Electro-hydraulic servo actuator convenient to maintain

Abstract

The utility model relates to the technical field of fluid transmission, in particular to an electro-hydraulic servo actuator convenient to maintain, which comprises an electromagnetic rotating component and a reciprocating piston component, a mounting plate is fixedly arranged on a shell and is connected with a support through bolts, a dust cover matched with the electromagnetic rotating component is arranged on the support, and the reciprocating piston component is connected with the mounting plate through bolts. The dust cover is fixedly provided with a positioning column, a fixing mechanism is arranged between the mounting plate and the positioning column, the lower end of the support is rotationally provided with a bottom plate, an angle adjusting mechanism is arranged between the bottom plate and the support, and the positioning column of the dust cover and the dust cover are fixed by arranging the fixing mechanism. And when disassembly is needed, force is applied to the top cap or the guide rod to enable the guide rod to move downwards, the fixing piece and the limiting part are driven to move downwards to be separated from the insertion groove in the positioning column, the dust cover can be taken down, maintenance of the electromagnetic rotating assembly is facilitated, and damage to installation equipment caused by falling of the fixing piece such as a screw is also avoided.

Description

Technical Field

[0001] This utility model relates to the field of fluid transmission technology, and in particular to an electro-hydraulic servo actuator that is easy to maintain. Background Technology

[0002] Electro-hydraulic servo actuators are mainly used in industries with high precision, high response, and large loads to achieve various force loading. In the testing industry, electro-hydraulic servo actuators are used for various loading tests simulating load forms of components in the automotive and aerospace fields. In the metallurgical industry, electro-hydraulic servo actuators are used in electric furnace control systems, rolling mill control systems, open-hearth furnace charging, converter control, blast furnace control, strip misalignment and constant tension devices, etc. In construction machinery, hydraulic transmission is widely used, such as in excavators, tire loaders, truck cranes, tracked bulldozers, tire cranes, self-propelled scrapers, graders and vibratory rollers, etc. In the automotive industry, hydraulic off-road vehicles, hydraulic dump trucks, hydraulic aerial work platforms and fire trucks all use hydraulic technology.

[0003] Existing electro-hydraulic servo actuators typically employ an electromagnetic rotating structure to drive a rotary piston, which in turn drives a reciprocating piston. This reciprocating piston adjusts the position of its outer oil channel, allowing it to extend and retract under hydraulic pressure. For example, Chinese Patent Publication No. CN118442368A discloses "An Electro-hydraulic Servo Actuator for Exoskeleton Robots," which uses a magnetic circuit mechanism to deflect an armature based on the principle of electromagnetism, causing the rotary piston to rotate. The rotary piston and the reciprocating piston are connected by a guide groove, allowing for simultaneous rotation or relative sliding. When the rotary piston rotates, the reciprocating piston also rotates. The right seal, piston sleeve, and reciprocating piston form two sealed cavities. When the reciprocating piston rotates clockwise, the piston rod extends under the pressure difference; when the reciprocating piston rotates counterclockwise, the piston rod retracts under the pressure difference.

[0004] The electromagnetic rotating structure is easily affected by dust and may malfunction. To prevent dust, a dust cover is usually installed to protect the electromagnetic rotating structure. However, in actual use, the dust cover and the electro-hydraulic servo actuator are usually fixed with screws. After long-term use, the screws may rust and strip, making it impossible to disassemble and affecting maintenance. Furthermore, the small screws that are removed during maintenance are easy to lose and fall into the equipment where the electro-hydraulic servo actuator is installed, causing damage to the equipment. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the electromagnetic rotating structure being easily affected by dust, the screw fixing dust cover being rusted and stripped, making it impossible to disassemble for inspection and maintenance, and the easy loss of disassembled screws causing damage to the equipment where the electro-hydraulic servo actuator is installed. Therefore, this invention proposes an electro-hydraulic servo actuator that is easy to maintain.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design an easy-to-maintain electro-hydraulic servo actuator, including an electromagnetic rotary assembly and a reciprocating piston assembly. The reciprocating piston assembly includes a housing, a reciprocating piston rod, and a rotating rod. The rotating rod is poweredly connected to the electromagnetic rotary assembly. A mounting plate is fixedly mounted on the housing. A bracket is bolted to the mounting plate. A dust cover that mates with the electromagnetic rotary assembly is mounted on the bracket. A positioning post is fixedly mounted on the dust cover. A positioning hole that mates with the positioning post is formed on the mounting plate. A fixing mechanism is provided between the mounting plate and the positioning post. A base plate is rotatably mounted at the lower end of the bracket. An angle adjustment mechanism is provided between the base plate and the bracket.

[0008] Furthermore, the fixing mechanism includes a fixing member that cooperates with the positioning column, and the mounting plate has a lifting groove that cooperates with the fixing member. A spring that cooperates with the fixing member is provided in the lifting groove.

