A seawater-proof external driving device

Abstract

The application discloses a kind of external drive devices of preventing seawater, including left gland, right gland, left end cover, right end cover, ejector rod and shell;Left end cover and right end cover are respectively fixedly connected at the left end and right end of shell;The rod-like portion of ejector rod sequentially passes through left end cover and right end cover, and the cylindrical portion is between the outer surface of left end cover and the inner surface of shell;Ejector rod and end cover are sealed by packing gland and gasket, and left gland and right gland are used to compress packing gland;Second oil cavity is formed between left end cover and the inner surface of cylindrical portion, and first oil cavity is formed between right end cover, the outer surface of cylindrical portion and shell;Ejector rod carries out linear extension and contraction relative to shell under the pressure difference of first oil cavity and second oil cavity.The application further discloses anti-fouling mechanism, in-place feedback structure and in-place buffer mechanism.The application can realize long-term stable driving in outboard seawater environment.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of ship underwater technology and relates to a seawater-proof external driving device. BACKGROUND

[0002] In the field of ship underwater technology, in order to ensure the safety and reliability of the ship, the driving device is mainly placed in the hull and connected with external equipment through a transmission mechanism and a cabin sealing to avoid direct contact of the driving device with seawater. With the development of modern ship equipment, the driving device placed in the hull cannot meet the requirements.

[0003] The driving device placed outside the hull is soaked in seawater for a long time and is affected by marine attachments and seawater pressure. The marine attachments can cause the driving device to be stuck, and once seawater enters the driving device, the driving device will be out of order. Therefore, preventing the generation of marine attachments and seawater sealing are key technologies for placing the driving device outside the hull. SUMMARY

[0004] The application aims to overcome the above-mentioned defects and provide a seawater-proof external driving device, which solves the technical problem that the driving device in the prior art is difficult to be applied to the seawater environment outside the hull. The application can realize long-term stable driving in the seawater environment outside the hull.

[0005] To achieve the above-mentioned application purposes, the application provides the following technical scheme.

[0006] A seawater-proof external driving device comprises a left gland, a right gland, a left end cover, a right end cover, a top rod and a shell.

[0007] The shell is a cylindrical structure with both ends open.

[0008] The left end cover and the right end cover are fixedly connected to the left end and the right end of the shell, respectively.

[0009] The top rod comprises a rod-shaped part and a cylindrical part outside the rod-shaped part. The cylindrical part is coaxial with the rod-shaped part and is connected as a whole. The rod-shaped part passes through the left end cover and the right end cover in sequence. The cylindrical part is located between the outer surface of the left end cover and the inner surface of the shell, and the cylindrical part is in clearance fit with the shell. The rod-shaped part of the top rod and the left end cover are sealed by a first packing gland and a first gasket. The rod-shaped part of the top rod and the right end cover are sealed by a second packing gland and a second gasket. The rod-shaped part of the top rod and the left end cover are sealed by a first packing gland and a first gasket. The first packing gland is filled in the stepped hole of the left end cover, and the first packing gland is pressed from the left end by the left gland. The second packing gland is filled in the stepped hole of the right end cover, and the second packing gland is pressed from the right end by the right gland. The left gland is fixedly connected to the left end cover, and the right gland is fixedly connected to the right end cover.

[0010] The second oil cavity is formed between the left end cover and the inner surface of the cylindrical part, and the first oil cavity is formed between the right end cover, the outer surface of the cylindrical part and the inner surface of the shell; the ejector rod performs linear extension and retraction relative to the shell under the pressure difference between the first oil cavity and the second oil cavity, and the movement of the ejector rod realizes the driving of the external equipment.

[0011] Further, the third gasket is used to seal between the left end cover and the cylindrical part of the ejector rod.

[0012] Further, the left end cover and the right end cover are both cylindrical structures with one end open, the open end of the left end cover faces the outside of the shell, the open end of the left end cover is fixedly connected with the left end of the shell, the open end of the right end cover faces the outside of the shell, and the open end of the right end cover is fixedly connected with the right end of the shell.

[0013] The first O-shaped sealing ring is arranged between the open end of the left end cover and the left end of the shell, and between the open end of the right end cover and the right end of the shell.

