Auxiliary tool for installing and measuring light target

Abstract

The utility model discloses a light target installation and measurement auxiliary tool which comprises a light target installation disc, an opening circular ring is arranged on one side of the center position of the light target installation disc, a center bolt is arranged in the center position of the other face of the light target installation disc, and a light target is fixed to the end, located on the other face of the light target installation disc, of the center bolt. The auxiliary tool for measuring the center of the light target can ensure that the caliper body of the vernier caliper is parallel to the end face of the light target to be measured, can improve the measuring precision, reduces the measuring difficulty, and can ensure that the measuring precision is improved in the process of installing the light target in the tail shaft tube in the process of determining the theoretical center line of the shafting. The perpendicularity of the light target and the tail shaft tube shaft system is guaranteed; meanwhile, in the process that the vernier caliper measures the distance between the center circular hole of the light target and the inner circle of the tail shaft tube to determine the center of the tail shaft tube, the measurement precision of the vernier caliper can be improved, and the method is suitable for determining measurement data of the axis of the tail shaft tube in the process of determining the theoretical center line of the ship shafting through a wire drawing method and an irradiation method.

Description

Technical Field

[0001] The utility model belongs to the technical field of light target installation, and in particular relates to a light target installation measurement auxiliary tool. Background Art

[0002] In the process of determining the theoretical centerline of the ship's shafting, whether using the wire drawing method or the illumination method, it is necessary to install light targets in the front and rear inner holes of the stern tube; the stern tube center axis is determined by adjusting the center of the light target, and then the stern tube position is adjusted by adjusting the stern tube positioning screws on the herringbone frame. Through repeated adjustments, the laser beam passes through the cross centers of the front and rear light targets at the same time; that is, the stern tube center, the shafting and the determined theoretical centerline of the ship's shafting are coaxial. To ensure that the line connecting the cross centers of the front and rear light targets can be on the center axis of the stern tube after adjustment with the adjusting screws, when installing the light target, it is necessary to ensure that the end face of the light target and the stern tube axis are perpendicular (the end face of the light target and the end face of the stern tube are flush or parallel); the distance between the inner circle of the light target and the inner circle of the stern tube must be accurately measured with a vernier caliper. This auxiliary tool is used to solve the problem that the tail tube positioning is difficult due to the non-vertical installation of the light target and the large error caused by the non-parallelism of the ruler body and the plane of the light target when measuring the distance between the inner circle of the light target and the inner circle of the tail tube. The coaxiality of the tail tube axis system and the theoretical axis system does not meet the process technology requirements.

[0003] When determining the theoretical centerline of a ship's shafting, 1. The stern tube optical target is typically installed by manually pressing the end face of the optical target against the end face of the stern tube using a spirit level. The four fixing screws on the optical target's legs are then tightened to secure the optical target to the inner diameter of the stern tube. 2. When determining the center of the stern tube using a vernier caliper to measure the distance between the optical target's inner hole and the inner diameter of the stern tube, the traditional method is to visually ensure that the vernier caliper and the measured optical target end face are parallel to ensure measurement accuracy. This method requires a high level of technical skill from the measurer and cannot guarantee measurement accuracy.

[0004] The shortcomings of the existing technology: 1. When tightening the four leg screws, the light target itself will also move with the rotation of the screws. Although it is tightened by hand, it is difficult to ensure that the light target is perpendicular to the axis of the tail tube, which will lead to repeated installation and increase the workload of workers. Moreover, if the light target is not installed vertically, it will further affect the accuracy of determining the center of the tail tube by measuring the distance between the inner hole of the light target and the inner circle of the tail tube with a vernier caliper. The light target and the auxiliary tool are pressed flat by the center bolt of the light target installation auxiliary tool; then the auxiliary tool and the light target are fixed together on the end face of the tail tube by two tightening bolts; because there are two tightening bolts to fix the auxiliary tool and the light target together on the end face of the tail tube; when tightening the four leg adjustment bolts of the light target, the light target will not move with the rotation of the bolts. 2. Ensure that the vernier caliper body and the measured light target end face are parallel to ensure the accuracy of the measurement by visual inspection; this method requires a high level of technical skills of the measurer, and the measurement accuracy cannot be guaranteed. Utility Model Content

