Electro-hydraulic integrated straight stroke actuating mechanism

Abstract

The invention belongs to the technical field of actuators, and discloses an electro-hydraulic integrated straight stroke actuating mechanism which comprises a hydraulic cylinder assembly and an oil way control assembly arranged on one side of the hydraulic cylinder assembly, and a clamping assembly used for being connected with a valve pipeline is arranged on the output side of the hydraulic cylinder assembly. The outer side of an output shaft of the hydraulic cylinder assembly is sleeved with a sliding plate, two sliding rods symmetrically penetrate through the two sides of the sliding plate in a sliding mode, baffles are fixedly installed at the tops of the two sliding rods correspondingly, and first springs are fixedly connected between the two baffles and the sliding plate correspondingly; the clamping assembly comprises a mounting frame and two clamping arms symmetrically and rotationally connected to the two sides of the mounting frame, and connecting rods are rotationally connected between the two clamping arms and the two sliding rods correspondingly. The clamping arms are arranged, the output end of the hydraulic cylinder assembly drives the sliding plate to move downwards, the sliding rod and the connecting rod push the clamping arms to rotate and clamp the valve pipeline, and the efficiency of the connecting process is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of actuators, and in particular relates to an electro-hydraulic integrated linear actuator. Background Art

[0002] The existing hydraulic actuators all use standard cylinders and are equipped with external hydraulic oil stations for use. However, since the hydraulic oil station takes up a large space and multiple oil pipes and cables need to be connected between the oil station and the cylinder during use, it is more troublesome to use. Therefore, an electro-hydraulic integrated actuator that integrates the hydraulic oil station and the cylinder is proposed. The actuator drives the oil pump through an integrated motor to allow the hydraulic oil in the oil tank to enter the cylinder through the valve module to promote the movement of the piston rod. It has a compact structure and is more convenient to use. Existing actuators are often used to control the opening and closing of valves, but the connection between the actuator and the valve pipeline is often fixed by flanges and multiple sets of bolts. The installation and connection process is time-consuming and labor-intensive. In addition, during use, the hydraulic oil has a high pressure and rubs against the pipeline and the inner wall of the cylinder, which causes the hydraulic oil temperature to gradually rise. The existing return oil pipeline is short and cannot effectively dissipate heat. The high temperature will cause the seals in the hydraulic cylinder system to age and deform, thereby causing hydraulic oil leakage, affecting work efficiency and performance. Summary of the Invention

[0003] The object of the present invention is to provide an electro-hydraulic integrated linear actuator to solve the problems of the existing electro-hydraulic integrated linear actuator being complicated to connect to the valve pipeline and unable to dissipate heat in time.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The cam is connected to the hydraulic cylinder to form a circle around the bottom of the cam, and the cam is connected to the hydraulic cylinder to form a circle around the bottom of the cam.

[0006] Preferably, a displacement sensor is fixedly mounted on the slide.

[0007] Preferably, the slide plate is slidably arranged on the outside of the output shaft of the hydraulic cylinder assembly, and the bottom of the slide plate is rotatably connected to two arc-shaped fixed plates, and the two fixed plates are located on the outside of the output shaft of the hydraulic cylinder assembly. A U-shaped groove is opened at one end of the two fixed plates, and a screw is rotatably connected in the U-shaped groove of one of the fixed plates, and a fastening nut is screwed on the outside of the screw.

[0008] Preferably, the hydraulic cylinder assembly includes a cylinder body and an upper end cover and a lower end cover respectively connected to the two ends of the cylinder body, a piston is slidably connected in the cylinder body, a piston rod is fixedly mounted on the piston, and the bottom of the piston rod slides through the lower end cover, and the mounting frame is fixedly connected to the lower end cover.

[0009] Preferably, the cylinder body and the upper end cover and the lower end cover form a closed space, the piston divides the closed space into a first oil chamber and a second oil chamber, the upper end cover and the lower end cover are respectively provided with a first oil circuit and a second oil circuit, and the first oil chamber and the second oil chamber are respectively connected to the first oil circuit and the second oil circuit.

[0010] Preferably, the oil circuit control component includes a motor, an oil pump, an oil tank and an electromagnetic reversing valve. The output end of the motor is connected to the oil pump, the oil inlet of the oil pump is connected to the oil tank, and the oil outlet of the oil pump is connected to the hydraulic cylinder assembly through the electromagnetic reversing valve. A return oil pipe is also connected between the electromagnetic reversing valve and the oil tank.

