Overload protection device for sliding contact line of crane

Abstract

The utility model discloses a crane sliding contact line overload protection device, and belongs to the technical field of crane protection devices. A crane sliding contact line overload protection device comprises a sliding guide rail hung on a ceiling and a crane body installed on the surface of the sliding guide rail in a sliding mode. According to the crane sliding contact line overload protection device, an electric telescopic rod stretches out to drive a movable block, a movable block and a sliding contact wheel to move upwards, so that the sliding contact wheel is in contact communication with the sliding contact line, and then a crane body slides on a sliding guide rail to hoist and move goods; the electric telescopic rod retracts to drive the moving block, the movable block and the sliding contact wheel to move downwards, the sliding contact wheel moves downwards to be separated from the sliding contact line, the sliding contact wheel and the sliding contact line are disconnected, at the moment, the crane body cannot hoist objects, overload work of the crane body is prevented, deformation of the sliding guide rail is avoided, and the service life of the crane body and the service life of the sliding guide rail are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of crane protection devices, and more specifically, to an overload protection device for a crane trolley wire. Background Art

[0002] The crane trolley wire is a key device for providing continuous power supply to cranes and other mobile equipment. The crane trolley wire plays a crucial role in industrial production. It can ensure that the equipment continuously obtains power supply during the moving process, thus guaranteeing the continuity and high efficiency of production. As a key industrial power supply device, the quality and performance of the crane trolley wire directly affect the safe operation and production efficiency of the hoisting machinery. By reasonably selecting the type, installing it standardly, and regularly maintaining and servicing it, the performance of the trolley wire can be maximized, providing strong support for enterprise production. The crane trolley wire requires an overload protection device for protection.

[0003] Chinese Patent Application No. CN201921719457.2 discloses a conductive contact structure for a sky rail system, including a track. The track is divided into upper and lower layers. A conductive contact device is fixedly arranged in the upper layer inside the track, and a pulley mechanism is movably arranged in the lower layer inside the track. A fixed electrical equipment is fixedly arranged above the track, and a mobile crane is arranged below the track. The mobile crane is connected to the pulley mechanism through a hook; a power supply is arranged inside the mobile crane. A conductive copper sheet is arranged at the upper end of the pulley mechanism. The bottom of the conductive contact device protrudes with a power contact corresponding to the conductive copper sheet. At the same time, the conductive contact device is connected to the fixed electrical equipment through a first wire, and the conductive copper sheet on the pulley mechanism is connected to the power supply inside the mobile crane through a second wire;

[0004] In the above technical solution, the conductive contact structure adds a conductive contact device, obtains electric power from the power supply inside the mobile crane, and transmits it to a fixed electrical equipment at a specific position of the sky rail system through the conductive contact structure. However, when the crane hoists goods exceeding its own weight, since the crane itself does not have an overload protection device, the overloaded operation of the crane will cause the deformation of the slide rail, thereby affecting the normal conveying of goods by the crane and reducing the service life of the crane and the slide rail itself. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an overload protection device for a crane trolley wire to solve the problems raised in the above background art:

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An overload protection device for a crane trolley wire, comprising a sliding guide rail hoisted on the ceiling and a crane body slidably mounted on the surface of the sliding guide rail. At the top surface of the crane body, two fixed plates are correspondingly fixedly installed. Activity grooves are formed on the inner surfaces of the two fixed plates. An activity block matching with the activity grooves is slidably connected inside the activity grooves. A sliding contact wheel is rotatably connected to the surface of the activity block. A support wheel is rotatably connected to the inner side surface of the fixed plate. A moving block is fixedly connected to the surface of the activity block. A mounting seat is fixedly connected to the outer surface of the fixed plate. An electric telescopic rod is fixedly installed on the surface of the mounting seat. The telescopic end of the electric telescopic rod is fixedly connected to the bottom surface of the moving block. Lower guide grooves and upper guide grooves are respectively formed on the upper and lower inner surfaces of the sliding guide rail. The lower guide grooves and the upper guide grooves match with the support wheel and the sliding contact wheel. A sliding contact wire in contact with the sliding contact wheel is fixedly installed inside the upper guide groove.

