Reaction force type electro-hydraulic actuator

Abstract

The application discloses a reaction force type electro-hydraulic actuating device, which comprises a shell, wherein at least the following components are arranged inside the shell: a counterweight assembly and an actuating cylinder; an actuating shaft, one end of the actuating shaft is fixedly connected with the counterweight assembly, and the other end of the actuating shaft is a free end, which is used for transmitting hydraulic power and realizing axial reciprocating motion; an actuating plate, which is attached to the inner peripheral wall of the actuating cylinder, and a through hole is arranged on the actuating plate and used for allowing the actuating shaft to pass through, and the actuating plate is used for separating the inside of the actuating cylinder into a first actuating cavity and a second actuating cavity. The application adopts hydraulic oil reciprocating motion as a power source, thereby improving the output efficiency of large actuating force and the feasibility of design. In addition, the hydraulic driving mode of the application fundamentally eliminates the risk of using electricity, so that the system operation is safer and more reliable. Meanwhile, the simple structure design can reduce the probability of fault occurrence.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical vibration control and test, and particularly relates to a reaction force type electro-hydraulic actuator. BACKGROUND

[0002] At present, the active vibration absorption technology has achieved preliminary application results in high-tech fields such as aerospace and ship, and has shown excellent performance in the vibration control of small and medium-sized equipment. However, with the continuous progress of science and technology and the increasing complexity of industrial development, the demand for vibration control is also increasing, and the control object gradually extends from small and medium-sized equipment to large equipment. This change puts forward higher challenges to the active vibration absorption technology, especially how to realize the output of large actuating force in a limited space to cope with the line spectrum vibration problem of large equipment, which has become the focus and difficulty of current research.

[0003] The traditional electromagnetic actuator is difficult to realize a large actuating force output in a limited space, and is difficult to meet the demand of vibration control of large equipment. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a reaction force type electro-hydraulic actuator.

[0005] To solve the above technical problems, the basic idea of the technical scheme adopted by the present application is as follows: a reaction force type electro-hydraulic actuator, comprising: a shell, the shell is internally provided with a counterweight, an actuator cylinder and an actuator, and comprises a separation part; one end of the actuator extends out of the actuator cylinder and is fixedly connected with the counterweight;

[0006] The separation part is attached to the inner peripheral wall of the actuator cylinder, and is used to separate the inside of the actuator cylinder into an upper first chamber and a lower second chamber, and the actuator is driven to do axial reciprocating motion by introducing hydraulic medium into the first chamber and the second chamber.

[0007] Further, the outer peripheral wall of the first chamber is provided with a first hydraulic pipe in communication;

[0008] The outer peripheral wall of the second chamber is provided with a second hydraulic pipe in communication;

[0009] The first hydraulic pipe and the second hydraulic pipe are used for the flow of hydraulic medium, so as to form a hydraulic pressure difference between the first chamber and the second chamber, and drive the actuator to do axial reciprocating motion.

[0010] Further, the electro-hydraulic actuator further comprises: a hydraulic system;

[0011] The hydraulic system is in communication with the first hydraulic pipe and the second hydraulic pipe, respectively.

[0012] Further, the installation base is provided with the actuating cylinder,

[0013] An adjusting assembly is arranged between the actuating cylinder and the installation base, for adjusting the distance between the actuating member and the installation base.

[0014] Further, a through hole is arranged in the middle of the adjusting assembly, and the diameter of the through hole is greater than the outer diameter of one end of the actuating member.

[0015] Further, the outer diameter of the adjusting assembly is less than or equal to the outer diameter of the actuating cylinder.

[0016] Further, the shell further comprises a guide rod;

[0017] One end of the guide rod is fixedly connected with the installation base, and the other end of the guide rod extends through the counterweight to the top of the shell.

[0018] Further, at least two guide rods are arranged symmetrically with the actuating member as the center.

[0019] Further, the guide rod and the counterweight are connected through a bearing.

[0020] Further, the shell further comprises a limiting plate arranged at the top of the guide rod, and the limiting plate is fixedly connected with the guide rod.

[0021] After adopting the above technical scheme, the present application has the following beneficial effects compared with the prior art.