[0011] Preferably, the oil return pipe is a spiral structure, and the oil return pipe is sleeved on the outside of the oil tank.

[0012] Preferably, oil pipelines are connected between the first oil circuit, the second oil circuit and the electromagnetic reversing valve.

[0013] Preferably, both the upper end cover and the lower end cover are provided with L-shaped buckles, and both ends of the cylinder body are provided with slots that slide with the buckles.

[0014] Preferably, multiple guide grooves are provided at both ends of the cylinder body, guide rods are slidably connected in the multiple guide grooves, top plates are fixedly connected to the ends of the multiple guide rods, second springs are fixedly connected between the multiple top plates and the guide grooves, and the second springs are sleeved on the outside of the guide rods.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention is provided with a clamping arm, which drives the slide plate to move downward through the output end of the hydraulic cylinder assembly, so that the first spring and the baffle drive the slide bar to move downward, so that the connecting rod pushes the clamping arm to rotate, and then the two clamping arms clamp the valve pipe, so that the operation of connecting the hydraulic cylinder assembly and the valve pipe is simple and the installation efficiency is high. When the hydraulic cylinder assembly continues to extend from the output end, the output shaft drives the slide plate to stretch the first spring, and the clamping arm is always in a clamping state. The setting of the clamping arm does not affect the extension and contraction control valve of the hydraulic cylinder assembly.

[0017] (2) The present invention is provided with a fixing plate, a screw and a fastening nut. By rotating the fastening nut on the screw, the two fixing plates can be clamped or loosened to make the slide plate and the piston rod relatively fixed or movable. In this way, the distance between the end of the piston rod and the slide plate can be flexibly adjusted to increase the control stroke of the piston rod. For example, when clamping a thinner valve pipe, the stroke for the clamping arm to clamp the valve pipe is longer, so that the piston rod part has entered the valve pipe during clamping, resulting in a smaller valve adjustment range. At this time, the distance between the end of the piston rod and the slide plate can be shortened, so that the end of the piston rod just enters the valve pipe during clamping by the clamping arm. In this way, the actuator can be used for valve pipes of different diameters and the control stroke is longer.

[0018] (3) The present invention is provided with a clip and a top plate. The connection between the upper end cover and the lower end cover and the cylinder body is achieved through the rotation of the clip and the slot. During installation, it is only necessary to insert the clip into the slot and rotate the upper end cover or the lower end cover so that one end of the L-shaped clip slides into the slot. At this time, the top plate is pushed by the elastic force of the second spring so that the top plate is pressed against the upper end cover or the lower end cover, thereby increasing the friction between the clip and the slot and preventing the upper end cover or the lower end cover from rotating during use. In this way, the connection between the upper end cover and the lower end cover and the cylinder body is simpler to operate and has higher installation efficiency than the bolt connection, which is convenient for the maintenance and replacement of the piston.

[0019] (4) The present invention is provided with an oil return pipe, which is provided with a spiral structure. The flow length of the hydraulic oil is increased during the process of the hydraulic oil returning to the oil tank, so that the hydraulic oil can fully exchange heat with the air through the return pipe, thereby rapidly cooling the hydraulic oil and ensuring the use of the hydraulic cylinder assembly. Figure 8 As shown, when both ends of the hydraulic cylinder assembly are closed, the oil pump can allow the hydraulic oil in the oil tank to enter the return oil pipe through the electromagnetic reversing valve for circulation and heat dissipation, so that the hydraulic oil is kept within the operating temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a first stereogram of the present invention;

[0021] Figure 2 is a second stereoscopic view of the present invention;

[0022] Figure 3 is a cross-sectional view of the present invention;

[0023] Figure 4 A perspective view of the mounting bracket of the present invention;

[0024] Figure 5 It is a cross-sectional view of the mounting bracket assembly of the present invention;

[0025] Figure 6 It is a cross-sectional view of the cylinder assembly of the present invention;

[0026] Figure 7It is an enlarged view of point A of the present invention;

[0027] Figure 8 This is the oil circuit principle diagram of the present invention;

