A device and method for measuring the distance between two holes of a helicopter transmission shaft

Abstract

The application provides a helicopter transmission shaft two-hole center distance measuring device, which comprises an angle converter 1, a short target adapter 2 and a long target adapter 3, wherein the angle converter 1 is an irregular solid, the working surface is an MN surface and an AJ surface, the MN surface is parallel to the surface of the first installation platform, the AJ surface is parallel to the surface of the second installation platform, an AK hole and an I J hole are arranged, the AK hole axis is perpendicular to the first installation platform, and the I J hole axis is perpendicular to the second installation platform; the short target adapter 2 is composed of two cylinders, the diameter of the small cylinder is consistent with the diameter of the AK hole in the angle converter 1, the large cylinder has a hollow groove, 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 cylinders, the diameter of the small cylinder is consistent with the diameter of the CD hole of the first installation platform, the large cylinder has a hollow groove, 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] This invention relates to the field of helicopter measurement, and specifically to a measuring device and method for measuring the center distance between two holes of a helicopter drive shaft. Background Technology

[0002] Currently, the holes on the mounting platform of a certain helicopter drive shaft, both domestically and internationally, are positioned on a frame. The holes belong to different components, and the planes on which the holes are located are not parallel. This makes it impossible to directly measure the distance between the center lines of two holes along the drive shaft mounting axis. Using a commonly used measuring tape is not accurate and results in a large error. Summary of the Invention

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

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

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

[0006] The short target adapter 2 consists of two cylindrical sections. The diameter of the smaller cylinder is the same as the diameter of the AK hole in the angle converter 1. The larger cylinder has a hollow groove with a diameter D equal to the diameter D of the hollow groove in the long target adapter 3.

[0007] The long target adapter 3 consists of two cylindrical sections. The diameter of the smaller cylinder is the same as the diameter of the CD hole on the first mounting platform. The larger cylinder has a hollow groove with a diameter D equal to the diameter D of the hollow groove in the short target adapter 2.

[0008] Angle converter 1 is fixed to the second mounting platform of the helicopter drive shaft and is perpendicular to the second mounting platform of the helicopter drive shaft.

[0009] The long target adapter 3 is a vertical helicopter drive shaft first mounting platform, and the center line of the hole on the helicopter drive shaft first mounting platform is line BC.

[0010] The short target adapter 2 is fixed on the angle converter 1. The center line AD of the short target adapter 2 is on the first mounting platform of the vertical helicopter drive shaft, and the center line IJ of the hole of the short target adapter 2 is on the second mounting platform of the vertical helicopter drive 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 drive shaft is located, and the AJ surface is parallel to the surface where the second mounting platform of the helicopter drive shaft is located.

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

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

[0014] Specifically, apart from the MN and AJ surfaces, the other surfaces on the angle converter 1 can be cut or polished according to the actual situation to avoid interference.

[0015] Specifically, the AK hole positions on the angle converter 1 can be drilled with one or a group of corresponding holes as needed for measurement, and multiple sets of data can be compared by measurement.

[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 surface and is directly inserted into the AK hole in the angle converter 1. The diameter of the small end cylinder in 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 mounted vertically on the first mounting platform of the helicopter drive shaft and is directly inserted into the BC hole of the first mounting platform of the helicopter drive shaft. The diameter of the small cylindrical part of the long target adapter 3 is equal to the diameter of the BC hole of the first mounting platform of the helicopter drive shaft.

[0019] The advantages of this invention are: it provides a measuring device and method for the center distance between two holes of a helicopter drive shaft, which has a simple structure, a bidirectional long-distance accurate measuring device, and can effectively and directly determine whether the drive shaft installation interface of the transmission system is correct. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a measuring device for the center distance between two holes of a helicopter drive shaft provided by the present invention;

[0021] Figure 2 This is a top view of an angle converter 1 provided by the present invention;

[0022] Figure 3 This is a schematic diagram of a short target adapter 2 provided by the present invention;

[0023] Figure 4 This is a schematic diagram of a long target adapter 3 provided by the present invention;

[0024] Among them, 1-angle converter, 2-short target adapter, 3-long target adapter. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Example 1

[0027] like Figure 1-4 As shown, this embodiment of the invention provides a measuring device for the center distance between two holes of a helicopter drive shaft, comprising an angle converter 1, a short target adapter 2, and a long target adapter 3, wherein:

[0028] Angle converter 1 is an irregular solid with working surfaces MN and AJ. MN is parallel to the surface of the first mounting platform, and AJ is parallel to the surface of the second mounting platform. It is provided with AK hole and IJ hole. The axis of AK hole is perpendicular to the first mounting platform, and the axis of IJ hole is perpendicular to the second mounting platform.

[0029] The short target adapter 2 consists of two cylindrical sections. The diameter of the smaller cylinder is the same as the diameter of the AK hole in the angle converter 1. The larger cylinder has a hollow groove with a diameter D equal to the diameter D of the hollow groove in the long target adapter 3.