[0014] Further, the first packing gland is located on the left side of the first gasket, and the second packing gland is located on the right side of the second gasket.

[0015] The distance between the left end surface of the first packing gland and the left end surface of the first gasket is equal to the distance between the right end surface of the second packing gland and the right end surface of the second gasket, and is set as L1, L1 is greater than the stroke L of the ejector rod.

[0016] Further, the shell is provided with a first oil cavity passage and a second oil cavity passage, and the left end cover is provided with an oil passage hole.

[0017] The first oil cavity passage is in communication with the first oil cavity, and is used for the hydraulic oil in and out of the first oil cavity.

[0018] The second oil cavity passage is in communication with one end of the oil passage hole of the left end cover, the other end of the oil passage hole is in communication with the second oil cavity, and the second oil cavity passage and the oil passage hole are used for the hydraulic oil in and out of the second oil cavity.

[0019] The second O-shaped sealing ring is used to seal the communication between the second oil cavity passage and the oil passage hole.

[0020] Further, the outer surface of the cylindrical portion of the ejector rod is provided with a first boss matched with the gap of the shell, the inner surface of the shell is provided with a second boss, the second boss is located at the left side of the first boss, the left end of the right end cover is provided with a fifth boss, the fifth boss is located at the right side of the first boss, during the left movement of the ejector rod, a to-position buffer cavity is formed between the right end surface of the second boss and the left end surface of the first boss, the to-position buffer cavity is used for to-position buffering of the movement of the ejector rod, when the ejector rod moves to the left position, the right end surface of the second boss and the left end surface of the first boss are in contact to realize limiting, during the right movement of the ejector rod, a to-position buffer cavity is formed between the left end surface of the fifth boss and the right end surface of the first boss, the to-position buffer cavity is used for to-position buffering of the movement of the ejector rod, when the ejector rod moves to the right position, the left end surface of the fifth boss and the right end surface of the first boss are in contact to realize limiting.

[0021] Further, the above-mentioned seawater-proof external driving device further comprises a to-position feedback structure.

[0022] The outer surface of the cylindrical portion of the ejector rod is provided with a third boss and a fourth boss, the third boss is located at the left side of the first boss, and the fourth boss is located at the left side of the third boss; when the ejector rod moves to the left position, the third boss triggers the to-position feedback structure, when the ejector rod moves to the right position, the fourth boss triggers the to-position feedback structure, and when the to-position feedback structure is triggered, a to-position signal is output to an external device.

[0023] Further, the to-position feedback structure comprises a feedback shell, a centering spring, a slide rod, a shift fork, a watertight socket and a micro switch.

[0024] The feedback shell is fixedly installed outside the shell, the slide rod is fixedly installed inside the feedback shell, the axis of the slide rod is parallel to the axis of the shell, the shell is provided with a shift fork mounting hole, the first end of the shift fork is fixedly connected to the slide rod, the second end of the shift fork extends into the shell through the shift fork mounting hole, when the ejector rod moves to the left position, the third boss pushes the second end of the shift fork to the left, thereby driving the slide rod to move to the left to trigger the micro switch, when the ejector rod moves to the right position, the fourth boss pushes the second end of the shift fork to the right, thereby driving the slide rod to move to the right to trigger the micro switch, and when the micro switch is triggered, a to-position signal is output to an external device through the watertight socket.

[0025] One end of the centering spring is fixed to the feedback shell, and the other end is connected to the slide rod, the centering spring is used to reset the slide rod to separate from the micro switch after the third boss or the fourth boss separates from the second end of the shift fork, and the micro switch is reset.

[0026] Further, the above-mentioned seawater-proof external driving device further comprises an anti-fouling mechanism.

[0027] The anti-fouling mechanism comprises anti-fouling covers, the anti-fouling covers comprise left and right anti-fouling covers, the left and right anti-fouling covers are arranged outside the left and right ends of the shell respectively, the left and right ends of the top rod pass through the left and right anti-fouling covers respectively, and the left and right anti-fouling covers are fixedly connected with the left and right ends of the top rod respectively;

[0028] The anti-fouling cover is in clearance fit with the shell, the top rod drives the anti-fouling cover to move relative to the shell, seawater enters or is discharged from the anti-fouling cover through the clearance between the anti-fouling cover and the shell, and the shell surface is washed.

