Power trim device
By designing a power trimming device, the hydraulic cylinder and oil pump system are used to realize the up and down tilting motion of the outboard motor, which solves the problem of the traditional outboard motor being unable to adjust the propulsion propeller angle and body plane, and realizes tilting in uneven river bottoms and reef environments. protection and promotion of efficiency improvements.
Patent Information
- Application Number
- CN202421271148.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The traditional outboard can only rotate left and right at the rear end of the hull, and cannot adjust the up and down angle of the propeller and the lifting body is parallel to the bottom of the ship or the middle of the ship, resulting in easy damage in uneven river bottoms and reef environments, and cannot adjust the best The propulsion angle leads to slow ship speed and high energy consumption.
Design a power vertical dumping device, including electric motor, oil pump components, hydraulic cylinder components, upper leaning circuits, and dumping circuits. Planes, avoid impact and optimize advance efficiency.
The protection of the outdoor unit at the bottom of the uneven river and the reef environment, avoiding the damage to the promotion of propeller impact, and increased the speed of boat and reduce energy consumption by regulating the perspective.
Smart Images
Figure CN222388350U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power trim devices, in particular to a power trim device. Background Art
[0002] At present, military assault boats, speedboats, civilian small boats, etc. all use outboard propulsion equipment at the rear end of the hull, referred to as outboard motors. The motor is an integrated structure, with a fuel tank, an engine and an operating lever at the upper end, and a propulsion propeller at the lower end. The motor is located outboard at the rear end of the hull and axially connected to the side of the ship. When in use, the engine speed can be controlled by holding the operating lever to control the speed of the ship. Moving the operating lever left and right can change the propulsion angle between the propulsion propeller on the outboard motor and the axis of the ship to control the direction of travel of the ship. The traditional outboard motor can only rotate left and right at the rear end of the hull, that is, it can only make the propulsion propeller go straight or rotate left and right, but cannot adjust the up and down angles of the propulsion propeller and level the body to be parallel to the bottom of the ship or the middle of the ship. When in use, most of the outboard motor is located at the lower end of the bottom of the ship. Due to the uneven river bottom, there are many protruding reefs and debris in the river. When the ship is traveling at high speed, the propulsion propeller hits the reefs and debris and is destroyed.
[0003] On the other hand, the traditional outboard motor cannot adjust the optimal propulsion angle of the propeller, which makes the boat slow and consumes more energy. The gas-liquid lifter can adjust the optimal propulsion angle of the propeller and also has anti-collision protection function, but the traditional gas-liquid lifter has a complex structure, slow adjustment speed, high price, and the driver cannot control the boat from the front. Utility Model Content
[0004] In view of the above technical deficiencies, the purpose of the utility model is to provide a power trim device and its working method to solve the problem that the traditional outboard motor can only rotate left and right at the rear end of the hull but cannot adjust the up and down angles of the propulsion propeller and lift the body to be parallel with the bottom or the middle of the ship.
[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0006] A power trim device comprises an electric motor, an oil pump assembly, a hydraulic cylinder assembly, an up-tilt circuit and a down-tilt circuit;
[0007] The hydraulic cylinder assembly comprises a hydraulic cylinder and a piston push rod set, the lower end of the piston push rod set is installed inside the hydraulic cylinder, the upper end of the hydraulic cylinder is fixedly connected with an end cover, an impact return valve is installed on one side of the lower end of the hydraulic cylinder, an impact overflow valve is installed on the other side of the lower end of the hydraulic cylinder, an impact piston is arranged outside the impact overflow valve, and a positioning piston is arranged below the impact piston;
[0008] The oil pump assembly includes a downtilt circuit pressure-controlled relief valve, a downtilt circuit pressure control valve, a filter, an uptilt circuit suction port, an oil pump gear, a downtilt circuit suction port, an oil filling port cover, a reciprocating pump, an uptilt circuit pressure-controlled valve, a pressurized liquid reservoir, and oil in the oil reservoir;
