Flow guide cover mounting device with stern tube and rudderstock of ship as positioning reference

Abstract

The invention discloses a fairing mounting device with a stern tube and a rudderstock of a ship as positioning references, which is characterized in that the device comprises a measuring vehicle, hydraulic support legs (1) are arranged at four corners of the measuring vehicle, a base unit is further arranged on the measuring vehicle, a positioning frame unit is connected onto the base unit through a turnover mechanism, and the positioning frame unit is connected with the measuring vehicle. The positioning frame unit is provided with an infrared positioning device, and the front end and the rear end of the measuring vehicle are respectively provided with a steel wire tensioning device. According to the positioning and mounting device, the mounting precision among the propeller shaft, the rudder shaft and the fairing can be improved, the mounting difficulty can be effectively reduced, damage to a ship structure and a shaft system in the mounting process is reduced, and therefore the ship building quality and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the field of installation of ship components, in particular to a fairing installation device which takes a ship's stern tube and a rudder stock as positioning references. Background Art

[0002] In the field of shipbuilding, the positioning and installation process of the ship's stern tube and rudder stock is very critical. It can be said that it plays a decisive role in the overall performance of the ship and the reliability of subsequent operations.

[0003] During installation, the centerline of the stern tube must be precisely aligned with the theoretical centerline. However, in practice, the complex environment in which shipbuilding takes place presents numerous challenges. The hull structure may deform during construction, the measurement space is narrow, and the cumulative errors continue to accumulate, all of which pose a severe challenge to the accuracy of traditional positioning tooling. Under these multiple interferences, traditional positioning methods struggle to ensure precise alignment of the stern tube centerline with the theoretical centerline, often resulting in significant deviations between the two. This deviation directly threatens the stability and accuracy of the ship's power transmission, posing a potential threat to the safe and efficient operation of the ship.

[0004] Furthermore, the installation process for stern tubes and multiple shafts is extremely tedious and complex, requiring the coordinated efforts of numerous professionals. During actual operation, repeated measurements and fine-tuning are necessary, a time-consuming process. For example, installing the shaft and rudder system of a medium-sized vessel typically takes several weeks. Furthermore, given the inherent limitations of the operating space, collisions are highly likely to occur during adjustments, causing damage to the shafting or ship structure, such as structural deformation and scratches on the shaft surface. Once such damage occurs, not only is the cost of repair high, it inevitably leads to project delays. More seriously, it can leave behind a series of safety hazards, such as increased shafting vibration, seal failure, and consequent water and oil leaks. These hazards significantly reduce the reliability and affordability of the vessel.

[0005] Furthermore, in a ship's propulsion system, the fit between the propeller shaft and the shroud must be extremely precise. As a critical component influencing hydrodynamic characteristics, the shroud must tightly surround the propeller shaft, with its inner diameter precisely matched to the outer diameter of the propeller shaft. Failure to do so will significantly impact the efficiency of the ship's propulsion system. For example, if the gap between the two is too large, water flow will be turbulent, significantly reducing propeller propulsion efficiency. Conversely, if the gap is too small, friction can easily occur, damaging related components. Therefore, ensuring the concentricity of the shroud and propeller shaft is crucial during installation. When a ship is underway, the propeller shaft rotates continuously at high speed. Any deviation in concentricity will not only cause noticeable vibration and noise, but also increase wear between components, significantly shortening component life, and increasing ship operation and maintenance costs and safety risks.

[0006] Therefore, a method or device that can solve the above problems is needed. Summary of the Invention

[0007] The present invention aims to address the above-mentioned deficiencies in the prior art and proposes a positioning and installation device that can improve the installation accuracy between the propeller shaft, rudder shaft and fairing. It can effectively reduce the difficulty of installation and reduce damage to the ship structure and shafting during the installation process, thereby improving the quality and efficiency of ship construction.

