Skew Axes Helical Gear Set For Auto Thread-Trimming Lockstitch

Skew Axes Helical Gear Set For Auto Thread-Trimming Lockstitch

I. Design Orientation —— “Transmission Hub” of Automatic Thread-Trimming Lockstitch Sewing Machine
This is a helical gear transmission assembly for non-parallel shafts, specially designed for automatic thread-trimming lockstitch sewing machines. It focuses on solving the problems of “compact spatial transmission + precise coordination of thread - trimming actions”:
1.Spatial Adaptability
Adopting a 90° non-parallel shaft layout, it replaces the traditional bevel gear/spur gear set, reducing the volume of the transmission mechanism in the sewing machine head by 35%. It meets the compact design requirement of automatic thread-trimming lockstitch sewing machines for “multi - mechanism integration (sewing, thread-trimming, feeding)” and supports the miniaturization of equipment (such as desktop lockstitch sewing machines).
2.Functional Modularity
The gear pair integrates the functions of power transmission, thread-trimming triggering, and sequence control. Through standardized tooth profile parameters, it is compatible with the transmission systems of mainstream lockstitch sewing machine brands at home and abroad, reducing the R&D and maintenance costs of the equipment.

II. Transmission Logic——Dual-Track Coordination of “Power Chain + Thread-Trimming Chain”
The gear pair constructs the “motor - actuator” transmission network of the lockstitch sewing machine and simultaneously drives two core actions: sewing and thread-trimming:
1.Sewing Power Chain
▶Transmission: The high-speed rotation output by the motor is decelerated and torque-increased by the driving gear, and the power is distributed to the hook mechanism and the feeding mechanism, ensuring the uniform density of sewing stitches.
▶Synchronization Control: Utilizing the high contact ratio of helical gear meshing, the transmission vibration is reduced, making the needle penetration and hook thread-catching accurately synchronized, with a thread-skipping rate ≤ 0.1%.
2.Thread-Trimming Action Chain
▶Trigger Mechanism: When sewing is completed, the electronic control system triggers the thread-trimming electromagnet, the thread-trimming cam linked with the gear pair rotates, and pushes the moving knife assembly to complete the “thread - separating - cutting” action, with a thread-trimming response time ≤0.2s.
▶Precision Guarantee: The self-lubricating property of the driven gear ensures the uniform rotation of the thread-trimming cam, and the shearing gap between the moving knife and the fixed knife is stably maintained at 0.05-0.1mm, realizing the “one-cut-for-both” of the upper thread and the bobbin thread, with a thread-trimming success rate ≥99.5%.

III. Adaptation Scenarios —— “Full - Working - Condition Coverage” of Automatic Thread-Trimming Lockstitch Sewing Machine
The gear pair is customized in terms of materials and parameters to adapt to the diversified application scenarios of lockstitch sewing machines:
1.Fabric Compatibility
▶For light and thin fabrics: Small-module gears (m=1-1.5mm) are adopted to reduce the transmission torque, and the feeding precision of the feeding mechanism is ≤± 0.1mm, avoiding fabric wrinkling.
▶For heavy-duty fabrics: Large-module gears (m=2-3mm) are selected, the tooth surface load-bearing capacity is increased by 40%, and the thread-trimming shearing force reaches 5-10N, ensuring the integrity of thread-trimming for heavy-duty fabrics.
2.Process Adaptability
▶Ordinary Lockstitch Sewing: The transmission ratio of the gear pair i=10-15, and the sewing speed is 2000-3000 stitches per minute, meeting the demand for mass production.
▶Decorative Sewing: Through the design of multi-start worms/helical gears, the stepless adjustment of the transmission ratio is realized, supporting the needle swing amplitude of 2-10mm and adapting to the demand for complex stitch patterns.

This set of helical gear pairs for non-parallel shafts, with its compact spatial transmission design, dual-track action coordination logic, and full-scenario adaptation capability, becomes the “transmission hub” of the automatic thread-trimming lockstitch sewing machine. It not only meets the core demands of the lockstitch sewing machine for “efficient sewing + precise thread-trimming” but also promotes the equipment upgrade of the garment-making industry through the balance of standardization and customization —— Small gears drive high efficiency and support the transformation of the garment industry from “labor-intensive” to “technology-intensive”.

DINGSCO Precision Gear Solutions — Pioneering Force in Equipment Transmission

Core Advantages: Cutting-Edge Equipment × Digitalized Processes × Full-Cycle Services

 
As a leading precision gear manufacturer, DINGSCO specializes in customized production of micro high-precision spiral bevel gears and hypoid gears through our multiple CNC seven-axis five-linkage spiral bevel gear grinding/milling machines and Gleason spiral bevel cutter technology. With DIN 6 precision class (tooth profile error ≤ ±5μm), 95%+ transmission efficiency, and ultra-high reduction ratios, we deliver reliable transmission solutions for robotics, motor drives, new energy vehicles, and more.

Why Choose DINGSCO?
✅ High Precision: Achieving DIN 6 grade accuracy, leading the industry in controlling tooth profile errors.

✅ High Efficiency: With a single - stage reduction ratio of up to 300:1, and a transmission efficiency of over 95%.

✅ Durability: 40% lower lifecycle cost, <0.5% failure rate.
✅ Fast response: The digital process can shorten the delivery cycle to 20 working days.

Contact Us Soon for gear optimization proposals and 3D meshing simulations!