Double-car 2:4 ratio conversion system

Abstract

The utility model belongs to tower crane ratio conversion system field, concretely relates to two four ratio conversion system of double trolley, including first luffing trolley, second luffing trolley and lifting hook, first luffing trolley has first trolley pulley set, and first trolley pulley set is connected with the pulley around the rope on single pulley frame through steel wire rope, second luffing trolley has second trolley pulley set, and second trolley pulley set is connected with the pulley set around the rope on double pulley frame through steel wire rope, and lifting hook is hinged on the connecting plate, and the one end of connecting plate is hinged with double pulley frame, and the other end of connecting plate is provided with corresponding connecting plate mounting pin hole with single pulley frame, realizes the detachable connection of connecting plate and single pulley frame, and the corresponding trolley pin hole of realizing detachable connection is set up on the side frame of first luffing trolley and second luffing trolley adjacent side, and the quick connection and disassembly of pulley frame of two luffing trolleys and lifting hook are realized through connecting plate pin shaft subassembly and trolley pin shaft subassembly, and the ratio of tower crane is adjusted rapidly.

Description

Technical Field

[0001] This utility model belongs to the field of tower crane ratio conversion systems, specifically relating to a dual-trolley two-to-four ratio conversion system. 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] With the use of dual trolleys, how to achieve fast and stable rate conversion is a problem that needs to be solved. Summary of the Invention

[0004] In view of the defects of the existing technology, the purpose of this utility model is to provide a dual-cart 2x4 ratio conversion system to realize the rapid connection and disassembly of the dual carts and pulley frame.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a double-trolley 2x4 ratio conversion system, including a first luffing trolley, a second luffing trolley, and a hook. The first luffing trolley has a first trolley pulley block, which is connected to the pulleys on a single pulley frame via a steel wire rope. The second luffing trolley has a second trolley pulley block, which is connected to the pulley block on a double pulley frame via a steel wire rope. The hook is hinged to a connecting plate, one end of which is hinged to the double pulley frame, and the other end of which is hinged to the single pulley frame. The connecting plate is provided with corresponding mounting pin holes. The connecting plate pin shaft assembly is installed in the mounting pin holes to achieve a detachable connection between the connecting plate and the single pulley frame. The frame of the first luffing trolley and the second luffing trolley is provided with corresponding trolley pin holes. The first luffing trolley and the second luffing trolley are detachably connected by installing trolley pin shaft assemblies in the trolley pin holes. The connecting plate pin shaft assembly and the trolley pin shaft assembly have the same structure, both including a connecting pin shaft and a fixing pin. The fixing pin passes through the through holes at both ends of the connecting pin shaft to prevent the connecting pin shaft from falling off.

[0006] Furthermore, the fixing pin is a cylindrical pin and an R-type cotter pin, which are respectively assembled into the through holes at both ends of the connecting pin shaft.

[0007] Furthermore, the single pulley frame and the double pulley frame are provided with corresponding connecting lugs on their adjacent sides. The connecting lugs are formed with pulley frame pin holes. A set of corresponding connecting lugs can be stacked to form a connecting lug assembly for installing pulley frame pins.

[0008] Furthermore, the single pulley frame and the double pulley frame each have two connecting lugs, forming two sets of connecting lug assemblies.

[0009] Furthermore, the connecting plate has a triangular structure, and its three corners are used to connect the single pulley frame, the double pulley frame, and the hook, respectively.

[0010] Furthermore, the connecting plate is an inverted isosceles triangle structure, with the top corner of the connecting plate hinged to the hook, one bottom corner of the connecting plate hinged to the double pulley frame, and the other bottom corner of the connecting plate having a connecting plate mounting pin hole for connection with the single pulley frame.

[0011] Furthermore, when the magnification ratio of the dual-carriage system changes from two times to four times, the first and second luffing carriages are connected by carriage pin assembly, the single pulley frame and the double pulley frame are connected by pulley frame pin, and the connecting plate is connected to the single pulley frame by connecting plate pin assembly.

