Luffing mechanism is the key load component of rotary drilling rig. The diversity of construction conditions of rotary drilling rig determines the complexity of bearing capacity of luffing mechanism. The luffing mechanism of the current mainstream brand of rotary drilling machine mainly uses the "parallelogram" (also known as the "four link" mechanism) and the "big triangle type" two types, the two structures were applied to the corresponding conditions, have their own advantages.

Generally, the "parallelogram" luffing mechanism of rotary drilling rig in the disassembly and transportation more convenient, the flexibility is better than the "triangle" structure; accordingly, the bearing structure of the difference, "four link" mechanism of rotary drilling in hard rock, the stability of the "big triangle" the structure slightly inferior.

How to balance the advantages of the two kinds of structure respectively, so as to achieve the maximum in the complex condition of stability and flexibility, and can have a powerful hard rock drilling capacity? Shanghai Jintai SD36 multifunctional drilling machine is a rotary drilling rig in agile warrior". SD36 multi-function drilling rig has the following technical characteristics:

1) a new generation of special chassis for rotary drilling: the power of the engine is 299kw (Euro III standard). The lower chassis widens, the weight increases, and the center of gravity is lower, ensuring the stability of the body when entering the rock;

2) high power head: speed speed control, the drilling efficiency is high; the power head carriage with long guide unilateral three groups of wear-resistant structure, ensure the drilling verticality; at the same time, has a double buffer system, effectively reduce the impact of power head;

3) main hoist: the rapid confluence technology, the maximum speed of 70m/min; at the same time with high and low speed configuration, effectively improve drilling efficiency;

4) energy saving: hydraulic system adopts multi pump string, parallel mode, as well as large diameter, large flow of the main valve configuration, reasonable power distribution, to maximize the output power of the main valve, reduce the loss of useless;

5) the slewing braking capacity is 50000Nm, which is suitable for large diameter deep pile construction in complex formation;

6) superposition type standard counterweight: adopting superposition counterweight, the structure of the whole machine is more compact, and the counterweight configuration can be flexibly added and added according to actual working conditions;

7) on the basis of the original SD32, the design of the four connecting rod structure and the hydraulic system of the oil cylinder has been comprehensively upgraded, and the lifting capacity of the cylinder has been greatly improved.