Pitch feedback device

Abstract

The present disclosure provides a pitch feedback device, belonging to the technical field of ship equipment. The pitch feedback device comprises a feedback rod, a transmission ring assembly, a detection rod and a gap compensation assembly; the transmission ring assembly is coaxially sleeved outside the rotating shaft pipe of the propeller, the feedback rod and the detection rod are respectively located at two ends of the transmission ring assembly, the feedback rod is hinged with the transmission ring assembly through a first hinge shaft, the detection rod is hinged with the transmission ring assembly through a second hinge shaft, the gap compensation assembly is connected with the detection rod and is used for applying pressure to the detection rod to limit the movement of the transmission ring assembly and the detection rod relative to the second hinge shaft and limit the movement of the transmission ring assembly and the feedback rod relative to the first hinge shaft, and the direction of the pressure is the same as or opposite to the translation direction of the detection rod. The present disclosure can improve the detection accuracy of the pitch position of the propeller.

Description

Technical Field

[0001] This disclosure belongs to the field of marine equipment technology, and specifically relates to a pitch feedback device. Background Technology

[0002] A controllable pitch propeller is a type of propeller whose pitch is adjusted by controlling a mechanism in the hub to rotate the blades.

[0003] In related technologies, pitch is typically detected in real time using a pitch feedback device. This device includes a feedback ring, a transmission assembly, and a detection assembly. The feedback ring is sleeved on the outside of the controllable pitch propeller's swivel tube and connected to an axially moving component inside the tube. The feedback ring can rotate with the swivel tube and translate along its axial direction. The position of the feedback ring's translational movement indicates different pitches. The detection assembly is movably connected to the feedback ring via the transmission assembly. The detection assembly can translate with the feedback ring but does not rotate. The pitch is determined by detecting the position of the detection assembly using a sensing element (e.g., a potential sensor).

[0004] However, since the detection component and the feedback loop are connected via a transmission component, gaps exist between the detection component and the transmission component, as well as between the transmission component and the feedback loop. When the feedback loop moves, these gaps cause fluctuations in the distance the detection component moves, leading to decreased accuracy in the detected pitch. Furthermore, if the position of the feedback loop is directly detected using a potential sensor, the sensor's detection head is connected to the end face of the feedback loop. Since the feedback loop rotates with the rotating shaft, excessive runout of the feedback loop's end face can occur during detection. This changes the position of the potential sensor's detection head, causing fluctuations in the data collected by the potential sensor and further reducing pitch accuracy. Summary of the Invention

[0005] This disclosure provides a pitch feedback device that can improve the pitch detection accuracy of controllable propellers. The technical solution is as follows:

[0006] This disclosure provides a pitch feedback device, which includes a feedback rod, a drive ring assembly, a detection rod, and a clearance compensation assembly. The drive ring assembly is coaxially sleeved outside the rotating shaft tube of a propeller. The feedback rod and the detection rod are located at opposite ends of the drive ring assembly. The feedback rod is hinged to the drive ring assembly via a first hinge shaft, and the detection rod is hinged to the drive ring assembly via a second hinge shaft. The first and second hinge shafts are parallel to each other and both perpendicular to the axis of the drive ring assembly. The feedback rod is used to connect to the rotating shaft tube, and the feedback rod can be relatively... The rotary shaft tube translates along its axial direction and can rotate synchronously with it; the transmission ring assembly is used to make the detection rod and the feedback rod translate synchronously, the translation direction of the detection rod being opposite to or the same as the translation direction of the feedback rod; the gap compensation assembly is connected to the detection rod and is used to apply pressure to the detection rod to restrict the movement of the transmission ring assembly and the detection rod relative to the second hinge axis, and to restrict the movement of the transmission ring assembly and the feedback rod relative to the first hinge axis, the direction of the pressure being the same as or opposite to the translation direction of the detection rod.

[0007] In another implementation of this disclosure, the detection rod has a limiting structure near the second hinge axis; the gap compensation assembly includes a fixed sleeve and an elastic element; the fixed sleeve is fitted over the detection rod and has a gap fit with the detection rod; the elastic element is fitted over the detection rod, with one end located inside the fixed sleeve, and both ends of the elastic element are clamped between the fixed sleeve and the limiting structure.

[0008] In another implementation of this disclosure, the gap compensation assembly further includes a guide ring, which is coaxially located inside the fixed sleeve and located at both ends of the elastic element, along with the second hinge shaft. The guide ring is sleeved outside the detection rod and has a gap fit with the detection rod.

[0009] In another implementation of this disclosure, the transmission ring assembly includes a first transmission ring, a second transmission ring, and a transmission sleeve. The first transmission ring and the second transmission ring are respectively sleeved on both ends of the transmission sleeve. The first transmission ring is movably connected to the transmission sleeve via a first connecting member, and the second transmission ring is movably connected to the transmission sleeve via a second connecting member. The first transmission ring is rotatable relative to the transmission sleeve or the second transmission ring about its own axis. The first connecting member and the second connecting member are both rotating members, and their rotation axes are parallel to the first hinge axis. The opposite sides of the first transmission ring are respectively hinged to the feedback rod via the first hinge axis and to the rotary shaft tube via a third hinge axis. The opposite sides of the second transmission ring are respectively hinged to the detection rod via the second hinge axis and to the hull via a fourth hinge axis. The third hinge axis and the fourth hinge axis are both parallel to the first hinge axis.