[0009] The oil filling port cover is arranged on the outside of the pressurized reservoir, the oil pump gear is installed on the upper end of the oil pump, the inlet of the up-tilt circuit and the inlet of the down-tilt circuit are respectively arranged on both sides of the oil pump gear, the reciprocating valve is located at the bottom of the oil pump, the pressure control valve of the up-tilt circuit is located on the outside of the reciprocating valve, the pressure control overflow valve of the down-tilt circuit is located at the upper left end of the oil pump, the pressure control valve of the down-tilt circuit is located below the pressure control overflow valve of the down-tilt circuit, a plurality of filters are installed on the outside of the oil pump and are located on the outside of the pressure control valve of the down-tilt circuit, the oil pump is installed in the oil in the oil reservoir, the motor is connected to the oil pump, and a manifold backflow suction valve o and a manual discharge valve p are installed at the bottom of the right side of the oil pump;
[0010] The hydraulic cylinder assembly includes a pitch push rod, an end cover, an impact return valve, a positioning piston, an impact piston, an impact overflow valve and a hydraulic cylinder. The end cover is installed on the top of the hydraulic cylinder, the pitch push rod is installed inside the hydraulic cylinder, the impact return valve and the impact overflow valve are respectively arranged on both sides of the hydraulic cylinder, the impact piston is located on the outside of the bottom of the hydraulic cylinder, and the positioning piston is installed below the impact piston; a confluence seat, a tilting overflow valve, and a tilting overflow piston are installed at the bottom of the oil pump, and a multi-channel oil pipe is installed between the bottom of the oil pump and the hydraulic cylinder.
[0011] Preferably, the trim system realizes the tilting action of the outboard motor by opening the suction port of the tilting circuit and the pressure control valve of the tilting circuit and closing the manual drain valve.
[0012] Preferably, the tilt circuit realizes the tilt action of the outboard motor by closing the trim hydraulic cylinder and the manual drain valve and opening the tilt circuit pressure control valve.
[0013] Preferably, the tilt down circuit realizes the tilt down action of the outboard motor by opening the trim hydraulic cylinder and the tilt up circuit pressure control valve, and opening the tilt down circuit pressure control valve.
[0014] Preferably, the trim system realizes the manual lifting and lowering action of the outboard motor by opening and closing the manual relief valve and connecting and disconnecting the manifold.
[0015] Preferably, when a leak occurs in the trim system, the manual relief valve is first closed and then checked. When the manual relief valve and the O-ring are damaged, the manual relief valve and the O-ring need to be replaced. When the manual relief valve and the O-ring are fine, the manual relief valve needs to be cleaned and then installed back in place.
[0016] Preferably, when a leak occurs in the trim system, the tilt relief valve is removed and the O-ring and seal are checked for debris and / or damage. If there is debris or damage, the tilt relief valve is replaced; if there is no problem with the tilt relief valve and the O-ring, the tilt relief valve is cleaned and then installed back in place.
[0017] Preferably, when the outboard motor cannot be maintained in the tilted position when reversing or is pulled out during high-speed deceleration, first check the manual relief valve. If the manual relief valve and O-ring are fine, clean the manual relief valve and install the valve back to its original position, or replace the manual relief valve and O-ring. When the trim system cannot withstand the reverse thrust, remove the piston rod assembly and check whether there are debris and / or impact balls stuck.
[0018] Preferably, when it is found that there is debris in the piston rod assembly and / or the impact steel ball is stuck, replace the piston rod assembly. When the impact piston is OK, clean the piston rod assembly and then install it back to its original position. Then test whether the trim system can withstand the reverse thrust. If the trim system cannot withstand the reverse thrust, remove the pressure-controlled check valve assembly and check whether the O-ring and seal are
[0019] If there is any debris and / or damage, replace the pressure-controlled check valve assembly. If there is no problem with the pressure-controlled check valve, clean the pressure-controlled check valve assembly and then install it back.