[0028] In the figure: 1-lower end cover, 2-cylinder body, 3-upper end cover, 4-oil delivery pipe, 5-motor, 6-oil pump, 7-electromagnetic reversing valve, 8-oil return pipe, 9-oil tank, 10-slide plate, 11-slide rod, 12-connecting rod, 13-clamping arm, 14-fixing plate, 15-piston rod, 16-mounting frame, 17-fastening nut, 18-screw, 19-piston, 20-first oil circuit, 21-second oil circuit, 22-first spring, 23-baffle, 24-displacement sensor, 25-slot, 26-clip, 27-top plate, 28-second spring, 29-guide rod, 30-guide groove. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1-8 As shown, the present invention provides the following technical solutions:

[0031] A kind of electro-hydraulic integrated linear actuator includes a hydraulic cylinder assembly and an oil circuit control assembly arranged on one side of the hydraulic cylinder assembly. The output side of the hydraulic cylinder assembly is provided with a clamping assembly for connecting the valve pipeline. The outer side of the output shaft of the hydraulic cylinder assembly is provided with a slide plate 10. Two slide bars 11 are symmetrically slidable on both sides of the slide plate 10. Baffles 23 are fixedly installed on the top of the two slide bars 11, and a first spring 22 is fixedly connected between the two baffles 23 and the slide plate 10. The clamping assembly includes a mounting frame 16 and two clamping arms 13 symmetrically connected to the two sides of the mounting frame 16, and connecting rods 12 are respectively rotatably connected between the two clamping arms 13 and the two slide bars 11.

[0032] Based on the above disclosed structure, when connecting the hydraulic cylinder assembly to the valve pipeline:

[0033] First, the two clamping arms 13 are sleeved on the outside of the valve pipe, and the output shaft of the hydraulic cylinder assembly is aligned with the valve. The oil circuit control assembly is started to extend the output end of the hydraulic cylinder assembly, so that the output end of the hydraulic cylinder assembly drives the slide plate 10 to move downward, thereby causing the two first springs 22 to respectively drive the two baffles 23 to move downward, causing the two slide bars 11 to move downward with the slide plate 10, and then causing the two connecting rods 12 to respectively push the two clamping arms 13 to rotate on both sides of the mounting frame 16, so that the clamping ends of the two clamping arms 13 approach and press against the valve pipe, thereby fixing the hydraulic cylinder assembly and the valve pipe relatively;

[0034] At this time, the hydraulic cylinder assembly needs to continue to extend the output end to control the opening and closing of the valve, and continue to control the oil circuit control assembly to extend the hydraulic cylinder assembly to the output end, so that the output end of the hydraulic cylinder assembly drives the slide plate 10 to move downward. At the same time, because the clamping arm 13 has been pressed against both sides of the valve pipe, the connecting rod 12 and the slide rod 11 cannot move, and the baffle 23 cannot move. In this way, the slide plate 10 moves downward and stretches the two first springs 22, so that the setting of the clamping arm 13 does not affect the extension and contraction of the hydraulic cylinder assembly to control the valve, and when the hydraulic cylinder assembly extends the output end to control the opening and closing of the valve, due to the elastic force of the first spring 22, the clamping arm 23 is always pressed against the valve pipe, so that the hydraulic cylinder assembly and the valve pipe are reliably connected.

[0035] Preferably, a displacement sensor 24 is fixedly mounted on the slide 10. Based on this, the displacement sensor 24 on the slide 10 can measure the extension length of the hydraulic cylinder assembly when the clamping arm 13 clamps the valve pipe, and transmit the data to the control end. This can be used to set a limit on the travel range of the hydraulic cylinder assembly to adjust the valve, preventing the clamping arm 13 from loosening its grip on the valve pipe during use, which would affect the use of the actuator.

