An assembly method for ensuring the interchangeability of a bearing compass

Abstract

The application discloses an assembling method for ensuring the interchangeability of azimuth repeaters, which determines the connecting line of the supporting shafts on the two sides of the azimuth repeater by locking the position of the azimuth repeater support, and determines the central axis of the azimuth repeater by the method of observing the broadside angle of a remote target by an optical azimuth instrument, so that the consistency of the theta angle of each azimuth repeater can be ensured without machining high-precision pin holes, thereby reducing the machining and assembling cost of the azimuth repeater; and the broadside angle of a remote target can be directly observed and read during the assembling of the azimuth repeater, so that the situation of poor interchangeability caused by the difficulty in accurately controlling the assembling gap is avoided.

Description

Technical Field

[0001] This invention relates to the field of ship navigation technology, and in particular to an assembly method that ensures the interchangeability of compassemblies. Background Technology

[0002] A compass is typically installed on both sides of a ship to indicate its course. When used in conjunction with an optical compass or azimuth ring, it can measure the bearing of celestial bodies or the bearing and angle of distant objects.

[0003] In actual installation, the azimuth compass is mounted on a bracket via support shafts on both sides, and the bracket is fixed to the decks on both port and starboard sides. During installation, the 0-180° line connecting the angle rings of the azimuth compass (which can be considered the centerline of the azimuth compass, the same below) is calibrated to be parallel to the bow and stern lines of the ship using a specific method. After installation, the parallelism between the centerline of the azimuth compass and the bow and stern lines of the ship is generally not recalibrated.

[0004] The structure of a azimuth compass can be roughly divided into the main hull component and the top cover component. Support shafts are installed on the left and right sides of the main hull component, and the centerline can be drawn from the angle ring of the top cover component. Let θ be the angle between the line connecting the two support shafts and the centerline (the same applies below). During the assembly of the azimuth compass, when installing the top cover component onto the main hull component, to ensure the interchangeability of each azimuth compass, the angle θ of each azimuth compass must be consistent. Otherwise, when the azimuth compass is replaced for maintenance or other reasons, because the line connecting the two support shafts is not on the same plane as the centerline, if there are assembly deviations in the main hull component and the top cover component of the replaced azimuth compass, the centerline will no longer be parallel to the bow and stern lines of the ship, resulting in errors in the measured azimuth and angle of celestial bodies or landmarks.

[0005] Currently, in order to ensure the interchangeability of different azimuth compasses, two or more locating pins are generally used to ensure the consistency of the θ angle. The tolerance accuracy requirements for the shape and position of the pin holes are very high, which increases the manufacturing cost of the azimuth compasses. Summary of the Invention

[0006] In view of this, the present invention provides an assembly method that ensures the interchangeability of azimuth compasses. It can ensure the consistency of the θ angle of each azimuth compasses without the need to process high-precision pin holes, thus ensuring the assembly accuracy of each azimuth compasses and reducing the processing and assembly costs of azimuth compasses.

[0007] An assembly method that ensures the interchangeability of azimuth compasses specifically includes the following steps:

[0008] S1, place the compass bracket at any point A on the ground, install the standard azimuth compass onto the compass bracket, and install the optical azimuth instrument at the center of the standard azimuth compass;

[0009] S2, rotate the optical compass and the compass bracket so that the line in the eyepiece of the optical compass is always aligned with the target B at any fixed position in the distance. Then, align the bottom line of the optical compass with a certain scale value X of the hull angle ring of the standard compass. At this time, lock the position of the compass bracket and keep the angle α between the line connecting the two support shafts of the compass and the AB line fixed.

[0010] S3, remove the standard compass from the compass holder;

[0011] S4. Fix the azimuth sub-compass to be assembled onto the sub-compass bracket. The upper cover of the azimuth sub-compass to be assembled is not fastened to the main housing component. Then install the optical azimuth instrument at the center of the azimuth sub-compass to be assembled.

[0012] S5, rotate the upper cover of the optical compass and the compass to be assembled, so that the line in the eyepiece of the optical compass is aligned with the target B, and the bottom line of the optical compass is aligned with the scale value X of the hull angle ring. At this time, lock the upper cover of the compass to be assembled to the main body of the housing. The angle K between the central axis of the compass and the AB line remains unchanged, thereby ensuring that the angle θ between the central axis of the compass and the line connecting the two support shafts on both sides of the compass remains unchanged.

[0013] Preferably, the specific steps for rotating the optical azimuth instrument and the compass support in step S2 are as follows:

[0014] Rotate the optical compass so that the line in its eyepiece is aligned with a fixed target B in the distance. At this time, observe whether the bottom graduation line of the optical compass is aligned with a certain graduation value X of the angle ring of the standard compass. If it is not aligned, rotate the compass bracket. The compass bracket will rotate synchronously with the standard compass until the bottom graduation line of the optical compass is aligned with the graduation value X of the angle ring of the standard compass. During the rotation of the compass bracket, the line in the eyepiece of the optical compass is always aligned with the target B.

