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Changsong excavator quick hitch
Excavator Attachment-quick coupler (quick hitch)
The quick coupler of the excavator is also called the quick hitch. It is installed at the front end of the excavator work device. It can quickly complete replacement of various Excavator Attachments such as buckets, breakers, rippers, hydraulic shear log grabber, stone grabber without manual disassembly of the pin. It can make the excavator to expand various operations such as crushing, shearing, clearing, compaction, milling, pushing, pinching, grabbing, scraping, loosening, lifting, etc. The changing process of attachment is simple, safe and reliable, saves time, and it greatly improves the working efficiency of the excavator.
Category of excavator quick coupler
According to the product structure and function level, the quick coupler can be divided into two categories. One type has a simple structure and only has a quick change connection function, which is called ordinary quick coupler; The first category has simple structure and only has the function of quick change connection, which is called ordinary quick coupler. The other kind not only has the function of fast connection, but also increases the degree of freedom. Only ordinary quick couplers are introduced here. The ordinary quick coupler is divided into mechanical and hydraulic type according to the driving method.
Working principle of hydraulic quick coupler
The hydraulic quick coupler mainly fixes and releases the pins 1 and 2 by the action of the cylinder. When the working part needs to be replaced, the cylinder is retracted, the hook-shaped clamp moves from the position of 1 to the position of 2, the quick coupler is disengaged, and the other working parts are replaced, and the hook-type clamp is turned on after the pin is closed, and the cylinder is opened again. The hook-shaped clamp moves from the position of 2 to the position of 1 to lock the work fitting pin. Of course, except for this, there are external oil circuits and solenoid valves working at the same time. It is recommended to select hydraulic quick coupler if the weight of excavators was over 13T.
Working principle of mechanical quick coupler
There are a variety of types for mechanical quick coupler, but only two types are commonly used, they are a plug type and a screw type. The principle of the plug-type quick coupler is that when the working part needs to be replaced, the wedge card is first pulled out, the T-shaped buckle is knocked in, and the quick-coupler is separated from the bucket. When changing to the required working part, the T-shaped buckle is pulled back, and the wedge-shaped card is inserted into the T-shaped buckle for locking. Screw structure is simple and easy to operate, it needs to be replaced by manual operation mechanism, usually adopts spring locking method. Due to the restriction of manual unlocking force, the spring force can not be too large, it is easy to cause the lock hook to loose, and it is necessary to set safety. Devices such as pins are generally widely used on small excavators. It is recommended to select mechanical quick coupler if the weight of excavator was below 13 tons .
Installation of excavator quick coupler
1. The mechanical installation method is the same as the installation method of the bucket. It is very convenient.
2. Hydraulic installation requires a set of pipes, a solenoid valve, and an electromagnetic switch.
The future trend for Excavator attachment
More than 90% of excavators abroad are equipped with quick coupler, which have become the standard configuration of excavators just like bucket and crushing hammers. In particular, it is very common to use excavators attachments in northern Europe, South Korea and other countries. As the domestic accessory industry is still in the introduction period, in addition to the crushing hammer market has begun to take shape, the application of other attachments mostly stays at the primary level, and its convenience and efficiency have not been widely recognized and accepted. It has only been promoted and applied in China in the past few years, and it has developed rapidly. Many products and technologies come from abroad. The universal quick connector is still in the development and cultivation period in China, and will be used quickly in the next few years.
It will be the golden time for the development of excavator attachment in next few years. The quick coupler will bear the brunt, become the main product in the excavator attachment, and bring more convenience and efficiency to excavator users.
For more information,please contact me:
Jining Changsong Construction Machinery Co., Ltd
Wechat: +86 17753399529