Low position slewing crane trolley

Abstract

The utility model relates to the technical field of hoist, concretely relates to a low-position rotary type hoist trolley, including operation trolley, the below of operation trolley is equipped with rotary trolley frame, is installed between rotary trolley frame and operation trolley and has rotary mechanism, the bottom of rotary trolley frame is installed with lower trolley general assembly, and lower trolley general assembly includes the load platform of fixed connection in the lower part of rotary trolley frame, is installed with hoisting mechanism on load platform, and hoisting mechanism is connected with container spreader through steel wire rope, one side fixed connection of load platform bottom is equipped with the connecting frame of L type, and the bottom surface fixed connection of connecting frame horizontal section has driver's room. The utility model sets up the driver's room at the bottom of rotary trolley frame, and realizes the synchronous rotation of driver's room and container spreader through rotary mechanism, and the driver's vision is consistent with container direction all the time when hoisting, to improve the intuitiveness and precision of alignment operation.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a low-position, downward-slewing crane trolley. Background Technology

[0002] As an important loading and unloading equipment in modern ports and yards, container gantry cranes are widely used for container lifting and stacking operations. In actual operation, in order to meet the stacking needs of containers in different directions, it is usually necessary to install a spreader rotation mechanism on the crane trolley to achieve horizontal rotation of the container.

[0003] However, in traditional crane designs, the operator's cab is usually fixed to the trolley frame or gantry structure and does not rotate synchronously with the spreader. When lifting and stacking containers, the operator needs to adjust the container's orientation by operating the spreader's rotation mechanism. Since the operator's cab is fixed in position while the container rotates with the spreader, the operator's line of sight cannot be synchronized with the container, leading to difficulties in alignment and reduced positioning accuracy. Especially in high-density yards or narrow spaces, the operator needs to frequently adjust their position or rely on monitoring systems for assistance, which not only increases operational complexity but may also lead to reduced work efficiency and safety hazards. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0004] This utility model provides a low-position, downward-slewing crane trolley to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a low-position slewing crane trolley, including a running trolley, a slewing frame is provided below the running trolley, a slewing mechanism is installed between the slewing frame and the running trolley, a lower trolley assembly is installed at the bottom of the slewing frame, the lower trolley assembly includes a bearing platform fixedly connected to the lower part of the slewing frame, a lifting mechanism is installed on the bearing platform, the lifting mechanism is connected to a container spreader through a steel wire rope, an L-shaped connecting frame is fixedly connected to one side of the bottom surface of the bearing platform, and a driver's cab is fixedly connected to the bottom surface of the horizontal section of the connecting frame.

[0006] Preferably, the slewing mechanism includes an external toothed slewing support, the inner ring of which is fixedly connected to the running trolley, and the outer ring of which is fixedly connected to the slewing frame. A vertically mounted motor is installed on the running trolley, and the output shaft of the motor is connected to a gear, which meshes with the outer ring of the external toothed slewing support.

[0007] Preferably, the trolley is equipped with a first straight ladder from the trolley to the external tooth slewing support, the slewing frame is internally fixedly connected to a second straight ladder from the external tooth slewing support to the bearing platform, a third straight ladder is fixedly connected to one side of the bearing platform, and the bottom end of the third straight ladder extends to the driver's cab and is fixedly connected to the driver's cab.

[0008] Preferably, there are two lifting mechanisms, which are respectively installed on both sides of the carrying platform. Each drum is wound with a steel wire rope, and the steel wire rope is connected to the four corners of the container spreader through a pulley block.

[0009] Preferably, the side of the driver's cab closest to the container spreader is made of transparent glass.

[0010] Preferably, a limit switch is installed between the running trolley and the slewing frame.

[0011] The beneficial effects of this utility model are as follows: (1) By setting the driver's cab at the bottom of the slewing frame and realizing the synchronous rotation of the driver's cab and the container spreader through the slewing mechanism, the driver's line of sight is always consistent with the direction of the container during hoisting, thereby improving the intuitiveness and accuracy of the alignment operation; (2) The lifting mechanism of the crane trolley is set on the bearing platform at the bottom of the slewing frame, thereby saving the upper space of the trolley; (3) The double lifting mechanism design can not only improve the redundancy of the lifting capacity, but also reduce the swaying of the container spreader during rotation and lifting through symmetrical force, thereby enhancing the stability of the crane trolley. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Schematic diagram of the structure of section aa; Figure 3 This is a side view of the structure of this utility model; Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.

[0013] Reference numerals: 1. Running trolley, 2. Slewing frame, 3. Slewing mechanism, 31. External gear slewing support, 32. Motor, 33. Reducer, 34. Gear, 4. Lower trolley assembly, 41. Bearing platform, 42. Lifting mechanism, 43. Connecting frame, 44. Driver's cab, 5. Wire rope, 6. Container spreader, 7. First straight ladder, 8. Second straight ladder, 9. Third straight ladder, 10. Pulley block, 11. Limit switch. Detailed Implementation

[0014] The present invention will now be further described with reference to the accompanying drawings.

[0015] like Figure 1-4As shown, this utility model provides a low-position slewing crane trolley, including a running trolley 1, a slewing frame 2 below the running trolley 1, a slewing mechanism 3 installed between the slewing frame 2 and the running trolley 1, a lower trolley assembly 4 installed at the bottom of the slewing frame 2, the lower trolley assembly 4 including a bearing platform 41 fixedly connected to the lower part of the slewing frame 2, a lifting mechanism 42 installed on the bearing platform 41, a container spreader 6 connected to the lifting mechanism 42 by a steel wire rope 5, an L-shaped connecting frame 43 fixedly connected to one side of the bottom surface of the bearing platform 41, and a driver's cab 44 fixedly connected to the bottom surface of the horizontal section of the connecting frame 43.

