A lightweight Chinese bridge crane

Abstract

The invention discloses a lightweight Chinese-style bridge crane, which relates to the field of lifting equipment and aims to solve the problems that the existing bridge crane has a simple structure, is prone to shaking when lifting objects, and the overall equipment is too large and too heavy, resulting in excessively high production and transportation costs. The invention comprises a mobile frame, a main beam and a lifting trolley, wherein the mobile frame has two groups, the two groups of mobile frames are fixedly connected to both sides of the main beam, the lifting trolley is slidably connected to the main beam, the lifting trolley comprises a lifting block and a hook, the hook is rotatably connected to the bottom of the lifting block, a lifting rope is connected between the upper end of the lifting block and the lifting trolley, lifting block balancers are fixedly connected on both sides of the lifting block, and adjustment brackets are arranged on both sides of the main beam. The invention has the advantages that the lifting block is stabilized by the lifting block balancer to avoid shaking during the lifting process, the whole is stabilized by the balance rope, the balance rope is light in weight as a whole, is easy to store, has strong flexibility, reduces the overall weight and volume of the device, and reduces the cost of production and transportation.

Description

Technical Field

[0001] The invention relates to the technical field of lifting equipment, and in particular to a lightweight Chinese-style bridge crane. Background Art

[0002] In the field of modern manufacturing and logistics transportation, bridge cranes, as important lifting equipment, are widely used in cargo lifting and handling in workshops, warehouses and other places. In the lifting process of the bridge crane, the wire rope, as a flexible component, undertakes the important task of connecting the crane and the heavy object. However, when the crane is starting, stopping, accelerating or decelerating, the wire rope often swings due to the action of inertia. This swing not only affects the accuracy and stability of the lifting operation, but also may cause safety hazards to the crane itself and the surrounding environment. Especially when the lifting weight is far away from the crossbeam of the bridge crane and the crane is started and stopped suddenly, the swing of the weight will be more violent and may even cause an accident.

[0003] The patent with the publication number of "CN117819399A" discloses a bridge crane, which includes "a guide rail; a crossbeam is arranged on the guide rail; a moving trolley is slidably arranged on the crossbeam; a fixed cylinder is fixed on the moving trolley, and a through hole for the wire rope to pass through is arranged in the fixed cylinder; a lifting member is fixed to the lower end of the wire rope, and the lifting member includes an upper connecting section and a lower connecting section that are hooked and matched; the fixed cylinder includes a first connecting section, a second connecting section, a third connecting section and a fourth connecting section that are fixedly connected in sequence from top to bottom; the third center hole and the fourth center hole are respectively adapted to the guide of the lifting structure; the second connecting section is provided with an upper fixing structure, and the upper fixing structure can be fixedly connected with the upper connecting section to realize the fixation of the upper connecting section and the fixed cylinder. The fourth connecting section is provided with a lower fixing structure, which can be fixedly connected to the lower connecting section to realize the fixed connection between the lower connecting section and the fixing cylinder. This application replaces the lifting of objects by steel wire rope with the lifting of objects by fixing cylinder. Although it solves the problem of shaking of objects during lifting to a certain extent, in real life, the overall weight of objects lifted by cranes is relatively large. In order to meet the lifting bearing capacity during lifting, the fixing cylinder must have a certain thickness, and the corresponding fixing cylinder itself will have a large dead weight, which increases the initial weight of the crane main beam, and also increases the overall dead weight of the device, thereby increasing the manufacturing cost of the crane during production and the transportation cost during transportation. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a lightweight Chinese bridge crane. Through this design, the problems of the existing bridge crane being simple in structure, prone to shaking when lifting objects, and the overall equipment being too large and too heavy, resulting in excessively high production and transportation costs, are effectively solved.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the present invention comprises a mobile frame, a main beam and a lifting trolley, the mobile frame has two groups, the two groups of mobile frames are fixedly connected to the two sides of the main beam, the lifting trolley is slidably connected to the main beam, the lifting trolley comprises a lifting block and a hook, the hook is rotatably connected to the bottom of the lifting block, a lifting rope is connected between the upper end of the lifting block and the lifting trolley, a lifting block balancer is fixedly connected to the two sides of the lifting block, and an adjustment bracket cooperating with the lifting block balancer is provided on both sides of the main beam;

[0006] The hoist block balancer comprises two symmetrically distributed balance ropes, one end of the balance rope is fixedly connected to a hanging ring, the hanging ring is fixedly connected to the lifting block, the other end of the balance rope is fixedly connected to a winding drum, the winding drum is rotatably mounted on the mobile frame, and the middle part of the balance rope is matched with a fixed pulley block;

[0007] The adjusting bracket includes an adjusting rod, a telescopic rod and a connecting rod, the adjusting rod is hinged to the main beam, the telescopic rod is hinged to the movable frame, the telescopic rod is located below the adjusting rod, the adjusting rod is hinged to the telescopic rod, there are two telescopic rods, two adjusting rods and two connecting rods, the two telescopic rods and the two adjusting rods are symmetrically distributed about the center of the main beam, the two connecting rods are connected between the two adjusting rods, the two connecting rods are rotatably connected with guide wheels, the outer contours of the two guide wheels are tangent, and the balancing rope is located between the two guide wheels.

