A quick-assembly gantry lifting device and its use method

Abstract

The present invention relates to the technical field of gantry lifting, and discloses a quick-assembly gantry lifting device and a method for using the same. The lifting device includes two bases, symmetrically distributed casters are fixed below the bases, and a support frame is rotatably provided above the bases. Control members for controlling the rotation of the support frame are slidably provided on both sides of the bases. The lifting device also includes a crossbeam, which is slidably connected to the support frame. The crossbeam is located above the support frame, and a leveling assembly for leveling the crossbeam is fixed on the support frame. The lifting device of the present invention can be folded when idle, which is convenient for disassembly, assembly and transportation. After folding, the combined structure of the base, casters and control member can be used as a cart. At this time, the support frame is folded above the cart, which saves manpower in the process of transporting the lifting device. When assembling the lifting device, the control member can also be used to control the support frame body to rotate vertically, so the control member can be used for multiple purposes.

Description

Technical Field

[0001] The present invention belongs to the technical field of gantry lifting, and in particular relates to a quick-assembly gantry lifting device and a use method thereof. Background Art

[0002] Gantry cranes are a variation of bridge cranes. They are primarily used for loading and unloading cargo in freight yards, material yards, and bulk cargo. Their metal structure resembles a portal frame, with two supporting legs mounted beneath the main beam. Gantry cranes are widely used due to their high site utilization, large operating range, wide adaptability, and strong versatility.

[0003] In order to facilitate transportation, a gantry lifting device is usually set as an assembled structure. However, when assembling the existing assembled gantry lifting device, the various components of the assembled gantry lifting device are usually manually fixed by bolts. In order to avoid dislocation during assembly, multiple people are required to fix the installed components together. Therefore, a large amount of manpower and material resources are required when assembling the assembled gantry lifting device. In order to solve the above problems, a quick-assembly gantry lifting device and a method for using the same are now provided.

[0004] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a quick-assembly gantry lifting device and a method of using the same, which can be folded when idle, making disassembly and transportation convenient. After folding, the combined structure of the base, casters and control components can be used as a cart. At this time, the support frame is folded above the cart, saving manpower in the process of transporting the lifting device. When assembling the lifting device, the control component can also be used to control the support frame body to rotate vertically.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A quick-assembly gantry lifting device, the lifting device includes two bases, symmetrically distributed casters are fixed below the bases, and a support frame is rotatably provided above the bases. Control parts for controlling the rotation of the support frame are slidably provided on both sides of the bases. The lifting device also includes a crossbeam, which is slidably connected to the support frame. The crossbeam is located above the support frame, and a leveling component for leveling the crossbeam is fixed on the support frame.

[0008] The base includes a base body. A first connecting bar is fixed on the top of the base body. A rotation hole is formed on the first connecting bar.

[0009] The support frame includes a support frame body that rotates in the rotating hole. A U-shaped bracket is rotatably provided at one end of the support frame body away from the rotating hole. A first slider is fixed on the U-shaped bracket. The first slider is slidably connected to the beam.

[0010] Furthermore, horizontal first slide rails are provided on both sides of the base body, and the axis of the rotating hole is perpendicular to the first slide rails.

[0011] The control component includes an electric second slider, which slides in the first slide rail, a drive box is fixed on the second slider, a first motor is fixed in the drive box, an output shaft of the first motor passes through the drive box and is vertically fixed to a side plate on a side away from the support frame body, a second U-shaped bracket is fixed on the output shaft of the first electric telescopic rod, a second connecting block is rotatably provided on the second U-shaped bracket, a second motor for driving the second connecting block to rotate is fixed on the second U-shaped bracket, a horizontal second electric telescopic rod is fixed on the second connecting block, and a splint is fixed on the output shaft of the second electric telescopic rod.

[0012] Furthermore, a hook is fixed at one end of the splint, and the corresponding hooks on the two bases are in opposite directions.

[0013] Furthermore, the crossbeam includes a linear slide rail, and a second connecting bar is fixed on both sides of the linear slide rail.

[0014] The leveling assembly includes two first sleeves fixed on the support frame body, a vertical first push rod is slidably provided on the first sleeve, the first push rod is located below the second connecting bar, a first connecting plate is connected between the two first push rods, a second sleeve is also fixed on the support frame body, a first bevel gear is rotatably provided on the second sleeve, and a screw rod that is threadedly engaged with the first connecting plate is fixed on the rotating shaft of the first bevel gear.

