Sealing structure of stabilized platform and stabilized platform

Abstract

The utility model relates to the technical field of ships, in particular to a sealing structure of a stabilized platform and the stabilized platform. The sealing structure of the stabilized platform comprises a first flange seat and a first shaft end sealing sleeve, and a first flange is installed in the first flange seat through a first bearing so as to be rotationally connected with the first flange seat; the first shaft end sealing sleeve is arranged outside the first flange in a sleeving mode, and the first sealing sleeve end face of the first shaft end sealing sleeve abuts against the first flange base end face of the first flange base. Wherein a first axial concentric-square-shaped groove is formed in the end face of the first sealing sleeve, a first axial concentric-square-shaped protrusion is arranged on the end face of the first flange seat, the first axial concentric-square-shaped groove is matched with the first axial concentric-square-shaped protrusion, and the first axial concentric-square-shaped protrusion extends into the first axial concentric-square-shaped groove. The axial concave-convex structures of the matching part of the first shaft end sealing sleeve and the first flange seat are mutually embedded, so that a labyrinth structure can be formed, corrosive gases such as salt mist and water vapor are prevented from entering, and the sealing effect on the swinging and rotating part and the bearing is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of ships, and more particularly, to a sealing structure of a stabilization platform and a stabilization platform. Background Art

[0002] The stabilization platform can be installed on the mast of a ship, the upper platform of the cockpit, etc., and is used to make devices such as antennas swing in the opposite direction when the ship is swaying, so as to maintain azimuth stability, for example, to maintain horizontal, so as to isolate the sway of the ship and avoid the axis of on-board equipment such as radar antennas from shaking, which affects the scanning and measurement of targets.

[0003] The usage environment of the stabilization platform is characterized by high air humidity and high salinity. A rolling bearing is installed at the rotating part of the swinging and rotating part of the stabilization platform relative to the fixed part. Corrosive gases such as salt mist and water vapor can easily cause the rolling bearing made of metal to rust. In addition, the accumulation of salt in the salt mist corrodes the rotating part, which may also cause an increase in the rotational damping of the swinging and rotating part of the rotating shaft of the stabilization platform, and even cause the phenomenon of rotational jamming.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The purpose of the present disclosure is to provide a sealing structure of a stabilization platform and a stabilization platform, which can improve the sealing effect on the swinging and rotating parts and bearings.

[0006] According to one aspect of the present disclosure, there is provided a sealing structure of a stabilization platform, including:

[0007] A first flange seat, the first flange is installed in the first flange seat through a first bearing to be rotatably connected to the first flange seat;

[0008] A first shaft end seal sleeve, sleeved outside the first flange, and a first seal sleeve end face of the first shaft end seal sleeve abuts against a first flange seat end face of the first flange seat;

[0009] Wherein, a first axial retaining groove is provided on the first seal sleeve end face, a first axial retaining projection is provided on the first flange seat end face, the first axial retaining groove and the first axial retaining projection are engaged with each other, and the first axial retaining projection extends into the first axial retaining groove.

[0010] In an exemplary embodiment of the present disclosure, the first axial retaining groove includes a first groove and a second groove, the first groove and the second groove are coaxial, and the second groove is provided on the outer ring of the first groove.

[0011] In an exemplary embodiment of the present disclosure, the width of the second groove is smaller than the width of the first groove.

[0012] In an exemplary embodiment of the present disclosure, the width of the first axial annular groove is greater than the width of the first axial annular protrusion.

[0013] In an exemplary embodiment of the present disclosure, the inner peripheral surface of the first seal of the first shaft end seal sleeve is circumferentially attached to the outer peripheral surface of the first flange seat of the first flange seat, and the outer peripheral surface of the first flange seat is provided with a first radial annular groove.

[0014] In an exemplary embodiment of the present disclosure, the inner peripheral surface of the first seal is a smooth annular surface.

[0015] In an exemplary embodiment of the present disclosure, the sealing structure of the stable platform further includes a second flange seat and a second shaft end seal sleeve. The second flange is installed in the second flange seat through a second bearing to be rotatably connected to the second flange seat; the end surface of the second seal of the second shaft end seal sleeve abuts against the end surface of the second flange seat of the second flange;

[0016] The end surface of the second seal is provided with a second axial annular groove, and the end surface of the second flange seat is provided with a second axial annular protrusion. The second axial annular groove and the second axial annular protrusion are engaged with each other, and the second axial annular protrusion extends into the second axial annular groove;

[0017] Wherein, the first flange seat, the first flange, the second flange seat and the second flange are coaxially arranged.

