Lifting mechanism of bridge crane

Abstract

The invention discloses a bridge crane lifting mechanism, and relates to the field of bridge cranes, the bridge crane lifting mechanism comprises a crane carriage, the outer side of the crane carriage is matched with two bridge frames, the two bridge frames are arranged in a bilateral symmetry mode with the center line of the crane carriage as the symmetry axis, and the outer sides of the two bridge frames are provided with two connecting blocks; the two connecting blocks are symmetrically arranged front and back with the center line of the crane carriage as the symmetry axis, a plurality of moving rollers are arranged on the outer sides of the connecting blocks, rails are arranged at the bottoms of the moving rollers on each side, the two rails are connected with a plant structure, and a protective cover is arranged at the top of the crane carriage. A hoisting assembly is arranged in the protection cover, a winding roller is arranged at the top of the hoisting assembly, a vertical plate is arranged on the rear side of the protection cover, and a wire coiling assembly is arranged on the rear side of the vertical plate. According to the hoisting device, through cooperation of the opening assembly and the adjusting assembly, fine adjustment of the height and the position of the hoisting hook can be completed, and the hoisting efficiency is improved; the burden of workers is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge cranes, and in particular to a lifting mechanism of a bridge crane. Background Art

[0002] A crane is a multi-action lifting machine that can lift and carry heavy objects vertically and horizontally within a certain range. It is also called an overhead crane, an overhead crane, or a crane. A bridge crane is a lifting device that is horizontally mounted above a workshop, warehouse, or material yard to lift materials. Because its two ends are located on tall concrete columns or metal brackets, it looks like a bridge. The bridge of a bridge crane runs longitudinally along the tracks laid on the elevated platforms on both sides, making full use of the space under the bridge to lift materials without being hindered by ground equipment. It is the most widely used and most numerous type of lifting machine.

[0003] The lifting mechanism, also called the "lifting mechanism", is a basic component of the crane for lifting and lowering objects. The lifting mechanism is driven by the lifting motor through the coupling and the hollow shaft of the reducer to rotate the drum, so that the wire rope / cable wound on the drum drives the hook device to rise or fall. Corresponding couplings and support frames may be required for different lifting heights. The performance of the lifting mechanism will directly affect the performance of the entire crane.

[0004] When the existing lifting mechanism is picking up and placing goods, due to its large overall structure, it relies on the movement of the lifting trolley to position the hook, which will result in large deviations. At this time, it is necessary to manually pull the heavy hook to move it to mount or remove the goods, resulting in reduced efficiency in loading and unloading goods. In addition, the wear state of the wire rope cannot be identified during use and can only be checked manually on the lifting trolley, which is very dangerous.

[0005] Therefore, the present invention provides a bridge crane lifting mechanism to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a lifting mechanism of a bridge crane, which effectively solves the problem that the position adjustment of the hook will have large deviation when the existing lifting mechanism is taking and placing goods, and it is necessary to manually pull the heavier hook to move it to mount or dismantle the goods, resulting in a decrease in the efficiency of loading and unloading goods, and the wear state of the wire rope cannot be identified during use.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the present invention includes a lifting trolley, the outer side of the lifting trolley is matched with two bridge frames, the two bridge frames are arranged symmetrically left and right with the center line of the lifting trolley as the symmetry axis, two connecting blocks are arranged on the outer sides of the two bridge frames, the two connecting blocks are arranged symmetrically front and back with the center line of the lifting trolley as the symmetry axis, a plurality of moving rollers are arranged on the outer sides of the connecting blocks, the bottom of the moving rollers on each side is provided with a track, and the two tracks are connected to the plant structure, the top of the lifting trolley is provided with a protective cover, the inside of the protective cover is provided with a winch assembly, the top of the winch assembly is provided with a winding roller, the rear side of the protective cover is provided with a vertical plate, the rear side of the vertical plate is provided with a wire coiling assembly, the rear side of the wire coiling assembly is provided with a guide cylinder, the surface of the winding roller is provided with a steel wire rope, the steel wire rope passes through the guide cylinder, the other end of the steel wire rope is connected to the bottom of the lifting trolley, the bottom of the steel wire rope is provided with a lifting pulley, the outer side of the lifting pulley is provided with a limit box, and the bottom of the limit box is provided with a hook; A support assembly is provided at the bottom of the lifting trolley, and two sleeves are provided at the bottom of the support assembly. The two sleeves are symmetrically arranged front and back with the center line of the lifting trolley as the axis of symmetry. An adjustment assembly is provided inside the sleeve, and a frame is provided at the bottom of the adjustment assembly. A support pulley is provided inside the frame, and the support pulley and the wire rope are in conflict with each other.

