A bridge crane

Abstract

A bridge crane includes a crane bridge frame. Both ends of the crane bridge frame are mounted on trolley travel rails on a steel structure workshop. Two parallel and spaced main trolley travel rails are laid on the top of the crane bridge frame. An electrical control system is installed on the crane bridge frame. A main trolley is mounted on top of the crane bridge frame and is movably mounted on its travel rails. Two parallel and spaced auxiliary trolley travel rails are laid laterally on top of the main trolley. An auxiliary trolley is mounted on top of the main trolley and is movably mounted on its travel rails. A main hoisting mechanism is located on the right side of the top of the main trolley, and an auxiliary hoisting mechanism is located on top of the main trolley. A main lifting device is located below the main hoisting mechanism and is connected to the main hoisting mechanism via a wire rope. An auxiliary lifting device is located below the auxiliary trolley and is connected to the auxiliary hoisting mechanism via a wire rope. This invention has a simple structure and is easy to use.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment technology, and in particular relates to a bridge crane. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. Also known as an overhead crane, gantry crane, or hoist, it generally includes gantry cranes, bridge cranes, and tower cranes. Bridge cranes are a very common and important type of industrial lifting equipment, widely used in fixed indoor or semi-indoor locations such as factory workshops, warehouses, material yards, power plants, and ports. Their core function is to provide efficient vertical lifting and horizontal movement of materials and heavy objects within a fixed span. Existing bridge cranes, designed for lifting heavy objects, are configured with double trolleys—that is, identical lifting trolleys—based on the shape of the object. The two trolleys are adjusted according to the lifting requirements. The position of the two trolleys is adjusted by controlling the movement of the two trolleys on the auxiliary trolley travel track at the top of the main beam, so that they are compatible with the heavy objects to be lifted. However, the following technical problems exist: 1. Since the operator controls the crane trolley from the cab, it is difficult to adjust the distance between the two crane trolleys; 2. When the two trolleys lift heavy objects, they need to move synchronously. However, due to the error between the motors of the two crane trolleys, and the momentary slippage of the travel wheels when the crane trolleys start, the error is relatively large. Therefore, in the existing technology, the bridge crane is inconvenient to use, and long-term operation will cause large errors, affecting production safety. Utility Model Content

[0003] This invention addresses the technical problems of existing bridge cranes, such as the inconvenience of simultaneous operation of two trolleys and the significant errors caused by prolonged operation, which affect production safety. The invention provides a bridge crane comprising a horizontally arranged crane bridge, two longitudinally parallel and spaced-apart end beams, and two laterally parallel and spaced-apart main beams between the end beams. The two ends of the main beams are detachably fixed to the end beams. Both the main beams and end beams provide support. A trolley traveling mechanism is located at the bottom of each end beam. The end beams are movably mounted on a trolley traveling track via the trolley traveling mechanism. The trolley traveling mechanism includes trolley traveling wheels and a trolley traveling motor. The trolley traveling wheels are rotatably mounted on the end beams, and the trolley traveling motor is fixed to one side of the end beams. The power output shaft of the trolley traveling motor is connected to the trolley traveling wheels via a transmission connection. The trolley traveling motor is connected to a power supply and an electrical control system via a cable. Starting the trolley traveling motor causes the trolley traveling wheels to rotate along the trolley traveling track, thereby causing the crane bridge to move longitudinally along the trolley traveling track. The crane bridge has two movable ends mounted on trolley travel rails on a steel structure workshop. Two parallel and spaced main trolley travel rails are laid on the top of the crane bridge. The crane bridge is equipped with an electrical control system. The main trolley is mounted on top of the crane bridge and is movably mounted on its travel rail. Two parallel and spaced auxiliary trolley travel rails are laid laterally on top of the main trolley. An auxiliary trolley is mounted on top of the main trolley and is movably mounted on its travel rail. Both the main and auxiliary trolleys are equipped with trolley travel mechanisms, which include trolley wheels. The trolley travel motor is connected to the trolley travel wheel drive. The trolley travel motor is connected to the power supply and electrical control system via a cable. When the trolley travel motor on the main trolley is started, it drives the trolley travel wheel on the main trolley to move laterally along the auxiliary trolley travel track at the top of the main beam. When the trolley travel motor on the auxiliary trolley is started, it drives the trolley travel wheel on the auxiliary trolley to move laterally along the auxiliary trolley travel track at the top of the main trolley. This allows the distance between the auxiliary lifting device and the main lifting device to be adjusted. Once the distance is adjusted, after lifting the heavy object, only the movement position of the main trolley needs to be controlled.The main hoisting mechanism is located on the top right side of the main trolley, and the auxiliary hoisting mechanism is located on top of the main trolley. Below the main hoisting mechanism is the main lifting device, which is connected to the main hoisting mechanism via a wire rope. Below the auxiliary trolley is the auxiliary lifting device, which is connected to the auxiliary hoisting mechanism via a wire rope. The main hoisting mechanism includes two symmetrically arranged, coaxially aligned main hoisting drums, which are rotatably mounted on the main trolley via brackets. It also includes two symmetrically arranged, coaxially aligned main hoisting motors fixed to the main trolley, located on one side of the main hoisting drums. Additionally, it includes two symmetrically arranged reducers, which are connected to the main hoisting drums via drive shafts and reducers. The main lifting device is connected to the two main hoisting drums via wire ropes. The main hoisting motors are connected to the power supply and control system via cables. Starting the main hoisting motors causes the main hoisting drums to wind and pull the wire ropes, thereby raising the height of the main lifting device. The auxiliary lifting mechanism includes an auxiliary lifting drum rotatably mounted on the auxiliary trolley and an auxiliary lifting motor fixed on the auxiliary trolley. The auxiliary lifting motor is connected to the auxiliary lifting drum via a drive, and the auxiliary lifting device is connected to the auxiliary lifting drum via a wire rope. The auxiliary lifting motor is connected to the power supply and control system via a cable, and the auxiliary lifting motor is started. The auxiliary lifting motor winds the wire rope through the auxiliary lifting drum, thereby raising the height of the auxiliary lifting device.