[0018] In an exemplary embodiment of the present disclosure, the sealing structure of the stable platform further includes a cross shaft sleeve and a third shaft end seal sleeve. The first connecting shaft is installed in the cross shaft sleeve through a third bearing to be rotatably connected to the cross shaft sleeve;

[0019] The third shaft end seal sleeve is sleeved outside the cross shaft sleeve, and the inner peripheral surface of the third seal of the third shaft end seal sleeve is circumferentially attached to the outer peripheral surface of the cross shaft sleeve of the cross shaft sleeve;

[0020] Wherein, the outer peripheral surface of the cross shaft sleeve is provided with a third radial annular groove.

[0021] In an exemplary embodiment of the present disclosure, the axis of the third shaft end seal sleeve is perpendicular to the axis of the first flange seat.

[0022] According to another aspect of the present disclosure, a stable platform is provided, including the sealing structure of the stable platform according to any one of the above.

[0023] The sealing structure of the stable platform and the stable platform of the present disclosure. The axial concave and convex structures at the mating part of the first shaft end seal sleeve and the first flange seat are mutually inlaid, which can form a labyrinth structure to prevent corrosive gases such as salt spray and water vapor from entering, and improve the sealing effect on the swinging and rotating components and bearings. Description of the Drawings

[0024] The accompanying drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments in line with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] For a better understanding of the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different settings as known in the art. Moreover, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0026] Figure 1 It is a longitudinal sectional view along the Y-axis of an exemplary embodiment of the stable platform of the present disclosure;

[0027] Figure 2 It is a schematic diagram of the first flange seat in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure;

[0028] Figure 3 It is a schematic diagram of the first shaft end seal sleeve in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure;

[0029] Figure 4 It is a schematic diagram of the second flange seat in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure;

[0030] Figure 5 It is a schematic diagram of the second shaft end seal sleeve in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure;

[0031] Figure 6 It is a longitudinal sectional view along the X-axis of an exemplary embodiment of the stable platform of the present disclosure;

[0032] Figure 7 It is a schematic diagram of the cross shaft sleeve in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure;

[0033] Figure 8Schematic diagram of the third shaft end seal sleeve in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure;

[0034] Figure 9 Schematic diagram of the fourth flange seat in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure;

[0035] Figure 10 Schematic diagram of the fourth shaft end seal sleeve in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure;

[0036] Figure 11 Schematic diagram of the fourth flange in an exemplary embodiment of the sealing structure of the stable platform of the present disclosure.

[0037] Explanation of the reference numerals is as follows:

[0038] 11. First flange seat; 12. First flange; 13. First bearing; 14. First shaft end seal sleeve; 15. First groove; 16. Second groove; 17. Inner peripheral surface of the first seal sleeve; 18. First flange shaft; 101. First axial return groove; 102. First axial return protrusion; 103. First radial return groove; 21. Second flange seat; 22. Second flange; 23. Second bearing; 24. Second shaft end seal sleeve; 201. Second axial return groove; 202. Second axial return protrusion; 31. Cross shaft sleeve; 32. First connecting shaft; 33. Third bearing; 34. Third shaft end seal sleeve; 35. Inner peripheral surface of the third seal sleeve; 301. Third radial return groove; 41. Fourth flange seat; 42. Second connecting shaft; 43. Fourth bearing; 44. Fourth shaft end seal sleeve; 45. Fourth flange; 46. Inner peripheral surface of the fourth seal sleeve; 47. Inner peripheral surface of the fifth seal sleeve; 401. Fourth axial return groove; 402. Fourth axial return protrusion; 403. Fourth radial return groove; 404. Fifth radial return groove; 5. Sensor. Detailed implementation manners

[0039] Next, the technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the protection scope of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the protection scope of the present disclosure.