[0020] Compared with the prior art, the beneficial effects achieved by the utility model are:
[0021] First, the power trim system of the utility model is composed of an electric motor, a pressurized fluid reservoir, a pump and a trim hydraulic cylinder. There is a switch on the remote control device (or trim control panel) to trim the outboard motor up or down, and also to tilt the outboard motor upward when sailing at low speed in shallow water or towing. Whether the engine is running with load or in a stopped state, it can be trimmed up or down. Because different ship designs have different performances in various severe sea conditions, it is recommended to test various trim positions to determine whether trimming up or down can improve the navigation state in severe sea conditions. When the trim switch is closed in the down position, the motor will drag the oil pump gear in the opposite direction. The oil pump gear rotates in the opposite direction, and the flow direction of the oil is also reversed. The oil enters the oil pump gear through the filter and the down loop suction port, and the pump pushes the pressurized oil into the down channel. The oil slides the shuttle valve into the up-tilt circuit pressure control valve. The force of the shuttle valve opens the up-tilt circuit pressure control valve, allowing oil to flow back from the up-tilt chamber of the trim hydraulic cylinder to the oil pump. The oil flowing back from the up-tilt chamber is supplied to the down-tilt circuit. The steel ball in the up-tilt circuit suction port blocks the oil from flowing back to the oil reservoir. The pressurized oil opens the down-tilt circuit pressure control valve and enters the down-tilt channel in the manifold. The manifold channel connects the hydraulic cylinder channel to the cylinder top. The cavity above the impact piston in the cylinder is the down-tilt chamber. When the down-tilt chamber is filled with oil, the trim push rod retracts into the cylinder, lowering the outboard. The oil flows out of the hydraulic cylinder from the up-tilt chamber and flows back to the pump through the stopped up-tilt circuit pressure control valve. When the trim push rod reaches the maximum stroke, the oil pressure in the down-tilt chamber increases until the down-tilt circuit pressure relief valve opens and diverts the oil back to the oil reservoir. When the trim button is released, the pump stops supplying oil, the two pressure control valves are closed, and if opened, the down-tilt circuit pressure relief valve will close. The closed valve locks the working fluid on both sides of the impact piston and the positioning piston, keeping the outboard motor in the desired position.
[0022] Second, in the utility model, since the manual relief valve of the downtilt circuit pressure control valve and the reverse suction valve of the manifold seat are both closed, the oil in the downtilt chamber is locked in a static state. If the outboard motor hits an underwater object in the upright state, the pitch push rod tries to extend from the hydraulic cylinder as quickly as possible. The pressure in the hydraulic cylinder downtilt chamber and the connected channel increases. When the pressure increases to the required level, the impact unloading valve in the impact piston opens, allowing the working fluid to flow through the impact piston. When the working fluid flows through the impact piston, the pitch push rod extends from the hydraulic cylinder. The positioning piston generates a vacuum lock because the oil in the uptilt chamber is locked in a static state. Therefore, the oil passing through the impact piston stays between the positioning piston and the impact piston.
[0023] Third, after the outboard motor of the utility model leaves the underwater object, the weight of the engine increases the oil pressure between the positioning piston and the impact piston. When it rises to the required level, the impact return valve in the impact piston is opened to allow the oil to return to the downward chamber through the impact piston. If necessary, additional oil flows into the downward chamber through the manifold backflow suction valve. In this way, the engine is reset to support the positioning piston and return to the original operating position.
[0024] Fourth, to manually tilt the outboard motor, the boat owner needs to turn the manual drain valve out 3 to 5 turns. After the valve is withdrawn, the internal pipes of the manifold are connected to each other. These channels connect the up-tilt chamber, down-tilt chamber, and oil reservoir of the hydraulic cylinder, so that the engine can be raised or lowered. The action of the trim push rod continues until the manual drain valve is closed, sealing the working fluid in the hydraulic cylinder and the manifold. If the outboard motor is to be manually raised, the manual drain valve (tilt) valve is rotated counterclockwise to the fully withdrawn position. In the full (withdrawn) position, the oil in the hydraulic cylinder can flow freely from top to bottom or from bottom to top. The return line into the oil reservoir is also unobstructed, allowing oil to flow freely to each side of the cylinder to compensate for the different volumes of the upper and lower chambers of the hydraulic cylinder. When the outboard motor is tilted up or down, if the manual tilt valve is open or leaking, the engine will have little or no movement. The oil pressure from the pump will be supplied to the up-tilt chamber and supplied to the down-tilt chamber through the manual tilt valve. The pressure in both chambers is the same, resulting in little or no movement. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the structure of the upward tilt circuit of the power trim working fluid flow circuit of the utility model;
