Fixture for measuring precision of front forks of bicycles and motor-assisted bicycles

• Main Authors: CUI XIA, WEI JUNLAN, LI MINGYUAN, LYU YIQI
• Format: Patent
• Language: English
• Published: 04.02.2015
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The utility model provides a fixture for measuring the precision of the front forks of bicycles and motor-assisted bicycles, which comprises a bottom plate, a frame, a locking front fork lower die, a locking front fork upper die, an upper die right end cover, an upper cover left end cover, nuts, a sheath, a threaded rod, a handle, a to-be-measured front frock and a special-purpose shaft. The bottom plate is respectively fixed to the locking front fork lower die and the frame. The sheath is inlaid in the frame. The two nuts are locked at the lower part of the sheath. The locking front fork lower die is respectively connected with the upper cover left end cover and the upper die right end cover. The vertical pipe of the to-be-measured front frock is fastened in the V-shaped slots of the locking front fork upper die and the locking front fork lower die. The special-purpose shaft is arranged in the opening of the to-be-measured front frock. The threaded rod is connected with the handle. The bottom of the threaded rod is matched with the locking front fork upper die through the upper die right end cover and the upper cover left end cover. Through rotating the handle, the threaded rod is driven to slide up and down in the sheath. Meanwhile, the locking front fork lower die is driven to move up and down, so that the to-be-measured front frock can be loaded and clamped. According to the technical scheme of the utility model, to-be-measured front frocks are quickly clamped by the threaded rod, and are positioned in the V-shaped slots of the locking front fork upper die and the locking front fork lower die. Therefore, the measuring and positioning process is more convenient and faster. The fixture is more convenient in operation, and the precision measurement is more accurate and reliable. The manufacturing cost is lowered. Both the measurement speed and the measurement frequency are improved. In this way, the labor intensity is lowered, while the reliability is improved at the same time.