1. Specifications:

2. Description:

A spring is an elastic object used to store mechanical energy. Springs are usually made out of spring steel. There are a large number of spring designs; in everyday usage the term often refers to coil springs.

Small springs can be wound from pre-hardened stock, while larger ones are made from annealed steel and hardened after fabrication. Some non-ferrous metals are also used including phosphor bronze and titanium for parts requiring corrosion resistance and beryllium copper for springs carrying electrical current (because of its low electrical resistance).

When a coil spring is compressed or stretched slightly from rest, the force it exerts is approximately proportional to its change in length (this approximation breaks down for larger deflections). The rate or spring constant of a spring is the change in the force it exerts, divided by the change in deflection of the spring. That is, it is the gradient of the force versus deflection curve. An extension or compression spring has units of force divided by distance, for example lbf/in or N/m. Torsion springs have units of torque divided by angle, such as N·m/rad or ft·lbf/degree. The inverse of spring rate is compliance, that is: if a spring has a rate of 10 N/mm, it has a compliance of 0.1 mm/N. The stiffness (or rate) of springs in parallel is additive, as is the compliance of springs in series.

Depending on the design and required operating environment, any material can be used to construct a spring, so long as the material has the required combination of rigidity and elasticity: technically, a wooden bow is a form of spring.

3. Applications:

operate with a tension load

4. Competitive Advantage:

1. High quality and reasonable price

2. Good after-sales service

3. High technology base

4. Famous brand with rich experience

5. 24 hours service response

6. Delivery the goods immediately when receiving the payment

7. Production is based on customers’ requirements

8. 100% strict test before shipment

Established in 1995, Changzhou Yufeng Vehicle Co.,Ltd is one of the largest electro-tricycle in China, covering more than 58000 square meters area with more than 50 technologists. Moreover, we mainly manufacture different electro-leisure vehicle for senior citizens, tricycle for sightseeing, small size electro-tricycle, transformer, motor, high-intensity synthesized car body, metal car body, glass fiber reinforced plastic car body and plastic parts of whole car depending on excellent equipment, advanced technique, strict quality management and a complete set of checkout methods.

Competitive Advantage:

1. We have our professional factory and produces many kinds of tricycles ourselves. This makes sure that we can guarantee quality, and technical excellence, which won a good reputation among our customers all over the world.

2. Strong supply ability, creative design apartment, high-tech skills and advanced equipment can surely meet every customer’s requirement.

3. We have professional service-team that helps customers to solve all kinds of problems in all processes of the transaction, installation and promotion.

4. Excellent after-sales service.

5. Certain discount will be given to customers that have established long term business relationship with us.

After-sale service

We provide after-sale spare parts. In addition, we need damage parts back to our company. We have office that set foreign countries.