[0012] Furthermore, when the magnification ratio of the dual-carriage system changes from four times to two times, the first and second luffing carriages separate, the carriage pin assembly remains on the second luffing carriage, the single pulley frame and the double pulley frame separate, the connecting plate separates from the single pulley frame, and the hook is connected to the double pulley frame.

[0013] The beneficial effects of this utility model are as follows: This utility model can realize the quick connection and disassembly of two luffing trolleys and the pulley frame of the hook by installing and disassembling the connecting plate pin assembly and the trolley pin assembly. It can quickly adjust the tower crane ratio and ensure the stable assembly of the pin assembly by locking the connecting pin with the fixing pin. This ratio conversion is simple, safe and reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the dual-cart 2x4 ratio conversion system of this utility model; Figure 2 This is a schematic diagram of the 2x ratio state of the dual-cart 2x4 ratio conversion system of this utility model; Figure 3 This is a schematic diagram of the four-fold rate conversion system of the dual-cart 2x4 ratio conversion according to this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view at point B in the middle; Figure 6 for Figure 3 Enlarged view at point C; Figure 7 Diagram of the lifting rope winding system for a dual-trolley 2x4 ratio conversion system; In the diagram: 1. First luffing trolley, 2. Second luffing trolley, 3. Double pulley frame, 4. Single pulley frame, 5. Connecting plate, 6. Hook, 7. Connecting pin, 8. Cylindrical pin, 9. R-type cotter pin, 10. Pulley frame pin, 11. Connecting lug, 12. First trolley pulley block, 13. Second trolley pulley block; 100. Connecting plate pin assembly; 200. Cart pin assembly; 01. Lifting drum; 02. Force measuring ring; 03. Arm root pulley; 04. Luffing trolley pulley assembly; 05. Hook pulley assembly; 06. Arm end straightener. Detailed Implementation

[0015] 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.

[0016] See appendix Figure 1-7 The dual-trolley 2x4 ratio conversion system includes a first luffing trolley 1, a second luffing trolley 2, and a hook. The first luffing trolley 1 has a first trolley pulley block 12, which is connected to the pulleys on a single pulley frame 4 via a steel wire rope. The second luffing trolley 2 has a second trolley pulley block 13, which is connected to the pulley block on a dual pulley frame 3 via a steel wire rope. Both the first trolley pulley block 12 and the second trolley pulley block 13 contain two pulleys. The hook 6 is hinged to a connecting plate 5. One end of the connecting plate 5 is hinged to the dual pulley frame 3, and the other end of the connecting plate 5 has a corresponding connecting plate mounting pin hole for the single pulley frame 4. The connecting plate 5 and the single pulley frame 4 are detachably connected by assembling the connecting plate pin assembly 100 in the mounting pin hole of the connecting plate; the first luffing trolley 1 and the second luffing trolley 2 are provided with corresponding trolley pin holes on the adjacent side of the frame, and the first luffing trolley 1 and the second luffing trolley 2 are detachably connected by assembling the trolley pin assembly 200 in the trolley pin hole; the connecting plate pin assembly 100 and the trolley pin assembly 200 have the same structure, both including a connecting pin 7 and two fixing pins, namely a cylindrical pin 8 and an R-type cotter pin 9, which are respectively assembled in the through holes at both ends of the connecting pin 7 to prevent the connecting pin 7 from falling off.

[0017] Furthermore, the single pulley frame 4 and the double pulley frame 3 are provided with corresponding connecting ear plates 11 on their adjacent sides. The connecting ear plates are formed with pulley frame pin holes. A set of corresponding connecting ear plates 11 can be stacked to form a connecting ear plate assembly for installing the pulley frame pin shaft 10.

[0018] Furthermore, the single pulley frame 4 and the double pulley frame 3 each have two connecting lugs 11. When the single pulley frame 4 and the double pulley frame 3 are connected, they are assembled and fixed by the two connecting lugs.

