Hinged shaft type connecting structure suitable for flexible supporting leg of gantry crane

Abstract

The invention discloses a hinged shaft type connecting structure suitable for a flexible supporting leg of a gantry crane, which comprises an upper hinged support, a base plate, a hinged shaft, a lining and a lower hinged support, the upper hinged support is connected with a gantry main beam, the lower hinged support is connected with the flexible supporting leg, two ends of the hinged shaft respectively penetrate through the upper hinged support and the lower hinged support and are movably connected with the upper hinged support and the lower hinged support, and the lining is arranged on the base plate. And the bushing sleeves the periphery of the end part of the hinged shaft. The technical problems that in the prior art, a flexible supporting leg of a portal crane is huge in structure and large in occupied space are solved, and meanwhile the cost of the crane is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lifting machinery, and in particular to a hinged-axis connection structure suitable for flexible legs of a gantry crane. Background Art

[0002] Gantry cranes are important mechanical equipment widely used in many industries and logistics stations. They have the ability to carry objects horizontally and vertically within a specific space. They play an indispensable role in cargo loading and unloading, manufacturing and other fields, greatly improving logistics efficiency and the convenience of production operations.

[0003] In the prior art, the structure of a gantry crane is mainly composed of a gantry steel structure, a lifting mechanism, a running mechanism, and other parts. Among them, the gantry steel structure is its core supporting part, including a main beam, two rigid legs, and two flexible legs. The main beam bears the main load-bearing task, while the rigid legs and flexible legs provide stable support for the entire structure. The flexible legs play the role of auxiliary support and adapting to certain deformation in the structure, and the connection method between them and the main beam has an important impact on the performance of the entire crane.

[0004] However, the current mainstream connection method between the flexible legs and the main beam is welding or bolting, which has obvious defects. During the operation of the crane, the flexible legs need to bear complex loads including the weight of the objects hung by the hook, dynamic loads, and inertia force. Under the existing connection method, in order to ensure the safety and reliability of the structure, the flexible legs have to be designed with a larger cross-sectional area. This not only makes the flexible legs themselves bulky and occupies more space, but also increases the weight and cost of the entire crane. Summary of the invention

[0005] The embodiment of the present application solves the technical problem in the prior art that the flexible legs of the gantry crane have a bulky structure and occupy a large space by providing a hinged-axis connection structure suitable for the flexible legs of the gantry crane, while reducing the cost of the crane itself.

[0006] In order to solve the above technical problems, the present invention adopts the following technical scheme, a hinge-shaft connection structure suitable for the flexible support leg of a gantry crane, which includes an upper hinge seat, a pad, a hinge shaft, a bushing and a lower hinge seat, the upper hinge seat is connected to the main beam of the gantry, the lower hinge seat is connected to the flexible support leg, the two ends of the hinge shaft respectively pass through the upper hinge seat and the lower hinge seat and are movably connected with the upper hinge seat and the lower hinge seat, and the bushing is sleeved on the outer periphery of the end of the hinge shaft.

[0007] The upper hinge seat is connected to the main beam of the portal frame, and the lower hinge seat is connected to the flexible leg. The hinge shaft runs through the upper hinge seat and the lower hinge seat and is movably connected to the two, thus constructing a basic flexible leg hinge shaft connection framework. This makes the flexible leg a two-force rod with simple force and is not affected by horizontal forces. This can optimize the cross-sectional area of ​​the flexible leg, reduce the deadweight of the flexible leg, and make the windward area smaller, thereby reducing the impact of wind on the crane structure, increasing the stability and safety of the crane under high-speed operation and open-air operation, and reducing procurement costs.

[0008] Furthermore, the upper hinge seat includes an upper hinge seat body and an upper connecting portion arranged on the upper hinge seat body, the upper connecting portion is used to be fixedly connected to the portal main beam, and the upper hinge seat body is provided with an upper shaft hole for accommodating the hinge shaft.

[0009] Furthermore, the lower hinge seat includes a lower hinge seat body and a lower connecting portion arranged on the lower hinge seat body, the lower connecting portion is used to be fixedly connected to the flexible support leg, and the lower hinge seat body is provided with a lower shaft hole for accommodating the hinge shaft, and the lower shaft hole corresponds to the upper shaft hole; thereby, the coaxiality of the hinge shaft can be ensured when passing through the upper and lower hinge seats, thereby improving the accuracy and reliability of the connection structure.

[0010] Furthermore, both ends of the hinge shaft are provided with limiting structures for preventing the hinge shaft from axial movement.

[0011] Furthermore, the limiting structure is a shaft clamping plate, which is radially clamped on the outside of the hinge shaft and fixed to the lower hinge seat; thereby, problems such as connection failure and component damage caused by axial movement of the hinge shaft can be avoided, thereby ensuring the normal operation of the crane under complex working conditions.

