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”.
Products | Skew Axes Helical Gear Set For Auto Thread-Trimming Lockstitch |
|---|
| Teeth profile | Gleason |
|---|
| Type | Skew axes helical gear set |
|---|
| Axes | Skew axes |
|---|
| Layout | 90° non-parallel shaft layout |
|---|
| Drawing Number | WPC21/C22/C23/C24 |
|---|
| Number of Teeth (Z) | Z=28/14/28/14 |
|---|
| Application | Auto thread-trimming lockstitch sewing machine |
|---|
| Service | Customized |
|---|
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!
