Piston for power trim device

Abstract

The utility model relates to the technical field of power trim devices, and discloses a piston for a power trim device, which comprises a power trim pump body, a piston mechanism is arranged in the power trim pump body, the piston mechanism comprises an impact piston, the outer surface of the impact piston is sleeved with a first annular ring repairing sleeve, and the first annular ring repairing sleeve is sleeved with a second annular ring repairing sleeve. An impact push rod is sleeved with the impact piston, a first thread is formed in the outer surface of the bottom of the impact push rod, a positioning piston is in threaded connection with the outer portion of the first thread, a second annular ring repairing sleeve is sleeved with the outer surface of the positioning piston, and a mounting assembly is arranged on the outer portion of the impact push rod. According to the power trim device, the piston, the impact piston and the positioning piston are located at the bottom of the outer surface of the impact push rod, the hydraulic cylinder cover is located at a cylinder opening of the hydraulic cylinder body and is installed in a sealed mode through the three repairing sleeves, oil cannot leak when entering the hydraulic cylinder body, and the effect that upward or downward trim of an outboard engine is more stable is achieved.

Description

Technical Field

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

[0002] At present, small boats all use outboard propulsion equipment at the rear end of the hull, which is referred to as an outboard motor. 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 outside the rear end of the hull and axially connected to the side of the boat. When in use, most of the outboard motor is located at the lower end of the boat bottom. Due to the uneven river bottom, there are many protruding reefs and debris in the river. When the boat is traveling at high speed, the propulsion propeller hits the reefs and debris and is destroyed. On the other hand, the traditional outboard motor cannot adjust the optimal propulsion angle of the propulsion propeller, which makes the boat slow and consumes more energy. The power trim device (gas-liquid tilter) can adjust the optimal propulsion angle of the propulsion propeller and also has an anti-collision protection function.

[0003] Existing power trim devices will reduce the stability of some variable-speed boats if they are tilted outward too much, causing instability during speed change, which may lead to momentary instability of the boat body. The shaking may easily cause damage to the personnel in the boat body. Improvements are made to the push rod in the hydraulic cylinder of the power trim device to make the power trim device more stable when tilting. Utility Model Content

[0004] The utility model aims to provide a piston for a power trim device, so as to solve the problem in the above background technology that the power trim device tilts outward too much, which will reduce the stability of some variable-speed boats and make them unstable during speed change, and may cause the boat body to be unstable for a moment, and the shaking may easily cause damage to the personnel in the boat body.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a piston for a power trim device, comprising a power trim pump body, a piston mechanism is arranged inside the power trim pump body, and a hydraulic pump mechanism is arranged outside the piston mechanism.

[0006] The piston mechanism includes an impact piston, the outer surface of the impact piston is sleeved with an annular ring repair sleeve 1, the interior of the impact piston is sleeved with an impact push rod, the bottom outer surface of the impact push rod is provided with a thread 1, the external thread of the thread 1 is connected to a positioning piston, the outer surface of the positioning piston is sleeved with an annular ring repair sleeve 2, and an installation component is arranged on the outside of the impact push rod.

[0007] Preferably, the installation assembly comprises a hydraulic cylinder head, and an annular ring repair sleeve three is sleeved on the outer surface of the hydraulic cylinder head.

[0008] Preferably, the hydraulic cylinder cover is arranged on the outer surface of the impact push rod, and a second thread is formed at the bottom of the outer surface of the hydraulic cylinder cover.

[0009] Preferably, a mounting sleeve is provided on the top of the impact push rod, and a mounting shaft is provided inside the mounting sleeve.

[0010] Preferably, the hydraulic pump mechanism comprises a hydraulic cylinder body, a manifold seat is provided at the bottom of the hydraulic cylinder body, and a motor pump assembly is installed on one side of the manifold seat.

[0011] Preferably, the top of the inner wall of the hydraulic cylinder body is threadedly connected to the outside of the hydraulic cylinder cover, and the hydraulic cylinder body is arranged outside the impact piston.

[0012] Preferably, an upper cavity is provided on the outside of the hydraulic cylinder body, and a pressure overflow channel is provided on one side of the hydraulic cylinder body.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] First, the utility model has an impact piston and a positioning piston located at the bottom of the outer surface of the impact push rod, which are installed inside the hydraulic cylinder body. The top of the outer surface of the impact push rod is sleeved with a hydraulic cylinder cover, so that the impact push rod can be installed inside the hydraulic cylinder body with the help of a thread 2 opened on the outer surface of the hydraulic cylinder cover, so that the impact piston and the positioning piston are located at the bottom of the outer surface of the impact push rod, and the hydraulic cylinder cover is located at the cylinder mouth of the hydraulic cylinder body and is sealed with three repair sleeves, so that oil can enter the interior of the hydraulic cylinder body without oil leakage, so that the outboard motor can tilt upward or downward more stably.