[0010] In another implementation of this disclosure, the transmission sleeve has a first limiting ring groove and a second limiting ring groove at both ends near its own axis, the first connecting member is partially movably located in the first limiting ring groove, and the second connecting member is partially movably located in the second limiting ring groove.

[0011] In another implementation of this disclosure, the first connecting member includes two first bolt-type roller bearings, which are coaxially located on the extension line of the first diameter of the first transmission ring. One end of each of the two first bolt-type roller bearings is connected to the first transmission ring, and the other end is located in the first limiting ring groove. The first bolt-type roller bearings can move with the first transmission ring in the first limiting ring groove.

[0012] In another implementation of this disclosure, the first hinge shaft and the third hinge shaft are located on the extension line of the second diameter of the first transmission ring, and the straight line containing the first diameter is perpendicular to the straight line containing the second diameter.

[0013] In another implementation of this disclosure, the second connector includes two second bolt-type roller bearings, which are coaxially located on the extension line of the third diameter of the second transmission ring. One end of each of the two second bolt-type roller bearings is connected to the second transmission ring, and the other end is located in the second limiting ring groove. The second bolt-type roller bearings are movable in the second limiting ring groove.

[0014] In another implementation of this disclosure, the transmission ring assembly further includes a ball sleeve, which is sleeved outside the rotary shaft tube and located inside the transmission sleeve, with both ends of the ball sleeve clamped inside both ends of the transmission sleeve; a plurality of balls are embedded at intervals in the inner wall of the ball sleeve, and the plurality of balls are in sliding contact with the rotary shaft tube and the transmission sleeve respectively.

[0015] In another implementation of this disclosure, the pitch feedback device further includes a first fixed hinge seat and a second fixed hinge seat; the first fixed hinge seat and the feedback rod are located at one end of the transmission ring assembly, and the second fixed hinge seat and the detection rod are located at the other end of the transmission ring assembly; the first fixed hinge seat and the feedback rod are respectively located on opposite sides of the transmission ring assembly, the first fixed hinge seat is connected to the rotary shaft tube and is hinged to the transmission ring assembly through the third hinge shaft; the second fixed hinge seat and the detection rod are respectively located on opposite sides of the transmission ring assembly, the second fixed hinge seat is connected to the hull and is hinged to the transmission ring assembly through the fourth hinge shaft.

[0016] The beneficial effects of the technical solutions provided in this disclosure are:

[0017] When the pitch feedback device provided in this embodiment is used in a pitch control propeller, since the pitch feedback device includes a feedback rod that is connected to the rotary shaft tube of the pitch control propeller and can translate relative to the rotary shaft tube along the axial direction of the rotary shaft tube, and the feedback rod can rotate synchronously with the rotary shaft tube, when the pitch control propeller changes its pitch, the feedback rod can translate linearly relative to the rotary shaft tube along with the axial moving parts within the pitch control propeller's shaft system, so as to feedback the pitch change through the feedback rod.

[0018] Since the pitch feedback device also includes a transmission ring assembly and a detection rod, and the transmission ring assembly is hinged to both the feedback rod and the detection rod, and furthermore, the transmission ring assembly is used to synchronize the translation of the detection rod and the feedback rod, when the pitch of the controllable propeller changes, the transmission ring assembly can synchronize the translation of the detection rod relative to the rotary shaft tube as the feedback rod translates. Because the detection rod is not connected to the rotary shaft tube, the pitch can be determined by directly detecting the linear displacement output by the detection rod through a detection element, avoiding inaccuracies caused by directly detecting the feedback rod.

[0019] Furthermore, since the pitch feedback device also includes a gap compensation component, which is used to apply pressure to the detection rod, the movement of the transmission ring assembly and the detection rod relative to the second hinge axis and the movement of the transmission ring assembly and the feedback rod relative to the first hinge axis can be restricted. This ensures that there is no axial movement between the transmission ring assembly and the detection rod, or between the transmission ring assembly and the feedback rod, thus guaranteeing that the displacement of the feedback rod and the displacement between the detection rod meet the quantitative relationship in real time, thereby improving the pitch detection accuracy. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the pitch feedback device provided in the embodiments of this disclosure;

[0022] Figure 2 yes Figure 1 A cross-sectional view along the BB direction;

[0023] Figure 3 yes Figure 1 A cross-sectional view along the AA direction.

[0024] The symbols in the diagram represent the following meanings:

[0025] 100. Rotary shaft tube; 101. Flange; 102. Pipe body; 301. First hinge shaft; 302. Second hinge shaft; 303. Third hinge shaft; 304. Fourth hinge shaft; 305. First connecting piece; 306. Second connecting piece;

[0026] 1. Feedback rod; 12. Guide sleeve;

[0027] 2. Transmission ring assembly; 21. First transmission ring; 22. Second transmission ring; 23. Transmission sleeve; 231. First end cap; 232. Second end cap; 233. Sleeve body; 230. Outer flange; 2301. First outer flange; 2302. Second outer flange; 2300. Annular opening; 201. First limiting ring groove; 202. Second limiting ring groove; 24. Ball sleeve; 241. Ball;

[0028] 3. Detection rod; 30. Limiting structure;

[0029] 3051, First bolt type roller bearing; 3061, Second bolt type roller bearing;