[0008] Preferably, two support plates are provided on the outer side of the winding roller, and the two support plates are arranged symmetrically with the radial center line of the winding roller as the symmetry axis. A support shaft is provided inside the winding roller, and both ends of the support shaft are connected to the support plates. The winch assembly includes a winding motor, and the bottom of the winding motor is connected to the top of the lifting trolley.

[0009] Preferably, a driving gear is provided at the left end of the winding motor, the driving gear is connected to the support plate, a driven gear is meshed at the top of the driving gear, and the left side of the driven gear is connected to the winding roller.

[0010] Preferably, the wire winding assembly includes an electric push rod, which is interconnected with the rear side of the vertical plate, a slider is provided on the right side of the electric push rod, the slider is slidably connected to the rear side of the vertical plate, and a passive telescopic rod is provided on the rear side of the slider.

[0011] Preferably, a cylindrical rod is provided at the bottom of the passive telescopic rod, the cylindrical rod is connected to the rear side of the vertical plate, a transmission rod is provided at the rear side of the top of the passive telescopic rod, a connecting plate is provided at the rear side of the transmission rod, and the connecting plate is connected to the guide cylinder.

[0012] Preferably, the expansion assembly comprises a hydraulic telescopic rod, a rectangular block is provided at the bottom of the hydraulic telescopic rod, the left side of the rectangular block is connected to the sleeve, and a connecting rod is provided on the left side of the sleeve.

[0013] Preferably, a pin is provided on the outside of the connecting rod, a fixed block is provided on the left side of the pin, the top of the fixed block is connected to the bottom of the lifting trolley, two grooves are provided inside the fixed block, the two grooves are symmetrically arranged front and back with the center line of the fixed block as the axis of symmetry, and the grooves are connected to the pin.

[0014] Preferably, the adjustment component includes a fixed magnet plate, the fixed magnet plate is connected to the sleeve, a spring is provided at the bottom of the fixed magnet plate, an electromagnet plate is provided at the other end of the spring, a straight rod is provided at the bottom of the electromagnet plate, the bottom of the straight rod is connected to the frame, and an air pressure sensor is provided at the bottom of the fixed magnet plate.

[0015] Preferably, two swing rods are provided on the outer side of the lifting trolley, and the two swing rods are symmetrically arranged front to back with the center line of the lifting trolley as the symmetry axis, and driven rods are provided on the outer side of the middle part of the swing rods.

[0016] Preferably, a guardrail is provided on the top of the bridge frame, and two pairs of support wheels are provided on the outside of the lifting trolley. The two pairs of support wheels are arranged symmetrically with the center line of the lifting trolley as the axis of symmetry, and the support wheels are connected to the corresponding bridge frames.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can complete secondary fine adjustment of the height of the hook through the cooperation of the spreading component and the adjusting component, and can also perform secondary fine adjustment on the front and rear positions of the hook through the separate control of the adjusting component, thereby realizing precise positioning of the hook position, accelerating the efficiency of hoisting, and reducing the burden on workers.

[0018] 2. During the rising process of the hook, the speed of moving the goods up is accelerated by the cooperation of the support component and the adjustment component. At the same time, in the process of the two supporting pulleys being stretched, the tension of the wire rope can be increased, making the wire rope tighter during the movement, reducing the shaking of the hook, maintaining the stable and rapid lifting of the hook, and reducing the operating pressure of the winch component. During the descent of the hook, when the goods are about to touch the bottom, the coordination of the support component and the adjustment component is controlled to compensate for the descending distance before the goods touch the bottom, slowing down the speed of the goods when they touch the bottom, and preventing the goods from being damaged due to excessive speed when they touch the bottom.

[0019] 3. During cargo lifting, the state of the wire rope can be identified through the adjustment component, and the abnormal position of the wire rope can be identified through the cooperation of the adjustment component and the winch component. At the same time, the operation of the support component is controlled to reduce the tension of the support pulley on the wire ropes on both sides, and then the wire rope is quickly inspected and repaired. In the process of cargo lifting, if the adjustment component identifies that the wire rope is broken, the support component is quickly controlled to cooperate with the adjustment component to drive the follower rods on both sides to quickly contact the bottom of the bridge frame, fix the position of the lifting trolley, and prevent the wire rope from breaking instantly and generating unilateral inertia to push the lifting trolley to move quickly and cause a collision accident. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is a schematic diagram of the matching structure of the bridge frame, connecting blocks and movable rollers of the present invention.

[0022] Figure 3 It is a three-dimensional schematic diagram of the matching structure of the winch assembly and the hook of the present invention.

[0023] Figure 4 It is a plan view of the matching structure of the winch assembly and the hook of the present invention.

[0024] Figure 5 It is a cross-sectional schematic diagram of the protective cover of the present invention.