[0029] Further, the edges of the anti-fouling cover and the shell fit are provided as acute angles, and the edges provided as acute angles are used for scraping marine attachments on the shell when the anti-fouling cover moves relative to the shell.

[0030] Compared with the prior art, the present application has the following beneficial effects:

[0031] (1) The present application creatively proposes an anti-seawater external driving device, a pressure difference formed by two oil chambers is used to realize driving output, and a sealing structure is used to realize anti-seawater dynamic sealing, so that the present application realizes long-term stable driving of the device in an outboard seawater environment;

[0032] (2) The present application designs an anti-fouling structure according to the complexity of the seawater environment, marine attachments can be effectively avoided, and the service life of the driving mechanism of the present application is prolonged;

[0033] (3) The present application realizes the in-place buffering function of the top rod through the in-place buffering mechanism, avoids damage between components, and is beneficial to prolonging the service life of the driving mechanism of the present application;

[0034] (4) The present application realizes the in-place position feedback of the switch through the in-place feedback mechanism, improves the controllability of the driving device, and is beneficial to timely discovering and eliminating bad conditions. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structural diagram of an anti-seawater external driving device of the present application;

[0036] Figure 2 It is a schematic diagram of an anti-seawater sealing structure of the present application;

[0037] Figure 3 It is a schematic diagram of an anti-fouling structure of the present application;

[0038] Figure 4 It is a schematic diagram of an in-place buffering of the present application;

[0039] Figure 5 It is a schematic diagram of an in-place feedback structure of the present application, wherein (a) is a structural schematic diagram, (b) is a sectional view of (a) in the A-A direction, and (c) is an equivalent principle diagram.

[0040] In the figure, 1 - anti-fouling cover; 2 - left gland; 3 - left end cover; 4 - in-place feedback mechanism; 5 - top rod; 6 - shell; 7 - right end cover; 8 - right gland; 9 - first screw; 10 - second screw; 11 - second O-ring; 12 - first O-ring; 13 - third gasket; 14 - first packing; 15 - first gasket; 16 - nut; 17 - feedback shell; 18 - centering spring; 19 - slide rod; 20 - yoke; 21 - water-tight socket; 22 - micro switch; 23 - back nut; 31 - oil passage; 51 - first boss; 61 - second boss; 62 - fifth boss; 52 - third boss; 53 - fourth boss; a - second oil cavity; b - first oil cavity. DETAILED DESCRIPTION

[0041] The features and advantages of the present application will become more apparent from the detailed description in conjunction with the accompanying drawings.

[0042] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Unless specifically stated otherwise, the drawings are not drawn to scale and the depiction of certain acts or events within those drawings is not meant to imply that they occur in sequence or that they are the only acts or events which may occur.

[0043] The present application provides a sea water external drive device which can be placed in sea water for a long time and can work reliably in sea water for a long time. The present application adopts a unique sea water sealing structure to be placed in sea water for a long time, adopts an anti-fouling structure to prevent marine organisms from adhering, adopts a buffer structure to realize in-place hydraulic buffering by throttling effect, adopts a unique in-place feedback structure to realize reliable operation in sea water and feedback of in-place information, and adopts a reasonable layout to optimize the overall structure.

[0044] The present application will be described in detail below with reference to the accompanying drawings. Figures 1 to 5 The present application will be described in detail below with reference to the accompanying drawings.

[0045] In a preferred embodiment, the structure of the sea water external drive device of the present application is shown in the accompanying drawings, mainly comprising a shell 6, a top rod 5, an anti-fouling cover 1, a left gland 2, a right gland 8, a left end cover 3, a right end cover 7, an in-place feedback mechanism 4, a first packing 14, a first gasket 15, a second packing, a second gasket, a third gasket 13, a second O-ring 11, and a first O-ring 12. Figure 1 The shell 6 is a cylindrical structure with both ends open.

[0046] The left end cover 3 and the right end cover 7 are fixedly connected to the left end and the right end of the shell 6 by the first screw 9, respectively, and are located inside the shell 6.

[0047] The left end cover 3 and the right end cover 7 are fixedly connected to the left end and the right end of the shell 6 by the first screw 9, respectively, and are located inside the shell 6.

