Crane running mechanism with anti-skid function

Abstract

This utility model relates to a crane trolley, specifically a crane operating mechanism with anti-slip function. It includes a frame, with drive wheels rotatably connected to the bottom of two adjacent corners of the frame. Rotary drums are rotatably connected to the upper sidewall of the frame at positions corresponding to the two drive wheels. In this utility model, when the drive wheels move close to the end stop area of ​​the track, the piston rods of the two electric telescopic rods retract synchronously. This action drives the connecting plate and the rack to move synchronously, thereby driving the arc-shaped rack meshing with the rack and its fixed rotary drum to rotate around its own axis. Ultimately, the fan-shaped nozzle is precisely rotated and housed in the space between the two drive wheels, effectively avoiding the risk of collision with the end stop. The trolley does not need to reserve additional safety space to protect the nozzle, allowing it to move closer to the end stop, thus improving the trolley's operating range and flexibility, and meeting the high-precision end positioning requirements for cargo transportation.

Description

Technical Field

[0001] This utility model relates to a crane trolley, specifically, to a crane running mechanism with anti-slip function. Background Technology

[0002] A crane trolley is a component mounted on the main beam rails of a crane, capable of moving laterally along the rails. Its core function is to achieve precise horizontal movement of loads within the span of a crane (such as a bridge crane or gantry crane). The trolley is typically equipped with a hoisting mechanism (winch, wire rope, hook, etc.) responsible for vertically lifting and lowering goods. Once the hoisting mechanism lifts the goods, the trolley itself moves along the main beam rails, horizontally transporting the goods from point A to point B below the crane. Therefore, the crane trolley is the core moving unit for the crane to complete key operations such as loading, unloading, hoisting, and precise positioning of goods, greatly improving the efficiency and flexibility of material handling.

[0003] Crane trolleys are prone to slippage when traveling on rails, primarily due to insufficient friction between the drive wheels and the rails. This is especially true during startup, acceleration, hill climbing, or when encountering slippery conditions caused by oil, rain, or frost. If the tangential force applied by the drive wheels exceeds the maximum static friction, slippage will occur. To effectively address this issue, existing technologies commonly employ a sand-spraying device on the trolley. This solution works by spraying dry sand particles onto the contact surface between the drive wheels and the rails. The rough surface of the sand particles significantly increases the instantaneous coefficient of friction. These sand particles can embed themselves between the wheels and rails, effectively breaking down oil and water films and enhancing the mechanical engagement between them. Simultaneously, the deformation of the sand particles under shear force allows for more efficient transmission of traction. Therefore, under harsh conditions with low adhesion, sand spraying effectively suppresses wheel slippage, ensuring reliable trolley movement.

[0004] However, in order to pre-apply sand to the track, the nozzles of the sand-applying equipment usually need to extend beyond the trolley body. The end stop at the end of the track is designed to prevent the trolley from derailing and provide safety. But this also brings a key problem: when the trolley runs to the end of the track, the nozzles extending from the side are very likely to have a rigid collision with the end stop, causing serious damage to the nozzles. To avoid such collisions, the traditional solution is to leave a safety gap between the nozzle and the end stop. However, the existence of this safety gap limits the final stopping position of the trolley as it approaches the end of the track, preventing it from reaching the end of the track to the maximum extent, which causes inconvenience to the loading and unloading of goods and reduces work efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a crane running mechanism with anti-slip function to solve the problems mentioned in the background art above:

[0006] The safety gap between the nozzle and the end stop limits the final stopping position of the trolley as it approaches the end of the track, preventing it from reaching the end of the track to the maximum extent and causing inconvenience to the loading and unloading of goods.

[0007] To address the above problems, the present invention aims to provide a crane operating mechanism with anti-slip function, comprising a frame, with drive wheels rotatably connected to the bottom of two adjacent corners of the frame, and rotating drums rotatably connected to the upper sidewall of the frame at positions corresponding to the two drive wheels. An extension tube is fixedly connected to the circumferential sidewall of each rotating drum, and a fan-shaped nozzle is fixedly connected to the other end of the extension tube. A sandblasting device is fixedly installed on the upper sidewall of the frame, and a discharge pipe is fixedly connected to the sandblasting device at positions corresponding to the two rotating drums. The other end of the discharge pipe is coaxially rotatably connected to the top of the corresponding rotating drum. A drive mechanism is provided on the frame at positions corresponding to the two rotating drums. The drive mechanism drives the corresponding rotating drum to rotate. When the drive wheel travels normally on the track, the fan-shaped nozzle is located in front of the drive wheel in the direction of travel. When the drive wheel reaches a stop near the end of the track, the drive mechanism drives the corresponding rotating drum to rotate, causing the fan-shaped nozzle to rotate to a position near the middle of the frame.

