Fixing device for maintenance of variable-amplitude cradle of portal crane

Abstract

The utility model discloses a portal crane variable-amplitude cradle maintenance fixing device, which belongs to the field of portal crane variable-amplitude cradle maintenance and comprises a supporting rod main body and a supporting base. The supporting rod body is connected with the supporting base through a pin shaft, and the supporting base comprises a main arm frame supporting base welded to a main arm frame and a variable amplitude platform supporting base welded to a variable amplitude platform. One end of the supporting rod main body is connected with the main arm frame supporting base, and the other side of the supporting rod main body is connected with the variable amplitude platform supporting base. The main arm frame connected with the main arm frame supporting base and the variable-amplitude platform connected with the variable-amplitude platform supporting base are in hard connection, so that the safe supporting effect is achieved, the device can be used repeatedly, gas cutting treatment does not need to be conducted on a welding part after maintenance is finished, and time and labor are saved. And meanwhile, the influence of repeated maintenance and repeated welding and stress on the steel structure is avoided.

Description

Technical Field

[0001] The utility model relates to a maintenance and fixing device for a luffing cradle of a gantry crane, belonging to the field of maintenance of luffing cradles of gantry cranes. Background Art

[0002] The luffing cradle is one of the core components of the port container crane (gantry crane), which is responsible for adjusting the inclination of the crane's main arm in order to change the operating radius of the hook. This mechanism allows the crane to operate effectively at different heights and positions to adapt to changing loading and unloading requirements. The luffing cradle is usually composed of multiple hydraulic or electric mechanical devices, and the complexity of its design and operation requires that maintenance work must be precise and efficient.

[0003] When repairing the luffing cradle of a gantry crane, technicians usually need to use two 160mm channel steels and two handheld welding machines to weld and fix the main boom of the gantry crane to the luffing platform. This process requires the cooperation of four people. However, in actual operation, the main boom and the luffing platform are connected by channel steel, and the welding speed is slow, resulting in waste of manpower and materials. At the same time, since the channel steel is heavy, there is a risk of falling when workers lift the channel steel to fix it. Therefore, it not only consumes a lot of manpower and material resources, but also prolongs the overall maintenance time.

[0004] In addition, frequent welding operations will generate welding stress on the steel structure of the gantry crane's main boom. Welding stress will damage the integrity and stability of the structure and cause damage to the parent material, affecting the long-term use and safety of the crane. At the same time, after the maintenance is completed, gas cutting is required to remove excess welds. This step is also time-consuming and labor-intensive, increasing the complexity of the maintenance work. Utility Model Content

[0005] In order to solve the shortcomings of the prior art, the purpose of the utility model is to provide a gantry crane luffing cradle maintenance and fixing device, which solves the problem that the main boom and the luffing platform are connected by channel steel in the prior art, the welding speed is slow, and the waste of manpower and materials is caused; at the same time, since the channel steel is heavy, there is a risk of falling when workers lift the channel steel to fix it.

[0006] In order to achieve the above-mentioned objectives, the utility model adopts the following technical solutions: a gantry crane luffing cradle maintenance and fixing device, comprising a strut body and a support base; the strut body is connected to the support base via a pin shaft, and the support base comprises a main boom support base welded to the main boom and a luffing platform support base welded to the luffing platform; one end of the strut body is connected to the main boom support base, and the other side of the strut body is connected to the luffing platform support base.

[0007] Furthermore, the support rod body includes a first support rod body and a second support rod body, and the first support rod body and the second support rod body adopt a split structure.

[0008] Furthermore, the first support rod body and the second support rod body are connected via a lead screw.

[0009] Furthermore, the first support rod body and the second support rod body are respectively seamless steel pipes.

[0010] Furthermore, the first support rod body and the second support rod body are provided with internal threads that cooperate with the lead screw.

[0011] Furthermore, the support base includes a connecting end and a supporting end; the connecting end is perpendicular to the supporting end; the connecting end is connected to the first support rod body and the second support rod body, and the supporting end is connected to the main boom and the luffing platform.

[0012] Furthermore, the supporting end is in a rectangular parallelepiped structure as a whole.

[0013] Furthermore, the connecting end is in a triangular structure as a whole.

