Automatic folding and unfolding support mechanism for special vehicle suitable for low specific pressure field

Abstract

The application relates to an automatic folding and unfolding support mechanism for a special vehicle suitable for a low specific pressure field, and belongs to the technical field of aerospace special vehicle supporting equipment, solves the problems that the support mechanism has low specific pressure adaptability and cannot expand the ground area; the automatic folding and unfolding support mechanism comprises a fixed bottom plate, rotating connecting blocks are installed on the two sides of the fixed bottom plate, folding side plates are connected between the rotating connecting blocks on the same side, the fixed bottom plate and the folding side plates can relatively rotate around the axis of the rotating connecting blocks, and pressure conversion unfolding devices are installed between the folding side plates and the fixed bottom plate. The application is foldable and expandable in the stress surface, the bearing area of the support mechanism is increased, the specific pressure adaptability of the heavy-load vehicle support mechanism is improved, the adaptability range of the special vehicle operation environment is expanded, the actual ground area of the support mechanism is expanded, and the risk of the support mechanism sinking is reduced.

Description

Technical Field

[0001] This invention relates to the field of support equipment technology for aerospace special vehicles, and in particular to an automatic folding and unfolding support mechanism for special vehicles suitable for low specific pressure test fields. Background Technology

[0002] Special vehicles refer to vehicles whose external dimensions, weight, etc. exceed the design vehicle limits and are for special purposes. They are specially made or modified and equipped with fixed devices and equipment. Their main function is not to carry people or goods. When special vehicles are performing special operations, they will work on the ground with different specific pressures (the ratio of the vehicle's maximum usable weight to the ground contact area). During the operation, support mechanisms are usually used to fix them in place to avoid situations where the vehicle sinks into the ground or moves due to the limited support area. This also avoids affecting the accuracy of the operation and the vehicle's departure after the operation.

[0003] As the direct component in contact with the road surface during the leveling of special vehicles, the support mechanism is traditionally constructed of high-strength sheet metal with a constant area and simple design. The high-strength sheet metal is placed on the field floor through a telescopic device to increase the stress area and reduce the specific pressure of the special vehicle on the field floor, thereby achieving the purpose of support.

[0004] When heavy-duty vehicles are leveled in a low-pressure test area, which refers to a test area with a relatively low maximum pressure per unit area, traditional support mechanisms, due to excessive load and limited support area, are prone to sinking of the support chassis. This causes the leveling outriggers of the special vehicle to sink into the ground, which not only affects the leveling accuracy of the special vehicle and thus the operational accuracy of the special vehicle, but also affects the retraction of the leveling outriggers and creates problems for the use, maintenance and upkeep of subsequent leveling components. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide an automatic folding and unfolding support mechanism for special vehicles suitable for low-pressure test surfaces, in order to solve the problems of insufficient support capacity of existing heavy-duty vehicle support chassis for carrying out vehicle unfolding and leveling operations on low-pressure test surfaces, and the problem of adaptability to low-pressure test surfaces. It realizes the folding and unfolding design of traditional support chassis and enhances the support adaptability of heavy-duty vehicles in various test surface environments.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An automatic folding and unfolding support mechanism for special vehicles suitable for low-pressure test areas includes a fixed base plate. Rotating connecting blocks are installed on both sides of the fixed base plate. The rotating connecting blocks on the same side are connected by folding side plates. The fixed base plate and the folding side plates can rotate relative to each other around the axis of the rotating connecting blocks. A pressure conversion unfolding device is installed between the folding side plates and the fixed base plate. Under the action of the pressure conversion unfolding device, the fixed base plate and the folding side plates can switch between working and non-working states. A floating base plate is installed between the pressure conversion unfolding devices.

[0007] Furthermore: the pressure conversion and deployment device includes a guide column installed inside a fixed base plate and an active rotating support block fixed to the upper end of the fixed base plate. The guide column is hollow and has a fixed column slidably connected inside. The fixed columns are connected to each other through a floating base plate. The active rotating support block is rotatably connected to an active rod. A universal ball is installed at the short arm end of the active rod, and the universal ball is in contact with the fixed column. The long arm end of the active rod is rotatably connected to one end of a follower rod. A miniature rolling linear guide pair is installed at the other end of the follower rod. The slide of the miniature rolling linear guide pair is fixed to the fixed base plate, and the miniature rolling linear guide pair is rotatably connected to a driven rod. A passive rotating support block is rotatably connected to the other end of the driven rod, and the passive rotating support block is fixed to the folding side plate.

