At the Gasgoo Awards 2022, Gränges’ two-piece collapsible tube has been entered as one of the top 100 players in China’s new automotive supply chain.

Gasgoo Awards 2022 Entrant: Landai Technology's Balance Box Assembly

Photo credit: Landai Technology


The role of the balance shaft is to use an eccentric mass block to offset the first or second order vibrations of the engine caused by the reciprocating motion of the piston connecting mechanism during rotation. The dual balance shaft balance box assembly places two balance shafts symmetrically about the centerline of the cylinder. The two shafts rotate in opposite directions. The speed is twice the engine speed and is used to balance the reciprocating inertia of the second stage of the engine.

Gasgoo Awards 2022 Entrant: Landai Technology's Balance Box Assembly

Photo credit: Landai Technology

The problem with this design is the gear section of the engine’s crankshaft transmission. Cyclical changes in sequential ignition and lack of shaft stiffness produce large torsional vibrations, resulting in high partial momentary vibration accelerations and severely affecting gear engagement. A complete balance box. Unstable power input is prone to serious gear knocking problems. Although the vibration problem due to the second stage reciprocating inertia force was eliminated, the gear knocking problem was greatly affecting his NVH effect of the engine, reducing the comfort of the vehicle.

In general, anti-backlash gear can effectively solve the problem of knocking and screaming. The design steps of the anti-backlash gear include main and auxiliary gear parameter design and MASTA modification simulation, C-spring stiffness and torque setting, rational design of shaft and shell backlash, shell CAE modal analysis and structural optimization. included. and so on.

After the design is finalized, it must be manufactured through precision gear machining, gear grinding and trimming, gear profile and gear lead Fourier detection, and assembly in a dust-proof environment, and finally the product quality of the balance box We can guarantee it.

Unique Advantages:

Landai Company started developing dual balance shaft balance box assembly in 2017, breaking the technical barriers of foreign manufacturers and realizing the first domestic balance box product with completely independent intellectual property rights, from research to Formed a set of complete balance box assembly system and processes of development, manufacturing, assembly, testing and testing. Currently, we have the top market share for balance boxes for home use.


Suitable for various engines that need to reduce vibration due to two-stage reciprocating inertia force.


Fuel engine, new energy DHT model.


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