[0048] The top rod 5 comprises a rod-shaped portion and a cylindrical portion outside the rod-shaped portion, the cylindrical portion is coaxial with the rod-shaped portion and is welded (or connected) as a whole; the rod-shaped portion passes through the left end cover 3 and the right end cover 7 in turn, the cylindrical portion comprises a bottom surface and a side surface, wherein the bottom surface is connected to the rod-shaped portion vertically, and the side surface is located between the outer surface of the left end cover 3 and the inner surface of the shell 6, that is, the rod-shaped portion of the top rod 5, the left end cover 3, the cylindrical portion of the top rod 5 and the shell 6 are sequentially arranged from inside to outside, the cylindrical portion is in clearance fit with the shell 6, there is a through hole on the step of the cylindrical portion to avoid hindering the movement of the top rod 5; the rod-shaped portion of the top rod 5 and the left end cover 3 are sealed by the first packing box 14 and the first gasket 15, and the rod-shaped portion of the top rod 5 and the right end cover 7 are sealed by the second packing box and the second gasket; the right end of the first packing box is limited by the limiting step provided on the left end cover 3, and the left pressing cover 2 presses the left end of the first packing box, the left pressing cover 2 and the left end cover 3 are fixedly connected by the second screw 10, the left end of the second packing box is limited by the limiting step provided on the right end cover 7, and the right pressing cover 8 presses the right end of the second packing box, and the right pressing cover 8 is fixedly connected with the right end cover 7;

[0049] The first oil cavity b is formed between the outer surface of the cylindrical portion of the top rod 5, the right end cover 7 and the inner surface of the shell 6, and the second oil cavity a is formed between the inner surface of the cylindrical portion of the top rod 5 and the right end of the left end cover 3, specifically, the pressure difference of the hydraulic oil on both sides of the bottom surface of the cylindrical portion drives the extension and retraction movement of the top rod 5.

[0050] The shell 6 is provided with a first oil cavity passage and a second oil cavity passage, and the left end cover 3 is provided with an oil passage hole 31;

[0051] The first oil cavity passage communicates with the first oil cavity, and is used for the hydraulic oil in the first oil cavity to enter and exit, the outlet of the first oil cavity passage is the oil port B in the Figure 1 .

[0052] The second oil cavity passage communicates with one end of the oil passage hole 31 provided on the left end cover 3, and the other end of the oil passage hole 31 communicates with the second oil cavity, and the second oil cavity passage and the oil passage hole 31 are used for the hydraulic oil in the second oil cavity to enter and exit; the oil passage hole 31 is L-shaped, and the outlet of the second oil cavity passage is the oil port A in the Figure 1 .

[0053] The second oil cavity passage and the end surface (i.e. the connection position) between the oil passage hole 31 provided on the left end cover 3 are end face sealed by the second O-shaped sealing ring 11. The second O-shaped sealing ring 11 is used to block the hydraulic oil inside the oil passage hole 31, so that the hydraulic oil does not leak out. The position of the second oil cavity passage corresponds to the position of the oil passage hole 31 provided on the left end cover 3.

[0054] The top rod 5 performs linear extension and retraction relative to the shell 6 under the differential pressure of the first oil cavity and the second oil cavity, and the movement of the top rod 5 realizes the driving of the external equipment. Further, the third gasket 13 is used for sealing between the left end cover 3 and the cylindrical part of the top rod 5, the third gasket 13 moves together with the cylindrical part of the top rod 5, and the third gasket 13 is used for isolating the hydraulic oil of the first oil cavity and the second oil cavity to generate the differential pressure effect of the first oil cavity and the second oil cavity.

[0055] Further, the left end cover 3 and the right end cover 7 are both cylindrical structures with one end open, the open end of the left end cover 3 faces the outside of the shell 6, and the open end of the left end cover 3 is fixedly connected with the left end of the shell 6, the open end of the right end cover 7 faces the outside of the shell 6, and the open end of the right end cover 7 is fixedly connected with the right end of the shell 6.

[0056] The first O-shaped sealing ring 12 is arranged between the open end of the left end cover 3 and the left end of the shell 6, and between the open end of the right end cover 7 and the right end of the shell 6, and is used for blocking the hydraulic oil inside the shell 6 and the seawater outside the shell 6, so that the seawater cannot penetrate in and the hydraulic oil cannot leak out.

