External spline angle deviation testing fixture of double-end spline shaft

Abstract

The utility model provides an external spline angle deviation testing fixture for a double-end spline shaft, which relates to the technical field of detection tools and comprises a bottom plate, a first positioning plate, a second positioning plate and a filler gauge. The first positioning plate is fixed on the bottom plate; a sliding groove is formed in the bottom plate. The second positioning plate is detachably fixed on the bottom plate; when the second positioning plate is fixed on the bottom plate, the second positioning plate is fixed in the sliding chute in a sliding manner; a first inner spline hole is formed in the first positioning plate; a second inner spline hole is formed in the second positioning plate; the second inner spline hole and the first inner spline hole share the same hole axis; the second positioning plate comprises a sliding block end; the sliding block end is located in the sliding groove. When the sliding block end is attached to the inner wall of one side of the sliding groove, a gap space is reserved between the sliding block end and the inner wall of the other side of the sliding groove, and the feeler gauge can be inserted into the gap space in a clearance fit mode. The external spline angle deviation testing fixture of the double-end spline shaft provided by the utility model solves the problem of high production cost of the double-end spline shaft in the prior art, and can reduce the production cost of the double-end spline shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of detection tooling, in particular to a detection tool for the angular deviation of external splines of a double-headed spline shaft. Background Art

[0002] Spline connection is a common connection method, which consists of an internal spline and an external spline; both the internal and external splines are multi-tooth parts. The spline on the inner cylindrical surface is the internal spline, and the spline on the outer cylindrical surface is the external spline.

[0003] A double-headed spline shaft is a shaft part with two external splines on the shaft body. The functions of the two external splines are to be respectively connected and matched with the internal splines of other two parts, so as to achieve the effect of mutually driving and connecting two parts with internal splines; after two parts with internal splines are fixed by the upper spline shaft, there is an angular requirement. Therefore, when machining the external splines on the shaft body of the double-headed spline shaft, there are numerical requirements for the deviation between the tooth profile angles of the two external splines.

[0004] In the prior art, for example, a coaxiality detection tool for a double-headed spline shaft disclosed in Chinese Patent Application No. 201821967922.X can detect the coaxiality of the double-headed spline shaft. During the production process of the double-headed spline shaft, there will inevitably be errors between the tooth profile angles of the two external splines, and the errors within a certain range meet the requirements; however, during the use of the detection tool in the above patent, according to its judgment method of "when the detection rod 2 passes through the through hole 13, the guiding rod 3 passes through the guiding hole 14", this part of the error is not allowed to exist, because during the process of detecting the coaxiality, the two external splines of the double-headed spline shaft need to be completely aligned. If the structure of this comparative document is directly applied to judge the double-headed spline shaft and determine whether the angular deviation (the closest tooth sides of the two external splines of the double-headed spline shaft, the angle between the planes where the two sides are located) between the two external splines of the double-headed spline shaft is qualified (within a certain range, such as within ±0.2° is regarded as qualified), directly using the detection tool in the comparative document will cause some double-headed spline shafts within the error tolerance range to be judged as unqualified, thus increasing the production cost of the double-headed spline shaft. Summary of the Utility Model

[0005] In view of the above technical problems, the detection tool for the angular deviation of external splines of the double-headed spline shaft provided by the utility model can reduce the production cost of the double-headed spline shaft.

[0006] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0007] The external spline angle deviation gauge for a double-headed spline shaft provided by the present utility model includes a bottom plate, a first positioning plate, a second positioning plate, and a feeler gauge; the first positioning plate is fixed on the bottom plate; a sliding groove is provided on the bottom plate; the second positioning plate is detachably fixed on the bottom plate; when the second positioning plate is fixed on the bottom plate, the second positioning plate can be slidably fixed in the sliding groove; a first internal spline hole is provided on the first positioning plate; a second internal spline hole is provided on the second positioning plate; during the sliding process of the second positioning plate relative to the sliding groove, the second internal spline hole and the first internal spline hole share the same coaxial axis; the second positioning plate includes a slider end; when the second positioning plate is slidably fixed in the sliding groove, the slider end is located in the sliding groove; the two sides of the sliding groove in the extending direction are two parallel inner walls; when the slider end abuts against one of the two inner walls of the sliding groove, there is a clearance space between the slider end and the other inner wall of the two inner walls of the sliding groove, and the feeler gauge can be inserted into the clearance space in an interference fit manner.