[0008] The technical solution of the present invention is: a deflector installation device using the ship's stern tube and rudder stock as a positioning reference, characterized in that: the device includes a measuring vehicle, the four corners of the measuring vehicle are provided with hydraulic support legs 1, and the measuring vehicle is also provided with a base unit, the base unit is connected to a positioning frame unit via a flip mechanism, the positioning frame unit is provided with an infrared positioning device, and the front and rear ends of the measuring vehicle are also provided with a wire tensioning device. The base unit includes a flip motor 2 provided on the measuring vehicle body, the output end of the flip motor 2 is connected to two first transmission shafts 4 at the same time through a first bevel gear transmission pair 3, and the ends of the two first transmission shafts 4 are connected to a flip screw 6 rotatably supported on the measuring vehicle body through a second bevel gear transmission pair 5. The flip screw 6 is connected to a flip slider 7, and the flip slider 7 is hinged to the bottom end of a flip frame body 8 in the positioning frame unit. Two cranks 9 are also symmetrically provided on the measuring vehicle body, one end of the crank 9 is hinged to the measuring vehicle body, and the other end is hinged to the side of the flip frame body 8. A lifting motor 10 is provided in the flip frame body 8. The output end of the lifting motor 10 is connected to two second transmission shafts 12 through a third bevel gear transmission pair 11. The ends of the two second transmission shafts 12 are connected to a lifting screw 14 rotatably supported in the flip frame body 8 through a fourth bevel gear transmission pair 13. A lifting slider 15 is connected to the lifting screw 14, and the two lifting sliders 15 are connected together at the bottom of the lifting frame body 16. A positioning motor 17 is provided in the lifting frame body 16. The output end of the positioning motor 17 is connected to two third transmission shafts 19 through a fifth bevel gear transmission pair 18. The ends of the two third transmission shafts 19 are connected to a positioning screw 21 rotatably supported in the lifting frame body 16 through a sixth bevel gear transmission pair 20. A positioning slider 22 is connected to the positioning screw 21, and the two positioning sliders 22 are respectively connected to the two ends of a positioning bracket 23. An adjusting screw 24 is rotatably supported on the positioning bracket 23. One end of the adjusting screw 24 is connected to the output end of the adjusting motor, and an adjusting slider 25 is connected to the adjusting screw 24. The infrared positioning device is provided on an adjustment slider 25, which is rotatably connected to a positioning device base 26 via a rotating shaft. A rotary adjustment motor 27 is provided on the adjustment slider 25, which is connected to the positioning device base 26 via a gear transmission pair. A fixed pulley 28 and an annular member 29 are rotatably connected to the positioning device base 26. The annular member 29 is provided with a plurality of infrared emitters 30 evenly distributed in the circumferential direction, and all the infrared emitters 30 are rotatably connected to the annular member 29 via a rotating shaft. The measuring vehicle body also rotatably supports an X-axis lead screw 31 distributed along its length direction. One end of the X-axis lead screw 31 is connected to the output end of the X-axis motor 32. A Y-axis slide 33 is connected to the X-axis lead screw 31. A Y-axis lead screw 34 is rotatably supported on the Y-axis slide 33. One end of the Y-axis lead screw 34 is connected to the output end of the Y-axis motor 35 provided on the Y-axis slide 33. A guide wheel slide is connected to the Y-axis lead screw 34. A guide wheel slide is rotatably supported on the guide wheel slide. The wire tensioning device includes a reel 36, which is driven by a tensioning motor 37. The device also includes a clamping device connected to the tail shaft tube 38 or the rudder stock 39, and a steel wire rope is connected to the center of the clamping device. The steel wire rope on the clamping device corresponding to the tail shaft tube 38 passes through the fixed pulley 28 and is connected to the steel wire tensioning device at the rear end of the vehicle body. The steel wire rope on the clamping device corresponding to the rudder stock 39 passes through the guide wheel and is connected to the steel wire tensioning device at the front end of the vehicle body.

[0009] A spirit level 40 is provided on the measuring vehicle.

