connected to the top of the upper leg (6) and the bottom of the lower leg (8) respectively. A leveling sensor (5) is provided on one side of the upper leg (6) and the top of the storage tube (2). The hydraulic cylinder (9) and the hydraulic cylinder (4) are connected to a hydraulic system. A limiting mechanism (10) is provided on one side of the lower part of the upper leg (6) and the middle leg (7).

2. The shelter lifting hydraulic device according to claim 1, characterized in that: The limiting mechanism (10) on one side of the upper leg (6) is connected to the middle leg (7), and the limiting mechanism (10) on one side of the middle leg (7) is connected to the lower leg (8). The limiting mechanism (10) includes a shell (11), and the shell (11) is fixedly installed on one side of the lower part of the middle leg (7). A gear (12) is rotatably installed in the shell (11). A transmission groove adapted to the gear (12) is provided on one side of the middle leg (7). A plurality of tooth grooves meshing with the gear (12) are provided on the outer wall of the middle leg (7). A block (13) meshed with the gear (12) has a pull rod (15) movably connected to one side of the block (13), a slider (14) is sleeved on the outside of the pull rod (15), a sliding groove adapted to the slider (14) is opened at one end of the housing (11), one end of the pull rod (15) passes through the slider (14) and is connected to a pull handle, two baffles (16) are sleeved on the outside of the pull rod (15), and the baffle (16) away from the block (13) is fixedly connected to one end of the slider (14), and a spring (17) is sleeved on the outside of the pull rod (15) between the two baffles (16).

3. The shelter lifting hydraulic device according to claim 1, characterized in that: The hydraulic system includes an oil supply port, and the oil supply port is arranged on one side of the storage cylinder (2). The oil supply port is connected to a reversing valve 1 (19) and a reversing valve 2 (20) through pipelines. The reversing valve 1 (19) is connected to the hydraulic cylinder 1 (4) through a pipeline. The reversing valve 2 (20) is connected to a diverter-collector valve 1 (21) through a pipeline. The diverter-collector valve 1 (21) is connected to a diverter-collector valve 2 (22) and a diverter-collector valve 3 (23) through pipelines. The diverter-collector valve 2 (22) is connected to the hydraulic cylinder 2 (9) in the rear upper support leg (6) through a pipeline. The diverter-collector valve 3 (23) is connected to the hydraulic cylinder 2 (9) in the front upper support leg (6) through pipelines.

4. The shelter lifting hydraulic device according to claim 2, characterized in that: A limiting rod (18) is fixedly installed in the housing (11), and the limiting rod (18) is located between the gear (12) and the clamping block (13), and the limiting rod (18) is in contact with one side of the clamping block (13).

5. The shelter lifting hydraulic device according to claim 2, characterized in that: The clamping block (13) is an arc-shaped structure, the pull rod (15) is hinged to the clamping block (13), the sliding block (14) is a cross-shaped structure, and the sliding block (14) is slidably connected to the pull rod (15).

6. The shelter lifting hydraulic device according to claim 4, characterized in that: The diameters of the upper leg (6), the middle leg (7) and the lower leg (8) gradually decrease, and the upper leg (6) and the middle leg (7), as well as the middle leg (7) and the lower leg (8) are all slidably connected, and the two ends of the spring (17) are fixedly connected to the two baffles (16) respectively.

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