[0008] Furthermore: an automatic locking device is installed between the fixed base plate and the floating base plate. The automatic locking device includes a diaphragm installed on the lower part of the fixed base plate and a base plate placement groove opened on the lower part of the fixed base plate. The diaphragm is filled with liquid. A liquid guide tube is opened in the fixed base plate located on the diaphragm. A piston cylinder is installed on the upper part of the liquid guide tube, biased towards the base plate placement groove. A piston plate is installed in the piston cylinder. A locking rod is fixed on the piston plate biased towards the base plate placement groove. The piston plate is connected to one end of a switch spring. The other end of the switch spring is fixed to the inner wall of the piston cylinder.

[0009] Furthermore, the upper part of the fixed base plate is hollow, and the fixed base plate is fixed with steel bars in the horizontal and vertical directions.

[0010] Furthermore, a protective cover is installed on the outside of the rotating connecting block.

[0011] Furthermore: a connection interface is installed in the middle of the fixed base plate, and a telescopic device is connected to the connection interface.

[0012] Furthermore, the telescopic device is a hydraulic cylinder.

[0013] Furthermore, a reset device is installed between the fixed base plate and the folding side plate, and the reset device is at least one reset spring installed between the middle of the fixed base plate and the folding side plate.

[0014] Furthermore: the floating base plate is hollow inside.

[0015] Furthermore, a reinforcing bar is fixed between the upper part of the connection interface and the fixed base plate.

[0016] Furthermore, the fixed base plate is covered with cushioning pads on both sides.

[0017] Furthermore, ribs are installed at the contact points between the pressure conversion and deployment device and the fixed base plate.

[0018] The beneficial effects of the above technical solution are as follows: 1. With the help of the floating base plate and the pressure conversion and unfolding device, the folding side plate enables the support structure to be folded and unfolded and the force-bearing surface to be expanded, thereby increasing the load-bearing area of ​​the support structure, improving the specific pressure adaptability of the support structure of heavy-duty vehicles, and expanding the adaptability range of special vehicle operating environments.

[0019] 2. By cleverly utilizing the supporting force provided by the ground to the floating base plate, the unfolding of the folding side plates is powered. The horizontal unfolding action of the folding side plates is achieved by using a combination of mechanical linkages and linear guide pairs, which expands the actual ground contact area of ​​the support mechanism and reduces the risk of the support mechanism sinking.

[0020] 3. The folding side panels, floating base plate, and fixed base plate share the support force provided by the ground, reducing the risk of the support mechanism sinking. Instead of support legs, a flat surface is used to prevent the support mechanism from sinking into the ground, thus avoiding any impact on the leveling accuracy of special vehicles. This facilitates the use, maintenance, and upkeep of subsequent leveling components. At the same time, it reduces the risk of manually laying pressurization equipment under low-pressure conditions, improves the vehicle support capacity of heavy-duty vehicles operating on low-pressure surfaces, and enhances the convenience of special vehicle operations.

[0021] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0022] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention in its non-operating state.

[0024] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle.

[0025] Figure 3 This is a schematic diagram of the structure of the present invention in its working state.

[0026] Figure 4 This is a top view of the invention in its non-operating state.

[0027] Figure 5 This is a top view showing the working state of the present invention.

[0028] Figure 6 This is a schematic diagram of the automatic locking device of the present invention.

[0029] In the diagram: 1. Fixed base plate, 2. Floating base plate, 3. Base plate placement slot, 4. Fixed column, 5. Guide column, 6. Universal ball, 7. Active rod, 8. Active rotating support block, 9. Follower rod, 10. Miniature rolling linear guide pair, 11. Driven rod, 12. Passive rotating support block, 13. Rotating connecting block, 14. Folding side plate, 15. Return spring, 16. Connection interface, 17. Membrane, 18. Liquid guide tube, 19. Piston cylinder, 20. Piston plate, 21. Switch spring, 22. Locking rod, 23. Lock groove, 24. Lock cavity, 25. Sector-shaped cylindrical cavity, 26. Sector-shaped column, 27. Actuating locking rod, 28. Delay spring, 29. Starting locking rod, 30. Pull-back spring, 31. Locking rod sliding cavity. Detailed Implementation

[0030] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0031] Example 1 A specific embodiment of the present invention discloses an automatic folding and unfolding support mechanism (hereinafter referred to as the support mechanism) for special vehicles suitable for low-specific-pressure test areas. Such an automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test areas... Figure 1 As shown, it includes a fixed base plate 1, with rotating connecting blocks 13 installed on both sides of the fixed base plate 1. The rotating connecting blocks 13 on the same side are connected by folding side plates 14. The fixed base plate 1 and the folding side plates 14 can rotate relative to each other around the axis of the rotating connecting blocks 13. A pressure conversion and unfolding device is installed between the folding side plates 14 and the fixed base plate 1. Under the action of the pressure conversion and unfolding device, the fixed base plate 1 and the folding side plates 14 can switch between working and non-working states. A floating base plate 2 is installed between the pressure conversion and unfolding devices.

