Phase testing fixture for spline and arc gap

Abstract

The utility model discloses a spline and arc gap phase testing fixture, which relates to the transmission shaft spline detection field and comprises a phase connecting block, the inner wall of the phase connecting block is provided with an internal spline, the center of the internal spline is provided with a central groove, and one end of the central groove close to a threaded section extends inwards along the radial direction to form a boss. The height of the boss meets the requirement that after the phase connecting block is matched with the spline shaft through a spline, the end face of the boss is flush with the end face of the threaded section, and a detection arc groove formed in the center of the boss is aligned with the arc notch. According to the utility model, two elements at different parts on the spline shaft are connected together by using the phase detection tool, and the position deviation of the spline and the arc gap is judged through the cylindrical mandrel, so that the measurement range and the flexibility are expanded.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft spline inspection, specifically to a phase inspection tool for splines and arc notches. Background Technology

[0002] In existing technology, when detecting the phase between the spline teeth and the two arc notches of the spline shaft, the spline shaft is placed inside a fixed spline sleeve, and the height of the contour lines on both sides of the arc is measured with a height gauge. The deviation between the tooth center and the arc notch is then calculated. However, the existing solution has the following drawbacks:

[0003] 1. The outline of the arc notch and outer circle of the spline shaft can only be visually estimated by the height gauge, and the two are difficult to match.

[0004] 2. There is a gap between the spline shaft and the spline sleeve, which affects the measurement accuracy;

[0005] 3. The phase error needs to be calculated, which introduces calculation errors.

[0006] 4. The measuring tools are bulky and cannot be used to measure the phase on the welded drive shaft. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a phase gauge for splines and arc notches. Using this phase gauge, two elements at different locations on the spline shaft are connected together, and the positional deviation between the spline and the arc notch is determined by a cylindrical mandrel.

[0008] The purpose of this utility model is achieved through the following technical solution: This phase gauge with spline and arc notch is used to inspect spline shafts. The spline shaft has an external spline on its spline section and an arc notch on its threaded section. The phase gauge includes a phase connecting block. An internal spline is provided on the inner wall of the phase connecting block. A central groove is opened in the center of the internal spline. The end of the central groove near the threaded section extends radially inward to form a boss. The height of the boss is such that after the phase connecting block and the spline shaft are splined, the end face of the boss is flush with the end face of the threaded section, and the detection arc groove opened in the center of the boss is aligned with the arc notch.

[0009] As a further technical solution, the width of the boss is the arc diameter of the arc notch of the standard spline shaft plus the allowable phase deviation, and the phase of the arc notch is detected by detecting the edges of the arc groove on both sides of the arc groove.

[0010] As a further technical solution, a cylindrical mandrel is also included, one end of which is provided with a detection head. When the detection arc groove and the arc notch are matched, a detection hole is formed for the detection head to extend into.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. By connecting two structures at different parts of the spline shaft with a phase connecting block, and relying on the cylindrical mandrel for pass / stop judgment, the problem of the arc notch contour line being difficult to match with the height gauge probe is solved, and the measurement steps are simplified. It can also be done without relying on the cylindrical mandrel, as long as the arc notch contour line is within the range of the arc groove edge.

[0013] 2. The phase connecting block and the spline shaft are always in a close and positioned state using the spline, which can eliminate the mating clearance;

[0014] 3. No need to calculate the difference for detection and judgment, eliminating measurement errors caused by calculation mistakes;

[0015] 4. No need to measure the height difference on both sides; a single measurement is sufficient, resulting in high detection efficiency.

[0016] 5. The lightweight and portable design allows for the measurement of the phase of the spline shaft and the arc notch anywhere, making it convenient, flexible, and fast, and expanding the measurement range and flexibility. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the phase connection block in this utility model.

[0018] Figure 2 This is a schematic diagram of the structure used for testing in this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the present invention after the detection head is fully inserted into the detection hole.

[0020] Figure 4 for Figure 3 The main view.

[0021] Figure 5 for Figure 4 A magnified view of a portion of region A in the middle.

[0022] Figure 6 for Figure 4 A magnified view of a portion of region B in the middle.

[0023] Figure 7 This is a schematic diagram of the structure of the present invention when the detection head cannot be inserted into the detection hole.

[0024] Figure 8 This is a schematic diagram of the structure of the detection head and detection hole when they interfere with each other in this utility model (viewpoint corresponding). Figure 5 ).

[0025] Figure 9 for Figure 8Enlarged image (viewpoint corresponding) Figure 6 ).

[0026] Explanation of reference numerals in the attached drawings: Spline shaft 1, Spline segment 11, External spline 111, Threaded segment 12, Arc notch 121, Phase connecting block 2, Internal spline 21, Center groove 22, Boss 23, Detection arc groove 231, Arc groove edge 232, Cylindrical mandrel 3, Detection head 31, Detection head outer circle 311, Detection hole 4. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings:

[0028] Example: As attached Figures 1-9 As shown, this phase inspection fixture for splines and arc notches includes a spline shaft 1, a spline segment 11, an external spline 111, a threaded segment 12, an arc notch 121, a phase connecting block 2, an internal spline 21, a central groove 22, a boss 23, a detection arc groove 231, an arc groove edge 232, a cylindrical mandrel 3, a detection head 31, an outer circle of the detection head 311, and a detection hole 4.

