Service robots are moving beyond transporting items toward directly handling objects and interacting with the spaces around them, and that shift places new demands on the actuator inside each joint. This article looks at what next-generation service platforms require from their drive components, and why delivering strong torque within a thin joint structure has become a central design problem. It also introduces the Bonsystems BCSA V4 series, a cycloidal actuator built for robots with limited internal space.
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We encounter many different kinds of services in everyday life. From ordering food at a restaurant to receiving guidance at a hotel to getting information at a public facility, services are woven into nearly every part of daily life.
So what happens when robots start providing these services? In fact, service robots are already part of our daily surroundings. In restaurants, serving robots move between the kitchen and dining area delivering food, while in public facilities, cleaning robots travel through large spaces handling environmental maintenance tasks. In this way, these machines take on repetitive, standardized work and ease the burden on people.
As robotics technology continues to advance, these robots are moving beyond simply transporting items from one place to another and evolving toward directly handling objects and interacting with their surroundings. As a result, next-generation service platforms are being asked to deliver a higher level of driving performance and stable output in order to carry out increasingly complex tasks.
In this article, we will look at how service robots are expected to evolve going forward, and how actuators, the core driving technology behind them, need to change to keep up.
What Actuators Need to Meet for Next-Generation Service Robots
These machines move through a variety of spaces to do their work, rather than staying within one fixed workspace. Since they often need to pass through narrow corridors or navigate around people and structures, they require the ability to move reliably while responding to their surroundings in real time.
Beyond this, human-facing robots are evolving to do more than move and deliver, taking on more complex tasks that involve interacting with their environment. To support this, robotic arm style structures are being incorporated, using joints that move in multiple directions to grip objects and place them exactly where needed.
Robots that operate close to people in particular must be able to adjust their movement and force according to the task at hand. Even small errors or unstable motion while handling objects can affect both the quality of the work and user safety, so maintaining consistent torque output across a range of conditions is essential.
The actuator is the key component that makes this kind of driving performance possible. It delivers the torque needed inside each joint to produce motion suited to the task, making it an important factor in a robot’s overall performance. Generally speaking, larger actuators can accommodate bigger motors and reducers, making it easier to deliver strong torque.
Shrinking the actuator, however, limits the size and structure of the components that can fit inside, making it harder to generate sufficient torque. For this reason, delivering strong torque within a limited space has become a critical design consideration in service robotics, where efficient use of space matters greatly.
The BCSA Series: Compact Size Meets Stable Driving Performance
Bonsystems focused its research on actuators that expand the design possibilities available to robot engineers, with this exact challenge in mind. The result is the BCSA V4 series, which applies proprietary cycloidal technology to deliver strong torque even within a thin, compact structure.
BCSA V4 is an actuator solution that can be flexibly applied to robots with limited space, such as service robots. Its slim structure minimizes the installation footprint of the drive unit and makes better use of the internal space available. This allows for more efficient wiring layouts between components and leaves room to accommodate additional sensors, extra batteries, and other components for expanded functionality.
The core challenge of a thin structure is maintaining the necessary output performance while reducing size. BCSA V4 meets this challenge, delivering consistent torque output even within a narrow joint structure. This makes it worth considering for arm-based service platforms that need to adjust force appropriately depending on the object being handled.
What allows BCSA V4 to deliver strong torque within such a thin structure is the cycloidal technology built into its internal design. A cycloidal tooth profile transmits power through a rolling motion as the mating surfaces mesh together. This structural characteristic makes it possible to obtain a wide reduction ratio with a single gear stage, keeping the drive shaft thin while still delivering strong driving performance.
On top of this, the cycloidal structure distributes the impact and load placed on the drive unit across the entire gear rather than concentrating it in one area. This reduces stress on any single point, slows gear wear, and helps maintain stable performance over the long term, contributing to greater product reliability.
In short, BCSA combines a thin structure with strong torque output through cycloidal technology. It improves space efficiency while also delivering durability, making it a solution worth exploring for a wide range of robot designs.
Public-facing robots are expanding their range of roles and applications as they evolve to perform more complex tasks through arm-like structures. Along with this shift, the importance of actuators that can deliver stable torque even within limited joint space continues to grow.
Rather than simply supplying components, we aim to be a partner that continuously researches and develops the technology next-generation robots need and works alongside developers to solve the challenges they face. If you are having difficulty selecting the right actuator for a service robot, or if you are curious whether the BCSA series could work for equipment you are developing, please reach out to us through our website.
F.A.Q
Q: Why Do Service Robots Need Joint Structures Like a Robotic Arm?
A: Next-generation service robots are evolving beyond simple delivery and movement to perform a wider range of tasks, including picking up and handing over objects and pressing buttons. Carrying out these tasks requires a joint structure that can move in multiple directions, allowing the robot to adjust its position and posture freely, much like a human arm.
Q: Why Does Torque Output Performance Matter So Much for These Robots?
A: Lifting an object or holding a fixed posture requires a drive unit capable of consistently generating sufficient force. If torque is insufficient, the robot may struggle to perform the intended motion reliably, which can lead to positioning errors or reduced stability during operation.
Q: Why Is It Difficult to Deliver Strong Torque While Also Making an Actuator Smaller?
A: As an actuator shrinks, so does the space available for the motor and reducer inside it. Smaller core drive components make it harder to generate enough torque, so achieving both a compact size and strong output performance at the same time requires strong design capabilities in drive structure and reduction technology.
Q: What Advantages Does BCSA Offer for Robot Designs With Limited Space?
A: BCSA’s thin structure reduces the space needed for the drive unit within a robot joint and allows for more efficient use of internal space. The space this frees up can be used for sensors, batteries, and other components, giving engineers greater design freedom.
Q: How Is the Range of Applications for Service Robots Expected to Expand Going Forward?
A: These machines are expected to move beyond performing specific, narrowly defined tasks and evolve to support people across a broader range of environments. While past applications centered on relatively clear-cut tasks like serving, cleaning, and providing guidance, future applications are likely to expand into more complex fields such as healthcare and daily living support, with more direct interaction between robots and people.
In addition, the cycloidal reduction structure used in BCSA supports both a wide reduction ratio and strong torque output even at a thin profile. This makes it possible to secure the torque needed within a limited joint space, making it a strong option for designs where balancing space and performance is critical.
