Hydraulic execution oil cylinder and working method thereof

Abstract

The invention discloses a hydraulic execution oil cylinder which comprises a hydraulic cylinder and attached parts on the hydraulic cylinder. The hydraulic cylinder comprises a cylinder body, a piston and a piston rod. The piston divides the interior of the cylinder body into a first cavity and a second cavity. A first opening and a second opening are formed in the cylinder body; the attached part comprises a pipeline structure and a sliding assembly, and the pipeline structure comprises a first pipe, a second pipe, a third pipe and a fourth pipe which are communicated with one another through a plurality of transverse pipelines; the first pipe and the second pipe are respectively connected with the first cavity and the second cavity through the first opening and the second opening; the sliding assembly slides to adjust the connection state of the second pipe and the second cavity. A complex converging device (such as a converging valve) in a traditional hydraulic execution oil cylinder is simplified into an attachment structure, and two oil ways are communicated through the attachment structure to supply oil, so that the feeding force is increased when an execution end works, and the hydraulic execution oil cylinder adapts to the heavy-load working condition; a switching device is arranged in the attachment structure, the sliding plate is fixed or detached through a rod, and switching between a conventional working mode and a large-load mode is rapidly achieved. The L-shaped sliding piece is matched with the sliding block, so that the function of communicating with the two piston cavities on the basis of a single oil way is achieved; through the linkage oil supply design of the double cavities, the hydraulic cylinder can provide stronger power output in a large-load mode.

Description

Technical Field

[0001] The invention belongs to the technical field of ground trench digging construction equipment, and specifically relates to a hydraulic execution oil cylinder and a working method thereof. Background Art

[0002] As a key hydraulic actuator, hydraulic cylinders are widely used in various types of engineering machinery, especially in construction environments with complex geological conditions. Their performance directly affects the working efficiency and reliability of the equipment. However, existing hydraulic cylinders still face many technical challenges in practical applications, which restricts construction efficiency and applicability.

[0003] Combined with the technical characteristics of existing hydraulic actuators, the following problems exist in actual engineering applications:

[0004] 1. Complex confluence device structure: The hydraulic actuator cylinder in current technology usually needs to be equipped with a dual-pump working mode, and the oil circuit is merged through a confluence device (such as a confluence valve) to adapt to high-load conditions. However, this confluence device has a complex structure, occupies a large space, is difficult to install, has poor fixation, and leads to a significant increase in manufacturing and maintenance costs.

[0005] 2. Single working mode: Traditional hydraulic cylinders usually have independent chambers on both sides of the piston. Each chamber can only realize oil intake or pressure relief respectively. There is a lack of technical solutions for rapid switching between independent working mode and collaborative working mode, which makes it difficult to meet the needs of different construction scenarios.

[0006] 3. Limitations of oil circuit design: The hydraulic cylinders of the prior art usually can only support the oil circuit connection of a single chamber, and it is difficult to achieve the linkage oil supply of the two chambers, resulting in low oil circuit utilization and affecting work efficiency.

[0007] 4. Sliding parts wear problem: During operation, the sliding parts in the current hydraulic actuator cylinder often have their service life significantly reduced due to stroke collision problems.

[0008] 5. Difficulty in arranging mechanisms in a small space: In the limited installation space of construction machinery, the complex mechanism arrangement of the existing technology often leads to interference problems, making it difficult to effectively meet the requirements of miniaturization and integration of construction equipment. Summary of the invention

[0009] The main purpose of the present invention is to provide a hydraulic actuator cylinder having single-pump and double-pump working modes respectively and being easily switchable, and a working method thereof.

[0010] The hydraulic actuator cylinder provided by the present invention comprises a hydraulic cylinder and attached parts thereon; the hydraulic cylinder comprises a cylinder body, a piston, and a piston rod, wherein the piston divides the interior of the cylinder body into a first cavity and a second cavity; the cylinder body is provided with a first port and a second port; the attached parts comprise a pipeline structure and a sliding assembly, wherein the pipeline structure comprises a first pipe, a second pipe, a third pipe and a fourth pipe, which are interconnected through a plurality of transverse pipes; the first pipe and the second pipe are connected to the first cavity and the second cavity respectively through a first port and a second port; the sliding assembly adjusts the connection state of the second pipe and the second cavity by sliding.

[0011] In one embodiment of the above-mentioned oil cylinder, the pipeline structure includes a first tube, a first transverse tube, a second tube, a second transverse tube, a third tube, a third transverse tube and a fourth tube; the first transverse tube connects the first tube and the second tube; the top end of the third tube is closed, and the bottom end of the third tube is connected to the fourth tube; the second transverse tube and the third transverse tube both connect the second tube and the third tube, wherein the third transverse tube is located above the second transverse tube.

[0012] In one embodiment of the above oil cylinder, the fourth pipe extends along the cylinder body and is connected to a third port provided on the cylinder body.

[0013] In one embodiment of the above oil cylinder, the sliding assembly is arranged in the second transverse tube, and the sliding assembly includes a sliding member, a suspension bracket, a sliding block, a spring and a limit member.

[0014] In one embodiment of the above-mentioned oil cylinder, the sliding member includes a vertical plate and a transverse extension plate, the vertical plate is provided with a vertical hole which can be aligned with the through hole on the first transverse tube; the limiting member is provided on the side of the through hole away from the sliding member.

[0015] In one embodiment of the above oil cylinder, the suspension bracket is installed on the inner wall of the second transverse tube, the end of the transverse extension plate is connected to the slider, and the slider is connected to the suspension bracket through the spring.

