Detection tool for spline shaft

Abstract

The utility model discloses a testing fixture for a spline shaft, and relates to the technical field of automobile part detection, the testing fixture comprises a handle, a connecting plate and a ring gauge, the handle is arranged on one side of the connecting plate, the ring gauge is arranged on the other side of the connecting plate, the ring gauge is provided with a through hole, and the inner circumferential wall of the through hole is provided with an internal spline matched with an external spline of the spline shaft. A user sends the ring gauge into the valve body through the handle, the internal spline is matched with the external spline, the connecting plate abuts against the end face of the valve body, then a filler gauge is used for detecting whether a gap exists between the connecting plate and the end face of the valve body or not, if the filler gauge cannot be plugged in, it is indicated that the spline position degree of the spline shaft reaches the standard, and whether the product input shaft position degree meets the requirement or not can be directly judged; the hydraulic steering gear detection device does not need to use three-coordinate detection, is simple and convenient to use, does not need to carry the hydraulic steering gear assembly, can quickly perform 100% detection on products, and effectively controls the quality of the products.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts detection, in particular to a detection tool for a spline shaft. Background Art

[0002] In order to improve the product quality of automobiles, strict inspection of automobile parts is required during the production process. Among them, the input shaft spline of the hydraulic steering assembly is one of the key factors affecting the performance of the electro-hydraulic steering assembly. At present, the spline inspection is mainly carried out by three-coordinate measurement. Because the current mainstream electro-hydraulic steering assembly has a large cylinder diameter and is heavy, it is very inconvenient to use three-coordinate measurement, which consumes a lot of manpower and affects the efficiency of shaft component inspection. In addition, when using three-coordinate measurement to measure the input shaft spline, the ball head of the three-coordinate measuring instrument probe contacts the spline, which causes serious wear on the ball head and has a great impact on the service life of the probe. Utility Model Content

[0003] In order to solve the technical problems of many inconveniences in detecting splines through three-coordinate measurement, the utility model proposes a checking fixture for spline shafts, which can directly determine whether the position of the product input shaft meets the requirements without the need for three-coordinate measurement, and is simple and convenient to use.

[0004] The technical solution adopted by the utility model is as follows: a checking fixture for a spline shaft, comprising a handle, a connecting plate and a ring gauge, wherein the handle is arranged on one side of the connecting plate, the ring gauge is arranged on the other side of the connecting plate, the ring gauge is provided with a through hole, and the inner peripheral wall of the through hole is provided with an internal spline for cooperating with the external spline of the spline shaft.

[0005] Optionally, the cross-section of the ring gauge is circular, and the through hole, the ring gauge, and the handle are located on the same axis.

[0006] Optionally, the connecting plate includes a connecting circular plate and a connecting angle for connecting to the valve body, the handle is arranged on one side of the connecting circular plate, the ring gauge is arranged on the other side of the connecting circular plate, and there are multiple connecting angles, and the multiple connecting angles are arranged along the circumference of the connecting circular plate.

[0007] Optionally, the connection angle is provided with a plurality of screw holes for connecting with the end face of the valve body.

[0008] Optionally, the corners of the connecting angles are rounded.

[0009] Optionally, the nominal size value of the major diameter of the internal spline is φD2, the nominal size value of the middle diameter of the internal spline is φM2, and the nominal size value of the minor diameter of the internal spline is φd2.

[0010] φD2=φD2'+φA

[0011] φM2=φM2'+φA

[0012] φd2=φd2'+φA

[0013] Among them, φA is the spline position requirement of the spline shaft, φD2' is the nominal size value of the major diameter of the external spline, φM2' is the nominal size value of the middle diameter of the external spline, and φd2' is the nominal size value of the minor diameter of the external spline.

[0014] Optionally, the handle is cylindrical, square or T-shaped.

[0015] Optionally, a feeler gauge for detecting the gap between the connecting plate and the end face of the valve body is further included, wherein the thickness of the feeler gauge is 0.01-0.03 mm.

