According to the Zhitong Finance APP, Guotai Junan released a research report stating that the dexterous hand is the soul and core of humanoid robots (cost reduction), and the acceleration of humanoid robot industrialization will drive rapid technological progress in the dexterous hand industry. Currently, the main products in the dexterous hand industry are still dominated by foreign brands. Benefiting from the development of humanoid robots, domestic companies are following suit and launching their own related dexterous hand products, with technology rapidly converging overseas. Companies with dexterous hand production capabilities and products, as well as core component manufacturers of dexterous hands, are recommended, with a focus on ZHAOWEI (003021.SZ), MOONS’ (603728.SH), and Jiecang Linear Motion Technology (603583.SH). The beneficiaries include Dingzhi Technology (873593.BJ).

Guotai Junan's main viewpoints are as follows:

The dexterous hand is the soul of humanoid robots, and cost reduction is the core

The dexterous hand, as a robot with a physiological structure similar to that of a human hand, is a high-level end-effector that can achieve intelligent control. There are various types of dexterous hands, which can be classified according to their transmission methods and driving structures into tendon-driven, link-driven, gear-driven, hydraulic-driven, and hybrid-driven, with tendon-driven solutions being the mainstream in the industry. After Tesla released its prototype, the dexterous hand solution it showcased has undergone multiple iterations. In the path of cost reduction as the core, the overall reconstruction of the drive system has been made, and the dexterous hand showcased in October 2024 appears more streamlined and flexible. The current dexterous hand solution drives the tendon through a planetary roller screw via a motor, while the degree of freedom has been increased to 22, and the driving device has been moved to the forearm.

Hollow cup motors are the preferred driving solution for dexterous hands, and the choice of transmission solutions is diverse

The driving structure mainly refers to the driving source of the dexterous hand module. Currently, most humanoid robots adopt an electric drive mode, so the driving source of the dexterous hand mainly relies on motors. For humanoid robots, hollow cup motors have obvious advantages, and various characteristics meet the needs of humanoid robots. In terms of transmission methods, tendon-driven solutions remain relatively mainstream, and each manufacturer’s transmission solutions vary, all exhibiting certain innovations. In the first, second, and third stages of transmission, Tesla has chosen an innovative solution of motor + micro screw + tendon.

Dexterous hand tactile solutions: Perception technology is the "functional extension" for the commercialization of robots

The sensors of the dexterous hand mainly include two categories: internal sensors and external sensors. Internal sensors mainly provide feedback on the posture information of the dexterous hand, determining its stability. External sensors include proximity sensors and tactile sensors, which mainly perceive information such as the position and force exerted on target objects, with tactile sensors being key to the dexterous hand's ability to perform various functions.

The core task of tactile sensors is to simulate the sensory capabilities of human skin, and their technical route revolves around "sensitivity" and "multifunctionality." Therefore, in terms of material selection, tactile sensors prefer flexible materials with properties such as softness, low modulus, and ease of deformation. Among them, resistive sensors have a simple structure and low cost, making them relatively common tactile sensors. In the long term, electronic skin is seen as the ultimate form of tactile sensing and is regarded as an emerging development direction for future electronic technology Risk Warning

Risks of uncertainty in the industrialization process of humanoid robots and risks of technology research and development not meeting expectations