A device and method for short-line movement of heavy objects in confined spaces.

Abstract

This invention relates to the field of lifting devices, and discloses a device and method for short-distance movement of heavy objects in confined spaces. The device comprises a lifting cylinder assembly, a telescopic push rod, and a telescopic pull rod to perform clamping, lifting, and moving operations on the heavy object. When the device needs to be moved, it is supported by moving wheels and guide wheels; the device support is moved to a preset position via the guide wheels and moving wheels. When a heavy object needs to be lifted, it is supported by the bottom surface of the lateral section, ensuring stability during the lifting process. The device's ability to switch between two support states as needed effectively improves the safety of lifting heavy objects and reduces the vertical space required for lifting. Furthermore, the telescopic push rod and telescopic pull rod enable clamping and releasing of the heavy object, as well as lateral movement of the heavy object, working in conjunction with the lifting cylinder assembly to complete the lifting and moving operations of heavy objects in confined spaces.

Description

Technical Field

[0001] This invention relates to the field of lifting devices, and more specifically to a device and method for short-line movement of heavy objects in confined spaces. Background Technology

[0002] The resources of overhead cranes and forklifts are generally scarce at construction sites, and are sometimes limited by the space conditions of the storage or use area. If there are obstacles on the upper part of the component to be moved (such as welding roller frame, etc.), the overhead crane has already suspended the heavy object on the upper part of the component, which prevents another overhead crane from acting on the component to be moved. When it is necessary to move heavy equipment or steel plate components at the construction site, which are in complete contact with the ground, it is difficult for the forklift to extend its forks into the bottom of the heavy object.

[0003] Therefore, there is an urgent need for a heavy object moving device that can solve the problem of moving heavy objects in confined spaces at construction sites, and that is simple in principle and easy to operate. Summary of the Invention

[0004] To address the aforementioned deficiencies in existing technologies, a device and method for short-distance movement of heavy objects in confined spaces are provided, enabling the lifting and movement of heavy objects within confined spaces.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A device for moving heavy objects in confined spaces, characterized in that it includes:

[0007] The device support is divided into a horizontal section and a vertical section. The bottom surface of the horizontal section is horizontally laid out and is roughened. The vertical section is fixed to one end of the horizontal section. Several wheel grooves and movable wheels located in the wheel grooves are provided at the bottom of the horizontal section. The height of the movable wheels on the vertical plane is adjustable. The adjustment range of the movable wheels is from fully extending into the wheel groove to extending out of the wheel groove.

[0008] A guide mechanism is set on the side of the vertical section away from the horizontal section. The guide mechanism is equipped with a guide wheel. The guide wheel moves synchronously with the moving wheel in the vertical direction. The guide wheel can rotate 360° in the horizontal plane.

[0009] The lifting and unloading mechanism includes a vertically arranged lifting cylinder assembly, a telescopic push rod and a telescopic pull rod, each fixed at one end to the top of the lifting cylinder assembly, and a connecting plate fixed at the other end of the telescopic push rod and the telescopic pull rod. The telescopic push rod and the telescopic pull rod are both horizontally arranged, with the length of the telescopic push rod being shorter than the length of the telescopic pull rod. The connecting plates located at the ends of the telescopic push rod and the telescopic pull rod are at the same height, and the non-fixed surfaces of the two connecting plates face each other. The extension and retraction strokes of the lifting cylinder assembly, the telescopic push rod, and the telescopic pull rod are determined by the usage requirements of this device.

[0010] According to the above technical solution, a loading and unloading panel unit is set at the top of the horizontal section. The loading and unloading panel includes a loading and unloading panel body, a spring pressure plate, an arc spring, and a rotating shaft. One side of the loading and unloading panel body is rotatably connected to the side of the horizontal section away from the vertical section through the rotating shaft. The spring pressure plate is fixedly set on the side of the loading and unloading panel body close to the vertical section. An arc-shaped slot matching the shape and running trajectory of the spring pressure plate is provided in the vertical section. The arc spring is placed in the arc-shaped slot. The size of the arc-shaped slot must ensure that the limit position of the downward rotation of the loading and unloading panel body is rotated to a horizontal state.

