Tool for detecting effective length of external spline

Abstract

The utility model discloses an effective length testing fixture for an external spline, which comprises an external spline shaft and an internal spline sleeve matched with the external spline shaft, a step is ground on one end face of the internal spline sleeve, and the circular ring surface at the end part of the internal spline sleeve is changed into two semicircular ring surfaces with different heights, so that the thickness difference of the spline sleeve is generated. According to the utility model, the internal spline sleeve is sleeved in the measured external spline shaft, and whether the end face of the external spline shaft is in the middle of the step is visually inspected, so that the requirement of rapid measurement is met, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of manufacturing and processing spline connectors, in particular to an external spline effective length checking tool. Background Art

[0002] With the rapid development of the mechanical industry, especially the automotive industry, the precision requirements for involute spline parts are becoming increasingly higher. Many customers also require the spline length of external splines to be measured. However, the production volume of external splines is relatively large, and the use of complex measuring tools such as micrometers for inspection is relatively inefficient. In addition, the spline portion of most external spline shaft parts has an R, so the effective length of the spline cannot be measured with a general-purpose inspection tool. Therefore, a detection tool that is easy to operate and has more intuitive inspection results is needed. Utility Model Content

[0003] The utility model aims to provide an external spline effective length detection tool, which has the advantage of being convenient for detecting the length of the external spline.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A tool for measuring the effective length of an external spline comprises an external spline shaft and an internal spline sleeve matching the external spline shaft. A step is ground on one end face of the internal spline sleeve so that the annular surface at the end of the internal spline sleeve becomes two semicircular annular surfaces of different heights, thereby creating a thickness difference of the spline sleeve.

[0006] By adopting the above technical solution, the internal spline sleeve is put on the external spline shaft to be tested, and it can be intuitively seen whether the end face of the external spline shaft is located between the two end faces of the step. If it is, it means that the effective length of the spline of the external spline shaft is within the qualified range. If the end face of the external spline shaft is higher than the highest end face of the step, it means that the external spline is too long. Similarly, if the end face of the external spline shaft is lower than the lowest end face of the step, it means that the external spline is too short. The operation is simple and the detection efficiency is improved.

[0007] Preferably, the side wall of the inner spline sleeve is provided with friction lines.

[0008] The above technical solution is adopted to prevent the inner spline sleeve and the hand from slipping, which affects the detection.

[0009] Preferably, the tolerance between the upper and lower end surfaces of the step does not exceed 0.003m.

[0010] By adopting the above technical solution, the maximum error of the effective length of the external spline does not exceed 0.003m, thereby improving product quality.

[0011] Preferably, both end edges of the internal spline sleeve are beveled.

[0012] The above technical solution is adopted to prevent workers from being cut by the edge of the internal spline sleeve.

[0013] In summary, the external spline effective length gauge is durable and has a good cost-effectiveness. Although the structure is simple, it can achieve measurement results that cannot be met by general-purpose gauges, solving measurement problems for enterprises. With good applicability, the external spline effective length gauge is particularly suitable for large-scale production sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of an embodiment;

[0015] Figure 2 Schematic diagram of the cross section of the internal spline sleeve.

[0016] Reference numerals: 1, spline shaft; 2, internal spline sleeve; 3, step; 4, friction pattern; 5, inclined surface. DETAILED DESCRIPTION

[0017] The following description is merely a preferred embodiment of the present invention, and the scope of protection is not limited to this embodiment. All technical solutions based on the principles of the present invention should be included in the scope of protection of the present invention. It should also be noted that improvements and modifications that do not depart from the principles of the present invention by ordinary skill in the art should also be considered within the scope of protection of the present invention.

[0018] See Figure 1 -- Figure 2 A tool for measuring the effective length of an external spline comprises an external spline shaft 1 and an internal spline sleeve 2 matched with the external spline shaft 1. The side wall of the internal spline sleeve 2 is provided with friction grooves 4 to prevent the internal spline sleeve 2 from slipping against the hand. A step 3 is ground on one end face of the internal spline sleeve 2 so that the circular surface at the end of the internal spline sleeve 2 becomes two semicircular surfaces of different heights. The height difference between the two semicircular surfaces does not exceed 0.003m. The edges at both ends of the internal spline sleeve 2 are beveled 5 to prevent the edges of the internal spline sleeve 2 from cutting workers.

[0019] Working principle: Put the internal spline sleeve 2 on the external spline shaft 1 to be tested, and you can intuitively see whether the end face of the external spline shaft 1 is located between the two end faces of the step 3. If it is, it means that the effective length of the spline of the external spline shaft 1 is within the qualified range, and the maximum length difference between the external splines does not exceed 0.003m; if the end face of the external spline shaft 1 is higher than the highest end face of the step 3, it means that the external spline is too long; similarly, if the end face of the external spline shaft 1 is lower than the lowest end face of the step 3, it means that the external spline is too short. The operation is simple, the detection efficiency is improved, and the detection accuracy is high.

Claims

1. An external spline effective length measuring fixture, comprising an external spline shaft (1), characterized in that: The invention also includes an inner spline sleeve (2) matched with the outer spline shaft (1), wherein one end surface of the inner spline sleeve (2) is ground with a step (3), so that the annular surface at the end of the inner spline sleeve (2) is transformed into two semicircular annular surfaces of different heights, thereby generating a thickness difference of the inner spline sleeve (2).

2. The external spline effective length measuring tool according to claim 1, characterized in that: The side wall of the inner spline sleeve (2) is provided with friction lines (4).

3. The external spline effective length measuring tool according to claim 1, characterized in that: The tolerance between the upper end face and the lower end face of the step (3) does not exceed 0.003m.

4. The external spline effective length measuring tool according to claim 1, characterized in that: The edges at both ends of the inner spline sleeve (2) are inclined surfaces (5).

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