[0036] In addition, regarding the connection between the skateboard 10 and the output shaft of the hydraulic cylinder assembly, the skateboard 10 is slidably arranged on the outside of the output shaft of the hydraulic cylinder assembly, and two arc-shaped structure fixed plates 14 are rotatably connected to the bottom of the skateboard 10, and the two fixed plates 14 are located on the outside of the output shaft of the hydraulic cylinder assembly. A U-shaped groove is opened at one end of the two fixed plates 14, and a screw 18 is rotatably connected in the U-shaped groove of one of the fixed plates 14, and a fastening nut 17 is screwed and connected to the outside of the screw 18. Based on this, when fixing the slide plate 10 to the output shaft of the hydraulic cylinder assembly, the two fixing plates 14 are rotated respectively so that the two fixing plates 14 are pressed against both sides of the output shaft of the hydraulic cylinder assembly, and then the screw 18 is rotated in the U-shaped groove on one of the fixing plates 14 so that the other end of the screw 18 slides into the U-shaped groove of the other fixing plate 14, and then the fastening nut 17 is rotated so that the fastening nut 17 moves along the screw 18 close to the fixing plate 14, and the two fixing plates 14 clamp the output shaft of the hydraulic cylinder assembly, thereby achieving the fixation between the slide plate 10 and the output shaft of the hydraulic cylinder assembly; conversely, the fastening nut 17 is rotated away from the fixing plate 14 so that the slide plate 10 can be relatively fixed to the hydraulic cylinder assembly. The output shaft of the component slides relatively, thereby adjusting the distance between the end of the output shaft of the hydraulic cylinder component and the slide 10 to increase the effective control stroke of the output shaft of the hydraulic cylinder component. For example, when clamping a thinner valve pipe, the stroke used to make the clamping arm 13 clamp the valve pipe is longer, so that the output shaft part of the hydraulic cylinder component has entered the valve pipe when fixedly clamped, resulting in a smaller valve adjustment range. At this time, the distance between the end of the output shaft of the hydraulic cylinder component and the slide 10 can be shortened, so that the end of the output shaft of the hydraulic cylinder component just enters the valve pipe when the clamping arm 13 is fixedly clamped. In this way, the actuator can be used for valve pipes of different diameters, and the control stroke is longer.

[0037] As mentioned above, the hydraulic cylinder assembly is preferably configured as follows:

[0038] The hydraulic cylinder assembly includes a cylinder body 2 and an upper end cover 3 and a lower end cover 1 respectively connected to the two ends of the cylinder body 2. A piston 19 is slidably connected in the cylinder body 2. A piston rod 15 is fixedly mounted on the piston 19. The bottom of the piston rod 15 slides through the lower end cover 1. The mounting bracket 16 is fixedly connected to the lower end cover 1.

[0039] The cylinder body 2, the upper end cover 3 and the lower end cover 1 form a closed space, and the piston 19 divides the closed space into a first oil chamber and a second oil chamber. The upper end cover 3 and the lower end cover 1 are respectively provided with a first oil passage 20 and a second oil passage 21, and the first oil chamber and the second oil chamber are respectively connected to the first oil passage 20 and the second oil passage 21.

[0040] As can be seen from the above, the output shaft of the hydraulic cylinder assembly is the piston rod 15. When the hydraulic cylinder assembly extends out of the output end, hydraulic oil is introduced into the first oil chamber through the first oil circuit 20, and at the same time, the hydraulic oil in the second oil chamber is discharged from the second oil circuit 21. Due to the increase in the volume of the hydraulic oil in the first oil chamber, the hydraulic oil pushes the piston 19 to move downward, thereby driving the piston rod 15 to move downward, thereby causing the hydraulic cylinder assembly to extend the output shaft; conversely, hydraulic oil is introduced into the second oil chamber through the second oil circuit 21, and at the same time, the hydraulic oil in the first oil chamber is discharged from the first oil circuit 20, so that the hydraulic oil in the second oil chamber pushes the piston 19 upward, causing the piston rod 15 to move upward, thereby causing the hydraulic cylinder assembly to retract the output shaft.

[0041] In addition, the oil circuit control component is preferably configured as follows:

[0042] The oil circuit control component includes a motor 5, an oil pump 6, an oil tank 9 and an electromagnetic reversing valve 7. The output end of the motor 5 is connected to the oil pump 6, the oil inlet of the oil pump 6 is connected to the oil tank 9, and the oil outlet of the oil pump 6 is connected to the hydraulic cylinder assembly through the electromagnetic reversing valve 7. A return oil pipe 8 is also connected between the electromagnetic reversing valve 7 and the oil tank 9; an oil delivery pipe 4 is connected between the first oil circuit 20 and the second oil circuit 21 and the electromagnetic reversing valve 7.

