A chain bridge crane

Abstract

A chain bridge crane comprises two upper end beams, two parallel and spaced main beams are provided between the two upper end beams, the ends of the two main beams are detachably fixed to the top ends of the upper end beams, the upper end beams are movably assembled on a trolley travel track, the top ends of the main beams are equipped with a lifting trolley, the lifting trolley is provided with a lifting mechanism and a cable reeling device, a crane hook is provided below the lifting mechanism, the trolley travel mechanism comprises trolley travel wheels, the trolley travel wheels are rotatably assembled on the two ends of the upper end beams, a gear column is provided between the two upper end beams, the two ends of the gear column are transmission connected to the trolley travel wheels, the lifting mechanism comprises a lifting drum, and the lifting trolleys at both ends of the lifting drum are provided with lifting motors, the two lifting motors are symmetrically arranged, and the power output shafts of the two lifting motors are transmission connected to the lifting drum. The present invention has a simple structure, is suitable for production workshops with high precision requirements, and is easy to use.

Description

Technical Field

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

[0002] A crane is a multi-action lifting machine that can lift heavy objects vertically and move them horizontally within a certain range. It is also called an overhead crane, overhead crane, or crane. Lifting equipment is divided into gantry cranes, bridge cranes, beam cranes, and jib cranes according to their equipment structure. Bridge cranes are lifting equipment that are horizontally mounted above workshops, warehouses, and material yards to lift materials. Their two ends are generally located on tall concrete columns or metal supports, and their bridges run longitudinally along the trolley tracks laid on the elevated structures on both sides. By utilizing the space under the bridge to lift materials, it can also be unobstructed by ground equipment. Therefore, it is the most widely used and most numerous type of lifting machinery. Most bridge cranes include a crane main beam, a trolley travel mechanism assembled on the main beam, a lifting trolley installed on the top of the main beam, and a lifting mechanism installed on the lifting trolley. Existing bridge cranes have the following problems:

[0003] 1. Due to the large span of the bridge crane, the trolley travel mechanisms on both sides have different displacements due to inertia during operation, which can easily cause rail gnawing. If the rail gnawing is serious, it will cause the trolley travel motor to overload and damage the trolley travel motor, thus affecting the work progress;

[0004] 2. On the other hand, the lifting mechanism of the crane trolley is generally a wire rope wound around a drum, and the wire rope is used to pull the sling to lift the heavy object. Since the wire rope can easily detach from the wire rope groove of the lifting drum, it causes the wire rope to wear and even break, causing an accident.

[0005] 3. Since the crane hoist needs to be powered, the power supply cable is prone to collide with the wire rope or even get entangled with the wire rope, causing the power supply cable to be damaged or even broken, resulting in an accident.

[0006] Therefore, due to its large span, the existing bridge crane is prone to rail gnawing. The steel rope of the lifting mechanism is easy to slip out of the drum during lifting, causing the steel rope to frequently derail and break, making the bridge crane unusable. In addition, the power supply cable of the existing bridge crane is also easily broken, causing power supply failure. Summary of the Invention

[0007] In order to solve the technical problems that existing bridge cranes are prone to rail gnawing and wire ropes and power supply cables are easily broken, the present invention provides a chain bridge crane, including a crane beam frame, the crane beam frame includes two parallel and spaced upper end beams, two parallel and spaced main beams are arranged between the two upper end beams, the top ends of the main beams are paved with trolley running tracks arranged parallel to the main beams, and both the upper end beams and the main beams play a supporting role. The ends of the two main beams are detachably fixed to the top ends of the upper end beams, and the upper end beams can be movably assembled on the trolley running tracks through a trolley running mechanism, and the trolley running mechanism can drive the crane beam frame to move freely longitudinally along the trolley running tracks. A lifting trolley is movably installed on the top of the main beam, and the lifting trolley is provided with a trolley traveling mechanism, which is installed on the trolley traveling track at the top of the main beam. The trolley traveling mechanism can drive the crane trolley to move freely along the trolley traveling track. The trolley traveling mechanism includes a trolley traveling motor and trolley traveling wheels installed on the lifting trolley, and the power output shaft of the trolley traveling motor is transmission-connected to the trolley traveling wheels. The lifting trolley is provided with a lifting mechanism and a cable retracting and releasing device, and a crane hook is provided under the lifting mechanism, and the crane hook is connected to the lifting mechanism through a chain.

[0008] The trolley traveling mechanism includes trolley traveling wheels, which are rotatably assembled at the two ends of the upper end beam. A gear column arranged parallel to the main beam is provided between the two upper end beams, and the gear column is provided with transmission teeth. The two ends of the gear column are transmission connected to the trolley traveling wheels on the upper end beam. The trolley traveling mechanism also includes a support frame fixed on the lifting trolley, and several groups of trolley power mechanisms are fixed on the top of the support frame. The trolley power mechanism is transmission connected to the gear column. The trolley power mechanism can drive the gear column to rotate, and then drive the trolley traveling wheels to rotate.

[0009] The trolley power mechanism is provided in two groups and is symmetrically arranged. The trolley power mechanism includes a vertically arranged trolley travel motor. A first bevel gear is fixed to the power output shaft of the trolley travel motor. The first bevel gear is vertically arranged. The lower end of the support frame is rotatably equipped with a horizontally arranged transmission shaft. A second bevel gear and a first gear are fixed to the transmission shaft. The first bevel gear and the second bevel gear are meshed with each other. The first gear is meshed with the gear column. The trolley power mechanism drives the first bevel gear to rotate. The first bevel gear transmits power to the second bevel gear, and then the first gear on the transmission shaft transmits power to the gear column. The trolley travel wheel includes a support part, which is roller-fitted with the trolley travel track. A horizontally arranged support shaft is fixed to both ends of the support part. The support shaft is rotatably assembled on the upper end beam through a wheel bearing assembly. A gear part is provided at one end of the support part. The gear part and the support part are coaxially arranged. The outer diameter of the gear part is larger than the diameter of the support part to avoid derailment. A horizontal support rod is rotatably connected to the upper beam above the trolley's travel wheels via a support rod bearing. One end of the support rod is detachably fixedly connected to the gear column coaxially. A second gear is fixed to the support rod, meshing with the gear portion of the trolley's travel wheels. A gear rack is fixed to the main beam below the gear column, providing support. One end of the gear rack extends below the gear column, and a third gear is rotatably mounted on the gear rack. The upper end of the third gear meshes with the gear column. The third gear is located directly below the center of the gear column, increasing its stability and reducing its deformation.

