Hoisting mechanism of hook bridge crane

Abstract

The utility model relates to the technical field of hoisting equipment, and discloses a hoisting mechanism of a hook bridge crane, which comprises a driving mechanism, a fixed wheel set, a traction mechanism and a pulley set, and is characterized in that the driving mechanism is arranged on one side of the fixed wheel set to provide power for the traction mechanism; the fixed wheel set comprises a first fixed wheel and a second fixed wheel, and the second fixed wheel is rotatably arranged below the first fixed wheel; the pulley block comprises a first movable pulley and a second movable pulley. According to the hoisting mechanism of the hook bridge crane, the design that multiple pulley blocks are matched is adopted, a fixed wheel set comprises a first fixed wheel and a second fixed wheel below the fixed wheel set, each pulley block comprises a first movable pulley and a second movable pulley located below the first fixed wheel, and a traction steel cable sequentially winds around the multiple pulley blocks and then is connected with a driving mechanism; according to the multi-pulley cooperative rope winding mode, the overall bearing capacity is improved through the labor-saving principle of the movable pulley, and meanwhile the steel cable is stressed more evenly through multi-fulcrum distribution.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, specifically to a lifting mechanism for a hook bridge crane. Background Technology

[0002] In the traditional design of hook bridge cranes, the performance of the hoisting mechanism has always been limited by the limitations of the structural design. The contradiction between its load-bearing capacity and operational stability has long existed. Existing technologies mostly adopt a single-moving pulley or a simple double pulley block combined with a single fixed wheel structure. Although this design can achieve the basic hoisting function, it has exposed many problems in practical applications.

[0003] In terms of load-bearing capacity, the existing structure has limited labor-saving effect, mainly relying on the mechanical principle of single-acting pulleys to distribute the load, resulting in a low overall load-bearing capacity. When it is necessary to lift heavier goods, the load-bearing capacity can only be enhanced by increasing the diameter of the steel cable. This not only increases the weight of the equipment itself, but also increases the energy consumption of the power system, forming a vicious cycle of heavy load and low efficiency. At the same time, the single-support rope winding method concentrates the force on the steel cable at a few contact points, which can easily cause local overload. Long-term use may lead to the degradation of the steel cable performance and create safety hazards.

[0004] The existing hook bridge cranes have limited their operating efficiency and safety, especially in heavy-load or high-precision operation scenarios. Existing technologies are no longer able to meet actual needs, and structural innovation is urgently needed to break through the above bottlenecks. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a lifting mechanism for a hook bridge crane, which solves the problem that the existing structure has limited labor-saving effect and mainly relies on the mechanical principle of single-acting pulley to distribute the load, resulting in a low overall load capacity.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a lifting mechanism for a hook-type bridge crane, comprising a drive mechanism, a fixed wheel block, a traction mechanism, and a pulley block, wherein:

[0009] The drive mechanism is located on one side of the fixed wheel assembly to provide power to the traction mechanism;

[0010] The fixed wheel assembly includes a first fixed wheel and a second fixed wheel, wherein the second fixed wheel is rotatably disposed below the first fixed wheel;

[0011] The pulley assembly includes a first movable pulley and a second movable pulley, with the second movable pulley positioned below the first fixed pulley;

[0012] The traction mechanism includes a positioning ring and a traction cable. The positioning ring is sleeved on the outer wall of the second fixed wheel. One end of the traction cable is fixedly connected to the outer surface of the positioning ring. The traction cable passes through the first movable pulley, the first fixed wheel and the second movable pulley in sequence and is then connected to the drive mechanism.

[0013] Optionally, a support mechanism is also included, which includes a support beam, guide grooves, racks, and slides. Two guide grooves are respectively opened on both sides of the outer surface of the support beam, two racks are respectively fixedly installed on the inner bottom walls of the two guide grooves, and the slide is opened in the middle of the bottom of the support beam.

[0014] Optionally, a guide mechanism is provided below the support mechanism. The guide mechanism includes a support frame, a motor, a drive wheel, a gear, and a slider. Multiple motors are fixedly installed on one side of the outer surface of the support frame. Multiple drive wheels are rotatably installed on both sides of the inner wall of the support frame. One side of a portion of the drive wheels is connected to the side of the motor output end that passes through the support frame via a key drive. The gear is fixedly installed on the drive wheel. The slider is fixedly installed on the inner bottom wall of the support frame and is slidably connected to the inner wall of the slide groove.

