Gear pump for power trim device

Abstract

The utility model relates to the technical field of lifting devices, and discloses a gear pump for a power trim device, which comprises the power trim device, a motor, a gear pump component, a confluence seat, a hydraulic cylinder and an impact push rod. According to the gear pump for the power trim device, when the trim switch is closed at the declination position, oil flows out of the hydraulic cylinder from the updip cavity and flows back to the pump through the updip loop pressure control valve which is opened and closed. And when the impact push rod reaches the maximum stroke, the oil pressure in the declination cavity is increased until the declination loop pressure control overflow valve is opened, and the oil is shunted back to the oil storage device. When the trim button is loosened, the pump stops supplying oil, the declination loop pressure control valve and the updip loop pressure control valve are closed, and if the declination loop pressure control valve and the updip loop pressure control valve are opened, the declination loop pressure control overflow valve is closed. The closed valve locks the working liquid on the two sides of the impact push rod, so that the outboard engine is kept at the set position, and the effects that the pressurization efficiency is higher, the pressure intensity is larger, pressure relief is avoided, and meanwhile the outboard engine can be kept at the set position are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, in particular to a gear pump used for a power trim device. Background Art

[0002] As is well known, military assault boats, speedboats, civilian small boats, etc. all use an external propulsion device at the rear end of the hull, referred to as an outboard motor. The outboard 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 outboard motor is located outside the rear end of the hull and is axially connected to the side of the ship.

[0003] The tilter has a built-in power trim system, which consists of an electric motor, a pressurized reservoir, a pump and a trim hydraulic cylinder. There is a switch on the remote control (or trim control panel). It is used to tilt the outboard up or down, and is also used to tilt the outboard up when sailing at low speed in shallow water or towing. Whether the engine is running under load or in the stopped state, it can be trimmed up or down.

[0004] Hydraulic equipment is widely used in industrial and civil sectors; the function of the hydraulic system's actuators, hydraulic cylinders and hydraulic motors, is to convert the pressure energy of the liquid into mechanical energy to obtain the required linear reciprocating motion or rotary motion; the components can be modified at will according to the desired designed action to achieve the desired work; the hydraulic lifting device is a more common type of hydraulic equipment, and people can use it in a series of environments such as material handling, equipment lifting and closing, equipment positioning, etc.

[0005] After the hydraulic lifters currently on the market complete the lifting, the lifted piece connected to the hydraulic lifter will be positioned at a certain lifting angle. Since the hydraulic lifter is no longer pressurized, pressure release will occur, causing the lifting angle of the lifted piece to gradually decrease, resulting in the lifted piece being unable to maintain a certain height and angle.

[0006] In view of the above situation, a gear pump with higher pressurization efficiency, greater pressure and no pressure relief is needed to achieve the low cost of the hydraulic lifter while keeping the lifted piece at a certain height and angle. Utility Model Content

[0007] The utility model aims to provide a gear pump for a power trim device to solve the problems raised in the above background technology.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: a gear pump for a power trim device, comprising a power trim device, an electric motor is installed above the power trim device, a gear pump assembly is fixedly connected below the electric motor, a manifold is installed below the gear pump assembly, a hydraulic cylinder is fixedly connected to one side of the manifold, and an impact push rod is installed on the inner wall of the hydraulic cylinder;

[0009] The gear pump assembly includes a housing, an oil pump gear is rotatably connected inside the housing, a downtilt circuit pressure-controlled overflow valve is installed on the inner wall of the housing, a downtilt circuit pressure control valve is fixedly connected to the lower inner wall of the housing, a reciprocating valve and an uptilt circuit pressure-controlled valve are fixedly connected to the lower inner wall of the housing, and an oil filling port cover is screwed to one side of the housing.

[0010] Preferably, an upward-inclined circuit suction port and a downward-inclined circuit suction port are provided on the inner wall of the shell, and steel balls are slidably connected to the upward-inclined circuit suction port and the downward-inclined circuit suction port.

[0011] Preferably, the housing is fixedly connected below the motor, the motor output shaft is fixedly connected to the oil pump gear, and a sealing ring is fixedly connected at the connection between the housing and the motor.

[0012] Preferably, filters are fixedly connected to the left and right sides of the up-inclined circuit suction port and the down-inclined circuit suction port.