[0026] Figure 2 It is a schematic diagram of the upward tilting structure of the power trim working fluid flow circuit of the utility model;
[0027] Figure 3 It is a schematic diagram of the maximum tilting circuit structure of the power trim working fluid flow circuit of the utility model;
[0028] Figure 4 It is a schematic diagram of the downward tilt circuit structure of the power trim working fluid flow circuit of the utility model;
[0029] Figure 5 It is a schematic diagram of the structure of the upward trimming circuit after underwater collision of the power trimming working fluid flow circuit of the utility model;
[0030] Figure 6 It is a schematic diagram of the structure of the underwater post-collision reset circuit of the power trim working fluid flow circuit of the utility model;
[0031] Figure 7 It is a schematic diagram of the structure of the manual tilting circuit of the power trim working fluid flow circuit of the utility model;
[0032] Figure 8 It is a schematic diagram of the structure of the hydraulic system fault finding and troubleshooting flow chart of the utility model;
[0033] Fig. 9 It is a schematic diagram of the structure of the hydraulic system fault finding and troubleshooting flow chart of the utility model;
[0034] Fig.10 It is a schematic diagram of the structure of the hydraulic system fault finding and troubleshooting flow chart of the utility model;
[0035] Fig.11 It is a schematic diagram of the structure of the hydraulic system fault finding and troubleshooting flow chart of the utility model;
[0036] Fig.12 It is a schematic diagram of the external structure of the utility model.
[0037] Among them: a, pitch push rod; b, end cover; c, motor; d, oil in the oil reservoir; e, downtilt circuit pressure relief valve; f, downtilt circuit pressure control valve; g, filter; h, impact return valve; i, uptilt circuit suction port; j, oil pump gear; k, downtilt circuit suction port; 1, oil filling port cover; m, reciprocating valve; n, uptilt circuit pressure control valve; o, manifold seat backflow suction valve; p, manual discharge valve; q, manifold seat; r, lift relief valve; s, lift relief piston; t, positioning piston; u, impact piston; v, impact relief valve; w, hydraulic cylinder. DETAILED DESCRIPTION
[0038] The specific implementation of the utility model will be further described in detail below with reference to the accompanying drawings. Specific implementation method 1
[0040] The following is a specific implementation of a power trim device and its working method.
[0041] See also Figure 1-7 .
[0042] A power trim device, comprising an electric motor C, an oil pump assembly, a hydraulic cylinder W assembly, an up-tilt circuit and a down-tilt circuit;
[0043] The hydraulic cylinder w assembly includes a hydraulic cylinder w and a piston push rod kit. The lower end of the piston push rod kit is installed inside the hydraulic cylinder w. The upper end of the hydraulic cylinder w is fixedly connected with an end cover b. An impact return valve is installed on one side of the lower end of the hydraulic cylinder w. An impact overflow valve is installed on the other side of the lower end of the hydraulic cylinder w. An impact piston u is arranged outside the impact overflow valve. A positioning piston t is arranged below the impact piston u.
[0044] The oil pump assembly includes a downtilt circuit pressure control relief valve, a downtilt circuit pressure control valve, a filter g, an uptilt circuit suction port i, an oil pump gear j, a downtilt circuit suction port k, an oil filling port cover 1, a reciprocating pump, an uptilt circuit pressure control valve n, a pressurized liquid reservoir, and oil d in the oil reservoir;
[0045] The oil filling port cover 1 is arranged on the outside of the pressurized reservoir, the oil pump gear j is installed on the upper end of the oil pump, the inlet i of the up-tilt circuit and the inlet k of the down-tilt circuit are respectively arranged on both sides of the oil pump gear j, the reciprocating valve is located at the bottom of the oil pump, the pressure control valve n of the up-tilt circuit is located on the outside of the reciprocating valve, the pressure control overflow valve of the down-tilt circuit is located on the upper left side of the oil pump, the pressure control valve of the down-tilt circuit is located below the pressure control overflow valve of the down-tilt circuit, a plurality of filters g are installed on the outside of the oil pump and are located on the outside of the pressure control valve of the down-tilt circuit, the oil pump is installed in the oil d in the oil reservoir, the motor c is connected to the oil pump, and the bottom right side of the oil pump is installed with a confluence seat q, a reverse suction valve o and a manual discharge valve p;
[0046] The hydraulic cylinder w assembly includes a pitch push rod a, an end cover b, an impact return valve, a positioning piston t, an impact piston u, an impact overflow valve and a hydraulic cylinder w. The end cover b is installed at the top of the hydraulic cylinder w, the pitch push rod a is installed inside the hydraulic cylinder w, the impact return valve and the impact overflow valve are respectively arranged on both sides of the inside of the hydraulic cylinder w, the impact piston u is located on the outside of the bottom of the hydraulic cylinder w, and the positioning piston t is installed below the impact piston u; a confluence seat q, a tilting overflow valve r, and a tilting overflow piston s are installed at the bottom of the oil pump, and a multi-channel oil pipe is installed between the bottom of the oil pump and the hydraulic cylinder w.
