A compact electro-hydraulic actuator for marine applications

Abstract

This utility model belongs to the field of electro-hydraulic actuators, specifically relating to a compact marine electro-hydraulic actuator, including a housing, a wheel and axle mechanism including a housing cover disposed at the front end of the housing, the middle of the housing cover being a through structure, the gear shaft being coaxial with the housing cover, a stop block being disposed at the front of the gear shaft, and a direction indicator being connected to one end passing through the housing cover; end caps are respectively disposed at both ends of the housing, and detachable mirror-finished cylinder tubes are symmetrically arranged in the inner cavity; a detachable and replaceable mirror-finished cylinder tube is disposed in the housing, the piston and rack are a single structure that moves synchronously left and right, moving along the left and right mirror-finished cylinder tube cavities during drive, the smooth wall of the mirror-finished cylinder tube fills the defects of the casting body having capillary pores, minimizing damage to the piston seals during swinging, greatly extending service life, if the mirror-finished cylinder tube is damaged, it can be directly replaced without replacing the main body, and can be reused repeatedly, solving the problem of inconvenient maintenance of electro-hydraulic actuators.

Description

Technical Field

[0001] This utility model relates to the field of electro-hydraulic actuators, specifically to a compact marine electro-hydraulic actuator. Background Technology

[0002] An electro-hydraulic actuator is a device that outputs angular or linear displacement through electro-hydraulic conversion and hydraulic amplification. It consists of an electro-hydraulic conversion module, a hydraulic amplification module, and the actuator body. It employs a servo control system and a closed-loop hydraulic circuit, achieving a positioning accuracy of up to 0.15% of the full stroke. It boasts advantages such as high integration, intelligent control, and fast response time.

[0003] Most existing electro-hydraulic actuators are one-piece structures, and the casting body has defects such as capillary pores, which can cause significant damage to the seals of the swing piston. When the piston is damaged, it cannot drive the operation normally. Its one-piece structure makes it inconvenient to disassemble and maintain when a fault occurs, resulting in maintenance inconvenience. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes a marine compact electro-hydraulic actuator, which features minimal piston damage and convenient disassembly and maintenance.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a marine compact electro-hydraulic actuator, including a housing, a wheel and axle mechanism including a housing cover disposed at the front end of the housing, the middle of the housing cover being a through structure, the gear shaft being coaxial with the housing cover, a stop being provided at the front of the gear shaft, and a direction indicator being connected to one end that passes through the housing cover;

[0008] The box body is provided with end caps at both ends, and detachable mirror-finished hydraulic cylinder pipes are symmetrically arranged in the inner cavity.

[0009] The drive mechanism includes pistons that move along the inner cavities of the two mirror cylinder tubes, a rack that meshes with the gear shaft is clamped between the two pistons, and a Gladius ring for auxiliary sealing is provided at the mating point between the piston and the mirror cylinder tube.

[0010] The hydraulic circuit mechanism includes an inlet pipe and an outlet pipe connected to the two mirror-finished hydraulic cylinder pipes.

[0011] Preferably, an auxiliary sealing support ring, an O-ring, and a gasket are provided in the clamping gap between the gear shaft and the housing.

[0012] Preferably, the end cap has an internal oil passage that mates with the oil inlet pipe or the oil outlet pipe, and the end of the oil passage is connected to the oil cavity of the mirror cylinder pipe.

[0013] Preferably, the end cap is screwed to an end cap bolt that penetrates into the housing.

[0014] Preferably, two Gladius rings are symmetrically arranged at the mating point between the piston and the mirror cylinder tube, and a piston support ring is arranged between the two Gladius rings.

[0015] Preferably, the angle adjustment mechanism includes angle adjustment nuts symmetrically arranged at the lower part of the housing, and an angle adjustment rod inserted into the inner cavity of the housing is installed on the angle adjustment nut. The inserted section of the angle adjustment rod contacts the tooth groove of the gear shaft.

[0016] Preferably, the lower part of the housing is equipped with a protruding grease nipple.