[0030] 4. Gap compensation assembly; 41. Fixing sleeve; 410. Limiting step; 411. Vent hole; 412. Vent groove; 42. Elastic element; 43. Guide ring; 44. First sealing ring; 45. Second sealing ring;

[0031] 5. First fixed hinge seat; 6. Second fixed hinge seat; 7. Housing. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0033] Controllable pitch propellers are a crucial component of a ship's propulsion system. By adjusting the pitch in both directions, they enable the ship to sail and reverse without changing the shaft direction, providing high maneuverability. The pitch adjustment process involves the coordinated operation of the electromechanical, hydraulic, and electronic systems. The electronic control system sends a command signal, the hydraulic system switches the oil circuit, and hydraulic oil enters the pitch cylinder. The pitch cylinder drives the crank-slider mechanism to change the propeller blade pitch. A pitch feedback device is used to indicate the propeller blade pitch. When the feedback signal matches the command signal, one cycle of pitch closed-loop control is completed.

[0034] The pitch feedback device is sleeved outside the rotating shaft tube 100 in the shaft system of the pitch control propeller and is rigidly connected to an axially movable component inside the rotating shaft tube 100. The pitch feedback device is used to reflect the pitch in real time.

[0035] This disclosure provides a pitch feedback device, such as... Figure 1 As shown, the pitch feedback device includes a feedback rod 1, a transmission ring assembly 2, a detection rod 3, and a gap compensation assembly 4.

[0036] The transmission ring assembly 2 is coaxially sleeved outside the rotating shaft tube 100 of the propeller. The feedback rod 1 and the detection rod 3 are located at the two ends of the transmission ring assembly 2, respectively. The feedback rod 1 is hinged to the transmission ring assembly 2 through the first hinge shaft 301, and the detection rod 3 is hinged to the transmission ring assembly 2 through the second hinge shaft 302. The first hinge shaft 301 and the second hinge shaft 302 are parallel to each other and both are perpendicular to the axis of the transmission ring assembly 2.

[0037] Feedback rod 1 is used to connect to the rotary shaft tube 100. Feedback rod 1 can translate relative to the rotary shaft tube 100 along the axial direction of the rotary shaft tube 100 and can rotate synchronously with the rotary shaft tube 100. Transmission ring assembly 2 is used to make detection rod 3 translate synchronously with feedback rod 1. The translation direction of detection rod 3 is opposite to or the same as the translation direction of feedback rod 1.

[0038] The gap compensation component 4 is connected to the detection rod 3 and is used to apply pressure to the detection rod 3 to restrict the movement of the transmission ring assembly 2 and the detection rod 3 relative to the second hinge shaft 302, and to restrict the movement of the transmission ring assembly 2 and the feedback rod 1 relative to the first hinge shaft 301. The direction of the pressure is the same as or opposite to the translation direction of the detection rod 3.

[0039] When the pitch feedback device provided in this embodiment is used in a pitch control propeller, since the pitch feedback device includes a feedback rod 1, and the feedback rod 1 is connected to the rotary shaft tube 100 of the pitch control propeller, and can translate relative to the rotary shaft tube 100 along the axial direction of the rotary shaft tube 100 of the pitch control propeller, and the feedback rod 1 can rotate synchronously with the rotary shaft tube 100, when the pitch control propeller changes its pitch, the feedback rod 1 can translate linearly relative to the rotary shaft tube 100 together with the axial moving parts in the shaft system of the pitch control propeller, so as to feed back the pitch change through the feedback rod 1.

[0040] Since the pitch feedback device also includes a transmission ring assembly 2 and a detection rod 3, and the transmission ring assembly 2 is hinged to both the feedback rod 1 and the detection rod 3, and the transmission ring assembly 2 is also used to make the detection rod 3 and the feedback rod 1 translate synchronously, when the pitch of the pitch control propeller changes, the feedback rod 1 translates relative to the rotary shaft tube 100, and the transmission ring assembly 2 enables the detection rod 3 to translate synchronously. Since the detection rod 3 is not connected to the rotary shaft tube 100, the pitch can be determined by directly detecting the linear displacement output by the detection rod 3 through the detection element, avoiding inaccuracies caused by directly detecting the feedback rod 1.

[0041] Furthermore, since the pitch feedback device also includes a gap compensation component 4, and the gap compensation component 4 is used to apply pressure to the detection rod 3 (the pressure direction is...) Figure 1 (in the downward direction), this restricts the movement of the transmission ring assembly 2 and the detection rod 3 relative to the second hinge shaft 302, and restricts the movement of the transmission ring assembly 2 and the feedback rod 1 relative to the first hinge shaft 301, so that there is no axial movement between the transmission ring assembly 2 and the detection rod 3, and between the transmission ring assembly 2 and the feedback rod 1, ensuring that the displacement of the feedback rod 1 and the displacement between the detection rod 3 meet the quantitative relationship in real time, thereby improving the detection accuracy of the pitch.

[0042] Optionally, the rotary shaft tube 100 includes a flange 101 and a tube body 102, with the flange 101 connected to the end of the tube body 102. The tube body 102 is coaxially located within the transmission ring assembly 2. The middle portion of the feedback rod 1 is inserted into the flange 101, and one end of the feedback rod 1 is connected to an axially moving component within the rotary shaft tube 100 (not shown). The other end of the feedback rod 1 is hinged to the transmission ring assembly 2 via a first hinge shaft 301. The length direction of the feedback rod 1 is the same as its translational direction within the tube body 102.