[0016] Specifically, during use, the driver enters the driver's cab 44 and controls the horizontal movement of the trolley 1 and the lifting mechanism 42 to align the container spreader 6 with the container to be lifted. After the container spreader 6 locks the container, the lifting mechanism 42 raises the container to the required height. When it is necessary to rotate the container, the driver starts the motor 32 of the slewing mechanism 3, which drives the slewing frame 2 to rotate through the gear 34. Since the lifting mechanism 42, the container spreader 6, and the driver's cab 44 are all fixed on the slewing frame 2, they rotate synchronously. The driver's cab 44 rotates with the container spreader 6, and the driver's line of sight is always aligned with the direction of the container, allowing for intuitive alignment operations. After reaching the target position, the lifting mechanism 42 lowers the container to complete the stacking operation. In addition, the lifting mechanism 42 of the trolley is set on the bearing platform 41 at the bottom of the slewing frame 2, which saves the upper space of the trolley 1.

[0017] In some embodiments, the slewing mechanism 3 includes an external gear slewing support 31. The inner ring of the external gear slewing support 31 is fixedly connected to the running trolley 1, and the outer ring of the external gear slewing support 31 is fixedly connected to the slewing frame 2. A vertically mounted motor 32 is installed on the running trolley 1. The output shaft of the motor 32 is driven by a gear 34 through a reducer 33. The gear 34 meshes with the outer ring of the external gear slewing support 31. Specifically, when the motor 32 starts, it drives the outer ring of the external gear slewing support 31 to rotate through the gear 34, thereby driving the slewing frame 2 and all components below it, such as the lifting mechanism 42, the container spreader 6, and the driver's cab 44, to rotate synchronously.

[0018] In some embodiments, a first vertical ladder 7 is installed on the trolley 1, leading from the trolley 1 to the external toothed slewing support 31. A second vertical ladder 8 is fixedly connected inside the slewing frame 2, leading from the external toothed slewing support 31 to the carrying platform 41. A third vertical ladder 9 is fixedly connected to one side of the carrying platform 41, with its bottom end extending to and fixedly connected to the driver's cab 44. Specifically, when the slewing frame 2 rotates to a specific angle, the first vertical ladder 7 and the second vertical ladder 8 are positioned accordingly, allowing the driver to descend from the trolley 1 onto the carrying platform 41 sequentially via the first vertical ladder 7 and the second vertical ladder 8. The driver can then enter the driver's cab 44 from the carrying platform 41 via the third vertical ladder 9.

[0019] In some embodiments, there are two lifting mechanisms 42, which are respectively installed on both sides of the bearing platform 41. Each drum is wound with a steel wire rope 5, which is connected to the four corners of the container spreader 6 through the pulley block 10. The design of the double lifting mechanism 42 can not only improve the redundancy of the lifting capacity, but also reduce the swaying of the container spreader 6 during rotation and lifting by symmetrical force distribution, thereby enhancing the stability of the lifting trolley.

[0020] In some embodiments, the driver's cab 44 is made of transparent glass on the side closest to the container spreader 6, providing the driver with an unobstructed view and facilitating observation of the status of the container spreader 6 and the container.

[0021] In some embodiments, a limit switch 11 is installed between the running trolley 1 and the rotary frame 2. The limit switch 11 is used to detect the rotation angle of the rotary frame 2. In this embodiment, the maximum rotation angle of the rotary frame 2 is 270°. When the rotation angle reaches the preset maximum value, the motor 32 stops running, thereby preventing excessive rotation from causing equipment damage or safety accidents.

[0022] The above embodiments can be combined with each other.

[0023] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A low-position, downward-slewing type crane trolley, comprising a traveling trolley, characterized in that: The trolley is equipped with a slewing frame below it, and a slewing mechanism is installed between the slewing frame and the trolley. The lower trolley assembly is installed at the bottom of the slewing frame. The lower trolley assembly includes a bearing platform fixedly connected to the lower part of the slewing frame. A lifting mechanism is installed on the bearing platform. The lifting mechanism is connected to a container spreader via a wire rope. An L-shaped connecting frame is fixedly connected to one side of the bottom surface of the bearing platform. The driver's cab is fixedly connected to the bottom surface of the horizontal section of the connecting frame.

2. The low-position downward slewing crane trolley according to claim 1, characterized in that: The slewing mechanism includes an external toothed slewing support. The inner ring of the external toothed slewing support is fixedly connected to the running trolley, and the outer ring of the external toothed slewing support is fixedly connected to the slewing frame. A vertically arranged motor is installed on the running trolley, and the output shaft of the motor is connected to a gear. The gear meshes with the outer ring of the external toothed slewing support.

3. The low-position lower slewing crane trolley according to claim 2, characterized in that: The trolley is equipped with a first straight ladder from the trolley to the external tooth slewing support. The slewing frame is internally connected to a second straight ladder from the external tooth slewing support to the bearing platform. A third straight ladder is fixedly connected to one side of the bearing platform. The bottom end of the third straight ladder extends to the driver's cab and is fixedly connected to the driver's cab.

4. The low-position lower slewing crane trolley according to claim 1, characterized in that: There are two lifting mechanisms, which are installed on both sides of the carrying platform. Each drum is wound with a steel wire rope, which is connected to the four corners of the container spreader through a pulley block.

5. A low-position lower slewing crane trolley according to claim 1, characterized in that: The driver's cab is made of transparent glass on the side closest to the container spreader.

6. A low-position lower slewing crane trolley according to claim 1, characterized in that: Limit switches are installed between the running trolley and the rotary frame.

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