Device and method for measuring center distance of two holes of helicopter transmission shaft

Abstract

The invention provides a device for measuring the center distance of two holes of a helicopter transmission shaft, and the device comprises an angle converter 1, a short target adapter 2, and a long target adapter 3, the angle converter 1 is an irregular entity, the working surface of the angle converter 1 is an MN surface and an AJ surface, the MN surface is parallel to the surface where a first installation platform is located, the AJ surface is parallel to the surface where a second installation platform is located, and an AK hole and an IJ hole are formed; the axis of the AK hole site is vertical to the first mounting platform, and the axis of the IJ hole site is vertical to the second mounting platform; the short target adapter 2 is composed of two sections of cylinders, the diameter of the small cylinder is consistent with the diameter of an AK hole in the angle converter 1, a hollow groove is formed in the large cylinder, and the diameter D of the groove is equal to the diameter D of the hollow groove in the long target adapter 3; the long target adapter 3 is composed of two sections of cylinders, the diameter of the small cylinder is consistent with the diameter of a CD hole site of the first installation platform, a hollow groove is formed in the large cylinder, and the diameter D of the groove is equal to the diameter D of the hollow groove in the short target adapter 2.

Description

Technical Field

[0001] The invention relates to the field of helicopter measurement, and in particular to a device and method for measuring the center distance between two holes of a helicopter transmission shaft. Background Art

[0002] At present, the holes on the transmission shaft mounting platform of some helicopters at home and abroad are all located on the jig. The holes belong to different components, and the planes where the holes are located are not parallel, resulting in the inability to directly measure the distance between the center lines of the two holes along the transmission shaft installation axis. The commonly used tape measure cannot be used for accurate measurement, and the error is large. Summary of the invention

[0003] The present application provides a device and method for measuring the center distance between two holes of a helicopter transmission shaft, which can effectively and directly determine whether the installation interface of the transmission shaft of the transmission system is correct.

[0004] In a first aspect, the present application provides a device for measuring the center distance between two holes of a helicopter transmission shaft, comprising an angle converter 1, a short target adapter 2, and a long target adapter 3, wherein:

[0005] The angle converter 1 is an irregular entity, and its working surfaces are the MN surface and the AJ surface. The MN surface is parallel to the surface where the first mounting platform is located, and the AJ surface is parallel to the surface where the second mounting platform is located. It is provided with an AK hole and an IJ hole. The axis of the AK hole is perpendicular to the first mounting platform, and the axis of the IJ hole is perpendicular to the second mounting platform.

[0006] The short target adapter 2 is composed of two sections of cylinders, the diameter of the small cylinder is consistent with the diameter of the AK hole in the angle converter 1, and there is a hollow groove in the large cylinder, and the diameter D of the groove is equal to the diameter D of the hollow groove in the long target adapter 3;

[0007] The long target adapter 3 is composed of two sections of cylinders, the diameter of the small cylinder is consistent with the diameter of the hole position CD of the first mounting platform, and there is a hollow groove in the large cylinder, and the diameter D of the groove is equal to the diameter D of the hollow groove in the short target adapter 2;

[0008] The angle converter 1 is fixed on the second mounting platform of the helicopter transmission shaft and is perpendicular to the second mounting platform of the helicopter transmission shaft;

[0009] The long target adapter 3 is perpendicular to the first mounting platform of the helicopter transmission shaft, and the center line of the hole on the first mounting platform of the helicopter transmission shaft is the BC line;

[0010] The short target adapter 2 is fixed on the angle converter 1, the center line AD of the short target adapter 2 is perpendicular to the first mounting platform of the helicopter transmission shaft, and the hole center line IJ of the short target adapter 2 is perpendicular to the second mounting platform of the helicopter transmission shaft.

[0011] Specifically, the angle converter 1 has two surfaces, namely, the MN surface and the AJ surface. The MN surface is parallel to the surface where the first mounting platform of the helicopter transmission shaft is located, and the AJ surface is parallel to the surface where the second mounting platform of the helicopter transmission shaft is located.

[0012] Specifically, the AK line on the angle converter 1 is perpendicular to the second mounting platform of the helicopter transmission shaft, and passes through the intersection of the first mounting platform of the helicopter transmission shaft and the second mounting platform of the helicopter transmission shaft.

[0013] Specifically, the IJ hole position on the angle converter 1 is used to fix the angle converter 1 on the first mounting platform of the helicopter transmission shaft, and the position of the IJ hole position can be determined according to the hole position on the first mounting platform of the helicopter transmission shaft.