[0008] As a further improvement to this technical solution, the drive mechanism includes a guide frame fixedly mounted on the side wall of the vehicle frame. A straight rack is horizontally slidably arranged on the side of the guide frame near the corresponding rotating cylinder. An arc-shaped rack is coaxially fixedly connected to the circumferential side wall of the rotating cylinder, and the arc-shaped rack meshes with the straight rack.

[0009] As a further improvement to this technical solution, a connecting plate is fixedly connected to the lower side wall of the rack, and an electric telescopic rod is horizontally fixedly installed on the frame, with the piston rod end of the electric telescopic rod fixedly connected to the connecting plate.

[0010] As a further improvement to this technical solution, a baffle plate is fixedly installed on the upper side wall of the guide frame, and the baffle plate is located directly above the meshing point of the arc-shaped rack and the straight rack.

[0011] As a further improvement to this technical solution, an infrared rangefinder is fixedly installed at the front end of the vehicle frame in the direction of travel, and the infrared rangefinder is located between the two drive wheels.

[0012] As a further improvement to this technical solution, a dustproof component is provided on the frame at the position corresponding to each drive mechanism. The dustproof component includes a transverse U-shaped frame fixedly installed on the frame.

[0013] As a further improvement to this technical solution, a hinge plate is hinged to the top of the side of the U-shaped frame away from the connection with the vehicle frame. When the hinge plate is in a state of gravity suspension, the lower end of the hinge plate contacts the bottom side of the U-shaped frame.

[0014] As a further improvement to this technical solution, when the fan-shaped nozzle rotates to a position close to the middle of the frame, the fan-shaped nozzle is located inside the corresponding U-shaped frame.

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

[0016] 1. The crane's running mechanism with anti-slip function retracts synchronously on the piston rods of the two electric telescopic rods when the drive wheels approach the end stop area of ​​the track. This action drives the connecting plate and the rack to move synchronously, thereby driving the arc-shaped rack meshing with the rack and its fixed rotating drum to rotate around its own axis. Finally, the fan-shaped nozzle is precisely rotated and housed in the space between the two drive wheels, thus effectively avoiding the risk of collision with the end stop. The trolley does not need to reserve additional safety space to protect the nozzle and can move to a position closer to the end stop, thereby improving the trolley's working range and flexibility and meeting the high-precision end positioning requirements of cargo transportation.

[0017] 2. In this crane running mechanism with anti-slip function, when the drum drives the fan-shaped nozzle to rotate to the storage position, the fan-shaped nozzle first contacts the hinge plate and continuously pushes the hinge plate, forcing it to rotate upward around the hinge axis. This increases the distance between the lower end of the hinge plate and the bottom side of the U-shaped frame. The fan-shaped nozzle then enters the interior of the U-shaped frame through this increased gap and eventually reaches the storage position near the middle of the frame. At this point, the fan-shaped nozzle disengages from the hinge plate, and the hinge plate immediately returns to its vertically suspended posture under the action of gravity. At this time, the U-shaped frame and the reset hinge plate together form an enclosing structure, effectively preventing external dust and impurities from entering the interior of the fan-shaped nozzle and reducing the risk of the fan-shaped nozzle malfunctioning due to blockage by foreign objects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is one of the partial structural schematic diagrams of this utility model;

[0020] Figure 3 For the present utility model Figure 2 A sectional view;

[0021] Figure 4 This is the second partial structural schematic diagram of the present utility model;

[0022] Figure 5 For the present utility model Figure 4 A schematic diagram of the structure after removing the shielding plate;

[0023] Figure 6 This is a schematic diagram of the structure of the fan-shaped nozzle of this utility model rotating to a position close to the middle of the frame.