[0010] The lifting mechanism includes a horizontally arranged lifting drum, both ends of which can be rotatably assembled on the lifting trolley. A chain slot for assembling a chain is provided on the lifting drum. The upper end of the chain is assembled in the chain slot, and the lower end of the chain can be removably fixed to the crane hook. Lifting motors are provided on the lifting trolleys at both ends of the lifting drum. The two lifting motors are symmetrically arranged, and the power output shafts of the two lifting motors are transmission-connected to the lifting drum. The lifting motor drives the lifting drum to rotate, and the lifting drum pulls the chain up or down, thereby adjusting the height of the crane sling.

[0011] The cable retraction and release device includes a vertically arranged protective shell, the cross-section of the protective shell is rectangular, the upper end of the protective shell is detachably fixed to the lifting trolley, the upper end of the protective shell extends upward to above the lifting drum, and the bottom end of the protective shell extends downward to below the lifting trolley, and a fixed pulley group is rotatably installed inside the top of the protective shell, and a plurality of fixed pulleys are provided on the fixed pulley group, and a movable pulley group corresponding to the fixed pulley group is provided in the protective shell below the fixed pulley group, a cable is wound between the movable pulley group and the fixed pulley group, and the movable pulley group moves vertically upward to release the cable; when the cable needs to be retracted, the movable pulley group moves vertically downward under the action of its own gravity, and the cable is wound between the movable pulley group and the fixed pulley group, and the cable is retracted and released by raising and lowering the movable pulley group. The top of the protective housing is equipped with several guide wheel brackets, on which guide wheels and crimping wheels are rotatably mounted. The guide wheels and crimping wheels are parallel and spaced apart. The cable passes between the guide wheels and crimping wheels and is wrapped around the guide wheels. The guide wheels guide the cable, and the crimping wheels prevent the cable from jumping out of the guide wheels, thus protecting the cable. The protective housing of the cable retracting device is equipped with two vertically mounted slide rails. The two slide rails are respectively fixed to either side of the movable pulley block, and sliders are fixed on both sides of the movable pulley block. The sliders are slidably mounted on the slide rails. The slide rails guide the movable pulley block, reducing the shaking of the movable pulley block, thereby reducing the traction force on the cable and increasing the service life of the cable.

[0012] The crane hook includes a vertically mounted hook support tube, which is hollow inside and has its upper end removably fixed to a chain. A lower support platform is removably fixed to the lower end of the hook support tube. A horizontally mounted upper support platform is located above the lower support platform. A plurality of evenly spaced support plates are located between the upper and lower support platforms. The upper support platform is fixed to the lower support platform via the support plates. A vertically mounted rotating motor is fixed to the top of the upper support platform, and the rotating motor is connected to the cable of the cable retracting device. A connector is rotatably mounted on the top of the lower support platform via a support bearing. The connector serves as a connection. The upper end of the connector is connected to the power output shaft of the rotating motor via a coupling. A vertically mounted connecting plate is located below the lower support platform. The upper end of the connecting plate has a fixing portion. The upper end of the connecting plate extends upward from the lower support platform and is removably fixed to the connecting plate via a pin. The lower end of the connecting plate is removably fixed to the hook via a flange. When the rotating motor is started, the rotating motor drives the connecting plate to rotate via the connector, thereby achieving rotational adjustment of the hook.

[0013] A sling diverter is provided between the connecting plate and the hook. The setting of the sling diverter is convenient for adjusting the angle of the hook. The sling diverter includes a vertically arranged support column. A vertically arranged rectangular through hole is provided on the support column, and the through hole at the top of the support column is chamfered to facilitate the positioning and plugging of the connecting plate. The connecting plate can be inserted into the through hole on the support column, and a horizontally arranged fixing hole is provided on the side of the support column. A fixing hole corresponding to the fixing hole on the support column is provided on the connecting plate. The support column is fixedly connected to the connecting plate through a pin shaft. When the angle of the hook needs to be adjusted, pull out the pin shaft, rotate the hook and the support column 180°, insert the connecting plate into the through hole on the support column, and then pass the pin shaft through the fixing holes of the connecting plate and the support column. A handle is fixed to one end of the pin shaft, and a pin shaft fixing chain is connected to the handle. The other end of the pin shaft fixing chain is fixed to the support column. The setting of the handle facilitates the removal of the pin shaft. An L-shaped baffle is provided at the lower end of the support column. The setting of the baffle can reduce the rotation of the pin shaft. A flange is fixed to the bottom end of the support column. The support column is detachably fixed to the hook through the flange. An anti-unhooking part is provided on the hook. The setting of the anti-unhooking part can prevent the heavy object from being unhooked when the hook lifts the heavy object, thereby enhancing safety.

[0014] The crane trolley is provided with a junction box, which includes a base that serves as a fixation, and several junction box bodies are fixed on the top of the base. Support legs are provided at the four corners of the bottom of the junction box body, and fixing holes are provided on the support legs. The junction box body can be detachably fixed to the base by fixing bolts, and locks are rotatably connected on both sides of the junction box body. The two locks are symmetrically arranged, and a handle is fixed between the two locks. A protective cover is provided above the junction box, and fixing columns corresponding to the locks are fixed on both sides of the protective cover. A wire outlet hole is provided on one side of the protective cover, and an aviation connector is assembled in the wire outlet hole. An inlet hole is provided at the bottom of the base, and a vertically arranged card block is provided on the side wall of the junction box body, and a card slot corresponding to the card block is provided in the protective cover. The arrangement of the card block and the card slot facilitates the positioning of the protective cover, and facilitates the buckling of the protective cover on the junction box body. The junction box is arranged in a buckling manner, which facilitates the disassembly of the junction box and the opening of the junction box by maintenance personnel; reinforcement plates are provided on both sides of the base to improve the strength of the base.

