A hoisting device for bridge construction

Abstract

The utility model relates to bridge construction technical field discloses a hoisting device for bridge construction, including crossbeam, sling, the lifting appliance of self -locking function, hoisting column and disengaging component, the ear of the hook for connecting external crane is symmetrically fixed in the top of crossbeam, and the both ends fixed connection of crossbeam have the ear no.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a hoisting device for bridge construction. Background Technology

[0002] In bridge construction, the hoisting of precast components requires specialized hoisting equipment to lift, transport, and install the components.

[0003] In the prior art, for example, the utility model patent with authorization announcement number CN221274980U discloses a bridge prefabricated component hoisting device. Its core structure includes a hoisting column, a hoisting plate, a chain, and an extension rod. The connection is achieved by the locking groove of the hoisting plate cooperating with the locking part of the hoisting column, and the hoisting is completed by the chain cooperating with the crane.

[0004] However, this existing technology has many shortcomings in practical applications: First, the snap-fit ​​structure is a simple surface contact fit without a self-locking function. During hoisting, it is affected by the weight of the component and wind force, which can cause the component to sway and tilt, posing a safety hazard. Second, the hoisted component is often in a high position. The process of detaching the hoisting device requires manual pulling of the steel wire rope, which poses a risk of falling from a height. Moreover, the operation is cumbersome, laborious, and inefficient. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a hoisting device for bridge construction, which has a self-locking function, can improve the stability and safety of hoisting, and can achieve the separation of the hoisting device from the hoisting column without manual high-altitude operation, making it convenient and efficient to operate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hoisting device for bridge construction, comprising a crossbeam, a hoisting rope, a self-locking lifting device, a hoisting column, and a release assembly; symmetrical lugs for connecting to an external crane are fixedly mounted on the upper part of the crossbeam, and a first hoisting lug is fixedly connected to both ends of the crossbeam, the first hoisting lug being fixedly connected to one end of the hoisting rope, and the other end of the hoisting rope being fixedly connected to the lifting device; the hoisting column is used to be fixedly connected to the component and self-lockingly engaged with the lifting device, and the release assembly is installed below the crossbeam for driving the lifting device to detach from the hoisting column.

[0007] As a further description of the above technical solution: the release assembly includes a hydraulic cylinder, a fixed base, and a pulley; the hydraulic cylinder is installed below the crossbeam, the output end of the hydraulic cylinder is fixedly connected to the fixed base, the pulley is rotatably connected to the fixed base through a rotating shaft, and the wheel surface of the pulley abuts against the hoisting rope; when the hydraulic cylinder extends, it pushes the hoisting rope to shift laterally through the pulley, thereby adjusting the distance between the two hoisting ropes.

[0008] As a further description of the above technical solution: the lifting device includes a frame, two lifting lugs, a locking tongue block, a locking pin, a tension spring, and a return spring; the two lifting lugs are symmetrically fixed on the upper part of the frame for fixed connection with the lifting rope; a through mounting groove is provided in the middle of the frame, and a receiving groove is provided on the inner wall of the mounting groove; the locking tongue block is slidably arranged up and down along the central axis of the receiving groove, and trapezoidal wedges are symmetrically slidably connected on both sides of the locking tongue block, with the side of the trapezoidal wedge away from the locking tongue block abutting against the lower end of the locking pin; the middle part of the locking pin is rotatably connected to the frame through a pin shaft; the return spring is vertically installed between the lower part of the locking tongue block and the bottom wall of the receiving groove, and the tension spring is horizontally installed between the upper part of the locking pin and the side wall of the receiving groove.

[0009] As a further description of the above technical solution: the hoisting column includes a fixed column, a limiting column, and a locking groove; one end of the fixed column is used to be fixedly connected to the component, and the other end is coaxially fixedly connected to the limiting column; the locking groove is opened on the circumferential surface of the fixed column, and the locking groove matches the locking pin of the lifting device, so as to realize the self-locking fixation of the lifting device and the hoisting column.

[0010] As a further description of the above technical solution: the diameter of the limiting post is greater than the diameter of the fixing post, and the diameter of the limiting post is smaller than the inner diameter above the lifting device mounting groove.

[0011] As a further description of the above technical solution: the upper end of the latch block has a semi-cylindrical structure, and the trapezoidal wedge block has an inclined surface on the side near the latch block that matches the lower end of the latch block. When the latch block slides down, the inclined surface pushes the trapezoidal wedge block to move laterally along the receiving groove.

