Method and device for centering a wheel
OwnerPeter Lieinventor
Life of this patent
Estimating the term…
Abstract
The invention relates to a method and a device for centring a wheel, especially a cycle wheel. The values of the lateral run-out and/or the radial run-out of the wheel rim are measured. The lateral run-out and/or the radial run-out of the wheel rim are then eliminated by rotating the spoke nipple. The lateral run-out and/or the radial run-out are determined by means of measuring devices which can be fixed to a centring stand and which comprise pointer mechanisms (18 and/or 20).
Claims15
Method for centering a wheel, especially a wheel of a bicycle, wherein the values of the lateral runout and/or the radial runout of the wheel rim are measured and the lateral runout and/or the radial runout are subsequently eliminated by rotating the spoke nipples,
- characterized in that
- a) the wheel hub is clamped in a wheel mount of a centering stand,
- b) the wheel is rotated, whereby, each of the maximum left and right lateral runout of the wheel rim (10) is determined as a measurement value from a complete revolution of the wheel,
- c) the measurement value of the left (respectively right) maximum lateral runout of the wheel rim (10) is recorded, including its mathematical sign, whereby a negative sign is associated with the measurement value left of the zero position and a positive sign is associated with the measurement value right of the zero position,
- d) the wheel is rotated by 180° and clamped,
- e) from a complete rotation of the wheel, each of the maximum left and right lateral runout of the wheel rim (10) is determined as a measurement value,
- f) the first left (respectively the first right) maximum lateral runout and the second right (respectively the second left) maximum lateral runout of the wheel rim (10) are subtracted from each other,
- g) the value determined in step f) is divided by 2, with a positive sign associated with the so obtained value,
- h) the value determined in step g) is subtracted from the right (respectively left) maximum lateral runout of the wheel rim (10),
- i) the wheel is rotated until a center pointer (40) of a pointer mechanism (18) points to the value determined in step h),
- j) the adjusting wheel of the pointer mechanism (18) is rotated, until the center pointer (40) points to zero,
- k) after a complete revolution of the wheel, the maximum left and right lateral runout of the wheel rim (10) is indicated by two maximum pointers (42, 44) of the pointer mechanism (18),
- l) the wheel is rotated, until the center pointer (40) of the pointer mechanism (18) agrees with one of the two maximum pointers (42, 44) which indicates the maximum left (respectively right) lateral runout of the wheel rim (10),
- m) the lateral runout of the wheel rim (10) is corrected in a conventional manner by turning to the spoke nipples, whereby the spoke indicated by the pointer mechanism (18) is tensioned or loosened via the spoke nipple, and
- n) the spokes are tensioned or loosened, starting in the region of the maximum left and right lateral runout of the wheel rim (10), sequentially in an alternating order and in at least two steps, with a corresponding number of revolutions of the wheel, until the left and right lateral runout remains within a minimum range.
Dependencies are inferred from the claim text.