A jig for processing a forklift gearbox case

Abstract

The invention relates to a clamp for processing a gearbox body of a forklift. The specific structure of the clamp is that a left pressing plate mechanism, an intermediate mechanism and a right pressing plate mechanism are correspondingly arranged on a bottom plate, wherein a first locating pin and a second locating pin are correspondingly arranged on the bottom plate parts at two sides of the intermediate mechanism; the left pressing plate mechanism comprises an arc-shaped pressing plate and a left pressing plate; the right pressing plate mechanism comprises a locating pressing plate and a right pressing plate; one side of the gearbox body to be processed, of the forklift, is a differential housing and the other side of the gearbox body to be processed, of the forklift, is a motor mounting housing; when the clamp is put into use, the gearbox body to be processed, of the forklift, is positioned on the first locating pin and the second locating pin, the arc-shaped pressing plate and the left pressing plate are pressed to the top part of the differential housing, the right pressing plate is pressed to the top part of the motor mounting housing, and the locating pressing plate is pressed onto a lug on the motor mounting housing, so that the gearbox body to be processed, of the forklift, can be positioned and clamped. The clamp is reliable to locate and compress; the problem of vibrating in processing can be solved; the one-point compressing in the prior art is adjusted to be multi-point compressing, thereby removing the influence of human factors on the workpiece clamping effect.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing equipment, and in particular relates to a clamp used for processing a forklift gearbox case. Background technique [0002] When the forklift gearbox housing is processed, special fixtures are usually used for positioning and clamping, and the processing is completed in two processes on the horizontal machining center. Since the gearbox housing is a key component in the forklift transmission system, the manufacturing precision is very high. The conventional fixture design not only ensures the reliable positioning and compression of the box body, but also ensures that the box body itself will not be subjected to clamping pressure. effect of tension. Too much clamping force will cause the box to deform, which will affect the manufacturing accuracy of the box; too small clamping force will affect the clamping effect of the box, and vibration will easily occur during processing, which wi...

AI Technical Summary

Problems solved by technology

Excessive clamping force will cause deformation of the box, which will affect the manufacturing accuracy of the box; too small clamping force will affect the clamping effect of the box, and vibration will easily occur during processing, which will also affect the manufacturing accuracy of the box

[0003] The characteristics of the existing box fixture are: simple structure, using 1 side and 2 pins for positioning, 4 auxiliary supports at the bottom and 4 pressure plates at the top for compression; easy to operate, after the workpiece is positioned, you only need to adjust the 4 auxiliary supports at the bottom to contact the workpiece And lock it and then press the pressure plate on the corresponding support point; the disadvantages are: the positioning is not reliable, the diameter of the two positioning pins of the box is small, the positioning distance is short, the overhang of the workpiece is long, and the lack of lateral support leads to insufficient positioning rigidity , it is easy to vibrate during cutting; the compression method of the box body is unreasonable, and the conventional pressure plate is used for compression. Since the box body is mostly thin-walled parts, it is easy to be deformed by the impact of the compression force; in addition, the compression force of the pressure plate is completely determined by the According to the experience of the operator, the fluctuation range of the pressing force is relatively large, which further exacerbates the potential danger of box deformation

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