A multi-articulated pin axle holder

Abstract

The utility model provides a kind of multi-joint pin shaft support device, belong to engineering machinery technical field.Solve the space interference of traditional fixed pin shaft support, high cost and poor versatility and other technical problems.The technical scheme is as follows:including ear plate mounting seat welded in tower crane main structure, and groove steel seat, channel steel and pin shaft support are sequentially connected by movable shaft rotation;Pin shaft support is circular arc structure, its open end side is equipped with the rotating baffle with protruding block, the other side is equipped with the notch for protruding block to be inserted, for stabilizing oil cylinder when hydraulic jacking.The utility model realizes the flexible adjustment of position and angle by multi-joint hinged design, effectively avoids space interference;It is overall detachable and reusable, and pin shaft support is replaceable module, can adapt to different size pin shaft, with high flexibility, good economy and strong versatility Significant effect.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a multi-joint type pin support device. Background Technology

[0002] During the installation, lifting, and maintenance of tower cranes, the insertion and removal of pins is a frequent and critical heavy-duty operation. Due to the large weight of the pins (up to hundreds of kilograms) and the high precision requirements for installation, a pre-welded fixed pin support is commonly used on site: a metal component with an arc-shaped groove is welded near the pin hole to support the pin, and then a hydraulic cylinder is used to push it into or out of the pin hole.

[0003] However, this traditional fixed welded pin support has many inherent drawbacks. First, it has poor spatial adaptability: its rigid structure cannot be adjusted in position and angle, and in densely structured areas such as standard tower sections, it is prone to interference with web members, connecting plates, etc., making it difficult to align the pin with the pin hole. This not only makes operation time-consuming and labor-intensive, but may also damage the equipment due to forced operation. Second, it has poor economic efficiency: each pin point requires a separate pin support to be welded, consuming a large amount of steel and welding time. For large tower cranes with hundreds of connection points, the material and labor costs throughout its entire life cycle are considerable. Third, it lacks versatility: a pin support of a certain specification can usually only fit pins of a specific size. When dealing with pins of different diameters, special brackets need to be customized and welded, resulting in a wide variety of spare parts, complex management, and low flexibility. Fourth, it poses safety and aesthetic hazards: the large pin support permanently retained after welding not only affects the overall aesthetics of the tower, but is also prone to collisions and scratches with other components during equipment transportation and use, bringing potential risks.

[0004] Therefore, there is an urgent need in this field for a new type of pin support device that is space-adjustable, reusable, and adaptable to various pin specifications, in order to overcome the drawbacks of traditional technologies and meet the needs of efficient, economical, and safe operation. Utility Model Content

[0005] The purpose of this utility model is to overcome the problems in the background art and provide a multi-joint pin support device.

[0006] This invention addresses the problems of spatial interference, high cost, and poor versatility inherent in traditional fixed pin supports by proposing a multi-joint pin support device. Its core concept lies in the multi-joint hinge design between the ear plate mounting base, channel steel base, channel steel, and pin support, enabling flexible adjustment of the pin support's spatial position and angle, effectively avoiding interference. Furthermore, the device is detachable and reusable, and can be adapted to different sized pins by replacing the pin support components, thereby significantly improving operational efficiency, reducing costs, and enhancing versatility.

[0007] To achieve the aforementioned objectives, the present invention employs the following technical solution: a multi-joint type pin support device, comprising:

[0008] Ear plate mounting base, used for welding and fixing to the main structure of the tower crane;

[0009] The channel steel seat has one end rotatably connected to the ear plate mounting seat via a first movable shaft and a cotter pin;

[0010] One end of the channel steel is rotatably connected to the other end of the channel steel seat via a second movable shaft and a cotter pin.

[0011] The pin support has one end rotatably connected to the other end of the channel steel via a third movable shaft and a cotter pin.

[0012] A rotating baffle is rotatably connected to one side of the open end of the pin support;

[0013] The pin support has an arc-shaped structure with a platform on one side of its open end. The platform is used to install the rotating baffle. The other side of the pin support has a notch, and the rotating baffle has a protrusion. After rotation, the protrusion is inserted into the notch to stabilize the position of the hydraulic cylinder when the hydraulic cylinder pushes the pin.

[0014] Furthermore, the channel steel seat has a curved structure to increase the joint's range of motion. This design effectively solves the technical problem that the pin support is difficult to position around obstacles in extremely narrow or tricky working spaces, enabling the device to adapt to more complex working conditions and greatly improving its space avoidance capabilities.

[0015] Furthermore, the pin support is connected to the channel steel via an arc-shaped connector, which has a shaft hole for mounting a third movable shaft. This design increases the distance between the connection point of the pin support and the channel steel, solving the technical problem of potential swaying or insufficient stability of the pin support when bearing heavy pins, thereby enhancing the overall structural rigidity and operational stability.

[0016] Furthermore, the connections between the ear plate mounting base, the channel steel base, the channel steel, and the pin support are all detachable structures, achieved by disassembling the cotter pin and the movable shaft. This detachable structure directly addresses the technical deficiency of traditional welded pin supports that cannot be reused, allowing the device to be easily disassembled and used in the next workstation after completing one operation, greatly improving equipment utilization and significantly reducing the cost per use.

