Double-trolley connecting structure for tower crane quadruple conversion

Abstract

The utility model relates to a double-trolley connecting structure for the two-four ratio conversion of tower crane, including rotatable hook of setting on first trolley and setting on the limit stop of second trolley, and the connection or separation of two trolleys is realized through hook and limit stop, be equipped with the rotating mechanism for driving hook rotation on first trolley, and the rotating mechanism includes rotating link, poking gusset, rotating fork and rotating plate, and rotating link is rotatably connected on first trolley, rotating link is fixedly connected with rotating plate, and rotating link is eccentric and set on rotating plate, rotating fork is connected on rotating plate, and rotating plate is forced from below to above, and rotating plate drives rotating link to rotate, and rotating fork is lifted, the limit mechanism is arranged above rotating fork, makes rotating fork fall back, drives rotating plate and rotating link to rotate back, and rotating link sets up poking gusset, and hook is lifted through poking gusset poking. Without artificial boarding trolley operation, the quick connection and separation of two trolleys are realized.

Description

Technical Field

[0001] This utility model belongs to the field of tower crane ratio conversion systems, specifically relating to a double trolley connection structure for tower crane two-to-four ratio conversion. Background Technology

[0002] Cranes are characterized by high lifting height, large working radius, and large lifting torque. If a single lifting ratio is used to lift heavy objects, it will inevitably result in a significant waste of the lifting capacity of the lifting mechanism. Therefore, in order to improve the working efficiency of cranes, the lifting system is often designed with a variable lifting ratio for the hook, using a higher ratio for large lifting capacities and a lower ratio for small lifting capacities.

[0003] When using two trolleys, the conventional method for converting from 2x to 4x magnification is for the operator to install the pin on the load trolley and lock the two load trolleys. This method requires manual disassembly and installation, which is laborious and cumbersome.

[0004] Therefore, how to make the two trolleys connect and disconnect conveniently and quickly, so as to achieve fast and stable rate conversion, is a problem that needs to be solved. Summary of the Invention

[0005] In view of the defects of the above-mentioned background technology, the purpose of this utility model is to provide a double trolley connection structure for tower crane 2x4 ratio conversion, so as to realize the quick connection and disassembly of the double trolleys.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a double-trolley connection structure for tower crane 2x4 ratio conversion, including a rotatable hook on the first trolley and a limiting stop on the second trolley. The hook rotates to connect or separate from the limiting stop, thereby achieving the connection or separation of the first and second trolleys. The first trolley is provided with a rotating mechanism for driving the hook to rotate. The rotating mechanism includes a rotating connecting rod, a lever plate, a rotating fork, and a rotating plate. The rotating connecting rod is rotatably connected to the first trolley and fixedly connected to the rotating plate. The rotating connecting rod is eccentrically positioned on the rotating plate, and the rotating fork is connected to the rotating plate. A force is applied to the rotating plate from bottom to top, causing the rotating plate to drive the rotating connecting rod to rotate and the rotating fork to lift. A limiting mechanism is provided above the rotating fork to cause the lifted rotating fork to fall back, thereby driving the rotating plate and the rotating connecting rod to rotate. A lever plate is provided near the hook on the rotating connecting rod. The lever plate rotates synchronously with the rotating connecting rod, and the hook is lifted by levering the lever plate.

[0007] Furthermore, the hook is hinged to the first trolley, and a lifting rod is fixedly connected to the hook. The lifting rod rests on the actuating angle plate. When the actuating angle plate rotates upward, it lifts the lifting rod, thereby raising the head of the hook. When the actuating angle plate rotates downward, the head of the hook falls back under the action of gravity.

[0008] Furthermore, the actuating angle plate has an L-shaped structure, wherein the longitudinal part is connected and fixed to the rotating connecting rod, and the lifting rod overlaps the transverse part of the actuating angle plate.

[0009] Furthermore, a connecting seat is fixed on the rotating connecting rod, and a spring is connected to the connecting seat. The other end of the spring is connected to the first trolley, and the rotating connecting rod is rotated by means of the spring.

[0010] Furthermore, a retaining ring is provided on the rotating plate, and the rotating fork is inserted into the retaining ring and rotates synchronously with the rotating plate.