[0008] The external spline angle deviation gauge for a double-headed spline shaft provided by the present utility model, preferably, the slider end includes an arc surface; the arc surface is provided at the bottom of the slider end; the axis of the arc surface is consistent with the coaxial axis of the second internal spline hole; when the slider end is fixed in the sliding groove, the arc surface of the slider end is tangent to the bottom plane of the sliding groove.

[0009] The external spline angle deviation gauge for a double-headed spline shaft provided by the present utility model, preferably, at one side of the slider end facing the inner wall of the sliding groove, a convex arc surface is provided.

[0010] The external spline angle deviation gauge for a double-headed spline shaft provided by the present utility model, preferably, the first positioning plate is detachably fixed on the bottom plate.

[0011] The above technical solution has the following advantages or beneficial effects:

[0012] The utility model provides a detection tool for the angle deviation of external splines of a double-headed spline shaft, which relates to the technical field of detection tooling and includes a bottom plate, a first positioning plate, a second positioning plate and a feeler gauge; the first positioning plate is fixed on the bottom plate; a chute is arranged on the bottom plate; the second positioning plate is detachably fixed on the bottom plate; when the second positioning plate is fixed on the bottom plate, the second positioning plate can be slidably fixed in the chute; a first internal spline hole is arranged on the first positioning plate; a second internal spline hole is arranged on the second positioning plate; during the sliding process of the second positioning plate relative to the chute, the second internal spline hole and the first internal spline hole share the same coaxial line; the second positioning plate includes a slider end; when the second positioning plate is slidably fixed in the chute, the slider end is located in the chute; the two sides of the chute in the extending direction are two inner walls parallel to each other; when the slider end abuts against one of the two inner walls of the chute, there is a gap space between the slider end and the other inner wall of the two inner walls of the chute, and the feeler gauge can be inserted into the gap space in an interference fit manner. The detection tool for the angle deviation of external splines of the double-headed spline shaft provided by the utility model solves the problem of high production cost of the double-headed spline shaft in the prior art and can reduce the production cost of the double-headed spline shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, the present utility model and its features, shapes and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale, and the focus is on showing the gist of the present utility model.

[0014] Figure 1 FIG. 9 is a schematic diagram of the overall structure of the detection tool for the angle deviation of external splines of the double-headed spline shaft provided in Embodiment 1 of the present utility model when detecting the double-headed spline shaft.

[0015] Figure 2 FIG. 13 is a schematic diagram of the connection structure between the first positioning plate and the bottom plate of the detection tool for the angle deviation of external splines of the double-headed spline shaft provided in Embodiment 1 of the present utility model.

[0016] Figure 3 FIG. 17 is a schematic diagram of the structure when the second positioning plate of the detection tool for the angle deviation of external splines of the double-headed spline shaft provided in Embodiment 1 of the present utility model is placed in the chute.

[0017] Figure 4 FIG. 21 is a schematic diagram of the structure of the detection tool for the angle deviation of external splines of the double-headed spline shaft provided in Embodiment 1 of the present utility model when the double-headed spline shaft is qualified.

[0018] Figure 5 FIG. 25 is a schematic diagram of the structure of the detection tool for the angle deviation of external splines of the double-headed spline shaft provided in Embodiment 1 of the present utility model when the double-headed spline shaft is unqualified. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. It should be noted that the terms used in the present utility model are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application.

[0020] The following will describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Therefore, the detailed description of the embodiments of the present utility model provided in the following drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Embodiment 1:

[0022] The external spline angle deviation checker for the double-headed spline shaft provided in Embodiment 1 of the present utility model is as Figures 1 to 5 shown, and includes a bottom plate 1, a first positioning plate 2, a second positioning plate 3 and a feeler gauge 4; the first positioning plate 2 is fixed on the bottom plate 1; a sliding groove 11 is provided on the bottom plate 1; the second positioning plate 3 is detachably fixed on the bottom plate 1; when the second positioning plate 3 is fixed on the bottom plate 1, the second positioning plate 3 can be slidably fixed in the sliding groove 11; a first internal spline hole 21 is provided on the first positioning plate 2; a second internal spline hole 31 is provided on the second positioning plate 3; during the sliding process of the second positioning plate 3 relative to the sliding groove 11, the second internal spline hole 31 and the first internal spline hole 21 are coaxial; the second positioning plate 3 includes a slider end 32; when the second positioning plate 3 is slidably fixed in the sliding groove 11, the slider end 32 is located in the sliding groove 11; both sides of the sliding groove 11 along the extending direction are two parallel inner walls; when the slider end 32 abuts against one of the two inner walls of the sliding groove 11, a clearance space is left between the slider end 32 and the other inner wall of the two inner walls of the sliding groove 11, and the feeler gauge 4 can be inserted into the clearance space with clearance fit.