[0017] Furthermore, the arc-shaped structure of the pin holder is adapted to the shape of the pin to be installed, and the pin holder is a replaceable structure to accommodate pins of different sizes. This feature fundamentally solves the technical problem of poor versatility of traditional pin holders, where one specification can only fit one type of pin. By replacing pin holders of different sizes, various operational needs can be quickly adapted, reducing the types of spare parts and storage costs, and achieving "one machine for multiple uses".

[0018] Furthermore, the rotating baffle can be retracted when not in operation, avoiding interference with other structures. This design solves the technical problem of fixed baffles easily colliding and scratching with other components during equipment transportation or storage, reducing the risk of equipment damage and improving the safety and portability of the device.

[0019] Furthermore, the ear plate mounting base is smaller than that of traditional pin supports, so welding does not affect the appearance of the tower body, and it is less likely to cause structural scratches during installation and disassembly. By adopting a miniaturized ear plate mounting base, the technical pain points of traditional large pin supports being permanently welded to the tower body, affecting aesthetics and easily causing bumps and knocks, are effectively solved, making the main structure cleaner and reducing potential damage to the tower body paint and structure.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The primary advantage of this multi-joint pin support device lies in its significantly improved operational flexibility and spatial adaptability. Through the multi-joint hinge structure formed between the ear plate mounting base, channel steel base, channel steel, and pin support, the device can be flexibly adjusted in multiple directions and angles. This design allows the pin support to cleverly bypass obstacles such as tower body web members and connecting plates, effectively solving the technical problem of interference easily occurring in narrow spaces with traditional fixed pin supports. Even in complex working conditions, operators can easily and accurately adjust the pin support to the optimal working position, thereby greatly improving the success rate and efficiency of pin insertion and removal operations.

[0022] The second significant advantage of this invention lies in its outstanding economy and reusability. This device abandons the outdated "one hole, one weld" method, requiring only a small ear plate mounting base to be welded to the main structure of the tower. The entire multi-joint mechanism can be disassembled and reused at different workstations. This not only greatly reduces steel consumption but also fundamentally eliminates the significant labor and time required for individual welding at each pin point. Considering the total life-cycle cost of the equipment, this invention significantly reduces the procurement, installation, and maintenance costs of the pin support, achieving cost reduction and efficiency improvement.

[0023] The third key benefit of this invention lies in its superior versatility and scalability. By designing the pin support as a modular, quickly replaceable component and equipping it with an adjustable rotating baffle, a single main joint mechanism can accommodate pins of various diameters simply by replacing the pin supports of different specifications. This effectively solves the pain point of traditional solutions requiring the customization of numerous dedicated brackets due to varying pin sizes, significantly reducing the complexity of spare parts inventory and management. This "one machine, multiple uses" characteristic greatly broadens the applicability of the device, enabling it to flexibly meet the needs of different equipment models and various operational tasks. Attached Figure Description

[0024] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0025] Figure 1 This is a schematic diagram of the structure of the multi-joint pin support device of this utility model.

[0026] Figure 2 This is a schematic diagram of the multi-joint pin support device of this utility model in use, wherein... Figure 2 (a) is a first-person view diagram of the installation process. Figure 2 (b) is a schematic diagram of the second perspective during the installation process.

[0027] The attached figures are labeled as follows: 1. Channel steel seat; 2. Channel steel; 3. Pin support; 4. Rotating baffle; 5. Ear plate mounting seat; 6. Tower crane main structure; 7. Platform; 8. Notch; 9. Protrusion; 10. Bow-shaped connector; 11. Pin. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0029] Example

[0030] See Figures 1 to 2 The multi-joint pin support device in this embodiment is mainly composed of ear plate mounting seat 5, channel steel seat 1, channel steel 2, pin support 3 and rotating baffle 4.

[0031] The ear plate mounting base 5 serves as the connection foundation between this device and the main structure 6 of the tower crane. It is a metal plate, much smaller than a traditional pin support, and is fixedly installed in a predetermined position on the main structure, such as the standard section of the tower body, by welding. Its main function is to provide a standardized connection interface. Its miniaturized design avoids the impact of permanent large components on the aesthetics of the tower body and also reduces the impact and scratches on the tower body during welding and subsequent use.

[0032] The channel steel seat 1, as the first movable joint of the entire multi-joint mechanism, is rotatably connected to the ear plate mounting seat 5 at one end via the first movable shaft and cotter pin. The channel steel seat 1 is designed with a curved structure, and this unique shape gives it a larger swing angle, thus providing the entire mechanism with a wider space obstacle avoidance capability from the initial stage, enabling it to bypass the dense web members or connecting plates of the tower body.

[0033] The channel steel 2 serves as a connecting member, with one end rotatably connected to the other end of the channel steel seat 1 via a second movable shaft and a cotter pin, forming a second movable joint. The length of the channel steel 2 can be determined according to actual needs, and its function is to extend the working radius and further transfer the adjustment range from the channel steel seat 1 to the pin support 3 at the end.