[0013] Preferably, the interior of the shell is filled with oil from an oil reservoir, the lower portion of the shell is fixedly connected to the busbar, and a sealing ring is fixedly connected at the connection.

[0014] Preferably, the downtilt circuit pressure-controlled overflow valve is fixedly connected above the uptilt circuit suction port, and a sealing ring is fixedly connected at the connection, and the downtilt circuit pressure-controlled overflow valve is fixedly connected below the uptilt circuit suction port, and a sealing ring is fixedly connected at the connection.

[0015] Preferably, the reciprocating valve and the up-tilt circuit pressure control valve are both fixedly connected below the down-tilt circuit suction port, and a sealing ring is fixedly connected at the connection.

[0016] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0017] First, the utility model, when the trim switch is closed in the downtilt position, the motor will drag the oil pump gear in the opposite direction to rotate. 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 downtilt circuit suction port. The pump pushes the pressurized oil into the downtilt channel. The oil causes the reciprocating valve to slide into the uptilt circuit pressure control valve. 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 hydraulic cylinder to the oil pump. The oil returning from the uptilt chamber is supplied to the downtilt circuit. The steel ball 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 overflow valve and enters the downtilt channel in the manifold. The manifold channel connects the hydraulic cylinder to the top of the cylinder. The cavity above the impact push rod in the cylinder is the downtilt chamber. When the downtilt chamber is filled with oil, the impact push rod retracts into the cylinder to lower the external machine. The oil flows out of the hydraulic cylinder from the uptilt chamber and flows back to the pump through the stopped uptilt circuit pressure control valve. When the impact push rod reaches the maximum stroke, the oil pressure in the downtilt chamber increases until the downtilt circuit pressure control relief valve opens, diverting the oil back to the oil reservoir. When the trim button is released, the pump stops supplying oil, the downtilt circuit pressure control valve and the uptilt circuit pressure control valve close, and if opened, the downtilt circuit pressure control relief valve will close. The closed valve locks the working fluid on both sides of the impact push rod, keeping the outboard motor in the set position, achieving higher pressurization efficiency, greater pressure without pressure relief, and keeping the outboard motor in the set position.

[0018] Second, the utility model starts to drive the oil pump gear to rotate when the tilt switch is in the up-tilt position and the motor is turned on. The oil pump drives a small amount of oil through the suction port of the up-tilt circuit. The rotation of the oil pump gear pushes the oil into the channel of the up-tilt circuit. Under the action of the oil pressure, the reciprocating valve slides and supports the pressure control valve of the down-tilt circuit. The force of the reciprocating valve opens the pressure control valve of the down-tilt circuit, allowing the oil to flow into the oil pump from the down-tilt chamber of the hydraulic cylinder. The oil returning from the down-tilt chamber provides most of the oil required for the up-tilt circuit. The pressure of the oil forces the pressure control valve of the up-tilt circuit to open, allowing the oil to enter the channel in the manifold seat leading to the up-tilt chamber of the hydraulic cylinder. As the amount of oil entering the hydraulic cylinder increases, the impact push rod extends upward to lift the external machine. The oil flows out through the side of the hydraulic cylinder and enters the channel of the manifold seat. The oil is sucked into the oil pump through the opened down-tilt circuit pressure control valve and then supplied to the suction port of the up-tilt circuit, so as to facilitate the lifting of the external machine and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional exploded structure of the motor, gear pump assembly and manifold seat of the utility model;

[0020] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of the hydraulic cylinder and the impact push rod of the utility model;

[0021] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the enlarged structure of the overall section A of the utility model.

[0023] Among them: 1. Electric motor; 2. Gear pump assembly; 3. Manifold; 4. Hydraulic cylinder; 5. Impact push rod; 21. Housing; 211. Inlet of uptilt circuit; 212. Inlet of downtilt circuit; 213. Filter; 22. Oil pump gear; 23. Pressure-controlled overflow valve of downtilt circuit; 24. Pressure control valve of downtilt circuit; 25. Reciprocating valve; 26. Pressure-controlled valve of uptilt circuit; 27. Oil filling port cover. DETAILED DESCRIPTION

[0024] The specific implementation of the utility model will be further described in detail below with reference to the accompanying drawings.