[0022] The actuating force of the present application directly comes from the hydraulic oil in the hydraulic cylinder to drive the actuating shaft to perform axial reciprocating motion, completely abandoning the complex electromagnetic circuit design of the traditional reaction force type electromagnetic actuating mechanism. The present application not only simplifies the structure, but also eliminates the need for an internal heat dissipation system. Under the same volume limitation, a larger scale actuating counterweight can be integrated, thereby significantly improving the output capacity of the actuating force and the design flexibility, and meeting the needs of more extensive and more demanding application scenarios.

[0023] In addition, compared with traditional electromagnetic or piezoelectric actuators, the overall architecture of the present application is more concise, fundamentally avoiding potential electrical risks such as overcurrent and overpressure, greatly improving the safety and reliability of equipment operation. In addition, the simplified design directly reduces the complexity and cost of installation, daily operation and later maintenance, bringing users a more economical and efficient use experience, and helping to achieve lower total cost of ownership.

[0024] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are part of the specification, serve to further understand the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, but do not constitute undue limitations on the present application. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained from these drawings by those of ordinary skill in the art without creative labor. In the drawings:

[0026] Fig. 1 is a sectional view of a reaction force type electro-hydraulic actuator of the present application;

[0027] Fig. 2 is a side view of a reaction force type electro-hydraulic actuator of the present application;

[0028] Fig. 3 is a side view of a reaction force type electro-hydraulic actuator of the present application from another angle;

[0029] BRIEF DESCRIPTION OF DRAWINGS: 1, housing; 2, limiting plate; 3, counterweight; 4, hydraulic pipe; 41, first hydraulic pipe; 42, second hydraulic pipe; 5, actuator assembly; 51, partition; 52, actuator shaft; 6, actuator cylinder; 61, first chamber; 62, second chamber; 7, guide rod; 8, bearing; 9, adjusting assembly; 91, through hole; 10, base.

[0030] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0032] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Embodiment 1

[0035] As Figs. 1-3 shown, a reaction force type electro-hydraulic actuator, a reaction force type electro-hydraulic actuator, comprising: a housing 1, the housing 1 is provided with a counterweight 3, an actuator 6, an actuator 5, one end of the actuator 5 extends out of the actuator 6 and is fixedly connected with the counterweight 3; the transmission member 5 includes a partition 51; the partition 51 is attached to the inner wall of the actuator 6, which is used to separate the actuator 6 into an upper first chamber 61 and a lower second chamber 62, and the hydraulic medium is introduced into the first chamber 61 and the second chamber 62 to drive the actuator 5 to move axially reciprocatingly.

[0036] Specifically, the housing 1 adopts high-strength, corrosion-resistant alloy material, for example: stainless steel or aluminum alloy, to ensure that the structure remains stable under the influence of internal high pressure and external environment. The housing 1 is provided with high-quality sealing flange or O-ring at both ends, which ensures the sealing of the internal hydraulic system and prevents leakage of hydraulic medium. In addition, the counterweight 3 adopts materials with large density and good stability, such as lead or iron alloy; considering the balance and stability of the device, the overall shape of the counterweight 3 is designed according to the shape of the housing 1.

[0037] In this embodiment, the counterweight 3 and the actuator 5 are fixedly connected by high-strength bolts or welding, which ensures that they do not fall off during high-speed movement, and the diameter of the counterweight 3 is greater than the outer diameter of the actuator. The actuator also includes an actuator shaft 52, one end of which is fixedly connected with the counterweight 3, and the other end is a free end. The hydraulic medium is introduced into the first chamber 61 and the second chamber 62 to drive the actuator shaft 52 to move axially reciprocatingly, and the counterweight 3 moves axially reciprocatingly with the actuator 5. The counterweight 3 generates a reaction force to act on the actuator object through the actuator shaft 5, the adjusting assembly 9, and the base 10, thereby realizing the output of electro-hydraulic actuating force.

[0038] In a feasible implementation, the outer peripheral wall of the first chamber 61 is provided with a first hydraulic pipe 41; the outer peripheral wall of the second chamber 62 is provided with a second hydraulic pipe 42; the first hydraulic pipe 41 and the second hydraulic pipe 42 are used for flowing hydraulic medium, so as to form a hydraulic pressure difference between the first chamber 61 and the second chamber 62, thereby driving the actuator 5 to perform axial reciprocating motion.

[0039] In the embodiment, the electro-hydraulic actuator further comprises a hydraulic system, which is in communication with the first hydraulic pipe 41 and the second hydraulic pipe 42, respectively.