[0025] Figure 6 It is a schematic diagram of the coordination structure of the winding motor and the winding roller of the present invention.

[0026] Figure 7 It is a schematic diagram of the matching structure of the electric push rod and the guide cylinder of the present invention.

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

[0028] Fig. 9 It is a schematic diagram of the exploded cooperation between the fixing block and the adjusting assembly of the present invention.

[0029] Fig.10 It is a schematic diagram of the matching structure of the sleeve and the supporting pulley of the present invention.

[0030] Fig.11 It is a schematic diagram of the cooperation between the hydraulic telescopic rod and the sleeve of the present invention.

[0031] Numbers in the figure: 101, track; 102, connecting block; 103, moving roller; 104, guardrail; 105, protective cover; 106, lifting trolley; 107, supporting wheel; 108, bridge; 201, winding motor; 202, driving gear; 203, driven gear; 204, winding roller; 205, supporting plate; 206, supporting shaft; 207, wire rope; 208, limit box; 209, lifting pulley; 210, hook; 301, vertical plate; 302, electric push rod; 303, slider; 304, cylindrical rod; 305, passive telescopic rod; 306, transmission rod; 307, connecting plate; 308, guide cylinder; 401, fixed block; 402, groove; 403, pin rod; 404, connecting rod; 405, hydraulic telescopic rod; 406, rectangular block; 501, sleeve; 502, fixed magnet plate; 503, spring; 504, electromagnet plate; 505, straight rod; 506, frame; 507, supporting pulley; 508, swing rod; 509, driven rod. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-Figure 11 The specific implementation modes of the present invention are described in further detail.

[0033] The technical solutions in the embodiments of the present invention will be 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. Embodiment 1;

[0034] Depend on Figure 1-Figure 11The present invention proposes a lifting mechanism of a bridge crane: it includes a lifting trolley 106, and the outer side of the lifting trolley 106 is equipped with two bridge frames 108, and the two bridge frames 108 are arranged symmetrically with the center line of the lifting trolley 106 as the symmetry axis, and a guardrail 104 is provided on the top of the bridge frame 108. The guardrail 104 can prevent the lifting trolley 106 from falling when the objects fall during the forward and backward movement, and improve the safety of maintenance personnel during maintenance. Two pairs of support wheels 107 are provided on the outer side of the lifting trolley 106, and the two pairs of support wheels 107 are arranged symmetrically with the center line of the lifting trolley 106 as the symmetry axis, and the support wheels 107 are connected to the corresponding bridge frames 108. The four support wheels 107 can move inside the bridge frame 108, and the lifting A power assembly is provided inside the trolley 106, which can drive the four supporting wheels 107 to rotate forward and backward, thereby driving the lifting trolley 106 to move back and forth inside the bridge frame 108. The technology for driving the four supporting wheels 107 to rotate is existing technology and will not be described in detail here. Two connecting blocks 102 are provided on the outside of the two bridge frames 108. The two connecting blocks 102 are symmetrically arranged front to back with the center line of the lifting trolley 106 as the symmetry axis. The connecting blocks 102 can connect and support the two bridge frames 108. Multiple moving rollers 103 are provided on the outside of the connecting blocks 102. A motor is provided inside the connecting blocks 102. The motor can drive the moving roller 103 in the middle to rotate. A track 101 is provided at the bottom of the moving roller 103 on each side. When the moving roller 10 When the surface of the track 101 rotates, the two connecting blocks 102 can be driven to move left and right, thereby driving the two bridges 108 to move. The two tracks 101 are connected to the plant structure. The track 101 is connected to the steel structure or concrete structure of the plant to provide support for the entire device. A protective cover 105 is provided on the top of the lifting trolley 106. The protective cover 105 can protect the hoisting assembly and personnel. A hoisting assembly is provided inside the protective cover 105. A winding roller 204 is provided on the top of the hoisting assembly. A vertical plate 301 is provided on the rear side of the protective cover 105. A wire coiling assembly is provided on the rear side of the vertical plate 301. A guide cylinder 308 is provided on the rear side of the wire coiling assembly. A steel wire rope 207 is provided on the surface of the winding roller 204. The wire rope 207 passes through the guide cylinder 308, and the other end of the wire rope 207 is connected to the bottom of the lifting trolley 106. The winding assembly can drive the angle of the guide cylinder 308 to change. The change in the angle of the guide cylinder 308 changes the deflection direction of the wire rope 207, and cooperates with the rotation of the winding roller 204 to complete the uniform winding of the wire rope 207. The bottom of the wire rope 207 is provided with a lifting pulley 209, and the top of the wire rope 207 is fixedly connected to the surface of the winding roller 204. When the wire rope 207 is wound, the wire rope 207 will rise, and the bottom of the curve formed by the tail end of the wire rope 207 (the end connected to the bottom of the lifting trolley 106) and the end to be wound will gradually rise, driving the lifting pulley 209 to rise.A limit box 208 is provided on the outer side of the lifting pulley 209, and the lifting pulley 209 drives the rotationally connected limit box 208 to lift and lower. A hook 210 is provided at the bottom of the limit box 208 to reel in or unreel the wire rope 207 so as to adjust the height of the hook 210.