[0024] The meanings of the labels in the diagram are as follows:

[0025] 1. Chassis; 11. Drive wheels;

[0026] 2. Sandblasting equipment; 21. Discharge pipe;

[0027] 3. Rotating drum; 31. Extension tube; 32. Fan-shaped nozzle;

[0028] 4. Drive mechanism; 41. Guide frame; 42. Baffle plate; 43. Straight rack; 44. Connecting plate; 45. Electric telescopic rod; 46. Curved rack;

[0029] 5. Dustproof components; 51. U-shaped frame; 52. Hinge plate;

[0030] 6. Infrared rangefinder. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1

[0033] Please see Figure 1 As shown, the purpose of this embodiment is to provide a crane operating mechanism with anti-slip function, namely a crane trolley, including a frame 1. Drive wheels 11 are rotatably connected to the bottom of two adjacent corners of the frame 1. A motor and transmission components are fixedly installed on the frame 1 to drive the two drive wheels 11 to rotate precisely and synchronously (this driving principle is a mature technical solution and will not be described in detail here). Driven wheels are rotatably connected to the bottom of the other two corners of the frame 1. The crane trolley runs on a double rail, one of which carries one drive wheel 11 and one driven wheel. When the motor drives the two drive wheels 11 to rotate synchronously, the friction generated between the drive wheels 11 and their respective rails can stably and effectively drive the entire crane trolley to move.

[0034] To effectively increase the friction between the drive wheel 11 and the track and prevent the drive wheel 11 from slipping, refer to Figure 2 Rotary drums 3 are rotatably connected to the upper side wall of the frame 1 at positions corresponding to the two drive wheels 11. An extension tube 31 is fixedly connected to the circumferential side wall of the rotary drum 3, and a fan-shaped nozzle 32 is fixedly connected to the other end of the extension tube 31.

[0035] Reference Figure 3A sandblasting device 2 is fixedly installed on the upper side wall of the frame 1. The sandblasting device 2 consists of a shell and an integrated sand box, arch breaking device, feeding mechanism and pneumatic conveying system. The sand box is pre-filled with sand. A discharge pipe 21 is fixedly connected to the position corresponding to the two rotating drums 3 on the sandblasting device 2. The discharge pipe 21 serves as the discharge end of the pneumatic conveying system. The other end of the discharge pipe 21 is coaxially rotatably connected to the top of the corresponding rotating drum 3. The discharge pipe 21 and the extension pipe 31 are both connected to the interior of the rotating drum 3. Both the discharge pipe 21 and the extension pipe 31 are steel rigid pipes.

[0036] When the drive wheel 11 is traveling normally on the track, the fan-shaped nozzle 32 is located in front of the drive wheel 11 in the direction of travel. The frame 1 is equipped with a speed measuring radar for real-time measurement of the trolley's running speed and a drive end encoder for monitoring the theoretical rotational speed of the drive wheel 11 (the theoretical rotational speed refers to the expected rotational speed of the drive wheel 11 calculated based on the motor speed and the transmission ratio of the transmission components under ideal conditions without slippage). The trolley's control equipment is electrically connected to the speed measuring radar, the drive end encoder, and the sandblasting equipment 2.

[0037] When the control equipment detects that the theoretical rotational speed of the drive wheel 11 is continuously higher than the actual running speed of the trolley fed back by the speed measuring radar, it is determined that the drive wheel 11 is slipping. At this time, the control equipment immediately starts the arch breaking device, feeding mechanism and pneumatic conveying system of the sandblasting equipment 2. Under the action of pneumatic force, the sand in the sand box is conveyed to the inside of the rotating drum 3 through the discharge pipe 21, and then evenly sprayed onto the track surface in front through the fan-shaped nozzle 32 via the extension pipe 31.

[0038] The drive wheel 11 then travels through a section of track covered with sand. This sand increases the coefficient of friction between the drive wheel 11 and the track contact surface, thereby providing stronger adhesion and allowing the drive wheel 11 to regain effective friction with the track and stop slipping.

[0039] The specific working methods of the internal arch breaking, feeding and pneumatic conveying of sand in the sandblasting equipment 2, as well as the control logic of the control equipment for the speed measuring radar, encoder and sandblasting equipment 2, are all existing mature technologies and will not be elaborated in this article.