[0009] Furthermore, a limiting part is fixedly provided at the upper end of the fixing member, and a slot that cooperates with the limiting part is provided on the positioning post, and an inclined surface is provided on one side of the limiting part.

[0010] Furthermore, a guide rod is fixedly connected to the upper end of the fastener, and the upper end of the guide rod passes through the mounting plate and is fixedly connected to a top cap.

[0011] Furthermore, the angle adjustment mechanism includes a connecting rod rotatably connected to the bracket, and a slider is rotatably connected to the other end of the connecting rod. A groove that cooperates with the slider is provided on the base plate.

[0012] Furthermore, a screw threadedly connected to the slider is rotatably disposed within the groove, and a knob poweredly connected to the screw is rotatably disposed on the base plate.

[0013] The electro-hydraulic servo actuator proposed in this utility model is easy to maintain and has the following advantages:

[0014] In this utility model, a fixing mechanism is set to fix the positioning post and the dust cover of the dust cover. When disassembly is required, force is applied to the top cap or guide rod to make the guide rod move down, which drives the fixing part and the limiting part to move down and separate from the slot on the positioning post, so that the dust cover can be removed. This facilitates the maintenance of the electromagnetic rotating component and also avoids damage to the installed equipment caused by the loosening of screws and other fixing parts.

[0015] Secondly, in this utility model, the output angle of the electro-hydraulic servo actuator is adjusted by setting an angle adjustment mechanism. When using it, the top plate is first connected to the installation equipment, and the output angle of the electro-hydraulic servo actuator can be adjusted by rotating the knob, which facilitates calibration and connection and improves the applicability of the electro-hydraulic servo actuator. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an electro-hydraulic servo actuator that is easy to maintain, as proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the dust cover of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the fastener of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting rod of this utility model;

[0020] Figure 5 This is a schematic diagram of the limiting part of this utility model.

[0021] In the diagram: 1. Electromagnetic rotating assembly; 2. Reciprocating piston assembly; 21. Housing; 22. Reciprocating piston rod; 23. Rotating rod; 3. Mounting plate; 4. Bracket; 5. Dust cover; 51. Positioning post; 6. Fixing mechanism; 61. Fixing component; 62. Lifting groove; 63. Limiting part; 64. Guide rod; 7. Base plate; 8. Angle adjustment mechanism; 81. Connecting rod; 82. Slider; 83. Screw; 84. Knob. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-5An easy-to-maintain electro-hydraulic servo actuator includes an electromagnetic rotating assembly 1 and a reciprocating piston assembly 2. The reciprocating piston assembly 2 includes a housing 21, a reciprocating piston rod 22, and a rotating rod 23. The rotating rod 23 is poweredly connected to the electromagnetic rotating assembly 1. A mounting plate 3 is fixedly installed on the housing 21. A bracket 4 is bolted to the mounting plate 3. A dust cover 5 that cooperates with the electromagnetic rotating assembly 1 is installed on the bracket 4. A positioning post 51 is fixedly installed on the dust cover 5. A positioning hole that cooperates with the positioning post 51 is opened on the mounting plate 3. A fixing mechanism 6 is provided between the mounting plate 3 and the positioning post 51. A base plate 7 is rotatably installed at the lower end of the bracket 4. An angle adjustment mechanism 8 is provided between the base plate 7 and the bracket 4.

[0024] In this invention, the positioning post and dust cover are fixed by the fixing mechanism 6, allowing the dust cover 5 to be removed for easy maintenance of the electromagnetic rotating assembly. Since no screws or other fasteners that need to be disassembled are required for fixing, damage to the installed equipment caused by the loosening of screws or other fasteners is avoided. The output angle of the electro-hydraulic servo actuator can be adjusted by the angle adjustment mechanism 8, which facilitates the provision of power to connection structures at different angles, improves the applicability of the electro-hydraulic servo actuator, and reduces the installation difficulty of the electro-hydraulic servo actuator.

[0025] Furthermore, in this embodiment, the fixing mechanism 6 includes a fixing member 61 that cooperates with the positioning post 51. The mounting plate 3 has a lifting groove 62 that cooperates with the fixing member 61. A spring that cooperates with the fixing member 61 is provided in the lifting groove. By moving the fixing member 61 down to separate it from the positioning post 51, the dust cover 5 can be removed to inspect and maintain the electromagnetic rotating assembly 1.

[0026] Furthermore, in this embodiment, a limiting part 63 is fixedly provided at the upper end of the fixing member 61, and a slot that cooperates with the limiting part 63 is provided on the positioning post 51. An inclined surface is provided on one side of the limiting part 63. When the dust cover 5 is installed, the positioning post 51 abuts against the inclined surface of the limiting part 63, and applies a downward force to the fixing member 61, so that the downward movement of the fixing member 61 will not hinder the installation of the dust cover 5.