[0019] Furthermore, the connecting plate 5 is an isosceles triangle structure. The top corner of the connecting plate 5 is hinged to the hook 6. The hook 6 is located in the middle of the connecting plate 5. One bottom corner of the connecting plate 5 is hinged to the double pulley frame 3. The other bottom corner of the connecting plate 5 is provided with a connecting plate mounting pin hole for connecting to the single pulley frame 4, which is used to install the connecting plate pin assembly 100 to connect to the single pulley frame 4.

[0020] Specifically, when the multiplier of the dual-cart system is four times, the rope winding method is as follows: Figure 7 As shown, the single pulley frame 4 and the double pulley frame 3 are connected to form a whole and the rope is wound according to the hook pulley block 05. The first luffing trolley 1 and the second luffing trolley 2 are connected to form a whole and the rope is wound according to the luffing trolley pulley block 04.

[0021] I. Changing from 4x to 2x The first luffing trolley 1 and the second luffing trolley 2 are separated, the trolley pin assembly 200 remains on the second luffing trolley 2, the single pulley frame 4 and the double pulley frame 3 are separated, the connecting plate 5 is separated from the single pulley frame 4, and the hook 6 is connected to the double pulley frame 3.

[0022] The specific process is as follows: a) Move the two luffing trolleys to the base of the crane boom and open the luffing limit switch; b) Lower the hook 6 and pulley block to the ground and keep them in a vertical position. Remove the connecting plate pin assembly 100 between the connecting plate 5 and the single pulley frame 4. Reinstall the connecting pin 7 of the connecting plate pin assembly 100 on the single pulley frame 4 and fix it with the cylindrical pin 8 and the R-type cotter pin 9.

[0023] c) Manipulate the "rise" action, and the single pulley frame 4 leaves the ground and continues to rise to the positioning fork; d) The first luffing trolley 1 is the rear trolley, and the second luffing trolley 2 is the front trolley. Remove the trolley pin assembly 200 between the first luffing trolley 1 (rear trolley) and the second luffing trolley 2 (front trolley). Then, lock the first luffing trolley 1 (rear trolley) to the boom root using a steel wire rope. Next, move the second luffing trolley 2 (front trolley) towards the boom tip, separating the first luffing trolley 1 (rear trolley) from the second luffing trolley 2 (front trolley). Finally, install the trolley pin assembly 200 onto the first luffing trolley 1 (rear trolley). Figure 2 .

[0024] e) At this point, the mechanism is in a 2x magnification state.

[0025] II. Changing from 2x to 4x The first luffing trolley 1 and the second luffing trolley 2 are connected by a trolley pin assembly 200, the single pulley frame 4 and the double pulley frame 3 are connected by a pulley frame pin 10, and the connecting plate 5 is connected to the single pulley frame 4 by a connecting plate pin assembly 100.

[0026] a) Move the second luffing trolley 2 (front trolley) to the side of the first luffing trolley 1 (rear trolley) at the base of the boom, and untie the wire rope securing the first luffing trolley 1 (rear trolley).

[0027] b) Press the "Magnification Change" button on the console, and then perform the following operations: Pull out the trolley pin assembly 200 on the first luffing trolley 1 (rear trolley), and the trolley moves "reverse" to bring the first luffing trolley 1 (rear trolley) close to the second luffing trolley 2 (front trolley).

[0028] The first luffing trolley 1 (rear trolley) and the second luffing trolley 2 (front trolley) are connected by the trolley pin assembly 200; c) Perform the "lifting and lowering" operation, with the single pulley frame 4 lowering; d) When the single pulley frame 4 reaches the ground, the single pulley frame 4, the hook 6 and the double pulley frame 3 are connected together by the connecting plate pin assembly 100 and the pulley frame pin 10, as shown in Figure 3; e) The tower crane is operating at four times the rated capacity.