[0004] Preferably, the main lifting device includes a horizontally arranged support beam, with movable pulley assemblies at the top of both ends of the support beam. The two movable pulley assemblies are connected to the main lifting drum via wire ropes, and main hooks are hinged to the bottom of both ends of the support beam.

[0005] Preferably, the auxiliary lifting device is a flip-up hook.

[0006] Preferably, the crane cab is located below the left end of the crane bridge.

[0007] Preferably, a climbing ladder connecting to the cab is provided below the left end of the crane bridge.

[0008] Preferably, the crane bridge is provided with a cable tray, and the cable tray is provided with a cable.

[0009] The above scheme has the following advantages: A secondary trolley travel track is laid on the top of the main trolley, and a laterally moving secondary trolley is mounted on the secondary trolley travel track. This facilitates adjusting the distance between the secondary lifting device on the secondary trolley and the main lifting device on the main trolley. When lifting heavy objects, only the trolley travel motor on the main trolley needs to be started, which reduces the number of operation steps, makes it easier for the operator to operate the crane, improves production efficiency, and saves production costs. The main hoisting mechanism adopts two main hoisting motors, and the two main hoisting motors are coaxial with the hoisting drums and have double brakes. The coaxial arrangement of the two main hoisting motors facilitates synchronous operation and drives the two main hoisting drums to rotate synchronously. The combined use of the main lifting device and the secondary lifting device facilitates loading and unloading. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the left-side structure of this utility model; Figure 3 This is a top view of the structure of this utility model.

[0011] Reference numerals: 1. Crane bridge; 2. Main trolley; 3. Auxiliary trolley; 4. Main hoisting mechanism; 5. Auxiliary hoisting mechanism; 11. Main beam; 12. End beam; 13. Main trolley travel track; 14. Cab; 15. Climbing ladder; 16. Cable tray; 17. Cable; 18. Trolley travel mechanism; 19. Electrical control system; 21. Trolley travel mechanism; 22. Auxiliary trolley travel track; 40. Support beam; 41. Main lifting device; 42. Main hoisting drum; 43. Main hoisting motor; 44. Reducer; 45. Drive shaft; 46. Brake; 51. Auxiliary lifting device; 52. Auxiliary hoisting drum; 53. Auxiliary hoisting motor. Detailed Implementation