[0008] Preferably, the movable frame is fixedly connected to a support platform, the support platform is fixedly connected to a winding drum motor, an anti-falling gear set is installed between the winding drum motor and the winding drum, and the anti-falling gear set and the winding drum are both rotatably connected to the support platform.

[0009] Preferably, the anti-fall gear group includes a first gear and a second gear, the first gear is fixedly connected to the winding drum motor, the second gear is fixedly connected to the winding drum, the first gear and the second gear are meshed, the first gear is coaxially fixedly connected to a ratchet, the ratchet is matched with a pawl, one side of the pawl is rotatably connected to the support platform, and an electromagnetic suction block is fixedly connected to the support platform on the upper side of the pawl.

[0010] Preferably, a fixed frame is fixedly connected to the movable frame, the fixed frame extends outward from the movable frame, a support plate is fixedly connected to the movable frame, and the fixed pulley block is fixedly connected to the support plate.

[0011] Preferably, the lifting trolley also includes a lifting motor, an electromagnetic brake, a reducer, a cable arranging device and a lifting roller. The lifting motor is fixedly connected to a driving shaft, the electromagnetic brake is installed on the driving shaft, the driving shaft is fixedly connected to the input end of the reducer, the output end of the reducer is fixedly connected to the lifting roller, and the lifting rope passes through the cable arranging device and is fixedly connected to the lifting roller.

[0012] Preferably, the reducer includes a first reduction gear, a second reduction gear and a third reduction gear, the first reduction gear is fixedly connected to the drive shaft, the third reduction gear is fixedly connected to the lifting roller, and the second reduction gear is meshed between the first reduction gear and the third reduction gear.

[0013] Preferably, there are two groups of lifting ropes, and two wire storage areas are provided on the lifting roller. The wire arranger includes two relatively movable sliding sleeves, and the sliding sleeves are slidably connected to the outside of the lifting roller. The sliding sleeves are provided with through holes for the lifting ropes to pass through. A reciprocating slider is fixedly connected to the sliding sleeves, and the slider is slidably connected to the lifting trolley. The unidirectional moving length of the slider is equal to the width of the wire storage area.

[0014] Preferably, a guide rod and a reciprocating screw rod are fixedly connected to the lifting trolley, the guide rod is slidably connected to the slider, the reciprocating screw rod is threadedly connected to the slider, a cylindrical rod is provided on one side of the through hole, a rotating wheel is mounted on the cylindrical rod, and the lifting rope is wound around the rotating wheel.

[0015] Preferably, a movable pulley block is rotatably connected inside the lifting block, the lifting rope passes over the movable pulley block and is fixedly connected to the lifting trolley, a guide box is fixedly connected to the lifting trolley, a reversing wheel cooperating with the lifting rope is rotatably connected inside the guide box, a limiting wheel is provided on the side of the reversing wheel, and the limiting wheel is rotatably connected to the guide box.

[0016] Preferably, an oblique fixed shaft is fixedly connected to the lifting block, the movable pulley block is rotatably connected to the fixed shaft, a limit block is provided on one side of the movable pulley block, and the limit block is fixedly connected to the lifting block.

[0017] Compared with the prior art, the present invention has the following outstanding advantages:

[0018] The present invention installs a lifting block balancer on both sides of the lifting block, and uses four balancing ropes on the lifting block balancer to pull the two sides of the lifting wheel, thereby offsetting the shaking caused by inertia or wind force and other factors to a certain extent, balancing the inclination or shaking of the lifting block during the lifting process, and ensuring the stability and safety of the lifting operation.

[0019] The present invention arranges adjustment brackets at both ends of the main beam, and the adjustment brackets cooperate with the suspension block balancer to adjust the traction angle of the suspension block balancer, provide support and adjustment space for the suspension block balancer, and improve the safety and efficiency of the lifting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall axial side structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the forward structure of the present invention.

[0022] Figure 3 The structural schematic diagram of the lifting trolley is omitted for the present invention.