[0040] An end stop is installed at the end of the track to prevent the trolley from derailing. However, when the trolley reaches the end of the track, if the fan-shaped nozzle 32 on its side collides with the end stop, it is very easy to damage the nozzle. To avoid this situation, the traditional solution requires a safety distance between the two, but this will limit the final stopping position of the trolley, making it unable to get close enough to the end of the track, thus causing inconvenience to the loading and unloading of goods.

[0041] To solve the above problems, a drive mechanism 4 is provided on the frame 1 at the position corresponding to the two rotating drums 3. The drive mechanism 4 is used to drive the corresponding rotating drum 3 to rotate. An infrared rangefinder 6 is fixedly installed at the front end of the frame 1 in the direction of travel. The infrared rangefinder 6 is located between the two drive wheels 11. The infrared rangefinder 6 can monitor the actual distance between the trolley and the end stop of the track in real time and accurately.

[0042] When the drive wheel 11 moves to the area near the end stop of the track, and the infrared rangefinder 6 detects that the distance between the frame 1 and the end stop has reached a preset safety threshold, it will immediately send an electrical signal to the control device of the trolley. The control device will then start the drive mechanism 4, which will drive the corresponding rotating drum 3 to rotate, causing the fan-shaped nozzle 32 to rotate to a position near the middle of the frame 1. Figure 6 At this time, the fan-shaped nozzle 32 is safely housed in the space between the two drive wheels 11, effectively avoiding the risk of the fan-shaped nozzle 32 colliding with the end stop.

[0043] Thanks to this active avoidance mechanism, the trolley no longer needs to reserve extra space to protect the nozzle, allowing it to move closer to the end stop, greatly improving its operating range and flexibility, and effectively meeting the end-positioning requirements of cargo transportation. The reliable working principle of the infrared rangefinder 6, as a commercially available and mature product, will not be elaborated here.

[0044] The structure of drive mechanism 4 is described in detail below, referring to... Figure 4 and Figure 5 The drive mechanism 4 includes a guide frame 41 fixedly installed on the upper side wall of the frame 1. A straight rack 43 is horizontally slidably arranged on the side of the guide frame 41 near the corresponding rotating cylinder 3. An arc rack 46 is coaxially fixedly connected to the circumferential side wall of the rotating cylinder 3. The arc rack 46 meshes with the straight rack 43. A connecting plate 44 is fixedly connected to the lower side wall of the straight rack 43. An electric telescopic rod 45 is horizontally fixedly installed on the frame 1. The piston rod end of the electric telescopic rod 45 is fixedly connected to the connecting plate 44.

[0045] The electric telescopic rod 45 is controlled by the trolley control equipment. When the fan-shaped nozzle 32 needs to be stored, the control equipment controls the piston rods of the two electric telescopic rods 45 to retract synchronously. The retraction action of the piston rod directly drives the connecting plate 44 and the straight rack 43 to move synchronously. Through the meshing transmission between the straight rack 43 and the arc rack 46, the arc rack 46 and its fixed rotating cylinder 3 are driven to rotate around their own axis, thereby accurately rotating the fan-shaped nozzle 32 to the storage position close to the middle of the frame 1, completing the storage action.

[0046] To ensure transmission reliability, a baffle plate 42 is fixedly installed on the upper side wall of the guide frame 41. The baffle plate 42 is located directly above the meshing point of the arc-shaped rack 46 and the straight rack 43. The baffle plate 42 effectively blocks external dust, impurities and other foreign objects from falling into the meshing area, preventing foreign objects from interfering with or damaging the meshing transmission between the racks, and ensuring the long-term stable operation of the mechanism.

[0047] To protect the fan-shaped nozzle 32 in its containment state from dust, a dustproof component 5 is provided on the frame 1 at a position corresponding to each drive mechanism 4. The dustproof component 5 includes a horizontally placed U-shaped frame 51 fixedly installed on the frame 1. A hinge plate 52 is hinged to the top of the side of the U-shaped frame 51 away from the connection with the frame 1. When the hinge plate 52 is not subjected to external force, it hangs naturally under the action of gravity, and its lower end is in close contact with the bottom side of the U-shaped frame 51 to form a contact seal.

