Product Description

Product Parameters

Company Profile

HangZhou ZJD Rail Equipment Co., Ltd. Was established in 2012, which is a professional manufacturer of rail equipment and accessories. ZJD is mainly engaged in the design, production, sales and service of main products for railway high-speed rail EMUs, ordinary passenger cars, subways, locomotives, and freight wagon. At the same time, ZJD actively expands to other industries such as port machinery, energy and heavy industry.

ZJD is located in Xihu (West Lake) Dis. Economic Development Zone, Xihu (West Lake) Dis. District, …

Certifications

1.Bogie  

• Bogie technical characteristics
• The bogie structure can adjust slant of the body(passenger car), difference of the wheel load.
• Material of the each part meets railway industry standards and could use alternative material according to different regions and national standards
• Standard parts and general parts are used for each part and should be interchangeable.
• Design life is over 3 million km or 30 years
• Noise reduction measures(passenger car) for major components
• Different types of wheels can be used such as cast steel wheels, rolling forging wheels, elastic wheels
• The preliminary suspension is a metal rubber spring (passenger car), or a cylindrical coil spring with a vertical hydraulic shock absorber (passenger car), and the Secondary suspension is an air spring with an anti-roll torsion bar (passenger car)
• The mainframe is evaluated by finite element stress analysis and fatigue strength; Manufacture, welding follow railway standards, and with good corrosion resistance.
• Traction and transmission device are safe and reliable after simulated operation test.
• Easy to install, disassemble and have good maintainability

The company is professional in producing railway car fittings. Main products include carbon steel, B steel, C steel and E steel castings as bolster, side frame, beering adapter, side bearing brace, bottom center plate, impacting brace, rear draft lug, center plate brace, top side bearer, valve brace, coupler bracket and 16&17 type coupler parts; steel forgings as bracket, top center plate, yoke, drive disk, strut, brake hub, front cover, rear gear, pushing awl, middle pulling rod and draft gear components.
Our company can manufacture many kinds of bogies, such as scheffel bogie, metro bogie, and railway wagon bogie and so on. Following is our bogie producing line, we can manufacture the bogies according to customers’ drawings and technical specifications. We have the experiences of supplying bogies to many big customers, so we are very skilled in manufacturing the bogies. Customers can believe in the quality.

Standard Length Splined Shafts

Standard Length Splined Shafts are made from Mild Steel and are perfect for most repair jobs, custom machinery building, and many other applications. All stock splined shafts are 2-3/4 inches in length, and full splines are available in any length, with additional materials and working lengths available upon request and quotation. CZPT Manufacturing Company is proud to offer these standard length shafts.

Disc brake mounting interfaces that are splined

There are 2 common disc brake mounting interfaces, splined and center lock. Disc brakes with splined interfaces are more common. They are usually easier to install. The center lock system requires a tool to remove the locking ring on the disc hub. Six-bolt rotors are easier to install and require only 6 bolts. The center lock system is commonly used with performance road bikes.
Post mount disc brakes require a post mount adapter, while flat mount disc brakes do not. Post mount adapters are more common and are used for carbon mountain bikes, while flat mount interfaces are becoming the norm on road and gravel bikes. All disc brake adapters are adjustable for rotor size, though. Road bikes usually use 160mm rotors while mountain bikes use rotors that are 180mm or 200mm.

Disc brake mounting interfaces that are helical splined

A helical splined disc brake mounting interface is designed with a splined connection between the hub and brake disc. This splined connection allows for a relatively large amount of radial and rotational displacement between the disc and hub. A loosely splined interface can cause a rattling noise due to the movement of the disc in relation to the hub.
The splines on the brake disc and hub are connected via an air gap. The air gap helps reduce heat conduction from the brake disc to the hub. The present invention addresses problems of noise, heat, and retraction of brake discs at the release of the brake. It also addresses issues with skewing and dragging. If you’re unsure whether this type of mounting interface is right for you, consult your mechanic.
Disc brake mounting interfaces that are helix-splined may be used in conjunction with other components of a wheel. They are particularly useful in disc brake mounting interfaces for hub-to-hub assemblies. The spacer elements, which are preferably located circumferentially, provide substantially the same function no matter how the brake disc rotates. Preferably, 3 spacer elements are located around the brake disc. Each of these spacer elements has equal clearance between the splines of the brake disc and the hub.
Spacer elements 6 include a helical spring portion 6.1 and extensions in tangential directions that terminate in hooks 6.4. These hooks abut against the brake disc 1 in both directions. The helical spring portion 5.1 and 6.1 have stiffness enough to absorb radial impacts. The spacer elements are arranged around the circumference of the intermeshing zone.
A helical splined disc mount includes a stabilizing element formed as a helical spring. The helical spring extends to the disc’s splines and teeth. The ends of the extension extend in opposite directions, while brackets at each end engage with the disc’s splines and teeth. This stabilizing element is positioned axially over the disc’s width.
Helical splined disc brake mounting interfaces are popular in bicycles and road bicycles. They’re a reliable, durable way to mount your brakes. Splines are widely used in aerospace, and have a higher fatigue life and reliability. The interfaces between the splined disc brake and BB spindle are made from aluminum and acetate.
As the splined hub mounts the disc in a helical fashion, the spring wire and disc 2 will be positioned in close contact. As the spring wire contacts the disc, it creates friction forces that are evenly distributed throughout the disc. This allows for a wide range of axial motion. Disc brake mounting interfaces that are helical splined have higher strength and stiffness than their counterparts.
Disc brake mounting interfaces that are helically splined can have a wide range of splined surfaces. The splined surfaces are the most common type of disc brake mounting interfaces. They are typically made of stainless steel or aluminum and can be used for a variety of applications. However, a splined disc mount will not support a disc with an oversized brake caliper.