[0005] The purpose of the utility model is to provide an auxiliary tool for measuring light target installation, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a light target installation measurement auxiliary tool, comprising:

[0007] A light target mounting plate, wherein one side of the center position of the light target mounting plate is provided with an open circular ring with two side marking lines and a vernier caliper avoidance opening, a center bolt passing through a center hole is provided at the center position of the other side of the light target mounting plate, and a disc-shaped light target is fixed to the end of the center bolt located at the other side of the light target mounting plate, a tail shaft tube for measurement is provided on the outside of the light target, and clamping sleeves for locking the tail shaft tube by bolts are sleeved on both ends of the tail shaft tube, tightening screws for tightening the light target mounting plate at one end of the tail shaft tube are relatively penetrated on both sides of the light target mounting plate, light target legs are evenly threaded on the outer side of the light target to position the top of the light target inside one end of the tail shaft tube, and a light target center adjustment bolt for adjusting the center position of the light target in the tail shaft tube is provided between the light target legs.

[0008] Preferably, the open ring is fixed between the light target mounting plate and the light target by a central bolt, and the bottoms of the clamping sleeves at both ends of the tail shaft tube are provided with herringbone support frames, which can be used to avoid the vernier caliper auxiliary ruler or display screen.

[0009] Preferably, one end of the tightening screw at both ends of the optical target mounting plate is bent to provide a tightening hook, and the tightening hook is buckled on both sides of the clamping sleeve to tighten and fix the optical target mounting plate on the tail shaft tube, thereby tightening the optical target mounting plate to one end of the tail shaft tube.

[0010] Preferably, a central circular hole of the light target is provided at the center of the light target for passing a central bolt through the light target mounting plate to fix the light target mounting plate, so that the center assembly between the light target mounting plate and the light target is fixed.

[0011] Preferably, one end of the central circular hole of the light target is protruding outward and provided with an axial sleeve, and the open ring is sleeved on the outside of the axial sleeve and assembled with the light target to achieve a combined connection between the open ring and the light target.

[0012] Preferably, one end of the optical target leg is a threaded locking portion, and the optical target leg is threadedly fixed to the outside of the optical target through the threaded locking portion, thereby achieving central position adjustment and central axial support of the optical target in the inner ring of the tail shaft tube.

[0013] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the light target installation measurement auxiliary tool is a measurement auxiliary tool composed of a light target installation plate, an open ring, a center bolt, a light target, a stern tube, a clamping sleeve, a tightening screw, a light target leg, a light target center adjustment bolt, a tightening hook, and a light target center circular hole. The light target center measurement auxiliary tool can ensure that the vernier caliper body is parallel to the measured light target end face, which can improve measurement accuracy and reduce measurement difficulty. In addition, during the process of determining the theoretical center line of the shaft system and installing the light target in the stern tube, the verticality of the light target and the stern tube shaft system can be guaranteed; at the same time, during the process of measuring the distance between the center circular hole of the light target and the inner circle of the stern tube to determine the center of the stern tube with the vernier caliper, the accuracy of the vernier caliper measurement can be increased. It is also suitable for determining the measurement data of the stern tube axis in the process of determining the theoretical center line of the ship shaft system by the wire drawing method and the illumination method. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the light target mounting plate of the utility model;

[0015] Figure 2 This is a schematic diagram of the light target structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the open ring structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the light target mounting plate and the light target assembly of the utility model;

[0018] Figure 5 This is a schematic diagram of the combined structure of the light target, tail tube and open ring of the utility model;

[0019] Figure 6 This is a schematic diagram of the combined installation structure of the tail shaft tube, the clamping sleeve and the light target mounting plate of the utility model.