[0012] As a further description of the above technical solution: when the reset spring is in its natural state, the upper end of the locking tongue block protrudes out of the receiving groove and is located in the mounting groove; when the tension spring is in its natural state, the upper end of the locking pin retracts into the receiving groove, which facilitates the insertion of the lifting column into the mounting groove.

[0013] As a further description of the above technical solution: the end of the locking pin extending into the mounting groove is provided with an inclined surface that matches the locking groove, and the inclined surface is consistent with the downward inclination direction of the locking groove.

[0014] As a further description of the above technical solution: the upper inner diameter of the mounting groove of the lifting device is larger than the lower inner diameter; the upper inner diameter of the mounting groove is larger than the diameter of the limiting column, and the lower inner diameter of the mounting groove is clearance-fitted with the diameter of the fixing column to ensure accurate positioning and insertion of the lifting column.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the linkage design of the internal locking tongue block, trapezoidal wedge block, locking pin, tension spring, and return spring of the lifting device, combined with the locking groove structure of the lifting column, realizes automatic self-locking after the lifting column is inserted into the lifting device. During the lifting process, the weight of the component will continuously press the locking tongue block, so that the locking pin and the locking groove are tightly fitted. Even if it is affected by external forces such as wind and shaking, it can effectively prevent the component from tilting or falling off, eliminate safety hazards, and improve the stability and safety of the lifting operation.

[0017] 2. In this utility model, the detachment assembly consisting of a hydraulic cylinder, a fixed seat, and pulleys enables the automated detachment of the lifting device from the lifting column. There is no need for manual high-altitude pulling of the wire rope. The detachment rope can be shifted laterally and the spacing adjusted simply by controlling the extension and retraction of the hydraulic cylinder. This eliminates the risk of falling from heights, simplifies the detachment process, reduces manual intervention steps, and further improves the efficiency of the overall lifting operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a side view of the present invention;

[0020] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the lifting device.

[0022] Figure 5 A schematic diagram of removing the frame from the lifting device;

[0023] Figure 6 This is a structural schematic diagram of the hoisting column;

[0024] Figure 7 This is a cross-sectional schematic diagram of the lifting device;

[0025] Figure 8 A cross-sectional schematic diagram of the locking pin being inserted into the locking groove;

[0026] Figure 9 A side view showing the lifting column positioned above the mounting slot as the lifting device is lowered.

[0027] Figure 10 This is a frontal view of the lifting device detaching from the lifting column when the hydraulic cylinder extends.

[0028] Legend:

[0029] 1. Crossbeam; 2. Lifting lug one; 3. Lifting rope; 4. Lifting tool; 401. Frame; 402. Lifting lug two; 403. Mounting slot; 404. Receiving slot; 405. Locking tongue block; 406. Locking pin; 407. Pin shaft; 408. Trapezoidal wedge block; 409. Tension spring; 410. Return spring; 5. Hanging lug; 6. Lifting column; 601. Fixed column; 602. Limiting column; 603. Locking slot; 7. Disengagement assembly; 701. Hydraulic cylinder; 702. Fixed base; 703. Pulley. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example

[0032] Reference Figure 1-10 This utility model provides an embodiment of a bridge construction hoisting device, comprising a crossbeam 1, a hoisting rope 3, a self-locking lifting device 4, a hoisting column 6, and a release assembly 7. Symmetrically fixed on the top of the crossbeam 1 are lugs 5 for connecting to an external crane. Lifting lugs 2 are fixedly connected to both ends of the crossbeam 1, with one end of the lifting rope 3 fixedly connected to the other end of the rope 3 and the other end of the rope 3 fixedly connected to the lifting device 4. The hoisting column 6 is used to fix itself to the component and self-locks with the lifting device 4. The release assembly 7 is installed below the crossbeam 1 to drive the lifting device 4 to detach from the hoisting column 6. The length of the crossbeam 1 is adapted to the length of the component to be hoisted. The device is connected to an external crane via the lugs 5 on the top of the crossbeam 1. The lugs 2 at both ends of the crossbeam 1 connect the lifting rope 3 to the self-locking lifting device 4. One end of the hoisting column 6 is fixed to the component. The other end serves as a connecting end, cooperating with the lifting device 4; the crane lowers the lifting device 4, and the lifting column 6 is inserted into the installation slot 403 of the lifting device 4. Through the locking structure inside the lifting device 4 and the locking slot 603 of the lifting column 6, a self-locking mechanism is formed, achieving a stable connection between the component and the device; the crane lifts the crossbeam 1, and through the lifting rope 3 and the lifting device 4, the lifting column 6 and the component are driven to rise synchronously and transported to the designated position; after the component reaches the target position, the lifting device 4 is lowered, driving the lifting device 4 to release the self-locking mechanism from the lifting column 6, and the release component 7 is activated to separate the lifting device 4 from the lifting column 6, completing the operation; through the self-locking cooperation between the lifting device 4 and the lifting column 6, the component is prevented from swaying or tilting due to its own weight, wind force, or other external forces, reducing safety hazards; at the same time, the integrated release component 7 replaces the manual pulling of the wire rope release method, eliminating the risk of falling from height, simplifying the operation process, and improving lifting efficiency.

