CN201165453Y - Automatic Jacking Device for Crawler Crane Tower Arm Buffer Rod - Google Patents

Abstract

The utility model relates to an automatic tower boom buffer bar lift-up device for a caterpillar crane, which belongs to the automatic buffer bar lift-up device for the crane. The buffer bar lift-up device comprises a tower type fly jib (1), a main jib (2), a buffer bar (3) and an automatic buffer bar lifter (4); the tower type fly jib is connected at the upper side end of the main jib, a locking groove is arranged on one side of the tower type fly jib, and the buffer bar lifter is connected on the tower type fly jib; the top end of the main jib is connected with one end of the buffer bar, and the other end of the buffer bar is arranged on one side of the tower type fly jib. The automatic buffer bar lift-up device has the advantages of simple structure and reliable work and is easy to operate without external force; the self weight of a heavy hammer is adopted as the power to maintain a bracket to support the buffer bar to move to the correct position during the operation process of the whole machine; the retroversion action of the tower type fly jib is effectively avoided the self weight of the heavy hummer at one end of the bracket is utilized and no additional device is required, thus saving labor force and improving efficiency. .

Description

Automatic Jacking Device for Crawler Crane Tower Arm Buffer Rod

technical field

The utility model relates to an automatic jacking device for a buffer rod of a crane, in particular to an automatic jacking device for a tower-type jib buffer rod of a crawler crane.

Background technique

When a crawler crane is equipped with a tower jib, a buffer bar is generally used to prevent the tower jib from receding. When the tower jib is lowered, the angle between the tower jib and the main jib will be less than a certain angle, which will hinder the jib drop. At present, foreign crawler cranes use electronic sensors and hydraulic cylinders to control the angle of the buffer rod. The mechanism is complicated and the cost is high. In China, steel ropes are used to limit the angle of the buffer rod, which is difficult to operate and low in efficiency. The reclining effect is poor, and it cannot automatically move to a suitable position when the arm is lowered. When the arm is lowered, the buffer rod needs to be manually disassembled, which is time-consuming and laborious.

Utility model content

The purpose of this utility model is to provide a crawler that can control the recoil effectively when the tower jib is at a large angle, can automatically move to a suitable position when the arm is lowered, and does not need to manually disassemble the buffer rod when the arm is lowered. Automatic jacking device for crane tower arm buffer rod.

The purpose of this utility model is achieved in that the buffer rod jacking device includes a tower auxiliary arm (1), a main arm (2), a buffer rod (3) and a buffer rod automatic jacking device (4); The side end of the upper part of the tower is connected with a tower jib, and there is a stop slot on one side of the tower jib, and a buffer automatic jack is connected to the tower jib, and one end of the buffer bar is connected to the top of the upper part of the main arm. , the other end of the buffer rod is located on one side of the tower jib.

The buffer rod automatic jacking device includes a bracket and a weight, the weight is connected to one end of the bracket, and there is a reamed hole in the middle of the bracket.

Beneficial effect: due to the adoption of the above scheme, the self-weight of the weight on the bracket is used as the power to maintain the bracket to support the buffer bar to move to the correct position when the whole machine is in operation. When the buffer bar falls with the tower jib and approaches the tower jib When the boom is at the bottom of the boom, the bracket automatically lifts the buffer rod through the action of gravity, so that the angle between the buffer rod and the tower jib will no longer continue to shrink, so that it will no longer hinder the movement of the tower jib and realize the smoothness of the tower jib. Falling safely; when the tower jib is raised, due to the weight of the bracket weight itself, the bracket no longer hinders the buffer bar from braking the tower jib, and the effect of controlling the back tilt is good when the tower jib is at a large angle , it can automatically move to a suitable position in the state of dropping the arm, and there is no need to manually disassemble the buffer rod when the arm is falling, which achieves the purpose of the utility model. Advantages: The buffer rod jacking device has simple structure, reliable operation, easy operation, no external force, and uses the weight of the hammer as the power to maintain the bracket to support the buffer rod to move to the correct position during the operation of the whole machine, effectively preventing The backward tilting action of the tower jib is eliminated, and the buffer rod automatic jacking device utilizes the weight of the weight at one end of the bracket without additional devices, which saves manpower and improves efficiency.