[0016] The beneficial effect of the present invention is that the user inserts the ring gauge into the valve body through the handle, so that the internal spline and the external spline are matched, and the connecting plate and the end face of the valve body are abutted against each other, and then a feeler gauge is used to detect whether there is a gap between the connecting plate and the end face of the valve body. If the feeler gauge cannot be inserted, it means that the spline position of the spline shaft meets the standard, and it can be directly judged whether the position of the product input shaft meets the requirements, and there is no need to use three-coordinate detection. It is simple and convenient to use, and there is no need to move the hydraulic steering gear assembly. The product can be quickly 100% inspected to effectively control product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a checking fixture for a spline shaft proposed in an embodiment of the present utility model;

[0018] Figure 2 A schematic structural diagram of a connecting plate of a spline shaft inspection fixture proposed in an embodiment of the present utility model;

[0019] Figure 3 A schematic diagram of the internal spline of a checking fixture for a spline shaft proposed in an embodiment of the present utility model;

[0020] Figure 4 A schematic diagram of the external spline of the spline shaft proposed in an embodiment of the present utility model;

[0021] Figure 5 A side view of a checking fixture for a spline shaft according to an embodiment of the present invention;

[0022] Figure 6 A cross-sectional view of the electro-hydraulic steering gear assembly mentioned in the background technology;

[0023] Figure 7 A schematic diagram of the valve body and external splines of the electro-hydraulic steering gear mentioned in the background art;

[0024] Figure 8This is a schematic diagram of the cooperation between the inspection fixture for the spline shaft and the valve body proposed in an embodiment of the present utility model.

[0025] The markings of each figure are: 1. handle; 2. connecting plate; 21. connecting angle; 3. ring gauge; 31. internal spline; 32. through hole; 4. valve body; 41. connecting protrusion; 5. spline shaft; 51. external spline. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below with reference to the accompanying drawings and examples.

[0027] like Figure 1-8 As shown, this embodiment discloses a gauge for a spline shaft, comprising a handle 1, a connecting plate 2, and a ring gauge 3. The handle 1 is arranged on one side of the connecting plate 2, and the ring gauge 3 is arranged on the other side of the connecting plate 2. The ring gauge 3 is provided with a through hole 32, and the inner circumferential wall of the through hole 32 is provided with an inner spline 31 for cooperating with the outer spline 51 of the spline shaft 5. The user inserts the ring gauge 3 into the valve body 4 through the handle 1, so that the inner spline 31 cooperates with the outer spline 51, and the end faces of the connecting plate 2 and the valve body 4 abut against each other. Then, a feeler gauge is used to detect whether there is a gap between the end faces of the connecting plate 2 and the valve body 4. If the feeler gauge cannot be inserted, it means that the spline position of the spline shaft 5 meets the standard. It can directly determine whether the position of the product input shaft meets the requirements without the need for three-coordinate detection. It is simple and convenient to use, does not require moving the hydraulic steering gear assembly, and can quickly conduct 100% inspection of the product, effectively controlling product quality.

[0028] like Figure 1 As shown, the cross section of the ring gauge 3 is circular, and the through hole 32, the ring gauge 3, and the handle 1 are located on the same axis. The through hole 32, the ring gauge 3, and the handle 1 are coaxially arranged, so that the internal spline 31 inside the through hole 32 and the external spline 51 can be easily matched when the handle 1 is pushed.

[0029] In this embodiment, if Figure 2-8 As shown, the connecting plate 2 includes a connecting circular plate and a connecting angle 21 for connecting to the valve body 4. The handle 1 is arranged on one side of the connecting circular plate, and the ring gauge 3 is arranged on the other side of the connecting circular plate. There are multiple connecting angles 21, and multiple connecting angles 21 are arranged along the circumference of the connecting circular plate. The valve body 4 is provided with connecting protrusions 41 along the circumference, and the connecting angles 21 are connected to the connecting protrusions 41 by screws. The connecting angles 21 are provided with multiple screw holes for connecting to the end face of the valve body 4. The connecting angles 21 are connected to the valve body 4 by screws. The corners of the connecting angles 21 are rounded. In this embodiment, there are three connecting angles 21, and the cross-section of the connecting plate 2 is triangular. The center distances L1, L2, and L3 of the three rounded corners are consistent with the center distances of the three mounting holes of the valve body 4, and the three rounded corners R1, R2, and R3 are consistent with the outer circle dimensions of the three mounting planes of the valve body 4.