[0040] Unless otherwise specified or stated, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings understood by persons of ordinary skill in the art to which this disclosure pertains. In this disclosure, terms such as "first" and "second" are used only as labels and do not limit the quantity, importance, or order of their objects. Words such as "including" or "comprising" are intended to indicate that the elements appearing before this word cover the elements listed after this word and their equivalents, without excluding other elements. Terms such as "connected" and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a movably connected connection, an integral connection, a detachable connection, a direct connection, or an indirect connection through an intermediate medium.

[0041] In addition, in this application, orientation terms such as "upper", "lower", "inner", and "outer" are only used to represent relative positional relationships and are described according to the positions and states in the drawings or when the stable platform actually works, and should not be understood as limiting the exemplary embodiments of this disclosure. For example, if a shaft part is installed in a hole part through a bearing, then the outer peripheral surface of the shaft part is in contact with the inner peripheral surface of the bearing, and the outer peripheral surface of the bearing is in contact with the inner peripheral surface of the hole part.

[0042] To facilitate the description of the solution of this disclosure, a possible application scenario provided by this disclosure takes the stable platform applied to a ship as an example. Of course, those skilled in the art can understand that the stable platform can also be applied to other moving carriers such as vehicles and aircraft, and provides a horizontal plane for devices such as satellite TV antennas, satellite communication antennas, meteorological cloud map receiving antennas, and observation and photography instruments that require aiming or tracking, and isolates the sway of the moving carrier.

[0043] According to one aspect of this disclosure, a sealing structure for a stable platform is provided, which can be applied to the stable platform to seal the bearings of the swinging and rotating components of the stable platform. The sealing structure of the stable platform includes a first flange seat 11 and a first shaft end seal sleeve 14. The first flange 12 is installed in the first flange seat 11 through a first bearing 13 to be rotatably connected to the first flange seat 11; the first shaft end seal sleeve 14 is sleeved outside the first flange 12, and the first seal sleeve end face of the first shaft end seal sleeve 14 abuts against the first flange seat end face of the first flange seat 11; wherein, a first axial return groove 101 is provided on the first seal sleeve end face, a first axial return protrusion 102 is provided on the first flange seat end face, the first axial return groove 101 and the first axial return protrusion 102 are aligned, and the first axial return protrusion 102 extends into the first axial return groove 101.

[0044] Specifically, refer to Figure 1Schematic diagram of the shown stable platform and the sealing structure of the stable platform. Exemplarily, a two-dimensional stable platform (biaxial stable platform) is provided, which can swing in the opposite direction through two orthogonal swing axes (hereinafter referred to as the X-axis and the Y-axis respectively) when the hull sways, so as to overcome the influence of hull pitching and rolling and provide an approximately horizontal working platform.

[0045] For example, the X-axis and the Y-axis of the stable platform are placed horizontally. The X-axis is parallel to the ship's rib surface (cross-section), and the Y-axis is parallel to the bow-stern line (ship's center line). It can be used to isolate the longitudinal and transverse swing movements of the ship and simulate the local horizontal plane. The platform body of the stable platform can be used to place the object to be stabilized, such as a radar antenna, etc. The stable platform may also include an attitude measurement sensor 5, longitudinal and transverse rolling moment motors, and a control system, etc. When the stable platform is working, when the hull sways and the attitude angle changes, the longitudinal and transverse rolling angles of the hull can be measured in real time through the attitude measurement sensor 5, and the longitudinal rolling motor and the transverse rolling motor are driven to act in the opposite direction to achieve the horizontal direction stability of the mechanical structure of the stable platform. The basic structure and working principle of the stable platform will not be elaborated here.

[0046] Reference Figure 1 Longitudinal sectional view of the shown stable platform along the Y-axis. The first flange 12 is installed in the first flange seat 11 through the first bearing 13. For example, the first flange 12, the first bearing 13 and the first flange seat 11 are arranged along the Y-axis direction. The first flange 12 is sleeved outside the first flange shaft 18 on the left side of the Y-axis and can rotate synchronously with the first flange shaft 18. The outer peripheral surface of the first flange 12 is in contact with the inner ring of the first bearing 13, and the outer ring of the first bearing 13 is installed in the inner hole of the first flange seat 11. The rotational connection between the first flange 12, the swing rotation component of the Y-axis, and the fixed component first flange seat 11 is realized through the first bearing 13. The first bearing 13 can be a rolling bearing, such as a deep groove ball bearing, a needle bearing, a self-aligning ball bearing, etc.