[0048] During the process of the rotating drum 3 driving the fan-shaped nozzle 32 to rotate towards the storage position, the fan-shaped nozzle 32 first contacts the hinge plate 52 and continuously pushes the hinge plate 52, forcing it to rotate upward around the hinge axis. This action increases the distance between the lower end of the hinge plate 52 and the bottom side of the U-shaped frame 51. The fan-shaped nozzle 32 enters the interior of the U-shaped frame 51 through this increased gap and eventually reaches the storage position near the middle of the frame 1. Once the fan-shaped nozzle 32 has completely entered and disengaged from the hinge plate 52, the hinge plate 52 immediately returns to a vertically suspended posture under the action of gravity, and its lower end re-contacts the bottom side of the U-shaped frame 51. At this time, the U-shaped frame 51 and the reset hinge plate 52 together form an enclosing structure, effectively preventing external dust and impurities from entering the interior of the fan-shaped nozzle 32 and reducing the risk of the fan-shaped nozzle 32 malfunctioning due to blockage by foreign objects.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A crane running mechanism with anti-skid function, comprising a vehicle frame (1), the bottom of each of two adjacent corners of the vehicle frame (1) is rotationally connected with a driving wheel (11), characterized in that: Rotary drums (3) are rotatably connected to the upper side wall of the frame (1) at positions corresponding to the two drive wheels (11). An extension tube (31) is fixedly connected to the circumferential side wall of the rotary drum (3). A fan-shaped nozzle (32) is fixedly connected to the other end of the extension tube (31). A sandblasting device (2) is fixedly installed on the upper side wall of the frame (1). A discharge pipe (21) is fixedly connected to the sandblasting device (2) at positions corresponding to the two rotary drums (3). The other end of the discharge pipe (21) is connected to the top of the corresponding rotary drum (3). The frame (1) is coaxially rotatably connected, and a drive mechanism (4) is provided at the position corresponding to the two rotating drums (3) on the frame (1). The drive mechanism (4) is used to drive the corresponding rotating drum (3) to rotate. When the drive wheel (11) is traveling normally on the track, the fan-shaped nozzle (32) is located in front of the drive wheel (11) in the direction of travel. When the drive wheel (11) runs to the stop near the end of the track, the drive mechanism (4) drives the corresponding rotating drum (3) to rotate, so that the fan-shaped nozzle (32) rotates to the position near the middle of the frame (1).

2. Crane running gear with anti-slip function according to claim 1, characterized in that The drive mechanism (4) includes a guide frame (41) fixedly installed on the upper side wall of the frame (1). A straight rack (43) is horizontally slidably arranged on the side of the guide frame (41) near the corresponding rotating cylinder (3). An arc rack (46) is coaxially fixedly connected to the circumferential side wall of the rotating cylinder (3). The arc rack (46) meshes with the straight rack (43).

3. The crane running mechanism with anti-slip function according to claim 2, characterized in that: A connecting plate (44) is fixedly connected to the lower side wall of the rack (43), and an electric telescopic rod (45) is horizontally fixedly installed on the frame (1). The piston rod end of the electric telescopic rod (45) is fixedly connected to the connecting plate (44).

4. The crane running mechanism with anti-slip function according to claim 2, characterized in that: A baffle plate (42) is fixedly installed on the upper side wall of the guide frame (41), and the baffle plate (42) is located directly above the meshing point of the arc-shaped rack (46) and the straight rack (43).

5. The crane running mechanism with anti-slip function according to claim 1, characterized in that: An infrared rangefinder (6) is fixedly installed at the front end of the vehicle frame (1) in the direction of travel, and the infrared rangefinder (6) is located between the two drive wheels (11).

6. The crane running mechanism with anti-slip function according to claim 1, characterized in that: Dustproof components (5) are provided on the frame (1) at positions corresponding to each drive mechanism (4). The dustproof components (5) include a horizontally placed U-shaped frame (51) fixedly installed on the frame (1).

7. The crane running mechanism with anti-slip function according to claim 6, characterized in that: The top of the U-shaped frame (51) is hinged to a hinge plate (52) on the side away from the connection with the frame (1). When the hinge plate (52) is in a state of gravity suspension, the lower end of the hinge plate (52) contacts the bottom side inside the U-shaped frame (51).

8. The crane running mechanism with anti-slip function according to claim 6, characterized in that: When the fan-shaped nozzle (32) rotates to a position close to the middle of the frame (1), the fan-shaped nozzle (32) is located inside the corresponding U-shaped frame (51).

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