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Automation equipment and robots perform repetitive motions on production floors for long hours, constantly exposed to load and impact. In this kind of environment, maintaining consistent driving performance is an essential condition for stable equipment operation. Reducers, which use a motor’s rotational speed to generate the torque needed, are a core component of the drive system and are required to have high durability.
A reducer’s performance is shaped by a range of factors, including reduction ratio, rigidity, assembly structure, and materials. Among these, the tooth profile, or the shape of the gear, is a critical design element that directly affects how power is transmitted and how load is distributed.
Even under identical driving conditions, performance can vary significantly depending on which tooth profile is applied, which is why selecting the right tooth profile is such an important consideration in reducer design. Among the various tooth profiles available, the cycloid gear profile has drawn attention for combining a high reduction ratio with effective load distribution characteristics. Thanks to these features, it is used across a wide range of fields that require repetitive driving, including industrial robots, automation equipment, and logistics robots, and it continues to be widely used in drive component design where stability is essential.
In this post, we will look at the structural characteristics of the cycloid gear profile and how these characteristics support a reducer’s durability and accurate operation.
Why The Cycloid Gear Profile Is Advantageous For Reducer Design
Key Summary — The cycloid gear profile achieves a high reduction ratio within a compact power transmission structure, and its curved teeth mesh in a rolling motion that spreads force across a wider contact area.
When a high reduction ratio is needed, one common approach is to transmit power by combining gears across multiple stages. As the number of gear stages increases, the power transmission path becomes longer and the number of contact points between gears also increases, which can raise internal friction and affect wear over extended use.
Reducers that apply a cycloid gear profile are built with a structure that efficiently achieves a high reduction ratio. The power transmission structure is compact, and power is transferred efficiently between components. This characteristic helps maintain consistent driving performance in industrial settings where automation equipment and robots run continuously.
Another notable feature of the cycloid gear profile lies in how it distributes load. Load can concentrate at the contact points where tooth profiles mesh, and in that situation sudden impacts or sustained high loads can affect the tooth profile during meshing.
The cycloid gear profile is curved, allowing the gears to mesh in a rolling motion that distributes load more evenly. Because force is spread across a wider contact area, load concentration at any single point is reduced, allowing for stable power transmission even under repeated loading. This characteristic reduces wear on the tooth profile and contributes to a longer service life for the reducer.
The tooth profile structure also plays an important role in how accurately a robot performs its movements. A gear structure that meshes along a curve reduces backlash and minimizes positional error during repetitive motion. In robotic applications where accurate motion matters, such as the joints of humanoid robots or robotic arms that assemble small parts, the backlash characteristics of the reducer can directly affect the quality of the work performed. Because the cycloid gear profile delivers high durability alongside accurate driving performance, it is used across a wide range of robots and automation equipment.
Looking For A Reducer That Is Thin Yet Powerful? The BSR Series
Key Summary — The BSR series applies a proprietary cycloidal structure to deliver strong torque in a thin form factor, and the BSR 070 and 080 lines adopt a pinless structure that simplifies how parts connect with one another.
We independently carries out the entire process from reducer design to production and has continuously conducted research and development on cycloid technology. Building on this foundation, we developed the BSR reducer series, which applies our proprietary cycloidal structure, offering drive solutions that meet the demands of a wide range of industrial environments.
The BSR series is designed to deliver strong torque even in a thin form factor, making it well suited for automation equipment and robotic systems with limited installation space. A thinner reducer allows for a smaller drive unit, which in turn helps keep the overall equipment size compact, giving designers both flexibility and greater operational efficiency.
The series also applies a cycloidal based structure that supports stable power transmission even under repeated loading conditions, allowing consistent driving characteristics to be maintained across a variety of operating environments.
In particular, the BSR 070 and 080 lines adopt a pinless structure, reducing the additional components typically required in pin based designs and simplifying how parts connect with one another. A simpler structure means fewer small gaps or errors can arise during assembly, which also reduces the risk of deformation over repeated operation. This design contributes to strong torque transmission and greater durability, resulting in the kind of reliability that industrial settings demand.
The BSR reducer series combines the load distributing structure of the cycloid gear profile with Bonsystems’ reducer design expertise, offering a solution suited for automation equipment and robotic drive units that require strong torque within limited space. If you are considering a reducer for your application or would like more information about cycloidal based reducers, please visit our website to request a consultation or quote.
F.A.Q
Q: Which industries mainly use the cycloid gear profile?
A: It is used in fields that require repetitive driving, such as industrial robots, automation equipment, and logistics robots. It can also be found in environments where accuracy of movement is critical, such as the joints of humanoid robots or robotic arms. The characteristics of the cycloidal structure are especially effective in drive units that require both stable power transmission and positional accuracy.
Q: Why does the shape of the gear tooth profile matter in reducer design?
A: The tooth profile determines how power is transmitted and how load is distributed inside the reducer. Even under identical driving conditions, driving characteristics can differ depending on which tooth profile is applied, so it is one of the elements worth reviewing from the early design stage.
Q: What are the advantages of a thinner reducer in terms of design?
A: A thinner reducer allows for a smaller overall drive unit, giving equipment designers greater freedom in how they arrange components within the available space. This is especially important for automation equipment or compact robotic systems with limited installation space, where choosing the right reducer from the early design stage matters.
Q: What specifically changes with a pinless structure?
A: Pin based structures involve more connection points, which means more factors to manage during assembly, and any minor gaps or positional errors introduced during this process can lead to instability or deformation over repeated operation. A pinless structure reduces these connection points, simplifying the overall structure and minimizing the factors that can cause errors over long term use.
Q: What are Bonsystems’ strengths in the field of cycloidal reducers?
A: We handle every stage of reducer development, from design through production, in house, and we have continued to invest in research and development around cycloidal technology. The BSR series reflects this technical expertise, featuring our proprietary cycloidal structure and developed from the design stage with real world industrial operating conditions in mind. Consultations and quotes for our reducer solutions can be requested through our website.