[0043] As can be seen from the above, when the hydraulic oil is introduced into the hydraulic cylinder assembly, the starter motor 5 drives the oil pump 6 to work, so that the hydraulic oil in the oil tank 9 enters the electromagnetic reversing valve 7, as shown in FIG. Figure 8 As shown, the electromagnetic reversing valve 7 is a three-position four-way reversing valve. When the right side of the electromagnetic reversing valve 7 is energized to make it in the right position, the hydraulic oil output by the oil pump 6 enters the second oil chamber through the oil pipe 4 connected to the second oil circuit 21, and the hydraulic oil in the first oil chamber flows back to the oil tank 9 in sequence through the oil pipe 4 connected to the first oil circuit 20, the electromagnetic reversing valve 7 and the return pipe 8, so that the piston 19 drives the piston rod 15 to retract into the cylinder body 2; when the left side of the electromagnetic reversing valve 7 is energized to make it in the left position, the hydraulic oil output by the oil pump 6 enters the first oil chamber through the oil pipe 4 connected to the first oil circuit 20, and the hydraulic oil in the second oil chamber flows back to the oil tank 9 in sequence through the oil pipe 4 connected to the second oil circuit 21, the electromagnetic reversing valve 7 and the return pipe 8, so that the piston 19 drives the piston rod 15 to extend out of the cylinder body 2; when the electromagnetic reversing valve 7 is de-energized to make it in the middle position, the first oil chamber and the second oil chamber are both in a closed state, and at this time the piston 19 and the piston rod 15 do not move.

[0044] Preferably, the oil return pipe 8 is a spiral structure, and the oil return pipe 8 is sleeved on the outside of the oil tank 9. Based on this, the hydraulic oil gradually increases in temperature due to pressure and friction with the cylinder body 2. When the hydraulic oil flows through the oil return pipe 8, the hydraulic oil in the oil return pipe 8 can exchange heat with the external air through the oil return pipe 8. The oil return pipe 8 is set in a spiral structure, which can increase the length of the oil return pipe 8, thereby increasing the heat exchange efficiency and quickly reducing the temperature of the hydraulic oil. In addition, if Figure 8As shown, when the electromagnetic reversing valve 7 is de-energized and in the middle position, the first oil chamber and the second oil chamber are both in a closed state, and the output end of the oil pump 6 is connected to the oil return pipe 8, so that the hydraulic oil in the oil tank 9 circulates and dissipates heat through the oil pump 6 and the oil return pipe 8, so that the hydraulic oil in the oil tank 9 is kept within the operating temperature.

[0045] Furthermore, regarding the connection between the upper end cover 3 and the lower end cover 1 and the cylinder body 2, it is preferred to have the following structure:

[0046] The upper end cover 3 and the lower end cover 1 are both provided with L-shaped buckles 26, and both ends of the cylinder body 2 are respectively provided with slots 25 that slide with the buckles 26;

[0047] A plurality of guide grooves 30 are provided at both ends of the cylinder body 2, and a guide rod 29 is slidably connected in the plurality of guide grooves 30, and the ends of the plurality of guide rods 29 are fixedly connected to a top plate 27, and a second spring 28 is fixedly connected between the plurality of top plates 27 and the guide grooves 30, and the second spring 28 is sleeved on the outside of the guide rod 29.

[0048] When the upper cover 3 and the lower cover 1 are connected to the cylinder body 2, the buckles 26 on the upper cover 3 and the lower cover 1 are first inserted into the clamping grooves 25 at both ends of the cylinder body 2, and then the upper cover 3 or the lower cover 1 is rotated so that one end of the buckle 26 of the L-shaped structure slides into the clamping groove 25. When the upper cover 3 and the lower cover 1 are close to the cylinder body 2, the top plate compresses the second spring 28 and the guide rod 29 slides in the guide groove 30. After the buckle 26 is rotated and fitted in the clamping groove 25, the elastic force of the second spring 28 makes the top 27 press against the upper cover 3 or the lower cover 1, thereby increasing the friction force between one end of the L-shaped buckle 26 and the clamping groove 25, preventing the upper cover 3 or the lower cover 1 from rotating relative to the cylinder body 2 during use, thereby achieving the fixed connection between the upper cover 3 and the lower cover 1 and the cylinder body 2, simple operation and high installation efficiency, and convenient for maintenance and replacement of the internal parts of the cylinder body 2.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An electro-hydraulic integrated linear actuator, characterized in that: The invention comprises a hydraulic cylinder assembly and an oil circuit control assembly arranged on one side of the hydraulic cylinder assembly, wherein a clamping assembly for connecting a valve pipeline is arranged on the output side of the hydraulic cylinder assembly, a slide plate (10) is sleeved on the outer side of the output shaft of the hydraulic cylinder assembly, two slide bars (11) are symmetrically slidably penetrated on both sides of the slide plate (10), baffle plates (23) are fixedly installed on the tops of the two slide bars (11), and a first spring (22) is fixedly connected between the two baffle plates (23) and the slide plate (10), and the clamping assembly comprises a mounting frame (16) and two clamping arms (13) symmetrically rotatably connected to both sides of the mounting frame (16), and connecting rods (12) are rotatably connected between the two clamping arms (13) and the two slide bars (11).

