Product Description
High precision
Standard backlash is 3 arc-min, ideal for precisioncontrol.
High rigidity & torque
High rigidity & high torque were achived by uncagedneedle roller bearings.
High load capacity
Adopting taper roller bearing for the main output shaftto increase radial and axial load.ЖFrame size 064·090 adopt ball bearing.
Adapter-bushing connection
Can be attached to any motor all over the world.
No grease leakagePerfect solution using high viscosity anti-separationgrease.
Maintenance-free
No need to replace the grease for the life of the unit.
Can be attached in any position.
Application areas: Industrial automation, supporting mobile robots, SCARA robots, parallel manipulators, printing machinery, laser cutting machines, packaging machinery, pharmaceutical machinery, pipe bending machines, spring machines, non-standard automation equipment and other industries
Planetary Gears – a masterclass for mechanical engineers
- Planetary gear sets contain a central sun gear, surrounded by several planet gears, held by a planet carrier, and enclosed within a ring gear
- The sun gear, ring gear, and planetary carrier form 3 possible input/outputs from a planetary gear set
- Typically, 1 portion of a planetary set is held stationary, yielding a single input and a single output, with the overall gear ratio depending on which part is held stationary, which is the input, and which the output
- Instead of holding any part stationary, 2 parts can be used as inputs, with the single output being a function of the 2 inputs
- This can be accomplished in a two-stage gearbox, with the first stage driving 2 portions of the second stage. A very high gear ratio can be realized in a compact package. This kind of arrangement is sometimes called a ‘differential planetary’ set
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| Application: | Electric Cars, Motorcycle, Machinery, Marine, Agricultural Machinery, Car |
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| Hardness: | Hardened Tooth Surface |
| Installation: | Vertical Type |
| Layout: | Coaxial |
| Gear Shape: | Conical – Cylindrical Gear |
| Step: | Stepless |
| Samples: |
US$ 249/Piece
1 Piece(Min.Order) | |
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| Customization: |
Available
| Customized Request |
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How do epicyclic gears contribute to gear reduction and speed increase?
Epicyclic gears, also known as planetary gears, play a significant role in achieving gear reduction and speed increase in various mechanical systems. Here’s a detailed explanation:
1. Gear Reduction:
Epicyclic gears can achieve gear reduction by utilizing their unique gear arrangement. The gear reduction is achieved by fixing or holding certain components of the gear system, such as the ring gear or the planet carrier, while the input and output shafts rotate. This causes the sun gear to drive the planet gears, resulting in a reduction of output speed and an increase in torque. The gear ratio formula for gear reduction in an epicyclic gear system is R = (1 + S) / (1 + R), where R is the number of teeth on the ring gear and S is the number of teeth on the sun gear.
2. Speed Increase:
Epicyclic gears can also be used to achieve speed increase when certain components of the gear system are held fixed or driven while the output shaft rotates. In this configuration, the input torque is divided among multiple planet gears, which rotate around the sun gear and drive the output shaft. This results in an increase in output speed and a decrease in torque. The gear ratio formula for speed increase in an epicyclic gear system is R = (1 + R) / (1 + S), where R is the number of teeth on the ring gear and S is the number of teeth on the sun gear.
3. Multiple Stages:
Epicyclic gears can achieve higher gear reduction or speed increase by incorporating multiple stages within a single gear system. Each stage consists of a set of gears, including a sun gear, planet gears, and a ring gear. The output of one stage becomes the input for the next stage, allowing for a cumulative effect on the gear ratio. By stacking multiple stages, the overall gear reduction or speed increase can be multiplied, providing a wide range of gear ratios to suit different application requirements.
4. Customizable Gear Ratios:
Epicyclic gears offer flexibility in achieving customizable gear ratios. By varying the number of teeth on the gears or using different combinations of gears, specific gear ratios can be obtained to meet the needs of the application. This customization capability allows for optimized speed control, gear reduction, and torque multiplication, making epicyclic gears versatile in a wide range of mechanical systems.
5. Compact Design:
Epicyclic gears contribute to gear reduction and speed increase while maintaining a compact design. The concentric arrangement of gears and the ability to achieve multiple gear stages within a single gear system result in a smaller overall footprint compared to other gear arrangements. This compact design is particularly useful in space-constrained applications where achieving high gear reduction or speed increase is essential.