[0047] The first shaft end seal sleeve 14 is sleeved outside the first flange 12. Reference Figure 1 As shown, the end face of the first shaft end seal sleeve 14 away from the center of the stable platform (the left end face of the first shaft end seal sleeve 14 in the figure) is the first seal sleeve end face, and the end face of the first flange seat 11 close to the center of the stable platform (the right end face of the first flange seat 11 in the figure) is the first flange seat end face. The first seal sleeve end face abuts against the first flange seat end face, and the first axial return groove 101 on the first seal sleeve end face is aligned with the first axial return protrusion 102 on the first flange seat end face. The axial concave-convex structures of the mating parts of the first shaft end seal sleeve 14 and the first flange seat 11 are mutually embedded, which can form a labyrinth structure to prevent corrosive gases such as salt mist and water vapor from entering and improve the sealing effect on the swing rotation component and the bearing.

[0048] Those skilled in the art can understand that in some exemplary embodiments of the present disclosure, the first flange 12, the first bearing 13 and the first flange seat 11 may also be arranged along the X-axis direction. For example, the first flange 12 is sleeved outside the flange shaft on the left or right side of the X-axis and rotates synchronously with the flange shaft. Such a transformation will not affect the implementation of the present disclosure solution.

[0049] In an exemplary embodiment of the present disclosure, both the first axial return groove 101 and the first axial return protrusion 102 may be a meandering concave-convex structure, that is, the first axial return groove 101 may include grooves and protrusions, and the first axial return protrusion 102 may also include grooves and protrusions. As long as the grooves of one correspond to the protrusions of the other and can be mutually embedded and matched to form a meandering labyrinth structure.

[0050] Reference Figure 3 The schematic diagram of the first shaft end seal sleeve 14 shown. In an exemplary embodiment of the present disclosure, the first axial return groove 101 includes a first groove 15 and a second groove 16. The first groove 15 and the second groove 16 are coaxial, and the second groove 16 is provided on the outer ring of the first groove 15. Exemplarily, the width of the second groove 16 is less than the width of the first groove 15. Exemplarily, the first axial return groove 101 further includes a third groove. The first groove 15, the second groove 16 and the third groove are coaxially arranged from the inside to the outside, and the distances between the first groove 15, the second groove 16 and the third groove may be equal. The width of the second groove 16 is less than the width of the first groove 15, and the width of the second groove 16 is less than the width of the third groove, that is, the width of the second groove 16 is the smallest.

[0051] In an exemplary embodiment of the present disclosure, reference Figure 2 The schematic diagram of the first flange seat 11 shown. The width of the first axial return groove 101 is greater than the width of the first axial return protrusion 102. Exemplarily, the first axial return groove 101 may include a plurality of groove structures, and the first axial return protrusion 102 includes a plurality of corresponding protrusion structures. The widths of some or all of the groove structures of the first axial return groove 101 are greater than the widths of the corresponding protrusion structures of the first axial return protrusion 102. For example, the first axial return groove 101 may include a first groove 15 and a second groove 16, and the first axial return protrusion 102 may include a first protrusion corresponding to the first groove 15 and a second protrusion corresponding to the second groove 16. In one embodiment, the width of the first groove 15 is greater than the width of the first protrusion, and the width of the second groove 16 is greater than the width of the second protrusion, that is, the first axial return groove 101 and the first axial return protrusion 102 are in clearance fit.

[0052] In an exemplary embodiment of the present disclosure, after the first shaft end sealing sleeve 14 and the first flange seat 11 are assembled and the end face of the first sealing sleeve is matched with the end face of the first flange seat, the protrusion structure of the first axial meandering protrusion 102 has a gap both on the outside and inside of the groove structure of the first axial meandering groove 101. That is, the protrusion structure of the first axial meandering protrusion 102, which is away from the axis and the side close to the axis, does not contact the side wall of the groove structure of the first axial meandering groove 101.

[0053] Exemplarily, low-temperature grease is applied between the end face of the first sealing sleeve and the end face of the first flange seat. Specifically, the low-temperature grease is located between the labyrinth structure formed by the first axial meandering groove 101 and the first axial meandering protrusion 102, thereby enhancing the sealing effect on the swinging rotating parts and bearings.

