28T single point suspension system

High quality, Reliability, Economy.

Bogie suspension systems transporting robust goods under harsh conditions.

Product feature:

HJ bogie with high precision, which can ensure diagonal tolerance of two axles (L1-L2) less than or equal to 5mm, also can ensure it less than or equal 3mm if there are special requirements;

High precision guaranteed by stamping:

Adopt stamping process on the installation plate to ensure the distance of housing at 0.5mm. (as shown below)

Forging parts instead of casting:

Upper and lower spring seat use qualified forging material (as shown below).Interior metal is more compacting, long service life and high yield strength. (Comparative statement for mechanical properties: forging and casting)

Top brand spare parts:

HJ bogie equipped with WanXiang brand QC bearing, high grade H62 pure brass bush and Mobil grease, which can work steadily and efficiently even in extreme cases.

Equalizing beam welding:

There are special requirement to machine a groove on the oil seal seat and use specialized tools to press the oil seal seat in order to ensure the distance tolerance less than or equal to 1mm.( as shown on the drawing )

Upper and lower spring seat welding process

Welding the plate first and then mill to ensure parallelism tolerance less than or equal to 0.1mm; use specialized tool to ensure the distance tolerance of seats s within 0.5mm.

Leaf spring technology process

On the process of positioning four pins, the key is to ensure the position of center hole of leaf spring and pin hole. We use drilling jig for leaf spring based on the center hole of leaf spring, and that three holes are machined at the same time to ensure the three holes on the same line; reduce the distance tolerance of pin hole between center hole to ensure that the axle and leaf spring are vertical.

Assembly technology

We adopt our special technology: other then using small u bolt to fix the leaf spring and axle, we also fix them by the four pins on the leaf spring pad and upper plate (shown as below).

Use specialized tool to ensure two axles parallel when assembly, ensure two axles parallel by the pin positioning even the fully loaded vehicle on strong impact. Ensure vehicle work under bearing stress evenly and reduce the wear for the tyre.

Most domestic company use small u bolt to fix only but not using the positioning on the four pins .It will be over proof between the axle and leaf spring when vehicle in operation without four pin positioning. The two axles will not be parallel thus will cause uneven on the trailer, which will make the tyre wear.