導軌絲杠：人形機器人直線運動核心，一步穩不穩全看它

　　Guide screw: the linear motion core of humanoid robots, whether it is stable in one step depends entirely on it

　　在人形機器人研發與落地的浪潮中，運動精度、負載能力與步態穩定性成為核心競爭指標，而很多人忽略了，支撐機器人完成邁步、蹬地、屈伸等動作的關鍵，并非只有電機與控制系統，導軌絲杠作為將旋轉運動轉化為直線推力的核心傳動部件，直接決定機器人運動的精準度、穩定性與承重能力，是隱藏在機身內部的 “運動骨架”。行業內有一個共識：機器人步態不穩、推力不足、壽命偏低，80% 的問題都出在傳動部件上，選對導軌絲杠，才能真正實現人形機器人從 “能走” 到 “走穩、走強” 的跨越。

　　In the wave of research and landing of humanoid robots, motion accuracy, load capacity, and gait stability have become the core competitive indicators. However, many people have overlooked that the key to supporting robots to complete actions such as stepping, pedaling, bending, and extending is not only the motor and control system. The guide wire rod, as the core transmission component that converts rotational motion into linear thrust, directly determines the precision, stability, and load-bearing capacity of robot motion, and is the "motion skeleton" hidden inside the body. There is a consensus in the industry that 80% of the problems with unstable gait, insufficient thrust, and low lifespan of robots lie in transmission components. Only by selecting the right guide screw can humanoid robots truly achieve a leap from "walking" to "stable and strong".

　　人形機器人的關節多為旋轉結構，而腿部、小臂等部位需要精準的直線往復運動，這一轉換必須依靠導軌絲杠完成。電機輸出旋轉動力后，通過絲杠結構轉化為直線驅動力，搭配導軌的導向與支撐作用，既能保證運動方向精準，又能承受機身重量與運動沖擊，形成 “傳動 + 導向” 一體化的穩定結構。可以說，沒有高性能導軌絲杠的支撐，再的控制系統也難以實現流暢、穩健的直線運動，機器人易出現步態晃動、推力不足、運動卡頓等問題。

　　The joints of humanoid robots are mostly rotating structures, while the legs, arms, and other parts require precise linear reciprocating motion, which must be completed by guide screws. After the motor outputs rotational power, it is converted into linear driving force through the screw structure, and combined with the guidance and support of the guide rail, it can ensure precise movement direction and withstand the weight and impact of the body, forming a stable structure that integrates "transmission+guidance". It can be said that without the support of high-performance guide screw, even the most advanced control system is difficult to achieve smooth and stable linear motion, and robots are prone to problems such as gait shaking, insufficient thrust, and motion lag.

　　當前人形機器人領域的絲杠主要分為行星滾柱絲杠、滾珠絲杠和梯形絲杠三類，不同類型適配不同負載場景，形成清晰的選型邏輯。行星滾柱絲杠是高負載場景的，其螺桿環繞多顆滾柱，通過螺紋嚙合傳動，具備承載能力、高剛性與長壽命，能將電機動力轉化為大推力，支撐機器人軀干重量，完成蹬地、跨步等高強度動作，是腿部等核心直線關節的標配，也是目前高端人形機器人的核心傳動方案。

　　The screws in the current field of humanoid robots are mainly divided into three categories: planetary roller screws, ball screws, and trapezoidal screws. Different types are adapted to different load scenarios, forming a clear selection logic. The planetary roller screw is the preferred choice for high load scenarios. Its screw surrounds multiple rollers and is transmitted through threaded engagement, possessing super strong load-bearing capacity, high rigidity, and long lifespan. It can efficiently convert motor power into large thrust, perfectly supporting the weight of the robot's torso and completing high-intensity movements such as kicking and stepping. It is a standard configuration for core linear joints such as legs and is currently the core transmission solution for high-end humanoid robots.

　　滾珠絲杠則是兼顧性能與成本的優選方案，依靠滾珠滾動實現傳動，技術成熟、定位精度高、成本更低，傳動效率可達 90%-96%，雖承載與剛性略遜于行星滾柱絲杠，但完全能滿足小臂、小腿等負載較小的部位需求，是規模化量產場景下競爭力的替代方案，有效降低整機制造成本。而梯形絲杠依靠滑動摩擦傳動，效率低、易磨損，僅具備自鎖特性，在人形機器人中應用場景極少，無法適配高頻次、高精度的運動需求。

　　Ball screw is the preferred solution that balances performance and cost. It relies on ball rolling to achieve transmission, with mature technology, high positioning accuracy, and lower cost. The transmission efficiency can reach 90% -96%. Although its load-bearing and rigidity are slightly inferior to planetary roller screw, it can fully meet the needs of parts with smaller loads such as small arms and calves. It is a highly competitive alternative solution in large-scale production scenarios, effectively reducing the manufacturing cost of the whole machine. However, trapezoidal screw relies on sliding friction transmission, which is inefficient, prone to wear, and only has self-locking characteristics. It has very few application scenarios in humanoid robots and cannot adapt to high-frequency and high-precision motion requirements.

　　導軌絲杠的性能差異，直接體現在人形機器人的實際表現上。高性能導軌絲杠能實現微米級定位精度，保證機器人每一步的步幅精準統一；高剛性結構可抵御運動沖擊，避免機身晃動；長壽命設計則降低后期維護成本，提升整機使用周期。對于量產型人形機器人而言，導軌絲杠的選型更是平衡性能與成本的關鍵，核心關節選用行星滾柱絲杠保障性能，次要部位搭配滾珠絲杠控制成本，形成合理的傳動配置方案。

　　The performance differences of guide screws are directly reflected in the actual performance of humanoid robots. High performance guide screw can achieve micrometer level positioning accuracy, ensuring precise and uniform stride of each step of the robot; High rigidity structure can resist motion impact and avoid body shaking; Long life design reduces maintenance costs and improves the overall lifespan of the machine. For mass-produced humanoid robots, the selection of guide screws is the key to balancing performance and cost. The core joint uses planetary roller screws to ensure performance, and the secondary parts are matched with ball screws to control costs, forming a reasonable transmission configuration plan.

　　從精密工業設備到人形機器人，導軌絲杠始終是直線運動的核心支撐。在人形機器人產業化加速的當下，導軌絲杠不再是普通傳動配件，而是決定整機運動性能的核心部件。精準的直線推力、穩定的傳動效率、可靠的負載支撐，讓機器人實現穩健邁步與靈活動作，這枚小小的 “傳動核心”，正是人形機器人走向實用化、規模化的關鍵密碼，也成為行業技術競爭的重要賽道。

　　From precision industrial equipment to humanoid robots, guide screws have always been the core support for linear motion. In the current acceleration of the industrialization of humanoid robots, guide screws are no longer ordinary transmission components, but the core components that determine the overall motion performance of the machine. Accurate linear thrust, stable transmission efficiency, and reliable load support enable robots to achieve stable stepping and flexible movements. This small "transmission core" is the key password for humanoid robots to move towards practicality and scale, and has also become an important track for industry technology competition.

　　本文由 導軌絲杠  友情奉獻.更多有關的知識請點擊  http://www.2b4g.com/ 真誠的態度.為您提供為的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

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