[0029] When using a dual-trolley system with a 2-to-4 boom ratio, the lifting capacity can be doubled, but the lifting speed will be halved. Its main advantages are: simplified construction and reduced weight of the luffing trolley and hook pulley block, thereby reducing boom load and increasing the effective lifting capacity at the boom end.

[0030] This type of ratio conversion is more suitable for tower cranes with a lifting capacity of 2500 kN.m or more. Because the double ratio has high working efficiency, the construction site only uses the four ratio when lifting large loads. In the double ratio state, the auxiliary trolley hook is removed, and the ratio conversion device is arranged on the auxiliary trolley. The weight of the auxiliary trolley hook (about 1.5t or more) will be used as the lifting capacity to increase the lifting capacity in the double ratio state, especially the lifting capacity at the boom end.

[0031] It should be noted that the parts of this utility model not described in detail are existing technologies.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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 dual-cart 2x4 ratio conversion system, characterized in that: The system includes a first luffing trolley, a second luffing trolley, and a hook. The first luffing trolley has a first trolley pulley block, which is connected to a pulley on a single pulley frame via a wire rope. The second luffing trolley has a second trolley pulley block, which is connected to a pulley block on a double pulley frame via a wire rope. The hook is hinged to a connecting plate. One end of the connecting plate is hinged to the double pulley frame, and the other end of the connecting plate has a corresponding connecting plate mounting pin hole for the single pulley frame. A connecting plate pin assembly is installed in the mounting pin hole of the connecting plate to achieve a detachable connection between the connecting plate and the single pulley frame; the first luffing trolley and the second luffing trolley are provided with corresponding trolley pin holes on the adjacent side of the frame, and the first luffing trolley and the second luffing trolley are detachably connected by installing a trolley pin assembly in the trolley pin hole; the connecting plate pin assembly and the trolley pin assembly have the same structure, both including a connecting pin and a fixing pin, and the fixing pin passes through the through holes at both ends of the connecting pin to prevent the connecting pin from falling off.

2. The dual-cart 2x4 ratio conversion system according to claim 1, characterized in that: The fixing pin is a cylindrical pin and an R-type cotter pin, which are respectively assembled into the through holes at both ends of the connecting pin shaft.

3. The dual-cart 2x4 ratio conversion system according to claim 1, characterized in that: The single pulley frame and the double pulley frame are provided with corresponding connecting lugs on their adjacent sides. The connecting lugs are formed with pulley frame pin holes. A set of corresponding connecting lugs can be stacked to form a connecting lug assembly for installing pulley frame pins.

4. The dual-cart 2x4 ratio conversion system according to claim 3, characterized in that: The single pulley frame and the double pulley frame each have two connecting lugs, forming two sets of connecting lug assemblies.

5. The dual-cart 2x4 ratio conversion system according to claim 1, characterized in that: The connecting plate has a triangular structure, and its three corners are used to connect a single pulley frame, a double pulley frame, and a hook, respectively.

6. The dual-cart 2x4 ratio conversion system according to claim 1 or 5, characterized in that: The connecting plate is an isosceles triangle structure. The top corner of the connecting plate is hinged to the hook, one bottom corner of the connecting plate is hinged to the double pulley frame, and the other bottom corner of the connecting plate is provided with a connecting plate mounting pin hole for connection with the single pulley frame.

7. The dual-cart 2x4 ratio conversion system according to any one of claims 1-5, characterized in that: When the magnification ratio of the dual-carriage system changes from two times to four times, the first and second luffing carriages are connected by carriage pin assembly, the single pulley frame and the double pulley frame are connected by pulley frame pin, and the connecting plate is connected to the single pulley frame by connecting plate pin assembly.

8. The dual-cart 2x4 ratio conversion system according to any one of claims 1-5, characterized in that: When the magnification ratio of the dual-trolley system changes from four times to two times, the first luffing trolley and the second luffing trolley separate, the trolley pin assembly remains on the second luffing trolley, the single pulley frame and the double pulley frame separate, the connecting plate separates from the single pulley frame, and the hook is connected to the double pulley frame.

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