[0025] A gear pump for a power trim device in this specific embodiment, such as Figure 1-4 As shown, it includes a power trim device, an electric motor 1 is installed above the power trim device, a gear pump assembly 2 is fixedly connected below the electric motor 1, a manifold 3 is installed below the gear pump assembly 2, a hydraulic cylinder 4 is fixedly connected to one side of the manifold 3, and an impact push rod 5 is installed on the inner wall of the hydraulic cylinder 4;

[0026] The gear pump assembly 2 includes a housing 21, an oil pump gear 22 is rotatably connected inside the housing 21, a downtilt circuit pressure-controlled overflow valve 23 is installed on the inner wall of the housing 21, a downtilt circuit pressure control valve 24 is fixedly connected to the inner wall below the housing 21, a reciprocating valve 25 and an uptilt circuit pressure-controlled valve 26 are fixedly connected to the inner wall below the housing 21, and an oil filling port cover 27 is screwed to one side of the housing 21.

[0027] Through the above technical solution, when the trim switch is closed in the downtilt position, the motor 1 will drag the oil pump gear 22 in the opposite direction to rotate. The oil pump gear 22 rotates in the opposite direction, and the flow direction of the oil is also reversed. The oil enters the oil pump gear 22 through the filter 213 and the downtilt circuit suction port 212. The pump pushes the pressurized oil into the downtilt channel. The oil causes the reciprocating valve 25 to slide into the uptilt circuit pressure control valve 26. The force of the reciprocating valve 25 opens the uptilt circuit pressure control valve 26, allowing the oil to flow back to the oil pump from the uptilt chamber of the hydraulic cylinder 4. The oil refluxed from the uptilt chamber is supplied to the downtilt circuit. The steel ball in the uptilt circuit suction port 211 blocks the oil from flowing back to the oil reservoir. The pressurized oil opens the downtilt circuit pressure control overflow valve 23 and enters the downtilt channel in the manifold seat 3. The manifold seat 3 channel connects the hydraulic cylinder 4 to the cylinder top. The cavity above the impact push rod 5 in the cylinder is the downtilt chamber. When the downtilt chamber is filled with oil, the impact push rod 5 retracts into the cylinder to lower the outboard motor. The oil flows out of the hydraulic cylinder 4 from the uptilt chamber and flows back to the pump through the stopped uptilt circuit pressure control valve 26. When the impact push rod 5 reaches the maximum stroke, the oil pressure in the downtilt chamber increases until the downtilt circuit pressure control relief valve 23 opens to divert the oil back to the oil reservoir. When the trim button is released, the pump stops supplying oil, the downtilt circuit pressure control valve 24 and the uptilt circuit pressure control valve 26 are closed, and if they are opened, the downtilt circuit pressure control relief valve 23 will be closed. The closed valve locks the working fluid on both sides of the impact push rod 5, keeping the outboard motor in a predetermined position, achieving higher pressurization efficiency, greater pressure and no pressure relief, while keeping the outboard motor in a predetermined position;

[0028] When the trim switch is in the up-tilt position, the motor 1 starts to drive the oil pump gear 22 to rotate, and the oil pump drives a small amount of oil through the up-tilt circuit suction port 211. The rotation of the oil pump gear 22 pushes the oil into the channel of the up-tilt circuit. Under the action of the oil pressure, the reciprocating valve 25 slides and supports the down-tilt circuit pressure control valve 24. The force of the reciprocating valve 25 opens the down-tilt circuit pressure control valve 24, allowing the oil to flow into the oil pump from the down-tilt chamber of the hydraulic cylinder 4. The oil refluxed from the down-tilt chamber provides most of the oil required for the up-tilt circuit. The oil pressure forces the up-tilt circuit pressure control valve 26 to open so that the oil enters the channel leading to the up-tilt chamber of the hydraulic cylinder 4 in the manifold seat 3. As the amount of oil entering the hydraulic cylinder 4 increases, the impact push rod 5 extends upward to lift the external machine. The oil flows out through the side of the hydraulic cylinder 4 and enters the channel of the manifold seat 3. The oil is sucked into the oil pump through the opened down-tilt circuit pressure control valve 24 and then supplied to the up-tilt circuit suction port 211, so as to facilitate the lifting of the external machine and improve the efficiency.

[0029] Specifically, an upward-inclined circuit suction port 211 and a downward-inclined circuit suction port 212 are formed on the inner wall of the shell 21 , and steel balls are slidably connected to the upward-inclined circuit suction port 211 and the downward-inclined circuit suction port 212 .