[0015] Second, when the motor pump assembly of the utility model is working, the oil enters the inner bottom of the hydraulic cylinder body through the cavity at the bottom of the manifold, pushing the impact push rod to rise. When the impact push rod needs to be lowered, the motor pump assembly controls the oil to enter the inner top of the hydraulic cylinder body from the upper cavity, so that the impact piston drives the impact push rod to descend, and the oil flows back to the motor pump assembly from the cavity at the bottom of the manifold, and the impact push rod descends, thereby achieving the effect of stably delivering oil pressure to enable the power trim device to stably tilt the outboard motor upward or downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of the structure of the utility model;

[0017] Figure 2 This is an enlarged schematic diagram of structure A of the utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the piston mechanism of the utility model structure;

[0019] Figure 4 It is a three-dimensional schematic diagram of the hydraulic cylinder body of the utility model structure.

[0020] Among them: 1. Power trim pump body; 2. Piston mechanism; 201. Impact piston; 202. Annular ring repair set 1; 203. Impact push rod; 204. Positioning piston; 205. Annular ring repair set 2; 3. Hydraulic pump mechanism; 301. Hydraulic cylinder body; 302. Manifold seat; 303. Motor pump assembly; 4. Installation assembly; 401. Hydraulic cylinder head; 402. Annular ring repair set 3; 5. Thread 2; 6. Installation sleeve; 7. Installation shaft; 8. Upper cavity; 9. Pressure overflow channel. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides the following technical solutions:

[0023] Embodiment 1

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 A piston for a power trim device comprises a power trim pump body 1, a piston mechanism 2 is arranged inside the power trim pump body 1, and a hydraulic pump mechanism 3 is arranged outside the piston mechanism 2.

[0025] The piston mechanism 2 includes an impact piston 201, the outer surface of the impact piston 201 is sleeved with an annular ring repair sleeve 202, the interior of the impact piston 201 is sleeved with an impact push rod 203, the bottom outer surface of the impact push rod 203 is provided with a thread 1, the external thread of the thread 1 is connected to a positioning piston 204, the outer surface of the positioning piston 204 is sleeved with an annular ring repair sleeve 205, and an installation component 4 is arranged on the outside of the impact push rod 203.

[0026] The mounting assembly 4 comprises a hydraulic cylinder cover 401 , and an annular ring repair sleeve 402 is sleeved on the outer surface of the hydraulic cylinder cover 401 .

[0027] The hydraulic cylinder cover 401 is arranged on the outer surface of the impact push rod 203 , and a thread 25 is formed on the bottom of the outer surface of the hydraulic cylinder cover 401 .

[0028] A mounting sleeve 6 is disposed on the top of the impact push rod 203 , and a mounting shaft 7 is disposed inside the mounting sleeve 6 .

[0029] Through the above technical scheme, when the power trim device is used, two repair sleeves are arranged on the outer surface of the piston mechanism 2, which can be tightly fitted into the inside of the hydraulic cylinder body 301, so that oil will not leak, and the impact push rod 203 inside the hydraulic cylinder body 301 runs more stably. The hydraulic pump mechanism 3 is provided with two oil inlet and outlet cavities, which can transport oil more stably. The mounting shaft 7 in the mounting sleeve 6 installed on the top of the impact push rod 203 can connect the impact push rod 203 in the hydraulic cylinder body 301 of the power trim device to the outboard motor, and the impact piston 201 is sleeved on the impact push rod 203. The outer surface of the impact piston 201 is sleeved with an annular repair sleeve 202, and the outer surface of the part of the bottom of the impact push rod 203 that passes through the impact piston 201 is provided with a thread 1, so that the positioning piston 204 can be installed on the outside of the thread 1, so that the positioning piston 204 is located at the impact piston 20 1, the outer surface of the positioning piston 204 is also sleeved with an annular ring repair sleeve 205, the two pistons are located at the bottom of the outer surface of the impact push rod 203, and are installed in the interior of the hydraulic cylinder body 301. The top of the outer surface of the impact push rod 203 is sleeved with a hydraulic cylinder cover 401, so that the impact push rod 203 can be installed in the interior of the hydraulic cylinder body 301 with the help of a thread 25 opened on the outer surface of the hydraulic cylinder cover 401. The outer surface of the hydraulic cylinder cover 401 is also provided with an annular ring repair sleeve 3 402 to seal the mouth of the hydraulic cylinder body 301, so that the impact piston 201 and the positioning piston 204 are located at the bottom of the outer surface of the impact push rod 203, and the hydraulic cylinder cover 401 is located at the cylinder mouth of the hydraulic cylinder body 301. Three repair sleeves are used for airtight installation, so that oil can enter the interior of the hydraulic cylinder body 301 without oil leakage, so that the outboard motor can tilt upward or downward more stably.