[0054] Exemplarily, the first flange seat 11 may be made of a metal material, for example, a titanium alloy, such as a TC4 titanium alloy material, and the material of the first shaft end sealing sleeve 14 may include nylon 1010 or polytetrafluoroethylene, etc. In addition, the housing, flange parts (such as the first flange 12, the second flange 22, etc.) and shaft parts (such as the first flange shaft 18, the first connecting shaft 32, etc.) of the stabilizing platform may also include a titanium alloy, such as a TC4 titanium alloy material.

[0055] In an exemplary embodiment of the present disclosure, the first sealing sleeve inner circumference 17 of the first shaft end sealing sleeve 14 is circumferentially attached to the first flange seat outer circumference of the first flange seat 11, and the first flange seat outer circumference is provided with a first radial serpentine groove 103. Figure 1 , Figure 2 as well as Figure 3 As shown, the first sealing sleeve inner circumference 17 of the first shaft end sealing sleeve 14 is covered outside the first flange seat outer circumference surface of the first flange seat 11, and the first flange seat outer circumference is provided with a first radial meandering groove 103, and the first radial meandering groove 103 can be a meandering concave-convex structure, that is, the first radial meandering groove 103 can include a groove and a protrusion.

[0056] Exemplarily, in an exemplary embodiment of the present disclosure, the inner circumferential surface 17 of the first sealing sleeve also includes a first radial zigzag protrusion matching the first radial zigzag groove 103, the first radial zigzag groove 103 and the first radial zigzag protrusion are relative to each other, the groove of one and the protrusion of the other correspond to each other, and are inlaid and matched with each other to form a maze structure, which prevents corrosive gases such as salt spray and water vapor from entering, and improves the sealing effect of the swinging rotating parts and bearings.

[0057] In another exemplary embodiment of the present disclosure, the inner circumferential surface 17 of the first sealing sleeve is a smooth annular surface. The smooth inner circumferential surface 17 of the first sealing sleeve matches the first radial return groove 103 on the outer circumferential surface of the first flange seat. Exemplarily, the first shaft end sealing sleeve 14 may include nylon 1010 or polytetrafluoroethylene. The first shaft end sealing sleeve 14 may include a material with certain elasticity. After the first shaft end sealing sleeve 14 is tightly assembled with the first flange seat 11, the inner circumferential surface 17 of the first sealing sleeve undergoes a slight deformation and adapts to the first radial return groove 103, which can also improve the sealing effect.

[0058] In an exemplary embodiment of the present disclosure, the sealing structure of the stable platform further includes a second flange seat 21 and a second shaft end sealing sleeve 24. Refer to Figure 1 As shown, the second flange 22 is installed in the second flange seat 21 through the second bearing 23 to be rotatably connected to the second flange seat 21; the second sealing sleeve end surface of the second shaft end sealing sleeve 24 abuts against the second flange seat end surface of the second flange seat 21; a second axial return groove 201 is provided on the second sealing sleeve end surface, and a second axial return protrusion 202 is provided on the second flange seat end surface. The second axial return groove 201 and the second axial return protrusion 202 are aligned, and the second axial return protrusion 202 extends into the second axial return groove 201; wherein, the first flange seat 11, the first flange 12, the second flange seat 21, and the second flange 22 are coaxially arranged.

[0059] Specifically, refer to Figure 1 As shown, the second flange seat 21, the second flange 22, and the second shaft end sealing sleeve 24 may be provided at the other end of the Y axis of the stable platform. The axial concave-convex structures at the mating part of the second shaft end sealing sleeve 24 and the second flange seat 21 are mutually inlaid, which can form a labyrinth structure to prevent corrosive gases such as salt mist and water vapor from entering, and improve the sealing effect on the swinging and rotating components and bearings. Refer to Figure 4 The schematic diagram of the second flange seat 21 is shown. Refer to Figure 5 The schematic diagram of the second shaft end sealing sleeve 24 is shown.