[0032] When the support mechanism needs to operate, it moves downwards. When the floating base plate 2 contacts the ground, the ground provides support to the floating base plate 2. As the support mechanism continues to move downwards, the support force from the ground on the floating base plate 2 gradually increases. The floating base plate 2 then transmits an upward force to the pressure conversion and deployment device. The pressure conversion and deployment device converts the upward force provided by the floating base plate 2 into a force that drives the folding side plate 14 to rotate, thus rotating the folding side plate 14 outwards. When the folding side plate 14 and the ground of the fixed base plate 1 are on the same plane, the floating base plate 2 rises to its maximum stroke, completing the deployment of the floating base plate 2, achieving the desired effect. Figure 5 The working state shown increases the contact area between the support mechanism and the ground, reducing the risk of the support mechanism sinking.

[0033] When the support mechanism completes its work, it moves upward, the floating base plate 2 detaches from the ground, and the supporting force provided by the ground gradually decreases until it disappears. At this time, due to its own weight, the floating base plate 2 moves downward relative to the fixed base plate 1. The floating base plate 2 no longer limits the pressure conversion deployment device, and the folding side plate 14 can fold back to its original position, achieving the desired result. Figure 4 The working status is shown.

[0034] Preferably, the pressure conversion deployment device includes a guide column 5 installed in the fixed base plate 1 and an active rotating support block 8 fixed to the upper end of the fixed base plate 1. The guide column 5 is hollow and has a through-hole, and a fixed column 4 is slidably connected inside the guide column 5. The fixed columns 4 are connected to each other through a floating base plate 2. The active rotating support block 8 is rotatably connected to an active rod 7. A universal ball 6 is installed at the short arm end of the active rod 7. The universal ball 6 is in contact with the fixed column 4. The long arm end of the active rod 7 is rotatably connected to one end of a follower rod 9. A miniature rolling linear guide pair 10 is installed at the other end of the follower rod 9. The slide of the miniature rolling linear guide pair 10 is fixed on the fixed base plate 1, and the miniature rolling linear guide pair 10 is rotatably connected to a driven rod 11. A passive rotating support block 12 is rotatably connected to the other end of the driven rod 11. The passive rotating support block 12 is fixed on the folding side plate 14.

[0035] like Figure 3 As shown, when the pressure conversion unfolding device is subjected to an upward force provided by the floating base plate 2, the force is transmitted to the universal ball 6. Under the limit of the active rotating support block 8, the universal ball 6 drives the active rod 7 to rotate. The active rod 7 drives the follower rod 9 to move. The follower rod 9 is subjected to a downward force and a force in the horizontal direction away from the active rotating support block 8. The force in the horizontal direction away from the active rotating support block 8 drives the miniature rolling linear guide pair 10 to move towards the driven rod 11. The miniature rolling linear guide pair 10 drives one end of the driven rod 11 to move linearly. Under the action of the rotating connecting block 13, the other end of the driven rod 11 drives the folding side plate 14 to rotate.

[0036] Preferably, an automatic locking device is installed between the fixed base plate 1 and the floating base plate 2, such as... Figure 2 As shown, the automatic locking device includes a diaphragm 17 installed on the lower part of the fixed base plate 1 and a base plate placement groove 3 opened on the lower part of the fixed base plate 1. The diaphragm 17 is filled with liquid. A liquid guide tube 18 is opened in the fixed base plate 1 located on the diaphragm 17. A piston cylinder 19 is installed on the upper part of the liquid guide tube 18, biased towards the base plate placement groove 3. A piston plate 20 is installed in the piston cylinder 19. A locking rod 22 is fixed on the piston plate 20 biased towards the base plate placement groove 3. The piston plate 20 is connected to one end of a switch spring 21. The other end of the switch spring 21 is fixed to the inner wall of the piston cylinder 19.