[0014] Specifically, except for the MN surface and the AJ surface on the angle converter 1, other surfaces can be cut or polished according to actual conditions to avoid interference parts.

[0015] Specifically, one or a group of holes can be drilled at the AK hole position on the angle converter 1 according to the measurement requirements, and multiple groups of data can be measured for comparison.

[0016] Specifically, the length relationship between the short target adapter 2 and the long target adapter 3 is BC=AK+DK.

[0017] Specifically, the short target adapter 2 is perpendicular to the MN plane and is directly inserted into the AK hole in the angle converter 1 . The diameter of the small end cylinder of the short target adapter 2 is equal to the diameter of the AK hole in the angle converter 1 .

[0018] Specifically, the long target adapter 3 is perpendicular to the first mounting platform of the helicopter transmission shaft and is directly inserted into the BC hole of the first mounting platform of the helicopter transmission shaft. The diameter of the small end cylinder of the long target adapter 3 is equal to the diameter of the BC hole of the first mounting platform of the helicopter transmission shaft.

[0019] In a second aspect, the present application provides a method for measuring the center distance between two holes of a helicopter transmission shaft, the method comprising:

[0020] Step 1: The angle converter 1 is fixed on the second mounting platform of the helicopter transmission shaft;

[0021] Step 2: The small end cylinder in the short target adapter 2 is directly inserted into the AK hole in the angle converter 1;

[0022] Step 3: The small end cylinder in the long target adapter 3 is directly inserted into the BC hole of the second mounting platform of the helicopter transmission shaft;

[0023] Step 4: Measure the AB line segment using a laser tracker. Use the laser tracker target to directly place the ends of the long target adapter 3 and the short target adapter 2 for direct measurement.

[0024] Step 5: Measure the line segment AH, fix the angle converter 1 on the first mounting platform of the helicopter transmission shaft, and repeat steps 1 to 4;

[0025] Step 6: Use a laser tracker to measure the angle φ between the first mounting platform of the helicopter transmission shaft and the second mounting platform of the helicopter transmission shaft;

[0026] Step 7: Use the formula EF=AB+AH*COSφ to calculate the center distance EF between the two holes of the helicopter transmission shaft, that is, the distance between the hole center CD and the hole center GH along the axis.

[0027] The invention has the advantages of providing a device and method for measuring the center distance between two holes of a helicopter transmission shaft, which has a simple structure, a bidirectional long-distance accurate measurement device, and can effectively and directly determine whether the installation interface of the transmission shaft of the transmission system is correct. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a device for measuring the center distance between two holes of a helicopter transmission shaft provided by the present invention;

[0029] Figure 2 This is a top view of an angle converter 1 provided by the present invention;

[0030] Figure 3 is a schematic diagram of a short target adapter 2 provided by the present invention;

[0031] Figure 4 is a schematic diagram of a long target adapter 3 provided by the present invention;

[0032] Among them, 1-angle converter, 2-short target adapter, 3-long target adapter. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0034] Embodiment 1

[0035] like Figure 1-4 As shown, an embodiment of the present invention provides a device for measuring the center distance between two holes of a helicopter transmission shaft, comprising an angle converter 1, a short target adapter 2, and a long target adapter 3, wherein:

[0036] The angle converter 1 is an irregular entity, and its working surfaces are the MN surface and the AJ surface. The MN surface is parallel to the surface where the first mounting platform is located, and the AJ surface is parallel to the surface where the second mounting platform is located. It is provided with an AK hole and an IJ hole. The axis of the AK hole is perpendicular to the first mounting platform, and the axis of the IJ hole is perpendicular to the second mounting platform.

[0037] The short target adapter 2 is composed of two sections of cylinders, the diameter of the small cylinder is consistent with the diameter of the AK hole in the angle converter 1, and there is a hollow groove in the large cylinder, and the diameter D of the groove is equal to the diameter D of the hollow groove in the long target adapter 3;

[0038] The long target adapter 3 is composed of two sections of cylinders, the diameter of the small cylinder is consistent with the diameter of the hole position CD of the first mounting platform, and there is a hollow groove in the large cylinder, and the diameter D of the groove is equal to the diameter D of the hollow groove in the short target adapter 2;

[0039] The angle converter 1 is fixed on the second mounting platform of the helicopter transmission shaft and is perpendicular to the second mounting platform of the helicopter transmission shaft;

[0040] The long target adapter 3 is perpendicular to the first mounting platform of the helicopter transmission shaft, and the center line of the hole on the first mounting platform of the helicopter transmission shaft is the BC line;

[0041] The short target adapter 2 is fixed on the angle converter 1, the center line AD of the short target adapter 2 is perpendicular to the first mounting platform of the helicopter transmission shaft, and the hole center line IJ of the short target adapter 2 is perpendicular to the second mounting platform of the helicopter transmission shaft.