In summary, epicyclic gears contribute to gear reduction and speed increase through their unique gear arrangement, multiple stages, customizable gear ratios, and compact design. These features make them widely used in various mechanical systems, such as automotive transmissions, industrial machinery, and robotics, where efficient power transmission and speed control are crucial.
How do epicyclic gears contribute to reducing gear wear and noise?
Epicyclic gears, also known as planetary gears, offer several advantages that contribute to reducing gear wear and noise. Here’s a detailed explanation:
1. Load Distribution:
The arrangement of multiple planet gears in an epicyclic gear system helps distribute the load evenly across the gear teeth. This load distribution minimizes stress concentration on individual gear teeth, reducing the risk of wear and fatigue failure. By sharing the load, epicyclic gears can handle higher torque levels while reducing the wear on specific gear teeth.
2. Increased Tooth Contact Ratio:
Epicyclic gears typically have a higher tooth contact ratio compared to other gear types, such as spur or helical gears. The tooth contact ratio refers to the number of teeth in contact at any given time. A higher tooth contact ratio results in a smoother distribution of load and reduces localized contact stresses. This helps to minimize wear and noise generation during gear operation.
3. Balanced Loading:
The design of epicyclic gears allows for balanced loading of the gear teeth. The load is distributed among multiple planet gears, and each gear tooth engages with multiple teeth on both the sun gear and the ring gear simultaneously. This balanced loading helps to minimize tooth deflection and backlash, reducing wear and noise generation.
4. Lubrication:
Epicyclic gears benefit from effective lubrication due to their design. The gear teeth are constantly immersed in the lubricant, which helps reduce friction and wear. Proper lubrication also helps to dampen vibrations and reduce noise generated during gear operation.
5. Controlled Speed and Load Transitions:
Epicyclic gears can provide smooth speed and load transitions due to their ability to change gear ratios. When transitioning from one gear ratio to another, the gear engagement can be carefully controlled to minimize sudden shocks or impacts, which can contribute to wear and noise. The controlled speed and load transitions in epicyclic gears help reduce gear wear and noise levels.
6. Precision Manufacturing:
Epicyclic gears are often manufactured with high precision to ensure accurate gear meshing and minimize manufacturing errors. Precise gear manufacturing helps to maintain proper alignment and minimize tooth misalignment, which can lead to increased wear and noise.
In summary, the load distribution, increased tooth contact ratio, balanced loading, lubrication, controlled speed and load transitions, and precision manufacturing of epicyclic gears all contribute to reducing gear wear and noise. These factors make epicyclic gears a favorable choice in applications where minimizing wear and noise levels is important.
What is the role of a sun gear, planet gears, and ring gear in an epicyclic arrangement?
In an epicyclic gear arrangement, the sun gear, planet gears, and ring gear each have specific roles and functions. Here’s a detailed explanation:
1. Sun Gear:
The sun gear is the central gear component in an epicyclic arrangement. Its primary role is to provide the input rotational motion or power to the gear system. The sun gear is typically located at the center and is surrounded by the planet gears. It engages with the planet gears through meshing teeth, transmitting rotational force to them.
2. Planet Gears:
The planet gears are multiple gears that revolve around the sun gear in an epicyclic arrangement. They are mounted on a carrier, which holds and supports the planet gears. The planet gears mesh with both the sun gear and the ring gear. As the sun gear rotates, it causes the planet gears to rotate around their own axes while simultaneously orbiting around the sun gear. The planet gears transmit the rotational motion and torque from the sun gear to the ring gear.
3. Ring Gear:
The ring gear, also known as the annular gear or the outer gear, is the outermost gear component in an epicyclic arrangement. It has internal teeth that mesh with the planet gears. The ring gear provides the outer boundary of the gear system and engages with the planet gears, transferring the rotational motion and torque from the planet gears to the output or the next stage of the gear system. In some arrangements, the ring gear is fixed or held stationary, while in others, it can rotate.
The combination and interaction of the sun gear, planet gears, and ring gear in an epicyclic arrangement enable various gear functions, such as gear reduction, torque multiplication, speed control, and directional changes. The arrangement and engagement of these gears determine the gear ratios and overall performance of the gear system.
editor by CX 2024-03-26