[0015] Furthermore, a first vertical plate is fixed on the support frame body, a second bevel gear meshing with the first bevel gear is rotatably provided on the first vertical plate, a first gear is fixed on the rotating shaft of the second bevel gear, a third shaft sleeve is fixed on the support frame body, a vertical first slide rod is slidably provided on the third shaft sleeve, and a rack meshing with the first gear is fixed on the upper end of the first slide rod.

[0016] Furthermore, a second hook is fixed to the lower end of the first sliding rod.

[0017] Furthermore, the lifting components are slidingly symmetrically distributed on the beam.

[0018] The lifting assembly includes a winch sliding in the linear slide rail, and a hook is fixed on the rope of the winch.

[0019] Furthermore, L-shaped connecting plates are fixed to both ends of the first connecting strip, and the L-shaped connecting plates are provided with insertion holes, which are located directly below the rotating hole.

[0020] A vertical second slide rail is provided on both sides of the support frame body. An insertion rod cooperating with the insertion hole is slidably provided in the second slide rail. A driving block is vertically fixed on the insertion rod.

[0021] Furthermore, the crossbeam also includes two guide shafts, which are fixed at two end positions close to the linear slide rail, and a first hook is fixed on the support frame body.

[0022] A method for using a quick-assembly gantry lifting device, the method comprising the following steps:

[0023] Before assembling the lifting device, the insertion rod is disengaged from the insertion hole, the first push rod is disengaged from the second connecting strip, the first electric telescopic rod is rotated to a horizontal position close to the middle position of the two bases, and the corresponding hooks on the two bases are hooked together. At this time, the combined structure of the base, the casters and the control component is used as a cart, and the support frame is folded above the cart.

[0024] When assembling the lifting device, the following steps are included:

[0025] S1: fixed hook;

[0026] The hook is passed around the guide shaft close to the hook and then hooked on the first hook close to the hook.

[0027] S2: Assemble the support frame body;

[0028] By controlling the corresponding hooks on the two bases to separate from each other, by adjusting the two clamps on the same base to be located on both sides of the corresponding support frame body, and by starting the first motor to control the support frame body to rotate vertically, when the support frame body is vertical, under the action of gravity, the insertion rod is automatically inserted into the corresponding socket.

[0029] S3: Adjust the distance between the two bases according to site needs;

[0030] By hooking the hook on one of the control members on the base onto a support body near the base, the corresponding first electric telescopic rod is horizontal during hooking, and the corresponding base is controlled to move by extending and retracting the first electric telescopic rod.

[0031] S4: Leveling linear slide rail;

[0032] By activating one of the control members on the base, the corresponding hook is hooked on the second hook. When hooked, the corresponding first electric telescopic rod is vertical. The U-shaped bracket is controlled to rotate by extending the first electric telescopic rod. When the U-shaped bracket rotates to the vertical, the first electric telescopic rod is paused, and the linear slide rail is adjusted to the horizontal state.

[0033] S5: adjust the position of the beam;

[0034] The two lifting assemblies are adjusted to be at the same distance from the center of the linear slide rail, and the winches are started to control the ropes on the two winches to be tightened.

[0035] S6: fixed beam;

[0036] The first electric telescopic rod is started again to control the first push rod to move upward to press the second connecting strip, thereby fixing the crossbeam.

[0037] S7: Remove the hook.

[0038] The present invention provides a quick-assembly gantry lifting device and a method of using the same, which have the following beneficial effects compared with the prior art:

[0039] 1. The lifting device of the present invention can be folded when idle, which is convenient for disassembly, assembly and transportation. At the same time, after folding, the combined structure of the base, casters and control member can be used as a cart. At this time, the support frame is folded above the cart, which saves manpower in the process of transporting the lifting device. When assembling the lifting device, the control member can also be used to control the support frame body to rotate vertically. Therefore, the control member can be used for multiple purposes, thereby improving its application rate;

[0040] 2. When adjusting the position of the crossbeam, the lifting device of the present invention can adjust the crossbeam to the center with the help of the hook and winch on the lifting assembly, which is convenient for adjustment and further saves manpower;

[0041] 3. The lifting device of the present invention is adjusted by hooking a hook on one of the control members on the base to a support body near the base. The support body can be a fixed object such as a shelf or a support column. When hooked, the corresponding first electric telescopic rod is horizontal. By extending and retracting the first electric telescopic rod, the corresponding base is controlled to move, thereby realizing automatic adjustment of the distance between the bases.