[0011] According to the above technical solution, the guiding mechanism includes a limiting bracket with a rotating shaft in the middle, a ballast block sleeved on the rotating shaft, a connecting rod rotatably connected to the top of the limiting bracket at one end, and a handle located at the other end of the connecting rod; the ballast block rotates freely on the rotating shaft, and a tenon is provided on the ballast block, and a vertically arranged slot is provided on the vertical section, the tenon and the slot match, and the ballast block slides on the vertical section through the tenon and the slot.

[0012] According to the above technical solution, the horizontal section includes an upper support frame, a lower support plate, and a support column hinged to one end of the loading / unloading panel; the support column is vertically fixed on the support plate, and the support frame is located between the vertical section and the support column; the support frame is arranged in a T-shape, with the vertical section of the support frame fixed to the top of the support plate, and the horizontal section of the support frame parallel to the support plate, with gaps between the horizontal section and the support plate; the height of the horizontal section of the support frame does not exceed 1 / 4 of the overall height of the device support; the unloading panel rotates around the support column, and when the unloading panel rotates to a horizontal state, the unloading panel is attached to the upper surface of the support frame; the moving wheels are located at the bottom of the support frame and in the gap between the horizontal section and the support plate, and a through wheel groove is provided on the support plate below the moving wheels; the bottom of the support plate is roughened.

[0013] According to the above technical solution, four movable wheels are set on the device support, and the four wheel grooves are arranged in a rectangular pattern at the four corners of the support. The movable wheel includes a base, a movable wheel hydraulic cylinder, a movable wheel support frame, and a movable wheel body. The base is fixed on the top wall of the wheel groove. The two ends of the movable wheel hydraulic cylinder are respectively fixed between the base and the movable wheel support frame. The movable wheel body is rotatably connected to the movable wheel support frame. The movable wheel hydraulic cylinders move up and down synchronously, thereby ensuring that the four movable wheels are always in the same plane.

[0014] According to the above technical solution, three independent oil pumps and oil tanks are installed on the vertical section. The three independent oil pumps and oil tanks are respectively connected to all the moving wheel hydraulic cylinders, lifting cylinder assemblies, telescopic push rods and telescopic pull rods, and push button switches are installed on the above three hydraulic oil lines.

[0015] According to the above technical solution, the lifting cylinder assembly, telescopic push rod, and telescopic pull rod all use the same oil pump base, and four identical and horizontally parallel telescopic rods; the stroke of the lifting cylinder assembly must ensure that the distance between the telescopic push rod and the telescopic pull rod and the upper surface of the horizontal section is less than the height of the minimum load; the extension stroke of the telescopic push rod and the telescopic pull rod must ensure that the connecting plate can extend out of the horizontal section, and the center of the load falls directly above the horizontal section; the connecting plate is a patterned, rough-surfaced flat plate.

[0016] A method for short-line movement of a heavy object in a confined space, characterized by the following steps:

[0017] S1: Extend the movable wheel out of the wheel groove and move the device bracket from the storage position to the side of the heavy object through the guide mechanism; extend the movable wheel into the wheel groove and support the entire device from the bottom of the transverse section;

[0018] S2: Adjust the height of the lifting cylinder assembly and the length of the telescopic pull rod and the telescopic push rod so that the connecting plate of the telescopic pull rod and the telescopic push rod is clamped on both sides of the heavy object;

[0019] S3: Control the telescopic push rod and telescopic pull rod to retract simultaneously, and adjust the height of the lifting cylinder assembly to place the heavy object on the top surface of the horizontal section;

[0020] S4: Extend the movable wheel out of the wheel groove and move the device bracket to the position where the heavy object is to be placed through the guide mechanism; extend the movable wheel into the wheel groove and support the entire device from the bottom of the transverse section;

[0021] S5: Control the telescopic push rod and telescopic pull rod to extend simultaneously, and adjust the height of the lifting cylinder assembly to place the heavy object in the preset position;

[0022] S6: Retract the telescopic push rod, telescopic pull rod, and lifting cylinder assembly, and use the casters to move the device to its original storage position and insert the casters into the wheel groove.

[0023] According to the above technical solution, in step S3, if a loading and unloading panel unit is included, the height of the lifting cylinder is first adjusted so that the bottom surface of the heavy object is at the same height as the upper surface of the loading and unloading panel unit when it is in a horizontal state. Then, the telescopic push rod and telescopic pull rod are controlled to retract simultaneously, and the bottom surface of the heavy object is used to press the loading and unloading panel to gradually place the heavy object on the loading and unloading panel.