[0015] A vertically arranged wire rack is fixed on the upper end beam on the left side of the main beam, and a trolley chain track parallel to the upper end beam is provided on one side of the wire rack. The upper end of the trolley chain track is open, and two L-shaped support slats are provided in the trolley chain track, and the support slats are fixed on the inner wall of the trolley chain track, and there is a gap between the two support slats. A trolley chain is provided on the support slats, and the setting of the support slats supports the trolley chain, increases the contact area between the trolley chain and the air, and increases the heat dissipation speed. One end of the trolley chain is fixed to the wire rack, and a trolley chain track is fixed on one side of the main beam, and a trolley chain is provided in the trolley chain track. The existing trolley power supply generally adopts a conductive slider, and a power supply track is set above the steel structure workshop building, and the bridge crane is powered by the conductive slider. This power supply method is relatively dangerous, and in order to meet the power supply needs, the conductive slider needs to be cleaned and replaced frequently. Powering the bridge crane through the trolley chain track enhances safety and improves work efficiency.

[0016] Both ends of the lifting trolley are provided with an anti-hook device, which includes a first support block and a second support block. The first support block and the second support block are respectively fixed on the crane trolley, and the first support block is rotatably connected to the first arm through a hinge shaft, and the second support block is rotatably connected to the second arm through a hinge shaft. The first arm and the second arm are symmetrically arranged, and the bottom ends of the first arm and the second arm are provided with an L-shaped hook portion, and the top ends of the first arm and the second arm are provided with an adjusting rod, which extends to the top of the lifting trolley. A vertically arranged fixing bracket is fixed on the lifting trolley, and the fixing bracket is provided with several assembly holes for fixing the adjusting rod. Multiple assembly holes are provided to adjust the distance between the hook portion and the main beam, which can be suitable for main beams of different specifications. The various assembly holes are arranged in sequence from top to bottom. The setting of the anti-hook device can prevent the lifting trolley from derailing and enhance safety performance.

[0017] Preferably, a hoisting frame for lifting the lifting trolley is provided above the lifting mechanism, the four corners of the bottom end of the hoisting frame are fixed on the lifting trolley, the hoisting frame is a dome-shaped frame, and the top end of the hoisting frame is provided with a hoisting hole for hoisting.

[0018] Preferably, a cable-releasing hole is provided at the bottom end of the protective shell of the cable retracting device, and a camera bracket is detachably fixed to the bottom end of the protective shell, on which a camera is mounted.

[0019] Preferably, the chain bridge crane is made of stainless steel and has radiation resistance.

[0020] The above solution has the following advantages:

[0021] The trolley travel mechanism uses a gear column parallel to the main beam to connect the trolley travel wheels on the two upper ends to achieve synchronous transmission, reducing the displacement difference caused by the different displacements of the trolley travel wheels on the two upper ends of the bridge crane, reducing the probability of the trolley travel wheels and the trolley travel track gnawing, enhancing the smooth operation of the trolley travel mechanism, reducing workers' maintenance time, and improving work efficiency;

[0022] The setting of the lifting mechanism and the assembly of the lifting drum and chain replace the traditional winding of wire rope and lifting drum, which reduces the occurrence of wire rope breakage caused by wire rope jumping. At the same time, because the chain and the crane hook are always in a straight line, the lifting height accuracy is enhanced compared with the winding of wire rope around the lifting drum.

[0023] The cable retracting and releasing device is set up. When the cable needs to be released, the movable pulley group moves vertically upward under the traction of the cable to release the cable. When the cable needs to be retracted, the movable pulley group moves vertically downward under the action of its own gravity. The cable is wound between the movable pulley group and the fixed pulley group. The cable is retracted and released by raising and lowering the movable pulley group, which is convenient to use.

[0024] The setting of the crane hook drives the hook to rotate by rotating the crane, realizing the angle adjustment of the hook. Compared with the existing rotary spreader, the structure is more compact and lightweight, reducing its own weight. The spreader diverter set on the crane hook facilitates the hook to be turned and is easy to assemble.

[0025] The junction box is set up in a snap-fit ​​manner, which makes it easy to disassemble the junction box and facilitate maintenance personnel to open the junction box;

[0026] The setting of the anti-hook device can prevent the lifting trolley from derailing and enhance safety performance.

[0027] With the setting of the lifting frame, the lifting trolley can be directly lifted by the lifting equipment during disassembly and assembly, so that the lifting trolley can be directly separated from the bridge and power supply, and can be installed in reverse to achieve rapid disassembly, assembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the three-dimensional structure of the present invention Figure 1 ;

[0029] Figure 2 Schematic diagram of the three-dimensional structure of the present invention Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the main structure of the present invention;

[0031] Figure 4 It is a left-side structural schematic diagram of the present invention;

[0032] Figure 5 It is a schematic diagram of the top view of the structure of the present invention;

[0033] Figure 6 This is a structural diagram of the trolley's traveling mechanism;

[0034] Figure 7 for Figure 6 A magnified view of part B;

[0035] Figure 8 for Figure 2 A magnified view of part A;

[0036] Figure 9 This is a schematic diagram of the main structure of the cable reeling and unreeling device;

[0037] Figure 10 It is a left-side structural schematic diagram of the cable retracting and releasing device;

[0038] Figure 11 for Figure 10 AA cross-sectional structural diagram;

[0039] Figure 12 This is a schematic diagram of the main structure of the crane hook;

[0040] Figure 13 for Figure 12 BB-section structural diagram;

[0041] Figure 14 This is a schematic diagram of the three-dimensional structure of a crane hook;

[0042] Figure 15 It is a structural diagram of the spreader commutator;

[0043] Figure 16 Schematic diagram of the structure of the connecting plate and the pin;

[0044] Figure 17 Schematic diagram of the three-dimensional structure of the junction box Figure 1 ;

[0045] Figure 18 Schematic diagram of the three-dimensional structure of the junction box Figure 2 ;

[0046] Figure 19 This is a schematic diagram of the exploded structure of the junction box;

[0047] Figure 20 It is a schematic diagram of the three-dimensional structure of the anti-hook device;

[0048] Figure 21 This is a schematic diagram of the assembly between the anti-hook device and the main beam.

