Gas static pressure measuring head mechanism for car wheel detector

Abstract

The invention provides a gas static pressure measuring head mechanism for a car wheel detector. The gas static pressure measuring head mechanism comprises a measuring bar and a measuring head, wherein the measuring head is of a sphere shape and supported by a gas static pressure supporting mechanism connected to the measuring bar; the gas static pressure supporting mechanism is structurally characterized in that a containing part is connected to the measuring bar and provided with a measuring head supporting spherical surface, a certain gap is left between the supporting spherical surface and the measuring head, vent holes are arranged in the containing part, and the supporting spherical surface is provided with a plurality of throttling holes which are arranged symmetrically and communicated with the vent holes; and when gas flows in through the vent holes of the containing part, the gas enters in the gap between the measuring head and the supporting spherical surface through the throttling holes to form a gas membrane with certain rigidity and bearing capability, and then the measuring head can universally rotate on the supporting spherical surface. The gas static pressure measuring head mechanism has a creative structure, realizes the universal rotation of the measuring head on the supporting spherical surface, ensures the relative movement between the measuring head and detected wheels as pure rolling, can greatly reduce the driving power needed by detection and improves detection precision by forming the gas membrane with certain rigidity and bearing capability.

Description

technical field [0001] The invention relates to a new measuring head mechanism on an automobile wheel testing machine, especially a gas static pressure measuring head mechanism. Background technique [0002] Automobile wheels are an important component of automobiles, and are directly related to the safety and comfort of vehicles at high speeds. Among the key indicators of automobile wheel detection, the detection of radial runout and axial runout of automobile wheels is one of the detection indicators. The space size of the effective measurement parts for the axial runout and radial runout of automobile wheels is very small, and the detection efficiency must be considered. A measuring head mechanism is required to detect axial runout and radial runout at the same time. The probe mechanism can be divided into contact type and non-contact type. Due to the poor stability of the non-contact probe, the contact probe mechanism is generally used in engineering. During the detect...

AI Technical Summary

Problems solved by technology

In this way, not only the probe is easy to wear during the detection process, and the probe needs to be replaced frequently, but also the friction will affect the measurement accuracy

There are also automobile wheel detection machines that use rolling measuring wheels for detection, but it cannot completely guarantee that their relative motion is pure rolling, and this mechanism has a complex structure and is difficult to equip.

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