[0010] The wire tensioning device includes a winding shaft 36, one end of which is connected to the tensioning device housing 41, and a threaded column 42 is provided in the tensioning device housing 41, and a pressure regulating plate 43 is threadedly connected to the threaded column 42, and the protrusion on the edge of the pressure regulating plate 43 passes through a through hole opened in the tensioning device housing 41, and a spring 44 is connected to the outer sleeve of the threaded column 41, one end of the spring 44 contacts the pressure regulating plate 43, and the other end contacts the spring loading plate 45 movably connected in the tensioning device housing 41, and the threaded column 41 is movably connected to the through hole opened in the center of the spring loading plate 45, and an annular groove 46 is provided at the edge of the bottom surface of the spring loading plate 45, and a ball 47 is provided in the annular groove 46, and a drive plate 48 connected to the output end of the tensioning motor 37 is provided below the annular groove 46, and a drive protrusion 49 is provided on the drive plate 48, and the drive protrusion 49 can contact the ball 47.

[0011] The clamping device includes a bracket, a driving turntable 50 is rotatably connected at the center of the bracket, the driving turntable 50 is connected to the large center tooth 51, and three small passive teeth 52 are rotatably supported on the bracket and evenly distributed in the circumferential direction, the small passive teeth 52 are meshed with the large center teeth 51, and the small passive teeth 52 are also meshed with the driving rack 53, the driving rack 53 is fixedly connected to the clamping arm 54, and the clamping arm 54 is movably connected to the bracket, and a clamping block 55 is provided at the end of the clamping arm 54, one side of the clamping block 55 is connected to the clamping arm 54, and the outer end face of the clamping block 55 is an arc surface, and the inner end face is a V-shaped groove. A locking gear 56 is connected to the rotating shaft of the driving turntable 50, and a locking member 57 is rotatably supported on the bracket. Two locking hooks 58 are symmetrically provided on the locking member 57, and the locking hooks 58 match the toothed portions on the locking gear 56. The locking member 57 is also designed with a protruding driving portion 59, and a locking spring 60 is provided on the bracket. A locking ball 61 is provided at the free end of the locking spring 60, and the locking ball 61 matches the protruding driving portion 59.

[0012] The longitudinal section of the protruding driving portion 59 is an isosceles triangle.

[0013] Compared with the prior art, the present invention has the following advantages: This type of shroud installation device, which uses the ship's stern tube and rudder stock as a positioning reference, boasts a simple structure, ingenious design, and rational layout. It can achieve millimeter-level accuracy in shafting installation, significantly outperforming traditional methods. It utilizes a drive mechanism, including screws and gears, to ensure stable drive and adjustment motion, making installation and adjustment more convenient and efficient, reducing manual adjustment time and shortening shipbuilding cycles. The device incorporates innovative design concepts that effectively prevent damage to the shafting and ship structure from external impact, improper compression, or misalignment. This not only significantly reduces repair costs caused by installation errors, but also greatly minimizes quality risks associated with structural damage, effectively safeguarding the overall quality of the ship, extending its service life, and enhancing its competitiveness and reliability in the shipping market. Furthermore, its simple manufacturing process and low manufacturing cost offer numerous advantages, making it particularly suitable for widespread application in this field and promising a promising market. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 2 is a schematic diagram of the working state of an embodiment of the present invention.

[0015] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0016] Figure 3 1 is a top view of the base unit portion in an embodiment of the present invention.

[0017] Figure 4 It is a structural diagram of the turning mechanism part in an embodiment of the present invention.

[0018] Figure 5 It is a structural diagram of the positioning frame unit part in an embodiment of the present invention.

[0019] Figure 6 It is a structural diagram of the infrared positioning device part in an embodiment of the present invention.

[0020] Figure 7 It is a front view of the wire tensioning device part in an embodiment of the present invention.

[0021] Figure 8 1 is a top view of the clamping device portion in an embodiment of the present invention.

[0022] Figure 9 It is a front view of the clamping device part in an embodiment of the present invention.

[0023] Figure 10 2 is a top view of the driving turntable portion in an embodiment of the present invention.