[0049] Reference numerals: 1, crane beam; 2, trolley travel mechanism; 3, lifting trolley; 4, lifting mechanism; 5, cable retracting and releasing device; 6, crane hook; 7, spreader reversing device; 8, junction box; 9, wire rack; 10, anti-hook device; 11, main beam; 111, trolley travel track; 12, upper end beam; 13, trolley travel track; 21, trolley travel wheel; 211, support part; 212, support shaft; 213, wheel bearing assembly; 214, gear part; 215, support rod bearing; 216, support rod; 217, second gear; 22, gear column; 23. Support frame; 24. Trolley power mechanism; 241. Trolley travel motor; 242. First bevel gear; 243. Drive shaft; 244. First gear; 245. Second bevel gear; 25. Third gear; 251. Gear rack; 26. Camera; 261. Camera bracket; 31. Trolley travel mechanism; 32. Lifting frame; 33. Lifting hole; 41. Lifting drum; 42. Chain; 43. Lifting motor; 51. Protective housing; 52. Fixed pulley block; 53. Movable pulley block; 54. Cable; 55. Guide wheel bracket; 551. Guide wheel; 552 , wire pressing wheel; 56, slide rail; 561, slider; 61, hook support tube; 62, lower support platform; 621, upper support platform; 622, support plate; 63, rotating motor; 64, connector; 641, coupling; 642, pin; 643, support bearing; 65, connecting plate; 651, fixing part; 66, hook; 661, flange; 662, anti-hook part; 71, support column; 711, chamfer; 72, pin; 721, pin fixing chain; 722, fixing hole; 73, handle; 74, baffle; 81, base; 811, wire inlet hole; 8 2. Junction box body; 821. Lock; 822. Handle; 823. Support foot; 83. Protective cover; 831. Fixed column; 832. Wire outlet hole; 84. Reinforcement plate; 85. Card block; 86. Card slot; 91. Carriage chain track; 92. Support slats; 93. Carriage chain; 94. Trolley chain track; 95. Trolley chain; 101. First support block; 102. Second support block; 103. First support arm; 104. Second support arm; 105. Hook part; 106. Fixed bracket; 107. Adjustment rod; 108. Assembly hole; 109. Articulated shaft. DETAILED DESCRIPTION

[0050] like Figure 1-21As shown, a chain bridge crane includes a crane beam 1, which includes two parallel and spaced upper end beams 12, two parallel and spaced main beams 11 are provided between the two upper end beams 12, and the tops of the main beams 11 are paved with trolley running tracks 111 arranged parallel to the main beams 11. The upper end beams 12 and the main beams 11 both play a supporting role. The ends of the two main beams 11 are detachably fixed to the tops of the upper end beams 12, and the upper end beams 12 can be movably assembled on the trolley running tracks 13 through the trolley running mechanism 2. The trolley running mechanism 2 can drive the crane beam 1 to move freely longitudinally along the trolley running tracks 13. The top of the main beam 11 is movably equipped with a lifting trolley 3, and the lifting trolley 3 is provided with a trolley traveling mechanism 31, which is installed on the trolley traveling track 111 at the top of the main beam 11. The trolley traveling mechanism 31 can drive the crane trolley 3 to move freely along the trolley traveling track 111. The trolley traveling mechanism 31 includes a trolley traveling motor and a trolley traveling wheel installed on the lifting trolley 3. The power output shaft of the trolley traveling motor is transmission-connected to the trolley traveling wheel. The lifting trolley 3 is provided with a lifting mechanism 4 and a cable retracting device 5. A crane hook 6 is provided below the lifting mechanism 4, and the crane hook 6 is connected to the lifting mechanism 4 through a chain 42.

[0051] The trolley traveling mechanism 2 includes a trolley traveling wheel 21, which can be rotatably assembled at the two ends of the upper end beam 12. A gear column 22 arranged parallel to the main beam 11 is provided between the two upper end beams 12. The gear column 22 is provided with transmission teeth. The two ends of the gear column 22 are transmission-connected to the trolley traveling wheel 21 on the upper end beam 12. The trolley traveling mechanism 2 also includes a support frame 23 fixed on the lifting trolley 3. Several groups of trolley power mechanisms 24 are fixed to the top of the support frame 23. The trolley power mechanism 24 is transmission-connected to the gear column 22. The trolley power mechanism 24 can drive the gear column 22 to rotate, thereby driving the trolley traveling wheel 21 to rotate.

