Progressive knocking device for interference fit assembly

Abstract

The invention discloses a progressive knocking device for interference fit assembly. The left side of a driving motor is rotatably connected to a worm, the worm is engaged to a worm wheel, the worm wheel is fixedly connected to a cam, a rotating wheel is attached below the cam, the rotating wheel is rotatably connected to the upper surface of a swing arm, the lower surface of the swing arm is rotatably connected to the upper end of a telescopic rod, the lower part of the telescopic rod sleeves the upper part of the sleeve, the lower end of the sleeve is rotatably connected to a device body, ahammer is fixedly connected to the lower surface of the left end of the swing arm, a spring is arranged on the bottom surface in the sleeve, the upper end of the spring leans against the lower end ofthe telescopic rod, and the left side of the worm is fixedly connected to a first bevel gear. The device drives the rotating wheel and the swing arm to swing up and down in a reciprocating manner through the cam, the swing arm drives the hammer head to knock the upper end of a shaft part in the reciprocating manner, so that the shaft part enters a hole part, the worm wheel and worm are great in driving torque, and therefore, the knocking vigor is ensured. A driving lead screw and a driven lead screw drive a worktable, the shaft part and the hole part to move upward continuously while the hammer head knocks to achieve continuous knocking assembly, and meanwhile, a shock absorbing mechanism is also arranged in the bottom of the device body.

Description

technical field [0001] The invention relates to a mechanical assembly device, in particular to a progressive knocking device for interference assembly. Background technique [0002] An interference fit is a fit with an interference where the tolerance zone of the hole is below the tolerance zone of the shaft. In the machining and manufacturing process, the fit state of two or more parts can be roughly divided into clearance fit, transition fit and interference fit. Interference assembly means that the paired shaft diameter is larger than the hole diameter, so special tools must be used to squeeze it in, or use the characteristics of thermal expansion and contraction to heat the hole, and quickly put it on the shaft while the hole diameter expands. The parts fit together tightly. [0003] At present, the interference cold assembly of the shaft and the hole mostly adopts the knocking method to make the shaft squeeze into the hole, but most of the existing interference assemb...

AI Technical Summary

Problems solved by technology

[0003]At present, most of the interference cold assembly of shaft parts and hole parts adopts the method of knocking to make the shaft parts squeeze into the hole parts, while the exist

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