[0042] Preferably, the angle converter 1 has two surfaces, namely, the MN surface and the AJ surface. The MN surface is parallel to the surface where the first mounting platform of the helicopter transmission shaft is located, and the AJ surface is parallel to the surface where the second mounting platform of the helicopter transmission shaft is located.

[0043] Preferably, the AK line on the angle converter 1 is perpendicular to the second mounting platform of the helicopter transmission shaft, and passes through the intersection of the first mounting platform of the helicopter transmission shaft and the second mounting platform of the helicopter transmission shaft.

[0044] Preferably, the IJ hole on the angle converter 1 is used to fix the angle converter 1 on the first mounting platform of the helicopter transmission shaft, and the position of the IJ hole can be determined according to the hole position on the first mounting platform of the helicopter transmission shaft.

[0045] Preferably, except for the MN surface and the AJ surface on the angle converter 1, other surfaces can be cut or polished according to actual conditions to avoid interference parts.

[0046] Preferably, one or a group of holes can be drilled at the AK hole position on the angle converter 1 according to the measurement requirements, and multiple groups of data can be measured for comparison.

[0047] Preferably, the length relationship between the short target adapter 2 and the long target adapter 3 is BC=AK+DK.

[0048] Preferably, the short target adapter 2 is perpendicular to the MN plane and is directly inserted into the AK hole in the angle converter 1 , and the diameter of the small end cylinder of the short target adapter 2 is equal to the diameter of the AK hole in the angle converter 1 .

[0049] Preferably, the long target adapter 3 is perpendicular to the first mounting platform of the helicopter transmission shaft and is directly inserted into the hole BC of the first mounting platform of the helicopter transmission shaft. The diameter of the small end cylinder of the long target adapter 3 is equal to the diameter of the hole BC of the first mounting platform of the helicopter transmission shaft.

[0050] It should be noted that the distance between the hole center line BC and the hole center line GH along the axis includes the AB line segment and the AH part; the AB line segment is measured using a laser tracker, and the laser tracker target is directly placed on the ends of the long target adapter 3 and the short target adapter 2 for direct measurement; on the contrary, the angle converter 1 is fixed on the first mounting platform of the helicopter transmission shaft, and the AH part is measured using a laser tracker, and the laser tracker target is directly placed on the ends of the long target adapter 3 and the short target adapter 2 for direct measurement; after using the laser tracker to measure the angle φ between the first mounting platform of the helicopter transmission shaft and the second mounting platform of the helicopter transmission shaft, EF=AB+AH*COSφ, and the line segment EF is the center distance between the two holes of the helicopter transmission shaft, that is, the distance between the hole center CD and the hole center GH along the axis.

[0051] Embodiment 2

[0052] The embodiment of the present invention provides a method for measuring the distance between the centers of two holes of a helicopter transmission shaft using a measuring device, comprising:

[0053] Step 1: The angle converter 1 is fixed on the second mounting platform of the helicopter transmission shaft;

[0054] Step 2: The small end cylinder in the short target adapter 2 is directly inserted into the AK hole in the angle converter 1;

[0055] Step 3: The small end cylinder in the long target adapter 3 is directly inserted into the BC hole of the second mounting platform of the helicopter transmission shaft;

[0056] Step 4: Measure the AB line segment using a laser tracker. Use the laser tracker target to directly place the ends of the long target adapter 3 and the short target adapter 2 for direct measurement.

[0057] Step 5: Measure the line segment AH, fix the angle converter 1 on the first mounting platform of the helicopter transmission shaft, and repeat steps 1 to 4;

[0058] Step 6: Use a laser tracker to measure the angle φ between the first mounting platform of the helicopter transmission shaft and the second mounting platform of the helicopter transmission shaft;

[0059] Step 7: Use the formula EF=AB+AH*COSφ to calculate the center distance EF between the two holes of the helicopter transmission shaft, that is, the distance between the hole center CD and the hole center GH along the axis.