[0040] In a feasible implementation, the electro-hydraulic actuator further comprises a mounting base 10, and the actuator cylinder 6 is fixedly arranged on the mounting base 10, and an adjusting assembly 9 is arranged between the actuator cylinder 6 and the mounting base 10, which is used for adjusting the distance between the actuator 5 and the mounting base 10.

[0041] In the embodiment, at least four screw holes are arranged on the mounting base 10, which are used for fixedly connecting the actuator cylinder 6 through bolts, so as to ensure stable operation under high-speed and high-load working conditions. The adjusting assembly 9 is arranged between the actuator cylinder 6 and the mounting base 10, and adopts a precise lead screw, a slide rail or an adjusting bolt structure, which allows a user to adjust the distance between the actuator 5 and the mounting base 10 by adjusting the height of the adjusting assembly 9 according to actual requirements. The present application enhances the flexibility and adaptability of the device, so that it can be applied to workpieces or test environments of different sizes.

[0042] In the embodiment, the hydraulic system is integrated near the electro-hydraulic actuator, which is convenient for maintenance and repair. The hydraulic system internally contains key components such as a hydraulic pump, an oil tank, a filter, a pressure control valve and the like, which are connected with the first hydraulic pipe 41 and the second hydraulic pipe 42 through high-pressure oil pipes. When the hydraulic system works, the hydraulic pump sends the hydraulic medium in the oil tank into the first hydraulic pipe 41 and the second hydraulic pipe 42 through the high-pressure oil pipes. By controlling the servo control valve of the hydraulic system, the pressure and flow of the hydraulic medium entering the first chamber 61 and the second chamber 62 can be independently adjusted. When the hydraulic pressure in the first chamber 61 is higher than that in the second chamber 62, the hydraulic pressure difference drives the actuator 5 to move in one direction along the axial direction; otherwise, when the hydraulic pressure in the second chamber 62 is higher than that in the first chamber 61, the actuator 5 moves in the opposite direction. The design of the adjusting assembly 9 makes the device easily adapt to workpieces or test environments of different sizes and shapes, thereby improving the versatility and flexibility of the device. In addition, the integrated design of the hydraulic system and the selection of high-strength and corrosion-resistant materials improve the reliability and durability of the device, and facilitate daily maintenance and repair.

[0043] In the present embodiment, the middle part of the adjusting assembly 9 is provided with a through hole 91, the aperture of the through hole 91 is larger than the outer diameter of the actuator shaft 52 of the actuator 5. The actuator shaft 52 is allowed to slide freely in the through hole 91, while maintaining sufficient clearance to prevent friction and jamming, thereby achieving the axial reciprocating motion of the actuator 5. This sliding fit reduces the frictional resistance and improves the motion efficiency.

[0044] In the present embodiment, the adjusting assembly 9 has an outer diameter less than or equal to the outer diameter of the actuator cylinder 6.

[0045] In a feasible embodiment, the shell 1 further comprises guide rods 7, one end of the guide rods 7 is fixedly connected with the mounting base 10, and the other end of the guide rods 7 extends through the counterweight 3 to the top of the shell 1. The guide rods 7 are provided in at least two, and the at least two guide rods are symmetrically arranged around the actuator 5. The bottom of the guide rod 7 is connected with the mounting base 10 by threading and bolts, and extends through the counterweight 3.

[0046] In the present embodiment, the guide rods 7 serve as key components connecting the mounting base 10, the counterweight 3, and the top of the shell 1, and provide additional support for the entire device. The support of the guide rods significantly enhances the structural stability of the device, and effectively prevents the device from shaking or deforming when the actuator 5 is moving at high speed and high load, ensuring the accuracy and reliability of the movement. Since the guide rods 7 are provided in at least two and symmetrically arranged around the actuator 5, they provide precise guidance for the reciprocating motion of the actuator 5. The guiding effect of the actuator 5 enables the actuator 5 to move along the predetermined trajectory, avoiding errors caused by deviation or shaking, and improving the accuracy and stability of the movement. In the present embodiment, the guide rods 7 enhance the impact resistance of the device, which can absorb and disperse these impact energies to a certain extent, protecting the internal key components from damage.

