Excavator attachments are constantly being updated, and more and more types appear, but troubles follow, and it is too laborious to replace the attachments. The high-efficiency excavator quick coupler are adapted to adapt, also known as high-efficiency quick-change joints. They are installed at the front end of the excavator’s working device, which can quickly complete the replacement of various excavator attachments without manual disassembly of the pin shaft, so that the excavator can be expanded. Crushing, cutting, clearing, compacting, milling, pushing, pinching, grabbing, scraping, loosening, hoisting and other operations, the whole attachment replacement process is simple, safe and reliable, saves time and greatly improves The working efficiency of the excavator.

1. Classification of efficient and quick connectors for excavators

Divided from the product structure and function level, efficient excavator quick coupler can be divided into two categories, one is simple in structure and only has the function of quick change connection, called ordinary quick change; the other not only has the function of quick connection, but also adds If the degree of freedom of the attachment is reduced, it is called the universal quick connection. Here we only introduce ordinary quick connectors. Ordinary quick connectors are divided into two types: mechanical and hydraulic according to the driving method.

2. Working principle of hydraulic efficient quick connector

The hydraulic high-efficiency quick-change joint is mainly to fix and loosen the pin shafts 1 and 2 by the action of the oil cylinder. When the working parts need to be replaced, the oil cylinder retracts, the hook-shaped pressing block moves from position 1 to position 2, the quick-change joint is disengaged, and other working parts are replaced. After the hook-shaped pressing block is aligned with the pin shaft, the oil cylinder is opened again , the hook-shaped pressing block moves from the position of 2 to the position of 1 to lock the pin shaft of the working accessory. Of course, in addition to this, the external oil circuit and the solenoid valve work at the same time. It is recommended that excavators above 13T choose hydraulic excavator quick coupler.

3. The working principle of mechanical efficient excavator quick coupler

Mechanical high-efficiency excavator quick coupler joints are also divided into many types, and there are two commonly used ones, one is a pin type, and the other is a screw type. The principle of the pin-type quick change is that when it is necessary to replace the working parts, first pull out the wedge-shaped card, knock the T-shaped buckle inward, and the quick-change joint is separated from the bucket. When changing to the required working parts, the T-shaped buckle is pulled back, and the wedge-shaped card is inserted into the T-shaped buckle to lock. Screw-type structure, the product structure is simple and easy to operate, it needs to use the human operation mechanism to realize the replacement of the working device, usually adopts the spring locking method, due to the constraint of the manual unlocking force, the spring force should not be too large, it is easy to cause the lock hook to loosen, and a safety lock must be installed Devices such as pins are generally widely used on small excavators. It is recommended that excavators below 13 tons choose a mechanical high-efficiency excavator quick coupler.