Internal tooth and external tooth symmetry degree detecting device

Abstract

An internal tooth and external tooth symmetry degree detecting device comprises a base, wherein a linear groove is formed in the base. A gear abutting mechanism which can slide along the linear groove and a symmetry degree displaying mechanism are installed on the base. The gear abutting mechanism comprises a centering semicircular block, an arc surface formed by internal tooth small diameter parts of a gear to be detected is installed in the mode of being tightly attached to an arc surface of the centering semicircular block, and the gear to be detected is located through the arc surface of the centering semicircular block; then, a crab clamp type supporting claw at the head of an abutting block is clamped into two internal tooth grooves of the gear to be detected, the tail of the abutting block is connected with a compression spring, and the abutting block locates and abuts the gear to be detected under the effect of elasticity; the symmetry degree displaying mechanism comprises a conical measuring head which can stretch into an external tooth groove of the gear to be detected, the measuring head drives a sliding key at the tail to slide in the swing process, and the sliding key transmits the swing distance of the measuring head to a dial indicator through an L-shaped connecting block to be displayed. The internal tooth and external tooth symmetry degree detecting device can directly detect the internal tooth and external tooth symmetry degree value, integrates locating and calibration, and is quick and accurate in detecting process.

Description

technical field

[0001] The invention relates to the field of gearbox gear processing, in particular to a gear symmetry detection device for internal and external teeth. Background technique

[0002] With the widespread application of the double countershaft structure of gearboxes at home and abroad, the symmetry relationship between the internal teeth and the external tooth grooves of the gearbox gear must be strictly required.

[0003] The conventional detection method in China is the three-coordinate detection method. The three-coordinate detection method requires the aid of a three-coordinate measuring instrument. The basic principle is to directly compare the geometric shape of the measured gear, the theoretical position (size) and the actual position in the space coordinates. (Size) measurement errors. The three-coordinate measuring instrument generally uses three linear grating rulers as the measurement reference, and the electric trigger measuring head sends out the ...

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