[0043] In the above implementation, the feedback rod 1 is used to connect with the rotary shaft tube 100 and the axial moving component inside the rotary shaft tube 100, so as to track and feedback the change in pitch.

[0044] Optionally, a guide sleeve 12 is provided outside the feedback rod 1. The guide sleeve 12 is located in the flange 101 and is fixedly connected to the flange 101. The guide sleeve 12 is coaxially sleeved outside the feedback rod 1, and the guide sleeve 12 and the feedback rod 1 are clearance-fitted.

[0045] The guide sleeve 12 is used to limit the translation of the feedback rod 1, so that when the feedback rod 1 translates relative to the rotary shaft tube 100, it can only move along the length direction of the feedback rod 1.

[0046] Optionally, the detection rod 3 has a limiting structure 30 near the second hinge axis 302. The gap compensation assembly 4 includes a fixing sleeve 41 and an elastic element 42. The fixing sleeve 41 is fitted over the detection rod 3 and has a clearance fit with the detection rod 3.

[0047] The elastic element 42 is sleeved outside the detection rod 3, with one end located inside the fixed sleeve 41. Both ends of the elastic element 42 are clamped between the fixed sleeve 41 and the limiting structure 30.

[0048] In the above implementation, the fixed sleeve 41 provides a mounting base for the elastic element 42. The elastic element 42 is fitted over the detection rod 3 so that the fixed sleeve 41 cooperates with the detection rod 3 to apply preload. This ensures that both the detection rod 3 and the transmission ring assembly 2 are under pressure, maintaining a fixed connection gap in the pitch feedback device. This prevents relative movement between the transmission ring assembly 2 and the detection rod 3, as well as between the transmission ring assembly 2 and the feedback rod 1. It also solves the problem of low pitch detection accuracy due to the connection gap, significantly improving the pitch detection accuracy.

[0049] In this embodiment, the elastic element 42 is a telescopic spring, and in the initial state, the elastic element 42 is under compression, and the elastic element 42 applies pressure to the detection rod 3. Figure 1 Downward pressure.

[0050] In other examples, the gap compensation component 4 can also be other structures, such as an electric cylinder capable of providing pressure. The movable rod of the electric cylinder is partially connected to the detection rod 3. The piston rod of the electric cylinder also applies pressure to the detection rod 3. Figure 1 The downward pressure is moderate. However, the electric cylinder is not very convenient to connect and arrange.

[0051] Optionally, the limiting structure 30 is an end plate disposed on the end of the detection rod 3. The end plate abuts against one end of the elastic member 42. A rotating lug is inserted into the end plate, and the rotating lug is hinged to the transmission ring assembly 2 through the second hinge shaft 302. In this way, the detection rod 3 and the transmission ring assembly 2 can be hinged.

[0052] Similarly, a rotating ear plate is also fixedly connected to the end of the feedback rod 1. The rotating ear plate connected to the end of the feedback rod 1 is hinged to the transmission ring assembly 2 through the first hinge shaft 301.

[0053] In this embodiment, the fixing sleeve 41 is connected to the hull.

[0054] Optionally, a limiting step 410 is formed in the middle of the inner wall of the fixing sleeve 41. One end of the elastic member 42 abuts against the limiting step 410.

[0055] Since the pitch feedback device is generally located inside the controllable pitch propeller housing, the corresponding clearance compensation component 4 is generally located in the oil. Therefore, the fixed sleeve 41 is filled with oil. For venting, the side wall of the fixed sleeve 41 has a vent hole 411, which is sealed by a vent plug. When it is necessary to vent the fixed sleeve 41 to release pressure, the vent plug can be removed.

[0056] Optionally, the gap compensation assembly 4 further includes a guide ring 43, which is coaxially located inside the fixed sleeve 41 and the second hinge shaft 302 is located at both ends of the elastic member 42. The guide ring 43 is sleeved on the outside of the detection rod 3 and has a gap fit with the detection rod 3.

[0057] In the above implementation, since the detection rod 3 can move relative to the fixed sleeve 41, the guide ring 43 provided in the fixed sleeve 41 can limit and guide the movement of the detection rod 3, so that the detection rod 3 can move along a straight line.

[0058] Optionally, the gap compensation assembly 4 further includes a first sealing ring 44, which is located inside the fixing sleeve 41 and at the end of the guide ring 43 away from the elastic member 42. The first sealing ring 44 is clamped between the detection rod 3 and the fixing sleeve 41.

[0059] In the above implementation, the first sealing ring 44 is used to seal the detection rod 3 and the fixed sleeve 41 so that the oil in the fixed sleeve 41 will not leak.

[0060] To facilitate the installation of the first sealing ring 44, the inner wall of the end of the fixing sleeve 41 away from the elastic member 42 has a first mounting groove, and the first sealing ring 44 is located in the first mounting groove.

[0061] In this embodiment, the first sealing ring 44 is a lip-shaped sealing ring. This improves the sealing effect.

[0062] Optionally, the gap compensation assembly 4 further includes a second sealing ring 45, which is located inside the fixing sleeve 41 and on the side of the guide ring 43 away from the first sealing ring 44. The second sealing ring 45 is clamped between the detection rod 3 and the fixing sleeve 41.