[0042] 4. The leveling assembly in the lifting device of the present invention can not only level the beam, but also fix the beam after the position adjustment of the beam is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic structural diagram of the lifting device of the present invention from the first perspective.

[0044] Figure 2 It is a partial structural schematic diagram of the lifting device of the present invention.

[0045] Figure 3 This is a schematic diagram of the enlarged structure at point A in 2.

[0046] Figure 4 This is a schematic diagram of the lifting device of the present invention from a second viewing angle.

[0047] Figure 5 This is a schematic diagram of the enlarged structure at point B in Figure 4.

[0048] Figure 6 This is a schematic diagram of the enlarged structure at point C in 1.

[0049] Figure 7 This is a schematic structural diagram of the lifting device of the present invention from a third perspective.

[0050] Figure 8 This is a schematic diagram of the enlarged structure at D in Figure 7.

[0051] Figure numerals: 1. base; 2. caster; 3. support frame; 4. crossbeam; 5. leveling assembly; 6. control member; 7. lifting assembly; 11. base body; 12. first slide rail; 13. first connecting bar; 14. rotation hole; 15. L-shaped connecting plate; 16. insertion hole; 31. support frame body; 32. second slide rail; 33. insertion rod; 34. driving block; 35. U-shaped bracket; 36. first slider; 37. first hook; 41. linear slide rail; 42. second connecting bar; 43. guide shaft; 51. first bushing; 52. first push rod; 53. First connecting plate; 54. Second bushing; 55. First bevel gear; 56. Screw rod; 57. First vertical plate; 58. Second bevel gear; 59. First gear; 510. Third bushing; 511. First slide bar; 512. Rack; 513. Second hook; 61. Second slider; 62. Drive box; 63. First motor; 64. First electric telescopic rod; 65. Second U-shaped bracket; 66. Second connecting block; 67. Second motor; 68. Second electric telescopic rod; 69. Clamp; 610. Hook; 71. Winch; 72. Hook. DETAILED DESCRIPTION

[0052] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0053] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0055] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the descriptions with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more schemes or examples.

[0057] The embodiment of the present invention provides a quick-assembly gantry lifting device, which includes two bases 1, such as Figure 1As shown, symmetrically distributed casters 2 are fixed at the bottom of the base 1, and a support frame 3 is rotatably provided at the top. Control parts 6 for controlling the rotation of the support frame 3 are slidably provided on both sides of the base 1. The lifting device also includes a beam 4, which is slidably connected to the support frame 3. The beam 4 is located above the support frame 3. The lifting components 7 are symmetrically distributed on the beam 4, and the support frame 3 is fixed with a leveling component 5 for leveling the beam 4.

[0058] The base 1 includes a base body 11, such as Figure 2 、 Figure 3 As shown, horizontal first slide rails 12 are provided on both sides of the base body 11, and a first connecting bar 13 is fixed on the top of the base body 11. A rotating hole 14 is provided on the first connecting bar 13, and the axis of the rotating hole 14 is perpendicular to the first slide rail 12. L-shaped connecting plates 15 are fixed at both ends of the first connecting bar 13, and a socket 16 is provided on the L-shaped connecting plate 15. The socket 16 is located directly below the rotating hole 14.

[0059] The support frame 3 includes a support frame body 31 which is located in the rotation hole 14 and rotates. Figure 4-7 As shown, vertical second slide rails 32 are provided on both sides of the support frame body 31, and an insertion rod 33 that cooperates with the socket 16 is slidably provided in the second slide rail 32, and a driving block 34 is vertically fixed on the insertion rod 33. A U-shaped bracket 35 is rotatably provided at the end of the support frame body 31 away from the rotating hole 14, and a first slider 36 is fixed on the U-shaped bracket 35. The first slider 36 is slidably connected to the crossbeam 4, and a first hook 37 is fixed on the support frame body 31.