[0030] like Figure 3 and 4 As shown, the nominal size value of the major diameter of the internal spline 31 is φD2, the nominal size value of the middle diameter of the internal spline 31 is φM2, and the nominal size value of the minor diameter of the internal spline 31 is φd2.

[0031] φD2=φD2'+φA

[0032] φM2=φM2'+φA

[0033] φd2=φd2'+φA

[0034] Where φA is the required position of the spline shaft 5, φD2' is the nominal major diameter of the external spline 51, φM2' is the nominal pitch diameter of the external spline 51, and φd2' is the nominal minor diameter of the external spline 51. The nominal outer diameter of the ring gauge 3, φD1, is consistent with the inner diameter of the valve body 4, φD1'. To ensure smooth entry of the spline ring gauge 3 into the valve body 4, a clearance fit is required. Therefore, the tolerance for the outer diameter of the spline ring gauge 3, φD1', can be set to (-0.01 / -0.03). The thickness of the ring gauge 3, H1, must be less than the distance, H1', ​​from the mounting surface of the valve body 4 to the upper cover.

[0035] like Figure 1 As shown, the handle 1 is cylindrical, square, or T-shaped. The handle 1 may also be other special-shaped structures. A feeler gauge is also included for detecting the gap between the connecting plate 2 and the end face of the valve body 4. The thickness of the feeler gauge is 0.01 to 0.03 mm. The thickness of the feeler gauge can be 0.01 mm, 0.02 mm, or 0.03 mm. In this embodiment, the thickness of the feeler gauge is 0.02 mm. If the feeler gauge is too thick, the accuracy of detecting the spline position of the spline shaft 5 is reduced. If the feeler gauge is too thin, its hardness is affected.

[0036] It is understandable that the specific embodiments described above are only used to explain the relevant utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts. Any equivalent structural transformation made using the contents of the description and drawings of this utility model, directly or indirectly used in other related technical fields, are also included in the protection scope of this utility model.

Claims

1. A checking fixture for a spline shaft, characterized in that: It includes a handle, a connecting plate and a ring gauge, wherein the handle is arranged on one side of the connecting plate, and the ring gauge is arranged on the other side of the connecting plate. The ring gauge is provided with a through hole, and the inner peripheral wall of the through hole is provided with an internal spline for cooperating with the external spline of the spline shaft.

2. The inspection tool for a spline shaft according to claim 1, characterized in that: The cross section of the ring gauge is circular, and the through hole, the ring gauge and the handle are located on the same axis.

3. The inspection tool for a spline shaft according to claim 1, characterized in that: The connecting plate includes a connecting circular plate and a connecting angle for connecting to the valve body. The handle is arranged on one side of the connecting circular plate, and the ring gauge is arranged on the other side of the connecting circular plate. There are multiple connecting angles, and the multiple connecting angles are arranged along the circumference of the connecting circular plate.

4. The inspection tool for a spline shaft according to claim 3, characterized in that: The connection angle is provided with a plurality of screw holes for connecting with the end surface of the valve body.

5. The inspection tool for a spline shaft according to claim 3, characterized in that: The corners of the connecting angles are rounded.

6. The inspection tool for a spline shaft according to claim 1, characterized in that: The nominal size of the major diameter of the internal spline is φD2, the nominal size of the middle diameter of the internal spline is φM2, and the nominal size of the minor diameter of the internal spline is φd2. φD2=φD2'+φA φM2=φM2'+φA φd2=φd2'+φA Among them, φA is the spline position requirement of the spline shaft, φD2' is the nominal size value of the major diameter of the external spline, φM2' is the nominal size value of the middle diameter of the external spline, and φd2' is the nominal size value of the minor diameter of the external spline.

7. The inspection tool for a spline shaft according to claim 1, characterized in that: The handle is in the shape of a cylinder, a square or a T-shaped structure.

8. The inspection tool for a spline shaft according to claim 1, characterized in that: It also includes a feeler gauge for detecting the gap between the connecting plate and the end face of the valve body, wherein the thickness of the feeler gauge is 0.01-0.03 mm.

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