Gear tooth groove internal diameter measuring instrument of internal gear

Abstract

The invention provides a gear tooth groove internal diameter measuring instrument of an internal gear. The gear tooth groove internal diameter measuring instrument of the internal gear comprises a supporting seat, a linear guide, a fixed block, a moving block, a transmission rod, a trigger and a digital display dial indicator. The linear guide is installed on the supporting seat, the fixed block is fixedly installed on the linear guide, and the moving block is installed on the linear guide in a sliding mode and is located in the front part of the fixed block. A fixed measuring column is arranged at the upper end of the fixed block, and a moving measuring column is arranged at the upper end of the moving block. The digital display dial indicator is installed on the front end of the supporting seat through an installation assembly, and a measuring rod of the digital display dial indicator is inserted into the supporting seat. The rear end of the transmission rod is connected with the front end of the moving block, the middle portion of the transmission rod is hinged at the upper end of the trigger, and the front end of the transmission rod abuts against the rear end of the measuringrod. The lower end of the trigger is buckled and pressed, and the moving block is driven to move forward along the linear guide by the transmission rod, so that the fixed measuring column is far awayfrom the moving measuring column. According to the gear tooth groove internal diameter measuring instrument of the internal gear, measuring is accurate, and time and labor are saved.

Description

technical field [0001] The invention relates to the technical field of detection equipment, in particular to an instrument for measuring the inner diameter of a tooth groove of an internal gear. Background technique [0002] In order to ensure the quality of the internal gear, the internal gear needs to be measured before leaving the factory to eliminate unqualified products. The detection items include the inner diameter M of the tooth groove. [0003] Such as figure 1 with figure 2 As shown, the inner wall of the internal gear a is provided with a ring of teeth b, and a tooth groove c is provided between the two teeth. When measuring the existing inner diameter micrometer, the two probes need to be inserted into the two coggles c on the same diameter, and then the distance between the two coggles c, that is, the length of the inner diameter M of the cogging, can be obtained by reading. [0004] This method has the following disadvantages: 1. When the measuring personn...

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Problems solved by technology

[0004] This method has the following disadvantages: 1. When the measuring personnel move the probes, they cannot ensure that the two measuring probes are embedded in the tooth grooves on the same diameter, resulting in a small length of the inner diameter M of the tooth grooves; 2. The measuring personnel place the When the internal gear is uneven, there will be a height difference between the two probes, resulting in a large length of the inner diameter M of the tooth groove; 3. The probe cannot match the structure of the tooth groove, resulting in a large error in the length of the inner diameter M of the tooth groove ; 4. The parts are small in size, and it is time-consuming and labor-intensive to observe the insertion of the probe into the tooth groove by naked eyes

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