Precision limit device for eliminating axial clearance of driven wheel and its assembly method

Abstract

The precision limit device and its assembly method for eliminating the axial clearance of the driven wheel, the driven wheel shaft is installed between the two arms of the support seat through the two rolling bearings in the inner hole of the driven wheel, and the characteristic is that one end of the driven wheel shaft is provided with a shoulder; the other One end is provided with a C-shaped spacer and a hoop, the C-shaped spacer is sleeved on the driven wheel shaft, and the hoop is sleeved on the outer circle of the C-shaped spacer. Optimizing scheme The two assembly holes on the double arms of the support base are one large and one small: they are respectively matched with the shoulder of the driven wheel shaft and the C-shaped spacer. In the present invention, the axial movement of the driven wheel is effectively limited by the C-shaped spacer ring and the hoop. Two screws are used on the side of the hoop to connect with the support seat to completely stop the rotation of the driven wheel shaft. The driven wheel can only rotate through the rolling bearing, so that the driven wheel The resistance is reduced. This design structure reduces the thickness accuracy requirements of each processed part, making assembly and maintenance easier, and the assembly can be easily completed at one time, and there is no axial movement, ensuring that the driven wheel rotates through the rolling bearing. The principle of the invention is clear, and the process structure is simple.

Description

technical field [0001] The invention relates to a driven wheel axial limit device, which is characterized in that it can eliminate the axial gap of the driven wheel, and the shaft holes on both sides of the support seat are easy to process, and the concentricity is easy to ensure. It is suitable for limiting the axial gap of the driven wheel. Precision electromechanical system. The invention also relates to an assembly method of the precision limit device. Background technique [0002] Ordinary conventional driven wheel axial limit device such as figure 1 Shown, support seat 1, driven wheel shaft 2, spacer ring 3, driven wheel 4, rolling bearing 5, shaft retaining ring 6. The inner width of the arms of the support seat 1 should theoretically be equal to the width of the two spacers 3 plus the outer width of the two rolling bearings 5; but in practice, due to the existence of part processing errors and measurement errors, it is always found that either There is a gap in th...

AI Technical Summary

Problems solved by technology

The inner width of the arms of the support seat 1 should theoretically be equal to the width of the two spacers 3 plus the outer width of the two rolling bearings 5; but in practice, due to the existence of part processing errors and measurement errors, it is always found that either There is a gap in the axial dimension, and the driven wheel can move axially, which is not allowed for a precision transmission mechanism that needs to limit axial movement; assembly, which increases man-hours for assembly

[0003] For the above two cases, whether it is found that there is a gap in the axial dimension during assembly or the axial dimension is too tight, as long as it is a driven wheel mechanism that expects no axial clearance, the usual method is to determine the width of the spacer by measuring and reprocess a For a suitable spacer, if there is no lathe nearby, or if there is a lathe but no master lathe to operate, then the assembly work will stop; if there are many driven wheel sets to be assembled, each one must be dressed like this, Seriously affect production efficiency; if you want to replace the driven wheel at the customer site, the width of the old and new driven wheels must not be exactly the same, there will be machining errors, and the spacer ring will also need to be replaced. The replacement work cannot be completed smoothly

This kind of design, which depends entirely on the size of the parts, often brings a lot of inconvenience and trouble in production and maintenance, which is not conducive to working faster, better and more economically.

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