[0060] It should be noted that the "flange" described in the present disclosure refers to an input or output part that is coaxial with the rotating shaft and can rotate synchronously to transmit torque. In actual use, the first flange 12 and the second flange 22 can be either flange disk parts sleeved on the flange shaft or the flange shaft itself. For example, in an exemplary embodiment of the present disclosure, refer to Figure 1 As shown, the first flange 12 is sleeved outside the first flange shaft 18 on the left side of the Y axis and can rotate synchronously with the first flange shaft 18; the second flange 22 can be the connecting shaft body on the right side of the Y axis, and such a change will not affect the sealing structure of the second flange seat 21 and the second shaft end sealing sleeve 24.

[0061] Exemplarily, as can be understood by those skilled in the art, in some exemplary embodiments of the present disclosure, the first flange 12, the first bearing 13, and the first flange seat 11 may also be arranged along the X-axis direction, and the second flange seat 21, the second flange 22, and the second shaft end seal sleeve 24 may also be arranged along the X-axis direction. For example, the first flange 12 is sleeved outside the flange shaft on the left side of the X-axis and rotates synchronously with the flange shaft; the second flange 22 is the connecting shaft body on the right side of the X-axis.

[0062] In an exemplary embodiment of the present disclosure, both the second axial return groove 201 and the second axial return protrusion 202 may be a meandering concave-convex structure, that is, the second axial return groove 201 may include grooves and protrusions, and the second axial return protrusion 202 may also include grooves and protrusions. As long as the grooves of one correspond to the protrusions of the other and can be mutually embedded and matched to form a meandering labyrinth structure. Exemplarily, a low-temperature grease is applied between the end face of the second seal sleeve and the end face of the second flange seat. Specifically, the low-temperature grease is located between the meandering labyrinth structure formed by the second axial return groove 201 and the second axial return protrusion 202, enhancing the sealing effect on the swinging and rotating components and bearings.

[0063] In an exemplary embodiment of the present disclosure, the structures of the second flange seat 21, the second flange 22, the second bearing 23, and the second shaft end seal sleeve 24 may be symmetrically arranged with those of the first flange seat 11, the first flange 12, the first bearing 13, and the first shaft end seal sleeve 14.

[0064] In an exemplary embodiment of the present disclosure, the sealing structure of the stable platform further includes a cross-axis sleeve 31 and a third shaft end seal sleeve 34. The first connecting shaft 32 is installed in the cross-axis sleeve 31 through a third bearing 33 to be rotatably connected with the cross-axis sleeve 31; the third shaft end seal sleeve 34 is sleeved outside the cross-axis sleeve 31, and the inner peripheral surface 35 of the third seal of the third shaft end seal sleeve 34 is circumferentially attached to the outer peripheral surface of the cross-axis sleeve of the cross-axis sleeve 31; wherein, a third radial return groove 301 is provided on the outer peripheral surface of the cross-axis sleeve.

[0065] In an exemplary embodiment of the present disclosure, Figure 6 shows a longitudinal sectional view of the stable platform along the X-axis. Refer to Figure 7 shows a schematic diagram of a cross-axis sleeve 31, Figure 8 shows a schematic diagram of a third shaft end seal sleeve 34. The third shaft end seal sleeve 34 is arranged along the X-axis direction, and the axis of the third shaft end seal sleeve 34 is perpendicular to that of the first flange seat 11. Exemplarily, the inner peripheral surface 35 of the third seal of the third shaft end seal sleeve 34 covers the outer peripheral surface of the cross-axis sleeve of the cross-axis sleeve 31, and the third radial return groove 301 may be a meandering concave-convex structure, that is, the first radial return groove 103 may include grooves and protrusions.

[0066] In an exemplary embodiment of the present disclosure, the inner peripheral surface 35 of the third seal sleeve also includes a third radial loop-shaped protrusion that matches the third radial loop-shaped groove 301. The third radial loop-shaped groove 301 and the third radial loop-shaped protrusion are in alignment, with the groove of one corresponding to the protrusion of the other, and they are mutually inlaid and matched, forming a labyrinth structure to prevent corrosive gases such as salt spray and water vapor from entering, thereby enhancing the sealing effect on the swinging and rotating components and bearings.