[0057] Further, the first packing gland 14 is located on the left side of the first gasket 15, and the second packing gland is located on the right side of the second gasket; the first packing gland 14 is used for blocking the external seawater so that the seawater cannot penetrate in. The first gasket 15 is used for blocking the internal hydraulic oil so that the hydraulic oil cannot leak out. The second packing gland is used for blocking the external seawater so that the seawater cannot penetrate in. The second gasket is used for blocking the internal hydraulic oil so that the hydraulic oil cannot leak out. The distance between the left end surface of the first packing gland and the left end surface of the first gasket is equal to the distance between the right end surface of the second packing gland and the right end surface of the second gasket, which is L1, L1 is greater than the stroke L of the top rod 5, and L is the distance between the right end of the first boss 51 and the left end of the fifth boss 62 when the top rod 5 is located at the leftmost end.

[0058] The outer surface of the cylindrical portion of the ejector rod 5 is provided with a first boss 51 which is in clearance fit with the shell 6, the inner surface of the shell 6 is provided with a second boss 61 which is located at the left side of the first boss 51, the right end cover 7 is provided with a fifth boss 62 which is located at the right side of the first boss 51, during the process of the left movement of the ejector rod 5 to the position, a position buffer cavity is formed between the right end surface of the second boss 61 and the left end surface of the first boss 51, the position buffer cavity is used for buffering the movement of the ejector rod 5 to the position, when the ejector rod 5 moves to the left to the position, the right end surface of the second boss 61 and the left end surface of the first boss 51 are in contact to limit the position, during the process of the right movement of the ejector rod 5 to the position, a position buffer cavity is formed between the left end surface of the fifth boss 62 and the right end surface of the first boss 51, the position buffer cavity is used for buffering the movement of the ejector rod 5 to the position, when the ejector rod 5 moves to the right to the position, the left end surface of the fifth boss 62 and the right end surface of the first boss 51 are in contact to limit the position, if the fifth boss 62 is regarded as a groove formed by the left end of the right end cover 7, when the right end surface of the first boss 51 contacts the left end surface of the fifth boss 62, it can be considered that the right end of the cylindrical portion of the ejector rod 5 enters the groove.

[0059] Further, the seawater-proof external driving device further comprises a position feedback structure 4.

[0060] The outer surface of the cylindrical portion of the ejector rod 5 is provided with a third boss 52 and a fourth boss 53, the third boss 52 is located at the left side of the first boss 51, and the fourth boss 53 is located at the left side of the third boss 52; when the ejector rod 5 moves to the left to the position, the third boss 52 triggers the position feedback structure, when the ejector rod 5 moves to the right to the position, the fourth boss 53 triggers the position feedback structure, when the position feedback structure is triggered, a position signal is output to the external equipment.

[0061] Further, the position feedback structure 4 comprises a feedback shell 17, a centering spring 18, a slide rod 19, a shift fork 20, a water-tight socket 21 and a micro switch 22.

[0062] The feedback shell 17 is fixedly installed outside the shell 6, the slide rod 19 is fixedly installed inside the feedback shell 17, the axis of the slide rod 19 is parallel to the axis of the shell 6, the shell 6 is provided with a shift fork mounting hole, the first end of the shift fork 20 is fixedly connected to the slide rod 19, the second end of the shift fork 20 extends into the shell 6 through the shift fork mounting hole, when the ejector rod 5 moves to the left to the position, the third boss pushes the second end of the shift fork 20 to the left, and then drives the slide rod 19 to move to the left to trigger the micro switch 22, when the ejector rod 5 moves to the right to the position, the fourth boss pushes the second end of the shift fork 20 to the right, and then drives the slide rod 19 to move to the right to trigger the micro switch 22, when the micro switch 22 is triggered, a position signal is output to the external equipment through the water-tight socket 21; the slide rod 19 is fixed to the feedback shell 17 by the screw 16.

[0063] The centering spring 19 is fixed on the feedback shell 17 at one end and connected with the slide rod 19 at the other end, and is used to reset the slide rod 19 and separate the slide rod 19 from the micro switch 22 after the third or fourth boss is separated from the second end of the shift fork 20, and the micro switch 22 is closed.

