Electro-hydraulic actuator

Abstract

The utility model provides an electro-hydraulic actuator, which belongs to the field of control mechanisms, and comprises two protection mechanisms, and any protection mechanism comprises a protection cover, a semi-circular opening is formed in the bottom side of the protection cover, and an electro-hydraulic actuator body is semi-wrapped by the protection cover; the fixed shell is arranged on the bottom side of the protective cover and comprises an outer shell body and an inner shell body, the outer shell body is fixedly connected with the protective cover through a supporting frame, the outer shell body and the inner shell body are connected through a damping spring, the inner shell body half wraps the shaft connecting flange, and L-shaped connecting pieces are fixed to the two sides of the outer shell body; the clamping sleeve is arranged on the bottom side of the fixed shell, and the two sides of the clamping sleeve are connected with the two L-shaped connecting pieces in a matched mode through first fixing bolts. According to the electro-hydraulic actuator, the electro-hydraulic actuator body does not make direct contact with the external protection cover, if the electro-hydraulic actuator body is impacted by the outside, the damping spring can reduce the influence of impact on the electro-hydraulic actuator through the buffering effect, meanwhile, the shaft connecting flange can well resist the impact of the outside, and the influence on the electro-hydraulic actuator body is reduced to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic control equipment, in particular to an electro-hydraulic actuator. Background Art

[0002] Actuators are devices used to drive and control valve operation. Actuators can be categorized into three main types: electric, pneumatic, and electro-hydraulic. Electro-hydraulic actuators transform a standard input signal into a corresponding 0- to 90-degree angular displacement torque or linear displacement force through electro-hydraulic conversion and hydraulic amplification.

[0003] Currently, most electro-hydraulic actuators are used exposed to the outside, and are easily affected by collisions with external objects and contamination by dust, which can easily damage the body and reduce its service life.

[0004] Prior art patent No. 202120236716.7 discloses an intelligent electric regulating valve with good protective effect, including a first protective cover, an electric regulating valve body and a second protective cover. The first protective cover and the second protective cover are both fixedly installed with a first sliding frame on the inner wall, and a limiting frame is movably installed on the inner side of the first sliding frame through a movable rod. The electric regulating valve body is clamped and fixed between the limiting frames, and the bottom of the electric regulating valve body is provided with a valve body extending from the first protective cover and the second protective cover, and the outer side of the valve body is clamped and fixed with a first jacket and a second jacket.

[0005] However, in the above technology, the electric control valve body is in direct force transmission contact with the second protective cover through the limit frame. Even if a spring is installed, the impact of external contact on the electric control valve body is inevitable, causing the body to be easily damaged and reducing its service life. Utility Model Content

[0006] In view of the above problems, the utility model provides an electro-hydraulic actuator.

[0007] An electro-hydraulic actuator comprises: two symmetrically arranged protection mechanisms, each protection mechanism comprising: a protection cover with a semicircular opening on the bottom side, half-wrapping the electro-hydraulic actuator body; a fixed shell, arranged on the bottom side of the protection cover, comprising an outer shell and an inner shell, both of which have a "C-shaped structure" in cross section, the outer shell being fixedly connected to the protection cover through a support frame, the outer shell and the inner shell being connected through a shock-absorbing spring, the inner shell half-wrapping an axial connection flange arranged in contact with the electro-hydraulic actuator, and L-shaped connectors being fixed on both sides of the outer shell; a jacket, arranged on the bottom side of the fixed shell, and wrapping the fixed valve, with both ends matched and connected to the two L-shaped connectors through a first fixing bolt.

[0008] In a preferred embodiment, the protection mechanism further includes: two connecting side plates, which are integrally arranged at the two edge ends of the outer shell and perpendicular to the contact surface of the outer shell. The adjacent two symmetrical connecting side plates of the two protection mechanisms are matched and connected by second fixing bolts.

[0009] In a preferred embodiment, the two adjacent protective covers of the two protective mechanisms further include: multiple protrusions evenly arranged at the edge of any protective cover; multiple grooves opened at the edge of the other protective cover, matching and snap-fitting with the multiple protrusions.

[0010] In a preferred embodiment, the vibration-damping springs of any protection mechanism are distributed outside the outer shell, including three vibration-damping springs on the top side of the outer shell, three vibration-damping springs on the bottom side, and five vibration-damping springs on the side wall.

[0011] In a preferred embodiment, the top and bottom sides of the outer shell further include two L-shaped through grooves, which are located at the edge ends of the top and bottom sides of the outer shell, are arranged to abut against the side walls of the outer shell, and one end passes through the outer shell.

[0012] In a preferred embodiment, the protection mechanism includes a sealing half ring, which is arranged on the bottom side of the protection cover and half-encloses the electro-hydraulic actuator body.