[0060] The crossbeam 4 includes a linear slide rail 41 , the first slider 36 slides in the linear slide rail 41 , and second connecting bars 42 are fixed on both sides of the linear slide rail 41 . The crossbeam 4 also includes two guide shafts 43 , which are fixed near the two ends of the linear slide rail 41 .

[0061] The leveling assembly 5 includes two first sleeves 51 fixed on the support frame body 31, such as Figure 8 As shown, a vertical first push rod 52 is slidably provided on the first sleeve 51, and the first push rod 52 is located below the second connecting bar 42. A first connecting plate 53 is connected between the two first push rods 52. A second sleeve 54 is also fixed on the support frame body 31. A first bevel gear 55 is rotatably provided on the second sleeve 54. A screw rod 56 that is threadedly engaged with the first connecting plate 53 is fixed on the rotating shaft of the first bevel gear 55.

[0062] A first vertical plate 57 is fixed to the support frame body 31, and a second bevel gear 58 meshing with the first bevel gear 55 is rotatably provided on the first vertical plate 57. A first gear 59 is fixed to the rotating shaft of the second bevel gear 58. A third shaft sleeve 510 is fixed to the support frame body 31, and a vertical first slide bar 511 is slidably provided on the third shaft sleeve 510. A rack 512 meshing with the first gear 59 is fixed to the upper end of the first slide bar 511, and a second hook 513 is fixed to the lower end.

[0063] The control member 6 includes an electric second slider 61, which slides in the first slide rail 12, and a drive box 62 is fixed on the second slider 61. A first motor 63 is fixed in the drive box 62, and the output shaft of the first motor 63 passes through the drive box 62. A first electric telescopic rod 64 is vertically fixed to the side plate of the support frame body 31. A second U-shaped bracket 65 is fixed on the output shaft of the first electric telescopic rod 64, and a second connecting block 66 is rotatably provided on the second U-shaped bracket 65. A second motor 67 for driving the second connecting block 66 to rotate is fixed on the second U-shaped bracket 65, and a horizontal second electric telescopic rod 68 is fixed on the second connecting block 66. A splint 69 is fixed on the output shaft of the second electric telescopic rod 68, and a hook 610 is fixed at one end of the splint 69. The corresponding hooks 610 on the two bases 1 are in opposite directions.

[0064] The lifting assembly 7 includes a hoist 71 sliding in the linear slide rail 41 , and a hook 72 is fixed on the rope of the hoist 71 .

[0065] The method for using the lifting device includes the following steps:

[0066] Before assembling the lifting device, Figure 2 As shown, the insertion rod 33 is disengaged from the socket 16, the first push rod 52 is disengaged from the second connecting bar 42, and the first electric telescopic rod 64 is rotated to a horizontal position close to the middle position of the two bases 1. The corresponding hooks 610 on the two bases 1 are hooked together to realize the splicing of the two bases 1. At this time, the combined structure of the base 1, casters 2 and control component 6 can be used as a cart. At this time, the support frame 3 is folded above the cart, so that manpower is saved in the process of carrying the lifting device.

[0067] When assembling the lifting device, the following steps are included:

[0068] S1: fixed hook 72;

[0069] The hook 72 is passed over the guide shaft 43 near the hook 72 and then hooked onto the first hook 37 near the hook 72;

[0070] S2: Assemble the support frame body 31;

[0071] The second electric telescopic rod 68 and the first electric telescopic rod 64 cooperate to control the corresponding hooks 610 on the two bases 1 to separate from each other, and the second slider 61, the first motor 63 and the second electric telescopic rod 68 cooperate to adjust and control the two clamps 69 on the same base 1 to be located on both sides of the corresponding support frame body 31. By starting the first motor 63, the clamps 69 are controlled to rotate and then the support frame body 31 is controlled to rotate vertically. When the support frame body 31 is vertical, under the action of gravity, the insertion rod 33 is automatically inserted into the corresponding socket 16 to limit the support frame body 31.

[0072] S3: Adjust the distance between the two bases 1 according to site needs;

[0073] Adjustment can be made by manually pushing the support frame body 31, or by hooking the hook 610 on one of the control parts 6 on the base 1 to a support body near the base 1. The support body can be a fixed object such as a shelf or a support column. When hooked, the corresponding first electric telescopic rod 64 is horizontal, and the movement of the corresponding base 1 is controlled by extending and retracting the first electric telescopic rod 64.