[0011] Furthermore, the rotating fork has an L-shaped cross-section, with its inflection point hinged to the fork seat. The fork seat is fixed to the first trolley. The rotating fork is provided with a protrusion, which is inserted into the retaining ring and moves within the retaining ring, causing the rotating fork to move with the rotating plate.

[0012] Furthermore, the rotating plate is provided with an upper stop bar, and the first trolley is provided with a stop block that cooperates with the upper stop bar. The stop block restricts the rotation and falling position of the rotating plate by blocking the upper stop bar. The rotating plate is also provided with a lower stop bar, which cooperates with the frame at the bottom of the first trolley to block and restrict the rotation and falling position of the rotating plate.

[0013] Furthermore, the limiting mechanism can be raised and lowered above the rotating fork. By pressing down the rotating fork through the limiting mechanism, the rotating fork falls back and drives the rotating plate and rotating connecting rod to rotate, causing the hook to fall back. The limiting mechanism is raised and lowered by manual, electric, pneumatic or hydraulic power.

[0014] Furthermore, the rotating plate is driven from bottom to top by manual, electric, pneumatic, or hydraulic means.

[0015] The beneficial effects of this utility model are as follows: This utility model can realize the quick connection and separation of the hook and the limit stop through the rotating mechanism, thereby realizing the quick connection and separation of the first trolley and the second trolley. Without the need for manual operation by climbing onto the trolley, the tower crane ratio conversion can be carried out efficiently and quickly. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the double-cart connection structure of this utility model; Figure 2 This is a top view of the double-cart connection structure of this utility model; Figure 3 This is a schematic diagram of the rotating mechanism. Figure 4 This is a schematic diagram of the hook structure; Figure 5 This is a schematic diagram showing the connection state between the hook and the limit stop; In the diagram: 1. First trolley, 2. Second trolley, 3. Hook, 4. Limit stop, 5. Rotating linkage, 6. Actuating angle plate, 7. Rotating shift fork, 701. Protrusion, 8. Rotating plate, 9. Snap ring, 10. Lifting rod, 11. Connecting seat, 12. Spring, 13. Shift fork seat, 14. Upper stop rod, 15. Stop block, 16. Lower stop rod, 17. Limiting mechanism. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] See appendix Figure 1-5 A dual-trolley connection structure for tower crane 2x4 ratio conversion includes a rotatable hook 3 on the first trolley 1 and a limiting stop 4 on the second trolley 2. The hook 3 rotates to connect or separate from the limiting stop 4, thereby connecting or separating the first trolley 1 and the second trolley 2. The first trolley 1 is equipped with a rotating mechanism for driving the hook 3 to rotate. The rotating mechanism includes a rotating connecting rod 5, a lever plate 6, a rotating fork 7, and a rotating plate 8. The rotating connecting rod 5 is rotatably connected to the first trolley 1. Rod 5 is fixedly connected to rotating plate 8. Rotating connecting rod 5 is eccentrically set on rotating plate 8. Rotating fork 7 is connected to rotating plate 8. Force is applied to rotating plate 8 from bottom to top. Rotating plate 8 drives rotating connecting rod 5 to rotate and rotating fork 7 to lift. A limit mechanism is set above rotating fork 7. The limit mechanism causes the lifted rotating fork 7 to fall back, thereby driving rotating plate 8 and rotating connecting rod 5 to rotate. A toggle plate 6 is set near hook 3 on rotating connecting rod 5. Toggle plate 6 rotates synchronously with rotating connecting rod 5. The hook 3 is lifted by toggle plate 6.

[0019] Furthermore, the hook 3 is hinged to the first trolley 1 and is in a free-rotating state. A lifting rod 10 is fixedly connected to the hook 3, and the lifting rod 10 overlaps the actuating angle plate 6. When the actuating angle plate 6 rotates upward, it lifts the lifting rod 10, thereby raising the head of the hook 3. When the actuating angle plate 6 rotates downward, the head of the hook 3 falls back under the action of gravity. Specifically, the actuating angle plate 6 has an L-shaped structure, in which the longitudinal part is connected and fixed to the rotating connecting rod 5, and the lifting rod 10 overlaps the transverse part of the actuating angle plate 6. It should be noted that the lifting rod 10 overlaps with the actuating angle plate 6, and the lifting rod 10 can move on the actuating angle plate 6 to avoid jamming.