[0015] Optionally, the drive mechanism includes a mounting base, a take-up roller, and a heavy-duty motor. The mounting base is fixedly installed on the bottom of the support frame, the take-up roller is rotatably connected to the inner side wall of the mounting base, the heavy-duty motor is fixedly installed on one side of the mounting base, and the output end of the heavy-duty motor is connected to the outer wall of the take-up roller via a key drive.

[0016] Optionally, the fixed wheel assembly further includes a fixed seat and a first protective shell. The fixed seat is fixedly installed on the bottom of the support frame, and the first protective shell is fixedly installed on the bottom of the fixed seat. The inner wall of the first protective shell is rotatably connected to the first fixed wheel and the second fixed wheel, respectively.

[0017] Optionally, the pulley block further includes a second protective shell and a hook, wherein the second protective shell is sleeved on the outside of the first and second movable pulleys, and the hook is fixedly installed on the bottom of the second protective shell.

[0018] (III) Beneficial Effects

[0019] This utility model provides a hoisting mechanism for a hook-type bridge crane, which has the following advantages:

[0020] The lifting mechanism of this hook bridge crane adopts a multi-pulley block design. The fixed pulley block includes a first fixed pulley and a second fixed pulley below it, while the pulley block includes a first movable pulley and a second movable pulley located below the first fixed pulley. The traction cable is connected to the drive mechanism after passing through multiple pulley blocks in sequence. This multi-pulley cooperative rope winding method improves the overall load-bearing capacity through the labor-saving principle of the movable pulley. At the same time, the distribution of multiple support points makes the cable more evenly stressed, reduces the load on a single section of cable, lowers the risk of breakage, improves the stability of the lifting process, and reduces swaying. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall installation structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the traction mechanism structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the guiding mechanism structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the traction mechanism structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the fixed wheel assembly structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the pulley block structure of this utility model.

[0027] In the diagram: 1. Support mechanism; 101. Support beam; 102. Guide groove; 103. Rack; 104. Slide groove; 2. Guiding mechanism; 201. Support frame; 202. Motor; 203. Drive wheel; 204. Gear; 205. Slider; 3. Drive mechanism; 301. Mounting base; 302. Take-up roller; 303. Heavy-duty motor; 4. Fixed wheel assembly; 401. Fixed base; 402. First protective shell; 403. First fixed wheel; 404. Second fixed wheel; 5. Traction mechanism; 501. Positioning ring; 502. Traction cable; 6. Pulley assembly; 601. Second protective shell; 602. First movable pulley; 603. Second movable pulley; 604. Hook. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figures 1 to 6This utility model provides a technical solution: a lifting mechanism for a 604 hook bridge crane, comprising a drive mechanism 3, a fixed wheel block 4, a traction mechanism 5, and a pulley block 6, wherein:

[0030] The drive mechanism 3 is located on one side of the fixed wheel set 4 to provide power to the traction mechanism 5;

[0031] The fixed wheel assembly 4 includes a first fixed wheel 403 and a second fixed wheel 404, with the second fixed wheel 404 rotatably disposed below the first fixed wheel 403;

[0032] The pulley block 6 includes a first movable pulley 602 and a second movable pulley 603, with the second movable pulley 603 located below the first fixed pulley 403;

[0033] The traction mechanism 5 includes a positioning ring 501 and a traction cable 502. The positioning ring 501 is sleeved on the outer wall of the second fixed wheel 404. One end of the traction cable 502 is fixedly connected to the outer surface of the positioning ring 501. The traction cable 502 passes through the first movable pulley 602, the first fixed wheel 403 and the second movable pulley 603 in sequence, and then connects to the drive mechanism 3.