[0035] Two support plates 205 are provided on the outer side of the winding roller 204, and the two support plates 205 are arranged symmetrically with the radial center line of the winding roller 204 as the symmetry axis. A support shaft 206 is provided inside the winding roller 204, and both ends of the support shaft 206 are connected to the support plates 205, and both ends of the support shaft 206 are rotatably connected to the support plates 205, and the support plates 205 are fixed on the surface of the lifting trolley 106. The winch assembly includes a winding motor 201, and the bottom of the winding motor 201 is connected to the top of the lifting trolley 106, and the bottom of the winding motor 201 is fixedly connected to the top of the lifting trolley 106. The winding motor 201 requires an external power supply and a control module when running, so as to complete the forward and reverse rotation and speed adjustment of the winding motor 201. These are all existing technologies and will not be elaborated here.

[0036] A driving gear 202 is provided at the left end of the winding motor 201. The rotation of the winding motor 201 drives the driving gear 202 to rotate synchronously. The driving gear 202 is connected to the support plate 205. A driven gear 203 is meshed on the top of the driving gear 202. The driving gear 202 can drive the driven gear 203 to rotate. The diameter and the number of teeth of the driven gear 203 are greater than the diameter and the number of teeth of the driving gear 202, which can increase the torque when the driven gear 203 rotates. The left side of the driven gear 203 is connected to the winding roller 204. The slow rotation of the driven gear 203 can drive the winding roller 204 to rotate back and forth. The rotation of the winding roller 204 drives the steel wire rope 207 with one end fixed to be wound around the surface of the winding roller 204, thereby driving the steel wire rope 207 to move upward.

[0037] The wire coiling assembly includes an electric push rod 302, which can be freely extended and retracted. The electric push rod 302 is connected to the rear side of the vertical plate 301, and the electric push rod 302 is fixedly connected to the vertical plate 301. A slider 303 is provided on the right side of the electric push rod 302, and the slider 303 is slidably connected to the rear side of the vertical plate 301. A passive telescopic rod 305 is provided on the rear side of the slider 303, and a cylindrical rod 304 is provided at the bottom of the passive telescopic rod 305. The contraction of the electric push rod 302 can drive the slider 303 to move to the left, and during the movement, the top of the passive telescopic rod 305 will also move to the left. Since the position of the cylindrical rod 304 is fixed, the passive telescopic rod 305 will move with the leftward movement of the slider 303. During the movement, the position and distance between the slider 303 and the cylindrical rod 304 change. , thereby driving the passive telescopic rod 305 to retract, and at the same time, the angle of the passive telescopic rod 305 itself rotates. When the slider 303 and the cylindrical rod 304 are aligned with each other, the length of the cylindrical rod 304 is compressed to the shortest, and the cylindrical rod 304 is connected to the rear side of the vertical plate 301. A transmission rod 306 is provided on the top rear side of the passive telescopic rod 305. The passive telescopic rod 305 rotates while extending and retracting, and the transmission rod 306 is driven to rotate while rotating, thereby driving the connecting plate 307 to swing, and controlling the guide cylinder 308 to swing back and forth. A connecting plate 307 is provided on the rear side of the transmission rod 306, and the connecting plate 307 is connected to the guide cylinder 308. The guide cylinder 308 can swing back and forth once to wind the wire rope 207 on the surface of the winding roller 204, thereby completing the winding and unwinding of the wire rope 207. Embodiment 2:

[0038] On the basis of Example 1, this embodiment takes into account that when the device is picking up and placing goods, there will be a large deviation in the position adjustment of the hook 210, and it is necessary to manually pull the heavier hook 210 to move it to mount or remove the goods, resulting in a decrease in the efficiency of loading and unloading goods, and the wear state of the wire rope 207 cannot be identified during use.

[0039] Specifically, the bottom of the lifting trolley 106 is provided with a spreading component, and the bottom of the spreading component is provided with two sleeves 501, the sleeve 501 is hollow inside, and the two sleeves 501 are symmetrically arranged front and back with the center line of the lifting trolley 106 as the symmetry axis, and the sleeve 501 is provided with an adjustment component inside, and the bottom of the adjustment component is provided with a frame 506, and the adjustment component can adjust the telescopic distance of the frame 506, and the frame 506 is provided with a supporting pulley 507 inside, and the wire rope 207 is rotatably connected to the frame 506, and the supporting pulley 507 and the wire rope 207 are in conflict with each other, and the supporting pulley 507 can contact with the wire rope 207, and the supporting pulley 507 will rotate during the movement of the wire rope 207, thereby reducing the wear on the wire rope 207.

