Electro-hydraulic push rod

Abstract

Electric hydraulic push rod. Relate to the field of mechanical transmission. Including base, the base is equipped with motor part and push rod part, the push rod part includes cylinder and piston rod, the cylinder is connected with the base through flange plate, the outer wall of the cylinder is equipped with movable support mechanism, the movable support mechanism is used for supporting the cylinder; The movable support mechanism includes sleeve, the sleeve can slide on the outer wall of the cylinder, the sleeve is equipped with connecting lug, the connecting lug is used for connecting anchor point. The application can reduce the stress of the cylinder and the piston rod, avoid its bending deformation, prolong its service life.

Description

Technical Field

[0001] This application relates to the field of mechanical transmission, specifically to an electro-hydraulic push rod. Background Technology

[0002] An electro-hydraulic actuator is a hydraulically driven manipulator that integrates mechanics, electricity, and hydraulics. It is suitable for reciprocating push-pull linear motion (or reciprocating rotation at a certain angle), and can also be used in places where lifting, lowering, or clamping of workpieces is required. It can also achieve centralized or automatic control in remote and dangerous areas.

[0003] Chinese patent document CN210637318U discloses a novel electro-hydraulic actuator. This novel electro-hydraulic actuator effectively improves the on-site installation efficiency of the electro-hydraulic actuator device through a split-type connection equipment method. Specifically, it discloses the split-structure actuator and hydraulic control device. A vertical positioning plate is welded and fixed to the hydraulic control device, and a horizontal connecting plate is welded and fixed to the other end of the vertical positioning plate. At least one pair of connecting U-shaped clips are also provided on the actuator, which pass through the horizontal connecting plate. A locking nut is also provided at the top of the connecting U-shaped clips. This novel electro-hydraulic actuator design effectively avoids economic losses and safety accidents caused by the failure of the electro-hydraulic actuator hydraulic control system, effectively improving the economic benefits of enterprises.

[0004] However, in the aforementioned patent, the overall height of the cylinder is relatively large. When the piston rod is fully extended, especially when the piston rod is under radial load, the piston rod and cylinder are subjected to large forces, which can easily cause bending deformation and affect the service life of the electro-hydraulic push rod. Utility Model Content

[0005] In order to overcome the problem that existing technologies are prone to bending deformation and thus affect service life, this application provides an electro-hydraulic push rod.

[0006] This application adopts the following technical solution: an electric hydraulic push rod, including a base, on which a motor part and a push rod part are provided, the push rod part includes a cylinder and a piston rod, the cylinder and the base are connected by a flange, and a movable support mechanism is provided on the outer wall of the cylinder, the movable support mechanism being used to support the cylinder;

[0007] The movable support mechanism includes a sleeve that can slide on the outer wall of the cylinder. The sleeve is provided with a connecting lug for connecting an anchor point.

[0008] Optionally, the outer wall of the cylinder is provided with a plurality of protruding ridges, which are spaced apart along the circumferential direction. The inner wall of the sleeve is provided with a plurality of sliding grooves, the number of which is the same as the number of protruding ridges. The plurality of protruding ridges are respectively and correspondingly inserted into the plurality of sliding grooves.

[0009] The protruding ridge is also provided with a plurality of limiting holes, which are spaced apart along the length of the protruding ridge. Limiting pins can be inserted into the limiting holes, and the limiting pins are used to limit the sleeve.

[0010] Optionally, the distance between two adjacent limiting holes is greater than or equal to the length of the sleeve, and a limiting pin is provided at both the top and bottom of the sleeve.

[0011] Optionally, a fixing ring is provided on the upper part of the outer wall of the cylinder, one end of each of the plurality of protruding ribs is fitted with the bottom of the fixing ring, and the other end of each of the plurality of protruding ribs is fitted with the top of the flange. The protruding ribs and the fixing ring are connected by bolts.

[0012] Optionally, the number of protruding ridges is not less than three, and the protruding ridges and the sliding grooves are all equally spaced.

[0013] Compared with the prior art, the movable support mechanism in this application supports the cylinder, reduces the force on the cylinder and piston rod, and avoids bending deformation, thereby reducing the bending deformation of the electro-hydraulic push rod, extending its service life, and at the same time, achieving the effect of reducing equipment maintenance costs and replacement frequency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this application. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of this application. Figure 2 ;

[0016] Figure 3 yes Figure 1 Enlarged structural reference diagram at point A;

[0017] Figure 4 It is a schematic 3D diagram of the bushing;

[0018] In the diagram: 1. Base; 2. Motor section; 3. Push rod section; 31. Cylinder; 311. Protruding rib; 3111. Limiting hole; 3112. Limiting pin; 312. Fixing ring; 3120. Bolt; 32. Piston rod; 33. Flange; 34. Movable support mechanism; 341. Sleeve; 3410. Slide groove; 342. Connecting lug. Detailed Implementation

[0019] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] like Figure 1-4 As shown, the electro-hydraulic actuator includes a base 1, a motor 2, a push rod 3, and a movable support mechanism 34. The motor 2 and the push rod 3 are mounted on the base 1. The cylinder 31 of the push rod 3 is connected to the base 1 via a flange 33. The movable support mechanism 34 is mounted on the outer wall of the cylinder 31 to support it. This arrangement effectively distributes the force on the piston rod 32 and the cylinder 31 when the piston rod 32 is extended and radially loaded, reducing the possibility of bending deformation and improving the service life of the electro-hydraulic actuator.