[0034] In this embodiment, the first fixed wheel 403 changes the direction of force on the traction cable 502, converting the horizontal tension into a vertical lifting force. Its position design, in conjunction with the movable pulley, forms a force-saving transmission path. The second fixed wheel 404 is located below the first fixed wheel 403 and cooperates with the positioning ring 501 to fix the starting end of the cable. The double fixed wheel layout disperses the directional stress of the cable, avoiding local overload of a single fixed wheel. The first movable pulley 602 and the second movable pulley 603 cooperate to form a multi-rate force-saving structure. The load-bearing characteristics of the movable pulley reduce the load on the drive mechanism 3, increasing the maximum load-bearing capacity of the lifting mechanism. The second movable pulley 603 is located below the first fixed pulley 403, forming a symmetrical layout with the first movable pulley 602. This ensures that the steel cable is subjected to balanced forces during lifting, reducing the swaying of the hook 604. The positioning ring 501 is sleeved on the outer wall of the second fixed pulley 404, providing a fixed support point for the traction steel cable 502. Its ring structure ensures that the starting end of the steel cable is subjected to uniform forces, preventing it from falling off. The traction steel cable 502, as the force transmission carrier, forms a multi-support force structure by sequentially passing through the first movable pulley 602, the first fixed pulley 403, and the second movable pulley 603. This disperses the load of a single section of the steel cable and improves the overall load-bearing capacity.

[0035] In the above embodiments, as a preferred option, a support mechanism 1 is further included. The support mechanism 1 includes a support beam 101, guide grooves 102, racks 103, and slide grooves 104. The two guide grooves 102 are respectively opened on both sides of the outer surface of the support beam 101, and the two racks 103 are respectively fixedly installed on the inner bottom walls of the two guide grooves 102. The slide groove 104 is opened in the middle of the bottom of the support beam 101. The support beam 101 serves as the basic load-bearing component of the entire lifting mechanism, bearing the weight of all the lower components such as the guide mechanism 2 and the drive mechanism 3, and providing stability for horizontal movement. A fixed support frame and guide groove 102 limit the movement trajectory of drive wheel 203 and gear 204 to prevent the guide mechanism 2 from shifting laterally during movement. At the same time, it provides installation space for rack 103. Rack 103 meshes with gear 204 of guide mechanism 2. The transmission of gear 204 and rack 103 achieves precise horizontal displacement, ensuring that the lifting mechanism moves stably along support beam 101. Slide groove 104 cooperates with slider 205 of guide mechanism 2 to form sliding guide constraint, further limiting the vertical sway of guide mechanism 2 and improving the stability of horizontal movement.

[0036] In the above embodiment, as a preferred solution, a guide mechanism 2 is provided below the support mechanism 1. The guide mechanism 2 includes a support frame 201, a motor 202, a drive wheel 203, a gear 204, and a slider 205. Multiple motors 202 are fixedly mounted on one side of the outer surface of the support frame 201. Multiple drive wheels 203 are rotatably mounted on both sides of the inner wall of the support frame 201. One side of a portion of the drive wheels 203 is connected to the side of the motor 202's output end that passes through the support frame 201 via a key transmission. The gear 204 is fixedly mounted on the drive wheel 203. The slider 205 is fixedly mounted on the inner bottom wall of the support frame 201 and slidably connected to the inner wall of the groove 104. The support frame 201 serves as the load-bearing frame of the guide mechanism 2, fixing the motor 202 and the drive wheel 203. The three components connect the support mechanism 1 to the drive mechanism 3 below to achieve force transmission. The motor 202 provides the power source for horizontal movement. By driving the drive wheel 203 to rotate, it drives the gear 204 to mesh with the rack 103, realizing the lateral displacement of the lifting mechanism. The drive wheel 203 bears the weight of the guide mechanism 2 and transmits the power of the motor 202. By contacting the inner wall of the guide groove 102, it restricts vertical jump and ensures the stability of the movement process. The gear 204 and the rack 103 mesh to form a high-precision transmission pair, which converts the rotational motion of the motor 202 into horizontal linear motion, improving the positional accuracy of the lateral movement. The slider 205 slides in the slide groove 104 and cooperates with the gear 204 and rack 103 to form a double guiding constraint, avoiding the guide mechanism 2 from swaying or jamming during movement.

