Definition

1. Noun:
   • Gear: In mechanical and engineering contexts, "khớp răng" refers to a gear, a rotating machine part with cut teeth (cogs) that mesh with another toothed part to transmit torque or change speed, torque, or direction of a power source.
   • Gear Teeth, Cog: Specifically, it can refer to the individual teeth or cogs on a gear wheel.

Usage Examples

• Noun:
  • Động cơ này sử dụng một hệ thống khớp răng phức tạp. (This engine uses a complex gear system.)
  • Một khớp răng trên bánh xe bị mòn cần được thay thế. (A gear tooth on the wheel is worn and needs to be replaced.)

Advanced Usage

• Technical/Mechanical Context: The term is almost exclusively used in technical, mechanical, or engineering fields to describe components of machinery.
  • Thiết kế khớp răng ảnh hưởng trực tiếp đến hiệu suất của hộp số. (Gear design directly affects the performance of a gearbox.)

Variants and Related Words

• Bánh răng (n): Gear wheel. This is a more common general term for a gear.
  • Bánh răng chủ động và bánh răng bị động. (The driving gear and the driven gear.)
• Hộp số (n): Gearbox.
  • Hộp số tự động. (Automatic transmission/gearbox.)
• Sự ăn khớp (n): Meshing, engagement (of gears).
  • Sự ăn khớp giữa các bánh răng phải chính xác. (The meshing between the gears must be precise.)

Synonyms

• Bánh răng: Gear (wheel). This is the most common synonym.
• Nhông (n, informal): Sprocket, cog (often used for bicycle/motorcycle chain gears).

Related Phrases

• Khớp răng cưa: Refers specifically to a gear with straight-cut teeth resembling a saw's teeth.
• Truyền động khớp răng: Gear drive, gear transmission.
  • Hệ thống truyền động khớp răng rất hiệu quả. (The gear drive system is very efficient.)

Notes on Usage

• Field-Specific: "Khớp răng" is a specialized technical term. In everyday conversation about bicycles or cars, Vietnamese speakers more commonly use "bánh răng" or "số" (for gear in a transmission).
• Anatomical Reference (Historical/Literary): The reference to "engrenure" in the French dictionary points to an anatomical meaning (the gomphosis joint of a tooth in its socket). This usage is extremely rare in modern Vietnamese and is considered archaic or highly specialized medical terminology. The primary and almost exclusive meaning in contemporary Vietnamese is the mechanical one.

1. (kỹ thuật) Gear