Hepu Power EF7000-HP-A Gearbox – now in mass production – is purpose‑built for counterbalanced lithium‑ion forklifts. It features a three‑stage parallel‑shaft design with integral helical gears, and has been validated under heavy‑load climbing and prolonged continuous operation. With its one‑piece housing and precision gear meshing, the unit focuses on high efficiency, low noise, and compact lightweight construction, offering a mature, standardised transmission solution for forklift OEMs.

I. Transmission Performance

• Wide‑ratio three‑stage helical gear train (41/51) delivers up to 7,800 N·m output, providing ample traction for full‑load starts and steep ramps – no power shortage under heavy loads.
  
• Gear parameters optimised by simulation significantly reduce running noise and vibration, enhancing operator comfort – ideal for cold storage, food plants, pharmaceutical workshops, and indoor warehouses.
  
• Micro‑surface modification of gear teeth ensures smooth meshing and low power loss; maximum transmission efficiency reaches 94%, cutting energy waste and extending vehicle range by 8‑15%.
  
• High‑strength, high‑rigidity alloy steel with precision machining withstands severe shock loads from full‑load climbing and frequent stop‑start cycles, offering long wear life.
  

II. Integrated Vehicle Packaging Advantages

• Compact, lightweight design with a total weight of 83 kg; integral cast housing minimises space occupation, facilitating battery layout and optimising vehicle counterweight balance.
  
• Standardised motor mounting spigot allows direct fit with Hepu motors, streamlining assembly at the OEM stage.
  

III. Durability and Protection

• Fully sealed housing with multiple sealing elements prevents oil leakage even in dusty or humid workshop environments, ensuring long‑term stability.
  
• Large oil sump enables efficient gear‑oil circulation and heat dissipation; oil temperature remains controlled during extended heavy‑duty operation, preventing premature wear of gears and bearings.
  
• Gears are case‑hardened and tempered for resistance to abrasion and pitting, significantly extending overall service life and reducing after‑sales replacement costs.
  

IV. Environmental Adaptability

• Stable operation across a wide temperature range from ‑40°C to 55°C, suitable for various plant conditions.
  
• Vibration‑resistant housing performs reliably on rough outdoor surfaces, including ports and mining sites.
  
• Full‑metal anti‑corrosion housing provides dust and moisture protection, ideal for high‑dust, high‑humidity environments such as building‑material plants and storage facilities.
  

V. Standardised Mass Production and Reliable Supply

The EF7000‑HP‑A gearbox is manufactured on automated machining and assembly lines. Every unit undergoes comprehensive end‑of‑line testing, including no‑load and load noise checks, as well as seal integrity tests. High part‑to‑part consistency ensures controllable durability. The standardised outer dimensions support customisation of gear ratios and mounting points to suit different tonnage models, enabling large‑volume orders with consistent, uninterrupted supply for forklift manufacturers.

Hepu Power EF7000‑HP‑A Gearbox is more than a single mechanical component – it is a complete drive solution for lithium‑ion forklift traction systems. Balancing transmission efficiency, vehicle packaging, NVH performance, long‑term durability, and volume production, it addresses common industry pain points such as excessive noise, oil leakage, limited space, and cumbersome maintenance – providing stable, cost‑effective standardised transmission services for electric material‑handling equipment OEMs.