[0033] like Figure 3As shown, the detachment assembly 7 includes a hydraulic cylinder 701, a fixed base 702, and a pulley 703. The hydraulic cylinder 701 is installed below the crossbeam 1, and its output end is fixedly connected to the fixed base 702. The pulley 703 is rotatably connected to the fixed base 702 via a rotating shaft, and the wheel surface of the pulley 703 abuts against the lifting rope 3. When the hydraulic cylinder 701 extends, it pushes the lifting rope 3 laterally through the pulley 703, thereby adjusting the distance between the two lifting ropes 3. In the initial state, the hydraulic cylinder 701 is in a retracted state, the pulley 703 and the lifting rope 3 maintain slight contact, and the distance between the two lifting ropes 3 is adapted to the lifting column 6. After the assembly is fixed, the crane slowly lowers the lifting device 4, the tension of the lifting rope 3 decreases, and the self-adjustment of the lifting device 4 and the lifting column 6... The lock is released; the hydraulic cylinder 701 extends, and its output end pushes the fixed seat 702 and the pulley 703 rotatably connected to it to move laterally; the pulley 703 wheel surface is in close contact with the lifting rope 3, and pushes one of the lifting ropes 3 through lateral thrust, increasing the distance between the two lifting ropes 3, thereby causing the lifting device 4 to be displaced from the lifting column 6; mechanical drive replaces manual operation, realizing automatic control of the disengagement process and avoiding the risks of personnel working at height; the pulley 703 is rotatably connected through a rotating shaft, and has rolling friction with the lifting rope 3, reducing wear on the lifting rope and extending the service life of the device; the hydraulic cylinder 701 has a stable thrust, which can accurately control the offset of the lifting rope 3, ensuring that the lifting device 4 is disengaged smoothly and avoiding collision or damage to the components.