[0063] In the above implementation, the second sealing ring 45 is located on the side of the first sealing ring 44 facing the elastic member 42, serving as the first seal between the detection rod 3 and the fixed sleeve 41, so that the liquid inside the fixed sleeve 41 will not leak.

[0064] In this embodiment of the present disclosure, in order to facilitate the installation of the second sealing ring 45, the inner wall of the end of the fixing sleeve 41 away from the elastic member 42 is also provided with a second mounting groove, and the second sealing ring 45 is located in the second mounting groove.

[0065] For example, there may be multiple second sealing rings 45. The multiple second sealing rings 45 are all spaced apart between the elastic member 42 and the guide ring 43. Correspondingly, there are also two second sealing grooves, with each second sealing ring 45 located in one second sealing groove.

[0066] Optionally, the inner wall of the fixing sleeve 41 also has an annular vent groove 412, which is located between the two second sealing rings 45 and is connected to the vent hole 411.

[0067] Optionally, the transmission ring assembly 2 includes a first transmission ring 21, a second transmission ring 22, and a transmission sleeve 23. The first transmission ring 21 and the second transmission ring 22 are respectively sleeved on both ends of the transmission sleeve 23. The first transmission ring 21 is movably connected to the transmission sleeve 23 via a first connecting member 305, and the second transmission ring 22 is movably connected to the transmission sleeve 23 via a second connecting member 306. The first transmission ring 21 can rotate relative to the transmission sleeve 23 or the second transmission ring 22 about its own axis. Both the first connecting member 305 and the second connecting member 306 are rotating components, and their rotation axes are parallel to the first hinge shaft 301.

[0068] The opposite sides of the first transmission ring 21 are respectively hinged to the feedback rod 1 via the first hinge shaft 301 and to the rotary shaft tube 100 via the third hinge shaft 303. The opposite sides of the second transmission ring 22 are respectively hinged to the detection rod 3 via the second hinge shaft 302 and to the hull via the fourth hinge shaft 304. The third hinge shaft 303 and the fourth hinge shaft 304 are both parallel to the first hinge shaft 301.

[0069] In the above implementation, the first transmission ring 21 is hinged to the rotary shaft tube 100 and the feedback rod 1, and the second transmission ring 22 is hinged to the hull and the detection rod 3. The transmission sleeve 23 is rotatably connected to the first transmission ring 21 and the second transmission ring 22 respectively. Thus, when the feedback rod 1 rotates synchronously with the rotary shaft tube 100 and moves relative to the rotary shaft tube 100, the feedback rod 1 rotates and moves simultaneously, causing the first transmission ring 21 to rotate about the third hinge shaft 303. The first transmission ring 21 rotates synchronously with the rotary shaft tube 100 and can also swing about the third hinge shaft 303. After the first transmission ring 21 swings about the third hinge shaft 303, it causes the transmission sleeve 23 to move up and down. After the transmission sleeve 23 moves up and down, it causes the second transmission ring 22 to move up and down. After the second transmission ring 22 moves up and down, it will cause the second transmission ring 22 to swing around the fourth hinge shaft 304. After the second transmission ring 22 swings, the detection rod 3 hinged to the second transmission ring 22 will move up and down.

[0070] In other words, the first transmission ring 21 will rotate synchronously with the rotating shaft tube 100, while the transmission sleeve 23 and the second transmission ring 22 will not rotate synchronously with the rotating shaft tube 100. Therefore, the transmission directions of the first transmission ring 21 and the second transmission ring 22 are exactly opposite. While the first transmission ring 21 rotates together with the rotating shaft tube 100, it rotates about the third hinge shaft 303, causing the transmission sleeve 23 to move up and down. The second transmission ring 22 only rotates about the fourth hinge shaft 304 and will not rotate with the rotating shaft tube 100.

[0071] Optionally, the transmission sleeve 23 has a first limiting ring groove 201 and a second limiting ring groove 202 at its two ends near its own axis, the first connecting member 305 is partially movably located in the first limiting ring groove 201, and the second connecting member 306 is partially movably located in the second limiting ring groove 202.

[0072] This allows the first connecting member 305 to move via the first limiting annular groove 201, and the second connecting member 306 to move via the second limiting annular groove 202, enabling both the first and second connecting members 305 and 306 to connect with the transmission sleeve 23. Furthermore, after the first transmission ring 21 swings about the third hinge axis 303, it can drive the first connecting member 305 and the second connecting member 306 to move along the axis of the transmission sleeve 23, thereby causing the second transmission ring 22 to swing about the fourth hinge axis 304 via the transmission sleeve 23.

[0073] Optionally, the transmission sleeve 23 includes a first end cap 231, a second end cap 232, and a sleeve body 233. The first end cap 231 and the second end cap 232 are located at both ends of the sleeve body 233, and are both connected to the sleeve body 233.

[0074] The outer wall of the sleeve 233 has an outer flange 230 in the middle. The two ends of the outer flange 230 along the axial direction of the transmission sleeve 23 form a first limiting ring groove 201 and a second limiting ring groove 202 with the first end cover 231 and the second end cover 232, respectively. The first connecting member 305 is partially movably located in the first limiting ring groove 201, and the second connecting member 306 is partially movably located in the second limiting ring groove 202.

