A fast measuring device for involute gear tooth thickness

Abstract

The invention, which belongs to the technical field of mechanical processing detection, relates to a rapid measurement apparatus for the tooth thickness of an involute gear. A driving gear and an angle sensing gear that are in a gear driving connection mode are supported on a housing of the measurement apparatus; the driving wheel is fixedly connected with a movable measuring rod having an outer end with a measuring head; a reference measuring rod having an outer end with a measuring head is installed at one side of the movable measuring rod correspondingly; and the reference measuring rod and the housing are fixedly connected. Besides, an angle sensing gear rotation angle collection unit is installed on the housing; and a signal output terminal of the collection unit is connected with an intelligent measuring module. When the housing is controlled and thus the measuring head at the outer ends of the two measuring rods are embedded into corresponding tooth grooves of a to-be-measured gear and a rotation angle change relative to an initial position is obtained; and thus with conversion of an intelligent device, a needed tooth thickness parameter can be obtained conveniently, rapidly, and accurately.

Description

technical field [0001] The invention relates to a measuring device for the tooth thickness of a gear, in particular to a rapid measuring device for the tooth thickness of an involute gear, which belongs to the technical field of mechanical processing detection. Background technique [0002] The tooth thickness value of involute gears has always been one of the most important gear parameters in gear design, processing and mapping. How to accurately measure the tooth thickness value of gears is directly related to the stability of gear processing technology and the quality of finished products. . In the batch manufacturing process of gears, such as gear hobbing, gear shaping, gear milling, gear grinding, etc., if the accurate tooth thickness value cannot be measured quickly and effectively, it will inevitably have a negative impact on production efficiency and quality. [0003] As far as the applicant knows, for a long time, the most commonly used tooth thickness measurement ...

AI Technical Summary

Problems solved by technology

However, it can be found that the measurement of the common normal line and the cross-stick (ball) distance has certain limitations: 1. The measurement of the common normal line cannot be used for the measurement of internal gears due to the limitation of the measurement principle, and it cannot be used for helical gears with large helix angles and short tooth widths. Applicable, in addition, when encountering a gear with a large modulus or a short tooth height, it is impossible to measure due to the inability to obtain a suitable measurement point. In the above cases, only the cross-rod (ball) distance measurement can be used; During the measurement, the operator is required to manually fix the measuring rods (balls) placed in the two pairs of vertical tooth slots, and at the same time use a length micrometer to measure the distance across the rods (balls). It is also necessary to have an accurate "feel" and be able to find the extreme value of the cross-stick (ball) distance by feeling, so it is difficult for non-professionals to ensure accurate measurement results

However, practice has proved that these devices still have some deficiencies. First of all, in view of the measurement principle of the cross-stick (ball) distance, when the gear index circle increases, the required measuring device will also increase, and the manufacturing cost is huge. Obviously It is not economical, so it can only be used for the measurement of the distance between the gears with a small indexing circle. Secondly, the measurement range is limited and the inner and outer teeth cannot be used universally; in addition, these devices can only be used in fixed occasions and require The measurement operation can only be performed by moving the measured gear to the designated measurement position. For mass production, it is obviously time-consuming and laborious, and cannot be used as a measurement tool for production inspection and self-inspection.

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