[0034] like Figure 4 and Figure 5As shown, the lifting device 4 includes a frame 401, a second lifting lug 402, a locking tongue block 405, a locking pin 406, a tension spring 409, and a return spring 410; the second lifting lug 402 is symmetrically fixedly mounted on the upper part of the frame 401 for fixed connection with the lifting rope 3; a through mounting groove 403 is provided in the middle of the frame 401, and a receiving groove 404 is provided on the inner wall of the mounting groove 403; the locking tongue block 405 is slidably arranged up and down along the central axis of the receiving groove 404, and trapezoidal wedges 408 are symmetrically slidably connected on both sides of the locking tongue block 405, with the side of the trapezoidal wedge 408 away from the locking tongue block 405 abutting against the lower end of the locking pin 406; the lock The middle part of the stop pin 406 is rotatably connected to the frame 401 via the pin 407; the return spring 410 is vertically installed between the lower part of the locking tongue block 405 and the bottom wall of the receiving groove 404, and the tension spring 409 is horizontally installed between the upper part of the locking stop pin 406 and the side wall of the receiving groove 404; during operation, the lifting column 6 is inserted into the mounting groove 403, the fixing column 601 contacts the upper end of the locking tongue block 405 and applies downward pressure; the locking tongue block 405 slides downward along the central axis of the receiving groove 404, compressing the return spring 410; the lower end of the locking tongue block 405 pushes the trapezoidal wedges 408 on both sides horizontally along the receiving groove 404 via the inclined surface. The component moves outward; the trapezoidal wedge 408 pushes against the lower end of the locking pin 406, causing the locking pin 406 to rotate around the central pin 407, and the upper part extends out of the receiving groove 404 and enters the installation groove 403; when the fixing column 601 reaches the bottom of the installation groove 403, the locking pin 406 is engaged in the locking groove 603 of the hoisting column, completing self-locking (the component's own weight continuously presses against the locking tongue block 405, making the locking pin 406 fit tightly against the locking groove 603); after the component is fixed, the crane lowers the lifting device 4, the tension of the lifting rope 3 decreases, and the pressure of the fixing column 601 on the locking tongue block 405 disappears; the return spring 410 rebounds, pushing the locking tongue block 405 along the receiving groove. 404 moves upward; the trapezoidal wedge block 408 loses the pressure of the locking tongue block 405 and returns to the center; the tension spring 409 contracts, pulling the locking pin 406 to rotate in the opposite direction around the pin shaft 407, and the upper part retracts back into the receiving groove 404, releasing the self-locking state; the mechanical transmission structure of the locking tongue block 405, trapezoidal wedge block 408, and locking pin 406 is stable, and the tension spring 409 and the return spring 410 provide continuous force to ensure reliable self-locking state and strong resistance to external interference (such as wind and swaying); realizing the automated logic of "self-locking upon hoisting and reset upon unloading", without the need for additional locking and unlocking operations, improving work efficiency.

[0035] like Figure 7 and Figure 8As shown, the upper end of the locking tongue block 405 has a semi-cylindrical structure, which reduces the contact area and frictional resistance with the fixed column 601, making the insertion of the lifting column 6 smoother and avoiding jamming during insertion, thus improving the smoothness of operation. The trapezoidal wedge block 408 has an inclined surface that matches the lower end of the locking tongue block 405 on the side near the locking tongue block 405. When the locking tongue block 405 slides downward, the inclined surface pushes the trapezoidal wedge block 408 to move laterally along the receiving groove 404. When the locking tongue block 405 slides downward under the pressure of the lifting column 6, the wedge action of the inclined surface converts the vertical downward movement of the locking tongue block 405 into the lateral outward movement of the trapezoidal wedge block 408, thereby driving the locking pin 406 to rotate.

[0036] When the return spring 410 is in its natural state, the upper end of the locking tongue block 405 protrudes from the receiving groove 404 and is located in the mounting groove 403, so that the lifting column 6 can directly contact the locking tongue block 405 when inserted, triggering the self-locking process; when the tension spring 409 is in its natural state, the upper end of the locking pin 406 retracts into the receiving groove 404, making it easier for the lifting column 6 to be inserted into the mounting groove 403, and preventing the locking pin 406 from protruding and obstructing the insertion of the lifting column 6 into the mounting groove 403; without the need for manual adjustment of the initial position of the locking tongue block 405 or the locking pin 406, the lifting column 6 can be directly inserted and trigger the self-locking, simplifying the lifting preparation process.

[0037] The locking pin 406 extends into the mounting groove 403 at one end and has an inclined surface that matches the locking groove 603. The inclined surface is in the same downward inclination direction as the locking groove 603, which facilitates the release of the self-locking state.

[0038] like Figure 6 As shown, the lifting column 6 includes a fixed column 601, a limiting column 602, and a locking groove 603. One end of the fixed column 601 is used for fixed connection with the component, and the other end is coaxially fixedly connected with the limiting column 602, forming a stepped structure. During lifting, the limiting column 602 first enters the mounting groove 403 of the lifting device 4, which serves as a guide. The locking groove 603 is opened on the circumferential surface of the fixed column 601, and the locking groove 603 matches the locking pin 406 of the lifting device 4. When the fixed column 601 reaches the bottom of the mounting groove 403, the locking pin 406 engages with the locking groove 603, realizing the self-locking fixation of the lifting column 6 and the lifting device 4. During the transfer process, the fixed column 601 transmits the weight of the component, and the cooperation between the locking groove 603 and the locking pin 406 prevents the lifting column 6 from rotating, thereby preventing the component from tilting.