[0024] The present invention has the following beneficial effects:

[0025] 1. Using guide wheels and moving wheels, move the non-vertical side of the horizontal section of the device support to the side of the object to be moved. Then, insert the moving wheels into the wheel grooves. The device is then switched from being supported by the moving wheels and guide wheels to being supported by the bottom surface of the horizontal section.

[0026] Adjust the telescopic push rod and telescopic pull rod to both ends of the heavy object, and clamp the two opposite sides of the heavy object with the connecting plates on the telescopic push rod and telescopic pull rod; then, in conjunction with the lifting cylinder assembly, lift the heavy object to a certain height, and move the heavy object to the center of the moving wheel by extending and retracting the telescopic push rod and telescopic pull rod simultaneously.

[0027] Extend the movable wheel out of the wheel groove, and switch the device bracket from being supported by the bottom of the horizontal section to being supported by the movable wheel and guide wheel. Move the device bracket to the unloading position of the heavy object by using the movable wheel and guide wheel, and repeat the above operation to move the heavy object to the preset position.

[0028] Based on the above measures, the clamping, lifting, and moving of heavy objects are accomplished by the lifting cylinder assembly, telescopic push rod, and telescopic pull rod. When the device needs to be moved, it is supported by moving wheels and guide wheels; the device support is moved to the preset position via the guide wheels and moving wheels. When a heavy object needs to be lifted, it is supported by the bottom surface of the horizontal section, ensuring the stability of the heavy object during the lifting process. The device can switch between two support states as needed, effectively improving the safety of lifting heavy objects and reducing the vertical space required for lifting. In addition, the telescopic push rod and telescopic pull rod enable the clamping and releasing of heavy objects, as well as the lateral movement of heavy objects, working in conjunction with the lifting cylinder assembly to complete the lifting and moving operations of heavy objects in confined spaces.

[0029] 2. The heavy object is clamped by the telescopic push rod and telescopic pull rod, and the lifting cylinder assembly lifts the heavy object to a height close to the hinge of the loading and unloading panel. Then, the telescopic push rod and telescopic pull rod move inward synchronously, and the heavy object presses against the loading and unloading panel body which is in an inclined state (due to the action of the arc spring, one end of the loading and unloading panel body is lifted by the arc spring). The loading and unloading panel body gradually changes from an inclined state to a horizontal state with the rotation axis as the center. During this process, the loading and unloading panel body provides a certain upward support force for the heavy object, and the horizontal loading and unloading panel body plays an auxiliary role in preventing the heavy object from falling. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an embodiment provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the loading and unloading panel provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram showing the connection relationship between the loading / unloading panel and the support column according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the guide portion of the guide mechanism provided in an embodiment of the present invention;

[0034] Figure 5This is a schematic diagram of the structure of the ballast block provided in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the vertical section groove provided in an embodiment of the present invention;

[0036] Figure 7 yes Figure 1 Sectional view of AA;

[0037] Figure 8 This is a schematic diagram of the piping of the moving wheel, oil pump, and oil cylinder according to an embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the structure of the moving wheel provided in an embodiment of the present invention;

[0039] Figure 10 yes Figure 1 Sectional view of BB;

[0040] Figure 11 yes Figure 1 Sectional view of CC;

[0041] In the diagram, 1. Device bracket; 1-1. Horizontal section; 1-11. Support frame; 1-12. Support plate; 1-13. Support column; 1-2. Vertical section; 1-3. Wheel groove; 2. Moving wheel; 2-1. Base; 2-2. Moving wheel hydraulic cylinder; 2-3. Moving wheel support frame; 2-4. Moving wheel body; 3. Guide mechanism; 3-1. Guide wheel; 3-2. Limiting bracket; 3-3. Ballast block; 3-4. Connecting rod; 3-5. Handle; 3-6. Tenon; 3-7. Groove; 4. Lifting cylinder assembly; 5. Telescopic push rod; 6. Telescopic pull rod; 7. Connecting plate; 8. Loading / unloading panel unit; 8-1. Unloading panel body; 8-2. Spring pressure plate; 8-3. Arc spring; 8-4. Rotating shaft; 9. Oil pump and oil tank; 10. Hydraulic cylinder button switch for moving wheels; 11. Lifting cylinder assembly button switch; 12. Telescopic push rod and telescopic pull rod button switch; 13. Telescopic rod. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] Reference Figures 1-11 As shown, the present invention provides a device for moving heavy objects in a confined space.