[0023] Figure 4 It is a schematic diagram of the axial side structure of the movable frame part of the present invention.

[0024] Figure 5 It is a schematic diagram of the forward structure of the movable frame part of the present invention.

[0025] Figure 6 It is a schematic diagram of the main beam structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the connection structure of the winding drum of the present invention.

[0027] Figure 8 It is a schematic diagram of the overall structure of the lifting trolley of the present invention.

[0028] Fig. 9 It is a schematic diagram of the rear end structure of the lifting trolley of the present invention.

[0029] Fig.10 It is a schematic diagram of the connection structure of the reducer of the present invention.

[0030] Fig.11 It is a schematic diagram of the connection structure of the lifting motor of the present invention.

[0031] Fig.12 It is a schematic diagram of the connection structure of the movable pulley block of the present invention.

[0032] Numbers in the figure: 1, mobile frame; 2, main beam; 3, lifting trolley; 301, lifting block; 302, hook; 303, lifting motor; 304, electromagnetic brake; 305, reducer; 30501, first reduction gear; 30502, second reduction gear; 30503, third reduction gear; 306, cable arranging device; 30601, sliding sleeve; 30602, through hole; 30603, slider; 30604, guide rod; 30605, reciprocating screw rod; 30606, cylindrical rod; 30607, rotating wheel; 307, lifting roller; 308, driving shaft; 309, line storage area; 310, lifting rope; 4, lifting block balancer; 401, balancing rope; 402, hanging ring; 403, winding drum; 404, fixed pulley block; 405, winding drum motor; 406, first gear; 407, second gear; 408, ratchet; 409, pawl; 5, adjusting bracket; 501, adjusting rod; 502, telescopic rod; 503, connecting rod; 504, guide wheel; 6, supporting platform; 7, fixed frame; 8, supporting plate; 9, movable pulley block; 10, guide box; 11, reversing wheel; 12, limiting wheel; 13, fixed shaft; 14, limiting block. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] Please refer to the attached Figure 1-12 The present embodiment is a lightweight Chinese-style bridge crane: it includes a moving frame 1, a main beam 2 and a lifting trolley 3, the moving frame 1 has two groups, the two groups of moving frames 1 are fixedly connected to both sides of the main beam 2, the lifting trolley 3 is slidably connected to the main beam 2, the lifting trolley 3 includes a lifting block 301 and a hook 302, the hook 302 is rotatably connected to the bottom of the lifting block 301, a lifting rope 310 is connected between the upper end of the lifting block 301 and the lifting trolley 3, the lifting block 301 is fixedly connected to both sides with a lifting block balancer 4, and both sides of the main beam 2 are provided with an adjustment bracket 5 that cooperates with the lifting block balancer 4.

[0035] The main structure of the device is the same as the main components of the traditional bridge crane. There are two groups of mobile frames 1. The mobile frames 1 are triangular in structure as a whole. The upper end of the mobile frame 1 is narrow and the lower end is wide, which can improve the stability of the bottom. At the same time, the middle part of the mobile frame 1 is a connecting rod 503 that is relatively poor to each other, which divides the mobile frame 1 into multiple triangular structures to increase the load-bearing capacity of the mobile frame 1. The two groups of mobile frames 1 support the middle main beam 2 on the left and right sides. Casters are installed at the bottom of the mobile frame 1, and ground rails are installed at the bottom of the casters. The mobile frame 1 can move forward and backward along the ground rails under the action of the casters, thereby improving the operating range of the main beam 2. The middle main beam 2 is horizontally mounted on the upper ends of the two mobile frames 1. A transverse slide rail is installed on the main beam 2, and the slide rail plays a guiding role for the lifting trolley 3. Four slide rail wheels are installed at the bottom of the lifting trolley 3, and the slide rail wheels are responsible for the left and right movement of the lifting trolley 3 on the slide rail. The mobile frame 1 and the main beam 2 are made of high-strength steel. When the lifting trolley 3 is working, both can withstand huge loads and stresses. The lifting trolley 3 controls the lifting and lowering of the hook 302 through the lifting rope 310. The lifting block 301 is an intermediate component connecting the lifting rope 310 and the hook 302. The lifting rope 310 transmits power to the hook 302 through the lifting block 301, and the hook 302 is directly connected to the heavy object. 1, the hook 302 lifts the suspended weight upwards, the hook 302 is optionally assembled with the lifting block 301, and can adapt to different lifting requirements during the lifting and lowering process, while avoiding accidents caused by the self-rotation of the lifting rope 310. Generally speaking, the mobile frame 1, the main beam 2 and the lifting trolley 3 are mainly used for supporting, moving and lifting heavy objects. In order to maintain stability during the lifting process, a lifting block balancer 4 and an adjusting bracket 5 are installed on both sides of the lifting block 301, wherein the lifting block balancer 4 and the adjusting bracket 5 are each provided with two groups, and the two groups of lifting block balancers 4 and the adjusting bracket 5 can balance the two sides of the lifting block 301 to the left and right. During the lifting process, the block balancer 4 can prevent the lifting block 301 from tilting and shaking during the lifting process, ensuring the stability and safety of the lifting operation. The adjusting bracket 5 is on both sides of the main beam 2, and the adjusting bracket 5 cooperates with the balancing rope 401 in the block balancer 4. By changing the angle of the adjusting bracket 5, the force direction of the balancing rope 401 on the lifting block 301 can be changed. The adjusting bracket 5 provides support and adjustment space for the block balancer 4 to ensure that the block balancer 4 can effectively play its role. In addition, by adjusting the angle of the adjusting bracket 5, it can adapt to loads of different weights and shapes, further improving the safety and efficiency of the lifting operation.