[0020] Furthermore, a connecting seat 11 is fixed on the rotating connecting rod 5, and a spring 12 is connected to the connecting seat 11. The other end of the spring 12 is connected to the first trolley 1, and the spring 12 assists the rotating connecting rod 5 to rotate.

[0021] Furthermore, a retaining ring 9 is provided on the rotating plate 8, and the rotating fork 7 is inserted into the retaining ring 9 and rotates synchronously with the rotating plate. The rotating fork 7 has an L-shaped cross-section, including a connecting section and a free section set at an angle. Its inflection point is hinged to the fork seat 13, which is fixed to the first trolley 1. An integral protrusion 701 is provided on the connecting section of the rotating fork 7. The protrusion 701 is inserted into the retaining ring 9 and moves within the retaining ring 9, causing the free section of the rotating fork 7 to rise or fall synchronously with the rotating plate 8. There is a movement gap between the protrusion 701 and the retaining ring 9 to prevent jamming.

[0022] Furthermore, the rotating plate 8 is provided with an upper stop bar 14, and the first trolley 1 is provided with a stop block 15 that cooperates with the upper stop bar 14. The stop block 15 restricts the rotation and falling position of the rotating plate 8 by blocking the upper stop bar 14. The rotating plate 8 is also provided with a lower stop bar 16, which cooperates with the frame at the bottom of the first trolley 1 to block and restrict the rotation and falling position of the rotating plate 8.

[0023] In another embodiment, the limiting mechanism 17 can be raised and lowered above the rotating fork 7. By pressing down the rotating fork 7 through the limiting mechanism 17, the rotating fork 7 falls back and drives the rotating plate 8 and the rotating connecting rod 5 to rotate, and the hook 3 falls back. The limiting mechanism 17 is raised and lowered by manual, electric, pneumatic or hydraulic means.

[0024] Regarding the above technical solution, it should be noted that the limiting mechanism 17 can be either fixed or adjustable, both of which can function to lower the rotating fork 7. When the limiting mechanism 17 is fixed, the rotating fork 7 rebounds due to the reaction force generated by its collision with the limiting mechanism 17. This configuration is relatively simple, but may result in the rotating fork 7 not rotating fully, making its position uncontrollable. When the limiting mechanism 17 is adjustable, its descent presses down on the rotating fork 7, ensuring full rotation and making it easier to control, but the structure and operation are more complex.

[0025] Furthermore, the rotating plate 8 is driven from bottom to top by manual, electric, pneumatic or hydraulic means.

[0026] Action process: 1. Connection of two trolleys: The first trolley 1 and the second trolley 2 are brought closer together. A force is applied from bottom to top to the rotating plate 8, which is furthest from the rotating link 5. As the rotating plate 8 rotates upward, it simultaneously causes the retaining ring 9 to move upward, and the protrusion 701 of the rotating fork 7 to move within the retaining ring 9. The free section of the rotating fork 7 is lifted upward. Simultaneously, the rotating link 5 rotates, the actuating angle plate 6 is lifted upward, the lifting rod 10 is raised, and the hook-shaped structure at the head of the hook 3 is lifted, quickly bringing the first trolley 1 and the second trolley 2 together. The rebound force from the impact between the free section of the rotating fork 7 and the limiting device, or the downward pressure of the limiting device, causes the free section of the rotating fork 7 to fall back. The protrusion 701 causes the retaining ring 9 to move downward, the rotating plate 8 to rotate, the rotating link 5 to rotate, the actuating angle plate 6 to move downward, the lifting rod 10 to separate from the actuating angle plate 6, and the hook-shaped structure at the head of the hook 3 to fall under gravity, hooking the limiting stop 4, thus connecting the first trolley 1 and the second trolley 2.

[0027] 2. Connection of two trolleys: Similar to the above-mentioned linkage process, firstly, force is applied from bottom to top to the rotating plate 8 at the end away from the rotating linkage 5, causing the hook-shaped structure at the head of the hook 3 to lift up, driving the first trolley 1 and the second trolley 2 to move away from each other; then, the free section of the rotating fork 7 falls back down, and the hook-shaped structure at the head of the hook 3 falls down under the action of gravity until the lifting rod 10 contacts the actuating angle plate 6.

