Novel pin shaft dismounting device for tower crane

Abstract

A novel pin shaft dismounting device for a tower crane comprises a sleeve connected to the outer side of the end of a pin shaft in a sleeving mode, at least one set of clamping arms capable of moving in the radial direction are arranged in the sleeve, one end of each clamping arm is used for clamping the pin shaft, the other end of each clamping arm is connected with an operating rod, and one end of each operating rod is connected with the corresponding clamping arm through a linkage device. The other end of the operating rod extends to the outer side of the sleeve, and a reset spring is arranged between the two clamping arms in the same set. According to the novel pin shaft dismounting device for the tower crane, an operator is allowed to directly and manually operate through the built-in clamping arm and the operating rod, clamping and releasing can be rapidly achieved, dependence on complex tools is reduced, and the operation process is greatly simplified; operation is visual and simple, and training time and cost are reduced; and the disassembly time of a single pin shaft is obviously shortened, so that the overall working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to a pin disassembly device for a new type of tower crane. Background Art

[0002] Existing pins are mainly used in construction machinery. In particular, almost all fasteners of tower cranes are connected by pins. First of all, pins are convenient for installation and disassembly because the assembly and disassembly of tower cranes need to be carried out frequently. Especially at construction sites, as the building rises, the crane also climbs continuously. As a fast and reliable connection method, pins can simplify this process and improve work efficiency. By simply inserting or removing a pin, the connection or separation of structural members can be achieved without complex tools or excessive manpower. Moreover, it can meet the requirements of different working conditions. The construction working conditions during the use of tower cranes are relatively complex. They not only face changes in aspects such as wind force and load, but also need to face the damage to tower cranes caused by seawater corrosion. The pin connection has a certain elasticity and adjustability, which can absorb and relieve the stress and vibration caused by these external factors to a certain extent. And because the pins are treated against rust during the manufacturing process, they can also well cope with the rust-prone environment, thereby improving the stability and safety of the crane. In addition, if a pin is defective or damaged, it can be easily replaced to ensure the reliability and safety of the crane.

[0003] The connecting pins of tower cranes are mostly interference or transition fits. During assembly, methods such as press fitting, cold fitting or hot fitting are mostly used. However, due to the fact that materials are not absolutely rigid and there will be elastic deformation, the contact pressure between the pin and the pin hole is too large. This will cause the pin to be deformed under force during long-term use, the deformation of the hinge hole caused by the release of internal stress in the connecting piece, and the rust of the pin and the connecting piece, making it time-consuming and laborious to disassemble the pin.

[0004] At present, there are mainly the following three pin disassembly methods: (1) Directly use mechanical or hydraulic pin pulling devices, or the method of hitting with heavy objects for removal. (2) Use mechanical processing methods to drill or bore the entire pin. (3) Use methods such as gas cutting to destroy the oil cylinder or structural members for removal. The first method will not only cause the structural member to be deformed or even scrapped under force, but also endanger the safety of surrounding personnel, with high labor intensity and low efficiency. The second method has great difficulty in fixing the machine tool and high machining costs. The third method will cause the waste of connecting pieces such as oil cylinders and structural members, and the disassembly cost is too high, resulting in unnecessary cost expenditure. Generally speaking, although the existing pin disassembly technology can meet the engineering requirements to a certain extent, there are still deficiencies in terms of safety, efficiency, cost and technical applicability. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a new type of pin disassembly device for tower cranes that is convenient to operate and has good effects.

[0006] The utility model is realized by the following technical scheme: a new type of pin disassembly device for tower cranes, including a sleeve sleeved on the outer side of the end of the pin. At least one group of clamping arms that can move radially is arranged in the sleeve. One end of the clamping arm is used to clamp the pin, and the other end of the clamping arm is connected with an operating rod. One end of the operating rod is connected with the clamping arm through a linkage device, and the other end of the operating rod extends outside the sleeve. A return spring is arranged between two clamping arms in the same group.

[0007] Furthermore, the material of the sleeve is high-strength alloy.

[0008] One end of the clamping arm used to clamp the pin is a clamping tip.

[0009] The linkage device is a welded structure.

[0010] The clamping arm is welded to the operating rod. The clamping arm and the operating rod are not collinear, and the welding part of the clamping arm and the operating rod is hinged in the sleeve through a pin.