[0024] Figure 11 2 is a schematic structural diagram of the locking member in an embodiment of the present invention.

[0025] Figure 12 It is a schematic diagram of the three-dimensional structure of the clamping device part in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. Figures 1 to 12 The figure shows a device for installing a shroud using the stern tube and rudder stock of a ship as a positioning reference. The device comprises a measuring vehicle, the four corners of which are provided with hydraulic support legs 1. The measuring vehicle is also provided with a base unit, the base unit is connected to a positioning frame unit via a flip mechanism, the positioning frame unit is provided with an infrared positioning device, and the front and rear ends of the measuring vehicle are also provided with a wire tensioning device. The base unit includes a flip motor 2 provided on the measuring vehicle body, the output end of the flip motor 2 is connected to two first transmission shafts 4 at the same time through a first bevel gear transmission pair 3, and the ends of the two first transmission shafts 4 are connected to a flip screw 6 rotatably supported on the measuring vehicle body through a second bevel gear transmission pair 5. The flip screw 6 is connected to a flip slider 7, and the flip slider 7 is hinged to the bottom end of a flip frame body 8 in the positioning frame unit. Two cranks 9 are also symmetrically provided on the measuring vehicle body, one end of the crank 9 is hinged to the measuring vehicle body, and the other end is hinged to the side of the flip frame body 8. A lifting motor 10 is provided in the flip frame body 8. The output end of the lifting motor 10 is connected to two second transmission shafts 12 through a third bevel gear transmission pair 11. The ends of the two second transmission shafts 12 are connected to a lifting screw 14 rotatably supported in the flip frame body 8 through a fourth bevel gear transmission pair 13. A lifting slider 15 is connected to the lifting screw 14, and the two lifting sliders 15 are connected together at the bottom of the lifting frame body 16. A positioning motor 17 is provided in the lifting frame body 16. The output end of the positioning motor 17 is connected to two third transmission shafts 19 through a fifth bevel gear transmission pair 18. The ends of the two third transmission shafts 19 are connected to a positioning screw 21 rotatably supported in the lifting frame body 16 through a sixth bevel gear transmission pair 20. A positioning slider 22 is connected to the positioning screw 21, and the two positioning sliders 22 are respectively connected to the two ends of a positioning bracket 23. An adjusting screw 24 is rotatably supported on the positioning bracket 23. One end of the adjusting screw 24 is connected to the output end of the adjusting motor, and an adjusting slider 25 is connected to the adjusting screw 24. The infrared positioning device is provided on an adjustment slider 25, which is rotatably connected to a positioning device base 26 via a rotating shaft. A rotary adjustment motor 27 is provided on the adjustment slider 25, which is connected to the positioning device base 26 via a gear transmission pair. A fixed pulley 28 and an annular member 29 are rotatably connected to the positioning device base 26. The annular member 29 is provided with a plurality of infrared emitters 30 evenly distributed in the circumferential direction, and all the infrared emitters 30 are rotatably connected to the annular member 29 via a rotating shaft. The measuring vehicle body also rotatably supports an X-axis lead screw 31 distributed along its length direction. One end of the X-axis lead screw 31 is connected to the output end of the X-axis motor 32. A Y-axis slide 33 is connected to the X-axis lead screw 31. A Y-axis lead screw 34 is rotatably supported on the Y-axis slide 33. One end of the Y-axis lead screw 34 is connected to the output end of the Y-axis motor 35 provided on the Y-axis slide 33. A guide wheel slide is connected to the Y-axis lead screw 34. A guide wheel slide is rotatably supported on the guide wheel slide. The wire tensioning device includes a reel 36, which is driven by a tensioning motor 37. The device also includes a clamping device connected to the tail shaft tube 38 or the rudder stock 39, and a steel wire rope is connected to the center of the clamping device. The steel wire rope on the clamping device corresponding to the tail shaft tube 38 passes through the fixed pulley 28 and is connected to the steel wire tensioning device at the rear end of the vehicle body. The steel wire rope on the clamping device corresponding to the rudder stock 39 passes through the guide wheel and is connected to the steel wire tensioning device at the front end of the vehicle body.