[0044] Example 1

[0045] like Figure 1 As shown, including

[0046] The device support 1 is divided into a horizontal section 1-1 and a vertical section 1-2. The bottom surface of the horizontal section is horizontally laid out and roughened. The vertical section is fixed to one end of the horizontal section. Several wheel grooves 1-3 and movable wheels 2 located in the wheel grooves are provided at the bottom of the horizontal section. The height of the movable wheels on the vertical plane is adjustable. The adjustment range of the movable wheels is from fully extending into the wheel groove to extending out of the wheel groove. The device support should be made of high-strength alloy steel to ensure the structural strength during use.

[0047] The guide mechanism 3 is set on the side of the vertical section away from the horizontal section. The guide mechanism is equipped with a guide wheel 3-1. The guide wheel moves synchronously with the moving wheel in the vertical direction. The guide wheel can rotate 360° in the horizontal plane.

[0048] The lifting and unloading mechanism includes a vertically arranged lifting cylinder assembly 4, a telescopic push rod 5 and a telescopic pull rod 6, each fixed at one end to the top of the lifting cylinder assembly, and a connecting plate 7 fixed to the other end of the telescopic push rod and the telescopic pull rod. The telescopic push rod and the telescopic pull rod are both horizontally arranged, and the length of the telescopic push rod is less than the length of the telescopic pull rod. The connecting plates located at the ends of the telescopic push rod and the telescopic pull rod are at the same height, and the non-fixed surfaces of the two connecting plates face each other. The extension and retraction stroke of the lifting cylinder assembly, the telescopic push rod, and the telescopic pull rod are determined by the usage requirements of this device.

[0049] In this embodiment, the non-vertical section of the horizontal segment of the device bracket is moved to the side of the object to be moved by the guide wheel and the movable wheel. Then the movable wheel is inserted into the wheel groove, and the device is switched from being supported by the movable wheel and the guide wheel to being supported by the bottom surface of the horizontal segment.

[0050] Adjust the telescopic push rod and telescopic pull rod to both ends of the heavy object, and clamp the two opposite sides of the heavy object with the connecting plates on the telescopic push rod and telescopic pull rod; then, in conjunction with the lifting cylinder assembly, lift the heavy object to a certain height, and move the heavy object to the center of the moving wheel by extending and retracting the telescopic push rod and telescopic pull rod simultaneously.

[0051] Extend the movable wheel out of the wheel groove, and switch the device bracket from being supported by the bottom of the horizontal section to being supported by the movable wheel and guide wheel. Move the device bracket to the unloading position of the heavy object by using the movable wheel and guide wheel, and repeat the above operation to move the heavy object to the preset position.

[0052] Based on the above measures, when the device needs to be moved, it is supported by moving wheels and guide wheels; when it needs to clamp, lift, or move heavy objects, the device is supported by the bottom of the horizontal section of the support frame, which can effectively improve the safety of lifting heavy objects and reduce the vertical space required for lifting heavy objects. In addition, telescopic push rods and telescopic pull rods are provided to clamp and release heavy objects, as well as to move them laterally. Together with the lifting cylinder assembly, this allows for lifting and moving heavy objects in confined spaces. In confined areas, simply move the device frame to the edge of the area, extend the telescopic push rods and telescopic pull rods into the space, and use the two connecting plates to clamp the heavy object to complete the clamping and translation operations. During this process, the lifting cylinder assembly completes the lifting operation. Furthermore, because the moving wheels extend into the wheel grooves during lifting operations, the overall height of the device frame is reduced, making it easier to operate in confined spaces.

[0053] Example 2

[0054] like Figure 2-3 As shown, the structure and principle of Embodiment 2 are similar to those of Embodiment 1, except that: it provides effective support for the heavy object to prevent it from falling; a loading and unloading panel unit 8 is provided at the top of the horizontal section, the loading and unloading panel includes a loading and unloading panel body 8-1, a spring pressure plate 8-2, an arc spring 8-3, and a rotating shaft 8-4; one side of the loading and unloading panel body is rotatably connected to the side of the horizontal section away from the vertical section via the rotating shaft, and the spring pressure plate is fixedly installed on the side of the loading and unloading panel body close to the vertical section; an arc-shaped slot matching the shape and running trajectory of the spring pressure plate is provided in the vertical section, and the arc spring is placed in the arc-shaped slot; the size of the arc-shaped slot must ensure that the limit position of the downward rotation of the loading and unloading panel body is rotated to a horizontal state.

