Device for measuring whether hole is vertical or not

Abstract

The utility model provides a device for measuring whether a hole is vertical, which comprises a protractor, a pointer, a measuring shaft, a bearing and a support disc, the protractor is vertically arranged in the middle of the inner ring of the bearing, the pointer is rotatably connected to the circle center of the bearing, and the rotation direction of the pointer and the protractor are in the same plane; the measuring shaft is arranged at the lower end of the pointer and coincides with the axis of the pointer; the supporting disc is arranged on the bearing outer ring, and a plurality of supporting legs are arranged at the bottom of the supporting disc. According to the device for measuring whether the hole is vertical or not, the perpendicularity of the riveting hole can be rapidly measured, the deviation angle can be accurately displayed, the installation accuracy of aircraft parts can be improved, the riveting holes with different hole diameters can be measured by replacing the measuring shaft, and the application range is wide.

Description

Technical Field

[0001] The utility model belongs to the field of aircraft manufacturing equipment, and in particular relates to a device for measuring whether a hole is vertical. Background Art

[0002] Most of the parts on the aircraft fuselage, especially the skin, are fixed by rivets, so during the aircraft manufacturing process, thousands or even more rivet holes need to be made on various parts of the fuselage. When riveting, the verticality of the hole will have a direct impact on the quality of the riveting. If the hole is not guaranteed to be perpendicular to the riveting surface, it will cause the phenomenon of dimpling and warping when riveting, which will have a great impact on the quality of the riveting. At the current stage, after the rivet hole is made, when checking the verticality, it can only be measured by visual inspection or inserting an inspection rod to observe whether the surfaces are in contact with each other. This measurement method has low accuracy and is not intuitive enough. When the hole is not vertical but the deviation angle is small, it cannot be detected. Therefore, a device that can detect the verticality of the rivet hole is needed. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a device for measuring whether a hole is vertical, and the deviation angle of the riveting hole is indicated on the protractor by measuring the deflection of the shaft and the pointer.

[0004] A device for measuring whether a hole is vertical, including a protractor, a pointer, a measuring shaft, a bearing and a support plate. The protractor is vertically installed in the middle of the inner ring of the bearing, and then the pointer is rotatably connected to the center of the inner ring of the bearing, so that the protractor and the pointer can rotate with the inner ring of the bearing, and at the same time, the rotation direction of the pointer is in the same plane as the protractor, and the deflection angle of the pointer can be displayed on the protractor. The measuring shaft is set at the lower end of the pointer so that the measuring shaft and the axis of the pointer coincide, and the measuring shaft is used to insert into the riveted hole to measure the deviation angle. The support plate is set on the outer ring of the bearing, and a plurality of supporting feet are provided at the bottom of the support plate. The device can be attached to the surface of the measuring part through the supporting feet and the support plate during measurement.

[0005] In order to ensure that the support plate can adjust the angle with the surface of the measuring part during measurement, the support foot is set as a height-adjustable structure, a thread is provided on the outside of the support foot, and a matching screw hole is provided at the bottom of the support plate. The support foot is inserted into the screw hole through the thread, and the height can be adjusted by twisting the support foot.

[0006] In order to enable the device to measure riveted holes of different diameters, the measuring shaft is set to be replaceable, a threaded section is set at the top of the measuring shaft, and a threaded hole is set at the lower end of the pointer, so that the measuring shaft can be threaded into the threaded hole through the threaded section.

[0007] As one of the ways to connect the pointer, a rotating shaft is provided at the bottom of the pointer, and the two ends of the rotating shaft are rotatably connected to the inner ring of the bearing, so that the rotating shaft and the protractor are perpendicular in the horizontal direction, and the pointer can be rotated by the rotating shaft.

[0008] In order to maximize the measurement efficiency, the number of support feet is set to 3, which can not only fix the position of the support plate but also reduce the time spent on adjusting the support feet.