[0027] A spirit level 40 is provided on the measuring vehicle.

[0028] The wire tensioning device includes a winding shaft 36, one end of which is connected to the tensioning device housing 41, and a threaded column 42 is provided in the tensioning device housing 41, and a pressure regulating plate 43 is threadedly connected to the threaded column 42, and the protrusion on the edge of the pressure regulating plate 43 passes through a through hole opened in the tensioning device housing 41, and a spring 44 is connected to the outer sleeve of the threaded column 41, one end of the spring 44 contacts the pressure regulating plate 43, and the other end contacts the spring loading plate 45 movably connected in the tensioning device housing 41, and the threaded column 41 is movably connected to the through hole opened in the center of the spring loading plate 45, and an annular groove 46 is provided at the edge of the bottom surface of the spring loading plate 45, and a ball 47 is provided in the annular groove 46, and a drive plate 48 connected to the output end of the tensioning motor 37 is provided below the annular groove 46, and a drive protrusion 49 is provided on the drive plate 48, and the drive protrusion 49 can contact the ball 47.

[0029] The clamping device includes a bracket, a driving turntable 50 is rotatably connected at the center of the bracket, the driving turntable 50 is connected to the large center tooth 51, and three small passive teeth 52 are rotatably supported on the bracket and evenly distributed in the circumferential direction, the small passive teeth 52 are meshed with the large center teeth 51, and the small passive teeth 52 are also meshed with the driving rack 53, the driving rack 53 is fixedly connected to the clamping arm 54, and the clamping arm 54 is movably connected to the bracket, and a clamping block 55 is provided at the end of the clamping arm 54, one side of the clamping block 55 is connected to the clamping arm 54, and the outer end face of the clamping block 55 is an arc surface, and the inner end face is a V-shaped groove. A locking gear 56 is connected to the rotating shaft of the driving turntable 50, and a locking member 57 is rotatably supported on the bracket. Two locking hooks 58 are symmetrically provided on the locking member 57, and the locking hooks 58 match the toothed portions on the locking gear 56. The locking member 57 is also designed with a protruding driving portion 59, and a locking spring 60 is provided on the bracket. A locking ball 61 is provided at the free end of the locking spring 60, and the locking ball 61 matches the protruding driving portion 59.

[0030] The longitudinal section of the protruding driving portion 59 is an isosceles triangle.