[0052] The trolley power mechanism 24 is provided with two groups and is symmetrically arranged. The trolley power mechanism 24 includes a vertically arranged trolley travel motor 241. A first bevel gear 242 is fixed on the power output shaft of the trolley travel motor 241. The first bevel gear 242 is vertically arranged. The lower end of the support frame 23 is rotatably equipped with a horizontally arranged transmission shaft 243. A second bevel gear 245 and a first gear 244 are fixed on the transmission shaft 243. The first bevel gear 242 and the second bevel gear 245 are meshed with each other. The first gear 244 is meshed with the gear column 22. The trolley power mechanism 24 drives the first bevel gear 242 to rotate, and the first bevel gear 242 transmits power to the second bevel gear 245, and then the first gear 244 on the transmission shaft 243 transmits power to the gear column 22. The trolley travel wheel 21 includes a support portion 211, which is roll-fitted with the trolley travel track 13. A horizontally arranged support shaft 212 is fixed at both ends of the support portion 211. The support shaft 212 is rotatably mounted on the upper end beam 12 via a wheel bearing assembly 213. A gear portion 214 is provided at one end of the support portion 212. The gear portion 214 is coaxially arranged with the support portion 212, and the outer diameter of the gear portion 214 is larger than the diameter of the support portion 212 to prevent derailment. A horizontally arranged support rod 216 is rotatably connected to the upper end beam 12 above the trolley travel wheel 21 via a support rod bearing 215. One end of the support rod 216 is detachably fixedly connected to the gear column 22 coaxially. A second gear 217 is fixed to the support rod 216, which meshes with the gear portion 214 of the trolley travel wheel 21. A gear rack 251 is fixed on the main beam 11 below the gear column 22. The gear rack 251 plays a supporting role. One end of the gear rack 251 extends to the bottom of the gear column 22, and a third gear 25 is rotatably assembled on the gear rack 251. The upper end of the third gear 25 is engaged with the gear column 22. The third gear 25 is arranged directly below the middle of the gear column 22, which can increase the stability of the gear column 22 and reduce the deformation of the gear column 22.

[0053] The lifting mechanism 4 includes a horizontally arranged lifting drum 41, both ends of the lifting drum 41 can be rotatably assembled on the lifting trolley 3, and a chain slot for assembling a chain 42 is provided on the lifting drum 41. The upper end of the chain 42 is assembled in the chain slot, and the lower end of the chain 42 can be detachably fixed to the crane hook 6; a lifting motor 43 is provided on the lifting trolley 3 at both ends of the lifting drum 41, and the two lifting motors 43 are symmetrically arranged, and the power output shafts of the two lifting motors 43 are transmission-connected to the lifting drum 41, and the lifting motor 43 drives the lifting drum 41 to rotate, and the lifting drum 41 pulls the chain 42 upward or downward, thereby adjusting the height of the crane sling 6.

[0054] The cable retracting and releasing device 5 includes a vertically arranged protective shell 51, the cross-section of the protective shell 51 is rectangular, the upper end of the protective shell 51 is detachably fixed to the lifting trolley 3, the upper end of the protective shell 51 extends upward to above the lifting drum 41, and the bottom end of the protective shell 51 extends downward to below the lifting trolley 3. A fixed pulley group 52 is rotatably installed inside the top of the protective shell 51, and a plurality of fixed pulleys are provided on the fixed pulley group 52. A movable pulley group 53 corresponding to the fixed pulley group 52 is provided in the protective shell 51 below the fixed pulley group 52. A cable 54 is wound between the movable pulley group 53 and the fixed pulley group 52. The movable pulley group 53 moves vertically upward to release the cable 54; when the cable 54 needs to be retracted, the movable pulley group 53 moves vertically downward under the action of its own gravity, and the cable 54 is wound between the movable pulley group 53 and the fixed pulley group 52. The cable 54 is retracted and released by lifting and lowering the movable pulley group 53. The top of the protective housing 51 is provided with a plurality of guide wheel brackets 55. The guide wheel brackets 55 are rotatably equipped with guide wheels 551 and wire pressing wheels 552. The guide wheels 551 and wire pressing wheels 552 are arranged in parallel and spaced apart. The cable 54 passes between the guide wheels 551 and the wire pressing wheels 552 and is wound around the guide wheels 551. The guide wheels 551 guide the cable 54. The wire pressing wheels 552 prevent the cable 54 from jumping out of the guide wheels 551, thereby protecting the cable 54. The protective housing 51 of the cable retracting device 5 is provided with two vertically arranged slide rails 56 inside. The two slide rails 56 are respectively fixed to either side of the movable pulley block 53. Slide blocks 561 are fixed to either side of the movable pulley block 53. The slide blocks 561 are slidably mounted on the slide rails 56. The slide rails 56 guide the movable pulley block 53, reducing the shaking of the movable pulley block 53, thereby reducing the traction force on the cable 54 and increasing the service life of the cable 54.

[0055] The crane hook 6 includes a vertically arranged hook support tube 61, the interior of the hook support tube 61 is hollow, and the upper end of the hook support tube 61 is detachably fixed to the chain 42, and the bottom end of the hook support tube 61 is detachably fixed with a lower support platform 62, and a horizontally arranged upper support platform 621 is provided above the lower support platform 62, and a number of evenly spaced support plates 622 are provided between the upper support platform 621 and the lower support platform 62, and the upper support platform 621 is fixed to the lower support platform 62 through the support plate 622, and a vertically arranged rotating motor 63 is fixed to the top of the upper support platform 621, and the rotating motor 63 is connected to the cable 54 in the cable retracting device 5. The top of the lower support platform 62 is rotatably equipped with a connecting head 64 through a support bearing 643. The connecting head 64 plays a connecting role. The upper end of the connecting head 64 is connected to the power output shaft of the rotating motor 63 through a coupling 641. A vertically arranged connecting plate 65 is provided under the lower support platform 62. The upper end of the connecting plate 65 is provided with a fixing portion 651. The upper end of the connecting plate 65 extends upward from the lower support platform 62 and is detachably fixed to the connecting head 64 through a pin 642. The lower end of the connecting plate 65 is detachably fixed with a hook 66 through a flange 661. When the rotating motor 63 is started, the rotating motor 63 drives the connecting plate 65 to rotate through the connecting head 64, thereby realizing the rotation adjustment of the hook 66.