[0029] Reference Appendix Figure 2 The splined section 11 of the splined shaft 1 is provided with an external spline 111, and the threaded section 12 of the splined shaft 1 is provided with two symmetrically arranged arc notches 121.

[0030] like Figure 1 As shown, the phase connecting block 2 has a tile-like structure (i.e., a fan-shaped cross-section), which saves manufacturing costs. Of course, it can also be made into a sleeve shape (completely fitted onto the spline shaft 1). The inner wall of the phase connecting block 2 is provided with an inner spline 21, which can match the outer spline 111. A central groove 22 is opened in the center of the inner spline 21. The end of the central groove 22 near the threaded section 12 extends radially inward to form a boss 23. Preferably, the boss 23 can compensate for the difference in height between the major diameter of the spline section 11 and the major diameter of the threaded section 12. The height of the boss 23 is sufficient to ensure that after the phase connecting block 2 and the spline shaft 1 are splined, the end face of the boss 23 is flush with the end face of the threaded section 12. At the same time, the detection arc groove 231 opened in the center of the boss 23 can be aligned with the arc notch 121.

[0031] Furthermore, by machining the width of the boss 23 to the arc diameter of the arc notch 121 of the standard spline shaft 1 plus the allowable phase deviation, visual inspection can be performed without relying on the cylindrical mandrel 3. During visual inspection, observe the arc groove edges 232 on both sides of the arc groove 231. If both sides of the arc notch 121 (i.e., the left and right contour lines) are within the range of the arc groove edge 232, the phase is considered qualified. Figure 5 , 6As shown. If any one of the two sides (i.e., the left and right contour lines) of the arc notch 121 exceeds the range of the arc groove edge 232, it can be regarded as phase out-of-tolerance. For example, Figure 8 , 9 As shown, when visual inspection cannot determine, the cylindrical mandrel 3 can be borrowed for auxiliary determination, which can greatly improve the detection efficiency.

[0032] For example, Figure 3 , 4 , 5, 6 as shown, a detection head 31 is provided at one end of the cylindrical mandrel 3, and when the arc groove 231 and the arc notch 121 are engaged, an approximately cylindrical detection hole 4 is formed. During detection, the detection head 31 is inserted into the detection hole 4, and the phase can be judged as qualified according to whether it passes or not.

[0033] The working process of the present utility model:

[0034] During visual inspection, observe the arc groove edges 232 on both sides of the detection arc groove 231. If both sides (i.e., the left and right contour lines) of the arc notch 121 are within the range of the arc groove edge 232, the phase is judged as qualified, such as Figure 5 , 6 As shown. If any one of the two sides (i.e., the left and right contour lines) of the arc notch 121 exceeds the range of the arc groove edge 232, it can be regarded as phase out-of-tolerance. For example, Figure 8 , 9 As shown, when visual inspection cannot determine, the cylindrical mandrel 3 can be borrowed for auxiliary determination, which can greatly improve the detection efficiency.

[0035] For example, Figure 2 As shown, insert the detection head 31 of the cylindrical mandrel 3 into the detection hole 4. If the detection head 31 can be smoothly inserted, as Figure 3 As shown, it is determined as a qualified product. If the detection head 31 interferes with the detection hole 4 and cannot be smoothly inserted, as Figure 7 As shown, due to the circumferential offset of the arc notch 121 of the spline shaft 1, a certain distance is formed between the center of the detection arc groove 231 on the phase connection block 2 and the center of the arc notch 121 of the spline shaft, resulting in interference of the cylindrical mandrel 3 (detection head 31) and inability to be inserted, that is, it is determined as phase out-of-tolerance.

[0036] It can be understood that for those skilled in the art, equivalent replacement or change of the technical solution and the inventive concept of the present utility model should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A phase inspection tool for splines and arc notches, used to inspect a splined shaft (1), wherein the splined shaft (1) has an external spline (111) on its splined section (11) and an arc notch (121) on its threaded section (12), characterized in that: The device includes a phase connecting block (2), on the inner wall of which is provided an internal spline (21). A central groove (22) is opened in the center of the internal spline (21). The end of the central groove (22) near the threaded section (12) extends radially inward to form a boss (23). The height of the boss (23) is such that after the phase connecting block (2) and the spline shaft (1) are engaged by the spline, the end face of the boss (23) is flush with the end face of the threaded section (12), and the detection arc groove (231) opened in the center of the boss (23) is aligned with the arc notch (121).

2. The phase gauge for splines and arc notches according to claim 1, characterized in that: The width of the boss (23) is the arc diameter of the arc notch (121) of the spline shaft (1) plus the allowable phase deviation. The phase of the arc notch (121) is detected by detecting the arc groove edges (232) on both sides of the arc groove (231).

3. The phase gauge for splines and circular notches according to claim 1 or 2, characterized in that: It also includes a cylindrical mandrel (3), one end of which is provided with a detection head (31). When the detection arc groove (231) and the arc notch (121) are engaged, a detection hole (4) is formed for the detection head (31) to extend into.

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