Claims

1. A device for measuring the center distance between two holes of a helicopter transmission shaft, characterized in that: It includes an angle converter 1, a short target adapter 2, and a long target adapter 3, wherein: The angle converter 1 is an irregular entity, and its working surfaces are the MN surface and the AJ surface. The MN surface is parallel to the surface where the first mounting platform is located, and the AJ surface is parallel to the surface where the second mounting platform is located. It is provided with an AK hole and an IJ hole. The axis of the AK hole is perpendicular to the first mounting platform, and the axis of the IJ hole is perpendicular to the second mounting platform. The short target adapter 2 is composed of two sections of cylinders, the diameter of the small cylinder is consistent with the diameter of the AK hole in the angle converter 1, and there is a hollow groove in the large cylinder, and the diameter D of the groove is equal to the diameter D of the hollow groove in the long target adapter 3; The long target adapter 3 is composed of two sections of cylinders, the diameter of the small cylinder is consistent with the diameter of the hole position CD of the first mounting platform, and there is a hollow groove in the large cylinder, and the diameter D of the groove is equal to the diameter D of the hollow groove in the short target adapter 2; The angle converter 1 is fixed on the second mounting platform of the helicopter transmission shaft and is perpendicular to the second mounting platform of the helicopter transmission shaft; The long target adapter 3 is perpendicular to the first mounting platform of the helicopter transmission shaft, and the center line of the hole on the first mounting platform of the helicopter transmission shaft is the BC line; The short target adapter 2 is fixed on the angle converter 1, the center line AD of the short target adapter 2 is perpendicular to the first mounting platform of the helicopter transmission shaft, and the hole center line IJ of the short target adapter 2 is perpendicular to the second mounting platform of the helicopter transmission shaft.

2. The measuring device according to claim 1, characterized in that The angle converter 1 has two surfaces, namely, the MN surface and the AJ surface. The MN surface is parallel to the surface where the first mounting platform of the helicopter transmission shaft is located, and the AJ surface is parallel to the surface where the second mounting platform of the helicopter transmission shaft is located.

3. The measuring device according to claim 1, characterized in that The AK line on the angle converter 1 is perpendicular to the second installation platform of the helicopter transmission shaft and passes through the intersection line of the first installation platform of the helicopter transmission shaft and the second installation platform of the helicopter transmission shaft.

4. The measuring device according to claim 1, characterized in that The IJ hole position on the angle converter 1 is used to fix the angle converter 1 on the first mounting platform of the helicopter transmission shaft, and the position of the IJ hole position can be determined according to the hole position on the first mounting platform of the helicopter transmission shaft.

5. The measuring device according to claim 1, characterized in that Except for the MN surface and the AJ surface on the angle converter 1, other surfaces can be cut or polished according to actual conditions to avoid interference parts.

6. The measuring device according to claim 1, characterized in that The AK hole position on the angle converter 1 can be drilled into one or a group of corresponding holes according to the measurement requirements, and multiple groups of data can be measured for comparison.

7. The measuring device according to claim 1, characterized in that The length relationship between the short target adapter 2 and the long target adapter 3 is BC=AK+DK.

8. The measuring device according to claim 1, characterized in that The short target adapter 2 is perpendicular to the MN plane and is directly inserted into the AK hole in the angle converter 1 . The diameter of the small end cylinder of the short target adapter 2 is equal to the diameter of the AK hole in the angle converter 1 .

9. The measuring device according to claim 1, characterized in that The long target adapter 3 is perpendicular to the first mounting platform of the helicopter transmission shaft and is directly inserted into the BC hole of the first mounting platform of the helicopter transmission shaft. The diameter of the small end cylinder of the long target adapter 3 is equal to the diameter of the BC hole of the first mounting platform of the helicopter transmission shaft.

10. A method for measuring the center distance between two holes of a helicopter transmission shaft, characterized in that the method include: Step 1: The angle converter 1 is fixed on the second mounting platform of the helicopter transmission shaft; Step 2: The small end cylinder in the short target adapter 2 is directly inserted into the AK hole in the angle converter 1; Step 3: The small end cylinder in the long target adapter 3 is directly inserted into the BC hole of the second mounting platform of the helicopter transmission shaft; Step 4: Measure the AB line segment using a laser tracker. Use the laser tracker target to directly place the ends of the long target adapter 3 and the short target adapter 2 for direct measurement. Step 5: Measure the line segment AH, fix the angle converter 1 on the first mounting platform of the helicopter transmission shaft, and repeat steps 1 to 4; Step 6: Use a laser tracker to measure the angle φ between the first mounting platform of the helicopter transmission shaft and the second mounting platform of the helicopter transmission shaft; Step 7: Use the formula EF=AB+AH*COSφ to calculate the center distance EF between the two holes of the helicopter transmission shaft, that is, the distance between the hole center CD and the hole center GH along the axis.

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