[0055] In this embodiment, the heavy object is clamped by the telescopic push rod and telescopic pull rod, and the heavy object is lifted to a height close to the hinge of the loading and unloading panel according to the lifting cylinder assembly. Then, the telescopic push rod and telescopic pull rod move inward synchronously, and the heavy object squeezes the loading and unloading panel body which is in an inclined state (due to the action of the arc spring, one end of the loading and unloading panel body is lifted by the arc spring). The loading and unloading panel body gradually changes from an inclined state to a horizontal state with the rotation axis as the center. During this process, the loading and unloading panel body provides a certain upward support force for the heavy object, and the horizontal loading and unloading panel body plays an auxiliary role in preventing the heavy object from falling.

[0056] Example 3

[0057] like Figure 4-6 As shown, the structure and principle of Embodiment 3 are similar to those of Embodiments 1 and 2, except that a preferred implementation of the guiding mechanism is given.

[0058] Specifically, the guiding mechanism includes a limiting bracket 3-2 with a rotating shaft in the middle, a ballast block 3-3 sleeved on the rotating shaft, a connecting rod 3-4 rotatably connected to the top of the limiting bracket at one end, and a handle 3-5 located at the other end of the connecting rod; the ballast block rotates freely on the rotating shaft, and a tenon 3-6 is provided on the ballast block, and a vertically arranged slot 3-7 is provided on the vertical section. The tenon and the slot match, and the ballast block slides on the vertical section through the tenon and the slot.

[0059] In this embodiment, the limiting bracket is slidably connected to the vertical section via a ballast block, and under the weight of the ballast block, the guide wheel at the bottom of the limiting bracket is pressed tightly against the ground. Furthermore, due to the tenon and slot, when the device bracket directly contacts the bottom surface, the guide wheel moves synchronously with the moving wheel on the vertical plane under the influence of gravity. The bottom end of the connecting rod is hinged to the limiting bracket, and the height of the handle is adjusted by rotating the connecting rod. Since the limiting bracket and the clamping block are rotatably connected, the direction of travel of the guide wheel can also be adjusted by the handle. The mortise and tenon structure between the ballast block and the vertical section better transmits the steering force of the guiding mechanism to the device bracket. The contact surfaces of the tenon and slot must be sufficiently smooth to ensure smooth sliding of the ballast block on the vertical section.

[0060] Example 4

[0061] like Figure 1-7 As shown, the structure and principle of Embodiment 4 are similar to those of Embodiment 2, except that a preferred structural form of the transverse section is provided to facilitate the installation and removal of the panel and the arrangement of the moving wheels. The horizontal section includes an upper support frame 1-11, a lower support plate 1-12, and a support column 1-13 hinged to one end of the loading / unloading panel. The support column is vertically fixed to the support plate, and the support frame is located between the vertical section and the support column. The support frame is arranged in a T-shape, with the vertical section fixed to the top of the support plate and the horizontal section parallel to the support plate, leaving gaps on both sides of the horizontal section and between the horizontal section and the support plate. The height of the horizontal section of the support frame does not exceed 1 / 4 of the overall height of the device support, which not only lowers the overall center of gravity of the device but also ensures that the device can be used in confined spaces. The unloading panel rotates around the support column, and when the unloading panel rotates to a horizontal position, the unloading panel is attached to the upper surface of the support frame. The moving wheels are located at the bottom of the support frame and in the gap between the horizontal section and the support plate, and a through wheel groove is provided on the support plate below the moving wheels. The bottom of the support plate is roughened.

[0062] Example 5

[0063] like Figure 1-9 As shown, the structure and principle of Embodiment 5 are similar to those of Embodiment 1 or 4, except that a preferred arrangement of the moving wheels is provided.