[0034] The pin support 3 is the core component that directly supports and positions the pin 11. It is connected to the other end of the channel steel 2 via an arc-shaped connector 10. Specifically, the arc-shaped connector 10 is welded to the pin support 3 and has a shaft hole. It is rotatably connected to the channel steel 2 through a third movable shaft and a cotter pin, forming a third movable joint. This arc-shaped connection design increases the lever arm and effectively enhances the structural rigidity and stability of the pin support 4 when bearing the heavy pin 11. The body of the pin support 3 has an arc-shaped structure, and its concave arc surface is adapted to the shape of the pin 11 to be installed, ensuring that the pin 11 is securely supported and aligned with the pin hole.

[0035] A crucial rotating baffle 4 is located at the open end of the pin support 3. A platform 7 is provided on one side of the open end of the pin support 3, and the rotating baffle 4 is mounted there via a pivot. A notch 8 is provided on the other side of the open end of the pin support 3. A protrusion 9 is provided on the rotating baffle 4. When it is necessary to fix the hydraulic cylinder, the rotating baffle 4 is rotated to the working position, and the protrusion 9 fits precisely into the notch 8, forming a stable groove to resist the protrusion on the hydraulic cylinder housing, preventing it from retracting during the jacking process, thus ensuring the stability of the thrust stroke. After the operation is completed, the rotating baffle 4 can be rotated back to avoid becoming an interference point.

[0036] Most importantly, all the above connections (ear plate mounting base 5 and channel steel base 1, channel steel base 1 and channel steel 2, channel steel 2 and pin support 3) are achieved through movable shafts and cotter pins. This detachable connection method is the core of the device's reusability. At the same time, the pin support 3 itself is also a modular component that can be quickly replaced. When different diameter pins 11 need to be installed, only the cotter pins and movable shaft need to be removed to replace the original pin support with a compatible one, achieving extremely high versatility.

[0037] Work process

[0038] First, weld the ear plate mounting base 5 to the appropriate position on the main structure 6 of the tower crane. When the pin 11 needs to be installed, install the assembled multi-joint mechanism (channel steel seat 1, channel steel 2, pin support 3) on the ear plate mounting base 5 via a movable shaft and cotter pin. Then, the operator adjusts the angles of the three joints to precisely move the pin support 3 directly below the pin hole. Place the heavy pin 11 into the arc-shaped groove of the pin support 3, aligning its axis with the pin hole. Next, install the hydraulic cylinder, ensuring its push rod contacts the end face of the pin 11, and engages the protrusion on its housing behind the rotating baffle 4, which has been rotated to the working position. Activate the hydraulic cylinder; with the effective obstruction of the rotating baffle 4, the cylinder smoothly pushes the pin 11 into the pin hole. After installation, remove the hydraulic cylinder, rotate the rotating baffle 4 back, and then disassemble the entire multi-joint mechanism, leaving only the small ear plate mounting base 5 on the main structure. This device can be stored for reuse at the next work station.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-joint type pin support device, characterized in that, include: Ear plate mounting base (5) is used for welding and fixing to the main structure (6) of the tower crane; The channel steel seat (1) is rotatably connected at one end to the ear plate mounting seat (5) via a first movable shaft and a cotter pin; One end of the channel steel (2) is rotatably connected to the other end of the channel steel seat (1) via a second movable shaft and a cotter pin; The pin support (3) is rotatably connected at one end to the other end of the channel steel (2) via a third movable shaft and a cotter pin. Rotate baffle (4), which is rotatably connected to one side of the opening end of the pin support (3); The pin support (3) is an arc-shaped structure with a platform (7) on one side of its open end. The platform (7) is used to install the rotating baffle (4). The other side of the pin support (3) has a notch (8). The rotating baffle (4) has a protrusion (9). After rotation, the protrusion (9) is inserted into the notch (8) to stabilize the position of the hydraulic cylinder when the hydraulic cylinder pushes the pin (11).

2. The multi-joint pin support device according to claim 1, characterized in that, The channel steel seat (1) has a curved structure to increase the joint's range of motion.

3. The multi-joint pin support device according to claim 1, characterized in that, The pin support (3) is connected to the channel steel (2) through the bow-shaped connector (10), and the bow-shaped connector (10) has a shaft hole for installing the third movable shaft.

4. The multi-joint type pin support device according to claim 1, characterized in that, The connections between the ear plate mounting seat (5), the channel steel seat (1), the channel steel (2) and the pin support (3) are all detachable structures, and separation is achieved by disassembling the cotter pin and the movable shaft.

5. A multi-joint type pin support device according to claim 1, characterized in that, The arc-shaped structure of the pin support (3) is adapted to the shape of the pin (11) to be installed, and the pin support (3) is a replaceable structure to accommodate pins (11) of different sizes.

6. The multi-joint type pin support device according to claim 1, characterized in that, The rotating baffle (4) can be rotated and retracted when not in operation to avoid interfering with other structures.

7. A multi-joint type pin support device according to claim 1, characterized in that, The ear plate mounting base (5) is smaller than the traditional pin support. After welding, it does not affect the appearance of the tower body, and it is not easy to cause structural scratches during installation and disassembly.

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