[0037] During the unfolding process of the folding side plate 14, the film 17 is compressed, and the liquid inside the film 17 enters the piston cylinder 19 through the liquid guide tube 18. The piston plate 20 is compressed and moves towards the bottom plate placement groove 3. During the movement, the locking rod 22 contacts the floating bottom plate 2, and the floating bottom plate 2 limits the locking rod 22. The locking rod 22 stops moving. When the floating bottom plate 2 is in contact with the bottom plate placement groove 3, the locking rod 22 continues to move and enters the locking groove 23, thereby achieving the upper and lower limit of the floating bottom plate 2. This has the function of preventing the folding side plate 14 from rotating during the operation of the support device.

[0038] When the support mechanism completes its work and leaves the ground, the supporting force of the ground on the support mechanism gradually decreases until it disappears. The piston plate 20 moves under the action of the switch spring 21, and the liquid inside it flows back to the cavity between the fixed base plate 1 and the membrane 17 through the liquid guide tube 18. The locking rod 22 retracts into the piston cylinder 19, so that it no longer limits the folding side plate 14.

[0039] Preferably, the upper part of the fixed base plate 1 is hollow, and the fixed base plate 1 is fixed with steel bars in the horizontal and vertical directions. The hollow design of the fixed base plate 1 can reduce the overall weight of the support mechanism, and the steel bars arranged in the horizontal and vertical directions of the fixed base plate 1 can strengthen the fixed base plate 1.

[0040] Preferably, a protective cover is installed on the outside of the rotating connecting block 13 to prevent dust and other debris splashed up by the support mechanism when it comes into contact with the field floor from affecting the operation of the rotating connecting block 13.

[0041] Preferably, a connecting interface 16 is installed in the middle of the fixed base plate 1, and the connecting interface 16 is connected to a telescopic device to realize the up and down movement of the entire support mechanism.

[0042] Preferably, the telescopic device is a hydraulic cylinder, which has the characteristics of high load-bearing capacity and strong overload protection, making it more suitable for special vehicles.

[0043] Preferably, a reset device is installed between the fixed base plate 1 and the folding side plate 14. The reset device is at least one reset spring 15 installed between the middle of the fixed base plate 1 and the folding side plate 14. The reset spring 15 can provide tension for the folding side plate 14 to return to its original position, so that the folding side plate 14 can be automatically folded back when the support mechanism changes to a non-working state.

[0044] Preferably, the floating base plate 2 is hollow inside.

[0045] Preferably, a steel bar is fixed between the upper part of the connection interface 16 and the fixed base plate 1. The steel bar shares the force between the connection interface 16 and the fixed base plate 1, making its structure more stable.

[0046] Preferably, the fixed base plate 1 is covered with cushioning pads on both sides. The cushioning pads can prevent the fixed base plate 1 from directly contacting the folding side plate 14, thereby playing a cushioning role and reducing the sound generated by direct contact.

[0047] Preferably, a rib is installed at the contact point between the pressure conversion and deployment device and the fixed base plate 1 to reinforce the connection between the pressure conversion and deployment device and the fixed base plate 1.

[0048] Example 2 This embodiment 2 is based on embodiment 1, and improves the automatic locking device in embodiment 1, such as... Figure 6As shown, the automatic locking device includes a locking cavity 24, a sector-shaped column cavity 25, a sector-shaped column 26, an actuating locking rod 27, a delay spring 28, an actuating locking rod 29, a return spring 30, and a locking rod sliding cavity 31. The locking cavity 24 is located on both sides inside the floating base plate 2 and is used to limit the floating base plate 2 in conjunction with the actuating locking rod 27. The sector-shaped column cavity 25 is located on both sides at the bottom of the fixed base plate 1 and is used to provide space for the rotation of the sector-shaped column 26. The fixed base plate 1 has a base plate placement groove 3 at the bottom for placing the floating base plate 2, so that when the support mechanism is in the working state, the lower surface of the floating base plate 2 and the lower surface of the fixed base plate 1 are on the same plane. The fixed base plate 1 has a locking rod sliding cavity 31 located on one side of the sector-shaped column cavity 25. The locking rod sliding cavity 31 is used to accommodate the actuating locking rod 27, the delay spring 28, and the other components. The starting locking lever 29 and the return spring 30 provide movement space. A sector-shaped column 26 is rotatably connected inside the sector-shaped column cavity 25 to identify the working or non-working state of the support mechanism. The working state refers to the state when the support device is placed on the field surface, and the non-working state refers to the state when the support device is detached from the field surface. The gap between the support mechanism and the field is identified. One end of the return spring 30 is fixed inside the locking lever sliding cavity 31. The return spring 30 is used to pull the starting locking lever 29 back to its original position when the support mechanism is in the non-working state. The other end of the return spring 30 is fixed to the starting locking lever 29. A time delay spring 28 is installed on one side of the starting locking lever 29. The time delay spring 28 is used to connect the execution locking lever 27 and the starting locking lever 29 and plays a role in delaying transmission. The execution locking lever 27 is installed on the other side of the time delay spring 28.