[0036] The lifting block balancer 4 includes two symmetrically distributed balancing ropes 401, one end of the balancing rope 401 is fixedly connected to a hanging ring 402, the hanging ring 402 is fixedly connected to the lifting block 301, the other end of the balancing rope 401 is fixedly connected to a winding drum 403, the winding drum 403 is rotatably installed on the mobile frame 1, and the middle part of the balancing rope 401 is matched with a fixed pulley group 404.

[0037] The balancing rope 401 is made of high-strength, wear-resistant material, which can ensure the normal operation of the lifting block balancer and ensure that it can maintain good performance under long-term and high-load working conditions. Each set of lifting block balancer 4 is equipped with two balancing ropes 401, and the two balancing ropes 401 are symmetrically distributed front and back about the lifting block 301. The balancing rope 401 provides additional tension to the lifting block 301 to offset the problem of tilting or shaking that may occur during the lifting process. In order to facilitate the connection between the balancing rope 401 and the lifting block 301, two hanging rings 402 are provided on both sides of the lifting block 301. Bolts are fixedly connected to the inner side of the hanging ring 402. The hanging ring 402 is fixed to the four sides of the lifting block 301 through the threaded cooperation of the bolts and the lifting block 301. The balancing rope 401 is fixed through the circular ring of the hanging ring 402. In this way, the tension of the balancing rope 401 can be effectively transmitted to the lifting block 301 through the hanging ring 402. The other end of the balancing rope 401 is fixedly connected to the winding drum 403. 3 is used to retract and release the balance rope 401. By adjusting the rotation direction and speed of the winding drum 403, the length of the balance rope 401 can be controlled, thereby achieving fine adjustment of the balance of the lifting block 301. The winding drum 403 is made of solid metal material and is equipped with an appropriate driving mechanism (such as a motor, a hand wheel, etc.) so that the operator can easily control its rotation. Since the middle part of the balance rope 401 needs to bypass one side of the main beam 2, in order to reduce the wear of the balance rope 401, a fixed pulley group 404 is fixed to the end of the main beam 2. The fixed pulley group 404 is used to change the direction of the balance rope 401 and reduce the friction force to avoid excessive wear and energy loss of the balance rope 401. There are multiple fixed pulleys in the fixed pulley group 404, which mainly play the role of reversing the balance rope 401. When the balance rope 401 passes through the fixed pulley, its direction will change, which not only helps to disperse the tension and reduce the energy loss caused by friction, but also keeps the balance rope 401 stable during movement to avoid twisting or entanglement.

[0038] The adjusting bracket 5 includes an adjusting rod 501, a telescopic rod 502 and a connecting rod 503. The adjusting rod 501 is hinged to the main beam 2, the telescopic rod 502 is hinged to the mobile frame 1, the telescopic rod 502 is located below the adjusting rod 501, the adjusting rod 501 is hinged to the telescopic rod 502, there are two telescopic rods 502, two adjusting rods 501 and two connecting rods 503, the two telescopic rods 502 and the two adjusting rods 501 are symmetrically distributed about the center of the main beam 2, the two connecting rods 503 are connected between the two adjusting rods 501, the two connecting rods 503 are rotatably connected with guide wheels 504, the outer contours of the two guide wheels 504 are tangent, and the balancing rope 401 is located between the two guide wheels 504.