[0074] S4: Leveling the linear guide rail 41;

[0075] By starting one of the control parts 6 on the base 1, the corresponding hook 610 is hooked on the second hook 513. When hooked, the corresponding first electric telescopic rod 64 is vertical, and the first slide bar 511 is controlled to slide upward by extending the first electric telescopic rod 64, thereby controlling the rack 512 to move upward, thereby driving the first gear 59, the second bevel gear 58, the first bevel gear 55 and the screw rod 56 to rotate, thereby pushing the first connecting plate 53 and the first push rod 52 to move upward, thereby lifting the second connecting bar 42, and then pulling the U-shaped bracket 35 to rotate. When the U-shaped bracket 35 rotates to vertical, the first electric telescopic rod 64 pauses, and the linear slide rail 41 is adjusted to be horizontal.

[0076] S5: Adjust the position of the beam 4;

[0077] Adjust the two lifting assemblies 7 to the same distance from the center of the linear slide 41, start the winch 71 to reel in the rope, and during the reeling process, the winch 71 with a tighter rope pulls the beam 4 to move. The rope output lengths on the two winches 71 are the same. When the ropes on the two winches 71 are tightened, it means that the distance between the two support frame bodies 31 and the center of the linear slide 41 is the same.

[0078] S6: fixed beam 4;

[0079] The first electric telescopic rod 64 is started again to control the first push rod 52 to move upward to press the second connecting bar 42, thereby fixing the crossbeam 4.

[0080] S7: Remove the hook 72.

[0081] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0082] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A quick-assembly gantry lifting device, the lifting device comprising two bases (1), characterized in that: A symmetrically distributed caster (2) is fixed below the base (1), and a support frame (3) is rotatably provided above the base (1). Control members (6) for controlling the rotation of the support frame (3) are slidably provided on both sides of the base (1). The lifting device also includes a crossbeam (4), which is slidably connected to the support frame (3). The crossbeam (4) is located above the support frame (3), and a leveling component (5) for leveling the crossbeam (4) is fixed on the support frame (3); The base (1) comprises a base body (11), a first connecting bar (13) is fixed above the base body (11), and a rotation hole (14) is provided on the first connecting bar (13); The support frame (3) comprises a support frame body (31) which is located and rotated in the rotating hole (14); a U-shaped bracket (35) is rotatably provided at one end of the support frame body (31) away from the rotating hole (14); a first slider (36) is fixed on the U-shaped bracket (35); and the first slider (36) is slidably connected to the crossbeam (4); Horizontal first slide rails (12) are provided on both sides of the base body (11), and the axis of the rotating hole (14) is perpendicular to the first slide rail (12); The control member (6) includes an electric second slider (61), the second slider (61) is located in the first slide rail (12) and slides, a driving box (62) is fixed on the second slider (61), a first motor (63) is fixed in the driving box (62), an output shaft of the first motor (63) passes through the driving box (62), and a first electric telescopic rod (64) is vertically fixed on a side plate of the support frame body (31) away from the side of the support frame body (31), a second U-shaped bracket (65) is fixed on the output shaft of the first electric telescopic rod (64), a second connecting block (66) is rotatably provided on the second U-shaped bracket (65), a second motor (67) for driving the second connecting block (66) to rotate is fixed on the second U-shaped bracket (65), a horizontal second electric telescopic rod (68) is fixed on the second connecting block (66), and a clamping plate (69) is fixed on the output shaft of the second electric telescopic rod (68); A hook (610) is fixed to one end of the clamping plate (69), and the corresponding hooks (610) on the two bases (1) are in opposite directions.

2. A quick-assembly gantry lifting device according to claim 1, characterized in that: The crossbeam (4) includes a linear slide rail (41), and second connecting bars (42) are fixed on both sides of the linear slide rail (41); The leveling assembly (5) includes two first sleeves (51) fixed on the support frame body (31), a vertical first push rod (52) is slidably provided on the first sleeve (51), the first push rod (52) is located below the second connecting bar (42), a first connecting plate (53) is connected between the two first push rods (52), a second sleeve (54) is also fixed on the support frame body (31), a first bevel gear (55) is rotatably provided on the second sleeve (54), and a screw rod (56) threadedly matched with the first connecting plate (53) is fixed on the rotating shaft of the first bevel gear (55).