2. The electro-hydraulic integrated linear actuator according to claim 1, characterized in that: A displacement sensor (24) is fixedly mounted on the slide plate (10).

3. The electro-hydraulic integrated linear actuator according to claim 1, characterized in that: The slide plate (10) is slidably arranged on the outside of the output shaft of the hydraulic cylinder assembly. The bottom of the slide plate (10) is rotatably connected to two arc-shaped fixed plates (14), and the two fixed plates (14) are located on the outside of the output shaft of the hydraulic cylinder assembly. One end of the two fixed plates (14) is provided with a U-shaped groove, and a screw rod (18) is rotatably connected in the U-shaped groove of one of the fixed plates (14), and a fastening nut (17) is screwed and connected to the outside of the screw rod (18).

4. The electro-hydraulic integrated linear actuator according to claim 1, characterized in that: The hydraulic cylinder assembly comprises a cylinder body (2) and an upper end cover (3) and a lower end cover (1) respectively connected to both ends of the cylinder body (2); a piston (19) is slidably connected inside the cylinder body (2); a piston rod (15) is fixedly mounted on the piston (19), and the bottom of the piston rod (15) slides through the lower end cover (1); and the mounting frame (16) is fixedly connected to the lower end cover (1).

5. The electro-hydraulic integrated linear actuator according to claim 4, characterized in that: The cylinder body (2) and the upper end cover (3) and the lower end cover (1) enclose a closed space, and the piston (19) divides the closed space into a first oil chamber and a second oil chamber. The upper end cover (3) and the lower end cover (1) are respectively provided with a first oil passage (20) and a second oil passage (21), and the first oil chamber and the second oil chamber are respectively connected to the first oil passage (20) and the second oil passage (21).

6. The electro-hydraulic integrated linear actuator according to claim 5, characterized in that: The oil circuit control component comprises a motor (5), an oil pump (6), an oil tank (9) and an electromagnetic reversing valve (7); the output end of the motor (5) is connected to the oil pump (6); the oil inlet of the oil pump (6) is connected to the oil tank (9); the oil outlet of the oil pump (6) is connected to the hydraulic cylinder component through the electromagnetic reversing valve (7); and an oil return pipe (8) is also connected between the electromagnetic reversing valve (7) and the oil tank (9).

7. The electro-hydraulic integrated linear actuator according to claim 6, characterized in that: The oil return pipe (8) is a spiral structure, and the oil return pipe (8) is sleeved on the outside of the oil tank (9).

8. The electro-hydraulic integrated linear actuator according to claim 6, characterized in that: An oil delivery pipe (4) is connected between the first oil circuit (20) and the second oil circuit (21) and the electromagnetic reversing valve (7).

9. The electro-hydraulic integrated linear actuator according to claim 4, characterized in that: The upper end cover (3) and the lower end cover (1) are both provided with a buckle (26) of an L-shaped structure, and both ends of the cylinder body (2) are respectively provided with a clamping groove (25) that is slidably matched with the buckle (26).

10. The electro-hydraulic integrated linear actuator according to claim 9, characterized in that: A plurality of guide grooves (30) are provided at both ends of the cylinder body (2), a plurality of guide grooves (30) are slidably connected with guide rods (29), a plurality of ends of the guide rods (29) are fixedly connected with top plates (27), a second spring (28) is fixedly connected between the top plates (27) and the guide grooves (30), and the second spring (28) is sleeved on the outside of the guide rods (29).

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