The high technological barriers in the cross roller bearing industry and the emerging demand for humanoid robots

 The high technological barriers in the cross roller bearing industry and the emerging demand for humanoid robots

The cross roller bearing industry has high technological barriers, and the field of humanoid robots is its emerging demand side Compared with ordinary bearings, cross roller bearings have advantages such as strong load-bearing capacity, high rotational accuracy, good rigidity, and long service life. As a precision transmission component, cross roller bearings are widely used in heavy machinery, humanoid robots, machine tools, automated production lines, and other fields.

Cross roller bearings are typically composed of lubrication systems, retainers, sealing structures, inner and outer rings, rolling elements, and other components. The lubrication system can effectively reduce the friction of cross roller bearings and extend their service life; Retainers are usually made of plastic or metal materials, which can effectively prevent bearing rollers from colliding with each other; The sealing structure includes two types: plastic pads and oil seals, which can prevent dust from entering; The inner and outer rings are the core components of cross roller bearings, which play a decisive role in their working efficiency; The rolling element is composed of rollers, which can ensure the bearing capacity.

The cross roller bearing industry has high technical barriers and requires dozens of processes in the production process. Cooling is an important process in the production of cross roller bearings, which can be divided into tempering cooling, annealing cooling, normalizing cooling, and quenching cooling. Compared with annealing cooling, normalizing cooling has the advantages of convenient operation, fast cooling speed, and high production efficiency. The cross roller bearings prepared have more advantages in hardness and strength.

Cross roller bearings have a wide range of applications, and the field of humanoid robots is an emerging demand for them. In recent years, with the continuous breakthrough of high-tech, the prosperity of the humanoid robot industry has continued to improve, and it has been widely used in medical, industrial, logistics, electronics and other fields. Cross roller bearings can be used to manufacture rotating joints for humanoid robots, and as downstream demand grows, the industry's development speed continues to accelerate.

Cross roller bearings, as precision transmission components, have broad application prospects. In the future, with the increasing prosperity of the humanoid robot industry, their market demand will further increase. Cross roller bearings, as a special type of rolling bearing, have become a shining star in the field of precision machinery with their unique design concepts and structures. Compared to traditional ball bearings or roller bearings, cross roller bearings have won wide acclaim for their excellent rigidity, precision, and load-bearing capacity.

The core feature of cross roller bearings is that the rollers are arranged in a staggered manner, rather than being arranged along the same plane as traditional bearings. This design enables the bearing to achieve high rigidity in a very small space, greatly improving its load-bearing capacity and rotational accuracy. The inner and outer rings are usually designed in a segmented manner, making it easy to adjust the gap and maintain high-precision rotational motion even after applying preload.

These parameters will directly determine the subsequent detailed design direction:

Spindle speed: Consider the maximum speed limit of the bearing.

Spindle accuracy: The requirement for rotational accuracy affects the selection and configuration of bearings.

Spindle rigidity: the ability to resist deformation, which affects the stiffness requirements of bearings.

Spindle lifespan: expected service life, guiding lubrication and maintenance strategies.

Spindle heating: Considering heat generation and dissipation, it affects the lubrication method.

Spindle reliability: Long term operational stability is related to design redundancy.

After clarifying the performance parameters, designers need to consider the actual dimensions of the spindle (shaft diameter, length, bearing spacing) and the type of bearings (ball or cylindrical rollers), the number of rows, the driving method (belt, gear, motor built-in, etc.), and the lubrication method (grease, oil and gas, oil mist, spray, etc.), which will determine the final structural form.

Axial load: For applications with high axial forces, thrust bearings or thrust angular contact ball bearings are ideal choices. Among them, thrust self-aligning roller bearings and unidirectional thrust angular contact ball bearings can simultaneously withstand axial and radial loads, while other thrust bearings are limited to bearing axial forces.

Radial load: Radial bearings such as crossed roller bearings are mainly responsible for absorbing radial forces. These bearings have a smaller nominal contact angle and are designed specifically for radial loads.

The introduction of cross roller bearings has greatly expanded the possibilities of precision mechanical design. Whether it is high-end CNC machine tools, robot joints, or aerospace instruments, their high rigidity and high precision characteristics are indispensable. Choosing cross roller bearings means choosing higher standards of performance and broader innovation space. In the future development of precision machinery, cross roller bearings will continue to play a core role and lead the industry's technological innovation trend.