[0040] The expansion assembly includes a hydraulic telescopic rod 405, which can freely control the telescopic distance. A rectangular block 406 is provided at the bottom of the hydraulic telescopic rod 405. The extension of the hydraulic telescopic rod 405 can drive the fixedly connected rectangular block 406 to move downward. The left side of the rectangular block 406 is connected to the sleeve 501, and the sleeve 501 is rotatably connected to the rectangular block 406. A connecting rod 404 is provided on the left side of the sleeve 501. The connecting rod 404 is fixedly connected to the sleeve 501. A pin 403 is provided on the outer side of the connecting rod 404. The pin 403 is fixedly connected to the connecting rod 404. A fixed block 401 is provided on the left side of the pin 403. The top of the fixed block 401 is connected to the bottom of the lifting trolley 106. Two grooves 404 are provided inside the fixed block 401. 2. The two grooves 402 are arranged symmetrically front to back with the center line of the fixed block 401 as the symmetry axis. The grooves 402 are connected to the pin rod 403. The fixed block 401 is fixed and the pin rod 403 can slide inside the groove 402. When the hydraulic telescopic rod 405 is extended, the rectangular block 406 is driven to descend, and the top of the sleeve 501 is driven to move downward. Since the position of the fixed block 401 is fixed, the pin rod 403 is constrained to slide inside the groove 402. As the sleeve 501 and the connecting rod 404 descend, the pin rod 403 drives the connecting rod 404 to rotate outward at the same time, and the two sleeves 501 expand outward at the same time. Conversely, when the hydraulic telescopic rod 405 is contracted, the two sleeves 501 are driven to gather inward synchronously.

[0041] The adjustment component includes a fixed magnet plate 502, the magnetic force and magnetic pole of the fixed magnet plate 502 will not change, the fixed magnet plate 502 and the sleeve 501 are connected to each other, and a spring 503 is provided at the bottom of the fixed magnet plate 502. The initial state of the spring 503 is as follows: Fig.10As shown, at this time, the electromagnet plate 504 does not generate magnetic force. The other end of the spring 503 is provided with an electromagnet plate 504. The electromagnet plate 504 is composed of an electromagnetic control module, an electromagnetic control coil and an iron plate. The one-piece molding meets the demand for miniaturization. When the electromagnet plate 504 generates a magnetic force with the same magnetic pole as the fixed magnet plate 502, it will push the electromagnet plate 504 to move downward in the sleeve 501. Conversely, when the electromagnet plate 504 generates a magnetic force with the opposite magnetic pole to the fixed magnet plate 502, it will drive the electromagnet plate 504 to squeeze the spring 503 and move upward at the same time. A straight rod 505 is provided at the bottom of the electromagnet plate 504. The reciprocating movement of the electromagnet plate 504 can drive the straight rod 505 to move synchronously. The bottom of the straight rod 505 is connected to the frame 506. The straight rod 505 drives the frame 506 to move, thereby realizing the position movement of the support pulley 507 and the adjustment of the tension of the wire rope 207. The elongation of the straight rod 505 on one side can also be adjusted separately. An air pressure sensor is provided at the bottom of the fixed magnet plate 502. The interior of the sleeve 501 is a closed space. The air pressure sensor is very small and can monitor the gas pressure inside the sleeve 501. When the position of the electromagnet plate 504 changes, the size of the cavity between the electromagnet plate 504 and the fixed magnet plate 502 will change. If the electromagnet plate 504 is away from the fixed magnet plate 502, the cavity becomes larger and the internal air pressure decreases. In other words, the distance moved by the electromagnet plate 504 can be obtained by the change of the air pressure inside the sleeve 501.

[0042] Two swinging rods 508 are arranged on the outside of the lifting trolley 106, and the swinging rods 508 are rotatably connected to the lifting trolley 106. The two swinging rods 508 are arranged symmetrically front and back with the center line of the lifting trolley 106 as the symmetry axis. A driven rod 509 is arranged on the outside of the middle of the swinging rod 508. When the hydraulic telescopic rod 405 is extended, the two sleeves 501 and the straight rod 505 are driven to swing outward, and the two straight rods 505 begin to open outward. When the opening angle is large, they will contact the corresponding swinging rod 508, thereby pushing the swinging rods 508 on both sides to move forward at the same time. The driven rods 509 on both sides rotate upward and then contact the bottom of the bridge frame 108, and the position of the lifting trolley 106 is fixed by the friction between the driven rods 509 and the bridge frame 108. At the same time, the steel wire rope 207 can be squeezed and fixed due to the mutual squeezing of the supporting pulley 507 and the swinging rod 508, and the two straight rods 505 drive the supporting pulley 507 to open, thereby increasing the distance between the two supporting pulleys 507, making the entire steel wire rope 207 tighter, and reducing the shaking of the steel wire rope 207 and the hook 210.