[0039] The hinge point between the adjusting rod 501 and the main beam 2 is located below the main beam 2. The adjusting rod 501 is located inside the mobile frame 1. The telescopic rod 502 is located below the adjusting rod 501. The telescopic rod 502 refers to a telescopic component that can be self-locking after changing its own length, such as a hydraulic rod. The bottom of the telescopic rod 502 is hinged to the mobile frame 1. The change in the length of the telescopic rod 502 can drive the change in the tilt angle of the adjusting rod 501. Figure 5 As shown, when the telescopic rod 502 contracts and becomes shorter, the telescopic rod 502 drives the adjusting rod 501 to rotate downward, and the adjusting rod 501 rotates downward to drive the two connecting rods 503 to rotate downward, and the two connecting rods 503 drive the guide rods 30604 to move downward, so that the guide wheel 504 drives the balance rope 401 to move downward, and the force direction of the balance rope 401 is adjusted. At the same time, when the condition rotates downward, the two connecting rods 503 and the guide wheel 504 are closer to the moving frame 1 at the end. At this time, when the lifting trolley 3 moves, it can be moved to the side position without affecting the displacement stroke of the lifting trolley 3. When the lifting trolley 3 is located in the middle of the main beam 2, the adjusting rod 501 is horizontally located below the main beam 2. At this time, the telescopic rod 502 A support point is provided on the lower side of the main beam 2 to improve the overall load-bearing effect of the main beam 2. Two connecting rods 503 are provided on the adjusting rod 501. Each connecting rod 503 is provided with two guide wheels 504. The two sets of guide wheels 504 cooperate with the two balancing ropes 401. In the two guide wheels 504 of each balancing rope 401, one guide wheel 504 is located on the upper side of the balancing rope 401, and the other guide wheel 504 is located on the lower side of the balancing rope 401. The tangency of the outer contours of the two guide wheels 504 can prevent the balancing rope 401 from slipping out of the guide wheel 504. The position of the guide wheel 504 is adjusted with the adjusting frame to ensure that the balancing rope 401 can move along the optimal path, thereby achieving the best balancing effect.

[0040] A support platform 6 is installed outside the mobile frame 1. The bottom of the support platform 6 has multiple reinforcing ribs. The support platform 6 is used to carry the winding drum 403 and the winding motor 405 and the anti-falling gear set that drive the winding drum 403 to rotate. The winding drum motor 405 is the power component of the winding drum 403. The anti-falling gear set is a connecting component connecting the winding drum motor 405 and the winding drum 403. The anti-falling gear set transmits the torque of the winding drum motor 405 to the winding drum 403, and controls the balance rope 403 through the rotation of the winding drum 403. 01 is retracted and released; in the anti-falling component, the first gear 406 is connected to the drum motor 405, and the second gear 407 is connected to the winding drum 403. The first gear 406 and the second gear 407 are meshed with each other to complete the torque transmission work. In addition, a ratchet 408 is coaxially mounted on the first gear 406. When the winding drum 403 reels the balance rope 401, the ratchet 408 and the pawl 409 are in a matching state. At this time, the ratchet 408 can rotate relative to the pawl 409. When the cargo is overweight, The pawl 409 can limit the reverse position of the ratchet 408 to prevent the winding drum 403 from rewinding the balance rope 401. An electromagnetic suction block is installed on the upper side of the pawl 409. Under normal circumstances, the electromagnetic suction block is in a power-off state and has no attraction to the pawl 409. At this time, the ratchet can freely cooperate with the ratchet 408 to allow the winding drum 403 to rotate in the driving direction. In this way, even if the motor stops working or reverses, the pawl 409 will prevent the ratchet 408 and the winding drum 403 from rotating in the non-driving direction. The winding drum motor 405 rotates in the opposite direction to prevent the load from falling. When the balance rope 401 needs to be replayed, the electromagnetic suction block is energized. After the electromagnetic suction block is energized, the electromagnetic suction block generates magnetism to attract the pawl 409 upwards. Then the pawl 409 is disengaged from the ratchet wheel 408. The winding drum motor 405 controls the winding drum 403 to replay the balance rope 401 through the first gear 406 and the second gear 407, thereby ensuring the safety of the winding drum 403 during the process of winding and replaying the balance rope 401.

[0041] The fixed frame 7 and the upper end of the mobile frame 1 form a rectangular hole that is transparent on the left and right. The end of the main beam 2 is installed in this rectangular hole. The main beam 2 and the fixed frame 7 are installed and fixed by fixing bolts. The fixed frame 7 is inclined toward the outside of the mobile frame 1. Such fixation can increase the overall stability of the device, so that the mobile frame 1 can better support the main beam 2. The support plate 8 provides a stable installation plane for the fixed pulley group 404. The four fixed pulleys in the fixed pulley group 404 are grouped in two, one group of which is installed forwardly above the support plate 8, and the other group is installed obliquely on the oblique side of the support plate 8. Such an arrangement ensures that the fixed pulley group 404 can maintain a stable position and angle during the lifting process, thereby effectively guiding the movement of the balance rope 401.