3. A quick-assembly gantry lifting device according to claim 2, characterized in that: A first vertical plate (57) is fixed on the support frame body (31); a second bevel gear (58) meshing with the first bevel gear (55) is rotatably provided on the first vertical plate (57); a first gear (59) is fixed on the rotating shaft of the second bevel gear (58); a third shaft sleeve (510) is fixed on the support frame body (31); a vertical first slide rod (511) is slidably provided on the third shaft sleeve (510); a rack (512) meshing with the first gear (59) is fixed on the upper end of the first slide rod (511).

4. A quick-assembly gantry lifting device according to claim 3, characterized in that: A second hook (513) is fixed to the lower end of the first sliding rod (511).

5. A quick-assembly gantry lifting device according to claim 4, characterized in that: A lifting assembly (7) symmetrically distributed in sliding relation on the crossbeam (4); The lifting assembly (7) comprises a hoist (71) sliding in the linear slide rail (41), and a hook (72) is fixed on the rope of the hoist (71).

6. A quick-assembly gantry lifting device according to claim 5, characterized in that: An L-shaped connecting plate (15) is fixed to both ends of the first connecting bar (13), and a plug hole (16) is provided on the L-shaped connecting plate (15), and the plug hole (16) is located directly below the rotating hole (14); A vertical second slide rail (32) is provided on both sides of the support frame body (31), an insertion rod (33) cooperating with the insertion hole (16) is slidably provided in the second slide rail (32), and a driving block (34) is vertically fixed on the insertion rod (33).

7. A fast-assembly gantry lifting device according to claim 6, characterized in that: The crossbeam (4) further comprises two guide shafts (43), the guide shafts (43) being fixed at two end positions close to the linear slide rail (41), and a first hook (37) being fixed on the support frame body (31).

8. A method for using a quick-assembly gantry lifting device according to claim 7, characterized in that: The method of use comprises the following steps: Before assembling the lifting device, the insertion rod (33) is disengaged from the insertion hole (16), the first push rod (52) is disengaged from the second connecting bar (42), the first electric telescopic rod (64) is rotated to a horizontal position close to the middle position of the two bases (1), and the corresponding hooks (610) on the two bases (1) are hooked together. At this time, the combined structure of the base (1), the caster (2) and the control member (6) is used as a cart, and the support frame (3) is folded above the cart; When assembling the lifting device, the following steps are included: S1: fixed hook (72); The hook (72) is passed around the guide shaft (43) near the hook (72) and then hooked onto the first hook (37) near the hook (72); S2: Assembling the support frame body (31); By controlling the corresponding hooks (610) on the two bases (1) to separate from each other, by adjusting the two clamping plates (69) on the same base (1) to be located on both sides of the corresponding support frame body (31), and by starting the first motor (63), the support frame body (31) is controlled to rotate vertically. When the support frame body (31) is vertical, the insertion rod (33) is automatically inserted into the corresponding insertion hole (16) under the action of gravity; S3: Adjust the distance between the two bases (1) according to site needs; By hooking the hook (610) on one of the control members (6) on the base (1) on a support body near the base (1), the corresponding first electric telescopic rod (64) is horizontal when hooked, and the corresponding base (1) is controlled to move by extending and retracting the first electric telescopic rod (64); S4: Leveling linear slide rail (41); By activating one of the control members (6) on the base (1), the corresponding hook (610) is hooked on the second hook (513), and when hooked, the corresponding first electric telescopic rod (64) is vertical, and the U-shaped bracket (35) is controlled to rotate by extending the first electric telescopic rod (64). When the U-shaped bracket (35) rotates to be vertical, the first electric telescopic rod (64) is paused, and at this time, the linear slide rail (41) is adjusted to be horizontal; S5: Adjust the position of the crossbeam (4); Adjust the two lifting assemblies (7) to the same distance from the center of the linear slide rail (41), start the hoist (71) and control the ropes on the two hoists (71) to be tightened; S6: fixed beam (4); The first electric telescopic rod (64) is activated again to control the first push rod (52) to move upward to compress the second connecting strip (42), thereby fixing the crossbeam (4); S7: Remove the hook (72).

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