[0075] In the above implementation, the transmission sleeve 23 is configured as a first end cap 231, a second end cap 232, and a sleeve body 233. This not only facilitates the installation of the first connector 305 and the second connector 306, but also allows the two ends of the outer flange 230 to form a first limiting annular groove 201 and a second limiting annular groove 202 with the first end cap 231 and the second end cap 232, respectively. This provides rotational space for the first connector 305 through the first limiting annular groove 201 and for the second connector 306 through the second limiting annular groove 202, enabling the first connector 305 and the second connector 306 to connect with the transmission sleeve 23. Furthermore, after the first transmission ring 21 swings about the third hinge axis 303, it can drive the first connector 305 and the second connector 306 to move along the axis of the transmission sleeve 23, thereby causing the second transmission ring 22 to swing about the fourth hinge axis 304 via the transmission sleeve 23.

[0076] In other words, when the feedback rod 1 moves up and down relative to the rotary shaft tube 100, the feedback rod 1 will drive the first transmission ring 21 to swing about the third hinge shaft 303. After the first transmission ring 21 swings, the first connecting member 305 will swing up and down as well. Since the first connecting member 305 is partially located in the first limiting ring groove 201, the up and down movement of the first connecting member 305 will cause the transmission sleeve 23 to move up and down. After the transmission sleeve 23 moves up and down, it will cause the second connecting member 306 in the second limiting ring groove 202 to move up and down. After the second connecting member 306 moves, the second transmission ring 22 will swing about the fourth hinge shaft 304, thereby causing the detection rod 3 to move synchronously.

[0077] In this embodiment, to reduce the weight of the transmission sleeve 23, an annular opening 2300 can be provided in the middle of the outer flange 230. The annular opening 2300 divides the outer flange 230 into two spaced-apart first outer flanges 2301 and second outer flanges 2302. The first outer flange 2301 and the second end cap 232 define a second limiting annular groove 202. The second outer flange 2302 and the first end cap 231 define a first limiting annular groove 201.

[0078] In order to achieve a detachable connection, the first end cap 231 and the second end cap 232 are respectively connected to the sleeve 233 by multiple bolt fasteners.

[0079] Figure 2 yes Figure 1 A sectional view along the BB direction, combined with Figure 2 The first connecting member 305 includes two first bolt-type roller bearings 3051, which are coaxially located on the extension line of the first diameter of the first transmission ring 21. Figure 2 On the straight line a), one end of each of the two first bolt type roller bearings 3051 is connected to the first transmission ring 21, and the other end is located in the first limiting ring groove 201. The first bolt type roller bearing 3051 can follow the first transmission ring 21 and move along the circumference of the first limiting ring groove 201 in the first limiting ring groove 201.

[0080] In the above implementation, the first connecting member 305 is configured as two first bolt-type roller bearings 3051, which can improve the connection stability between the first transmission ring 21 and the transmission sleeve 23. Moreover, the first bolt-type roller bearings 3051 can be precisely fitted into the first limiting ring groove 201 through the protruding outer wall of the bearing, so that when the first transmission ring 21 swings, it will carry the first bolt-type roller bearings 3051 to move axially.

[0081] Optionally, the first hinge shaft 301 and the third hinge shaft 303 are located on the extension line of the second diameter of the first transmission ring 21. Figure 2 On the middle line b), and the line containing the first diameter is perpendicular to the line containing the second diameter.

[0082] In the above implementation, the above arrangement allows the two first bolt-type roller bearings 3051 to be arranged symmetrically on both sides of the third hinge shaft 303 with the third hinge shaft 303 as the axis. This ensures that the hinge force of the first hinge shaft 301 or the third hinge shaft 303 on the transmission sleeve 23 and the force of the two first bolt-type roller bearings 3051 on the transmission sleeve 23 are distributed around the transmission sleeve 23, reducing the stress deformation of the transmission sleeve 23 and further improving the detection accuracy.

[0083] Figure 3 yes Figure 1 A cross-sectional view along the AA direction, combined with Figure 3 Optionally, the second connector 306 includes two second bolt-type roller bearings 3061, which are coaxially located along the extension of the third diameter of the second transmission ring 22. Figure 3 On the straight line c), one end of each of the two second bolt type roller bearings 3061 is connected to the second transmission ring 22, and the other end is located in the second limiting ring groove 202. The second bolt type roller bearing 3061 can move circumferentially in the second limiting ring groove 202.

[0084] In the above implementation, the second connecting member 306 is configured as two second bolt-type roller bearings 3061, which can improve the connection stability between the second transmission ring 22 and the transmission sleeve 23. Moreover, the second bolt-type roller bearings 3061 can be fitted into the second limiting ring groove 202 through their protruding outer walls, so that when the transmission sleeve 23 moves up and down, it can drive the second transmission ring 22 to swing.

[0085] Optionally, the second hinge shaft 302 and the fourth hinge shaft 304 are located on the extension line of the fourth diameter of the second transmission ring 22. Figure 3 The line containing the third diameter is perpendicular to the line containing the fourth diameter.