[0042] Similarly, a lifting roller 307 for controlling the lifting and lowering of the lifting rope 310 and a lifting motor 303 for driving the lifting roller 307 to rotate are also installed on the lifting trolley 3. Since the lifting rope 310 plays a major bearing role in the lifting work, in order to ensure the stability and safety of the lifting process, an electromagnetic brake 304 is installed outside the lifting motor 303. The electromagnetic brake 304 is installed on the drive shaft 308 and is used to quickly stop the rotation of the drive shaft 308 when necessary, thereby achieving precise control of the lifting process. When the electromagnetic brake 304 is activated, it will lock the drive shaft 308 through friction or braking torque to prevent it from continuing to rotate. The electromagnetic brake 304 provides protection for lifting safety and further improves the lifting stability. A speed reducer 305 is installed between the lifting motor 303 and the lifting roller 307. The speed reducer 305 reduces the rotation speed of the lifting roller 307 and increases its torque, which helps to ensure that the lifting roller 307 can rotate at an appropriate speed during the lifting process and generate sufficient pulling force to lift the load. When the lifting roller 307 retracts and releases the lifting rope 310, it must first pass through the cable arranger 306. The cable arranger 306 is installed near the lifting roller 307 and is connected to the lifting rope 310. The main function of the cable arranger 306 is to ensure that the lifting rope 310 can move smoothly along the predetermined path during the lifting process to avoid entanglement, knotting or excessive wear. Finally, the lifting rope 310 is neatly wound around the lifting roller 307 through the cable arranger 306.

[0043] The modules of the first reduction gear 30501, the second reduction gear 30502 and the third reduction gear 30503 in the reducer 305 increase successively. The first reduction gear 30501 is connected to the driving shaft 308. The first reduction gear 30501 can be driven to rotate through the lifting motor 303 and the driving shaft 308. The rotation of the first reduction gear 30501 drives the second reduction gear 30502 to rotate. The rotation of the second reduction gear 30502 drives the third reduction gear 30503 to rotate. The third reduction gear 30503 drives the rotation of the lifting roller 307, thereby completing the work of the lifting roller 307 to retract and release the lifting rope 310.

[0044] In order to balance the load and improve the stability of the lifting process, the lifting rope 310 is set to two groups, and the corresponding lifting roller 307 is divided into two wire storage areas 309. The two wire storage areas 309 cooperate with the two groups of lifting ropes 310. The wire arranger 306 is a key component for managing the movement of the lifting rope 310. It includes two relatively movable sliding sleeves 30601. The two sliding sleeves 30601 correspond to the two groups of lifting ropes 310 respectively and are slidably connected to the outside of the lifting roller 307. The two groups of sliding sleeves 30601 move relatively along the axial direction of the lifting roller 307, so as to adjust the position of the lifting rope 310 in the wire storage area 309 according to the lifting requirements. The arrangement helps to keep the lifting rope 310 neatly arranged and avoid entanglement and knotting. Each sliding sleeve 30601 is provided with a through hole 30602 for the lifting rope 310 to pass through. The through hole 30602 is tilted on the sliding sleeve 30601, and the diameter of the through hole 30602 is larger than the diameter of the lifting rope 310 to ensure that the lifting rope 310 can smoothly pass through the sliding sleeve 30601 and remain stable during the lifting process. The reciprocating sliding of the sliding sleeve 30601 is driven by the movement of the slider 30603, and the reciprocating movement of the slider 30603 is achieved by cooperating with the reciprocating screw rod. A driving motor is connected, which can drive the reciprocating screw 30605 to rotate. The rotating reciprocating screw 30605 cooperates with the thread of the slider 30603 to drive the slider 30603 to move back and forth. The guide rod 30604 guides the movement of the slider 30603. The guide rod 30604 and the reciprocating screw 30605 are placed horizontally to prevent the slider 30603 from rotating relative to the two, so that the slider 30603 reciprocates along the thread groove of the reciprocating screw 30605. In order to make the cable arranger 306 and the lifting roller 307 better cooperate, the reciprocating screw 30 The width of the threaded groove on 605 is the same as the width of the wire storage area 309, ensuring that after the sling rope 310 passes through the wire arrangement device 306, the rolled-up sling rope 310 is located in the wire storage area 309 of the lifting roller 307. Furthermore, in order to make the sling rope 310 smoothly transition at the through hole 30602, a cylindrical rod 30606 and a rotating wheel 30607 are provided on the front side of the through hole 30602. The rotating wheel 30607 can both rotate and slide left and right on the cylindrical rod 30606. The presence of the rotating wheel 30607 helps to reduce the friction and wear of the sling rope 310, making the rolling and releasing of the sling rope 310 smoother.