[0043] In use: when it is necessary to hoist the cargo, firstly control the winding roller 204 to rotate, release the wire rope 207 wound on the surface of the winding roller 204, and lower the height of the hook 210. By moving the bridge 108 left and right and the lifting trolley 106 forward and backward, the position of the hook 210 is adjusted. When the hook 210 is lowered to a predetermined height, Figure 4 In the state shown, if the height of the hook 210 is too high, it is necessary to fine-tune the position of the hook 210. At this time, the hydraulic telescopic rod 405 is controlled to extend to realize the outward rotation of the two sleeves 501. At the same time, the electromagnet plate 504 inside the sleeve 501 generates a magnetic force with the same magnetic pole as the fixed magnet plate 502, pushing the two straight rods 505 to extend outward at the same time. Since the winch assembly is no longer running at this time, the length of the wire rope 207 remains unchanged. As the two supporting pulleys 507 expand outward, the two sides of the wire rope 207 can be stretched open. When the two sides of the wire rope 207 begin to move outward, the shape of the wire rope 207 will change, and the lowest point of the curve formed by the wire rope 207 (that is, what we called the "bottom" or "midpoint" before) will gradually rise with the movement of the two ends. Otherwise, the hydraulic telescopic rod 405 is controlled to retract upward, driving the two supporting pulleys 507 to move inward, reducing the stretching of the wire rope 207, and causing the height of the hook 210 to drop. If before lifting, When there is a certain deviation between the front and rear positions of the hook 210, assuming that the position of the hook 210 is forward at this time, it is necessary to fine-tune the position of the hook 210 backward. At this time, the electromagnet plate 504 on the right side is controlled to generate a larger magnetic force, pushing the straight rod 505 and the support pulley 507 to move backward, driving the steel wire rope 207 on the rear side to move backward. At the same time, the electromagnet plate 504 on the front side reduces its own magnetic force, so that the front support pulley 507 moves backward, and the steel wire rope 207 on the front side also moves backward. The wire rope 207 can be moved sideways to make the curve formed by the wire rope 207 move backward as a whole, and the lowest point of the curve moves backward, so that the position of the hook 210 can be fine-tuned. Conversely, the hook 210 can be moved forward. The secondary fine-tuning of the height of the hook 210 can be completed by the cooperation of the expansion component and the adjustment component, and the front and rear positions of the hook 210 can be fine-tuned for the second time by the separate control of the adjustment component, so as to realize the precise positioning of the hook 210, speed up the lifting efficiency, and reduce the burden on the workers.

[0044] During the rising process of the hook 210, the winch assembly pulls the wire rope 207 upward, controls the hydraulic telescopic rod 405 to extend, and drives the two sleeves 501, the straight rod 505 and the supporting pulley 507 to expand outward at the same time, which can increase the distance between the wire ropes 207 and drive the lowest point of the curve formed by the wire rope 207 to move upward, thereby accelerating the speed of moving the goods up. At the same time, in the process of the two supporting pulleys 507 expanding, the tension of the wire rope 207 can be increased, making the wire rope 207 tighter during the movement, reducing the shaking of the hook 210, maintaining the stable and rapid lifting of the hook 210, and reducing the operating pressure of the winch assembly.

[0045] During the descent of the hook 210, when the cargo is about to touch the bottom, the hydraulic telescopic rod 405 is controlled to extend, driving the two sleeves 501 to rotate outward at the same time, and the magnetic force of the electromagnet plates 504 on both sides increases, controlling the support pulleys 507 on both sides to move outward, realizing the long-distance outward movement of the support pulleys 507 on both sides, and greatly expanding the wire rope 207. In this process, it is equivalent to driving the hook 210 to rise. Since the length of the wire rope 207 continues to increase during this process, the natural falling distance of the hook 210 is greater than the rising distance of the support pulley 507 after it is expanded. At this time, it means that the distance compensation is performed before the cargo is about to touch the bottom, which slows down the speed of the cargo when it touches the bottom, and prevents the cargo from being damaged due to excessive speed when touching the bottom.