[0047] In the embodiment, the guide rod 7 is connected with the counterweight 3 through a bearing 8. The bearing 8 serves as a connecting piece between the guide rod 7 and the counterweight 3, which reduces the friction and wear during the relative movement of the two, thus helping to prolong the service life of the guide rod 7 and the counterweight 3. In addition, the bearing 8 can ensure that the movement track of the guide rod 7 in the counterweight 3 remains stable. Since the rolling bodies inside the bearing 8 can smoothly roll between the inner and outer rings, the guide rod 7 is not prone to deviation or shaking during movement, thereby improving the movement accuracy of the entire device; the bearing 8 further enhances the support effect on the counterweight 3 by connecting the guide rod 7 and the counterweight 3. The bearing 8 can bear certain radial and axial loads, ensuring that the counterweight 3 remains stable during actuation and does not deform or displace due to uneven stress.

[0048] In a feasible embodiment, the shell 1 further comprises a limiting plate 2 arranged at the top of the guide rod 7. The limiting plate 2 is used to enhance the structural stability of the guide rod 7 while limiting the extreme displacement of the counterweight 3, thereby reducing the risk of the counterweight 3 flying out of the shell 1. In addition, the limiting plate 2 is fixedly connected with the guide rod 7.

[0049] When the counterweight 3 moves along the guide rod 7, the limiting plate 2 can share part of the stress, reducing the risk of deformation or damage of the guide rod 7 due to uneven stress. In addition, the limiting plate 2 is arranged at the top of the guide rod 7, which sets an explicit upper limit position for the movement of the counterweight 3. When the counterweight 3 approaches or reaches this upper limit position during movement, the limiting plate 2 will prevent it from moving upward, thereby effectively preventing the risk of the counterweight 3 flying out of the shell 1 due to excessive movement. The present application improves the safety and reliability of the equipment.

[0050] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the technical solution of the present application, and equivalent embodiments with equivalent changes are equivalent. The embodiments in the above-mentioned embodiments can be further combined or replaced, but as long as it does not deviate from the technical solution of the present application, any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A reaction force type electro-hydraulic actuating device, characterized in that: include: A housing (1), wherein a counterweight (3), an actuating cylinder (6), and an actuating member (5) are provided inside the housing (1), including a partition (51); One end of the actuating member (5) extends out of the actuating cylinder (6) and is fixedly connected to the counterweight member (3); The partition (51) is fitted with the inner peripheral wall of the actuating cylinder (6) and is used to divide the interior of the actuating cylinder (6) into an upper first chamber (61) and a lower second chamber (62), and to drive the actuating member (5) to perform axial reciprocating motion by introducing a hydraulic medium into the first chamber (61) and the second chamber (62); a first hydraulic pipe (41) is provided in communication with the outer peripheral wall of the first chamber (61); The outer peripheral wall of the second chamber (62) is connected to a second hydraulic pipe (42); The first hydraulic pipe (41) and the second hydraulic pipe (42) are used for allowing hydraulic medium to flow through, so as to form a hydraulic pressure difference between the first chamber (61) and the second chamber (62), so as to drive the actuator (5) to perform axial reciprocating motion; The electro-hydraulic actuating device further comprises: a hydraulic system; The hydraulic system is communicated with the first hydraulic pipe (41) and the second hydraulic pipe (42) respectively; A mounting base (10), wherein the actuator (6) is fixedly mounted on the mounting base (10). An adjustment assembly (9) is provided between the actuating cylinder (6) and the mounting base (10) for adjusting the distance between the actuating member (5) and the mounting base (10); A through hole (91) is provided in the middle of the adjustment component (9), and the diameter of the through hole (91) is larger than the outer diameter of one end of the actuating member (5); The housing (1) further comprises: a guide rod (7); One end of the guide rod (7) is fixedly connected to the mounting base (10), and the other end of the guide rod (7) passes through the counterweight (3) and extends to the top of the shell (1); A limit plate (2) is provided on the top of the guide rod (7), and the limit plate (2) is fixedly connected to the guide rod (7).

2. The reaction force type electro-hydraulic actuating device according to claim 1, characterized in that: The outer diameter of the adjusting component (9) is smaller than or equal to the outer diameter of the actuating cylinder (6).

3. The reaction force type electro-hydraulic actuating device according to claim 1, characterized in that: At least two guide rods (7) are provided, and the at least two guide rods are symmetrically arranged with the actuating member (5) as the center.

4. The reaction force type electro-hydraulic actuating device according to claim 3, characterized in that: The guide rod (7) is connected to the counterweight (3) via a bearing.

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