Structural composition: The planetary gear frame is a key component of the planetary gear mechanism, connecting the axes of multiple planetary wheels. It is usually composed of the bracket body, shaft hole, planetary shaft mounting position, etc. Some also include structures used to connect other parts, such as fixing rings, inserts, sockets, etc.
• Working principle: In the electric tool, the motor output shaft drives the solar wheel to rotate, and the solar wheel meshes with the planetary wheel, so that the planetary wheel not only rotates around its own axis, but also revolves around the solar wheel by meshing with the fixed inner gear ring. The rotational motion of the planetary wheel is transmitted through the planetary frame, converting the high-speed and low-torque input power into low The output power of high-speed torque realizes the function of deceleration and torque increase.
Functions and advantages:
• Function: First, to support the planetary wheel to ensure that it maintains the correct position and movement trajectory when orbiting and rotating around the solar wheel; second, as a power output component, it transforms the rotational motion of the planetary wheel into the rotational movement of the output shaft to provide the required rotational speed and torque for the working head of the electric tool.
•Advantages: The planetary gear reduction mechanism using the planetary gear frame has the advantages of small size, light weight, high transmission efficiency, large bearing capacity, large transmission ratio range, etc. compared with other deceleration methods, which can enable power tools to achieve efficient power transmission and speed adjustment in a compact space.
Materials and manufacturing
•Materials: Generally, high-strength and wear-resistant metal materials are selected, such as high-quality carbon steel, alloy steel, etc. There are also planetary gear frames made of powder metallurgy materials, which have the advantages of low cost, high precision and mass production.
• Manufacturing technology: including cutting, forging, casting, powder metallurgy molding, etc. Cutting can ensure high precision but low efficiency; forging and casting are suitable for manufacturing complex planetary gear frames; powder metallurgy molding is suitable for large-scale production of gear frames with complex shapes and high accuracy requirements.
Application field
•Electric screwdriver: It can convert the high-speed rotation of the motor into appropriate speed and large torque, so that the screwdriver can easily tighten or loosen the screws.
•Electric drill: Through the deceleration and torque increase of the planetary gear frame, the drill bit obtains sufficient torque to drill, improving the drilling efficiency and quality.
•Electric wrench: It can generate a large torque and is used to tighten or loosen various bolts and nuts. It is widely used in automobile maintenance, machinery manufacturing and other fields.