[0027] It should be noted that, in this embodiment, the upper end of the fixing member 61 is fixedly connected to the guide rod 64, the upper end of the guide rod 64 passes through the mounting plate 3 and is fixedly connected to the top cap. Applying force to the top cap or the guide rod causes the guide rod 64 to move down, which drives the fixing member 61 and the limiting part 63 to move down and separate from the slot on the positioning post 51, so that the dust cover 5 can be removed, which is convenient for the maintenance of the electromagnetic rotating assembly 1.

[0028] Furthermore, in this embodiment, the angle adjustment mechanism 8 includes a connecting rod 81 rotatably connected to the bracket 4, and a slider 82 rotatably connected to the other end of the connecting rod 81. A groove is provided on the base plate 7 to cooperate with the slider 82. When the slider 82 moves, it drives the position and angle of the connecting rod 81 and the slider 82 to change, thereby driving the bracket 4 to rotate and changing the output angle of the bracket 4 and the reciprocating piston assembly 2.

[0029] More specifically, in this embodiment, a screw 83 is rotatably provided in the groove and threadedly connected to the slider 82. A knob 84 is rotatably provided on the base plate 7 and poweredly connected to the screw 83. By rotating the knob 84, the screw 83 is rotated, which drives the slider 82 to move, thereby changing the position and angle of the connecting rod 81 and the slider 82.

[0030] Working method: During operation, the electromagnetic rotating assembly 1 drives the rotating rod 23 to rotate, which in turn drives the reciprocating piston assembly 2 to rotate. Under the action of oil pressure, it performs reciprocating telescopic motion. The positioning post and dust cover of the dust cover are fixed by the fixing mechanism 6, and the dust cover 5 can be removed for easy maintenance of the electromagnetic rotating assembly. Applying force to the top cap or guide rod causes the guide rod 64 to move down, which drives the fixing part 61 and the limiting part 63 to move down and separate from the slot on the positioning post 51, so that the dust cover 5 can be removed. By rotating the knob 84, the screw 83 is rotated, which drives the slider 82 to move, which changes the position and angle of the connecting rod 81 and the slider 82, thereby driving the bracket 4 to rotate and changing the output angle of the bracket 4 and the reciprocating piston assembly 2.

[0031] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0032] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this patent application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0035] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A convenient-to-maintain electro-hydraulic servo actuator, comprising an electromagnetic rotary assembly (1) and a reciprocating piston assembly (2), characterized in that, The reciprocating piston assembly (2) includes a housing (21), a reciprocating piston rod (22), and a rotating rod (23). The rotating rod (23) is poweredly connected to the electromagnetic rotating assembly (1). A mounting plate (3) is fixedly installed on the housing (21). A bracket (4) is bolted to the mounting plate (3). A dust cover (5) that cooperates with the electromagnetic rotating assembly (1) is installed on the bracket (4). A positioning post (51) is fixedly installed on the dust cover (5). A positioning hole that cooperates with the positioning post (51) is opened on the mounting plate (3). A fixing mechanism (6) is provided between the mounting plate (3) and the positioning post (51). A base plate (7) is rotatably installed at the lower end of the bracket (4). An angle adjustment mechanism (8) is provided between the base plate (7) and the bracket (4).

2. The easily maintainable electro-hydraulic servo actuator according to claim 1, characterized in that: The fixing mechanism (6) includes a fixing member (61) that cooperates with the positioning column (51), and a lifting groove (62) that cooperates with the fixing member (61) is provided in the mounting plate (3). A spring that cooperates with the fixing member (61) is provided in the lifting groove.

3. The easily maintainable electro-hydraulic servo actuator according to claim 2, characterized in that: The upper end of the fastener (61) is fixedly provided with a limiting part (63), and the positioning post (51) is provided with a slot that cooperates with the limiting part (63). One side of the limiting part (63) is provided with an inclined surface.

4. The easily maintainable electro-hydraulic servo actuator according to claim 2, characterized in that: The upper end of the fastener (61) is fixedly connected to a guide rod (64), and the upper end of the guide rod (64) passes through the mounting plate (3) and is fixedly connected to a top cap.

5. The easily maintainable electro-hydraulic servo actuator according to claim 1, characterized in that: The angle adjustment mechanism (8) includes a connecting rod (81) rotatably connected to the bracket (4), and a slider (82) rotatably connected to the other end of the connecting rod (81). A groove is provided on the base plate (7) to cooperate with the slider (82).

6. The easily maintainable electro-hydraulic servo actuator according to claim 5, characterized in that: A screw (83) is rotatably disposed in the groove and threadedly connected to the slider (82), and a knob (84) is rotatably disposed on the base plate (7) and poweredly connected to the screw (83).

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