[0009] The device for measuring whether a hole is vertical provided by the utility model can quickly measure the verticality of the riveted hole, can accurately display the deviation angle, and improve the accuracy of aircraft component installation. By replacing the measuring axis, riveted holes with different apertures can be measured, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0011] Figure 1 It is a schematic diagram of the upper structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure below the utility model;

[0013] Figure 3 It is a cross-sectional schematic diagram of the assembly structure of the pointer and the measuring shaft;

[0014] Figure 4 This is a schematic diagram of the use state of the utility model;

[0015] As shown in the figure: 1 - protractor; 2 - pointer; 3 - measuring axis; 4 - bearing; 5 - support plate; 6 - support foot; 7 - rotating shaft. DETAILED DESCRIPTION

[0016] To further illustrate the concept of the present invention, the following will further illustrate the specific implementation of the present invention in conjunction with the accompanying drawings:

[0017] A device for measuring whether a hole is vertical, comprising a protractor 1, a pointer 2, a measuring shaft 3, a bearing 4 and a support plate 5. A flat long strip of pointer 2 is taken, a threaded hole is drilled on the bottom end face of the pointer 2, and then a metal shaft is taken as the measuring shaft 3, a threaded section is processed on the top of the measuring shaft 3, and the measuring shaft 3 and the pointer 2 are connected with threads, such as Figure 3As shown. Then vertically weld a shaft 7 to the bottom end of the pointer 2, connect the two ends of the shaft 7 to the inner ring of the bearing 4, and when setting the shaft 7, make the shaft 7 pass through the center of the bearing 4, and at the same time make the pointer 2 be located at the center of the inner ring of the bearing 4. Take a protractor 1, and vertically fix the protractor 1 on the inner ring of the bearing 4. When installing, make the protractor 1 close to the pointer 2, so that the pointer 2 can rotate on the surface of the protractor 1 around the center of the protractor 1. Take a metal disc, open a hole in the middle that is consistent with the outer diameter of the bearing 4, and then insert the bearing 4 into the hole and weld it to form a support disc 5. Open three screw holes on the ground circumference of the support disc 5, and then take three threaded columns as support feet 6, and connect the support feet 6 to the screw holes, as shown. Figure 1 , Figure 2 shown.

[0018] When in use, first insert the measuring shaft 3 into the riveted hole to be measured, then slowly move the entire device close to the surface of the riveted part. When the supporting foot 6 contacts the surface of the riveted part, turn the supporting foot 6 to adjust the height so that the supporting plate 5 remains parallel to the reference vertical plane. After adjustment, the deflection angle of the pointer 2 is the deviation angle of the riveted hole, and the value of the deviation angle can be read through the protractor 1, such as Figure 4 shown.

[0019] During the measurement process, since the measuring shaft 3 and the pointer 2 are coaxial, the deflection angle of the measuring shaft 3 is consistent with that of the pointer 2. Since the deflection direction of the riveting hole is not fixed, and since the bearing 4 can rotate, the measuring shaft 3 and the pointer 2 can drive the inner ring of the bearing 4 to rotate, thereby adjusting the angles of the protractor 1, the pointer 2 and the measuring shaft 3, so as to adapt to the deviation direction of the riveting hole. When it is necessary to measure riveting holes of different apertures, several measuring shafts 3 of different diameters are made, and the measurement work can be performed by replacing different measuring shafts 3 to meet the measurement needs in different situations.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various changes and variations are possible. Any modifications, equivalent substitutions, improvements, etc. made using the present invention should be included in the protection scope of the present invention.

Claims

1. A device for measuring whether a hole is vertical, characterized in that: The invention comprises a protractor (1), a pointer (2), a measuring shaft (3), a bearing (4) and a support plate (5), wherein the protractor (1) is vertically arranged at the middle of the inner ring of the bearing (4), the pointer (2) is rotatably connected to the center of the inner ring of the bearing (4), and the rotation direction of the pointer (2) is in the same plane as that of the protractor (1); the measuring shaft (3) is arranged at the lower end of the pointer (2), and the axes of the measuring shaft (3) and the pointer (2) coincide with each other; and the support plate (5) is arranged on the outer ring of the bearing (4), and a plurality of supporting feet (6) are provided at the bottom of the support plate (5).

2. The device for measuring whether a hole is vertical according to claim 1, characterized in that: The outer side of the support foot (6) is provided with a thread, and a matching screw hole is provided at the bottom of the support plate (5), and the support foot (6) is inserted into the screw hole.

3. The device for measuring whether a hole is vertical according to claim 1, characterized in that: The top of the measuring shaft (3) is provided with a threaded section, the lower end of the pointer (2) is provided with a threaded hole, and the threaded section is threadedly connected in the threaded hole.

4. The device for measuring whether a hole is vertical according to claim 2, characterized in that: A rotating shaft (7) is provided at the bottom of the pointer (2), and both ends of the rotating shaft (7) are rotatably connected to the inner ring of the bearing (4), respectively. The rotating shaft (7) is perpendicular to the protractor (1) in the horizontal direction.

5. The device for measuring whether a hole is vertical according to claim 3, characterized in that: The number of the supporting legs (6) is 3.

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