[0011] The linkage device is a gear transmission group.

[0012] The gear transmission group includes a gear I and a gear II that are meshed together. The gear I is fixed to the clamping arm, and the gear II is fixed to the operating rod.

[0013] A fixing plate is horizontally connected to the sleeve, and the centers of the gear I and the gear II are hinged to the fixing plate through a fixing shaft.

[0014] The utility model has the following advantages: The new type of pin disassembly device for tower cranes of the utility model allows the operator to directly manually operate through the built-in clamping arm and operating rod, can quickly realize clamping and releasing, reduces the dependence on complex tools, and greatly simplifies the operation process; the operation is intuitive and simple, reducing the training time and cost; significantly shortens the disassembly time of a single pin, thereby improving the overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings, as a part of the utility model, are used to provide a further understanding of the utility model. The schematic embodiments and descriptions of the utility model are used to explain the utility model, but do not constitute an improper limitation to the utility model. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0016] In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the present utility model.

[0018] In the figure: 1. Clamping arm, 2. Operating rod, 3. Sleeve, 4. Fixed shaft, 5. Fixed plate, 6. Return spring.

[0019] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] Such as Figure 1A novel pin disassembly device for tower crane shown in the figure comprises a sleeve 3 sleeved on the outer side of the pin end, at least one group of clamping arms 1 movable in the radial direction is arranged in the sleeve 3, one end of the clamping arm 1 is used to clamp the pin, the other end of the clamping arm 1 is connected with an operating rod 2, one end of the operating rod 2 is connected with the clamping arm 1 through a linkage device, the other end of the operating rod 5 extends outside the sleeve 3, and a reset spring 6 is arranged between the two clamping arms 1 in the same group. The novel pin disassembly device for tower crane of the utility model comprises a sleeve that can be sleeved on the end of the pin, which can be used for pins of different sizes and shapes, at least one group of clamping arms is arranged inside the sleeve, these clamping arms can move radially inward and tightly grasp the surface of the pin; at the same time, in order to realize the precise control of the clamping arm, the device also comprises an operating rod, one end of the operating rod is connected with the clamping arm through a linkage device, and the other end extends outside the sleeve, which is convenient for the operator to hold and use. When in use, the operating rod is pushed by manpower, and driven by the linkage device, one end of the clamping arm expands outward, and the other end clamps the pin shaft; similarly, after releasing the operating sense, the clamping arm will loosen, allowing the pin shaft to be freely disengaged, so that after multiple operations, the pin shaft can be disassembled; and in order to ensure that the operating rod and the clamping arm can work stably and continuously, a reset spring is added to the device. The reset spring is located between the two clamping arms, and its function is to automatically push the clamping arm back to the original position after the operating rod is released, which is convenient for use. The device of the utility model makes the entire disassembly process smoother, and the operator does not need to manually adjust the position of the clamping arm, which simplifies the disassembly and assembly process of the pin shaft, improves maintenance efficiency and reduces labor intensity, and greatly improves work efficiency.

[0024] like Figure 1 The novel pin disassembly device for tower crane shown in the figure has a sleeve 3 made of a high-strength alloy. The sleeve of the utility model is made of a high-strength alloy and is both reliable and flexible, and can be applied to pins of different sizes and shapes.

[0025] like Figure 1 The present invention shows a novel pin disassembly device for tower cranes, wherein one end of the clamping arm 1 for clamping the pin is a gripping tip. The end of the clamping arm in contact with the pin is a gripping tip, and this design takes into account the principle of mechanics to ensure that the pin can be firmly tightened even when subjected to a large load without slipping or damaging the pin.

[0026] like Figure 1A novel pin disassembly device for tower cranes as shown, the linkage device is of welded structure. The clamping arm 1 is welded to the operating rod 2. The clamping arm 1 and the operating rod 2 are not collinear. The welding joint between the clamping arm 1 and the operating rod 2 is hinged in the sleeve 3 through a pin. In the present utility model, the clamping arm and the operating rod are welded together, and there is a certain angle between the clamping arm and the operating rod. The welding joint is hinged in the sleeve through a pin. By rotating the operating rod, the operating rod can be rotated around the hinge point, thereby gripping the pin and driving the pin to undergo an axial displacement, realizing the rapid disassembly of the pin, which is convenient and efficient.