[0008] By adopting the above technical solution, when the electric telescopic rod extends, it drives the moving block, the activity block and the sliding contact wheel to move upward, so that the sliding contact wheel contacts and communicates with the sliding contact wire. Then, the crane body slides on the sliding guide rail to hoist and move goods. When the weight of the item to be hoisted is greater than the hoisting weight value of the crane body, the electric telescopic rod retracts, driving the moving block, the activity block and the sliding contact wheel to move downward. The sliding contact wheel moves downward and disengages from the sliding contact wire, causing the sliding contact wheel to disconnect from the sliding contact wire. At this time, the crane body does not hoist items, preventing the crane body from working overloaded, avoiding deformation of the sliding guide rail, and prolonging the service life of the crane body and the sliding guide rail.

[0009] Preferably, a hanging frame is movably connected below the crane body. The hanging frame is movably connected to the crane body through a steel wire rope. A weight sensor is fixedly installed on the surface of the hanging frame. A lifting ring is arranged at the bottom surface of the hanging frame.

[0010] Preferably, a controller is fixedly installed on the surface of the crane body. The weight sensor is electrically connected to the controller through a wire. The electric telescopic rod is electrically connected to the controller through a wire.

[0011] Preferably, a spring is elastically connected between the activity block and the activity groove. One end of the spring is fixedly connected to the bottom surface of the activity block, and the other end of the spring is fixedly connected to the inner wall of the activity groove.

[0012] Preferably, the crane body is slidably connected to the sliding guide rail through the mutual matching of the support wheel, the lower guide groove, the sliding contact wheel and the upper guide groove.

[0013] Preferably, a card slot communicating with the upper guide groove is formed inside the sliding guide rail. A card block matching with the card slot is slidably connected inside the card slot. The sliding contact wire is fixedly connected to the bottom surface of the card block.

[0014] By adopting the above technical solution, the clamping block is removed from the clamping groove through the separation of the clamping groove and the clamping block, and then the sliding contact line is removed. When installing a new sliding contact line, first fix the sliding contact line on the bottom surface of the clamping block, and then the clamping groove and the clamping block are clamped together, thereby realizing the replacement of the sliding contact line, making the replacement of the sliding contact line convenient and fast, and ensuring the normal transfer of goods by the crane body.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1) When the sliding contact line overload protection device of this crane is in use, lower the hanger and the lifting ring beside the item to be lifted. The weight sensor receives the weight value of the lifted item, and the weight sensor transmits the signal to the controller. The controller receives the signal and analyzes the value. When the weight of the item to be lifted is less than the lifting weight value of the crane body, the electric telescopic rod extends and drives the moving block, the movable block and the sliding contact wheel to move upward, so that the sliding contact wheel contacts and communicates with the sliding contact line, and then the crane body slides on the sliding guide rail to lift and move the goods. When the weight of the item to be lifted is greater than the lifting weight value of the crane body, the electric telescopic rod retracts and drives the moving block, the movable block and the sliding contact wheel to move downward, and the sliding contact wheel moves downward and separates from the sliding contact line, so that the sliding contact wheel disconnects from the sliding contact line. At this time, the crane body will not lift the item, preventing the crane body from working overloaded, avoiding the deformation of the sliding guide rail, and extending the service life of the crane body and the sliding guide rail.

[0017] 2) When the sliding contact line overload protection device of this crane is in use, the clamping block is removed from the clamping groove through the separation of the clamping groove and the clamping block, and then the sliding contact line is removed. When installing a new sliding contact line, first fix the sliding contact line on the bottom surface of the clamping block, and then the clamping groove and the clamping block are clamped together, thereby realizing the replacement of the sliding contact line, making the replacement of the sliding contact line convenient and fast, and ensuring the normal transfer of goods by the crane body. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of the utility model;

[0019] Figure 2 is the structural schematic diagram of the installation position of the electric telescopic rod of the utility model;

[0020] Figure 3 is the structural schematic diagram of the sliding contact wheel of the utility model;

[0021] Figure 4 is the structural schematic diagram of the clamping block of the utility model.