[0056] The cam 72 is fixed on the top of the support post 71 to prevent the cam 72 from sliding out of the locking cam 72. When the cam 72 is unlocked, the cam 72 is unlocked and the locking cam 72 is unlocked. A handle 73 is fixed to one end of the pin shaft 72, and a pin shaft fixing chain 721 is connected to the handle 73. The other end of the pin shaft fixing chain 721 is fixed to the support column 71. The setting of the handle 73 facilitates the removal of the pin shaft 72. The lower end of the support column 71 is provided with an L-shaped baffle 74. The setting of the baffle 74 can reduce the rotation of the pin shaft 72. A flange 661 is fixed to the bottom end of the support column 71. The support column 71 is detachably fixedly connected to the hook 66 through the flange 611. The hook 66 is provided with an anti-hooking part 662. The setting of the anti-hooking part 662 can prevent the heavy object from being unhooked when the hook 33 lifts the heavy object, thereby enhancing safety.

[0057] The crane trolley 3 is provided with a junction box 8, which includes a base 81 for fixing. A plurality of junction box bodies 82 are fixed to the top of the base 81. Support legs 823 are provided at the four corners of the bottom of the junction box body 82. The support legs 823 are provided with fixing holes. The junction box body 82 is detachably fixed to the base 81 by fixing bolts. Both sides of the junction box body 82 are rotatably connected with lock buckles 821. The two lock buckles 821 are symmetrically arranged, and a handle 822 is fixed between the two lock buckles 821. A protective cover 83 is provided above the junction box 8. Fixed buckles 821 are fixed on both sides of the protective cover 83. Column 831, a wire outlet hole 832 is provided on one side of the protective cover 83, and an aviation connector is assembled in the wire outlet hole 832. A wire inlet hole 811 is provided at the bottom of the base. A vertically arranged card block 85 is provided on the side wall of the junction box body 82, and a card slot 86 is provided in the protective cover 83 that corresponds to the card block 85. The arrangement of the card block 85 and the card slot 86 facilitates the positioning of the protective cover 83 and the buckling of the protective cover 83 on the junction box body 82. The junction box 8 is arranged in a buckling manner, which facilitates the disassembly of the junction box 8 and the opening of the junction box 8 by maintenance personnel; reinforcement plates 84 are provided on both sides of the base 81 to improve the strength of the base.

[0058] A vertically arranged wire rack 9 is fixed on the upper end beam 12 on the left side of the main beam 11. A trolley chain track 91 parallel to the upper end beam 12 is provided on one side of the wire rack 9. The upper end of the trolley chain track 91 is open, and two L-shaped support slats 92 are provided in the trolley chain track 91. The support slats 92 are fixed on the inner wall of the trolley chain track 91, and there is a gap between the two support slats 92. A trolley chain 93 is provided on the support slats 92. The setting of the support slats 92 supports the trolley chain 93, thereby increasing the contact between the trolley chain 93 and the air. The contact area increases the heat dissipation speed. One end of the trolley support chain 93 is fixed to the wire rack 9. A trolley support chain track 94 is fixed to one side of the main beam 11. A trolley support chain 95 is arranged in the trolley support chain track 94. The existing trolley power supply generally adopts a conductive slider. A power supply track is set above the steel structure factory building of the workshop, and the bridge crane is powered by the conductive slider. This power supply method is relatively dangerous, and in order to meet the power supply needs, the conductive slider needs to be cleaned and replaced frequently. The bridge crane is powered by the trolley support chain track 91, which enhances safety and improves work efficiency.

[0059] Both ends of the lifting trolley 3 are provided with an anti-hook device 10, which includes a first support block 101 and a second support block 102. The first support block 101 and the second support block 102 are fixed to the crane trolley 3 accordingly. The first support block 101 is rotatably connected to the first support arm 103 through a hinge shaft 109, and the second support block 102 is rotatably connected to the second support arm 104 through a hinge shaft 109. The first support arm 103 and the second support arm 104 are symmetrically arranged, and the bottom ends of the first support arm 103 and the second arm 104 are both provided with an L-shaped hook portion 105. An adjusting rod 107 is provided at the top of one arm 103 and the second arm 104. The adjusting rod 107 extends to the top of the lifting trolley 3. A vertically arranged fixing bracket 106 is fixed on the lifting trolley 3. The fixing bracket 106 is provided with a plurality of assembly holes 108 for fixing the adjusting rod 107. A plurality of assembly holes 108 are provided to adjust the distance between the hook portion 105 and the main beam 11, and can be suitable for main beams 11 of different specifications. The various assembly holes 108 are arranged in sequence from top to bottom. The setting of the anti-hook device 10 can prevent the lifting trolley 3 from derailing, thereby enhancing safety performance.

[0060] Preferably, a lifting frame 32 for lifting the lifting trolley 3 is provided above the lifting mechanism 4. The four corners of the bottom end of the lifting frame 32 are fixed on the lifting trolley 3. The lifting frame 32 is a dome-shaped frame, and a lifting hole 33 for lifting is opened at the top of the lifting frame 32.

[0061] Preferably, a cable-releasing hole is provided at the bottom end of the protective shell 51 of the cable retracting device 5 , and a camera bracket 261 is detachably fixed to the bottom end of the protective shell 51 , on which the camera 26 is mounted.

[0062] Usage process:

[0063] When the present invention is working, the position of the crane beam 1 is first adjusted, and the trolley travel motor 43 on the trolley travel mechanism 2 is started. The power output shaft of the trolley travel motor 43 rotates, and drives the first gear 244 to rotate through the first bevel gear 242 and the second bevel gear 245. The first gear 244 transmits power to the gear column 22, and the second gear 217 provided at the end of the gear column 22 drives the gear portion 214 on the trolley travel wheel 21 to rotate, and the supporting portion 211 of the trolley travel wheel 21 rolls along the trolley travel track 13, thereby driving the crane beam 1 to move freely along the trolley travel track 13. When the crane beam 1 is moved to the top of the heavy object to be lifted, the trolley travel motor 43 is stopped. When the crane beam 1 moves along the trolley travel track 13, the wire frame 9 drags one end of the trolley support chain 93, and the trolley support chain 93 is reciprocated and laid flat in the trolley support chain track 91;