[0064] Four movable wheels are mounted on a support frame, with four wheel grooves arranged in a rectangular pattern at the four corners of the frame. Each movable wheel includes a base 2-1, a movable wheel hydraulic cylinder 2-2, a movable wheel support frame 2-3, and a movable wheel body 2-4. The base is fixed to the top wall of the wheel groove. The two ends of the movable wheel hydraulic cylinder are respectively fixed between the base and the movable wheel support frame. The movable wheel body is rotatably connected to the movable wheel support frame. The movable wheel hydraulic cylinders move up and down synchronously, ensuring that the four movable wheels are always in the same plane. In this embodiment, the retraction of the movable wheel hydraulic cylinders is controlled as needed to fully retract or extend the movable wheel body from the wheel groove. The axles of the four movable wheels are connected to the movable wheel support frame using ball bearings, making the movement of the device easier. In addition, the movable wheels should be wider and made of tire material as the outer wheels to increase the wheel's footprint and grip.

[0065] In this embodiment, three independent oil pumps and oil tanks 9 are provided on the vertical section. The three independent oil pumps and oil tanks are respectively connected to all the moving wheel hydraulic cylinders, lifting cylinder assemblies, and telescopic push rods and telescopic pull rods. Push-button switches are provided on the above three hydraulic circuits (as shown in the figure, moving wheel hydraulic cylinder push-button switch 10, lifting cylinder assembly push-button switch 11, and telescopic push rod and telescopic pull rod push-button switch 12) to achieve the effect of independent operation of each mechanism. In addition, the three independent oil pumps and oil tanks provided on the vertical section can serve as ballast blocks for the entire device to prevent the device from moving when loading and unloading heavy objects.

[0066] like Figure 10-11 As shown, the lifting cylinder assembly, telescopic push rod, and telescopic pull rod all use the same oil pump base, with four identical and horizontally parallel telescopic rods 13 to ensure a smooth and reliable lifting process of the lifting cylinder and the extension and retraction processes of the telescopic push rod and telescopic pull rod. The stroke of the lifting cylinder assembly must ensure that the distance between the telescopic push rod and telescopic pull rod and the upper surface of the transverse section is less than the height of the minimum load. The extension and retraction stroke of the telescopic push rod and telescopic pull rod must ensure that the connecting plate can extend out of the transverse section, and the center of the load falls directly above the transverse section. The connecting plate is a patterned, rough-surfaced flat plate.

[0067] In addition, the present invention also provides a method for short-line movement of heavy objects in confined spaces.

[0068] Example 1

[0069] Includes the following steps:

[0070] S1: Extend the movable wheels out of the wheel grooves and move the device support from its storage position to the side of the load using the guide mechanism; extend the movable wheels into the wheel grooves, with the entire device supported by the bottom of the transverse section; specifically, before use, fill the oil inlets of the three oil tanks with oil, and then check for any oil leaks around the device. Ensure all telescopic rods are in their shortest position. If there are no problems, press the movable wheel hydraulic cylinder button switch. Adjust the height of the entire device according to the site conditions. Once a suitable height is reached, stop pressing the movable wheel hydraulic cylinder button switch, move the device to the designated position (the designated position means that the right end of the device is close to the load to be loaded), and then completely retract the four movable wheels into the wheel grooves.

[0071] S2: Adjust the height of the lifting cylinder assembly and the length of the telescopic pull rod and push rod so that the connecting plates of the telescopic pull rod and push rod clamp tightly to both sides of the load. Specifically, according to the height of the load to be loaded, press the button switch of the lifting cylinder assembly to raise the telescopic push rod and telescopic pull rod to the appropriate height. Then press the button switch of the telescopic pull rod to extend the pull rod. Then press and hold the button switch of the lifting cylinder assembly to make the connecting plate of the pull rod fit snugly against the straight section of the load to be loaded. Finally, press and hold the button switch of the telescopic push rod to make the connecting plate of the push rod clamp the load.

[0072] S3: Control the telescopic push rod and telescopic pull rod to retract simultaneously, and adjust the height of the lifting cylinder assembly to place the heavy object on the top surface of the horizontal section; specifically, press and hold the button switches for the telescopic push rod and telescopic pull rod simultaneously, and then stop the heavy object when it moves close to the loading limit plate.