[0022] Description of reference numerals in the figure: 1. Slide guide rail; 2. Crane body; 3. Fixed plate; 4. Movable slot; 5. Movable block; 6. Slide contact wheel; 7. Support wheel; 8. Moving block; 9. Electric telescopic rod; 10. Spring; 11. Mounting seat; 12. Lower guide groove; 13. Upper guide groove; 14. Slide contact line; 15. Hanger; 16. Weight sensor; 17. Hoisting ring; 18. Controller; 19. Card slot; 20. Card block. Detailed implementation mode

[0023] Embodiment 1

[0024] Please refer to Figures 1 to 4 , a crane slide contact line overload protection device, including a slide guide rail 1 hoisted on the ceiling and a crane body 2 slidably mounted on the surface of the slide guide rail 1. The crane body 2 is an electric contact driven crane in the prior art. The slide guide rail 1 ensures the normal operation of the electric contact driven crane. Two fixed plates 3 are fixedly installed corresponding to the top surface of the crane body 2. Movable slots 4 are formed on the inner surfaces of the two fixed plates 3. The movable block 5 matches the movable slot 4, ensuring the stable movement of the movable block 5. A movable block 5 matching therewith is slidably connected inside the movable slot 4. A slide contact wheel 6 is rotatably connected to the surface of the movable block 5. The surface of the slide contact wheel 6 has a conductive slide contact surface. A support wheel 7 is rotatably connected to the inner side surface of the fixed plate 3. The support wheel 7 supports the crane body 2. A moving block 8 is fixedly connected to the surface of the movable block 5. A mounting seat 11 is fixedly connected to the outer surface of the fixed plate 3. An electric telescopic rod 9 is fixedly installed on the surface of the mounting seat 11. The electric telescopic rod 9 is a conventional electric push rod in the prior art. The telescopic end of the electric telescopic rod 9 is fixedly connected to the bottom surface of the moving block 8. Lower guide grooves 12 and upper guide grooves 13 are respectively formed on the upper and lower inner surfaces of the slide guide rail 1. The lower guide groove 12 and the upper guide groove 13 match the support wheel 7 and the slide contact wheel 6. A slide contact line 14 in contact with the slide contact wheel 6 is fixedly installed inside the upper guide groove 13. By lowering the hanger 15 and the hoisting ring 17 beside the item to be hoisted, the weight sensor 16 receives the weight value of the hoisted item. The weight sensor 16 transmits the signal to the controller 18. The controller 18 receives the signal and analyzes the value. When the weight of the item to be hoisted is less than the hoisting weight value of the crane body 2, the electric telescopic rod 9 extends to drive the moving block 8, the movable block 5 and the slide contact wheel 6 to move upward, so that the slide contact wheel 6 is in contact and connected with the slide contact line 14, and then the crane body 2 slides on the slide guide rail 1 to hoist and move the goods. When the weight of the item to be hoisted is greater than the hoisting weight value of the crane body 2, the electric telescopic rod 9 retracts to drive the moving block 8, the movable block 5 and the slide contact wheel 6 to move downward, and the slide contact wheel 6 moves downward to disengage from the slide contact line 14, so that the slide contact wheel 6 is disconnected from the slide contact line 14. At this time, the crane body 2 will not hoist the item, preventing the crane body 2 from working overloaded, avoiding the deformation of the slide guide rail 1, and extending the service life of the crane body 2 and the slide guide rail 1.

[0025] A hanger 15 is movably connected below the crane body 2. The hanger 15 is movably connected to the crane body 2 through a steel wire rope. A weight sensor 16 is fixedly installed on the surface of the hanger 15. The weight sensor 16 receives the weight value of the lifted item. The weight sensor 16 transmits a signal to the controller 18. A lifting ring 17 is arranged on the bottom surface of the hanger 15, and the lifting ring 17 is used for hanging goods.