[0015] Preferably, target B is a tower spire or a lamppost.

[0016] Preferably, the specific steps in step S4 of fixing the compass to be assembled onto the compass bracket are as follows:

[0017] Fix the main housing component of the compass to be assembled onto the compass bracket, then install the upper cover component of the compass to be assembled onto the main housing component. Screw on several screws at the fixed connection between the upper cover component and the main housing component, but do not tighten the screws yet.

[0018] Preferably, the specific steps for rotating the optical compass and the upper cover component of the compass to be assembled in step S5 are as follows:

[0019] Rotate the optical compass so that the line in its eyepiece is aligned with target B. At this time, observe whether the bottom line of the optical compass is aligned with the scale value X of the angle ring. If it is not aligned, rotate the top cover of the compass to be assembled until the bottom line of the optical compass is aligned with the scale value X of the angle ring. During the rotation of the top cover, the line in the eyepiece of the optical compass should always be aligned with target B.

[0020] Preferably, the included angles α, K, and θ have the following relationship: α + K + θ = 180° or α - K + θ = 180°.

[0021] The beneficial effects of this invention are:

[0022] 1. This invention determines the line connecting the two support shafts of the azimuth compass by locking the position of the azimuth compass bracket, and determines the centerline of the azimuth compass by observing the hull angle of a distant target using an optical azimuth instrument. This eliminates the need to process high-precision pin holes, thus ensuring the consistency of the θ angle of each azimuth compass and reducing the processing and assembly costs of the azimuth compass.

[0023] 2. During the assembly of the compass, the hull angle of distant targets can be directly observed, avoiding poor interchangeability caused by the difficulty in accurately controlling the assembly gap, thereby reducing the number of reworks and improving production efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of a compass.

[0026] Figure 2 This is the front view of a compass.

[0027] Figure 3 This is a top view of a compass.

[0028] Figure 4 This is a schematic diagram illustrating the principle of selecting a fixed target B in front of the right side of the compass.

[0029] Figure 5 This is a schematic diagram illustrating the principle of selecting a fixed target B in the left front of the compass.

[0030] The meanings of the labels in the diagram are as follows:

[0031] 1 is the azimuth compass, 2 is the top cover component, 3 is the main shell component, 4 is the support shaft, 5 is the line connecting the support shafts on both sides of the compass, 6 is the centerline of the compass, and 7 is the hull angle ring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0033] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0034] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0035] This invention provides an assembly method that ensures the interchangeability of azimuth compasses, specifically including the following steps:

[0036] S1. Place the compass bracket at any point A on the ground, install the standard compass onto the compass bracket, and install the optical compass at the center of the standard compass.

[0037] A standard azimuth compass refers to an azimuth compass whose installation accuracy meets the requirements.

[0038] S2. Select a fixed target B at any distant location. Target B can be a tower spire or a lamppost. Then, rotate the optical compass so that the reticle in its eyepiece aligns with target B. At this time, observe whether the bottom graduation line of the optical compass aligns with a certain scale value X (i.e., angle) on the hull of the standard compass. If not aligned, rotate the compass bracket, which will rotate synchronously with the standard compass, until the bottom graduation line of the optical compass aligns with the scale value X on the hull of the standard compass. During the rotation of the compass bracket, the reticle in the eyepiece of the optical compass... The line is always aligned with target B; when the bottom graduation line of the optical compass is aligned with the graduation value X of the azimuth ring of the standard compass, the position of the compass bracket is locked (once the position of the compass bracket is locked, it cannot be moved or rotated). That is, the azimuth of the fixing point of the main housing component used to fix the compass on the compass bracket is locked. In this way, after the compass is installed on the compass bracket, the azimuth of the line connecting the two support shafts of the compass is locked. Thus, when assembling any azimuth compass in the future, the angle α between the line 5 connecting the two support shafts of the compass and line AB will remain fixed.

[0039] S3, remove the standard compass from the compass holder.

[0040] S4. When fixing the azimuth subcompass to be assembled, first fix the main housing component 3 of the azimuth subcompass to be assembled onto the subcompass bracket, then install the upper cover component 2 of the azimuth subcompass to be assembled onto the main housing component 3, and screw multiple screws at the fixed connection between the upper cover component 2 and the main housing component 3, but do not tighten the screws for the time being.

[0041] S5, rotate the optical compass so that the line in its eyepiece is aligned with target B. At this time, observe whether the bottom line of the optical compass is aligned with the scale value X of the angle ring. If it is not aligned, rotate the upper cover part 2 of the compass to be assembled until the bottom line of the optical compass is aligned with the scale value X of the angle ring. During the rotation of the upper cover part, the line in the eyepiece of the optical compass is always aligned with target B. At this time, tighten the screws of the upper cover part 2 of the compass to be assembled and the main body part 3 of the housing. The angle K between the central axis 6 of the compass and the AB line remains unchanged.

[0042] Any compass to be assembled shall be installed according to the above steps S4 and 5. After the angle α between the line 5 connecting the two support shafts of the compass and the AB line, and the angle K between the central axis 6 of the compass and the AB line are fixed, the angle θ between the central axis 6 of the compass and the line 5 connecting the two support shafts of the compass will be fixed.