[0028] Based on the above two action processes, it can be seen that under normal conditions, hook 3 is always in a low position and the rotating mechanism is not subject to external force. Only when the two trolleys need to be connected or separated does an external force need to be provided so that the rotating mechanism can complete a lifting and lowering action.

[0029] It should be noted that the parts of this utility model not described in detail are existing technologies.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] The above-listed embodiments are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A double trolley connection structure for 2x4 ratio conversion of tower cranes, characterized in that: The system includes a rotatable hook mounted on a first trolley and a limiting stop mounted on a second trolley. The hook rotates to connect or disconnect with the limiting stop, thus connecting or separating the first and second trolleys. The first trolley has a rotating mechanism for rotating the hook. This mechanism includes a rotating link, a lever plate, a rotating fork, and a rotating plate. The rotating link is rotatably connected to the first trolley and fixedly connected to the rotating plate. The rotating link is eccentrically positioned on the rotating plate, and the rotating fork is connected to the rotating plate. Applying force upwards to the rotating plate causes the rotating plate to rotate, lifting the rotating link and the rotating fork. A limiting mechanism is located above the rotating fork, causing the lifted rotating fork to fall back down, thereby rotating the rotating plate and the rotating link. A lever plate is located near the hook on the rotating link. The lever plate rotates synchronously with the rotating link, lifting the hook by levering the lever plate.

2. The double trolley connection structure for tower crane 2x4 ratio conversion according to claim 1, characterized in that: The hook is hinged to the first trolley, and a lifting rod is fixedly connected to the hook. The lifting rod rests on the actuating angle plate. When the actuating angle plate rotates upward, it lifts the lifting rod, thereby raising the head of the hook. When the actuating angle plate rotates downward, the head of the hook falls back under the action of gravity.

3. The double trolley connection structure for tower crane 2x4 ratio conversion according to claim 2, characterized in that: The actuating angle plate has an L-shaped structure, with its longitudinal part connected and fixed to the rotating linkage, and the lifting rod overlapping the transverse part of the actuating angle plate.

4. The double trolley connection structure for tower crane 2x4 ratio conversion according to claim 1, characterized in that: A connecting seat is fixed on the rotating connecting rod, and a spring is connected to the connecting seat. The other end of the spring is connected to the first trolley, and the rotating connecting rod is assisted to rotate by the spring.

5. The double trolley connection structure for tower crane 2x4 ratio conversion according to claim 1, characterized in that: The rotating plate is provided with a retaining ring, and the rotating fork is inserted into the retaining ring and rotates synchronously with the rotating plate.

6. The double trolley connection structure for tower crane 2x4 ratio conversion according to claim 5, characterized in that: The rotating fork has an L-shaped cross-section, with its inflection point hinged to the fork seat. The fork seat is fixed to the first trolley. The rotating fork is provided with a protrusion, which is inserted into a retaining ring and moves within the retaining ring, causing the rotating fork to move with the rotating plate.

7. The double trolley connection structure for tower crane 2x4 ratio conversion according to claim 1, characterized in that: The rotating plate is provided with an upper stop bar, and the first trolley is provided with a stop block that cooperates with the upper stop bar. The stop block restricts the rotation and falling position of the rotating plate by blocking the upper stop bar. The rotating plate is also provided with a lower stop bar, which cooperates with the frame at the bottom of the first trolley to block and restrict the rotation and falling position of the rotating plate.

8. The double trolley connection structure for tower crane 2x4 ratio conversion according to any one of claims 1-7, characterized in that: The limiting mechanism can be raised and lowered above the rotating fork. By pressing down the rotating fork through the limiting mechanism, the rotating fork falls back and drives the rotating plate and rotating connecting rod to rotate, causing the hook to fall back. The limiting mechanism is raised and lowered by manual, electric, pneumatic or hydraulic power.

9. The double trolley connection structure for tower crane 2x4 ratio conversion according to any one of claims 1-7, characterized in that: The rotating plate is driven by manual, electric, pneumatic or hydraulic means to apply force from bottom to top.

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