[0012] Furthermore, two axle clamping plates are fixed on each lower hinge seat, and the axle clamping plates are strip-shaped plates. Through holes are provided on the axle clamping plates for passing bolts, and the bolts are fixed to the lower hinge seat after passing through the through holes. The axle clamping plates are strip-shaped, have a simple structure, strong versatility, are easy to process, manufacture and install, and reduce production costs while ensuring the limiting function.

[0013] Furthermore, the pad is an annular structure, and its inner diameter is larger than the diameter of the hinge shaft. The pad is arranged between the upper hinge seat and the axle clamping plate and between the axle clamping plate and the lower hinge seat. Therefore, when the crane is in operation, especially when it is subjected to a large load or vibration, the pad can effectively reduce the impact force between the components, extend the maintenance period of the connection structure, and improve the durability of the connection structure.

[0014] Furthermore, the bushing is a wear-resistant bushing made of bronze or nylon.

[0015] It can be seen from the above technical solutions that the present invention has at least the following technical effects or advantages: The upper hinge seat is connected to the main beam of the portal frame, and the lower hinge seat is connected to the flexible leg. The hinge shaft runs through the upper hinge seat and the lower hinge seat and is movably connected to the two, thus constructing a basic flexible leg hinge shaft connection framework. This makes the flexible leg a two-force rod with simple force and is not affected by horizontal forces. This can optimize the cross-sectional area of ​​the flexible leg, reduce the deadweight of the flexible leg, and make the windward area smaller, thereby reducing the impact of wind on the crane structure, increasing the stability and safety of the crane under high-speed operation and open-air operation, and reducing procurement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 Sectional view along AA; Figure 3 It is a structural schematic diagram of the clamping shaft plate and the lower hinge seat in the present invention.

[0017] Explanation of the reference numerals: 1. upper hinge seat, 2. pad, 3. clamping shaft plate, 4. hinge shaft, 5. bushing, 6. lower hinge seat. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0019] The present invention discloses a hinge-shaft connection structure suitable for a flexible support leg of a gantry crane, which is used for connecting the flexible support leg of the gantry crane with the main beam of the gantry. First, it includes an upper hinge seat 1, a pad 2, a hinge shaft 4, a bushing 5 and a lower hinge seat 6. Among them, the upper hinge seat 1 is connected to the main beam of the gantry. The upper hinge seat 1 includes an upper hinge seat body and an upper connecting portion for connecting the main beam, and an upper shaft hole is provided on the upper hinge seat body. In one example, high-strength bolts can be used to tightly fix the main beam, and the lower hinge seat 6 is used to connect the flexible support leg, which includes a lower hinge seat body and a lower connecting portion. The lower connecting portion is used to be fixedly connected to the flexible support leg, and the lower hinge seat body is provided with a lower shaft hole for accommodating the hinge shaft 4, and the lower shaft hole corresponds to the upper shaft hole of the upper hinge seat body.

[0020] The hinge shaft 4 is a component that enables the flexible support leg to rotate relative to the main beam. The two ends of the hinge shaft 4 respectively penetrate the upper hinge seat 1 and the lower hinge seat 6 and are movably connected with the upper hinge seat 1 and the lower hinge seat 6. The bushing 5 is sleeved on the outer periphery of the end of the hinge shaft 4. The inner diameter of the bushing 5 is tightly fitted with the surface of the hinge shaft 4, which can not only reduce the friction and wear between the hinge shaft 4 and the corresponding hinge seat, but also buffer vibration to a certain extent, thereby extending the service life of the entire connection structure. In addition, the bushing 5 is a wear-resistant bushing, and its material can be bronze or nylon.

[0021] Among them, the upper hinge seat 1 is connected to the main beam of the portal frame, the lower hinge seat 6 is connected to the flexible leg, and the hinge shaft 4 runs through the upper hinge seat 1 and the lower hinge seat 6 and is movably connected to the two, thus constructing a basic flexible leg hinge shaft connection frame. In this way, the flexible leg becomes a two-force rod, which is simple to bear force and is not affected by horizontal force. Therefore, the cross-sectional area of ​​the flexible leg can be optimized, the deadweight of the flexible leg can be reduced, and the windward area can be made smaller, thereby reducing the impact of wind on the crane structure, increasing the stability and safety of the crane under high-speed operation and open-air operation, and reducing the procurement cost.