[0045] Furthermore, in order to enrich the guiding and reversing mechanism of the suspension rope 310 between the lifting block 301 and the cable arranger 306, a guide box 10 is installed between the suspension rope 310, and the guide box 10 is installed on the lifting trolley 3. The upper and lower ends of the guide box 10 are provided with wire holes for the suspension rope 310 to pass through. A reversing wheel 11 is rotatably connected in the guide box 10, and the reversing wheel 11 is closely matched with the suspension rope 310. The main function of the reversing wheel 11 is to change the direction of the suspension rope 310 so that the suspension rope 310 can move according to a predetermined path. The limiting wheel 12 is arranged on the side of the reversing wheel 11. The main function of the limiting wheel 12 is The purpose is to limit the position of the lifting rope 310 on the reversing wheel 11 to prevent the lifting rope 310 from deviating from the predetermined path or getting entangled during the movement. In addition, in order to improve the load capacity of the lifting rope 310, a movable pulley block 9 is installed on the lifting block 301, and the lifting rope 310 passes around the movable pulley block 9. After the lifting rope 310 passes around the movable pulley block 9, it is fixedly connected to the lifting trolley 3. This connection method enables the lifting rope 310 to move freely with the rotation of the movable pulley block 9 when the lifting trolley 3 moves or lifts the load, thereby ensuring that the load can be lifted or lowered smoothly, and the lifting rope 310 is pulled in a cross direction above the movable pulley block 9.

[0046] Furthermore, if the movable pulley block 9 is placed horizontally, the lifting rope 310 on the fixed pulley block 404 will rub against each other. In order to avoid wear of the lifting rope 310, the fixed shaft 13 for fixing the movable pulley block 9 is installed on the lifting block 301 and is placed tilted. Since the fixed shaft 13 is inclined, the movable pulley block 9 can produce a certain tilt angle when rotating, which helps to adjust the force direction and angle of the lifting rope 310, making the lifting process smoother. When there is one lifting rope 310, there is a group of movable pulleys in the movable pulley block 9. When there are two lifting ropes 310, there are two movable pulleys in the movable pulley block 9, and the two movable pulleys are symmetrically distributed. The limit block 14 is located on the side of the movable pulley to prevent the lifting rope 310 from being out of the groove in the movable pulley. When there are two movable pulleys, the limit block 14 is a V-shaped structure. The limit block 14 is located between the two movable pulleys, which effectively limits the position of the lifting rope 310.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightweight Chinese-style bridge crane, characterized by: The invention comprises a mobile frame (1), a main beam (2) and a lifting trolley (3), wherein the mobile frame (1) comprises two groups, the two groups of mobile frames (1) are fixedly connected to both sides of the main beam (2), the lifting trolley (3) is slidably connected to the main beam (2), the lifting trolley (3) comprises a lifting block (301) and a lifting hook (302), the lifting hook (302) is rotatably connected to the bottom of the lifting block (301), a lifting rope (310) is connected between the upper end of the lifting block (301) and the lifting trolley (3), both sides of the lifting block (301) are fixedly connected to a lifting block balancer (4), and both sides of the main beam (2) are provided with an adjustment bracket (5) matched with the lifting block balancer (4); The lifting block balancer (4) comprises two symmetrically distributed balancing ropes (401), one end of each balancing rope (401) is fixedly connected to a hanging ring (402), the hanging ring (402) is fixedly connected to the lifting block (301), the other end of each balancing rope (401) is fixedly connected to a winding drum (403), the winding drum (403) is rotatably mounted on the mobile frame (1), and a fixed pulley block (404) is matched in the middle of each balancing rope (401); The adjusting bracket (5) comprises an adjusting rod (501), a telescopic rod (502) and a connecting rod (503); the adjusting rod (501) is hinged to the main beam (2); the telescopic rod (502) is hinged to the moving frame (1); the telescopic rod (502) is located below the adjusting rod (501); the adjusting rod (501) is hinged to the telescopic rod (502); there are two telescopic rods (502), two adjusting rods (501) and two connecting rods (503); the two telescopic rods (502) and the two adjusting rods (501) are symmetrically distributed about the center of the main beam (2); the two connecting rods (503) are connected between the two adjusting rods (501); the two connecting rods (503) are rotatably connected to guide wheels (504); the outer contours of the two guide wheels (504) are tangent to each other; and the balancing rope (401) is located between the two guide wheels (504).