[0067] In another exemplary embodiment of the present disclosure, the inner peripheral surface 35 of the third seal sleeve is a smooth annular surface. The smooth inner peripheral surface 35 of the third seal sleeve matches the third radial loop-shaped groove 301 on the outer peripheral surface of the cross shaft sleeve. Exemplarily, the third shaft end seal sleeve 34 may include nylon 1010 or polytetrafluoroethylene. When the third shaft end seal sleeve 34 is tightly assembled with the cross shaft sleeve 31, the inner peripheral surface 35 of the third seal sleeve undergoes slight deformation to adapt to the third radial loop-shaped groove 301, which can also play a role in enhancing the sealing effect.

[0068] In an exemplary embodiment of the present disclosure, the sealing structure of the stable platform further includes a fourth flange seat 41 and a fourth shaft end seal sleeve 44. Refer to Figure 6 As shown, the second connecting shaft 42 is installed in the fourth flange seat 41 through a fourth bearing 43 to be rotatably connected to the fourth flange seat 41; the fourth seal sleeve end face of the fourth shaft end seal sleeve 44 abuts against the fourth flange seat end face of the fourth flange seat 41; a fourth axial loop-shaped groove 401 is provided on the fourth seal sleeve end face, and a fourth axial loop-shaped protrusion 402 is provided on the fourth flange seat end face. The fourth axial loop-shaped groove 401 and the fourth axial loop-shaped protrusion 402 are in alignment, and the fourth axial loop-shaped protrusion 402 extends into the fourth axial loop-shaped groove 401. Among them, the fourth flange seat 41 and the fourth shaft end seal sleeve 44 are coaxially arranged with the third shaft end seal sleeve 34.

[0069] In an exemplary embodiment of the present disclosure, the structure of the fourth axial loop-shaped groove 401 and the fourth axial loop-shaped protrusion 402 may refer to the structure of the first axial loop-shaped groove 101 and the first axial loop-shaped protrusion 102, which will not be elaborated here.

[0070] In an exemplary embodiment of the present disclosure, refer to Figure 6 and Figure 9 the schematic diagram of the fourth flange seat 41 shown, Figure 10 the schematic diagram of the fourth shaft end seal sleeve 44 shown. The inner peripheral surface 46 of the fourth seal of the fourth shaft end seal sleeve 44 is circumferentially attached to the outer peripheral surface of the fourth flange seat of the fourth flange seat 41, and a fourth radial loop-shaped groove 403 is provided on the outer peripheral surface of the fourth flange seat. The fourth radial loop-shaped groove 403 may be a loop-shaped concave-convex structure, that is, the fourth radial loop-shaped groove 403 may include grooves and protrusions.

[0071] In an exemplary embodiment of the present disclosure, the fourth flange 45 is sleeved outside the second connecting shaft 42 and can rotate synchronously with the second connecting shaft 42. For example Figure 6 and Figure 11 As shown in the schematic diagram of the fourth flange 45, the fourth flange 45 is sleeved outside the second connecting shaft 42 at the right end of the X-axis. The fourth shaft-end seal sleeve 44 also has an inner peripheral surface 47 of the fifth seal sleeve, and the inner peripheral surface 47 of the fifth seal sleeve is circumferentially attached outside the outer peripheral surface of the fourth flange 45 of the fourth flange 45. The outer peripheral surface of the fourth flange is provided with a fifth radial return groove 404. The fifth radial return groove 404 can be a meandering concave-convex structure, that is, it can include grooves and protrusions.

[0072] In the above embodiment, the fourth shaft-end seal sleeve 44 has both the inner peripheral surface 46 of the fourth seal sleeve and the inner peripheral surface 47 of the fifth seal sleeve, which are respectively attached to the outer peripheral surface of the fourth flange seat 41 and the outer peripheral surface of the fourth flange 45 of the fourth flange. That is, at the shaft end provided with the fourth shaft-end seal sleeve 44, two sets of radial return groove structures can be provided, further improving the sealing effect on the fourth bearing 43.

[0073] Those skilled in the art can understand that in some exemplary embodiments of the present disclosure, the third shaft-end seal sleeve 34 and the fourth shaft-end seal sleeve 44 can also be arranged along the Y-axis direction, and the first flange 12 and the second flange 22 can be arranged along the X-axis direction. Such a transformation will not affect the implementation of the present disclosure solution.

[0074] According to another aspect of the present disclosure, a stabilized platform is further provided, including the sealing structure of the stabilized platform in any of the above exemplary embodiments and possible combinations. For the basic structure and principle of the stabilized platform, please refer to the foregoing description of the present disclosure and the structure of the stabilized platform in the prior art, which will not be elaborated herein.