[0046] During the cargo lifting process, the support pulley 507 is always in contact with the wire rope 207. Figure 4 As shown, at this time, the electromagnet plate 504 does not generate magnetic force, and the steel wire ropes 207 on both sides are supported by the elastic force of the spring 503. During operation, as the steel wire rope 207 is wound or unwound, the steel wire rope 207 will contact the supporting pulley 507 in turn. If the surface of the steel wire rope 207 is broken or dented, the position of the supporting pulley 507 will jump under the action of the spring 503 when the section of the steel wire rope 207 passes through the supporting pulley 507 on the rear side. At this moment, the air pressure inside the sleeve 501 will change. The air pressure sensor can capture this moment, and the running time of the winch assembly can be used to determine which section of the steel wire rope 207 is damaged. Then, the steel wire rope 207 of this section can be repaired in a targeted manner, and at the same time, the hydraulic telescopic rod 405 can be controlled to shrink, driving the supporting pulleys 507 on both sides to shrink inward, thereby reducing the tension of the supporting pulley 507 on the steel wire ropes 207 on both sides.

[0047] During the cargo lifting process, if the air pressure sensor on one side suddenly detects that the air pressure inside the sleeve 501 has dropped instantly, it indicates that the wire rope 207 on that side has broken. Under the action of the spring 503, the electromagnet plate 504 is quickly pushed downward. At this time, it is necessary to quickly control the hydraulic telescopic rod 405 to extend, drive the two sleeves 501 to rotate outward, and at the same time control the electromagnet plates 504 on both sides to generate the same magnetic force as the fixed magnet plate 502. The electromagnet plates 504 drive the straight rod 505 to extend outward at an accelerated speed, drive the support pulley 507 to swing outward, thereby pushing the swing rods 508 on both sides to rotate upward, and drive the two driven rods 509 to quickly contact the bottom of the bridge 108, to prevent the wire rope 207 from breaking instantly and generating unilateral inertia to push the lifting trolley 106 to move quickly and cause a collision accident, which can effectively ensure the safety of the lifting trolley 106.

[0048] It should be noted that the secondary fine-tuning of the height of the hook 210 can be completed through the cooperation of the expansion assembly and the adjustment assembly, and the front and rear positions of the hook 210 can also be fine-tuned for the second time through the separate control of the adjustment assembly, so as to realize the precise positioning of the position of the hook 210, speed up the lifting efficiency, and reduce the burden on the workers. In the process of the rising of the hook 210, the expansion assembly and the adjustment assembly are coordinated to realize the acceleration of the upward movement of the goods. At the same time, in the process of the expansion of the two supporting pulleys 507, the tension of the wire rope 207 can be increased to make the wire rope 207 tighter during the movement, reduce the shaking of the hook 210, maintain the stable and rapid lifting of the hook 210, and reduce the operating pressure of the winch assembly. In the process of the descent of the hook 210, when the goods are about to touch the bottom, the descent distance before the goods touch the bottom can be realized by controlling the cooperation of the expansion assembly and the adjustment assembly. The compensation for the distance slows down the speed of the goods when they touch the bottom, and prevents the goods from being damaged due to the excessive speed when they touch the bottom. During the cargo lifting process, the state of the wire rope 207 can be identified through the adjustment component, and the abnormal position of the wire rope 207 can be identified through the cooperation of the adjustment component and the winch component. At the same time, the operation of the support component is controlled to reduce the tension of the support pulley 507 on the wire ropes 207 on both sides, and then the wire rope 207 is quickly repaired. In the process of cargo lifting, if the adjustment component identifies that the wire rope 207 is broken, the support component is quickly controlled to cooperate with the adjustment component to drive the driven rods 509 on both sides to quickly contact the bottom of the bridge frame 108, fix the position of the lifting trolley 106, and prevent the wire rope 207 from breaking instantly and generating unilateral inertia to push the lifting trolley 106 to move quickly and cause a collision accident.