[0020] In the figure: 1. Light target mounting plate; 2. Open ring; 3. Center bolt; 4. Light target; 5. Tail shaft tube; 6. Clamping sleeve; 7. Tensioning screw; 8. Light target leg; 9. Light target center adjustment bolt; 10. Tensioning hook; 11. Light target center hole; 12. Axis sleeve; 13. Herringbone support frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-6 The utility model provides a technical solution: a light target installation measurement auxiliary tool, comprising:

[0023] A light target mounting plate 1 is provided with an open circular ring 2 with two side marking lines and a vernier caliper avoidance opening on one side of the center position of the light target mounting plate 1. The inner diameter of the open circular ring 2 is slightly about the outer diameter of the center circle of the light target bull's eye (the opening is used to avoid the vernier caliper auxiliary ruler or display screen). The two end faces of the open circular ring 2 are precisely processed to ensure the accuracy of the precision. A center bolt 3 passing through the center hole is provided at the center position of the other side of the light target mounting plate 1, which is convenient for the connection and fixation with the light target 4 to determine the center position of the light target 4 in the tail shaft tube 5, and the center bolt 3 is located at one end of the other side of the light target mounting plate 1 to fix a disc-shaped light target 4. The center axis system of the tail shaft tube 5 is determined by adjusting the center of the light target 4. A tail shaft tube 5 for measurement is provided on the outside of the light target 4. The tail shaft tube 5 is used to measure the light target 4. The central axis of the shaft tube 5 is determined, and the two ends of the tail shaft tube 5 are sleeved with a clamping sleeve 6 for locking the tail shaft tube 5 by bolts, so that the tail shaft tube 5 is locked to the clamping sleeve 6 by screws, and the two sides of the light target mounting plate 1 are relatively penetrated by a tightening screw 7 for tightening the light target mounting plate 1 at one end of the tail shaft tube 5, so that the center of the light target mounting plate 1 is tightened at one end of the tail shaft tube 5 to determine the central axis system, and the outer surface of the light target 4 is evenly threaded with light target legs 8 that position the top of the light target inside one end of the tail shaft tube 5, which plays a role in supporting and positioning the light target 4 in the center position of the tail shaft tube 5, and a light target center adjustment bolt 9 for adjusting and measuring the center position of the light target in the tail shaft tube 5 is provided between the light target legs 8, which can adjust the center accuracy of the light target 4 in the tail shaft tube 5.

[0024] The open ring 2 is fixed between the light target mounting plate 1 and the light target 4 by a central bolt 3. The auxiliary ruler of the vernier caliper or the display screen of the digital vernier caliper is aligned with the ring opening so that the vernier caliper ruler body and the end face of the ring are in contact with each other and aligned with the marking line in the vertical or horizontal direction on the ring. The bottom of the clamping sleeve 6 at both ends of the tail shaft tube 5 is provided with a herringbone support frame 13 to provide a stable horizontal support for the tail shaft tube 5. One end of the tensioning screw 7 at both ends of the light target mounting plate 1 is bent and provided with a tensioning hook 10, which can be used to tighten and fix the light target mounting plate 1 using the tensioning hook 10 , and the tightening hooks 10 are buckled on both sides of the clamping sleeve 6 to tighten and fix the light target mounting plate 1 on the tail shaft tube 5. The center position of the light target 4 is provided with a light target center circular hole 11 for passing the center bolt 3 through the light target mounting plate 1 to fix it, so as to facilitate the measurement and determination of the axis center of the tail shaft tube 5. One end of the light target center circular hole 11 protrudes outward and is provided with an axial sleeve 12. The open ring 2 is sleeved on the outside of the axial sleeve 12 and is assembled with the light target 4. One end of the light target leg 8 is a threaded locking part, and the light target leg 8 is threadedly fixed to the outside of the light target 4 through the threaded locking part.