[0030] Through the above technical solution, the oil is connected through the upward circuit suction port 211 and the downward circuit suction port 212. Steel balls are slidably connected at the upward circuit suction port 211 and the downward circuit suction port 212. The oil in the upward circuit suction port 211 is blocked by the steel balls at the downward circuit suction port 212 and cannot flow back into the oil storage tank.

[0031] Specifically, the housing 21 is fixedly connected below the motor 1 , the output shaft of the motor 1 is fixedly connected to the oil pump gear 22 , and a sealing ring is fixedly connected at the connection between the housing 21 and the motor 1 .

[0032] Through the above technical solution, the internal circuit connection of the motor 1 is the existing technology, which will not be described in detail here. When the trim switch is turned on in the up-tilt position, the motor 1 starts to drive the oil pump gear 22 to rotate, and the oil pump drives a small amount of oil through the up-tilt circuit suction port 211. The rotation of the oil pump gear 22 pushes the oil into the channel of the up-tilt circuit. A sealing ring is fixedly connected at the connection between the housing 21 and the motor 1 to prevent oil leakage. The oil filling port cover 27 facilitates the filling of the oil inside the housing 21.

[0033] Specifically, filters 213 are fixedly connected to the left and right sides of the up-tilt circuit suction port 211 and the down-tilt circuit suction port 212 .

[0034] Through the above technical solution, a small amount of oil is driven by the oil pump to pass through the filter 213 and the inlet 211 of the tilt circuit, and the filter 213 filters the oil. When the trim switch is closed in the downtilt position, the motor 1 will drag the oil pump gear 22 in the opposite direction to rotate. The oil pump gear 22 rotates in the opposite direction, and the flow direction of the oil is also reversed. The oil enters the oil pump gear 22 through the filter 213 and the downtilt circuit inlet 212.

[0035] Specifically, the interior of the housing 21 is filled with oil in the oil reservoir, and the lower portion of the housing 21 is fixedly connected to the busbar 3 , and a sealing ring is fixedly connected at the connection.

[0036] Through the above technical solution, the housing 21 is filled with oil in the oil reservoir, which facilitates the pushing of the impact push rod 5. The housing 21 is fixedly connected to the manifold seat 3 at the bottom, and a sealing ring is fixedly connected at the connection to prevent oil leakage. The rotation of the oil pump gear 22 pushes the oil into the channel of the upward tilt circuit. Under the action of oil pressure, the reciprocating valve 25 slides to support the downward tilt circuit pressure control valve 24. The force of the reciprocating valve 25 opens the downward tilt circuit pressure control valve 24, allowing oil to flow into the oil pump from the downward tilt chamber of the hydraulic cylinder 4. The oil refluxed from the downward tilt chamber provides most of the oil required for the upward tilt circuit. The pressure of the oil forces the upward tilt circuit pressure control valve 26 to open so that the oil enters the channel of the manifold seat 3 leading to the upward tilt chamber of the hydraulic cylinder 4. As the amount of oil entering the hydraulic cylinder 4 increases, the impact push rod 5 extends upward to lift the external machine. The oil flows out through the side of the hydraulic cylinder 4 and enters the channel of the manifold seat 3. The oil is sucked into the oil pump through the opened downward tilt circuit pressure control valve 24 and then supplied to the upward tilt circuit suction port 211.

[0037] Specifically, the downtilt circuit pressure-controlled overflow valve 23 is fixedly connected above the uptilt circuit suction port 211, and a sealing ring is fixedly connected at the connection. The downtilt circuit pressure-controlled overflow valve 23 is fixedly connected below the uptilt circuit suction port 211, and a sealing ring is fixedly connected at the connection.