[0039] The diameter of the limiting post 602 is larger than that of the fixed post 601, forming a stepped surface. When the lifting post 6 is inserted into the mounting groove 403, the stepped surface contacts the shoulder of the mounting groove 403, which can prevent the component from moving axially. In addition, the diameter of the limiting post 602 is smaller than the inner diameter above the mounting groove 403 of the lifting device 4, ensuring that the limiting post 602 can smoothly enter the mounting groove 403, playing an initial guiding role and preventing the lifting post 6 from deviating when inserted.

[0040] The upper inner diameter of the mounting groove 403 of the lifting device 4 is larger than the lower inner diameter, forming a gradient structure that is wider at the top and narrower at the bottom. The upper inner diameter of the mounting groove 403 is larger than the diameter of the limiting post 602, ensuring that the limiting post can quickly enter the mounting groove and play a coarse guiding role. The lower inner diameter of the mounting groove 403 is in clearance fit with the diameter of the fixing post 601. When the fixing post 601 moves down to the lower part of the mounting groove 403, precise positioning is achieved through clearance fit, ensuring that the locking groove 603 is aligned with the locking pin 406.

[0041] Working principle: The crane is started to lower the lifting device 4, allowing the limiting column 602 to smoothly enter the installation slot 403. Then, the lifting device 4 is slowly raised. As the lifting device 4 is raised, the fixing column 601 contacts the semi-cylindrical structure at the upper end of the locking tongue block 405 (e.g., Figure 2 (As shown in the diagram), the fixed post 601 applies downward pressure to the latch block 405, pushing the latch block 405 to slide downward along the central axis of the receiving groove 404, while simultaneously compressing the return spring 410; as the latch block 405 slides downward, its lower end's inclined surface pushes the trapezoidal wedge block 408 to move away from the latch block 405 along the receiving groove 404; when the trapezoidal wedge block 408 moves laterally, it pushes against the lower end of the locking pin 406, causing the locking pin 406 to rotate around the central pin 407, and the upper part of the locking pin 406 enters the mounting groove 403; the fixed post 601 reaches... When installing the bottom of the groove 403, the locking pin 406 rotates to its limit position. At this time, the locking pin 406 is engaged in the locking groove 603. As the lifting device continues to be lifted, the weight of the component is continuously transmitted to the locking tongue block 405 through the fixed column 601, which continuously exerts downward pressure on the locking tongue block 405, making the locking pin 406 fit tightly with the locking groove 603. During the transportation process, the self-locking structure continues to play a role. Even if affected by external forces such as wind and shaking, the locking pin 406 is still pressed tightly in the locking groove 603 by the weight of the component, ensuring that the component remains stable and there is no risk of tilting or falling off.

[0042] After the component is transferred to the designated position and fixed, the lifting device 4 is slowly lowered to a certain height. The tension of the lifting rope 3 decreases, and the squeezing force of the fixing column 601 on the locking tongue block 405 disappears. The return spring 410 rebounds and pushes the locking tongue block 405 upward. After the trapezoidal wedge block 408 loses its squeezing force, it returns to the center. The tension spring 409 contracts and pulls the locking pin 406 back to its original position. The upper part of the locking pin 406 smoothly exits from the locking groove 603. The lifting device 4 continues to descend. When the inner diameter of the fixing column 601 is coaxial with the inner diameter of the mounting groove 403 (e.g., ...), the lifting device 4 continues to descend. Figure 9 (As shown in the diagram), control the hydraulic cylinder 701 to extend, pushing the fixed seat 702 and pulley 703 to move laterally (as shown in the diagram). Figure 10(As shown in the diagram); the pulley 703 is in close contact with the lifting rope 3. During the movement, a lateral thrust is applied to the lifting rope 3, increasing the distance between the two lifting ropes 3. At this time, the right lifting device 4 is disengaged from the lifting column 6. The horizontal position of the right lifting column 6 is at the same height as the bottom of the installation groove 403. At this time, the crane is adjusted to move the crossbeam 1 to the left, and the left lifting device 4 is disengaged. Then the lifting device 4 is lifted, and the device is completely separated from the component, completing the entire lifting operation.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hoisting device for bridge construction, characterized in that: The system includes a crossbeam (1), a lifting rope (3), a lifting device (4) with a self-locking function, a lifting column (6), and a release assembly (7). The crossbeam (1) is symmetrically fixed with lugs (5) for connecting to an external crane. The two ends of the crossbeam (1) are fixedly connected with a first lifting lug (2). The first lifting lug (2) is fixedly connected to one end of the lifting rope (3), and the other end of the lifting rope (3) is fixedly connected to the lifting device (4). The lifting column (6) is used to fix the connection with the component and self-lock with the lifting device (4). The release assembly (7) is installed below the crossbeam (1) and is used to drive the lifting device (4) to detach from the lifting column (6).