[0037] In the above embodiments, as a preferred option, the drive mechanism 3 includes a mounting base 301, a take-up roller 302, and a heavy-duty motor 303. The mounting base 301 is fixedly installed on the bottom of the support frame 201. The take-up roller 302 is rotatably connected to the inner wall of the mounting base 301. The heavy-duty motor 303 is fixedly installed on one side of the mounting base 301. The output end of the heavy-duty motor 303 is connected to the outer wall of the take-up roller 302 via a key drive. The mounting base 301 fixes the take-up roller 302 and the heavy-duty motor 303, transferring the weight of the drive mechanism 3 to the support frame 201, ensuring the stability of the power components during operation. The take-up roller 302 rotates to achieve the winding and unwinding of the traction steel cable 502. Its cylindrical surface design ensures uniform winding of the steel cable and avoids stress concentration caused by local stacking. The heavy-duty motor 303 provides high-power power output for the lifting action, adapting to the high load requirements when lifting heavy objects. Its output torque matches that of the take-up roller 302, ensuring stable winding and unwinding speed of the steel cable.

[0038] In the above embodiments, as a preferred option, the fixed wheel set 4 further includes a fixed seat 401 and a first protective shell 402. The fixed seat 401 is fixedly installed on the bottom of the support frame 201, and the first protective shell 402 is fixedly installed on the bottom of the fixed seat 401. The inner wall of the first protective shell 402 is rotatably connected to the first fixed wheel 403 and the second fixed wheel 404 respectively. The fixed wheel set 4 is fixed to the bottom of the support frame 201 by the fixed seat 401, providing rigid support for the first fixed wheel 403 and the second fixed wheel 404 to ensure the stability of the wheel set position. The first protective shell 402 covers the first fixed wheel 403 and the second fixed wheel 404 to prevent dust and debris from entering the wheel axle gap, reduce component wear, and prevent the steel cable from accidentally falling off.

[0039] In the above embodiments, as a preferred option, the pulley block 6 further includes a second protective shell 601 and a hook 604. The second protective shell 601 is sleeved on the outside of the first movable pulley 602 and the second movable pulley 603. The hook 604 is fixedly installed on the bottom of the second protective shell 601. By wrapping the first movable pulley 602 and the second movable pulley 603 with the second protective shell 601, the contact part between the pulley shaft and the steel cable is protected from external environmental corrosion, while limiting the lateral displacement of the steel cable. The hook 604 is directly connected to the heavy object. Its rigid structure ensures the stability of the heavy object during the hoisting process. The bottom opening design facilitates quick hooking and is suitable for different types of hoisting operations.

[0040] In this invention, the working steps of the device are as follows:

[0041] 1. Lower the hook (604):

[0042] Start the heavy-duty motor 303 of the drive mechanism 3, control the winding roller 302 to rotate in the opposite direction, release the traction steel cable 502, the steel cable unfolds along the path of the first movable pulley 602, the first fixed wheel 403 and the second movable pulley 603, driving the pulley block 6 and the hook 604 to descend vertically until the hook 604 is lowered to the height of the heavy object hook.

[0043] 2. Secure the heavy object:

[0044] Hang the heavy object on the hook 604, ensuring the hook is secure. Check that the center of gravity of the heavy object is aligned with the center line of the hook 604 to avoid uneven loading.

[0045] 3. Lifting of heavy objects:

[0046] Reverse start, take-up roller 302 rotates forward to retract traction cable 502. Through the synergistic action of multiple pulley blocks 6, the cable converts the tension of heavy-duty motor 303 into multiple lifting force, driving the heavy object to rise steadily. During the lifting process, the multi-support layout of fixed wheel block 4 and pulley block 6 ensures that the cable is evenly stressed and reduces the swaying of the heavy object. At the same time, the winding state of traction cable 502 is observed to avoid stacking and shifting on take-up roller 302.

[0047] 4. Horizontal transfer stage:

[0048] Lateral movement adjustment: Once the load is raised to a safe height, the motor 202 of the guide mechanism 2 is started. Through the meshing transmission of gear 204 and rack 103, combined with the guiding constraint of slider 205 and slide groove 104, the entire lifting mechanism and the load are driven to move horizontally along the support beam 101 until they reach above the target position. During the movement, the stop position is controlled by the high-precision transmission of gear 204 and rack 103 to ensure that the horizontal deviation between the load and the target landing point is within the allowable range. Then, the motor 202 is turned off and locked.