[0038] Through the above technical solution, when the trim switch is closed in the downtilt position, the motor 1 will drag the oil pump gear 22 in the opposite direction to rotate. The oil pump gear 22 rotates in the opposite direction, and the flow direction of the oil is also reversed. The oil enters the oil pump gear 22 through the filter 213 and the downtilt circuit suction port 212. The pump pushes the pressurized oil into the downtilt channel. The oil causes the reciprocating valve 25 to slide into the uptilt circuit pressure control valve 26. The force of the reciprocating valve 25 opens the uptilt circuit pressure control valve 26, allowing the oil to flow back from the uptilt chamber of the hydraulic cylinder 4 to the oil pump. The oil refluxed from the uptilt chamber is supplied to the downtilt circuit. The steel ball in the uptilt circuit suction port 211 blocks the oil from flowing back to the oil reservoir. The pressurized oil opens the downtilt circuit pressure control overflow valve 23 and enters the downtilt channel in the manifold seat 3. The manifold seat 3 channel connects the hydraulic cylinder 4 to the cylinder top. The cavity above the impact push rod 5 in the cylinder is the downtilt chamber. When the downtilt chamber is filled with oil, the impact push rod 5 retracts into the cylinder and lowers the outboard motor. The oil flows out of the hydraulic cylinder 4 from the uptilt chamber and flows back to the pump through the stopped uptilt circuit pressure control valve 26. When the impact push rod 5 reaches the maximum stroke, the oil pressure in the downtilt chamber increases until the downtilt circuit pressure control relief valve 23 opens and diverts the oil back to the oil reservoir. When the trim button is released, the pump stops supplying oil, the downtilt circuit pressure control valve 24 and the uptilt circuit pressure control valve 26 are closed, and if they are opened, the downtilt circuit pressure control relief valve 23 will be closed. The closed valves lock the working fluid on both sides of the impact push rod 5, keeping the outboard motor in a predetermined position.

[0039] Specifically, the reciprocating valve 25 and the up-tilt circuit pressure control valve 26 are both fixedly connected below the down-tilt circuit suction port 212, and a sealing ring is fixedly connected at the connection.

[0040] Through the above technical solution, the reciprocating valve 25 is slid under the action of oil pressure to support the downtilt circuit pressure control valve 24. The force of the reciprocating valve 25 opens the downtilt circuit pressure control valve 24, which is convenient for controlling the inflow and outflow of oil through oil pressure.

[0041] 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 gear pump for a power trim device, comprising a power trim device, characterized in that: An electric motor (1) is installed above the power trim device, a gear pump assembly (2) is fixedly connected below the electric motor (1), a manifold (3) is installed below the gear pump assembly (2), a hydraulic cylinder (4) is fixedly connected to one side of the manifold (3), and an impact push rod (5) is installed on the inner wall of the hydraulic cylinder (4); The gear pump assembly (2) comprises a housing (21), an oil pump gear (22) is rotatably connected inside the housing (21), a downtilt circuit pressure-controlled overflow valve (23) is installed on the inner wall of the housing (21), a downtilt circuit pressure-controlled valve (24) is fixedly connected to the lower inner wall of the housing (21), a reciprocating valve (25) and an uptilt circuit pressure-controlled valve (26) are fixedly connected to the lower inner wall of the housing (21), and an oil filling port cover (27) is screwed to one side of the housing (21).

2. The gear pump for a power trim device according to claim 1, characterized in that: An upward-inclined circuit suction port (211) and a downward-inclined circuit suction port (212) are provided on the inner wall of the shell (21), and steel balls are slidably connected to the upward-inclined circuit suction port (211) and the downward-inclined circuit suction port (212).

3. The gear pump for a power trim device according to claim 1, characterized in that: The housing (21) is fixedly connected below the motor (1); the output shaft of the motor (1) is fixedly connected to the oil pump gear (22); and a sealing ring is fixedly connected at the connection between the housing (21) and the motor (1).

4. The gear pump for a power trim device according to claim 2, characterized in that: Filters (213) are fixedly connected to the left and right sides of the up-tilt circuit suction port (211) and the down-tilt circuit suction port (212).

5. The gear pump for a power trim device according to claim 1, characterized in that: The shell (21) is filled with oil from an oil reservoir, and the lower part of the shell (21) is fixedly connected to the collector seat (3), and a sealing ring is fixedly connected at the connection point.

6. The gear pump for a power trim device according to claim 2, characterized in that: The down-tilt circuit pressure-controlled overflow valve (23) is fixedly connected above the up-tilt circuit suction port (211), and a sealing ring is fixedly connected at the connection; the down-tilt circuit pressure-controlled overflow valve (23) is fixedly connected below the up-tilt circuit suction port (211), and a sealing ring is fixedly connected at the connection.

7. The gear pump for a power trim device according to claim 2, characterized in that: The reciprocating valve (25) and the up-tilt circuit pressure control valve (26) are both fixedly connected below the down-tilt circuit suction port (212), and a sealing ring is fixedly connected at the connection point.

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