[0023] During the process of detecting a double-headed spline shaft using the external spline angle deviation detector for the double-headed spline shaft provided in Embodiment 1 of the present utility model, one of the external splines of the double-headed spline shaft needs to be inserted into the first internal spline hole 21 for fixation, so that the double-headed spline shaft is located above the sliding groove 11. Then, by moving the second positioning plate 3 on the sliding groove 11, the other external spline of the double-headed spline shaft extends into the second internal spline hole 31. During this process, the slider end 32 of the second positioning plate 3 is always within the sliding groove 11. At this time, control the feeler gauge 4 to keep it in contact with the second positioning plate 3 and move it towards the inside of the sliding groove 11. If the feeler gauge 4 can be smoothly inserted into the sliding groove 11 and reach the bottom of the sliding groove 11, it is determined that this double-headed spline shaft is qualified; otherwise, this double-headed spline shaft is unqualified. Compared with the comparative document mentioned in the background art, the thickness of the feeler gauge 4 in this embodiment is less than the difference between the sliding groove 11 and the slider end 32. When the slider end 32 is within the sliding groove 11, there will be a spacing distance between the slider end 32 and the two inner side walls of the sliding groove 11 respectively. The sum of the spacing distances between the slider end 32 and the two inner side walls of the sliding groove 11 is the clearance space. The feeler gauge 4 is inserted into the clearance space with a clearance fit. Therefore, when the slider end 32 rotates compared to the second internal spline hole 31 and compresses part of the clearance space, the feeler gauge 4 may still be able to be inserted into the compressed clearance space. Therefore, the tooth groove angles of the two external splines of the double-headed spline shaft are allowed to have a certain deviation (after the feeler gauge 4 is inserted, the feeler gauge 4 may be in contact with both the slider end 32 and the inner wall of the sliding groove 11 at the same time, or there may be a clearance distance between the feeler gauge 4 and the inner wall of the sliding groove 11). However, the detector in the comparative document does not allow this error to exist. Therefore, the detector provided in this embodiment can determine some double-headed spline shafts within the allowable error range as qualified, thereby improving the qualification rate of double-headed spline shafts and reducing the production cost of double-headed spline shafts.

[0024] The external spline angle deviation detector for the double-headed spline shaft provided in Embodiment 1 of the present utility model solves the problem of high production cost of the double-headed spline shaft in the prior art and can reduce the production cost of the double-headed spline shaft.

[0025] As a preferred solution, in this embodiment, the slider end 32 includes an arc surface 321; the arc surface 321 is arranged at the bottom of the slider end 32; the axis of the arc surface 321 is consistent with the hole axis of the second internal spline hole 31; when the slider end 32 is fixed in the sliding groove 11, the arc surface of the slider end 32 is tangent to the bottom plane of the sliding groove 11. When the second positioning plate 3 is placed and fixed in the sliding groove 11, the arc surface 321 of the slider end 32 of the second positioning plate 3 is tangent to the bottom of the sliding groove 11. Therefore, it can be ensured that when there is a deviation in the tooth groove angle of the double-headed spline shaft, the arc surface 321 is always in contact with the bottom of the sliding groove 11, and the slider end 32 can normally lean against the bottom of the sliding groove 11 for support.

