01803-01824 Structural Characteristics and Working Principle of Wheel Bulldozer Working Device D9N 1"x90

The wheel-type bulldozer is a construction machine with strong working condition adaptability, which is modified based on the chassis of a conventional wheel loader.

Compared with crawler bulldozers, it can complete earthwork operations such as pushing, excavating, leveling, and backfilling at higher speed and efficiency. Meanwhile, it features high maneuverability and flexibility, making it quite convenient to transfer between construction sites. Therefore, it is widely used in civil construction, road construction, airport and dyke construction, mineral mining, port and wharf construction, farmland renovation, and national defense engineering projects.

Compared with wheel loaders, its structure and manufacturing process are relatively simple. The biggest difference lies in the structure and working principle of the working device. The basic structure and working principle of this device are briefly introduced below.

The working device of the wheel bulldozer, like that of the wheel loader, is of a front-mounted type. Due to significant changes in its structural shape and connection method, the front frame of the wheel bulldozer needs to be redesigned.

As can be seen from the figure above, the working device of the wheel bulldozer consists of the following components: a dozer blade assembly, two dozer blade connecting brackets, two boom arms, a left-right adjustable horizontal push rod assembly, vertical support rods, lift cylinders, and tilt cylinders. Among them:

These connections integrate all components into an organic whole, enabling the dozer blade to achieve two functions: lifting/lowering and left-right tilting.

(1) The dozer blade weldment adopts a straight-blade enclosed structure design, which greatly enhances the overall strength and rigidity of the dozer blade. It is sturdy, reliable, and durable, making it most suitable for the working condition of overburden stripping in primary soil layers.

(2) The dozer blade assembly and five wear-resistant blades are fastened with countersunk bolts, facilitating replacement when the blades are worn. Meanwhile, the blades are made of special wear-resistant materials resistant to low-temperature cold brittleness, which is suitable for rock-based working environments in cold regions and effectively extends the service life of the dozer blade assembly.

(3) The left and right boom arms are designed in a box-type structure, featuring light weight, high strength, and good rigidity, which can well meet the operation requirements.

(4) An adjustable horizontal push rod assembly and vertical support rods are adopted to adjust the pitch angle and tilt angle of the blades. This ensures the blades maintain a certain cutting angle and spatial position, allowing the dozer blade of the wheel bulldozer to operate normally under different soil conditions and sites.D9N 1"x90

(5) As shown in Figure 1, the dozer blade assembly and the left-right boom arms adopt a "TT"-shaped assembly structure. This design distributes the load on the dozer blade more evenly (helping protect the blade) and makes it easier to achieve the soil-cutting angle of the blades.01803-01824

(6) The entire working device is optimized through CAD technology. Its structural components are reasonably designed, with good force-bearing conditions at all parts, and advanced technical parameters and performance indicators. The dozer blade can lift, lower, and tilt flexibly, stably, and reliably, with high operation efficiency—reaching the first-class level of domestic similar working devices.