[0031] The working process of the shroud installation device using the ship's stern tube and rudder stock as positioning references in the embodiment of the present invention is as follows: when installing the shroud 62 on the hull, the stern tube and rudder stock are used as positioning references. First, the measuring vehicle is moved to the bottom of the stern of the hull. After its position is roughly adjusted, the control system controls all the hydraulic support legs 1 to operate. The hydraulic support legs 1 lift the hull of the measuring vehicle, making it unable to move. In the initial state, the positioning frame units are distributed horizontally and fit closely with the body of the measuring vehicle, which can effectively save space. The control system sends a command to the flip motor 2, which drives the two flip screws 6 to rotate at the same time, thereby driving the flip slider 7 connected thereto to move along the length direction of the flip screw 6. Since the bottom end of the flip frame 8 is rotatably connected to the flip slider 7, and the flip frame 8 is also movably connected to the vehicle body through the crank 9, when the flip slider 7 moves into place, the flip frame 8 will flip from a horizontal state to a vertical state. Then the lifting motor 10 works, driving the two second transmission shafts 12 to rotate through the third bevel gear transmission pair 11, and then driving the two lifting screws 14 to rotate, so that the lifting slider 15 connected to the lifting screws 14 will move along the length direction of the lifting screws 14, thereby driving the lifting frame body 16 to move (extend) relative to the flip frame body 8, the purpose of which is to allow the infrared positioning device in the lifting frame body 16 to achieve a first-level height adjustment; At the same time, the positioning motor 17 works, driving the two third transmission shafts 19 to rotate, thereby driving the two positioning screws 21 to rotate synchronously, and the positioning slider 22 connected to the positioning screws 21 moves along its length direction, thereby driving the positioning bracket 23 to move, the purpose of which is to enable the infrared positioning device to achieve two-level height adjustment; through the above two-level height adjustment, the infrared positioning device can be moved to a specific height; After the infrared positioning device moves to the specified height, the control system can also send instructions to the adjustment motor to drive the adjustment slider 25 to move horizontally by adjusting the lead screw 24, thereby achieving horizontal adjustment of the infrared positioning device; The positioning device base 26 can be driven to rotate by rotating the adjustment motor 27, thereby changing the spatial posture of the fixed pulley 28 and the annular member 29. All infrared emitters 30 will emit infrared light to correct the installation position of the deflector 62. The infrared emitters 30 and the annular member 29 are connected by a fixed rotational connection structure, and the angle between them can be adjusted according to actual needs. The two clamping devices are fixed to the ends of the tail shaft tube 38 and the rudder stock 39 respectively. The specific fixing process is as follows: the operator holds the bracket and the driving turntable 50, and rotates the driving turntable 50 relative to the bracket, thereby driving the large center gear 51 to rotate. The large center gear 51 will simultaneously drive all the small passive gears 52 to rotate, and the driving rack 53 engaged with the small passive gears 52 will drive the clamping arm 54 to move relative to the bracket (the clamping arm 54 will move along the radial direction of the driving turntable 50), ultimately achieving simultaneous and synchronous radial movement of the three clamping blocks 55. When the three clamping blocks 55 move in the outer diameter direction, they can be supported on the inside of the pipe, and the arc-shaped outer end surfaces of the clamping blocks 55 press against the inner wall of the pipe. When the three clamping blocks 55 move in the center direction, they can be clamped on the outside of the pipe, and the V-shaped grooves on the inner end surfaces of the clamping blocks 55 clamp on the outer wall of the pipe. Regardless of which of the above fixing methods is used, after supporting / clamping, the axis of the clamping device will coincide with the center axis of the pipe; After the driving turntable 50 stops rotating, the locking member 57 is pulled, and a locking hook 58 on the locking member 57 is engaged in the tooth groove on the locking gear 56, thereby locking the driving turntable 50 connected to the locking member 57, that is, the driving turntable 50 cannot rotate in the opposite direction; which locking hook 58 locks the locking gear 56 depends on whether the clamping state of the clamping device is internal support or clamping; when the locking member 57 is pulled, the locking ball 61 is engaged with the protruding driving portion 59 at the top of the locking member 57, locking it, thereby locking the clamping device; One end of a steel wire rope is connected to the center of the clamping device clamped on the tail shaft tube 38, which is called steel wire rope A. One end of the other steel wire rope is connected to the center of the clamping device clamped on the rudder stock 39, which is called steel wire rope B. After passing through the deflector 62 pre-connected (but not fixed) to the hull, the steel wire rope A changes direction through the fixed pulley 28 and is wound around the steel wire tensioning device at the rear end of the hull, while the steel wire rope B changes direction through the guide wheel (the guide wheel can be moved in the plane direction under the action of the X-axis screw 31 and the Y-axis screw 34). (The wire rope A and wire rope B are wound around the wire rope tensioning device at the front end of the vehicle body.) Wire rope A and wire rope B are tightened by the two wire rope tensioning devices. Wire rope A is now coaxial with the axis of the stern tube 38, while wire rope B is coaxial with the axis of the rudder stock 39. This means that the central axis of the stern tube 38 and rudder stock 39 is spatially determined. The angle between wire rope A and wire rope B in the tensioned state (they must be perpendicular) is measured to determine the installation angle accuracy of the stern tube 38 and rudder stock 39. Then fix the air guide cover 62 to ensure that all the light emitted by the infrared emitter 30 will be irradiated on the side surface of the air guide cover 62. In this posture, the air guide cover 62 is installed. After installation, the installation accuracy of the air guide cover 62 meets the requirements. When the wire tensioning device is working, the tensioning motor 37 directly drives the driving plate 48 to rotate. When the driving plate 48 rotates, the driving protrusion 49 on it hits the ball 47. As long as the pressure applied by the spring 44 to the spring loading plate 45 is large enough, the driving protrusion 49 cannot push the ball 47 upward. At this time, the torque is transmitted to the ball 47 through the driving protrusion 48, thereby driving the tensioning device housing 41 to rotate as a whole, and finally realizing the winding action of the winding shaft 36. When the wire rope is tightened, the reel 36 cannot continue to rotate. At this time, the inclined surface on the driving protrusion 49 will push the ball 47 upward, allowing the driving protrusion 49 to pass. That is to say, in this state, the reel 36 and the tensioning device housing 41 are stationary, and the driving plate 48 rotates relative to the tensioning device housing 41, that is, the driving plate 48 is idling. This structure can prevent the wire rope from being broken due to excessive tension on the one hand, and can also continuously tighten the wire rope on the other hand.