[0026] A controller 18 is fixedly installed on the surface of the crane body 2. The weight sensor 16 is electrically connected to the controller 18 through a wire, and the electric telescopic rod 9 is electrically connected to the controller 18 through a wire. The controller 18 is a conventional programmable controller 18 in the prior art.

[0027] A spring 10 is elastically connected between the movable block 5 and the movable groove 4. One end of the spring 10 is fixedly connected to the bottom surface of the movable block 5, and the other end of the spring 10 is fixedly connected to the inner wall of the movable groove 4. The setting of the spring 10 further ensures the stable movement of the movable block 5.

[0028] The crane body 2 is slidably connected to the sliding guide rail 1 through the mutual matching of the support wheels 7, the lower guide groove 12, the sliding contact wheels 6 and the upper guide groove 13.

[0029] Usage steps of the utility model: When the overhead crane trolley wire overload protection device is in use, when the overhead crane trolley wire is in use, first lower the steel wire rope through the crane body 2, and lower the hanging frame 15 and the hanging ring 17 beside the item to be lifted. The weight sensor 16 receives the weight value of the lifted item, and the weight sensor 16 transmits the signal to the controller 18. The controller 18 receives the signal and analyzes the value. When the weight of the item to be lifted is less than the lifting weight value of the crane body 2, the controller 18 sends an extending signal to the electric telescopic rod 9. The electric telescopic rod 9 extends and drives the moving block 8, the movable block 5 and the sliding contact wheel 6 to move upward. At this time, the spring 10 is stretched, and the sliding contact wheel 6 moves upward to contact the trolley wire 14. The sliding contact wheel 6 is connected to the trolley wire 14, so that the crane body 2 slides on the sliding guide rail 1 to lift and move the goods. When the weight of the item to be lifted is greater than the lifting weight value of the crane body 2, the controller 18 sends a retracting signal to the electric telescopic rod 9. At this time, the electric telescopic rod 9 retracts and drives the moving block 8, the movable block 5 and the sliding contact wheel 6 to move downward. The sliding contact wheel 6 moves downward to disengage from the trolley wire 14, so that the sliding contact wheel 6 is disconnected from the trolley wire 14. At this time, the crane body 2 will not lift the item. This solution lowers the hanging frame 15 and the hanging ring 17 beside the item to be lifted. The weight sensor 16 receives the weight value of the lifted item, and the weight sensor 16 transmits the signal to the controller 18. The controller 18 receives the signal and analyzes the value. When the weight of the item to be lifted is less than the lifting weight value of the crane body 2, the electric telescopic rod 9 extends and drives the moving block 8, the movable block 5 and the sliding contact wheel 6 to move upward, so that the sliding contact wheel 6 contacts and connects with the trolley wire 14, so that the crane body 2 slides on the sliding guide rail 1 to lift and move the goods. When the weight of the item to be lifted is greater than the lifting weight value of the crane body 2, the electric telescopic rod 9 retracts and drives the moving block 8, the movable block 5 and the sliding contact wheel 6 to move downward. The sliding contact wheel 6 moves downward to disengage from the trolley wire 14, so that the sliding contact wheel 6 is disconnected from the trolley wire 14. At this time, the crane body 2 will not lift the item, preventing the crane body 2 from working overloaded, avoiding the deformation of the sliding guide rail 1, and prolonging the service life of the crane body 2 and the sliding guide rail 1.

[0030] Embodiment 2

[0031] When the crane body 2 slides on the surface of the sliding guide rail 1, the long-term friction between the sliding contact wheel 6 and the trolley wire 14 will cause wear on the surface of the trolley wire 14. When the sliding contact wheel 6 rolls on the surface of the trolley wire 14, when the sliding contact wheel 6 moves to the worn position, there may be a situation where the sliding contact wheel 6 is disconnected from the trolley wire 14, which will affect the transfer of goods by the crane body 2.