[0030] Embodiment 2

[0031] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 On the basis of the first embodiment, it is further obtained that the hydraulic pump mechanism 3 includes a hydraulic cylinder body 301 , a manifold seat 302 is provided at the bottom of the hydraulic cylinder body 301 , and a motor pump assembly 303 is installed on one side of the manifold seat 302 .

[0032] The top of the inner wall of the hydraulic cylinder body 301 is threadedly connected to the outside of the hydraulic cylinder cover 401 , and the hydraulic cylinder body 301 is arranged outside the impact piston 201 .

[0033] An upper cavity 8 is formed outside the hydraulic cylinder body 301 , and a pressure overflow channel 9 is formed on one side of the hydraulic cylinder body 301 .

[0034] Through the above technical solution, the internal circuit connection of the motor pump assembly 303 is a prior art, and its working principle is common knowledge of the staff in this field, which will not be repeated here. Two inlet and outlet cavities are opened on the outside of the hydraulic cylinder body 301, and the motor pump assembly 303 can provide oil to the hydraulic cylinder body 301. In the upward tilt state, when the impact push rod 203 extends from the hydraulic cylinder body 301, when the motor pump assembly 303 is working, the oil enters the inner bottom of the hydraulic cylinder body 301 through the cavity at the bottom of the manifold seat 302, pushing the impact push rod 203 When the impact push rod 203 needs to be lowered, the motor pump assembly 303 controls the oil to enter the top of the hydraulic cylinder body 301 from the upper cavity 8, so that the impact piston 201 drives the impact push rod 203 to descend, and the oil flows back to the motor pump assembly 303 from the bottom cavity of the manifold 302, and the impact push rod 203 is lowered, and the positioning piston 204 makes way or opens the pressure overflow channel 9. If necessary, the pressure overflow channel 9 is opened, and when the oil pressure is not enough to overcome the thrust of the propeller, the trim range is limited to less than the pressure overflow channel 9 and returns to the motor pump assembly 303. When the outboard engine speed decreases, or the engine is not in the normal state, the hydraulic cylinder body 301 can push the impact push rod 203 to rise into the tilting range, so as to achieve the effect of stably delivering oil pressure so that the power trim device can stably tilt the outboard engine upward or downward.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A piston for a power trim device, comprising a power trim pump body (1), characterized in that: A piston mechanism (2) is arranged inside the power trim pump body (1), and a hydraulic pump mechanism (3) is arranged outside the piston mechanism (2); The piston mechanism (2) comprises an impact piston (201), the outer surface of the impact piston (201) is sleeved with an annular ring repair sleeve (202), the interior of the impact piston (201) is sleeved with an impact push rod (203), the bottom outer surface of the impact push rod (203) is provided with a thread (1), the outer thread of the thread (1) is connected to a positioning piston (204), the outer surface of the positioning piston (204) is sleeved with an annular ring repair sleeve (205), and the outside of the impact push rod (203) is provided with a mounting assembly (4).

2. The piston for a power trim device according to claim 1, characterized in that: The installation assembly (4) comprises a hydraulic cylinder cover (401), and an annular ring repair sleeve (402) is sleeved on the outer surface of the hydraulic cylinder cover (401).

3. The piston for a power trim device according to claim 2, characterized in that: The hydraulic cylinder cover (401) is arranged on the outer surface of the impact push rod (203), and a second thread (5) is provided at the bottom of the outer surface of the hydraulic cylinder cover (401).

4. The piston for a power trim device according to claim 1, characterized in that: A mounting sleeve (6) is arranged on the top of the impact push rod (203), and a mounting shaft (7) is arranged inside the mounting sleeve (6).

5. The piston for a power trim device according to claim 1, characterized in that: The hydraulic pump mechanism (3) comprises a hydraulic cylinder body (301), a manifold seat (302) is arranged at the bottom of the hydraulic cylinder body (301), and a motor pump assembly (303) is installed on one side of the manifold seat (302).

6. The piston for a power trim device according to claim 5, characterized in that: The top of the inner wall of the hydraulic cylinder body (301) is threadedly connected to the outside of the hydraulic cylinder cover (401), and the hydraulic cylinder body (301) is arranged outside the impact piston (201).

7. The piston for a power trim device according to claim 5, characterized in that: An upper cavity (8) is provided on the outside of the hydraulic cylinder body (301), and a pressure overflow channel (9) is provided on one side of the hydraulic cylinder body (301).

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