[0026] In this embodiment, it is preferably to use a feeler gauge 4 in the shape of a plate with flat upper and lower surfaces. At this time, if the side surface of the slider end 32 close to the chute 11 is also flat, it will cause the feeler gauge 4 to be inserted into a space with a certain angle on both sides. This space is wider at the top and narrower at the bottom. For some double-headed spline shafts that do not meet the requirements, the feeler gauge 4 can still be inserted partially, which hinders the inspector's judgment on the qualification of the double-headed spline shaft. To solve this problem, as a preferred solution, in this embodiment, at the side of the slider end 32 facing the inner wall of the chute 11, a convex 322 with an arc surface is provided. The feeler gauge 4 can move along the inner wall of the chute 11, and the convex 322 with the arc surface faces the direction of the feeler gauge 4. If it is a qualified double-headed spline shaft, the feeler gauge 4 can be normally inserted to the bottom of the chute 11. If it is an unqualified double-headed spline shaft, the feeler gauge 4 will be blocked by the convex 322, and there is a certain distance between the convex 322 and the bottom of the chute 11, which makes it obvious that the feeler gauge 4 cannot contact the bottom of the chute 11, thus facilitating the inspector's judgment on whether the double-headed spline shaft is qualified.

[0027] As a preferred solution, in this embodiment, the first positioning plate 2 is detachably fixed to the bottom plate 1. Since different double-headed spline shafts have different external spline sizes, by setting the first positioning plate 2 to be detachably fixed to the bottom plate 1, the bottom plate 1 can be made universal. By replacing the first positioning plate 2 with different internal spline holes (equipped with feeler gauges of different thicknesses), different-sized double-headed spline shafts can be detected, increasing the application scenarios of the equipment provided in this embodiment.

[0028] In summary, the present utility model provides an external spline angle deviation gauge for a double-headed spline shaft, which relates to the technical field of inspection tools and includes a bottom plate, a first positioning plate, a second positioning plate, and a feeler gauge; the first positioning plate is fixed on the bottom plate; a chute is provided on the bottom plate; the second positioning plate is detachably fixed on the bottom plate; when the second positioning plate is fixed on the bottom plate, the second positioning plate can be slidably fixed in the chute; a first internal spline hole is provided on the first positioning plate; a second internal spline hole is provided on the second positioning plate; during the sliding process of the second positioning plate relative to the chute, the second internal spline hole and the first internal spline hole are coaxial; the second positioning plate includes a slider end; when the second positioning plate is slidably fixed in the chute, the slider end is located in the chute; the two sides in the extending direction of the chute are two parallel inner walls; when the slider end abuts against one of the two inner walls of the chute, there is a clearance space between the slider end and the other inner wall of the two inner walls of the chute, and the feeler gauge can be inserted into the clearance space with a clearance fit. The external spline angle deviation gauge for a double-headed spline shaft provided by the present utility model solves the problem of high production cost of the double-headed spline shaft in the prior art and can reduce the production cost of the double-headed spline shaft.

[0029] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included within the patent protection scope of the present utility model.

Claims

1. An external spline angle deviation inspection tool for a double-headed spline shaft, characterized in that, It includes a bottom plate, a first positioning plate, a second positioning plate and a feeler gauge; The first positioning plate is fixed on the bottom plate; a sliding groove is provided on the bottom plate; The second positioning plate is detachably fixed on the bottom plate; when the second positioning plate is fixed on the bottom plate, the second positioning plate can be slidably fixed in the sliding groove; A first internal spline hole is provided on the first positioning plate; a second internal spline hole is provided on the second positioning plate; During the sliding process of the second positioning plate relative to the sliding groove, the second internal spline hole and the first internal spline hole are coaxial; The second positioning plate includes a slider end; when the second positioning plate is slidably fixed in the sliding groove, the slider end is located in the sliding groove; the two sides in the extending direction of the sliding groove are two parallel inner walls; when the slider end abuts against one of the two inner walls of the sliding groove, there is a clearance space between the slider end and the other inner wall of the two inner walls of the sliding groove, and the feeler gauge can be inserted into the clearance space in an interference fit.

2. The external spline angle deviation inspection tool for the double-headed spline shaft according to claim 1, characterized in that, The slider end includes an arc surface; the arc surface is arranged at the bottom of the slider end; the axis of the arc surface is consistent with the hole axis of the second internal spline hole; when the slider end is fixed in the sliding groove, the arc surface of the slider end is tangent to the bottom plane of the sliding groove.

3. The external spline angle deviation checker for the double-headed spline shaft according to claim 1, characterized in that, On one side of the slider end facing the inner wall of the sliding groove, there is a convex arc surface.

4. The external spline angle deviation detector for the double-headed spline shaft according to claim 1, characterized in that The first positioning plate is detachably fixed on the bottom plate.

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