[0043] The following relationship exists between the included angles α, K, and θ: α + K + θ = 180° or α - K + θ = 180°.

[0044] like Figure 4 As shown, the center point of the azimuth compass is point A. Assuming target B is selected to the right front of the azimuth compass, the angle between the line connecting the two support shafts of the compass and the straight line AB is α, the angle between the central axis of the compass and line AB is K, and the angle between the line connecting the two support shafts of the compass and the central axis of the compass is θ. Then α + K + θ = 180°. When installing any azimuth compass, when the orientation of the fixing point of the main housing component used to fix the compass on the compass bracket is fixed, and the main housing component 3 of the azimuth compass is fixed to the compass bracket, α is a fixed value. Then, as long as K is kept fixed, the angle θ of different azimuth compasses will necessarily be consistent.

[0045] like Figure 5 As shown, the center point of the azimuth compass is point A. Assuming target B is selected to the left front of the azimuth compass, the angle between the line connecting the two support shafts of the compass and the straight line AB is α, the angle between the central axis of the compass and line AB is K, and the angle between the line connecting the two support shafts of the compass and the central axis of the compass is θ. Then α-K+θ=180°. When installing any azimuth compass, when the orientation of the fixing point of the main housing component of the azimuth compass on the compass bracket is fixed, and the main housing component 3 of the azimuth compass is fixed to the compass bracket, α is a fixed value. Then, as long as K is kept fixed, the angle θ of different azimuth compasses will necessarily be consistent.

[0046] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. An assembly method for ensuring the interchangeability of azimuth compasses, characterized in that, Specifically, the following steps are included: S1, place the compass bracket at any point A on the ground, install the standard azimuth compass onto the compass bracket, and install the optical azimuth instrument at the center of the standard azimuth compass; S2, rotate the optical compass and the compass bracket so that the line in the eyepiece of the optical compass is always aligned with the target B at any fixed position in the distance. Then, align the bottom line of the optical compass with a certain scale value X of the hull angle ring of the standard compass. At this time, lock the position of the compass bracket and keep the angle α between the line connecting the two support shafts of the compass and the AB line fixed. S3, remove the standard compass from the compass holder; S4. Fix the azimuth sub-compass to be assembled onto the sub-compass bracket. The upper cover of the azimuth sub-compass to be assembled is not fastened to the main housing component. Then install the optical azimuth instrument at the center of the azimuth sub-compass to be assembled. S5, rotate the upper cover of the optical compass and the compass to be assembled, so that the line in the eyepiece of the optical compass is aligned with the target B, and the bottom line of the optical compass is aligned with the scale value X of the hull angle ring. At this time, lock the upper cover of the compass to be assembled to the main body of the housing. The angle K between the central axis of the compass and the AB line remains unchanged, thereby ensuring that the angle θ between the central axis of the compass and the line connecting the two support shafts on both sides of the compass remains unchanged.

2. The assembly method for ensuring the interchangeability of azimuth compasses according to claim 1, characterized in that, The specific steps for rotating the optical compass and the compass bracket in step S2 are as follows: Rotate the optical compass so that the line in its eyepiece is aligned with a fixed target B in the distance. At this time, observe whether the bottom graduation line of the optical compass is aligned with a certain graduation value X of the angle ring of the standard compass. If it is not aligned, rotate the compass bracket. The compass bracket will rotate synchronously with the standard compass until the bottom graduation line of the optical compass is aligned with the graduation value X of the angle ring of the standard compass. During the rotation of the compass bracket, the line in the eyepiece of the optical compass is always aligned with the target B.

3. The assembly method for ensuring the interchangeability of azimuth compasses according to claim 1 or 2, characterized in that, The target B is a tower spire or a lamppost.

4. The assembly method for ensuring the interchangeability of azimuth compasses according to claim 1, characterized in that, The specific steps for fixing the compass to be assembled onto the compass bracket in step S4 are as follows: Fix the main housing component of the compass to be assembled onto the compass bracket, then install the upper cover component of the compass to be assembled onto the main housing component. Screw on several screws at the fixed connection between the upper cover component and the main housing component, but do not tighten the screws yet.

5. The assembly method for ensuring the interchangeability of azimuth compasses according to claim 1, characterized in that, The specific steps for rotating the optical compass and the upper cover of the compass to be assembled in step S5 are as follows: Rotate the optical compass so that the line in its eyepiece is aligned with target B. At this time, observe whether the bottom line of the optical compass is aligned with the scale value X of the angle ring. If it is not aligned, rotate the top cover of the compass to be assembled until the bottom line of the optical compass is aligned with the scale value X of the angle ring. During the rotation of the top cover, the line in the eyepiece of the optical compass should always be aligned with target B.

6. The assembly method for ensuring the interchangeability of azimuth compasses according to claim 1, characterized in that, The following relationship exists between the included angles α, K, and θ: α+K+θ=180° or α-K+θ=180°.

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