[0014] Beneficial effects achieved by the utility model:

[0015] The support rod body of the utility model is connected with the support base by pins, so that the main boom connected to the main boom support base and the variable amplitude platform connected to the variable amplitude platform support base are hard-connected, thereby achieving the effect of safe support and can be used multiple times. After maintenance, there is no need to perform gas cutting on the welding parts, which saves time and effort. At the same time, the support base adopts a one-time welding method, which is respectively welded at the back of the main boom and the variable amplitude platform, avoiding repeated welding during multiple maintenance and the influence of stress on the steel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the pin structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the support base of the variable amplitude platform of the utility model;

[0019] Figure 4 It is a schematic diagram of the use state of the utility model.

[0020] The meanings of the reference numerals in the figure are: 1. first support rod body; 2. second support rod body; 3. lead screw; 4. main boom support base; 5. pin shaft; 6. variable amplitude platform support base. DETAILED DESCRIPTION

[0021] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings, but is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0022] refer to Figure 1-4 As shown, the utility model provides a gantry crane luffing cradle maintenance and fixing device, including a strut main body and a support base; the strut main body is connected to the support base through a pin shaft 5, and the support base includes a main boom support base 4 welded to the main boom and a luffing platform support base 6 welded to the luffing platform; one end of the strut main body is connected to the main boom support base 4, and the other side of the strut main body is connected to the luffing platform support base 6; when in use, this device has a total of 2 sets, which are respectively located on the left and right sides of the main boom, thereby forming a gantry crane luffing cradle maintenance device; the utility model uses the strut main body and the support base through pin connection and cooperation, so that the main boom connected to the main boom support base 4 and the luffing platform position connected to the luffing platform support base 6 are hard-connected, thereby achieving a safe support effect, and can be used multiple times, and there is no need to gas cut the welding parts after the maintenance is completed, which saves time and effort; at the same time, the support base adopts a one-time welding method, which is respectively welded at the back of the main boom and the luffing platform, avoiding repeated welding for multiple maintenances and the influence of stress on the steel structure.

[0023] Furthermore, the support rod body includes a first support rod body 1 and a second support rod body 2, and the first support rod body 1 and the second support rod body 2 are connected by a screw 3 to form a fixing device as a whole to achieve a supporting effect; in this embodiment, the first support rod body 1 and the second support rod body 2 adopt a split structure, which can facilitate the disassembly of the fixing device and the lifting of maintenance personnel.

[0024] The first support rod body 1 and the second support rod body 2 are respectively seamless steel pipes. When connected with the lead screw 3, the first support rod body 1 and the second support rod body 2 are provided with internal threads matching with the lead screw, thereby facilitating the connection of the first support rod body 1 and the second support rod body 2.

[0025] The support base includes a connecting end and a supporting end; the connecting end is perpendicular to the supporting end, and the supporting end is an overall rectangular structure for easy connection with the supporting end, the main boom and the variable amplitude platform, and the connecting end is an overall triangular structure for easy installation of the pin shaft 5 and connection with the first support rod body 1 and the second support rod body 2.

[0026] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A maintenance and fixing device for a gantry crane luffing cradle, characterized in that: It comprises a support rod body and a support base; the support rod body is connected to the support base via a pin shaft (5); the support base comprises a main boom support base (4) welded to the main boom and a variable amplitude platform support base (6) welded to the variable amplitude platform; one end of the support rod body is connected to the main boom support base (4), and the other side of the support rod body is connected to the variable amplitude platform support base (6).

2. The door crane luffing cradle repair and fixing device according to claim 1 is characterized in that: The support rod body comprises a first support rod body (1) and a second support rod body (2), and the first support rod body (1) and the second support rod body (2) adopt a split structure.

3. The door crane luffing cradle maintenance and fixing device according to claim 2 is characterized in that: The first support rod body (1) and the second support rod body (2) are connected via a lead screw (3).

4. The door crane luffing cradle repair and fixing device according to claim 3 is characterized in that: The first support rod body (1) and the second support rod body (2) are respectively seamless steel pipes.

5. The door crane luffing cradle repair and fixing device according to claim 4 is characterized in that: The first support rod body (1) and the second support rod body (2) are provided with internal threads that cooperate with the lead screw (3).

6. The door crane luffing cradle repair and fixing device according to claim 4 is characterized in that: The support base comprises a connecting end and a supporting end; the connecting end is perpendicular to the supporting end; the connecting end is connected to the first support rod body (1) and the second support rod body (2), and the supporting end is connected to the main boom and the luffing platform.

7. The door crane luffing cradle repair and fixing device according to claim 6 is characterized in that: The supporting end is in a rectangular parallelepiped structure as a whole.

8. The door crane luffing cradle repair and fixing device according to claim 6 is characterized in that: The connecting end is in a triangular structure as a whole.

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