[0025] Specifically, when in use, the assembled light target 4 is fixed with the center circular hole 11 of the light target in the center of the light target 4 by adjusting the four light target center adjusting bolts 9 on the light target 4, and the light target 4 and the light target mounting plate 1 are fixed together by the center bolt 3, and the two ends of the tail shaft tube 5 are inserted into the axis sleeve 12 and locked and fixed with bolts, and one end of the two tightening screws 7 with tightening hooks 10 is hung on the axis sleeve 12 and the inner rings on both sides. At the same time, the threaded end of the tightening screw 7 passes through the screw holes provided on both sides of the outer circle of the light target mounting plate 1, and the light target mounting plate 1 and the light target 4 are fixed to the end face of the tail shaft tube 5 together by tightening the ingot screws, and then the four light targets 4 are fixed through the four openings on the light target mounting plate 1. Unscrew and tighten the target legs 8, install the optical target 4 on the inner circle of the tail shaft tube 5, remove the auxiliary installation tool, use a spirit level to check whether the end face of the optical target 4 is flush with the end face of the tail shaft tube 5, put the optical target measurement auxiliary tool on the protruding part of the axis sleeve 12 of the central circular hole 11 of the optical target, and make the end face of the ring close to the end face of the optical target 4, align the cross mark line on the open circular ring 2 with the cross mark line made on the end face of the tail shaft tube 5, align the auxiliary ruler of the vernier caliper or the display screen of the digital vernier caliper with the opening of the open circular ring 2, so that the vernier caliper body and the end face of the open circular ring 2 are in contact with each other and aligned with the mark lines on the open circular ring 2 in the vertical or horizontal direction; this is used to ensure that the vernier caliper body and the end face of the optical target 4 are parallel. The vertical and horizontal directions of the measuring area are such that the left and right measurement values in the horizontal direction are equal and the upper and lower distances in the vertical direction are equal, that is, the center of the central circular hole 11 of the light target is concentric with the tail shaft tube 5; a cross bull's eye can be placed in the inner hole of the tail shaft tube 5 for illumination or wire pulling.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A light target installation measurement auxiliary tool, characterized in that: include: A light target mounting plate (1) is provided with an open circular ring (2) with two side marking lines and a vernier caliper avoidance opening at one side of the center position of the light target mounting plate (1), a center bolt (3) passing through a center hole is provided at the center position of the other side of the light target mounting plate (1), and a disk-shaped light target (4) is fixed at one end of the center bolt (3) located on the other side of the light target mounting plate (1), a tail shaft tube (5) for measurement is provided outside the light target (4), and both ends of the tail shaft tube (5) are sleeved with A clamping sleeve (6) is used to lock the tail tube (5) by means of bolts. Tightening screws (7) are provided on both sides of the light target mounting plate (1) to tighten the light target mounting plate (1) on one end of the tail tube (5). Light target legs (8) are evenly threadedly installed on the outer side of the light target (4) to position the top of the light target inside one end of the tail tube (5). Light target center adjustment bolts (9) are provided between the light target legs (8) to adjust and measure the center position of the light target in the tail tube (5).

2. The optical target installation measurement auxiliary tool according to claim 1, characterized in that: The open ring (2) is fixed between the light target mounting plate (1) and the light target (4) via a central bolt (3), and the bottoms of the clamping sleeves (6) at both ends of the tail shaft tube (5) are both provided with herringbone support frames (13).

3. The optical target installation measurement auxiliary tool according to claim 1, characterized in that: One end of the tightening screw rod (7) at both ends of the optical target mounting plate (1) is bent to provide a tightening hook (10), and the tightening hook (10) is buckled on both sides of the clamping sleeve (6) to tighten and fix the optical target mounting plate (1) on the tail shaft tube (5).

4. The optical target installation measurement auxiliary tool according to claim 1, characterized in that: A light target center circular hole (11) is provided at the center of the light target (4) for allowing a center bolt (3) to pass through to fix the light target mounting plate (1).

5. The optical target installation measurement auxiliary tool according to claim 4, characterized in that: One end of the central circular hole (11) of the light target is protruding outward and is provided with an axial sleeve (12); the open circular ring (2) is sleeved on the outside of the axial sleeve (12) and assembled with the light target (4).

6. The optical target installation measurement auxiliary tool according to claim 1, characterized in that: One end of the light target leg (8) is a threaded locking portion, and the light target leg (8) is threadedly fixed to the outside of the light target (4) through the threaded locking portion.

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