JPS6031002A - Instrument for measuring width of snap-ring attaching groove - Google Patents

Abstract

PURPOSE:To measure the width of a snap-ring attaching groove readily and accurately, by providing a driving means, which makes the main bodies of a measuring instrument approach and move away, so that the main bodies of the measuring body are engaged in the snap-ring attaching groove. CONSTITUTION:A pair of main bodies 12 and 12' of a measuring instrument is provided in a groove-width measuring instrument 10 for a snap-ring attaching groove. A driving means 14 makes the main bodies 12 and 12' approach and move away each other. Recesses 12a and 12'a are provided at the lower parts of the facing surfaces of the pair of the main bodies 12 and 12' of the measuring instruments. Measuring probes 16 and 16' having tapered surfaces 16a and 16'a on the upper surfaces are fixed by screws 18 and 18' so that the probes are protruded into the recesses. A groove-width display 34 is provided on a recess 12c at the upper surface of one main body of the measuring instrument, e.g., 12'. The width of the snap-ring attaching grove 1a is measured based on the interval between the main bodies 12 and 12' of the measuring instrument.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to 1. For example, when assembling an automatic Ichikawa transmission, a snap ring is attached to the output shaft of the transmission to select a snap ring that fits the groove. It is.

For example, as shown in Fig. 1, a transmission gear 2 and a synchromesh sleeve 3 are attached to the output shaft l of an automobile transmission, and these parts are attached to a snap ring provided at the tip of the output shaft l in a groove 1a. Removal is prevented by attaching snap ring 4. When installing this snap ring, it is necessary to select a snap ring that matches the groove width of the groove, but in the past, workers had to select snap rings and applings with three different thicknesses based on their sense of feeling. Play could occur and proper installation could not achieve accuracy.

The purpose of the present invention is to install a snap ring that can accurately measure the groove width so that a snap ring that fits the groove can be selected without relying on the operator's intuition. An object of the present invention is to provide a groove width measuring tool.

Embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show a groove width measuring tool 10 for a snap ring mounting groove according to the present invention.

This groove 111 measuring tool 10 has a pair of measuring tool bodies 12°12
', and a driving means 4 for moving these measuring instrument bodies 12 and 12' toward and away from the phase W.

The pair of measuring instrument bodies 12, 12'' have recesses 12a, 12''a on opposite sides thereof, and a measuring element 16. 16' is secured by screws 18.18'' (18 not shown). As shown in FIG. 2, the measuring instrument main body 12' has a pair of guide rods 20.20 and screws 22.20.
22 and these guide rods 20.2
0 is slidably penetrated through a direct hole (not shown) in the measuring tool main body 12.

In the illustrated embodiment, the drive means 14 is connected to the measuring device body 12''.
It consists of a cylinder 26 which is flanged and fixed by screws 24 to the piston rod 2 of this cylinder 26.
6a passes through the through hole 12'b of the measuring tool main body 12', and further passes through the through hole 12b of the measuring tool main body 12, and is fixed to the measuring tool main body 12 by fixing bolts 30, 32.

Therefore, by expanding and contracting the piston 26a of the cylinder 26, the measuring instrument bodies 12, 12' can be moved toward or away from each other.

The groove width measuring tool 10 of the present invention further has a groove L added to the recess 12c on the upper surface of one measuring tool main body, for example, 12'.
In the embodiment shown in FIG. 9, the groove width indicator 34 has a detector 36 that expands and contracts in accordance with the distance from the measuring instrument main body 12. It consists of a displacement tire gauge 38. Measuring head 16
．． 16' ears the tapered surfaces 16a and 16'a, so the distance between the measuring tool bodies 12 and 12' varies depending on the groove width of the groove 1a, and the distance between the measuring tool bodies 12 and 12' varies depending on the groove width of the groove 1a. The groove width can be measured from the interval of °.

As can be seen in FIG. 3, the dial gauge 38 is shown to have three color-coded measuring ranges a, b, and c, corresponding to the snap rings having three different thicknesses.

The usage condition of the groove width measuring tool 10 of the present invention can be roughly understood from the above, but as shown in FIG. The measuring tool 10 of the present invention is placed on the sleeve 3, and the driving means 14 is driven to move the measuring stylus 16.
．． When attaching the snap ring with the output shaft l at 16°, the measuring tool main body 12.12'' is brought closer to fit into the groove la.

When attaching the snap ring, the distance between the measuring tool bodies 12 and 12' is determined according to the groove [1] of the groove 1a, and therefore, this distance is read and indicated by the dial gauge 38, which is the groove width indicator 34, and the measuring range a is determined. , b, and c, the snap ring 4 that matches the groove 1a can be selected for this snap ring installation. After the measurement, the driving means is driven in the opposite direction to separate the measuring instrument main body 12, 12', and the output shaft 1, which is the object to be measured, can be removed.

According to the present invention, as described above, the groove l] of the groove can be easily and accurately measured by attaching the snap ring to the object to be measured, and since the structure of the measuring tool is extremely simple, it is economical. Obtainable.

[Brief explanation of drawings]

Figures 1 and 2 are a vertical cross-sectional view of a groove width measuring tool and a cross-sectional view taken along the line A-A' in Figure 1, and Figure 3 is a plan view of a dial gauge, FIG. 4 is a cross-sectional view of the snap ring in its attached state. 1 ---- 1 output shaft, 1 a ---- Snap ring extra edition is groove, 4 ------- Snap ring, 10 -
11--Snap ring installation groove RL measuring tool, 1
2, 12' ------1 Measuring tool body, 14----
one driving means, 16.16'----measuring element, 16a;
16"a----Tapered surface, 26----Cylinder, 26a----One piston rod, 34---One groove 11 indicator, 36----Detector, 38- ------
dial gauge. Patent Applicant 1] No Jidosha Kogyo Co., Ltd. JlI/B 3rd Hook Figure 2 N4

Claims (3)

[Claims] (1) Attaching the snap ring to a workpiece having a groove involves attaching a pair of 411 fixture bodies, each having a tapered measuring element to be inserted into the groove, and a pair of measuring instrument bodies. The snap ring installation includes a driving means for moving the pair of measuring tool bodies closer to each other and moving them apart so as to fit into the groove, and a driving means for moving the pair of measuring tool bodies closer to each other and separating them so as to fit into the groove, and a pair of measuring tool bodies that corresponds to the insertion depth of the tapered gauge head. The snap ring extra edition is a groove width measuring tool, characterized in that the snap ring attachment is equipped with a groove width indicator that displays the width of the groove from the spacing of the main body. (2) The snap ring attachment according to claim 1, wherein the driving means is comprised of a cylinder having a piston rod fixed to one measuring tool body and slidably penetrating the other measuring tool main body. Groove width measurement tool. (3) According to claim 1 or 2, the width indicator is a dial gauge that is attached to one measuring tool body and has a detector that expands and contracts in accordance with the distance from the other measuring tool body. The snap ring installation described uses the groove groove 11 measuring tool.