Description of drawings

Fig. 1 is the structural diagram of the whole vehicle applying the utility model

Fig. 2 is an enlarged view of the enlarged view of part A in Fig. 1 of the present utility model.

Fig. 3 is a structural diagram of the tower jib of the utility model.

Fig. 4 is a structural diagram of the utility model buffer rod automatic jacking device.

Detailed ways

The buffer rod jacking device includes a tower jib 1, a main arm 2, a buffer rod 3, and a buffer rod automatic jacking device 4. A tower jib is connected to the side end of the upper part of the main arm. There is a stop groove on one side, and a buffer automatic jacking device is connected to the tower jib, and one end of the buffer rod is connected to the top of the upper part of the main boom, and the other end of the buffer rod is located on one side of the tower jib.

The buffer rod automatic jacking device includes a bracket and a weight, the weight is connected to one end of the bracket, and there is a reamed hole in the middle of the bracket.

The tower jib 1 is connected to the main jib 2 through a hinge point. In order to prevent the tower jib 1 from being too backward and cause the vehicle to become unstable, a buffer bar 3 is added between the tower jib 1 and the main jib 2 to support the tower. Jib and its accessories. The buffer rod automatic jack 4 is connected on the tower jib 1 through a hinge point.

The working principle of the automatic jacking device:

1. When the tower jib 1 drops, as the angle α between the tower jib 1 and the main jib 2 gradually decreases, the free end of the buffer rod 3 gradually approaches the stop on the side of the tower jib 1 If there is no buffer rod automatic jacking device 4, as α gradually decreases, the buffer rod 3 will completely push against the stop groove on the side of the tower jib 1, and the arm cannot continue to drop, that is, α continues to decrease. Small; after adding the buffer automatic jack 4 device, with the decrease of α, the buffer automatic jack 4 rotates to an angle around its own hinge point through the action of the weight of the weight on the buffer rod automatic jack 4 , thereby supporting the buffer rod 3 to prevent its free end from abutting against the stop groove on one side of the tower jib 1 . Thereby eliminating the damage caused by the mutual extrusion of the tower jib 1 and the buffer rod 3 due to the smaller angle when the jib 1 and the buffer rod 3 are in the drop-arm state.

2. Under working conditions, when the elevation angle of the tower jib 1 gradually increases, that is, its working process is opposite to that of the drop jib, and as the included angle α decreases, the main jib 3 is supported by the buffer rod automatic jacking device 4 to slow down. Slowly approach the tower jib 1, when the included angle decreases to a certain angle, the free end of the buffer rod 3 contacts the stop groove on the tower jib 1, after contact, the buffer rod automatic jacking device 4 continues to move due to gravity. Rao hinge point rotates, and this moment buffer rod 3 disengages with buffer rod automatic jacking device 4, when buffer rod 3 moves to the end point along the stop groove slideway, start anti-dipping action.

Claims (2)

1. An automatic jacking device for a tower arm buffer rod of a crawler crane, the buffer rod jacking device includes a tower jib (1), a main arm (2), and is characterized in that it also includes a buffer rod (3) and a buffer rod Rod automatic jacking device (4); a tower jib is connected to the side end of the upper part of the main boom, and there is a stop slot on one side of the tower jib, and a buffer automatic jacking device is connected to the tower jib , one end of the buffer rod is connected to the top of the upper part of the main boom, and the other end of the buffer rod is located on one side of the tower jib. 2. The automatic jacking device for the buffer rod of the crawler crane tower arm according to claim 1, wherein the automatic jacking device for the buffer rod includes a bracket and a weight, and the weight is connected to one end of the bracket. There is a reamed hole in the middle of the bracket.

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