Nitriding Spur Gear with internal spline for gear box-Internal Spur gear

Nitriding Spur Gear with internal spline for gear box-Internal Spur gear

1) Description of  Internal Spur Gear With Internal Spline

An Internal Spur Gear With Internal Spline is a specialized mechanical component that combines two key features:

an internal spur gear and an internal spline, integrated into a single cylindrical structure. This design is engineered to

transmit torque, accommodate axial movement, and optimize space utilization in compact industrial systems.

2) Structural Features of Internal Spur Gear With Internal Spline
a) Internal Spur Gear:
The outer section of the component features a set of spur teeth machined on the inner surface of a cylindrical ring.

These teeth are parallel to the axis and mesh with an external spur gear placed inside the ring. The tooth profile follows

standard involute geometry, ensuring smooth meshing and efficient power transmission.
b) Internal Spline:
The inner section of the component is equipped with an internal spline—a series of evenly spaced, parallel ridges along

the inner circumference. These splines engage with a mating external spline, allowing torque transfer while permitting

limited axial movement or alignment adjustment between connected parts.
c) Integration:
Both features share the same central axis, with the spline located radially inward of the internal gear teeth. The component’s

thickness is designed to accommodate both the gear teeth and spline engagement, ensuring structural integrity under load.

3) Key Functions of Internal Spur Gear With Internal Spline
a) Torque Transmission:
The internal spur gear meshes with an external pinion to transmit rotational motion between parallel axes,

while the internal spline connects to a shaft or hub, transferring torque between the gear and the shaft.
b) Space Efficiency:
By combining two functions into one component, it eliminates the need for separate gear and spline assemblies,

reducing axial length and weight—critical for compact systems like gearboxes or automotive transmissions.
c) Axial Compatibility:
The internal spline allows axial movement between the component and its mating shaft, accommodating thermal expansion,

misalignment, or intentional axial adjustments without disrupting torque transfer.
d) High Load Capacity:
Both the gear teeth (distributing radial loads) and splines (handling axial and torsional loads) are designed to withstand heavy loads,

making the component suitable for high-torque applications.

4) Applications of Internal Spur Gear With Internal Spline

a) Automotive Transmissions: To connect planetary gear sets and shafts, enabling gear ratio changes.

b) Robotics: In joint actuators, where space constraints demand integrated torque transfer and shaft alignment.

c) Aerospace Systems: For lightweight, high-reliability power transmission in engine accessories or landing gear mechanisms.

d) Heavy Machinery: In gearboxes for construction equipment or mining machinery, handling high torque and axial loads.