[0064] To adjust the position of the lifting trolley 3, first start the trolley travel motor on the trolley travel mechanism 31. The trolley travel motor drives the trolley travel wheels to freely reciprocate along the trolley travel track 111 at the top of the main beam 11. When the lifting trolley 3 moves directly above the load to be lifted, the trolley travel motor is stopped. When the lifting trolley 3 moves along the trolley travel track 111 on the main beam 11, (due to the positioning reverse elimination function of the electrical control system, there is no friction between the first gear 244 and the gear column 22, and the first gear 244 and the gear column 22 will not be damaged);

[0065] Adjust the height of the crane hook 6, start the lifting motor 43, the lifting motor 43 drives the lifting drum 41 to rotate, the lifting drum 41 rotates and releases the chain 42, and the crane hook 3 falls freely in the vertical direction under the action of its own gravity. After the crane hook 6 falls to the specified position, start the rotating motor 63 on the crane hook 6, the power output shaft of the rotating motor 63 drives the connecting head 64 to rotate, and the connecting head 64 drives the hook 66 to rotate. After the angle of the hook 66 is adjusted, stop the rotating motor 63, and then start the trolley travel motor to adjust the position of the lifting trolley 3. After the hook 66 hangs the weight, start the lifting motor 43 again, the lifting motor 43 drives the lifting drum 41 to rotate in the opposite direction, the lifting drum 41 pulls the chain 42, and the chain 42 pulls the hook 66 and the weight to rise vertically;

[0066] When assembling the crane hook 6, it is necessary to adjust the angle of the crane hook 6. The pin 72 is rotated by the handle 73 so that the handle 73 is free from the obstruction of the baffle 74. Then the pin 72 is pulled out, and the hook 66 and the support column 71 are moved downward until the connecting plate 65 is removed from the support column 71. Then, after rotating the hook 66 and the support column 71 180 degrees clockwise, the hook 66 and the support column 71 are moved upward, and the connecting plate 65 is inserted into the support column 71 again. Then, the support column 71 is fixed to the connecting plate 65 by the pin 72. The pin 72 is rotated and the handle 73 is rotated into the baffle 74 to achieve the reversal of the hook 66.

[0067] When the cable retracting and releasing device 5 is used, when the crane hook 6 drops vertically, the cable pulls the movable pulley block 53 to move vertically upward, the slider 561 slides upward in the slide rail 56, the distance between the movable pulley block 53 and the fixed pulley block 52 decreases, and the cable 54 between the movable pulley block 53 and the fixed pulley block 52 is released; similarly, when the crane hook 6 rises, the movable pulley block 53 drops vertically under the action of its own gravity, at this time the slider 561 slides vertically downward along the slide rail 56, the distance between the movable pulley block 53 and the fixed pulley block 52 increases, and the cable 54 is wound between the movable pulley block 53 and the fixed pulley block 52, thereby realizing the retraction and release of the cable 54;

[0068] When the junction box 8 is in use, the cable enters the junction box body 82 from the cable entry hole 811 at the bottom end of the base 81, completes the line conversion in the junction box body 82, and then passes through the outlet hole 832 on the protective cover 83; when it is necessary to remove the protective cover, the handle 822 is pressed, the lock 821 rotates and disengages from the fixing post 831 on the protective cover 83, and after the cable passes through the outlet hole 832 on the protective cover 83, the protective cover 83 is buckled on the top of the junction box body 82, and the handle 822 is rotated upward, and the fixing post 831 falls into the lock 821, thereby fixing the protective cover 83;

[0069] The use of the anti-hook device 10. When installing the anti-hook device 10, the first support block 101 and the second support block 102 are welded according to the distance between the two main beams 11. The height of the adjusting rod 107 installed on the support frame 106 is used to adjust the distance between the hook part 105 and the main beam 11, so as to be suitable for main beams 11 of different specifications.

[0070] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "top", "bottom", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0071] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A chain bridge crane comprising a crane girder, the crane girder comprising two parallel and spaced upper end beams, two parallel and spaced main beams disposed between the two upper end beams, the ends of the two main beams being detachably fixed to the top ends of the upper end beams, the upper end beams being movably assembled on a trolley travel track via a trolley travel mechanism, and characterized in that: The top of the main beam is movably equipped with a lifting trolley, which is equipped with a lifting mechanism and a cable retracting and releasing device. A crane hook is provided below the lifting mechanism, and the crane hook is connected to the lifting mechanism through a chain. The trolley travel mechanism includes trolley travel wheels, which are rotatably mounted on both ends of the upper end beam. A gear column is provided between the two upper end beams and is arranged parallel to the main beam. Both ends of the gear column are transmission-connected to the trolley travel wheels on the upper end beam. The trolley travel mechanism also includes a support frame fixed to the lifting trolley. Several groups of trolley power mechanisms are fixed on the top of the support frame. The trolley power mechanisms are transmission-connected to the gear column. The lifting mechanism includes a horizontally arranged lifting drum, both ends of which can be rotatably assembled on the lifting trolley. A chain slot for assembling a chain is provided on the lifting drum. The upper end of the chain is assembled in the chain slot, and the lower end of the chain can be removably fixed to the crane hook. Lifting motors are provided on the lifting trolleys at both ends of the lifting drum. The two lifting motors are symmetrically arranged, and the power output shafts of the two lifting motors are transmission-connected to the lifting drum.