[0013] The entire structure of the electro-hydraulic actuator body of the present application does not have direct contact with the external protective cover. If it encounters an external impact, the force generated by the impact is transmitted to the shaft connecting flange through the protective cover, support frame, outer shell, shock-absorbing spring, and inner shell. During the force transmission process, the shock-absorbing spring can reduce the impact of the impact on the electro-hydraulic actuator through buffering. At the same time, the shaft connecting flange 201 can better resist external collisions and minimize the impact on the electro-hydraulic actuator body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other characteristics, features and advantages of the present invention will become clear by reading the following description of exemplary embodiments with reference to the accompanying drawings. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort.

[0015] Figure 1 Structural diagram of the electro-hydraulic actuator of this utility model;

[0016] Figure 2 A cross-sectional view of the electro-hydraulic actuator of the utility model;

[0017] Figure 3Installation side view of the utility model electro-hydraulic actuator;

[0018] Figure 4 Side view of the electro-hydraulic actuator of the utility model;

[0019] Figure 5 A full cross-sectional view of the AA position of the electro-hydraulic actuator of the utility model;

[0020] Figure 6 A half-section view of the electro-hydraulic actuator at position AA of the utility model;

[0021] Figure 7 The structural diagram of the main body of the electro-hydraulic actuator of this utility model;

[0022] Figure 8 An enlarged view of position B of the electro-hydraulic actuator of the present invention.

[0023] In the figure: 100, protection mechanism; 10, protection cover; 11, semicircular opening; 200, electro-hydraulic actuator body; 20, fixed housing; 21, outer housing; 22, inner housing; 23, support frame; 24, vibration damping spring; 30, L-shaped connector; 201, shaft connecting flange; 40, jacket; 202, valve; 31, first fixing bolt; 32, connecting side plate; 33, second fixing bolt; 12, protrusion; 13, groove; 25, L-shaped through groove; 14, sealing half circle. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be arbitrarily combined with each other.

[0025] The electro-hydraulic actuator is described in detail below with reference to the accompanying drawings and embodiments. Example

[0026] An electro-hydraulic actuator comprises: two symmetrically arranged protection mechanisms 100, each protection mechanism 100 comprising: a protection cover 10 with a semicircular opening 11 on the bottom side, half-wrapping the electro-hydraulic actuator body 200; a fixed shell 20, arranged on the bottom side of the protection cover 10, comprising an outer shell 21 and an inner shell 22, both of which have a "C-shaped structure" in cross section, the outer shell 21 being fixedly connected to the protection cover 10 via a support frame 23, the outer shell 21 and the inner shell 22 being connected via a damping spring 24, the inner shell 22 half-wrapping an axial connection flange 201 arranged in contact with the electro-hydraulic actuator, and L-shaped connectors 30 being fixed on both sides of the outer shell 21; a jacket 40, arranged on the bottom side of the fixed shell 20, wrapping the fixed valve 202, and having its two ends matched and connected to the two L-shaped connectors 30 via a first fixing bolt 31.

[0027] Installation steps of electro-hydraulic actuator for this application:

[0028] First, match and install the protective cover 10 and the fixed shell 20 of any protective mechanism 100 with the electro-hydraulic actuator body 200 and the shaft connecting flange 201 respectively, then match and install the jacket 40 with the fixed valve 202, and finally fix the L-shaped connector 30 on the fixed shell 20 with the jacket 40 through the first fixing bolt 31. The other protective mechanism 100 can be matched and installed in the above order.

[0029] The entire structure of the electro-hydraulic actuator body 200 does not have direct contact with the external protective cover 10. If it encounters an external impact, the force generated by the impact is transmitted to the shaft connecting flange 201 through the protective cover 10, the support frame 23, the outer shell 21, the shock-absorbing spring 24, and the inner shell 22. During the force transmission process, the shock-absorbing spring 24 can reduce the impact of the impact on the electro-hydraulic actuator through a buffering effect. At the same time, the shaft connecting flange 201 can better resist external collisions and minimize the impact on the electro-hydraulic actuator body 200.

[0030] The damping springs 24 of any protection mechanism 100 are located outside the outer shell 21 , including three damping springs 24 on the top side, three damping springs 24 on the bottom side, and five damping springs 24 on the side wall of the outer shell 21 . Example

[0031] Although Example 2 fixes the L-shaped connector 30 on the fixed shell 20 to the jacket 40 by the first fixing bolt 31, and the protection mechanism 100 has been fixed, this fixing method is still not firm. Therefore, Example 1 is improved to address this problem. The improvement includes that the protection mechanism 100 also includes: two connecting side plates 32, which are respectively integrally arranged at the two edge ends of the outer shell 21 and are perpendicular to the contact surface of the outer shell 21. The adjacent two symmetrical connecting side plates 32 of the two protection mechanisms 100 are matched and connected by a second fixing bolt 33.