[0017] The above-mentioned technical solution of this utility model has the following beneficial technical effects: a detachable and replaceable mirror cylinder tube is provided in the housing, and the piston and rack are an integrated structure that moves synchronously left and right. During driving, it moves along the left and right mirror cylinder tube cavities. The smooth wall of the mirror cylinder tube fills the defect of capillary pores in the casting body, which reduces the damage to the piston seal during swinging and greatly improves the service life. If the mirror cylinder tube is damaged, it can be directly replaced without replacing the main body, and can be reused repeatedly, solving the problem of inconvenient maintenance of electro-hydraulic actuators. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a top view of the structure of this utility model.

[0021] Figure label:

[0022] 1. Housing; 21. Gear shaft; 22. Support ring; 23. O-ring; 24. Gasket; 25. Stop block; 26. Housing cover; 3. End cover; 31. End cover bolt; 4. Mirror-finish cylinder tube; 51. Rack; 52. Piston; 53. Glyd ring; 54. Piston support ring; 61. Oil inlet pipe; 62. Oil outlet pipe; 7. Grease nipple; 81. Adjusting nut; 82. Adjusting bolt rod; 9. Direction indicator. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0024] like Figure 1-3 As shown, the present invention proposes a marine compact electro-hydraulic actuator, including a housing 1, and a wheel and axle mechanism including a housing cover 26 disposed at the front end of the housing 1. The middle part of the housing cover 26 is a through structure. The gear shaft 21 is coaxial with the housing cover 26. A stop block 25 is provided at the front of the gear shaft 21, and a direction indicator 9 is connected to one end that passes through the housing cover 26.

[0025] The two ends of the housing 1 are respectively provided with end caps 3, and the inner cavity is symmetrically provided with detachable mirror cylinder pipes 4.

[0026] The drive mechanism includes a piston 52 that moves along the inner cavity of the two mirror cylinder tubes 4, a rack 51 that meshes with the gear shaft 21 between the two pistons 52, and a glyph 53 for auxiliary sealing at the joint between the piston 52 and the mirror cylinder tube 4.

[0027] The hydraulic circuit mechanism includes an oil inlet pipe 61 and an oil outlet pipe 62 connected to the two mirror cylinder pipes 4.

[0028] It should be noted that the clamping gap between the gear shaft 21 and the housing 1 is provided with an auxiliary seal support ring 22, an O-ring 23 and a gasket 24. The function of the support ring 22 is to support the gear shaft 21 and prevent it from radial runout or uneven wear during rotation, and to protect the O-ring 23 from excessive wear. The O-ring 23 is the main static seal and auxiliary dynamic seal. It is compressed in the sealing groove to prevent oil from leaking to the outside of the actuator housing 1. The gasket 24 is used to bear part of the axial force of the gear shaft 21.

[0029] In this embodiment, a detachable and replaceable mirror cylinder tube 4 is provided inside the housing 1. The piston 52 and rack 51 are an integrated structure that moves synchronously left and right. During driving, they move along the cavity of the left and right mirror cylinder tube 4. The smooth wall of the mirror cylinder tube 4 fills the defect of capillary pores in the casting body, which minimizes damage to the seal of the piston 52 during swinging and greatly improves its service life. If the mirror cylinder tube 4 is damaged, it can be directly replaced without replacing the main body and can be reused repeatedly. The piston 52 is provided with a Gladius ring assembly and a piston support ring 54 on the left and right to prevent wear on the Gladius ring 53, which drives the gear shaft 21 to rotate. The driving process is stable and causes less damage to the driving mechanism.

[0030] It is understandable that the end cap 3 has an internal oil passage that cooperates with the oil inlet pipe 61 or the oil outlet pipe 62, and the end of the oil passage is connected to the oil chamber of the mirror cylinder pipe 4; the oil inlet pipe 61 and the oil passage of the end cap form an oil inlet chamber that penetrates into the mirror cylinder pipe 4, and another set of oil outlet chambers is also set up. The piston 52 and rack 51 are driven to move left and right by the inlet and outlet of hydraulic oil to drive the fitted gear shaft 21 to rotate, thereby realizing the valve opening and closing control. Its external oil passage design makes it convenient to replace the mirror cylinder pipe 4 after the end cap 3 is disassembled.

