Crossed block type four-groove grinding clamp

Abstract

The invention provides a crossed block type four-groove grinding clamp. The crossed block type four-groove grinding clamp is mainly composed of a clamp body, a left bearing cap, a rotary shaft, a baffle, a pressing plate, a clamping nut, a positioning piece, a positioning pin assembly, a guide groove, a compression spring, an adjusting washer, a right bearing cap, a nut, a hand wheel, holding screws, a turning plate and the like. The rotary shaft is fastened in the clamp body through a pair of tapered roller bearings. The thickness of the adjusting washer can be adjusted so as to eliminate radial clearance and axial clearance of the rotary shaft. A pair of rack and gear is driven by a hydraulic oil cylinder to achieve rotation of the rotary shaft. The turning plate is fixed to the rotary shaft through a screw. The positioning piece and the guide groove are fixed to the turning plate. The positioning pin assembly is located in a center hole of the rotary shaft. The turning plate turns by 180 degrees under the effect of the oil cylinder, the rack and the gear. The crossed block type four-groove grinding clamp is simple in structure, reasonable in arrangement, high in work efficiency,low in production cost, stable in operation, easy and convenient to operate and capable of well meeting grinding requirements of crossed block type four-groove parts.

Description

technical field [0001] The invention relates to the field of jig technology, in particular to a four-slot grinding jig for a cross block. Background technique [0002] The cross block part is the part connected with the transmission shaft and the end face cam in the VE fuel injection pump. There are four slots on the cross block, numbered 1, 2, 3, and 4 in the clockwise direction, among which slots 1 and 3 are connected with the two forks of the transmission shaft, slots 2 and 4 are connected with the two forks of the end cam, The torque of the transmission shaft is transmitted to the end face cam through the cross block. Due to the high speed and high torque of the VE pump, the requirements for the machining accuracy of the four grooves of the cross block are very high, especially the requirements for the symmetry of the two grooves. If the symmetry is not good, it is easy to cause one of the two forks of the transmission shaft or the end face cam to be stressed, so that ...

AI Technical Summary

Problems solved by technology

If the symmetry is not good, one of the two forks of the transmission shaft or the end face cam will be stressed easily, so that the transmission will not be stable, the fork will be easily broken, and the service life of the VE fuel injection pump will be reduced.

In the past, the indexing method was used to grind four grooves respectively, that is, the first groove was ground first, and then the second, third, and fourth grooves were sequentially rotated by 90°, and the symmetry obtained by this grinding method was generally controlled at 0.15 mm. range, it is difficult to meet the requirement of 0.08 mm

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