2. A lightweight Chinese-style bridge crane according to claim 1, characterized in that: The mobile frame (1) is fixedly connected to a support platform (6), the support platform (6) is fixedly connected to a winding drum motor (405), an anti-falling gear set is installed between the winding drum motor (405) and the winding drum (403), and the anti-falling gear set and the winding drum (403) are both rotatably connected to the support platform (6).

3. A lightweight Chinese-style bridge crane according to claim 2, characterized in that: The anti-falling gear set comprises a first gear (406) and a second gear (407), wherein the first gear (406) is fixedly connected to the winding drum motor, and the second gear (407) is fixedly connected to the winding drum (403), the first gear (406) and the second gear (407) are meshed, the first gear (406) is coaxially fixedly connected to a ratchet (408), the ratchet (408) is matched with a pawl (409), one side of the pawl (409) is rotatably connected to the support platform (6), and an electromagnetic suction block is fixedly connected to the support platform (6) on the upper side of the pawl (409).

4. A lightweight Chinese-style bridge crane according to claim 1, characterized in that: A fixed frame (7) is fixedly connected to the mobile frame (1), the fixed frame (7) extends outside the mobile frame (1), a support plate (8) is fixedly connected to the mobile frame (1), and the fixed pulley block (404) is fixedly connected to the support plate (8).

5. The lightweight Chinese-style bridge crane according to claim 1 is characterized in that: The lifting trolley (3) also includes a lifting motor (303), an electromagnetic brake (304), a reducer (305), a cable arranging device (306) and a lifting roller (307). The lifting motor (303) is fixedly connected to a driving shaft (308). The electromagnetic brake (304) is installed on the driving shaft (308). The driving shaft (308) is fixedly connected to the input end of the reducer (305). The output end of the reducer (305) is fixedly connected to the lifting roller (307). The lifting rope (310) passes through the cable arranging device (306) and is fixedly connected to the lifting roller (307).

6. A lightweight Chinese-style bridge crane according to claim 5, characterized in that: The reducer (305) includes a first reduction gear (30501), a second reduction gear (30502) and a third reduction gear (30503), wherein the first reduction gear (30501) is fixedly connected to the drive shaft (308), the third reduction gear (30503) is fixedly connected to the lifting roller (307), and the second reduction gear (30502) is meshed between the first reduction gear (30501) and the third reduction gear (30503).

7. A lightweight Chinese-style bridge crane according to claim 5, characterized in that: There are two groups of lifting ropes (310), and two wire storage areas (309) are provided on the lifting roller (307). The wire arranger (306) includes two relatively movable sliding sleeves (30601), and the sliding sleeves (30601) are slidably connected to the outside of the lifting roller (307). The sliding sleeves (30601) are provided with through holes (30602) for the lifting ropes (310) to pass through. A reciprocating sliding block (30603) is fixedly connected to the sliding sleeve (30601), and the sliding block (30603) is slidably connected to the lifting trolley (3). The unidirectional moving length of the sliding block (30603) is equal to the width of the wire storage area (309).

8. A lightweight Chinese-style bridge crane according to claim 7, characterized in that: A guide rod (30604) and a reciprocating screw rod (30605) are fixedly connected to the lifting trolley (3); the guide rod (30604) is slidably connected to the slider (30603); the reciprocating screw rod (30605) is threadedly connected to the slider (30603); a cylindrical rod (30606) is provided on one side of the through hole (30602); a rotating wheel (30607) is sleeved on the cylindrical rod (30606); and the lifting rope (310) is wound around the rotating wheel (30607).

9. A lightweight Chinese-style bridge crane according to claim 1 or 5, characterized in that: The lifting block (301) is rotatably connected to a movable pulley block (9), the lifting rope (310) passes over the movable pulley block (9) and is fixedly connected to the lifting trolley (3), the lifting trolley (3) is fixedly connected to a guide box (10), a reversing wheel (11) cooperating with the lifting rope (310) is rotatably connected to the guide box (10), a limiting wheel (12) is provided on the side of the reversing wheel (11), and the limiting wheel (12) is rotatably connected to the guide box (10).

10. A lightweight Chinese-style bridge crane according to claim 9, characterized in that: An oblique fixed shaft (13) is fixedly connected to the lifting block (301), the movable pulley block (9) is rotatably connected to the fixed shaft (13), a limit block (14) is provided on one side of the movable pulley block (9), and the limit block (14) is fixedly connected to the lifting block (301).

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