[0012] like Figure 1-3As shown, a bridge crane includes a horizontally arranged crane bridge 1. The crane bridge 1 includes two longitudinally parallel and spaced-apart end beams 12. Two transversely parallel and spaced-apart main beams 11 are provided between the two end beams 12. The two ends of the main beams 11 are detachably fixed to the end beams 12. Both the main beams 11 and the end beams 12 provide support. A trolley traveling mechanism 18 is provided at the bottom of the end beams 12. The end beams 12 are movably mounted on a trolley traveling rail via the trolley traveling mechanism 18. The trolley traveling rail is laid on a steel... The I-beam rails on the structural workshop, the trolley traveling mechanism 18 includes trolley traveling wheels and trolley traveling motors. The trolley traveling wheels are rotatably mounted on the end beam 12, and the trolley traveling motor is fixed on one side of the end beam 12. The power output shaft of the trolley traveling motor is connected to the trolley traveling wheels via a transmission. The trolley traveling motor is connected to the power supply and the electrical control system 19 via a cable. When the trolley traveling motor is started, it can drive the trolley traveling wheels to rotate along the trolley traveling track, thereby driving the crane bridge 1 to move longitudinally along the trolley traveling track. The crane bridge 1 has two movable ends mounted on the trolley travel rails on the steel structure workshop. Two parallel and spaced main trolley travel rails 13 are laid on the top of the crane bridge 1. An electrical control system 19 is installed on the crane bridge 1. A main trolley 2 is mounted above the crane bridge 1 and is movably mounted on the main trolley travel rails 13. Two parallel and spaced auxiliary trolley travel rails 22 are laid laterally on the top of the main trolley 2. An auxiliary trolley 3 is mounted above the main trolley 2 and is movably mounted on the auxiliary trolley travel rails 22. Both the main trolley 2 and the auxiliary trolley 3 are equipped with trolley travel mechanisms 21. The trolley travel mechanism 21 includes a small... The trolley has wheels and a motor. The motor is connected to the wheels via a drive system. The motor is connected to the power supply and control system 19 via a cable. When the motor on the main trolley 2 is started, it drives the wheels on the main trolley 2 to move laterally along the auxiliary trolley track 22 at the top of the main beam 11. When the motor on the auxiliary trolley 3 is started, it drives the wheels on the auxiliary trolley 3 to move laterally along the auxiliary trolley track 22 at the top of the main trolley 2. This allows the distance between the auxiliary lifting device 51 and the main lifting device 41 to be adjusted. Once the distance is adjusted, after lifting the load, only the movement position of the main trolley 2 needs to be controlled.A main lifting mechanism 4 is located on the top right side of the main trolley 2, and an auxiliary lifting mechanism 5 is located on the top of the main trolley 2. A main lifting device 41 is located below the main lifting mechanism 4 and is connected to the main lifting mechanism 4 by a steel wire rope. An auxiliary lifting device 51 is located below the auxiliary trolley 3 and is connected to the auxiliary lifting mechanism 5 by a steel wire rope. The main lifting mechanism 4 includes two symmetrical and coaxially arranged main lifting drums 42, which are rotatably mounted on the main trolley 2 via a bracket. It also includes two symmetrical and coaxially arranged main lifting electric motors fixed on the main trolley 2. The main hoisting motor 43 is located on one side of the main hoisting drum 42, and also includes two symmetrically arranged reducers 44. The main hoisting motor 43 is connected to the main hoisting drum 42 through the drive shaft 45 and the reducers 44. A brake 46 is also provided at the rotating shaft 45. The main lifting device 41 is connected to the two main hoisting drums 42 through steel wire ropes. The main hoisting motor 43 is connected to the power supply and the electrical control system 19 through cables. When the main hoisting motor 43 is started, it drives the main hoisting drum 42 to wind and pull the steel wire rope, thereby achieving the purpose of raising the height of the main lifting device 41. The auxiliary lifting mechanism 5 includes an auxiliary lifting drum 52 rotatably mounted on the auxiliary trolley 3 and an auxiliary lifting motor 53 fixed on the auxiliary trolley 3. The auxiliary lifting motor 53 is connected to the auxiliary lifting drum 52 in a transmission connection, and the auxiliary lifting device 51 is connected to the auxiliary lifting drum 52 via a wire rope. The auxiliary lifting motor 53 is connected to the power supply and the electrical control system 19 via a cable. The auxiliary lifting motor 53 is started, and the auxiliary lifting motor 53 winds the wire rope through the auxiliary lifting drum 52, thereby raising the height of the auxiliary lifting device 51.

[0013] Preferably, the main lifting device 41 includes a horizontally arranged support beam 40, with movable pulley assemblies at the top of both ends of the support beam 40. The two movable pulley assemblies are connected to the main lifting drum 42 via wire ropes, and main hooks are hinged to the bottom of both ends of the support beam 40.

[0014] Preferably, the auxiliary lifting device 51 is a flip-up hook.

[0015] Preferably, a driver's cab 14 is provided below the left end of the crane bridge 1.

[0016] Preferably, a climbing ladder 15 connected to the cab 14 is provided below the left end of the crane bridge 1.

[0017] Preferably, the crane bridge 1 is provided with a cable tray 16, and the cable tray 16 is provided with a cable 17.