2. The hoisting device for bridge construction according to claim 1, characterized in that: The detachment assembly (7) includes a hydraulic cylinder (701), a fixed base (702), and a pulley (703). The hydraulic cylinder (701) is installed below the crossbeam (1). The output end of the hydraulic cylinder (701) is fixedly connected to the fixed base (702). The pulley (703) is rotatably connected to the fixed base (702) through a rotating shaft, and the wheel surface of the pulley (703) abuts against the hoisting rope (3). When the hydraulic cylinder (701) extends, it pushes the hoisting rope (3) to shift laterally through the pulley (703), thereby adjusting the distance between the two hoisting ropes (3).

3. The hoisting device for bridge construction according to claim 1, characterized in that: The lifting device (4) includes a frame (401), two lifting lugs (402), a locking tongue block (405), a locking pin (406), a tension spring (409), and a return spring (410); the two lifting lugs (402) are symmetrically fixed on the top of the frame (401) for fixed connection with the lifting rope (3); a through mounting groove (403) is provided in the middle of the frame (401), and a receiving groove (404) is provided on the inner wall of the mounting groove (403); the locking tongue block (405) is slidably arranged up and down along the central axis of the receiving groove (404). The locking tongue block (405) is symmetrically slidably connected to trapezoidal wedge blocks (408) on both sides. The side of the trapezoidal wedge block (408) away from the locking tongue block (405) abuts against the lower end of the locking pin (406). The middle part of the locking pin (406) is rotatably connected to the frame (401) through a pin shaft (407). The reset spring (410) is vertically installed between the lower part of the locking tongue block (405) and the bottom wall of the receiving groove (404). The tension spring (409) is horizontally installed between the upper part of the locking pin (406) and the side wall of the receiving groove (404).

4. The hoisting device for bridge construction according to claim 1, characterized in that: The hoisting column (6) includes a fixed column (601), a limiting column (602), and a locking groove (603); one end of the fixed column (601) is used to be fixedly connected to the component, and the other end is coaxially fixedly connected to the limiting column (602). The locking groove (603) is opened on the circumferential surface of the fixed column (601), and the locking groove (603) matches the locking pin (406) of the lifting device (4) to realize the self-locking fixation of the lifting device (4) and the hoisting column (6).

5. A hoisting device for bridge construction according to claim 4, characterized in that: The diameter of the limiting post (602) is greater than the diameter of the fixing post (601), and the diameter of the limiting post (602) is less than the inner diameter above the mounting groove (403) of the lifting device (4).

6. A hoisting device for bridge construction according to claim 3, characterized in that: The upper end of the latch block (405) has a semi-cylindrical structure. The trapezoidal wedge block (408) has an inclined surface on the side near the latch block (405) that matches the lower end of the latch block (405). When the latch block (405) slides down, the inclined surface pushes the trapezoidal wedge block (408) to move laterally along the receiving groove (404).

7. A hoisting device for bridge construction according to claim 3, characterized in that: When the reset spring (410) is in its natural state, the upper end of the locking tongue block (405) protrudes out of the receiving groove (404) and is located in the mounting groove (403); when the tension spring (409) is in its natural state, the upper end of the locking pin (406) retracts into the receiving groove (404), making it easier for the lifting column (6) to be inserted into the mounting groove (403).

8. A hoisting device for bridge construction according to claim 3, characterized in that: The locking pin (406) extends into the mounting groove (403) at one end and has an inclined surface that matches the locking groove (603), and the inclined surface is consistent with the downward inclination direction of the locking groove (603).

9. A hoisting device for bridge construction according to claim 1, characterized in that: The upper inner diameter of the mounting groove (403) of the lifting device (4) is greater than the lower inner diameter; the upper inner diameter of the mounting groove (403) is greater than the diameter of the limiting column (602); the lower inner diameter of the mounting groove (403) is in clearance fit with the diameter of the fixing column (601) to ensure that the lifting column (6) is accurately positioned and inserted.

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