[0022] In this embodiment, limiting structures are provided at both ends of the hinge shaft 4 to prevent its axial movement. In this embodiment, the clamping shaft plate 3 is used as the limiting structure. The clamping shaft plate 3 is in the shape of a strip plate, which has a suitable thickness and width to ensure sufficient strength and rigidity. Two clamping shaft plates 3 are installed on each lower hinge seat 6. The clamping shaft plates 3 are radially clamped on the outside of the hinge shaft 4 and fixed to the lower hinge seat 6 by bolts. The clamping shaft plates 3 can avoid problems such as connection failure and component damage caused by axial movement of the hinge shaft 4, thereby ensuring the normal operation of the crane under complex working conditions. Moreover, the clamping shaft plate 3 is in the shape of a strip, which is convenient for processing, manufacturing and installation, and reduces the production cost while ensuring the limiting function.

[0023] The backing plate 2 is arranged between the upper hinge seat 1 and the clamping shaft plate 3 and between the clamping shaft plate 3 and the lower hinge seat 6. The backing plate 2 adopts an annular structure, and its inner diameter is slightly larger than the diameter of the hinge shaft 4 to ensure that it will not hinder the rotation of the hinge shaft 4 after installation. The backing plate 2 can provide a buffer between the components, disperse the pressure, and prevent the components from being damaged prematurely due to local stress concentration.

[0024] Taking a 41t load container gantry rail crane as an example, when the traditional flexible legs are welded or bolted to the main beam, the weight of a single leg reaches 16t. After applying the hinged shaft connection structure of the present invention, after calculation and actual measurement, the weight of a single leg is reduced to 9.8t, and the total amount is reduced by 38.8%. This weight reduction effect not only reduces the material cost, but also reduces the load on the crane during operation. At the same time, since the connection structure of the present invention has a smaller cross-sectional area, the windward area is also reduced accordingly. In actual operation, especially in high-speed operation and open-air working environments, the impact of wind on the crane is significantly reduced. In addition, the smaller cross-sectional area further reduces procurement costs and improves the overall economy and competitiveness of the crane.

[0025] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in their embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novelties disclosed herein.

Claims

1. A hinged shaft connection structure suitable for a gantry crane flexible support leg, characterized in that: The hinge comprises an upper hinge seat (1), a pad (2), a hinge shaft (4), a bushing (5) and a lower hinge seat (6); the upper hinge seat (1) is connected to the main beam of the door frame; the lower hinge seat (6) is connected to the flexible support leg; the two ends of the hinge shaft (4) respectively pass through the upper hinge seat (1) and the lower hinge seat (6) and are movably connected to the upper hinge seat (1) and the lower hinge seat (6); and the bushing (5) is sleeved on the outer periphery of the end of the hinge shaft (4).

2. The hinge-axis connection structure suitable for the flexible legs of a gantry crane according to claim 1, characterized in that: The upper hinge seat (1) comprises an upper hinge seat body and an upper connecting portion arranged on the upper hinge seat (1) body, the upper connecting portion being used for fixed connection with the portal frame main beam, and an upper shaft hole for accommodating a hinge shaft (4) being provided on the upper hinge seat (1) body.

3. The hinged-axis connection structure suitable for the flexible legs of a gantry crane according to claim 2, characterized in that: The lower hinge seat (6) comprises a lower hinge seat body and a lower connecting portion arranged on the lower hinge seat (6) body, the lower connecting portion being used for fixed connection with the flexible support leg, and the lower hinge seat (6) body being provided with a lower shaft hole for accommodating the hinge shaft (4), the lower shaft hole corresponding to the upper shaft hole.

4. A hinge-axis connection structure suitable for a flexible leg of a gantry crane according to any one of claims 1 to 3, characterized in that: Both ends of the hinge shaft (4) are provided with limiting structures for preventing the hinge shaft (4) from moving axially.

5. The hinge-axis connection structure suitable for the flexible legs of a gantry crane according to claim 4, characterized in that: The limiting structure is a shaft clamping plate (3), which is radially clamped on the outside of the hinge shaft (4) and fixed to the lower hinge seat (6).

6. The hinge-axis connection structure suitable for the flexible legs of a gantry crane according to claim 5, characterized in that: Two axle clamping plates (3) are fixed to each lower hinge seat (6), wherein the axle clamping plates (3) are strip-shaped plates and are provided with through holes for passing bolts. The bolts are fixed to the lower hinge seat (6) after passing through the through holes.

7. The hinge-axis connection structure suitable for the flexible legs of a gantry crane according to claim 6, characterized in that: The backing plate (2) is an annular structure, the inner diameter of which is greater than the diameter of the hinge shaft (4); the backing plate (2) is arranged between the upper hinge seat (1) and the clamping shaft plate (3) and between the clamping shaft plate (3) and the lower hinge seat (6).

8. The hinge-axis connection structure suitable for the flexible legs of a gantry crane according to claim 1, characterized in that: The bushing (5) is a wear-resistant bushing made of bronze or nylon.

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