[0030] The long target adapter 3 consists of two cylindrical sections. The diameter of the smaller cylinder is the same as the diameter of the CD hole on the first mounting platform. The larger cylinder has a hollow groove with a diameter D equal to the diameter D of the hollow groove in the short target adapter 2.

[0031] Angle converter 1 is fixed to the second mounting platform of the helicopter drive shaft and is perpendicular to the second mounting platform of the helicopter drive shaft.

[0032] The long target adapter 3 is a vertical helicopter drive shaft first mounting platform, and the center line of the hole on the helicopter drive shaft first mounting platform is line BC.

[0033] The short target adapter 2 is fixed on the angle converter 1. The center line AD of the short target adapter 2 is on the first mounting platform of the vertical helicopter drive shaft, and the center line IJ of the hole of the short target adapter 2 is on the second mounting platform of the vertical helicopter drive shaft.

[0034] 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 drive shaft is located, and the AJ surface is parallel to the surface where the second mounting platform of the helicopter drive shaft is located.

[0035] Preferably, the AK line on the angle converter 1 is perpendicular to the second mounting platform of the helicopter drive shaft, and passes through the intersection line of the first mounting platform and the second mounting platform of the helicopter drive shaft.

[0036] 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 drive shaft, and the position of the IJ hole can be determined according to the hole position on the first mounting platform of the helicopter drive shaft.

[0037] Preferably, apart from the MN and AJ surfaces, the other surfaces on the angle converter 1 can be cut or ground according to the actual situation to avoid interference.

[0038] Preferably, the AK hole positions on the angle converter 1 can be drilled with one or a group of corresponding holes as needed for measurement, and multiple sets of data can be compared by measurement.

[0039] Preferably, the length relationship between the short target adapter 2 and the long target adapter 3 is BC=AK+DK.

[0040] Preferably, the short target adapter 2 is perpendicular to the MN surface 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.

[0041] Preferably, the long target adapter 3 is perpendicular to the first mounting platform of the helicopter drive shaft and is directly inserted into the BC hole of the first mounting platform of the helicopter drive shaft. The diameter of the small cylindrical part of the long target adapter 3 is equal to the diameter of the BC hole of the first mounting platform of the helicopter drive shaft.

[0042] It should be noted that the distance between the hole centerline BC and the hole centerline GH along the axis includes the AB segment and the AH portion. The AB segment is measured using a laser tracker, with the laser tracker target placed directly at the ends of the long target adapter 3 and the short target adapter 2. Conversely, the angle converter 1 is fixed on the first mounting platform of the helicopter drive shaft. The AH portion is measured using a laser tracker, with the laser tracker target placed directly at the ends of the long target adapter 3 and the short target adapter 2. After measuring the angle φ between the first mounting platform and the second mounting platform of the helicopter drive shaft using a laser tracker, EF = AB + AH * COSφ, where the line segment EF is the distance between the centers of the two holes of the helicopter drive 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 two-hole center distance of a helicopter drive shaft, characterized in that, The angle converter 1, the short target adapter 2 and the long target adapter 3 are included, wherein: The angle converter 1 is an irregular solid, and the working surface is the MN surface and the AJ surface, the MN surface is parallel to the surface of the first mounting platform, the AJ surface is parallel to the surface of the second mounting platform, and the AK hole and the IJ hole are arranged, the AK hole axis is perpendicular to the first mounting platform, and the IJ hole axis is perpendicular to the second mounting platform; The short target adapter 2 is composed of two cylindrical bodies, the diameter of the small cylindrical body is consistent with the diameter of the AK hole in the angle converter 1, and the large cylindrical body has a hollow groove, 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 cylindrical bodies, the diameter of the small cylindrical body is consistent with the diameter of the BC hole in the first mounting platform, and the large cylindrical body has a hollow groove, 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 long target adapter 3 is directly inserted into the BC hole of the first mounting platform of the helicopter transmission shaft; The short target adapter 2 is fixed on the angle converter 1, and the center line AD of the short target adapter 2 is perpendicular to the first mounting platform of the helicopter transmission shaft.

2. A device for measuring the two-hole centre distance of a helicopter transmission shaft according to claim 1, characterised in that, The IJ hole of the angle converter 1 is used for fixing 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.

3. A device for measuring the two-hole centre distance of a helicopter transmission shaft according to claim 1, characterised in that, Except the MN surface and the AJ surface on the angle converter 1, other parts are cut or polished according to actual conditions to avoid interference.

4. A device for measuring the two-hole centre distance of a helicopter transmission shaft according to claim 1, characterised in that, The AK hole of the angle converter 1 is drilled with one or a group of hole positions according to measurement needs, and a plurality of groups of data are compared through measurement.

5. A device for measuring the two-hole centre distance of a helicopter transmission shaft according to claim 1, characterised in that, The length relationship between the short target adapter 2 and the long target adapter 3 is BC=AK+DK.

6. A device for measuring the two-hole centre distance of a helicopter transmission shaft according to claim 1, characterised in that, The short target adapter 2 is perpendicular to the MN surface and is directly inserted into the AK hole of the angle converter 1, and the diameter of the small end cylindrical body of the short target adapter 2 is equal to the diameter of the AK hole of the angle converter 1.

Images