[0031] To facilitate the disassembly of the end cover 3, the end of the end cover 3 is further screwed with an end cover bolt 31 that penetrates into the housing 1. The end cover bolt 31 and the bolt groove are set at the same angle on the edge of the end cover 3, which provides high installation stability.

[0032] To further protect the Glyd ring assembly, two Glyd rings 53 are symmetrically arranged at the mating point between the piston 52 and the mirror cylinder tube 4, and a piston support ring 54 is arranged between the two Glyd rings 53. The piston support ring 54 is located between the two Glyd rings 53 and serves to support the piston 52, preventing the piston 52 from eccentrically swinging or directly contacting the inner wall of the mirror cylinder tube 4 due to pressure fluctuations during reciprocating motion within the mirror cylinder tube 4. This reduces wear, ensures the coaxiality of the piston 52 and the mirror cylinder tube 4, and extends the lifespan of the Glyd rings 53 and the mirror cylinder tube 4.

[0033] In one embodiment, the angle adjustment mechanism includes angle adjustment nuts 81 symmetrically arranged at the lower part of the housing 1, and angle adjustment rods 82 that penetrate into the inner cavity of the housing 1 are installed on the angle adjustment nuts 81. The penetration section of the angle adjustment rods 82 contacts the tooth groove of the gear shaft 21.

[0034] The angle adjustment rod 82 is inserted into the inner cavity of the housing 1 to control the rotation angle of the gear shaft 21, thus serving as an external limit.

[0035] To facilitate the replenishment of grease into the housing 1, a protruding grease fitting 7 is further installed on the lower part of the housing 1.

[0036] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A compact electro-hydraulic actuator for marine vessels, characterized by The device includes a housing (1), and the wheel and axle mechanism includes a housing cover (26) disposed at the front end of the housing (1). The middle part of the housing cover (26) is a through structure. The gear shaft (21) is coaxial with the housing cover (26). A stop block (25) is provided at the front part of the gear shaft (21), and a direction indicator (9) is connected to one end that passes through the housing cover (26). The box body (1) is provided with end caps (3) at both ends, and detachable mirror cylinder pipes (4) are symmetrically arranged in the inner cavity; The drive mechanism includes a piston (52) that moves along the inner cavity of the two mirror cylinder tubes (4), a rack (51) that meshes with the gear shaft (21) is held between the two pistons (52), and a glyph (53) for auxiliary sealing is provided at the mating point between the piston (52) and the mirror cylinder tube (4). The oil circuit mechanism includes an oil inlet pipe (61) and an oil outlet pipe (62) connected to the two mirror cylinder pipes (4).

2. The marine compact electro-hydraulic actuator according to claim 1, characterized in that, A support ring (22), an O-ring (23), and a gasket (24) for auxiliary sealing are provided in the clamping gap between the gear shaft (21) and the housing (1).

3. A compact electro-hydraulic actuator for marine vessels according to claim 1, characterized in that, The end cap (3) has an internal oil passage that cooperates with the oil inlet pipe (61) or the oil outlet pipe (62), and the end of the oil passage is connected to the oil cavity of the mirror cylinder pipe (4). The end cap (3) is screwed to the end of the end cap (3) and inserted into the housing (1).

4. A compact electro-hydraulic actuator for marine vessels according to claim 1, characterized in that, Two Gladius rings (53) are symmetrically arranged at the mating point between the piston (52) and the mirror cylinder tube (4), and a piston support ring (54) is arranged between the two Gladius rings (53).

5. A compact electro-hydraulic actuator for marine vessels according to claim 1, characterized in that, The angle adjustment mechanism includes angle adjustment nuts (81) symmetrically arranged at the lower part of the housing (1), and angle adjustment rods (82) that penetrate into the inner cavity of the housing (1) are installed on the angle adjustment nuts (81). The penetration section of the angle adjustment rods (82) contacts the tooth groove of the gear shaft (21).

6. A compact electro-hydraulic actuator for marine vessels according to claim 1, characterized in that, The lower part of the housing (1) is fitted with a protruding grease nipple (7).

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