[0027] As Figure 1 A novel pin disassembly device for tower cranes as shown, the linkage device is a gear transmission group. The gear transmission group includes a gear I and a gear II that mesh together. The gear I is fixed to the clamping arm 1, and the gear II is fixed to the operating rod 2. A fixing plate 5 is horizontally connected to the sleeve 3. The centers of the gear I and the gear II are hinged to the fixing plate 5 through a pin 4. In the present utility model, the linkage device is a gear transmission group. A gear is fixedly connected to each of the clamping arm and the operating rod. The power transmission between the clamping arm and the operating rod is realized through the gears. The gear II connected to the operating rod is the driving wheel. The operating rod outputs power to drive the gear II to rotate. The gear I rotates in the opposite direction under the drive of the gear II, and then drives the clamping arm to rotate around the fixed axis, realizing the clamping of the pin and driving the pin to achieve an axial displacement, achieving the purpose of rapid disassembly.

[0028] The novel pin disassembly device for tower cranes of the present utility model has versatility and adaptability. Since the sleeve and the clamping arm can be adjusted according to pins of different specifications, the device can be widely applied to the pins at various positions of the tower crane. As long as there is a pin, this rapid disassembly device can be used to complete the task. In actual application, the operator only needs to align the sleeve with the end of the pin, and then operate the operating rod through simple pushing and pulling actions to realize the rapid disassembly and assembly of the pin. The whole process does not require other additional tools, reducing the operation steps and saving valuable time. At the same time, because the operation of the device is simple and intuitive, even ordinary staff without professional skills can quickly master the usage method, reducing the dependence on professional technical personnel. In summary, the pin rapid disassembly device provided by the present utility model not only improves the efficiency and convenience of pin disassembly and assembly, but also performs excellently in terms of safety and universality.

[0029] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0030] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features contained in other embodiments rather than other features, the combination of the features of different embodiments also means that it is within the protection scope of the present utility model and forms different embodiments. For example, in the above embodiments, those skilled in the art can use them in a combined manner according to the known technical solutions and the technical problems to be solved by this application.

[0031] The above description is only a preferred embodiment of the present utility model and does not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with the preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications to the above-mentioned technical content using the hints provided above to form equivalent embodiments of equivalent changes. However, as long as the content does not depart from the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A new type of pin disassembly device for tower crane, characterized in that: The invention comprises a sleeve (3) sleeved on the outside of the end of a pin shaft, wherein at least one group of clamping arms (1) movable in the radial direction is arranged in the sleeve (3), one end of the clamping arm (1) is used to clamp the pin shaft, the other end of the clamping arm (1) is connected to an operating rod (2), one end of the operating rod (2) is connected to the clamping arm (1) through a linkage device, the other end of the operating rod (2) extends outside the sleeve (3), and a return spring (6) is arranged between two clamping arms (1) in the same group.

2. A novel pin disassembly device for tower crane according to claim 1, characterized in that: The material of the sleeve (3) is a high-strength alloy.

3. A novel pin disassembly device for tower crane according to claim 1, characterized in that: One end of the clamping arm (1) used for clamping the pin is a clamping tip.

4. A novel pin disassembly device for tower crane according to claim 1, characterized in that: The linkage device is a welded structure.

5. A novel pin disassembly device for tower crane according to claim 4, characterized in that: The clamping arm (1) and the operating rod (2) are welded together; the clamping arm (1) and the operating rod (2) are not colinear; and the welding point between the clamping arm (1) and the operating rod (2) is hinged in the sleeve (3) via a pin.

6. A novel pin disassembly device for tower crane according to claim 1, characterized in that: The linkage device is a gear transmission group.

7. A novel pin disassembly device for tower crane according to claim 6, characterized in that: The gear transmission group comprises a gear I and a gear II meshing together, the gear I being fixed together with the clamping arm (1), and the gear II being fixed together with the operating rod (2).

8. A novel pin disassembly device for tower crane according to claim 7, characterized in that: A fixing plate (5) is transversely connected to the sleeve (3), and the centers of the gears I and II are hinged to the fixing plate (5) via a fixing shaft (4).

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