[0064] Further, the seawater-proof external driving device further comprises an anti-fouling mechanism.

[0065] The anti-fouling mechanism comprises an anti-fouling cover 1, the anti-fouling cover 1 comprises a left anti-fouling cover and a right anti-fouling cover, the left anti-fouling cover and the right anti-fouling cover are respectively arranged outside the left end and the right end of the shell 6, the left end and the right end of the top rod 5 respectively pass through the left anti-fouling cover and the right anti-fouling cover, and the left anti-fouling cover and the right anti-fouling cover are respectively fixedly connected with the left end and the right end of the top rod 5 through the back nut 23.

[0066] The anti-fouling cover 1 is in clearance fit with the shell 6, the top rod 5 drives the anti-fouling cover 1 to move relative to the shell 6, seawater enters or is discharged from the anti-fouling cover 1 through the clearance between the anti-fouling cover 1 and the shell 6, and the shell 6 is washed from the outside.

[0067] Further, the edge of the cooperation position of the anti-fouling cover 1 and the shell 6 is an acute angle. The top rod 5 drives the anti-fouling cover 1 to move relative to the shell 6, and the anti-fouling cover scrapes marine attachments on the shell 6.

[0068] Working principle: the pipe joint is connected with the oil port A, the second oil cavity inputs (or outputs) high-pressure hydraulic oil through the oil port A, the first oil cavity outputs (or inputs) high-pressure hydraulic oil through the oil port B, the top rod 5 is extended outwards (or retracted) under the action of the hydraulic oil, and the top rod drives the equipment (such as a valve) to open (or close) through the connecting rod mechanism. The seawater-proof sealing structure is used to realize seawater-proof dynamic sealing, the anti-fouling structure is used to avoid marine attachments, the in-place buffering mechanism is used to realize the in-place buffering function of the top rod, and the in-place feedback mechanism is used to realize the in-place position feedback of the switch.

[0069] Seawater-proof sealing structure: the device uses an O-shaped sealing ring for external static sealing and uses a combination of a gasket ring and a packing box for external dynamic sealing, as shown in Figure 1 and Figure 2 The use of the packing box sealing is the main way for ships to seal seawater externally, and the seawater-proof reliability is high after long-term examination. L1 is greater than the stroke L of the top rod, because the part of the top rod eroded by seawater is first through the packing box in the movement process, and the distance between the packing box and the gasket ring is greater than the stroke of the top rod, so the part of the top rod eroded by seawater cannot reach the gasket ring. Through the design, it can be ensured that the part of the top rod eroded by seawater does not pass through the gasket ring, avoiding the use of the gasket ring in harsh working conditions, so that the seawater-proof sealing is more effective and reliable.

[0070] Antifouling structure: in order to prevent the top rod exposed in the sea water part of the generation of marine fouling set antifouling mechanism such as attached Figure 3 As shown in the figure, the antifouling cover 1 and the top rod 5 are fixed by the back mother 23 and move together with the top rod 5, the antifouling cover 1 and the shell 6 are gap fit, preventing marine organisms into the antifouling cover inside; The place where the antifouling cover 1 and the shell 6 cooperate has an acute angle edge, such as Figure 3 The acute angle α = 45°, which can scrape off the marine fouling on the shell 6; When the top rod 5 extends and retracts, the seawater in the antifouling cover 1 is squeezed or sucked, forming a flushing effect to further clean the marine fouling.

[0071] Position buffer structure: in order to prevent the drive device from hitting the position, the position buffer mechanism is set, such as attached Figure 4 As shown in the figure, the step (first boss 51) of the top rod 5 and the step (second boss 61) of the shell 6 and the right end cover 7 (fifth boss 62) are provided with a throttling gap, when the top rod 5 moves to the left and is close to the position, the first boss 51 and the second boss 61 form a cavity, when the top rod 5 moves to the right and is close to the position, the first boss 51 and the fifth boss 62 form a cavity, the cavity is filled with hydraulic oil, and the top rod continues to move to squeeze the hydraulic oil out of the throttling gap, which realizes the buffer of the top rod through the throttling effect.

