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Mechanical engineering blog | Rotary Dampers | Ball Bearings | One-Way Clutches | Torque Limiters

Regarding TOK product ratio, custom products account for more than 70% of all products.
And TOK has an abundance of experiences for various markets, for example sanitary, home appliance, furniture, industry, automotive, duplicating machine etc.
For now we would like to introduce to you about “How to utilize TOK?”
with a past inquiry as example.

INQUIRY VIA WEBSITE (CUSTOMER)

-       The customer is a manufacturer related to screen doors like preventing from bugs
-       Desired to improve the motion when the screen door opens
-       The screen door has a spring roller inside that is turned to create tension to rewind to open position
-       To prevent from slamming they have already been using governor device which a competitor provided

PROBLEM
Current motion: When screen door rewinds to open position by spring force, the screen door sometimes stops on the way unintentionally.

CUSTOMER REQUIREMENT
They desired to have new function for preventing from the above problem,
and therefore they asked TOK if it was possible to create new product which is adaptable to acceleration speed of the screen door.

TOK DESIGNING
At first we had already an idea to create such a motion because we had an experience of developing for other application in the past.
Instead of the competitor product(governor device), TOK came up with a better solution: that is speed reducer using 2 types of spring inside.

ADVANTAGE

ü  Smooth rewinding according to acceleration speed
ü  Be unaffected by temperature ambient
ü  Allow screen door to move properly without stopping on the way
ü  Easy to operate to open screen door with a light touch
ü  High-durability: cost-effective

TOK can provide you the most promising idea for your application.
If you struggle to have desired motion, please let us know, we would be more than happy to have any inquiries always.

TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.


Written by Hiro
We would like to inform you that TOK has updated the certificates for ISO9001 and ISO14001. TOK acquired ISO9001 in 1999 and ISO14001 in 2000; respectively, 19 years and 18 years have already passed. We will always undertake to improve quality, and ensure environmental safety.


Written by Mayu

What is a magnetic torque limiter?

It generates torque from magnetic hysteresis resistance.
The magnet does not slide so magnetic torque limiter is more durable.






Advantages of using a magnet torque limiter compared with a coil spring torque limiter:

1.       High durability
2.       High speed revolution
3.       Stable torque
4.       Minimal sliding sound

    TLEU series                                                   TLES series













TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.


Written by Mayu




What is structure of coil spring torque limiter?

A coil spring is press-fitted in the sleeve, and when it turns, it slides and generates torque. The more it tightens a coil spring, the more it generates torque, but the more loosen coil springs, the lower it generates torque.






Advantages of using a coil spring torque limiter compared with a magnet torque limiter!
1.       Light Weight
2.       Compact Size
3.       Competitive Price


             TLD4 series                                                   TLD7 series
        
             





TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.

                                         
Written by Mayu
We are proud to present our new rotary damper TD130.
It is the smallest continuous rotation angle damper in TOK, so really convenient and versatile damper. TD130 meets your requirement in miniaturization. The quality of TD130 is guaranteed!


TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.


Written by Mayu

What’s Torque Limiter?

Torque limiter is a device that cuts off torque transmission when overload is applied. It is also called slip clutch. By preventing excessive rotation of the spindle, it prevents overload damage to the driven shaft and related to equipment.

TOK manufactures 2 types of torque limiters :
l  Spring Type using friction / resistance
Ø  Max. torque: 4kgf・cm
Ø  Max. allowable rotation speed: 400min-1
Ø  Life cycle time: 1 Mio. cycles

TLD4 series                                       TLD7 series

     


l  Magnet Type using magnetic force
Ø  Max. torque: 0.6kgf・cm
Ø  Max. allowable rotation speed: 2,000min-1
Ø  Life cycle time: 10 Mio. cycles

TLEU series                       








Application examples:

Sunshade of child seat                   Belt-winch
Printer / Copy machine                     ATM machine

TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.


Written by Hiro