Claims

1. A shroud installation device using a ship's stern tube and rudder stock as a positioning reference, characterized in that: The device comprises a measuring vehicle, the four corners of which are provided with hydraulic support legs (1), and a base unit is also provided on the measuring vehicle, the base unit is connected to a positioning frame unit via a flip mechanism, the positioning frame unit is provided with an infrared positioning device, and the front and rear ends of the measuring vehicle are also provided with a wire tensioning device. The base unit includes a flip motor (2) arranged on the measuring vehicle body, the output end of the flip motor (2) is connected to two first transmission shafts (4) at the same time through a first bevel gear transmission pair (3), and the ends of the two first transmission shafts (4) are connected to a flip screw (6) rotatably supported on the measuring vehicle body through a second bevel gear transmission pair (5), and a flip slider (7) is connected to the flip screw (6), and the flip slider (7) and the bottom end of the flip frame body (8) in the positioning frame unit are hinged to each other. Two cranks (9) are also symmetrically arranged on the measuring vehicle body, one end of the crank (9) is hinged to the measuring vehicle body, and the other end is hinged to the side of the flip frame body (8). A lifting motor (10) is provided in the flip frame body (8), and the output end of the lifting motor (10) is connected to two second transmission shafts (12) through a third bevel gear transmission pair (11), and the ends of the two second transmission shafts (12) are connected to a lifting screw (14) rotatably supported in the flip frame body (8) through a fourth bevel gear transmission pair (13), and a lifting slider (15) is connected to the lifting screw (14), and the two lifting sliders (15) are connected to the bottom of the lifting frame body (16). A positioning motor (17) is provided in the lifting frame body (16), and the output end of the positioning motor (17) is connected to two third transmission shafts (19) through a fifth bevel gear transmission pair (18), and the ends of the two third transmission shafts (19) are connected to a positioning screw (21) rotatably supported in the lifting frame body (16) through a sixth bevel gear transmission pair (20), and a positioning slider (22) is connected to the positioning screw (21), and the two positioning sliders (22) are respectively connected to the two ends of the positioning bracket (23), and an adjusting screw (24) is rotatably supported on the positioning bracket (23), one end of the adjusting screw (24) is connected to the output end of the adjusting motor, and an adjusting slider (25) is connected to the adjusting screw (24). The infrared positioning device is arranged on an adjusting slider (25), and the adjusting slider (25) is rotatably connected to the positioning device base (26) via a rotating shaft. A rotary adjusting motor (27) is arranged on the adjusting slider (25), and the rotary adjusting motor (27) is connected to the positioning device base (26) via a gear transmission pair. A fixed pulley (28) and an annular component (29) are rotatably connected to the positioning device base (26). A plurality of infrared emitters (30) uniformly distributed in a circumferential direction are arranged on the annular component (29), and all the infrared emitters (30) are rotatably connected to the annular component (29) via a rotating shaft. An X-axis lead screw (31) distributed along the length direction of the measuring vehicle body is also rotatably supported. One end of the X-axis lead screw (31) is connected to the output end of the X-axis motor (32). A Y-axis slide (33) is connected to the X-axis lead screw (31). A Y-axis lead screw (34) is rotatably supported on the Y-axis slide (33). One end of the Y-axis lead screw (34) is connected to the output end of the Y-axis motor (35) provided on the Y-axis slide (33). A guide wheel slide is connected to the Y-axis lead screw (34). A guide wheel slide is rotatably supported on the guide wheel slide. The steel wire tensioning device comprises a reel (36), and the reel (36) is driven by a tensioning motor (37). The device also includes a clamping device connected to the tail tube (38) or the rudder stock (39), a steel wire rope is connected to the center of the clamping device, the steel wire rope on the clamping device corresponding to the tail tube (38) passes through the fixed pulley (28) and is connected to the steel wire tensioning device at the rear end of the vehicle body, and the steel wire rope on the clamping device corresponding to the rudder stock (39) passes through the guide wheel and is connected to the steel wire tensioning device at the front end of the vehicle body.