[0047] With the above technical solution, the power trim system consists of an electric motor c, a pressurized reservoir, a pump and a trim hydraulic cylinder w. There is a switch on the remote control device (or trim control panel) to trim the outboard motor up or down, and also to tilt the outboard motor upward when sailing at low speed in shallow water or towing. Whether the engine is running under load or in a stopped state, it can be trimmed up or down.
[0048] Trim characteristics: Because different ship designs perform differently in various severe sea conditions, it is recommended to test various trim positions to determine whether trimming up or down improves navigation in severe sea conditions.
[0049] Outboard Trim: Too much trim can reduce the stability of some speedboats. To correct the instability during speed change, gradually reduce the power and tilt the engine slightly inward before resuming high speed operation. (Rapid reduction of shaft power will cause a sudden change in steering torque, which may cause the boat to become more unstable instantly.
[0050] The trim cylinder w / trim pushrod a will place the engine at the desired trim angle within 20° of maximum trim. The power trim system is designed so that the engine trim cannot exceed 20° of maximum trim above approximately 2000 rpm. Maintaining the engine speed below 2000 rpm, the engine can be raised above 20° of maximum trim, e.g., in shallow water. If the engine speed exceeds 2000 rpm, the propeller thrust (if the water depth is sufficient) will cause the trim system to automatically lower the engine to within 20° of maximum trim.
[0051] Outboard engine down (tip): Activating the down pitch circuit will activate the down pitch relay (located under the engine hood), closing the motor c circuit (motor c will rotate in the opposite direction to the up pitch circuit). Motor c will drive the pump, pushing the automatic transmission working fluid through the internal passage to the down pitch side of the trim cylinder w. The trim push rod a will push the engine down to the required angle. When the inboard is the minimum, too high a speed may cause an undesirable and / or unsafe steering condition. Each boat must be tested for handling performance after any adjustment to the up pitch angle (repositioning the tilt pin).
[0052] Towing an outboard motor: Start the tilting circuit, and the push rod of the hydraulic cylinder W will make the outboard motor tilt up to the highest position continuously. It is used to tow an outboard motor. Too much trim of the engine will lead to insufficient water supply to the water pump, causing overheating and damage to the water pump and / or power head. Whenever the engine is running, be sure to keep the water level higher than the gearbox water inlet.
[0053] Manually raising and lowering the outboard: When the power trim is installed, the outboard can be raised or lowered manually by turning the manual drain valve 3 to 4 turns (counterclockwise). Before releasing the manual drain valve, make sure that all personnel have left the engine, because after the drain valve is released, the engine will drop to the lowest position. Specific implementation method 2
[0055] The following is a specific implementation method of the downtilt circuit of a power trim device working mode.
