CN201882820U - Automatic jacking device for buffer rod of variable-amplitude auxiliary arm of wheel crane - Google Patents

Abstract

The utility model relates to an automatic jacking device for a luffing jib buffer rod of a wheeled crane, which belongs to the automatic jacking device for a wheeled crane. The automatic jacking device includes a rear support, a vertical plate, a pin shaft, a strut, a chute and a front support. One end of the front support and the rear support is connected by a connecting piece. There is a vertical plate in the middle of the rear support. There is a strut at the middle position of the rear bracket, and one end of the strut is connected with the vertical plate of the rear bracket by a bearing pin, and the other end of the strut is connected on the chute of the rear bracket. One end of the strut is connected to the vertical plate, and the other end is connected to the chute. This bracket can ensure that when the luffing jib is raised and lowered, the strut will slide along the groove on the chute. When raising and lowering the jib, it plays a supporting and guiding role in the front and rear brackets, effectively improving the safety of the luffing jib under the working conditions of raising and lowering the jib. Advantages: There is no need to use auxiliary cranes to operate, reducing manpower; greatly reducing the risk of accidents and ensuring the personal safety of workers.

Description

Automatic jacking device for buffer rod of luffing jib of wheeled crane

technical field

The utility model relates to an automatic jacking device of a wheeled crane, in particular to an automatic jacking device for a luffing jib buffer rod of a wheeled crane.

Background technique

The luffing jib is the operating part of the construction crane, which is composed of a connecting frame, an installation component, a large intermediate section, a transition section, a small intermediate section, the last section arm and various pull plate assemblies. The installation components play the role of connecting the preceding and the following during the operation of the luffing jib, and bear a huge load. It is composed of connecting frame, bottom joint arm, front bracket, rear bracket and each pull plate assembly.

The luffing jib is the operating part of the construction crane. Boom lifting process: the wire rope is retracted through the luffing winch to drive the luffing pulley block, the rear bracket of the installation component is pulled up, the rear bracket pulls up the front bracket through a foldable pull plate, and then drives various jibs through a series of pull plate combinations Combine work. The drop arm state is the opposite. When lifting the boom, it often happens that the pull plate is stuck due to the pin stuck and cannot be folded. At this time, the staff needs to go up to forcibly remove it, which will cause the sudden release of the pull plate due to the force, and the sudden downward pressure of the rear bracket, which often causes accidents of crushing the staff. In order to effectively improve the safety of the luffing jib under lifting and lowering conditions, it is necessary to add a device between the front and rear brackets to prevent the sudden movement of the rear bracket.

In order to improve the operation performance and satisfy the lifting and hoisting of heavy objects, the ultra-large crane is equipped with a luffing jib. Both the front and rear brackets are designed as box-shaped local reinforced structures, which are very heavy (the front bracket is not less than 2500Kg, and the rear bracket is not less than 3500Kg), and the front and rear brackets are connected by tie plates. The front and rear brackets are overlapped during transportation, and the front and rear brackets are opened during operation. Due to the heavy weight of the front and rear brackets, accidents such as mutual jamming between the pull plates and the extrusion of the staff during operation are often caused when the arms are raised and lowered.

Disadvantages: First, under the condition of redundant cranes, it is necessary to use auxiliary cranes for operation, which increases manpower, material resources, and financial resources; Risk of accident.

Utility model content

The purpose of this utility model is to provide an automatic jacking device for the luffing jib buffer rod of a wheeled crane, which solves the problem that when there is an auxiliary crane, the auxiliary crane is required for auxiliary operations; when there is no auxiliary crane, the problem of risky operation is required .

The purpose of this utility model is achieved in that the automatic jacking device includes a rear bracket, a vertical plate, a bearing pin, a strut, a chute and a front bracket, and one end of the front bracket and the rear bracket is connected by a connecting frame, and the rear bracket There is a riser in the middle of the front bracket and a strut in the middle of the front bracket and the rear bracket. One end of the strut is connected with the vertical plate of the rear bracket through a pin, and the other end of the strut is connected to the chute of the front bracket.

Beneficial effect, due to the adoption of the above solution, a strut is added in the luffing jib mounting assembly, that is, between the front bracket and the rear bracket. Connect one end of the support rod to the vertical plate in the rear bracket through a pin shaft, and the other end is connected to a chute on the front bracket, and a support rod and a chute are added between the front and rear brackets. When the luffing jib is raised and lowered, the strut will slide along the groove on the chute, and the luffing jib plays a supporting and guiding role in the front and rear brackets when the luffing jib is raised and lowered, effectively improving the The safety of luffing jib raising and lowering conditions.

It solves the problem that when there is an auxiliary crane, the auxiliary crane needs to carry out auxiliary operations; when there is no auxiliary crane, the problem of risky operation is required, and the purpose of the utility model is achieved.

Advantages: There is no need to use auxiliary cranes to operate, which reduces manpower, material resources, and financial resources; when there is no auxiliary crane, there is no need for staff to go up and forcibly dismantle risky operations, which greatly reduces the risk of accidents and ensures the personal safety of workers.

Description of drawings

Fig. 1 is the structural diagram of the utility model embodiment.

In the figure, 1, rear bracket; 2, vertical plate; 3, pin shaft; 4, strut; 5, chute; 6, front bracket; 7, bottom section arm; 8, skid.

Detailed ways

Embodiment 1: The automatic jacking device includes a rear bracket 1, a vertical plate 2, a pin shaft 3, a strut 4, a chute 5, a front bracket 6, a bottom section arm 7 and a skid 8;

One end of the front bracket 6 and the rear bracket 1 is connected by a connecting frame, a vertical plate 2 is arranged at the middle position of the rear bracket 1, a strut 4 is arranged at the middle position of the front bracket 6 and the rear bracket 1, and one end of the strut 4 is passed through a pin Axle 3 is connected with vertical plate 2 of rear support 1, and the other end of strut 4 is connected on the chute 5 of front support 6.

When lifting, the rear bracket 1 is pulled up by the steel wire rope, and the strut 4 slides in the chute 5 due to its own weight to prevent the rear bracket 1 from swinging back and forth during the lifting process; when the rear bracket 1 and the front bracket 6 are connected to the bottom joint After the pull plates between the arms 7 are all straightened, the luffing hoist is operated, so that the bottom joint arm 7 falls on the skid 8 on the ground.

Claims (1)

1. An automatic jacking device for the luffing jib buffer rod of a wheeled crane, characterized in that: the automatic jacking device includes a rear bracket, a vertical plate, a bearing pin, a strut, a chute and a front bracket, and the front bracket and the front bracket One end of the rear bracket is connected by a connecting frame, there is a vertical plate in the middle of the rear bracket, and a strut is arranged in the middle of the front bracket and the rear bracket, and one end of the strut is connected with the vertical plate of the rear bracket through a pin shaft, and the vertical plate of the strut The other end is connected to the slide groove of the front bracket.

Images