[0032] During installation, the L-shaped connector 30 on the fixed housing 20 is first fixedly connected to the jacket 40 by the first fixing bolt 31, and then the connecting side plates 32 of the two protective mechanisms 100 are fixedly connected by the second fixing bolt 33, thereby improving the firmness of the device connection and preventing external impact on the electro-hydraulic actuator body 200. Example

[0033] Example 3 is an improvement on Example 1. The improvement includes that between two adjacent protective covers 10 of the two protective mechanisms 100, there are also: multiple protrusions 12, evenly arranged at the edge end of any protective cover 10; multiple grooves 13, opened at the edge end of the other protective cover 10, matching and snap-fitting with the multiple protrusions 12.

[0034] Among them, by providing a plurality of grooves 13 and matching and engaging with a plurality of protrusions 12, the two protective covers 10 can be matched and fixed, thereby avoiding the occurrence of misalignment of the protective covers 10 of the two protective mechanisms 100. Example

[0035] Example 4 is an improvement on Example 1. The improvement includes two L-shaped through grooves 25 on the top and bottom sides of the outer shell 21. The L-shaped through grooves 25 are located at the edge ends of the top and bottom sides of the outer shell 21, are arranged to abut against the side walls of the outer shell 21, and one end passes through the outer shell 21.

[0036] Among them, by opening the L-shaped through groove 25, the side plate of the outer shell 21 is separated from the top plate and the bottom plate, which can better install and fix the shell 20 and prevent the side plate and the top plate and the bottom plate from being affected by external impact. Example

[0037] Example 5 is an improvement on Example 1. The improvement includes that the protection mechanism 100 includes a sealing half ring 14 , which is arranged on the bottom side of the protection cover 10 and half-encloses the electro-hydraulic actuator body 200 .

[0038] The sealing half ring 14 is provided to prevent dust from entering the interior of the protective cover 10 from the bottom side, thereby reducing the impact of dust on the electro-hydraulic actuator body 200 .

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0040] The above embodiments are intended to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications and replacements shall be covered by the claims of the present invention.

Claims

1. An electro-hydraulic actuator, characterized in that: include: Two protection mechanisms (100) are symmetrically arranged, and each of the protection mechanisms (100) comprises: A protective cover (10) having a semicircular opening (11) on its bottom side, half-wrapping the electro-hydraulic actuator body (200); A fixed shell (20) is arranged on the bottom side of the protective cover (10), comprising an outer shell (21) and an inner shell (22), both of which are arranged in a "C-shaped structure" in cross section, wherein the outer shell (21) is fixedly connected to the protective cover (10) via a support frame (23), and the outer shell (21) and the inner shell (22) are connected via a damping spring (24), and the inner shell (22) half-wraps and contacts the shaft connection flange (201) provided on the electro-hydraulic actuator, and L-shaped connectors (30) are fixed on both sides of the outer shell (21); The jacket (40) is arranged on the bottom side of the fixed housing (20) and wraps the fixed valve (202), and its two ends are matched and connected with the two L-shaped connectors (30) through first fixing bolts (31).

2. The electro-hydraulic actuator according to claim 1, characterized in that: The protection mechanism (100) further includes: The two connecting side plates (32) are respectively integrally arranged at the two edge ends of the outer shell (21) and are arranged perpendicular to the contact surface of the outer shell (21). The adjacent two symmetrical connecting side plates (32) of the two protection mechanisms (100) are matched and connected by second fixing bolts (33).

3. The electro-hydraulic actuator according to claim 1, characterized in that: The two adjacent protection covers (10) of the two protection mechanisms (100) further include: A plurality of protrusions (12) are evenly arranged at the edge of any one of the protective covers (10); A plurality of grooves (13) are provided at the edge of another protective cover (10) and are matched with and fixed to the plurality of protrusions (12).

4. The electro-hydraulic actuator according to claim 1, characterized in that: The vibration-damping springs (24) of any of the protection mechanisms (100) are respectively located outside the outer shell (21), including three vibration-damping springs (24) located on the top side of the outer shell (21), three vibration-damping springs (24) located on the bottom side, and five vibration-damping springs (24) located on the side wall.

5. The electro-hydraulic actuator according to claim 1, characterized in that: The top and bottom sides of the outer shell (21) further comprise two L-shaped through grooves (25). The L-shaped through grooves (25) are located at the edge ends of the top and bottom sides of the outer shell (21), are arranged to abut against the side walls of the outer shell (21), and one end passes through the outer shell (21).

6. The electro-hydraulic actuator according to claim 1, characterized in that: The protection mechanism (100) comprises a sealing half ring (14) which is arranged on the bottom side of the protection cover (10) and half-encloses the electro-hydraulic actuator body (200).

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