[0056] When the trim switch is closed in the downtilt position, the motor c will drag the oil pump gear j in the opposite direction. The oil pump gear rotates in the opposite direction, and the flow direction of the oil is also reversed. The oil enters the oil pump gear j through the filter g and the downtilt circuit suction port k, and the pump pushes the pressurized oil into the downtilt channel. The oil slides the reciprocating valve m into the uptilt circuit pressure control valve n. The force of the reciprocating valve opens the uptilt circuit pressure control valve, allowing the oil to flow back from the uptilt chamber of the trim hydraulic cylinder w to the oil pump. The oil flowing back from the uptilt chamber is supplied to the downtilt circuit. The steel ball i in the uptilt circuit suction port blocks the oil from flowing back to the oil reservoir. The pressurized oil opens the downtilt circuit pressure control valve f and enters the downtilt channel in the manifold seat q. The manifold seat channel connects the hydraulic cylinder channel and leads to the cylinder top. The cavity above the impact piston u in the cylinder is the downtilt chamber. When the downtilt chamber is filled with oil, the trim push rod a retracts into the cylinder to lower the outboard motor. The oil flows out of the hydraulic cylinder from the up-tilt chamber and flows back to the pump through the stopped up-tilt circuit pressure control valve n. When the trim push rod reaches the maximum stroke, the oil pressure in the down-tilt chamber increases until the down-tilt circuit pressure relief valve e opens and diverts the oil back to the oil reservoir. When the trim button is released, the pump stops supplying oil, the two pressure control valves f and n close, and if opened, the down-tilt circuit pressure relief valve e will close. The closed valves lock the working fluid on both sides of the impact piston u and the positioning piston t, keeping the outboard motor in the set position. Specific implementation method three
[0058] The following is a specific implementation method of a power trim device working mode of trimming upward and falling back after underwater collision.
[0059] Since the manual relief valve p of the downtilt circuit pressure control valve f and the reverse suction valve o of the manifold seat are both closed, the oil in the downtilt chamber is locked in a static state. If the outboard motor hits an underwater object in the forward position, the trim push rod a tries to extend from the hydraulic cylinder w as quickly as possible. The pressure in the hydraulic cylinder downtilt chamber and the connected channel increases. When the pressure increases to the required level, the impact unloading valve v in the impact piston u opens, allowing the working fluid to flow through the impact piston. When the working fluid flows through the impact piston, the trim push rod a extends from the hydraulic cylinder. The positioning piston generates a vacuum lock because the oil in the uptilt chamber is locked in a static state. Therefore, the oil passing through the impact piston stays between the positioning piston c and the impact piston u. Specific implementation method four
[0061] The following is a specific implementation method of an underwater post-collision reset circuit of a power trim device working mode.
[0062] After the outboard motor leaves the underwater object, the weight of the engine increases the oil pressure between the positioning piston t and the impact piston u. When it rises to the required level, the impact return valve h in the impact piston is opened to allow the oil to return to the downward tilt chamber through the impact piston. If necessary, additional oil flows into the downward tilt chamber through the manifold backflow suction valve o. In this way, the engine is reset to support the positioning piston t and return to the original operating position. Specific implementation method five
[0064] The following is a specific implementation method of a manual tilting circuit of a power trim device working mode
[0065] To manually tilt the outboard, the owner needs to turn the manual drain valve p out 3 to 5 turns. When the valve is withdrawn, the internal pipes of the manifold are connected to each other. These passages connect the up and down chambers of the hydraulic cylinder, as well as the oil reservoir, allowing the engine to be raised or lowered. The action of the trim push rod a continues until the manual drain valve p is closed, sealing the working fluid in the hydraulic cylinder and the manifold. If the outboard is to be raised manually, turn the manual drain valve (tilt) valve counterclockwise to the fully withdrawn position. In the full (withdrawn) position, the oil in the hydraulic cylinder can flow freely from top to bottom or from bottom to top. The return line to the oil reservoir is also unobstructed, allowing oil to flow freely to each side of the cylinder, compensating for the different volumes of the upper and lower chambers of the hydraulic cylinder. When the outboard is tilted up or down, if the manual tilt valve is open or leaking, the engine will have little or no movement. Oil pressure from the pump will be supplied to the up chamber and supplied to the down chamber through the manual tilt valve. The pressure in the two chambers is the same, resulting in little or no movement.