[0073] S4: Extend the movable wheels out of the wheel grooves and move the device support to the position where the heavy object will be placed using the guide mechanism; extend the movable wheels into the wheel grooves, with the entire device supported by the bottom of the transverse section; specifically, press the movable wheel hydraulic cylinder button switch according to the site conditions, and extend the height of the movable wheels according to the road surface conditions. Pull the guide mechanism handle to move the heavy object to the predetermined position by steering; the right edge of the device is the predetermined position. Press the movable wheel hydraulic cylinder button switch to completely retract all four movable wheels into the wheel grooves.

[0074] S5: Control the simultaneous extension of the telescopic push rod and telescopic pull rod, adjust the height of the lifting cylinder assembly to place the load at the preset position; specifically, simultaneously press and hold the push rod and pull rod button switches, push the load until it leaves the device and reaches the predetermined position, then stop pressing the push rod and pull rod button switches. Press and hold the lifting cylinder assembly button switch until the load lands, then stop pressing the button.

[0075] S6: Retract the telescopic push rod, telescopic pull rod, and lifting cylinder assembly. Use the casters to move the device to its original storage position and insert the casters into the wheel grooves. Specifically, press and hold the telescopic pull rod button switch to move the pull rod connecting plate away from the load. Then press and hold the telescopic push rod button switch to move the push rod connecting plate away from the load. Press and hold the lifting cylinder assembly button switch to move the loading / unloading mechanism push / pull rod away from the top of the load. First, press and hold the telescopic push rod button switch to retract the push rod; then press and hold the telescopic pull rod button switch to retract the pull rod; subsequently, press and hold the lifting cylinder assembly button switch to retract the loading / unloading mechanism hydraulic top frame; finally, use the guide mechanism and casters to move the device to its original storage position and insert the casters into the wheel grooves.

[0076] Example 2

[0077] The method in Example 2 is similar to that in Example 1, except that in step S3, if a loading / unloading panel unit is included, the height of the lifting cylinder is first adjusted so that the bottom surface of the load is at the same height as the upper surface of the loading / unloading panel unit when it is horizontal. Then, the telescopic push rod and telescopic pull rod are controlled to retract simultaneously, using the bottom surface of the load to press against the loading / unloading panel, gradually placing the load on the loading / unloading panel. Specifically, the lifting cylinder assembly button switch is pressed, and the bottom of the load is observed to be approximately at the same height as the loading panel when the button is stopped.

[0078] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A device for moving heavy objects in a confined space, characterized in that: include The device support is divided into a horizontal section and a vertical section. The bottom surface of the horizontal section is horizontally laid out and is roughened. The vertical section is fixed to one end of the horizontal section. Several wheel grooves and movable wheels located in the wheel grooves are provided at the bottom of the horizontal section. The height of the movable wheels on the vertical plane is adjustable. The adjustment range of the movable wheels is from fully extending into the wheel groove to extending out of the wheel groove. A guide mechanism is set on the side of the vertical section away from the horizontal section. The guide mechanism is equipped with a guide wheel. The guide wheel moves synchronously with the moving wheel in the vertical direction. The guide wheel can rotate 360° in the horizontal plane. The lifting and loading mechanism includes a vertically arranged lifting cylinder assembly, a telescopic push rod and a telescopic pull rod, each fixed at one end to the top of the lifting cylinder assembly, and a connecting plate fixed at the other end of the telescopic push rod and the telescopic pull rod. The telescopic push rod and the telescopic pull rod are both horizontally arranged, and the length of the telescopic push rod is less than the length of the telescopic pull rod. The connecting plates located at the ends of the telescopic push rod and the telescopic pull rod are at the same height, and the non-fixed surfaces of the two connecting plates face each other. A loading and unloading panel unit is installed at the top of the horizontal section. The loading and unloading panel unit includes a loading and unloading panel body, a spring pressure plate, an arc spring, and a rotating shaft. One side of the loading and unloading panel body is rotatably connected to the side of the horizontal section away from the vertical section via the rotating shaft. The spring pressure plate is fixedly installed on the side of the loading and unloading panel body close to the vertical section. An arc-shaped slot matching the shape and running trajectory of the spring pressure plate is provided in the vertical section. The arc spring is placed in the arc-shaped slot. The size of the arc-shaped slot must ensure that the limit position of the downward rotation of the loading and unloading panel body is rotated to a horizontal state.