2. A chain bridge crane according to claim 1, characterized in that: The trolley power mechanism is provided with two groups and is symmetrically arranged. The trolley power mechanism includes a vertically arranged trolley travel motor, a first bevel gear is fixed on the power output shaft of the trolley travel motor, and the lower end of the support frame is rotatably equipped with a horizontally arranged transmission shaft, a second bevel gear and a first gear are fixed on the transmission shaft, the first bevel gear and the second bevel gear are meshed with each other, and the first gear is meshed with the gear column; the trolley travel wheel includes a support part, both ends of the support part are fixed with a horizontally arranged support shaft, the support shaft is rotatably assembled on the upper end beam through a wheel bearing assembly, and a gear part is provided at one end of the support part. The gear part is coaxially arranged with the support part, and the outer diameter of the gear part is larger than the diameter of the support part, and the support part is roller-fitted with the trolley traveling track; the upper end beam above the trolley traveling wheel is rotatably connected with a horizontally arranged support rod through a support rod bearing, one end of the support rod is detachably fixedly connected to the gear column coaxially, and a second gear is fixed on the support rod, and the second gear is meshed with the gear part of the trolley traveling wheel; a gear rack is fixed on the main beam below the gear column, one end of the gear rack extends to the bottom of the gear column, and the gear rack is rotatably equipped with a second gear, and the upper end of the second gear is meshed with the gear column.

3. The chain bridge crane according to claim 1, characterized in that: The cable taking-up and releasing device includes a vertically arranged protective shell, the upper end of the protective shell is detachably fixed to the lifting trolley, the upper end of the protective shell extends upward to above the lifting drum, and the bottom end of the protective shell extends downward to below the lifting trolley, and a fixed pulley group is rotatably installed inside the top of the protective shell, and a movable pulley group corresponding to the fixed pulley group is provided in the protective shell below the fixed pulley group, and a cable is wound between the movable pulley group and the fixed pulley group; a plurality of guide wheel brackets are provided at the top of the protective shell, and guide wheels and pressure wheels are rotatably installed on the guide wheel brackets, and the guide wheels and pressure wheels are parallel and spaced apart, and the cable passes between the guide wheels and the pressure wheels and is wound around the guide wheels; two vertically arranged slide rails are provided inside the protective shell of the cable taking-up and releasing device, and the two slide rails are respectively fixed on both sides of the movable pulley group, and sliders are fixed on both sides of the movable pulley group, and the sliders are slidably assembled on the slide rails.

4. A chain bridge crane according to claim 3, characterized in that: A cable-releasing hole is provided at the bottom end of the protective shell of the cable retracting and releasing device, and a camera bracket is detachably fixed to the bottom end of the protective shell, on which a camera is mounted.

5. The chain bridge crane according to claim 1, characterized in that: The crane hook includes a vertically arranged hook support tube, the upper end of the hook support tube is detachably fixed to the chain, the bottom end of the hook support tube is detachably fixed with a lower support platform, a horizontally arranged upper support platform is provided above the lower support platform, and a number of support plates evenly spaced are provided between the upper support platform and the lower support platform, the upper support platform is fixed to the lower support platform through the support plate, a vertically arranged rotating motor is fixed on the top of the upper support platform, and a connecting head is rotatably assembled on the top of the lower support platform through a support bearing, the upper end of the connecting head is transmission-connected to the power output shaft of the rotating motor, a vertically arranged connecting plate is provided below the lower support platform, the upper end of the connecting plate extends upward from the lower support platform and is detachably fixed to the connecting head, and the lower end of the connecting plate is detachably fixed with a hook.

6. The chain bridge crane according to claim 5, characterized in that: A sling diverter is provided between the connecting plate and the hook. The sling diverter includes a vertically arranged support column, a vertically arranged rectangular through hole is provided on the support column, a horizontally arranged fixing hole is provided on the side of the support column, and a fixing hole corresponding to the fixing hole on the support column is provided on the connecting plate. The support column is fixedly connected to the connecting plate through a pin shaft; a handle is fixed to one end of the pin shaft, a pin shaft fixing chain is connected to the handle, and the other end of the pin shaft fixing chain is fixed to the support column; an L-shaped baffle is provided at the lower end of the support column, and a flange is fixed to the bottom end of the support column. The support column is detachably fixed to the hook through the flange plate, and an anti-hooking member is provided on the hook.

7. The chain bridge crane according to claim 1, characterized in that: A hoisting frame for lifting the lifting trolley is provided above the lifting mechanism. The four corners of the bottom end of the hoisting frame are fixed on the lifting trolley. The hoisting frame is a dome-shaped frame, and a lifting hole for hoisting is opened at the top of the hoisting frame.

8. The chain bridge crane according to claim 1, characterized in that: A junction box is provided on the crane trolley. The junction box includes a base that serves as a fixation. Several junction box bodies are fixed on the top of the base. Both sides of the junction box body are rotatably connected with locks. The two locks are symmetrically arranged, and a handle is fixed between the two locks. A protective cover is provided above the junction box. Fixed columns corresponding to the locks are fixed on both sides of the protective cover. A wire outlet hole is opened on one side of the protective cover, and an aviation connector is installed in the wire inlet hole. A wire inlet hole is provided at the bottom of the base.

9. The chain bridge crane according to claim 1, characterized in that: A vertically arranged wire rack is fixed on the upper end beam on the left side of the main beam, and a trolley chain track parallel to the upper end beam is provided on one side of the wire rack. The upper end of the trolley chain track is open, and two L-shaped support slats are provided in the trolley chain track. The support slats are fixed on the inner wall of the trolley chain track, and there is a gap between the two support slats. A trolley chain is provided on the support slats, and one end of the trolley chain is fixed to the wire rack; a trolley chain track is fixed on one side of the main beam, and a trolley chain is provided in the trolley chain track.

10. The chain bridge crane according to claim 1, characterized in that: Both ends of the lifting trolley are provided with an anti-hook device, which includes a first support block and a second support block. The first support block and the second support block are respectively fixed on the crane trolley. The first support block is rotatably connected to the first arm through a hinge shaft, and the second support block is rotatably connected to the second arm through a hinge shaft. The first arm and the second arm are symmetrically arranged, and the bottom ends of the first arm and the second arm are provided with L-shaped hook parts. The top ends of the first arm and the second arm are provided with adjusting rods, and the adjusting rods extend to the top of the lifting trolley. A vertically arranged fixing bracket is fixed on the lifting trolley, and a plurality of assembly holes for fixing the adjusting rod are provided on the fixing bracket, and the assembly holes are arranged in sequence from top to bottom.

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