[0018] Usage process: In use, this invention involves starting the trolley travel motor, which drives the trolley travel wheels to rotate along the trolley travel track, thereby causing the crane bridge 1 to move longitudinally along the trolley travel track. Then, starting the trolley travel motor on the main trolley 2 causes the trolley travel wheels on the main trolley 2 to move laterally along the auxiliary trolley travel track 22 at the top of the main beam 11. Finally, starting the trolley travel motor on the auxiliary trolley 3 causes the trolley travel wheels on the auxiliary trolley 3 to move laterally along the auxiliary trolley travel track at the top of the main trolley 2. The lateral movement of the guide rail 22 allows for adjustment of the distance between the auxiliary lifting device 51 and the main lifting device 41. Once the distance is adjusted, after lifting the heavy object, it is only necessary to control the movement position of the main trolley 2 and start the main lifting motor 43. The main lifting motor 43 drives the main lifting drum 42 to rotate and pulls the main lifting device 41 vertically through the wire rope. Similarly, the auxiliary lifting motor 53 is started, and the auxiliary lifting motor 53 pulls the auxiliary lifting device 51 vertically through the auxiliary lifting drum 52 and the wire rope, thereby realizing the lifting of the heavy object.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal", "vertical", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A bridge crane, comprising a horizontally arranged crane bridge, both ends of which are movably mounted on trolley travel rails on a steel structure workshop, and two parallel and spaced main trolley travel rails laid on the top of the crane bridge, and an electrical control system installed on the crane bridge, characterized in that: The crane bridge is equipped with a main trolley above it, which is movably mounted on the main trolley travel rail. Two parallel and spaced auxiliary trolley travel rails are laid horizontally on the top of the main trolley. An auxiliary trolley is located above the main trolley and is movably mounted on the auxiliary trolley travel rail. A main hoisting mechanism is located on the right side of the top of the main trolley, and an auxiliary hoisting mechanism is located on the top of the main trolley. A main lifting device is located below the main hoisting mechanism and is connected to the main hoisting mechanism by a wire rope. An auxiliary lifting device is located below the auxiliary trolley and is connected to the auxiliary hoisting mechanism by a wire rope.

2. A bridge crane according to claim 1, characterized in that: The main hoisting mechanism includes two symmetrical and coaxially arranged main hoisting drums, which are rotatably mounted on the main trolley via brackets. It also includes two symmetrical and coaxially arranged main hoisting motors fixed on the main trolley, with the main hoisting motors located on one side of the main hoisting drums. Additionally, it includes two symmetrically arranged reducers, which are connected to the main hoisting drums via drive shafts and reducers. The main lifting device is connected to the two main hoisting drums via wire ropes.

3. A bridge crane according to claim 1, characterized in that: The auxiliary lifting mechanism includes an auxiliary lifting drum rotatably mounted on the auxiliary trolley and an auxiliary lifting motor fixed on the auxiliary trolley. The auxiliary lifting motor is connected to the auxiliary lifting drum via a drive, and the auxiliary lifting device is connected to the auxiliary lifting drum via a wire rope.

4. A bridge crane according to claim 1, characterized in that: The crane bridge includes two longitudinally parallel and spaced-apart end beams, and two transversely parallel and spaced-apart main beams between the two end beams. The two ends of the main beams are detachably fixed to the end beams, and the bottom of the end beams is equipped with a trolley traveling mechanism. The end beams can be movably mounted on the trolley traveling rails through the trolley traveling mechanism.

5. A bridge crane according to claim 1, characterized in that: Both the main trolley and the auxiliary trolley are equipped with a trolley traveling mechanism, which includes trolley traveling wheels and trolley traveling motors. The trolley traveling motors are connected to the trolley traveling wheels via a transmission.

6. A bridge crane according to claim 1, characterized in that: The main lifting device includes a horizontally arranged support beam. Both ends of the support beam are equipped with movable pulley assemblies. The two movable pulley assemblies are connected to the main lifting drum by wire ropes. The main lifting hooks are hinged to the bottom of both ends of the support beam.

7. A bridge crane according to claim 1, characterized in that: The auxiliary lifting device is a flip-up hook.

8. A bridge crane according to claim 1, characterized in that: The operator's cab is located at the lower left end of the crane bridge.

9. A bridge crane according to claim 8, characterised in that: A climbing ladder connecting to the cab is located at the lower left end of the crane bridge.

10. A bridge crane according to claim 1, characterized in that: The crane bridge is equipped with a cable tray, and the cable is placed on the cable tray.

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