Guangming Group will talk about T-shaped double gears today

T-shaped double gear is a type of double gear structure with an axial cross-section in the shape of a T and formed as a whole. Two gears are coaxial, with the same core and different diameters (or tooth shapes), commonly used for compact deceleration/reversing/shifting, and are very common in semi-automatic capping machines.

1、 Structure and Definition

Shape: Overall resembling a "T" - head (large gear)+rod (small gear), with the same shaft hole in the center.

Integrated molding: Large and small gears are forged/precision machined from the same blank, with no key connections, no looseness, and high coaxiality.

Different parameters: The number of teeth, module, and pressure angle of the two gears can be different to achieve a fixed transmission ratio (such as i=2~5).

Material: Commonly used 20CrMnTi, 40Cr, 42CrMo, carburizing and quenching, tooth surface hardness HRC58-62.

2、 Core role (screw cap machine scenario)

Deceleration and torque increase: motor high-speed small torque → T-shaped double coupling → low-speed large torque, matching the screw cap 0.5-5N · m requirement.

Compact structure: One shaft completes two-stage transmission, reducing length by more than 30%, suitable for the narrow space of desktop computers.

Torque stability: The integrated structure has no gaps, is impact resistant, and the tightness of the screw cap is consistent, reducing cracking/leakage of the cap.

Steering adaptation: Can be paired with umbrella teeth/bevel teeth, 90 ° reversing, convenient for horizontal arrangement of the motor.

3、 Key parameters (commonly used for capping machines)

Modulus m: 1.5-2.5 (small gear), 2-3 (large gear)

Number of teeth z: Small wheel 12-20, large wheel 30-60, transmission ratio i=2-4

Accuracy level: GB/T 10095.1-2 6-7 levels (low noise, smooth)

Shaft hole diameter: Φ 8- Φ 16mm (suitable for motor/capping head shaft)

Outer diameter: large wheel with a diameter of 50 to 100mm, small wheel with a diameter of 20 to 40mm

4、 Difference from ordinary double gears

T-shaped double gear: Axial T-shaped, integrally forged, two gears one thick and one thin, high coaxiality, suitable for small spaces and high torque.

Ordinary dual gears: two gears of equal diameter or close proximity, key connection/welding, axial length, commonly used for multi gear transmission.

5、 At the position of the semi-automatic capping machine

Installation position: between the motor output shaft and the rotary head, the first stage deceleration core.

Transmission chain: motor → T-shaped double gear → synchronous belt/coupling → capping head (rubber wheel/magnetic head).

Common models: Suitable for desktop capping machines such as XH-T and BT-200, with a torque of 0.5-3N · m.

6、 Key selection points

Transmission ratio: Motor speed ÷ Cap rotation speed=2-4 (commonly i=3).

Torque: The load capacity of the large gear is ≥ 5N · m, with a 20% margin to prevent impact.

Accuracy: Level 7 or above, reducing noise (≤ 65dB) and vibration.

Material: Food grade 304/316 stainless steel is selected, and 20CrMnTi is commonly used.

Installation dimensions: shaft hole, outer diameter, thickness matched with the machine base.

7、 Common faults and maintenance

Wear and tear/broken teeth: overload, poor lubrication → Replace gears and add lubricating grease regularly (once a month).

Loosening: worn keyway → replace key or integral gear, avoid knocking during installation.

High noise: low precision, poor meshing → Choose level 6 precision and ensure coaxiality during installation.

8、 Summary

The T-shaped double gear is a key reduction component of the semi-automatic capping machine, suitable for small batch capping scenarios with compactness, high rigidity, and stable torque. The selection focuses on transmission ratio, torque, accuracy, and material. Daily lubrication and overload prevention should be done well, and the service life can reach 1-2 years.

Powder metallurgy, metal injection molding, powder metallurgy gears

Guangming Group focuses on the research and development of metal forming technology and wear-resistant materials. Its main products include metal compression molding and injection molding powder metallurgy products.

The company has a team of high-quality talents, with the founding team originating from the Guangzhou Nonferrous Metals Research Institute, a directly affiliated national and ministerial level scientific research institution. It has rich industry experience and research and development capabilities, providing a continuous source of innovation power for the company's development. The company has successively obtained 5 invention patents and more than 30 utility model patents. It has passed the IATF16949 quality management system, ISO9001-2015 quality management system, ISO14001 environmental management system, intellectual property management system, and obtained international trademark certification. It is an innovative enterprise in Guangdong Province, a small giant enterprise in science and technology in Guangzhou, a member of the Guangdong Powder Metallurgy Industry Technology Innovation Alliance, and an initiator of the Guangzhou Advanced Powder Metallurgy Cluster Promotion Center.