[0032] Please refer to Figures 1 to 4, the difference in the combination implementation lies in that a card slot 19 communicating with the upper guide slot 13 is provided inside the sliding guide rail 1. A block 20 matching the card slot 19 is slidably connected inside the card slot 19. The sliding contact line 14 is fixedly connected to the bottom surface of the block 20. By separating the card slot 19 from the block 20, the block 20 is removed from the card slot 19, and then the sliding contact line 14 is removed. When installing a new sliding contact line 14, first fix the sliding contact line 14 to the bottom surface of the block 20, and engage the card slot 19 with the block 20, thereby realizing the replacement of the sliding contact line 14, making the replacement of the sliding contact line 14 convenient and fast, and ensuring the normal transfer of goods by the crane body 2.

[0033] Steps of using the present utility model: When the overhead crane sliding contact line overload protection device is in use, when removing the sliding contact line 14, by separating the card slot 19 from the block 20, the block 20 is removed from the card slot 19, and then the sliding contact line 14 is removed. When installing a new sliding contact line 14, first fix the sliding contact line 14 to the bottom surface of the block 20, and engage the card slot 19 with the block 20, thereby realizing the replacement of the sliding contact line 14, making the replacement of the sliding contact line 14 convenient and fast, and ensuring the normal transfer of goods by the crane body 2.

[0034] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and do not limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A crane busbar overload protection device, comprising a slide rail (1) mounted on a ceiling and a crane body (2) slidably mounted on the surface of the slide rail (1), characterized in that: Two fixed plates (3) are fixedly mounted on the top surface of the crane body (2), and the inner surfaces of the two fixed plates (3) are provided with movable grooves (4). The movable grooves (4) are slidably connected to the inside of the movable grooves (4) and the surfaces of the movable blocks (5) are rotatably connected to sliding contact wheels (6). The inner side surfaces of the fixed plates (3) are rotatably connected to supporting wheels (7). The surfaces of the movable blocks (5) are fixedly connected to moving blocks (8), and the outer surfaces of the fixed plates (3) are fixedly connected to mounting plates. A mounting seat (11) is provided, an electric telescopic rod (9) is fixedly mounted on the surface of the mounting seat (11), the telescopic end of the electric telescopic rod (9) is fixedly connected to the bottom surface of the moving block (8), the upper and lower inner surfaces of the slide rail (1) are respectively provided with a lower guide groove (12) and an upper guide groove (13), the lower guide groove (12) and the upper guide groove (13) are matched with the support wheel (7) and the sliding contact wheel (6), and a sliding contact line (14) in contact with the sliding contact wheel (6) is fixedly mounted inside the upper guide groove (13).

2. The overload protection device for a crane busbar according to claim 1 is characterized in that: A hanger (15) is movably connected to the lower part of the crane body (2); the hanger (15) is movably connected to the crane body (2) via a steel wire rope; a weight sensor (16) is fixedly mounted on the surface of the hanger (15); and a lifting ring (17) is provided on the bottom surface of the hanger (15).

3. The crane busbar overload protection device according to claim 2 is characterized in that: A controller (18) is fixedly mounted on the surface of the crane body (2); the weight sensor (16) is electrically connected to the controller (18) via a wire; and the electric telescopic rod (9) is electrically connected to the controller (18) via a wire.

4. The crane busbar overload protection device according to claim 1 is characterized in that: A spring (10) is elastically connected between the movable block (5) and the movable groove (4); one end of the spring (10) is fixedly connected to the bottom surface of the movable block (5), and the other end of the spring (10) is fixedly connected to the inner wall of the movable groove (4).

5. The crane busbar overload protection device according to claim 1 is characterized in that: The crane body (2) is slidably connected to the slide rail (1) by matching the support wheel (7), the lower guide groove (12), the sliding contact wheel (6) and the upper guide groove (13).

6. The crane busbar overload protection device according to claim 1 is characterized in that: The interior of the slide rail (1) is provided with a clamping groove (19) which is in communication with the upper guide groove (13); the interior of the clamping groove (19) is slidably connected to a clamping block (20) which matches the clamping groove; and the sliding contact line (14) is fixedly connected to the bottom surface of the clamping block (20).

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