[0021] Specifically, the movable support mechanism 34 includes a sleeve 341 and a connecting lug 342. The sleeve 341 is made of a high-strength metal material, such as stainless steel or alloy steel, to ensure sufficient strength and wear resistance. The sleeve 341 has a cylindrical structure and can slide on the outer wall of the cylinder 31. The sleeve 341 can be a single unit or a segmented sleeve structure, with multiple segments sequentially connected to adapt to different working conditions. The connecting lug 342 is fixed to the outer wall of the sleeve 341 by welding. The connecting lug 342 is a plate-like structure with holes, facilitating connection with the anchor point. The connection between the sleeve 341 and the connecting lug 342 allows the sleeve 341 to be stably connected to the external anchor point during sliding, thus supporting the cylinder 31. When the piston rod 32 extends, the sleeve 341 can slide along the outer wall of the cylinder 31 to a suitable position according to the actual situation, and then connect to the anchor point through the connecting lug 342, thereby distributing the force on the cylinder 31 and the piston rod 32.

[0022] In addition, the outer wall of the cylinder 31 is provided with several protruding ribs 311, which are spaced apart along the circumferential direction. The cross-section of the protruding ribs 311 can be rectangular or trapezoidal. The inner wall of the sleeve 341 is provided with several sliding grooves 3410, the number of which is the same as the number of protruding ribs 311. The protruding ribs 311 are inserted into the sliding grooves 3410 respectively and in a one-to-one correspondence. In this way, the sleeve 341 can only slide along the direction of the protruding ribs 311 on the outer wall of the cylinder 31, ensuring the stability and directionality of the sliding. This prevents the sleeve 341 from rotating or deviating arbitrarily on the outer wall of the cylinder 31, thus failing to accurately provide support. The protruding ribs 311 are also provided with several limiting holes 3111, which are spaced apart along the length of the protruding ribs 311. Limiting pins 3112 can be inserted into the limiting holes 3111. The limiting pin 3112 is used to limit the sleeve 341, preventing it from sliding excessively during sliding or moving when sliding is not needed. Once the sleeve 341 has slid to the appropriate position, the limiting pin 3112 is inserted into the corresponding limiting hole 3111 to fix the position of the sleeve 341. Furthermore, the distance between two adjacent limiting holes 3111 is greater than or equal to the length of the sleeve 341, and a limiting pin 3112 is provided at both the top and bottom of the sleeve 341. This design ensures that the sleeve 341 can be stably limited in different positions.

[0023] A retaining ring 312 is provided on the upper part of the outer wall of the cylinder 31. One end of several protruding ribs 311 is fitted with the bottom of the retaining ring 312, and the other end of several protruding ribs 311 is fitted with the top of the flange 33. The protruding ribs 311 and the retaining ring 312 are connected by bolts 3120. The retaining ring 312 can enhance the stability of the protruding ribs 311 and prevent the sleeve 341 from sliding out to the outside of the protruding ribs 311. There are no fewer than three protruding ribs 311, and several protruding ribs 311 and several sliding grooves 3410 are equally spaced. This equally spaced arrangement can make the sleeve 341 bear force evenly during sliding, avoiding excessive local force.

[0024] The implementation principle of this embodiment is as follows: The electro-hydraulic actuator of this embodiment, by setting a movable support mechanism 34 on the outer wall of the cylinder 31, effectively distributes the force on the piston rod 32 and cylinder 31 when the piston rod 32 is extended and radially loaded, utilizing the sliding of the sleeve 341 and its connection with the anchor point. This makes the entire support structure more stable and reliable. Compared to traditional electro-hydraulic actuators, this significantly reduces the possibility of bending deformation of the cylinder 31 and piston rod 32, extends the service life of the electro-hydraulic actuator, reduces equipment maintenance costs and replacement frequency, and improves the economic benefits for enterprises.

[0025] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. An electro-hydraulic actuator, comprising a base (1), wherein the base (1) is provided with a motor part (2) and a actuator part (3), the actuator part (3) comprising a cylinder (31) and a piston rod (32), the cylinder (31) being connected to the base (1) via a flange (33), characterized in that, The cylinder (31) is provided with a movable support mechanism (34) on its outer wall, and the movable support mechanism (34) is used to support the cylinder (31); The movable support mechanism (34) includes a sleeve (341) which can slide on the outer wall of the cylinder (31). The sleeve (341) is provided with a connecting lug (342) for connecting the anchor point.

2. The electro-hydraulic actuator according to claim 1, characterized in that, The outer wall of the cylinder (31) is provided with a plurality of protruding ridges (311), which are spaced apart along the circumferential direction. The inner wall of the sleeve (341) is provided with a plurality of sliding grooves (3410), the number of sliding grooves (3410) being the same as the number of protruding ridges (311), and the plurality of protruding ridges (311) being inserted into the plurality of sliding grooves (3410) respectively and in a one-to-one correspondence. The protruding ridge (311) is also provided with a plurality of limiting holes (3111), and the plurality of limiting holes (3111) are spaced apart along the length direction of the protruding ridge (311). A limiting pin (3112) can be inserted into the limiting hole (3111), and the limiting pin (3112) is used to limit the sleeve (341).

3. The electro-hydraulic actuator according to claim 2, characterized in that, The distance between two adjacent limiting holes (3111) is greater than or equal to the length of the sleeve (341), and a limiting pin (3112) is provided at the top and bottom of the sleeve (341).

4. The electro-hydraulic actuator according to claim 2, characterized in that, The upper part of the outer wall of the cylinder (31) is provided with a fixing ring (312), one end of each of the protruding ribs (311) is attached to the bottom of the fixing ring (312), and the other end of each of the protruding ribs (311) is attached to the top of the flange (33). The protruding ribs (311) and the fixing ring (312) are connected by bolts (3120).

5. The electro-hydraulic actuator according to claim 4, characterized in that, The number of protruding ridges (311) is not less than three, and the protruding ridges (311) and the sliding grooves (3410) are all equally spaced.

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