jackscrew

Thân thiện

A mechanic uses a jackscrew to lift a car.

Definition

1. Noun:
   • A mechanical lifting device: A "jackscrew" is a type of jack that uses a screw mechanism to lift or apply great force. It operates by turning a screw thread to raise or lower a load.

Usage Examples

• Noun:
  • The mechanic used a jackscrew to lift the heavy machinery for repair.
  • For precise height adjustment, a jackscrew is more reliable than a hydraulic jack in some applications.

Advanced Usage

• Technical/Engineering Context: In engineering, a jackscrew is often used for its fine control and ability to maintain a position without continuous power, such as in leveling systems or aircraft trim mechanisms.
  • The aircraft's stabilizer is adjusted by an electrically powered jackscrew.

Variants and Related Words

• Screw jack: A synonymous term for jackscrew.
• Jack (noun): A broader category of devices for lifting heavy objects, which includes hydraulic jacks and jackscrews.

Synonyms

• Screw jack
• Mechanical jack (when specifying the screw type)

Notes on Meaning

• The term specifically refers to the screw-operated type of jack. It is distinguished from other jacks (e.g., hydraulic, pneumatic) by its primary operating principle.

Học thuật

Noun

1. screw-operated jack

Từ đồng nghĩa

• screw jack