[0072] Position feedback structure: in order to judge whether the air valve driven by the external drive device of the application is completely opened or closed, the position feedback mechanism is set, such as attached Figure 5 As shown in the figure, two steps (third boss 52 and fourth boss 53) are provided on the top rod 5, when the drive device is close to the position, one step (or the other step) of the top rod will touch the fork 20 and drive the fork 20 to move until the position, the fork 20 is inserted into the slide rod 19, so that the slide rod 19 moves, the taper surface of the head of the slide rod 19 pushes the micro switch 22 to close and sends a position signal. When the drive device is in the middle of opening or closing, the two steps of the sleeve (the cylindrical part of the top rod) are away from the fork 20, at this time the slide rod 19 returns to the middle position under the action of the centering spring 18, at this time the taper surface of the head of the slide rod 19 is away from the micro switch, and the micro switch returns to the original state and does not send a position signal.

[0073] Overall structure: through the reasonable integration of the seawater sealing mechanism, the antifouling mechanism, the position buffer mechanism, the feedback mechanism and the shell top rod, the overall structure is optimized by reasonable arrangement.

[0074] The present application is described in detail above in connection with specific embodiments and exemplary examples, but the description is not to be construed to limit the present application. It will be understood by those skilled in the art that various equivalents, modifications and substitutions can be made to the present application and its embodiments without departing from the spirit and scope of the present application, and these are to be construed to fall within the scope of the present application. The scope of the present application is defined by the appended claims.

[0075] The contents not described in detail in the specification of the present application are known to those skilled in the art.

Claims

1. A seawater-resistant external drive device, characterized in that, Includes left pressure cap (2), right pressure cap (8), left end cap (3), right end cap (7), top rod (5) and housing (6); The shell (6) is a cylindrical structure with openings at both ends; The left end cap (3) and the right end cap (7) are fixedly connected to the left and right ends of the housing (6), respectively; The top rod (5) includes a rod-shaped part and a cylindrical part outside the rod-shaped part. The cylindrical part is coaxial with the rod-shaped part and connected as a whole. The rod-shaped part passes through the left end cover (3) and the right end cover (7) in sequence. The cylindrical part is located between the outer surface of the left end cover (3) and the inner surface of the shell (6). The cylindrical part is in clearance fit with the shell (6). The rod-shaped part of the top rod (5) is sealed with the right end cover (7) by the second stuffing box and the second grid ring. The rod-shaped part of the top rod (5) is sealed with the left end cover (3) by the first stuffing box and the first grid ring. The first stuffing box is filled in the stepped hole of the left end cover (3). The first stuffing box is pressed from the left end by the left pressure cover (2). The second stuffing box is filled in the stepped hole of the right end cover (7). The second stuffing box is pressed from the right end by the right pressure cover (8). The left pressure cover (2) is fixedly connected to the left end cover (3). The right pressure cover (8) is fixedly connected to the right end cover (7). A second oil cavity is formed between the left end cap (3) and the inner surface of the cylindrical part, and a first oil cavity is formed between the right end cap (7), the outer surface of the cylindrical part and the shell (6); the push rod (5) performs linear telescopic movement relative to the shell (6) under the pressure difference between the first oil cavity and the second oil cavity, and the movement of the push rod (5) drives the external equipment. The cylindrical portion of the left end cap (3) and the top rod (5) is sealed using the third compartment ring (13); Both the left end cap (3) and the right end cap (7) are cylindrical structures with one open end. The open end of the left end cap (3) faces the outside of the shell (6) and is fixedly connected to the left end of the shell (6). The open end of the right end cap (7) faces the outside of the shell (6) and is fixedly connected to the right end of the shell (6). A first O-ring (12) is provided between the opening end of the left end cover (3) and the left end of the housing (6), and between the opening end of the right end cover (7) and the right end of the housing (6). The first stuffing box is located to the left of the first ring, and the second stuffing box is located to the right of the second ring. The distance between the left end face of the first stuffing box and the left end face of the first grid ring is equal to the distance between the right end face of the second stuffing box and the right end face of the second grid ring, denoted as L1. L1 is greater than the stroke L of the push rod (5). The housing (6) is provided with a first oil cavity passage and a second oil cavity passage, and the left end cap (3) is provided with an oil passage hole (31). The first oil chamber passage is connected to the first oil chamber and is used for the hydraulic oil in the first oil chamber to enter and exit; The second oil chamber passage is connected to one end of the oil passage hole (31) provided on the left end cover (3), and the other end of the oil passage hole (31) is connected to the second oil chamber. The second oil chamber passage and the oil passage hole (31) are used for the hydraulic oil in the second oil chamber to enter and exit. The connection between the second oil cavity passage and the oil passage (31) is sealed using a second O-ring (11).

