CN201173756Y - Internal spline bar spacing vernier caliper - Google Patents

Abstract

The utility model discloses a vernier caliper for measuring the spacing between internal splines, which comprises a ball probe, a secondary scale and a main scale. The main scale is a right-angled component, a scale is arranged on its crossbar, and the drooping rod is a left measuring claw. The secondary scale is also a right-angled component, the drooping rod is a right measuring claw, a scale is arranged on the surface of its crossbar, and the secondary scale body is sleeved on the crossbar of the main scale and can move left and right. Ball probes are mounted on the outer sides of the left measuring claw and the right measuring claw, and the two ball probes are on the same axis and parallel to the crossbar of the main scale. During actual measurement, the corresponding ball probe is selected according to the size of the internal spline to be measured, and zero calibration is performed according to the design rod spacing size of the measured spline. The size that deviates from the zero position during actual measurement is the deviation value. The measurement is convenient, accurate and efficient, and there is no special requirement for the environment during measurement. It is particularly suitable as a measuring tool for batch detection of the spacing between internal splines at production sites.

Description

Internal spline bar spacing vernier caliper

technical field

The utility model relates to a length measuring tool, in particular to a special measuring tool for measuring the distance between inner spline rods.

Background technique

The fit of internal and external splines is one of the common structures in mechanical equipment. The spline rod spacing, tooth shape and position accuracy directly determine its fit quality. The measurement of the rod spacing of the external spline is relatively simple, and can be accurately measured with a conventional length vernier caliper, while the measurement of the rod spacing of the internal spline hole is much more difficult than that of the external spline. In the prior art, the measuring tool for measuring the distance between the internal spline rods is composed of a measuring rod and a standard gauge block. When measuring, put the measuring rod into the tooth groove opposite to the internal spline, and insert the standard gauge block between the two measuring rods until the standard Until there is no gap between the gauge block and the gauge rod, then add up the diameters of the two gauge rods and the thickness of the standard gauge block, and the accumulated value is the rod spacing value of the internal spline. Although the existing technology can accurately measure the rod spacing of the internal spline, the measurement accuracy is greatly affected by human factors, the measurement efficiency is low, and there are certain requirements for the environment, so it is not suitable for the detection and measuring tools of batch products on the production site.

Utility model content

The utility model mainly aims at the shortage of measuring the distance between the internal spline rods in the prior art, and proposes a vernier caliper for the distance between the internal spline rods, which has the advantages of simple structure, accurate measurement, convenient use and direct measurement value indicating the measurement result.

The utility model realizes the technical goal through the following technical solutions.

Vernier caliper with internal spline rod spacing, which includes ball measuring head, auxiliary scale and main scale. The main ruler is a right-angled component, the surface of the cross bar is provided with a scale, and the drooping bar is a left measuring claw. Described auxiliary chi is also a right-angled member, and the drooping bar is a right measuring claw, and its transverse surface is provided with scales, and the auxiliary chi main body is sleeved on the main chi cross bar and can move left and right. The improvement is that: the left side of the left measuring claw head of the main scale is equipped with a horizontally placed ball probe, and the right side of the right measuring claw head of the auxiliary scale is also equipped with a horizontally placed ball measuring head .

The ball probes are respectively arranged on the outer surfaces of the left measuring claw and the right measuring claw. The ball diameters of the two ball measuring heads are the same, and the two ball measuring heads are on the same axis, which is parallel to the main scale bar. Ball probes with different ball diameters are selected according to the size of the internal spline to be measured. The ball probes with different ball diameters have the same effective height H value within the same range, and can be measured on the same scale of the main scale bar.

Compared with the prior art, the utility model has the following positive effects:

1. The ball probe is installed on the outer surface of the left and right measuring jaws, which has a simple structure and low production cost;

2. The value indicates the measurement result, accurate measurement and convenient detection;

3. The measurement has no special requirements for the environment, the measurement operation is simple, and the measurement efficiency is high. It is suitable for batch product testing on the production site.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model.

Accompanying drawing 2 is the enlarged schematic view of the structure of the ball measuring head.

Detailed ways

Below in conjunction with embodiment and accompanying drawing, the utility model is further described.

The internal spline bar pitch vernier caliper shown in the accompanying drawing includes a ball measuring head 1, an auxiliary scale 2 and a main scale 3. The surface of the cross bar of the main chi 3 is provided with a scale 3.2, and the drooping bar of the main chi 3 is a left measuring claw 3.1. The cross bar surface of described auxiliary chi 2 is provided with scale 2.2, and auxiliary chi 2 is sleeved on the main chi 3 cross bar and can move left and right, and the drooping bar of auxiliary chi 2 is the right measuring claw 2.1. The outside of the head of the left measuring claw 3.1 and the right measuring claw 2.1 is equipped with a ball measuring head 1, and the two ball measuring heads 1 are on the same axis and are parallel to the cross bar of the main scale 3. The two ball probes 1 used to measure the splines in the same size have the same ball diameter, and the effective height H of the ball probes 1 is the same. In the actual measurement of the utility model, according to the size of the spline to be measured, the corresponding ball head diameter and the effective height H of the ball probe 1 are selected, and the caliper is calibrated to zero according to the designed rod spacing dimension of the spline to be measured, and the actual measurement The size that deviates from the zero position is the deviation value. In this embodiment, the rod spacing of 36 groups of Iveco internal splines is measured, the ball diameter of the ball probe 1 used is 3.5 mm, and the effective length of the ball probe 1 is fixed at 6 mm. The measurement result can directly read the rod spacing value of the measured internal spline from the corresponding position of the scale of the main scale 3 cross bar and the scale of the cross bar of the auxiliary scale. The internal spline rod spacing vernier caliper is used for convenient measurement, high detection efficiency, and no special requirements for the environment during measurement, and is especially suitable as a measuring tool for batch product inspection on the production site.

As a further improvement of the utility model, the scale on the cross bar is replaced by a scale, and the moving distance of the cross bar of the auxiliary scale 2 on the main scale 3 is directly digitally indicated by the scale. This scheme is more convenient and more accurate to measure.

Claims (3)

1, a kind of inside spline stick space vernier caliper, it comprises ball contact tip (1), secondary chi (2) and main scale (3); Described main scale (3) is the square member, and its cross bar surface is provided with scale (3.2), and following plumbing bar is left measuring jaw (3.1); Described secondary chi (2) also is the square member, and following plumbing bar is right measuring jaw (2.1), and its cross bar surface is provided with scale (2.2), and secondary chi (2) main body is linked in main scale (3) but move left and right on the cross bar; It is characterized in that: the ball contact tip (1) that the equipped level of left measuring jaw (3.1) the left side of head face of described main scale (3) is put, the ball contact tip (1) that the also corresponding equipped level of right measuring jaw (2.1) the right side of head face of secondary chi (2) is put.

2, inside spline stick space vernier caliper according to claim 1 is characterized in that: the ball contact tip (1) that is fitted on left measuring jaw (3.1) and the right measuring jaw (2.1) is on the same axis, and this axis is parallel with main scale (2) cross bar.

3, inside spline stick space vernier caliper according to claim 1 is characterized in that: the ball head of described ball contact tip (1) is of a size of φ 1.37～φ 8mm, and ball contact tip (1) significant height H is 2～8mm.

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