[0075] In an exemplary embodiment of the present disclosure, the stabilized platform can be a single-axis, double-axis or triple-axis stabilized platform, including one swing axis (X-axis), two orthogonal swing axes (X-axis, Y-axis) and three pairwise orthogonal swing axes (X-axis, Y-axis, Z-axis) respectively. The sealing structure provided by the exemplary embodiment of the present disclosure can be applied to the end of the swing axis of the stabilized platform, thereby improving the sealing effect on the swing rotating components and bearings.

[0076] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include well-known knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0077] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The protection scope of the present disclosure is only limited by the appended claims.

Claims

1. A sealing structure for a stable platform, characterized in that: include: A first flange seat (11), wherein a first flange (12) is installed in the first flange seat (11) via a first bearing (13) so as to be rotatably connected to the first flange seat (11); A first shaft end sealing sleeve (14) is sleeved outside the first flange (12), and a first sealing sleeve end surface of the first shaft end sealing sleeve (14) is in contact with a first flange seat end surface of the first flange seat (11); The first sealing sleeve end surface is provided with a first axial return groove (101), the first flange seat end surface is provided with a first axial return protrusion (102), the first axial return groove (101) and the first axial return protrusion (102) are aligned with each other, and the first axial return protrusion (102) extends into the first axial return groove (101).

2. The sealing structure of the stable platform according to claim 1, characterized in that: The first axial circular groove (101) comprises a first groove (15) and a second groove (16); the first groove (15) and the second groove (16) are coaxial, and the second groove (16) is arranged on the outer ring of the first groove (15).

3. The sealing structure of the stable platform according to claim 2, characterized in that: The width of the second groove (16) is smaller than the width of the first groove (15).

4. The sealing structure of the stable platform according to claim 1, characterized in that: The width of the first axial meandering groove (101) is greater than the width of the first axial meandering protrusion (102).

5. The sealing structure of the stable platform according to claim 1, characterized in that: The first sealing sleeve inner circumferential surface (17) of the first shaft end sealing sleeve (14) is circumferentially attached to the outside of the first flange seat outer circumferential surface of the first flange seat (11), and the first flange seat outer circumferential surface is provided with a first radial circular groove (103).

6. The sealing structure of the stable platform according to claim 5, characterized in that: The inner peripheral surface (17) of the first sealing sleeve is a smooth annular surface.

7. The sealing structure of the stable platform according to claim 1, characterized in that: The sealing structure of the stabilizing platform further comprises a second flange seat (21) and a second shaft end sealing sleeve (24); the second flange (22) is installed in the second flange seat (21) via a second bearing (23) so as to be rotatably connected to the second flange seat (21); the second sealing sleeve end face of the second shaft end sealing sleeve (24) is in contact with the second flange seat end face of the second flange (22); The second sealing sleeve end surface is provided with a second axial return groove (201), the second flange seat end surface is provided with a second axial return protrusion (202), the second axial return groove (201) and the second axial return protrusion (202) are relatively matched, and the second axial return protrusion (202) extends into the second axial return groove (201); Wherein, the first flange seat (11) and the first flange (12) are coaxially arranged with the second flange seat (21) and the second flange (22).

8. The sealing structure of the stable platform according to claim 1, characterized in that: The sealing structure of the stabilizing platform further comprises a cross shaft sleeve (31) and a third shaft end sealing sleeve (34); the first connecting shaft (32) is installed in the cross shaft sleeve (31) via a third bearing (33) so as to be rotatably connected to the cross shaft sleeve (31); The third shaft end sealing sleeve (34) is sleeved outside the cross shaft sleeve (31), and the third sealing sleeve inner circumferential surface (35) of the third shaft end sealing sleeve (34) is circumferentially attached to the outer circumferential surface of the cross shaft sleeve (31); Wherein, the outer peripheral surface of the cross shaft sleeve is provided with a third radial circular groove (301).

9. The sealing structure of the stable platform according to claim 8, characterized in that: The third shaft end sealing sleeve (34) is perpendicular to the axis of the first flange seat (11).

10. A stable platform, characterized in that: A sealing structure comprising the stable platform according to any one of claims 1 to 9.

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