2. The device for installing a shroud with the stern tube and rudder stock of a ship as a positioning reference according to claim 1, characterized in that: A level (40) is provided on the measuring vehicle.

3. The precise positioning and installation device for the propagation tail tube and rudder stock according to claim 1, characterized in that: The wire tensioning device includes a reel (36), one end of which is connected to the tensioning device housing (41), a threaded column (42) is provided in the tensioning device housing (41), a pressure regulating plate (43) is threadedly connected to the threaded column (42), a protrusion on the edge of the pressure regulating plate (43) passes through a through hole provided on the tensioning device housing (41), a spring (44) is connected to the outer sleeve of the threaded column (41), one end of the spring (44) is in contact with the pressure regulating plate (43), and the other end is movably connected to the tensioning device. The spring loading plate (45) is in contact with the housing (41), and the threaded column (41) is movably connected to the through hole opened at the center of the spring loading plate (45). An annular groove (46) is provided at the edge of the bottom surface of the spring loading plate (45), and a ball (47) is provided in the annular groove (46). A driving plate (48) connected to the output end of the tensioning motor (37) is provided below the annular groove (46), and a driving protrusion (49) is provided on the driving plate (48), and the driving protrusion (49) can contact the ball (47).

4. The precise positioning and installation device for a ship's stern tube and rudder stock according to claim 1, characterized in that: The clamping device includes a bracket, a driving turntable (50) is rotatably connected at the center of the bracket, the driving turntable (50) is connected to the large center tooth (51), and three small passive teeth (52) are rotatably supported on the bracket and are evenly distributed in the circumferential direction. The small passive teeth (52) and the large center tooth (51) are meshed with each other, and the small passive teeth (52) are also meshed with the driving rack (53). The driving rack (53) is fixedly connected to the clamping arm (54), and the clamping arm (54) is movably connected to the bracket. A clamping block (55) is provided at the end of the clamping arm (54), and one side of the clamping block (55) is connected to the clamping arm (54). At the same time, the outer end face of the clamping block (55) is an arc surface, and the inner end face is a V-shaped groove. A locking gear (56) is connected to the rotating shaft of the driving turntable (50), and a locking member (57) is rotatably supported on the bracket. Two locking hooks (58) are symmetrically provided on the locking member (57), and the locking hooks (58) match the toothed portion on the locking gear (56). The locking member (57) is also designed with a protruding driving portion (59). A locking spring (60) is provided on the bracket, and a locking ball (61) is provided at the free end of the locking spring (60), and the locking ball (61) matches the protruding driving portion (59).

5. The precise positioning and installation device for a ship's stern tube and rudder stock according to claim 4, characterized in that: The longitudinal section of the protruding driving portion (59) is an isosceles triangle.

Images