[0086] In the above implementation, the above arrangement allows the two second bolt-type roller bearings 3061 to be arranged symmetrically on both sides of the fourth hinge shaft 304 with the fourth hinge shaft 304 as the axis. This ensures that the hinge force of the fourth hinge shaft 304 or the second hinge shaft 302 on the transmission sleeve 23 and the force of the two second bolt-type roller bearings 3061 on the transmission sleeve 23 are distributed around the transmission sleeve 23, reducing the stress deformation of the transmission sleeve 23 and further improving the detection accuracy.

[0087] See you again Figure 1 Optionally, the transmission ring assembly 2 also includes a ball sleeve 24, which is sleeved outside the rotary shaft tube 100 and located inside the transmission sleeve 23, with both ends of the ball sleeve 24 clamped inside both ends of the transmission sleeve 23.

[0088] Multiple balls 241 are embedded in the inner wall of the ball sleeve 24 at intervals, and the multiple balls 241 slide in contact with the rotary shaft tube 100 and the transmission sleeve 23 respectively.

[0089] In the above implementation, the arrangement of the ball sleeve 24 can reduce the friction between the rotary shaft tube 100 and the transmission sleeve 23, and reduce the wear of the transmission sleeve 23.

[0090] Optionally, the pitch feedback device further includes a first fixed hinge seat 5 and a second fixed hinge seat 6. The first fixed hinge seat 5 and the feedback rod 1 are located at one end of the transmission ring assembly 2, and the second fixed hinge seat 6 and the detection rod 3 are located at the other end of the transmission ring assembly 2. The first fixed hinge seat 5 and the feedback rod 1 are located on opposite sides of the transmission ring assembly 2, and the first fixed hinge seat 5 is connected to the rotary shaft tube 100 and is hinged to the transmission ring assembly 2 through a third hinge shaft 303.

[0091] The second fixed hinge seat 6 and the detection rod 3 are located on opposite sides of the transmission ring assembly 2. The second fixed hinge seat 6 is connected to the hull and is hinged to the transmission ring assembly 2 through the fourth hinge shaft 304.

[0092] In the above implementation, the first fixed hinge seat 5 and the second fixed hinge seat 6 are respectively hinged to the transmission ring assembly 2. Furthermore, since the transmission ring assembly 2 is simultaneously hinged to both the feedback rod 1 and the detection rod 3, when the feedback rod 1 translates relative to the rotary shaft tube 100, the transmission ring assembly 2 will swing under the connection of the second hinge shaft 302, the third hinge shaft 303, and the fourth hinge shaft 304, thereby driving the detection rod 3 to move in the opposite direction to the feedback rod 1, thus facilitating pitch detection.

[0093] Optionally, the pitch feedback device also includes a housing 7, which is connected to both the hull and the other end of the detection rod 3. The housing 7 is used to mount the detection element so as to monitor the displacement of the detection rod 3 in real time.

[0094] The following is a brief introduction to the working process of the pitch feedback device provided in the embodiments of this disclosure:

[0095] When the pitch changes, the feedback rod 1 moves up and down relative to the rotating shaft tube 100. This movement of the feedback rod 1 drives the first transmission ring 21 to rotate around the third hinge shaft 303. After the first transmission ring 21 oscillates, the first connecting member 305 moves up and down. Since part of the first connecting member 305 is located in the first limiting ring groove 201, its up-and-down movement causes the transmission sleeve 23 to move. This up-and-down movement of the transmission sleeve 23 causes the second connecting member 306 in the second limiting ring groove 202 to move. This movement of the second connecting member 306 causes the second transmission ring 22 to oscillate around the fourth hinge shaft 304, thereby moving the detection rod 3 linearly. The detection element can obtain the pitch by detecting the displacement of the detection rod 3.

[0096] During the detection process, the gap compensation component 4 applies downward pressure to the detection rod 3, which restricts the movement of the transmission ring assembly 2 and the detection rod 3 relative to the second hinge shaft 302, and also restricts the movement of the transmission ring assembly 2 and the feedback rod 1 relative to the first hinge shaft 301. This ensures that there is no axial movement between the transmission ring assembly 2 and the detection rod 3, or between the transmission ring assembly 2 and the feedback rod 1, guaranteeing that the displacement of the feedback rod 1 and the displacement of the detection rod 3 meet the quantitative relationship in real time, thereby improving the detection accuracy of the pitch.

[0097] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A pitch feedback device, characterized by, The pitch feedback device comprises a feedback rod (1), a transmission ring assembly (2), a detection rod (3) and a gap compensation assembly (4); The transmission ring assembly (2) is coaxially sleeved outside the rotating shaft tube (100) of the propeller, the feedback rod (1) and the detection rod (3) are respectively located at two ends of the transmission ring assembly (2), the feedback rod (1) is hinged with the transmission ring assembly (2) through a first hinge shaft (301), the detection rod (3) is hinged with the transmission ring assembly (2) through a second hinge shaft (302), the first hinge shaft (301) and the second hinge shaft (302) are parallel to each other and are perpendicular to the axis of the transmission ring assembly (2); The feedback rod (1) is used for being connected with the rotating shaft tube (100), the feedback rod (1) can be translated along the axis direction of the rotating shaft tube (100) relative to the rotating shaft tube (100) and can be synchronously rotated with the rotating shaft tube (100); The transmission ring assembly (2) is used for synchronously translating the detection rod (3) and the feedback rod (1), the translation direction of the detection rod (3) is opposite to or the same as the translation direction of the feedback rod (1); The gap compensation assembly (4) is connected with the detection rod (3) and is used for applying a pressure to the detection rod (3) to limit the movement of the transmission ring assembly (2) and the detection rod (3) relative to the second hinge shaft (302) and limit the movement of the transmission ring assembly (2) and the feedback rod (1) relative to the first hinge shaft (301), the direction of the pressure is the same as or opposite to the translation direction of the detection rod (3).