[0049] 5. Lower the heavy object slowly:

[0050] Control the take-up roller 302 to rotate in the opposite direction again, release the traction cable 502, and slowly lower the load to the target landing point. Unload the connection between the hook 604 and the load, reset the mechanism to retract the traction cable 502, and raise the hook 604 to the safe parking height. Start the guide mechanism 2 to move the lifting components to the initial parking position, shut off all power devices, and complete the operation process.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hoisting mechanism for a hook bridge crane, comprising a drive mechanism (3), a fixed wheel assembly (4), a traction mechanism (5), and a pulley block (6), characterized in that: wherein: The drive mechanism (3) is located on one side of the fixed wheel set (4) to provide power to the traction mechanism (5); The fixed wheel assembly (4) includes a first fixed wheel (403) and a second fixed wheel (404), wherein the second fixed wheel (404) is rotatably disposed below the first fixed wheel (403); The pulley block (6) includes a first movable pulley (602) and a second movable pulley (603), with the second movable pulley (603) positioned below the first fixed pulley (403); The traction mechanism (5) includes a positioning ring (501) and a traction cable (502). The positioning ring (501) is sleeved on the outer wall of the second fixed wheel (404). One end of the traction cable (502) is fixedly connected to the outer surface of the positioning ring (501). The traction cable (502) passes through the first movable pulley (602), the first fixed wheel (403) and the second movable pulley (603) in sequence, and then connects to the drive mechanism (3).

2. The hoisting mechanism of a hook bridge crane according to claim 1, characterized in that: It also includes a support mechanism (1), which includes a support beam (101), a guide groove (102), a rack (103) and a slide (104). The two guide grooves (102) are respectively opened on both sides of the outer surface of the support beam (101), the two racks (103) are respectively fixedly installed on the inner bottom wall of the two guide grooves (102), and the slide (104) is opened in the middle of the bottom of the support beam (101).

3. The hoisting mechanism of a hook bridge crane according to claim 2, characterized in that: A guide mechanism (2) is provided below the support mechanism (1). The guide mechanism (2) includes a support frame (201), a motor (202), a drive wheel (203), a gear (204), and a slider (205). Multiple motors (202) are fixedly installed on one side of the outer surface of the support frame (201). Multiple drive wheels (203) are rotatably installed on both sides of the inner wall of the support frame (201). One side of a portion of the drive wheels (203) is connected to the side of the motor (202) output end that passes through the support frame (201) via a key drive. The gear (204) is fixedly installed on the drive wheel (203). The slider (205) is fixedly installed on the inner bottom wall of the support frame (201) and is slidably connected to the inner wall of the slide groove (104).

4. The hoisting mechanism of a hook bridge crane according to claim 3, characterized in that: The drive mechanism (3) includes a mounting base (301), a take-up roller (302), and a heavy-duty motor (303). The mounting base (301) is fixedly installed on the bottom of the support frame (201). The take-up roller (302) is rotatably connected to the inner wall of the mounting base (301). The heavy-duty motor (303) is fixedly installed on one side of the mounting base (301). The output end of the heavy-duty motor (303) is connected to the outer wall of the take-up roller (302) via a key drive.

5. The hoisting mechanism of a hook bridge crane according to claim 3, characterized in that: The fixed wheel assembly (4) further includes a fixed seat (401) and a first protective shell (402). The fixed seat (401) is fixedly installed on the bottom of the support frame (201), and the first protective shell (402) is fixedly installed on the bottom of the fixed seat (401). The inner wall of the first protective shell (402) is rotatably connected to the first fixed wheel (403) and the second fixed wheel (404) respectively.

6. The hoisting mechanism of a hook bridge crane according to claim 1, characterized in that: The pulley block (6) also includes a second protective shell (601) and a hook (604). The second protective shell (601) is sleeved on the outside of the first movable pulley (602) and the second movable pulley (603), and the hook (604) is fixedly installed on the bottom of the second protective shell (601).

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