[0049] As the folding side panel 14 unfolds, the fan-shaped column 26 gradually receives support from the ground. The fan-shaped column 26 rotates within the fan-shaped column cavity 25, gradually pushing the starting locking rod 29 towards the center of the fixed base plate 1. The starting locking rod 29 pushes the delay spring 28 and the execution locking rod 27 towards the center of the fixed base plate 1. When the execution locking rod 27 contacts the floating base plate 2, it stops moving, and the delay spring 28 is compressed. When the floating base plate 2 is fully embedded in the placement slot, the locking cavity 24 within the floating base plate 2 coincides with the center line of the locking rod sliding cavity 31. The execution locking rod 27 is no longer limited by the floating base plate 2. The compressed delay spring 28 drives the execution locking rod 27 to move into the locking cavity 24, thus limiting the vertical movement of the floating base plate 2 by the execution locking rod 27. This prevents the folding side panel 14 from rotating during operation.

[0050] When the support mechanism completes its work and leaves the ground, the supporting force of the ground on the support mechanism gradually decreases until it disappears. The sector column 26 rotates under the action of gravity and no longer limits the starting lock rod 29. The starting lock rod 29 moves into the sector column cavity 25 under the action of the pull-back spring 30. The starting lock rod 29 drives the delay spring 28 and the execution lock rod 27 to move, so that they return to the lock rod sliding cavity 31. The execution lock rod 27 no longer limits the floating base plate 2, and the folding side plate 14 can rotate and retract.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A special vehicle automatic folding and unfolding support mechanism suitable for low specific pressure test fields, comprising a fixed base plate (1), characterized in that, Rotary connecting blocks (13) are installed on both sides of the fixed base plate (1). The rotating connecting blocks (13) on the same side are connected by folding side plates (14). The fixed base plate (1) and the folding side plates (14) can rotate relative to each other around the axis of the rotating connecting blocks (13). A pressure conversion and unfolding device is installed between the folding side plates (14) and the fixed base plate (1). Under the action of the pressure conversion and unfolding device, the fixed base plate (1) and the folding side plates (14) can switch between working and non-working states. A floating base plate (2) is installed between the pressure conversion and unfolding devices. The pressure conversion deployment device includes a guide column (5) installed in a fixed base plate (1) and an active rotating support block (8) fixed to the upper end of the fixed base plate (1). The guide column (5) is hollow and has a through-hole structure, and a fixed column (4) is slidably connected inside the guide column (5). The fixed columns (4) are connected to each other through a floating base plate (2). The active rotating support block (8) is rotatably connected to an active rod (7). A universal ball (6) is installed at the short arm end of the active rod (7). The universal ball (6) and the fixed column (4) are connected to each other. The active rod (7) is rotatably connected to one end of the follower rod (9). The other end of the follower rod (9) is equipped with a miniature rolling linear guide pair (10). The slide of the miniature rolling linear guide pair (10) is fixed on the fixed base plate (1). The miniature rolling linear guide pair (10) is rotatably connected to the driven rod (11). The other end of the driven rod (11) is rotatably connected to a passive rotating support block (12). The passive rotating support block (12) is fixed on the folding side plate (14).

2. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 1, characterized in that, The upper part of the fixed base plate (1) is hollow, and the fixed base plate (1) is reinforced with steel bars in both the horizontal and vertical directions.

3. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 1, characterized in that, A protective cover is installed on the outside of the rotating connecting block (13).

4. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 1, characterized in that, A connecting interface (16) is installed in the middle of the fixed base plate (1), and a telescopic device is connected to the connecting interface (16).

5. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 1, characterized in that, A reset device is installed between the fixed base plate (1) and the folding side plate (14). The reset device is at least one reset spring (15) installed between the middle of the fixed base plate (1) and the folding side plate (14).

6. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 5, characterized in that, The floating base plate (2) is hollow inside.

7. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 4, characterized in that, The telescopic device is a hydraulic cylinder.

8. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 1, characterized in that, The fixed base plate (1) is covered with buffer pads on both sides.

9. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 4, characterized in that, A steel bar is fixed between the upper part of the connection interface (16) and the fixed base plate (1).

10. The automatic folding and unfolding support mechanism for special vehicles suitable for low-specific-pressure test fields according to claim 1, characterized in that, The pressure conversion deployment device is fitted with ribs at the contact point with the fixed base plate (1).

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