[0066] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these specific embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A power trim device, characterized in that: It includes an electric motor (c), an oil pump assembly, a hydraulic cylinder (w) assembly, an up-tilt circuit and a down-tilt circuit; The hydraulic cylinder (w) assembly comprises a hydraulic cylinder (w) and a piston push rod set, wherein the lower end of the piston push rod set is installed inside the hydraulic cylinder (w), the upper end of the hydraulic cylinder (w) is fixedly connected with an end cover (b), a percussion return valve is installed on one side of the lower end of the hydraulic cylinder (w), a percussion overflow valve is installed on the other side of the lower end of the hydraulic cylinder (w), an impact piston (u) is arranged outside the impact overflow valve, and a positioning piston (t) is arranged below the impact piston (u), The oil pump assembly comprises a down-tilt circuit pressure-controlled relief valve, a down-tilt circuit pressure control valve, a filter (g), an up-tilt circuit suction port (i), an oil pump gear (j), a down-tilt circuit suction port (k), an oil filling port cover (1), a reciprocating pump, an up-tilt circuit pressure-controlled valve (n), a pressurized liquid reservoir, and oil in the oil reservoir (d); The oil filling port cover (1) is arranged on the outside of the pressurized reservoir, the oil pump gear (j) is installed on the upper end of the oil pump, the inlet of the up-tilt circuit (i) and the inlet of the down-tilt circuit (k) are respectively arranged on both sides of the oil pump gear (j), the reciprocating valve is located at the bottom of the oil pump, the pressure control valve (n) of the up-tilt circuit is located on the outside of the reciprocating valve, the pressure control overflow valve of the down-tilt circuit is located on the upper left end of the oil pump, the pressure control valve of the down-tilt circuit is located below the pressure control overflow valve of the down-tilt circuit, a plurality of filters (g) are installed on the outside of the oil pump and are located on the outside of the pressure control valve of the down-tilt circuit, the oil pump is installed in the oil (d) in the oil reservoir, the motor (c) is connected to the oil pump, and a confluence seat (q), a backflow suction valve (o) and a manual discharge valve (p) are installed at the bottom of the right side of the oil pump; The hydraulic cylinder (w) assembly comprises a pitch push rod (a), an end cover (b), a knock return valve, a positioning piston (t), an impact piston (u), an knock overflow valve and a hydraulic cylinder (w), wherein the end cover (b) is mounted on the top of the hydraulic cylinder (w), the pitch push rod (a) is mounted inside the hydraulic cylinder (w), the knock return valve and the knock overflow valve are respectively arranged on both sides inside the hydraulic cylinder (w), the impact piston (u) is located outside the bottom of the hydraulic cylinder (w), and the positioning piston (t) is mounted below the impact piston (u); a confluence seat (q), a tilting overflow valve (r), and a tilting overflow piston (s) are mounted at the bottom of the oil pump, and a multi-channel oil pipe is installed between the bottom of the oil pump and the hydraulic cylinder (w).
2. A power trim device according to claim 1, characterized in that: The trim system realizes the up-tilt action of the outboard motor by opening the up-tilt circuit suction port (i) and the down-tilt circuit pressure control valve (f) and closing the manual drain valve.
3. A power trim device according to claim 1, characterized in that: The tilting circuit realizes the tilting action of the outboard motor by closing the trim hydraulic cylinder (w) and the manual drain valve and opening the tilting circuit pressure control valve (n).
4. A power trim device according to claim 1, characterized in that: The tilt down circuit realizes the tilt down action of the outboard motor by opening the longitudinal tilt hydraulic cylinder (w) and the tilt up circuit pressure control valve (n), as well as opening the tilt down circuit pressure control valve (f).
5. A power trim device according to claim 1, characterized in that: The trim system realizes the manual lifting and lowering of the outboard motor by opening and closing the manual relief valve and connecting and disconnecting the manifold (q).
6. A power trim device according to any one of claims 1 to 5, characterized in that: If the trim system leaks, first close the manual relief valve, and then check the manual relief valve. When the manual relief valve and O-ring are damaged, they need to be replaced. When there is no problem with the manual relief valve and O-ring, clean the manual relief valve and then install it back.
7. A power trim device according to any one of claims 1 to 5, characterized in that: If the trim system leaks, remove the tilt relief valve (r) and check whether the O-ring and seal have any foreign matter and / or damage. If there is any foreign matter or damage, replace the tilt relief valve (r); if there is no problem with the tilt relief valve (r) and the O-ring, clean the tilt relief valve (r) and then install it back.
8. A power trim device according to any one of claims 1 to 5, characterized in that: When the outboard motor cannot remain in the tilted position when reversing or is pulled out during high-speed deceleration, first check the manual drain valve. If the manual drain valve and O-ring are OK, clean the manual drain valve and install the valve back to its original position, or replace the manual drain valve and O-ring. When the trim system cannot withstand reverse thrust, remove the piston rod assembly and check whether there is any debris and / or impact ball stuck.