2. The seawater-resistant external drive device according to claim 1, characterized in that, The outer surface of the cylindrical part of the push rod (5) is provided with a first boss that fits with the housing (6) with clearance. The inner surface of the housing (6) is provided with a second boss. The second boss is located to the left of the first boss. The left end of the right end cover (7) is provided with a fifth boss. The fifth boss is located to the right of the first boss. When the push rod (5) moves to the left, a positioning buffer cavity is formed between the right end face of the second boss and the left end face of the first boss. The positioning buffer cavity is used to buffer the movement of the push rod (5). When the push rod (5) moves to the left, the right end face of the second boss and the left end face of the first boss contact each other to achieve a limit. When the push rod (5) moves to the right, a positioning buffer cavity is formed between the left end face of the fifth boss and the right end face of the first boss. When the push rod (5) moves to the right, the left end face of the fifth boss and the right end face of the first boss contact each other to achieve a limit.

3. The seawater-resistant external drive device according to claim 2, characterized in that, It also includes the location feedback structure (4); The outer surface of the cylindrical part of the push rod (5) is provided with a third boss and a fourth boss. The third boss is located to the left of the first boss, and the fourth boss is located to the left of the third boss. When the push rod (5) moves to the left and is in place, the third boss triggers the position feedback structure. When the push rod (5) moves to the right and is in place, the fourth boss triggers the position feedback structure. When the position feedback structure is triggered, it outputs a position signal to the external device.

4. The seawater-resistant external drive device according to claim 3, characterized in that, The positioning feedback structure (4) includes a feedback housing (17), a centering spring (18), a slide rod (19), a shift fork (20), a watertight socket (21), and a micro switch (22). Feedback housing (17) is fixedly installed outside housing (6), slide rod (19) is installed inside feedback housing (17), the axis of slide rod (19) is parallel to the axis of housing (6), housing (6) is provided with fork mounting hole, the first end of fork (20) is fixedly connected to slide rod (19), the second end of fork (20) extends into housing (6) through fork mounting hole, when push rod (5) moves to the left, the third boss pushes the second end of fork (20) to the left, thereby driving slide rod (19) to move to the left to trigger micro switch (22), when push rod (5) moves to the right, the fourth boss pushes the second end of fork (20) to the right, thereby driving slide rod (19) to move to the right to trigger micro switch (22), when micro switch (22) is triggered, outputs position signal to external equipment through watertight socket (21); One end of the centering spring (18) is fixed to the feedback housing (17), and the other end is connected to the slide rod (19). The centering spring (18) is used to reset the slide rod (19) and separate it from the micro switch (22) after the third or fourth boss is separated from the second end of the shift fork (20), and the micro switch (22) is reset.

5. The seawater-resistant external drive device according to claim 1, characterized in that, It also includes anti-fouling mechanisms; The anti-fouling mechanism includes an anti-fouling cover (1), which includes a left anti-fouling cover and a right anti-fouling cover. The left and right anti-fouling covers are respectively located on the outside of the left and right ends of the housing (6). The left and right ends of the top rod (5) pass through the left and right anti-fouling covers respectively. The left and right anti-fouling covers are fixedly connected to the left and right ends of the top rod (5) respectively. The antifouling cover (1) and the shell (6) are fitted with a clearance. The top rod (5) drives the antifouling cover (1) to move relative to the shell (6). Seawater enters or exits the antifouling cover (1) through the gap between the antifouling cover (1) and the shell (6), thereby scouring the outer surface of the shell (6).

6. The seawater-resistant external drive device according to claim 5, characterized in that, The edge of the antifouling cover (1) and the shell (6) is set at an acute angle. The edge set at an acute angle is used to scrape marine deposits on the shell (6) when the antifouling cover (1) moves relative to the shell (6).

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