Hollow Output Shaft Gearbox

Hollow Output Shaft Gearbox is a specially designed gear transmission device, characterized by a through hollow structure of the output shaft (rather than a traditional solid shaft), which can achieve power transmission and speed/torque conversion, as well as meet the needs of threading, threading, avoiding workpieces or integrating other functions through the central hollow channel. It is widely used in automation, machine tools, robots, logistics and other fields.

Hollow Output Shaft Gearbox is a transmission device that combines a reduction mechanism with a hollow shaft design. Its output shaft center has a through-hole that allows cables, pipelines, or mechanical components to pass through, while providing high torque and precision reduction function. Hollow Output Shaft Gearbox is widely used in the fields of robots, automation equipment, machine tools, etc., to solve the problem of difficult wiring of traditional reducers.

The design of the Hollow Output Shaft Gearbox revolves around the dual requirements of "power transmission" and "hollow function", with typical structures including:

1. Basic gear transmission system

Internally integrated gear sets (such as cylindrical gears, helical gears, bevel gears, planetary gears, or hypoid gears, etc.) receive rotational motion from motors or other power sources through the input shaft. After gear meshing for deceleration (or acceleration), the power is transmitted to the output shaft to achieve torque amplification (during deceleration) or speed increase (during acceleration).

The transmission ratio is a core parameter (such as 5:1, 20:1, 100:1) that directly determines the output torque (torque=input torque x transmission ratio x efficiency) and output speed (speed=input speed ÷ transmission ratio).

2. Hollow Output Shaft

The output shaft center is machined with a through axial through-hole (diameter varies from a few millimeters to several hundred millimeters depending on the model), forming a "hollow channel". This channel runs through the output end of the gearbox, and some models even extend to the input end or side, ensuring that pipelines, cables, etc. can pass through the entire process.

The material of hollow shafts is usually high-strength alloy steel, which ensures the rigidity and rotation accuracy of the shaft through precision machining. The shaft end is often designed with keyways, splines, threads or flanges for connecting loads (such as rotating tables, conveyors, robotic arm joints, etc.).

3. Supporting and sealing structure

The hollow output shaft is supported within the gearbox housing by high-precision bearings such as deep groove ball bearings and tapered roller bearings, ensuring smooth rotation and radial/axial load-bearing capacity.

There are sealing components (such as oil seals, O-rings) between the shaft and the housing to prevent lubricating oil leakage or external dust and water vapor from entering, suitable for use in industrial environments.

Hollow Output Shaft Gearbox solves the problem of messy wiring in traditional transmission systems by combining a hollow shaft and a reduction mechanism, while providing high torque and precision control capabilities. When selecting, it is necessary to choose planetary, harmonic, or hypoid gear types based on load, accuracy, and through-hole requirements, and match the motor and communication protocol.

Here In this page, we introduce series of Hollow Output Shaft Gearbox,you can see data sheet, production pictures,vedios of test as follows:

Also You are welcome to watch more projects or visit our video gallery by Youtube: https://www.youtube.com/@tallmanrobotics

Packing and delivery of Motorized Rotary Tables:

Production of Hollow Rotary Tables:

Compared to traditional solid output shaft gearboxes, the unique value of Hollow Output Shaft Gearbox lies in:

1.Space utilization and layout flexibility:

Hollow channels allow cables, air pipes, hydraulic pipes, optical fibers, or workpiece shafts to pass through, avoiding external entanglement or interference of pipelines. They are particularly suitable for the "dynamic wiring" requirements in rotating equipment such as rotating workbenches and robot joints, reducing pipeline wear and failure risks.

2.Multi functional integration capability:

In addition to power transmission, hollow shafts can be used to locate workpieces (such as fixing slender workpieces through the center of the shaft), install sensors (such as installing laser rangefinders through hollow holes), or serve as material conveying channels (such as continuous processing of small parts by passing through the shaft).

3.Compatible with high load and precision requirements:

Hollow design does not significantly sacrifice structural strength, coupled with high-quality gears and bearings, it can achieve high torque output (some models can reach tens of thousands of N · m) and high-precision rotation (such as positioning error ≤ 0.1 °), balancing heavy load and precision control scenarios.

4.Simplify system design:

No need to design additional pipeline avoidance structures or external drag chains, reducing the overall size and assembly complexity of the equipment and lowering system costs.

Hollow Output Shaft Gearbox is commonly used in the following scenarios due to its dual function of "transmission power+threading/threading":

Automated rotating equipment: such as rotating workbenches and indexing plates, which can achieve 360 ° rotation of workpieces for processing/inspection through hollow shafts and control cables or pneumatic pipelines.

Robot joint: The waist and shoulder rotation joints of collaborative robots or industrial robots, with hollow shafts used to integrate internal cables and reduce external pipeline entanglement.

Logistics and conveying systems: such as sorting machine rotating units, turntable conveyors, and hollow shafts that can be threaded with sensor cables or used as material guidance channels.

Machine tools and precision manufacturing: The fourth axis of CNC machine tools and the rotating axis of engraving machines fix slender workpieces (such as shaft parts) through hollow shafts to achieve multi-faceted machining.

Medical equipment: such as CT rotary tables, surgical robots, hollow shafts are used to thread medical cables or accommodate patient support structures, ensuring equipment compactness.

Hollow Output Shaft Gearbox is a "multifunctional player" in industrial transmission. Through innovative design of hollow output shafts, it solves practical problems such as pipeline interference and space limitations while ensuring power transmission efficiency and load capacity. When selecting, it is necessary to focus on matching the hollow aperture, transmission ratio, load capacity, and accuracy requirements, so as to form an efficient and coordinated transmission system with the power source and load equipment.