2. The pitch feedback device of claim 1, wherein The detection rod (3) is provided with a limiting structure (30) near the second hinge shaft (302); The gap compensation assembly (4) comprises a fixed sleeve (41) and an elastic member (42); The fixed sleeve (41) is sleeved outside the detection rod (3) and is in gap fit with the detection rod (3); The elastic member (42) is sleeved outside the detection rod (3) and one end is located in the fixed sleeve (41), both ends of the elastic member (42) are clamped between the fixed sleeve (41) and the limiting structure (30).

3. The pitch feedback device of claim 2, wherein, The gap compensation assembly (4) further comprises a guide ring (43), the guide ring (43) is coaxially located in the fixed sleeve (41) and is located at both ends of the elastic member (42) with the second hinge shaft (302), the guide ring (43) is sleeved outside the detection rod (3) and is in gap fit with the detection rod (3).

4. The pitch feedback device of any of claims 1-3, wherein, The transmission ring assembly (2) comprises a first transmission ring (21), a second transmission ring (22) and a transmission sleeve (23), the first transmission ring (21) and the second transmission ring (22) are sleeved outside two ends of the transmission sleeve (23) respectively, the first transmission ring (21) is movably connected with the transmission sleeve (23) through a first connecting piece (305), the second transmission ring (22) is movably connected with the transmission sleeve (23) through a second connecting piece (306), and the first transmission ring (21) can rotate around its own axis relative to the transmission sleeve (23) or the second transmission ring (22), wherein the first connecting piece (305) and the second connecting piece (306) are both rotating pieces, and the rotating axes of the first connecting piece (305) and the second connecting piece (306) are parallel to the first hinged shaft (301); The opposite sides of the first transmission ring (21) are hinged with the feedback rod (1) through the first hinged shaft (301) and hinged with the slewing shaft tube (100) through a third hinged shaft (303) respectively, and the opposite sides of the second transmission ring (22) are hinged with the detection rod (3) through a second hinged shaft (302) and hinged with the ship body through a fourth hinged shaft (304) respectively, the third hinged shaft (303) and the fourth hinged shaft (304) are parallel to the first hinged shaft (301).

5. The pitch feedback device of claim 4, wherein, The transmission sleeve (23) is provided with a first limiting ring groove (201) and a second limiting ring groove (202) near two ends of its own axis direction respectively, the first connecting piece (305) is movably located in the first limiting ring groove (201) partially, and the second connecting piece (306) is movably located in the second limiting ring groove (202) partially.

6. The pitch feedback device of claim 5, wherein, The first connecting piece (305) comprises two first bolt type roller bearings (3051), the two first bolt type roller bearings (3051) are coaxially located on the extension line of the first diameter of the first transmission ring (21), one end of each of the two first bolt type roller bearings (3051) is connected with the first transmission ring (21), and the other end is located in the first limiting ring groove (201), and the first bolt type roller bearing (3051) can move in the first limiting ring groove (201) along with the first transmission ring (21).

7. The pitch feedback device of claim 6, wherein The first hinged shaft (301) and the third hinged shaft (303) are located on the extension line of the second diameter of the first transmission ring (21), and the straight line where the first diameter is located is perpendicular to the straight line where the second diameter is located.

8. The pitch feedback device of claim 5, wherein, The second connecting piece (306) comprises two second bolt type roller bearings (3061) coaxially located on the extension line of the third diameter of the second transmission ring (22), and one end of each of the two second bolt type roller bearings (3061) is connected with the second transmission ring (22) and the other end is located in the second limiting ring groove (202), and the second bolt type roller bearing (3061) can move in the second limiting ring groove (202).

9. The pitch feedback device of claim 4, wherein, The transmission ring assembly (2) further comprises a ball sleeve (24) sleeved outside the rotary shaft pipe (100) and located in the transmission sleeve (23), and both ends of the ball sleeve (24) are clamped in both ends of the transmission sleeve (23). A plurality of balls (241) are embedded in the inner wall of the ball sleeve (24), and the plurality of balls (241) are in sliding contact with the rotary shaft pipe (100) and the transmission sleeve (23) respectively.

10. The pitch feedback device of claim 4, wherein, The pitch feedback device further comprises a first fixed hinge seat (5) and a second fixed hinge seat (6); The first fixed hinge seat (5) and the feedback rod (1) are located at one end of the transmission ring assembly (2), and the second fixed hinge seat (6) and the detection rod (3) are located at the other end of the transmission ring assembly (2); The first fixed hinge seat (5) and the feedback rod (1) are respectively located on opposite sides of the transmission ring assembly (2), the first fixed hinge seat (5) is connected with the rotary shaft pipe (100) and is hinged with the transmission ring assembly (2) through the third hinge shaft (303); The second fixed hinge seat (6) and the detection rod (3) are respectively located on opposite sides of the transmission ring assembly (2), the second fixed hinge seat (6) is connected with the ship body and is hinged with the transmission ring assembly (2) through the fourth hinge shaft (304).

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