2. The device for moving heavy objects in a confined space according to claim 1, characterized in that: The guiding mechanism includes a limiting bracket with a rotating shaft in the middle, a ballast block sleeved on the rotating shaft, a connecting rod rotatably connected to the top of the limiting bracket at one end, and a handle located at the other end of the connecting rod; the ballast block rotates freely on the rotating shaft, and a tenon is provided on the ballast block, and a vertically arranged slot is provided on the vertical section, the tenon and the slot match, and the ballast block slides on the vertical section through the tenon and the slot.

3. The device for moving heavy objects in a confined space according to claim 1, characterized in that: The horizontal section includes an upper support frame, a lower support plate, and a support column hinged to one end of the loading / unloading panel body. The support column is vertically fixed to the support plate, and the support frame is located between the vertical section and the support column. The support frame is arranged in a T-shape, with the vertical section fixed to the top of the support plate and the horizontal section parallel to the support plate, leaving gaps on both sides of the horizontal section and between the horizontal section and the support plate. The height of the horizontal section of the support frame does not exceed 1 / 4 of the overall height of the device support. The loading / unloading panel body rotates around the support column, and when the loading / unloading panel body rotates to a horizontal position, it adheres to the upper surface of the support frame. The moving wheels are located at the bottom of the support frame and within the gap between the horizontal section and the support plate, with through-grooves on the support plate below the moving wheels. The bottom of the support plate is roughened.

4. The device for moving heavy objects in a confined space according to claim 1 or 3, characterized in that: Four movable wheels are installed on the device support, and the four wheel grooves are arranged in a rectangular pattern at the four corners of the support. Each movable wheel includes a base, a movable wheel hydraulic cylinder, a movable wheel support frame, and a movable wheel body. The base is fixed on the top wall of the wheel groove. The two ends of the movable wheel hydraulic cylinder are respectively fixed between the base and the movable wheel support frame. The movable wheel body is rotatably connected to the movable wheel support frame. The movable wheel hydraulic cylinders move up and down synchronously, thereby ensuring that the four movable wheels are always in the same plane.

5. The device for moving heavy objects in a confined space according to claim 4, characterized in that: Three independent oil pumps and oil tanks are installed on the vertical section. The three independent oil pumps and oil tanks are respectively connected to all the moving wheel hydraulic cylinders, lifting cylinder assemblies, telescopic push rods and telescopic pull rods, and push button switches are installed on the above three hydraulic oil lines.

6. The device for moving heavy objects in a confined space according to claim 5, characterized in that: The lifting cylinder assembly, telescopic push rod, and telescopic pull rod all use the same oil pump base, with four identical and horizontally parallel telescopic rods. The stroke of the lifting cylinder assembly must ensure that the distance between the telescopic push rod and the telescopic pull rod and the upper surface of the horizontal section is less than the height of the minimum load. The extension stroke of the telescopic push rod and the telescopic pull rod must ensure that the connecting plate can extend out of the horizontal section, and the center of the load falls directly above the horizontal section. The connecting plate is a patterned, rough-surfaced flat plate.

7. A method for short-line movement of a heavy object in a confined space, characterized in that: The device for moving heavy objects in a confined space as described in any one of claims 1-6 is used. The method includes the following steps: S1: Extend the movable wheel out of the wheel groove and move the device bracket from the storage position to the side of the heavy object through the guide mechanism; extend the movable wheel into the wheel groove and support the entire device from the bottom of the transverse section; S2: Adjust the height of the lifting cylinder assembly and the length of the telescopic pull rod and the telescopic push rod so that the connecting plate of the telescopic pull rod and the telescopic push rod is clamped on both sides of the heavy object; S3: Control the telescopic push rod and telescopic pull rod to retract simultaneously, and adjust the height of the lifting cylinder assembly to place the heavy object on the top surface of the horizontal section; S4: Extend the movable wheel out of the wheel groove and move the device bracket to the position where the heavy object is to be placed through the guide mechanism; extend the movable wheel into the wheel groove and support the entire device from the bottom of the transverse section; S5: Control the telescopic push rod and telescopic pull rod to extend simultaneously, and adjust the height of the lifting cylinder assembly to place the heavy object in the preset position; S6: Retract the telescopic push rod, telescopic pull rod, and lifting cylinder assembly, and use the casters to move the device to its original storage position and insert the casters into the wheel groove.

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