[0049] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A lifting mechanism for a bridge crane, characterized in that: The invention comprises a lifting trolley (106), wherein the outer side of the lifting trolley (106) is matched with two bridge frames (108), the two bridge frames (108) are arranged symmetrically in left and right manner with the center line of the lifting trolley (106) as the symmetry axis, two connecting blocks (102) are arranged in front and back symmetry with the center line of the lifting trolley (106) as the symmetry axis, the outer side of the connecting blocks (102) are each provided with a plurality of moving rollers (103), the bottom of each side of the moving roller (103) is provided with a track (101), the two tracks (101) are connected to the plant structure, and the top of the lifting trolley (106) is provided with a protective cover (105), the protective cover ( 105) is provided with a winch assembly inside, a winding roller (204) is provided on the top of the winch assembly, a vertical plate (301) is provided on the rear side of the protective cover (105), a wire coiling assembly is provided on the rear side of the vertical plate (301), a guide cylinder (308) is provided on the rear side of the wire coiling assembly, a steel wire rope (207) is provided on the surface of the winding roller (204), the steel wire rope (207) passes through the guide cylinder (308), the other end of the steel wire rope (207) is connected to the bottom of the lifting trolley (106), a lifting pulley (209) is provided at the bottom of the steel wire rope (207), a limit box (208) is provided on the outer side of the lifting pulley (209), and a hook (210) is provided at the bottom of the limit box (208); The bottom of the lifting trolley (106) is provided with an expansion component, and the bottom of the expansion component is provided with two sleeves (501), and the two sleeves (501) are symmetrically arranged front to back with the center line of the lifting trolley (106) as the symmetry axis, and the inside of the sleeve (501) is provided with an adjustment component, and the bottom of the adjustment component is provided with a frame (506), and the inside of the frame (506) is provided with a support pulley (507), and the support pulley (507) and the wire rope (207) are in conflict with each other.

2. A bridge crane lifting mechanism according to claim 1, characterized in that: Two support plates (205) are provided on the outside of the winding roller (204), and the two support plates (205) are arranged symmetrically with the radial center line of the winding roller (204) as the symmetry axis. A support shaft (206) is provided inside the winding roller (204), and both ends of the support shaft (206) are interconnected with the support plates (205). The hoisting assembly includes a winding motor (201), and the bottom of the winding motor (201) is interconnected with the top of the lifting trolley (106).

3. A bridge crane lifting mechanism according to claim 2, characterized in that: A driving gear (202) is provided at the left end of the winding motor (201), the driving gear (202) and the support plate (205) are connected to each other, a driven gear (203) is meshed at the top of the driving gear (202), and the left side of the driven gear (203) is connected to the winding roller (204).

4. The lifting mechanism of a bridge crane according to claim 1, characterized in that: The cable winding assembly comprises an electric push rod (302), the electric push rod (302) being connected to the rear side of the vertical plate (301), a slider (303) being provided on the right side of the electric push rod (302), the slider (303) being slidably connected to the rear side of the vertical plate (301), and a passive telescopic rod (305) being provided on the rear side of the slider (303).

5. A bridge crane lifting mechanism according to claim 4, characterized in that: A cylindrical rod (304) is provided at the bottom of the passive telescopic rod (305), and the cylindrical rod (304) is connected to the rear side of the vertical plate (301). A transmission rod (306) is provided at the rear side of the top of the passive telescopic rod (305), and a connecting plate (307) is provided at the rear side of the transmission rod (306), and the connecting plate (307) is connected to the guide cylinder (308).

6. The lifting mechanism of a bridge crane according to claim 1, characterized in that: The expansion assembly comprises a hydraulic telescopic rod (405), a rectangular block (406) is provided at the bottom of the hydraulic telescopic rod (405), the left side of the rectangular block (406) is connected to the sleeve (501), and a connecting rod (404) is provided on the left side of the sleeve (501).

7. A lifting mechanism for a bridge crane according to claim 6, characterized in that: A pin rod (403) is provided on the outer side of the connecting rod (404), a fixed block (401) is provided on the left side of the pin rod (403), the top of the fixed block (401) is connected to the bottom of the lifting trolley (106), and two grooves (402) are provided inside the fixed block (401). The two grooves (402) are symmetrically arranged front to back with the center line of the fixed block (401) as the symmetry axis, and the grooves (402) and the pin rod (403) are connected to each other.

8. The lifting mechanism of a bridge crane according to claim 1, characterized in that: The adjustment component comprises a fixed magnet plate (502), the fixed magnet plate (502) and the sleeve (501) are connected to each other, a spring (503) is provided at the bottom of the fixed magnet plate (502), an electromagnet plate (504) is provided at the other end of the spring (503), a straight rod (505) is provided at the bottom of the electromagnet plate (504), the bottom of the straight rod (505) is connected to a frame (506), and an air pressure sensor is provided at the bottom of the fixed magnet plate (502).

9. The lifting mechanism of a bridge crane according to claim 1, characterized in that: Two swing rods (508) are provided on the outside of the lifting trolley (106), and the two swing rods (508) are symmetrically arranged front to back with the center line of the lifting trolley (106) as the symmetry axis. A driven rod (509) is provided on the outside of the middle part of each swing rod (508).

10. The lifting mechanism of a bridge crane according to claim 1, characterized in that: A guardrail (104) is provided on the top of the bridge frame (108), and two pairs of support wheels (107) are provided on the outer side of the lifting trolley (106). The two pairs of support wheels (107) are arranged symmetrically with the center line of the lifting trolley (106) as the axis of symmetry, and the support wheels (107) are connected to the corresponding bridge frame (108).

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