[0016] In one embodiment of the above oil cylinder, the sealing device includes a sealing cover and a threaded tube; a threaded tube is arranged around the through hole of the first transverse tube, and the sealing cover is connected to the threaded tube.

[0017] In one embodiment of the oil cylinder, an inner top wall of the sealing cover is provided with a receiving portion.

[0018] A method for using the above-mentioned hydraulic actuator cylinder to work, the steps are as follows:

[0019] 1. Remove the sealing cover, take out the rod, and then tighten the sealing cover; after removing the rod, the rod will no longer lock the sliding part and enter the high-load working mode;

[0020] 2. First, the pressure is released through the fourth pipe, the third pipe, the third transverse pipe and the second pipe, and the oil in the second chamber is released from the third port through the second pipe;

[0021] 3. The first tube supplies oil to the first chamber, and the oil pushes the piston and the sliding member to move. The sliding member pushes the slider to block the third tube, and the piston starts to move;

[0022] 4. When the transverse extension plate no longer blocks the second port, oil is also supplied to the first chamber through the second pipe. The double-chamber oil supply enables the piston to operate at full power;

[0023] 5. When the piston returns to the bottom, the oil in the first chamber is discharged through the first pipe and the second pipe;

[0024] 6. The spring pulls the slider back to its original position, the third tube is unblocked, and the slider drives the sliding part to return to its initial position;

[0025] 7. Oil is supplied to the second chamber through the second pipe, the third transverse pipe, the third pipe, and the fourth pipe in sequence, thereby retracting the piston.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. The complex confluence device (such as the confluence valve) in the traditional hydraulic actuator cylinder is simplified into an attachment structure, and the two oil circuits are connected through the attachment structure to supply oil, thereby increasing the feed force when the actuator is working and adapting to large load conditions;

[0028] 2. A switching device is provided in the above attachment structure, which can quickly switch between the normal working mode and the heavy load mode by fixing or removing the slide plate with a rod;

[0029] 3. The L-shaped sliding part and the slider are used to achieve the function of connecting with two piston chambers on the basis of a single oil circuit; through the linkage oil supply design of the double chambers, the hydraulic cylinder can provide more powerful power output under the large load mode;

[0030] 4. The sliding parts and the sliders always maintain contact, avoiding the problem of component wear caused by travel collision during operation; the slider return is controlled by a spring, the action is smooth and reliable, further reducing mechanical wear, extending the service life of the equipment and reducing maintenance costs;

[0031] 5. The sliding part is improved and consists of a vertical slide plate and a laterally extending slide plate, which are matched with a spring and a suspension bracket for fixing the spring. The laterally extending slide plate is located at the bottom and is staggered with the suspension bracket, so that it can pass through the suspension bracket to contact the slider, and can achieve interference-free operation in a limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1It is a schematic diagram of the overall structure of an excavation device according to an embodiment of the present invention.

[0033] Figure 2 for Figure 1 Schematic diagram of the first state working of the hydraulic actuator cylinder.

[0034] Figure 3 for Figure 1 Schematic diagram of the second state working of the hydraulic actuator cylinder.

[0035] Figure 4 for Figure 1 Schematic diagram of the third state working of the hydraulic actuator cylinder.

[0036] Figure 5 for Figure 1 Schematic diagram of the fourth state working of the hydraulic actuator cylinder.

[0037] Figure 6 for Figure 1 Schematic diagram of the fifth state working of the hydraulic actuator cylinder.

[0038] The reference numerals are as follows:

[0039] 1. Base, 2. Rotation module, 3. Actuator arm, 4. Hydraulic actuator cylinder, 5. Operating head, 6. Cylinder body, 7. Piston, 8. Piston rod, 9. First chamber, 10. Second chamber, 11. Limit block, 12. First tube, 13. First transverse tube, 14. Second tube, 15. Second transverse tube, 16. Third tube, 17. Third transverse tube, 18. Fourth tube, 19. First port, 20. Second port, 21. Vertical plate, 22. Transverse extension plate, 23. Suspension bracket, 24. Slider, 25. Spring, 26. Limiter, 27. Vertical hole, 28. Through hole, 29. Sealing cover, 30. Threaded tube. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technical solutions. Obviously, the described embodiments are only part of the embodiments, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figures 1 to 6 As shown, the hydraulic actuator cylinder disclosed in this embodiment is mainly used as a hydraulic drive device for trench digging construction equipment to meet the high-load operation requirements under complex working conditions.

[0042] The hydraulic actuator oil cylinder comprises a hydraulic cylinder and attached components, wherein the attached components are attached to the hydraulic cylinder.

[0043] The hydraulic cylinder comprises a cylinder body 6, a piston 7, a piston rod 8, and a stopper 11. The piston divides the interior of the cylinder body into a first chamber 9 and a second chamber 10. The cylinder body 6 is provided with a first port 19 and a second port 20 for connecting an oil circuit.

[0044] The attached parts include pipeline structure, sliding components and sealing devices.

[0045] The pipeline structure includes a first pipe 12 , a first cross pipe 13 , a second pipe 14 , a second cross pipe 15 , a third pipe 16 , a third cross pipe 17 and a fourth pipe 18 .

[0046] The first pipe 12 is communicated with the first port 19 of the cylinder body 6 for supplying oil to or draining oil from the first chamber 9 .

[0047] The second tube 14 corresponds to the second port 20 and is used to be connected to the second cavity 10 .

[0048] The first cross pipe 13 connects the first pipe 12 and the second pipe 14 .

[0049] The top end of the third tube 16 is closed, and the bottom end of the third tube is connected to the fourth tube 18. The fourth tube extends along the cylinder body and is connected to the third port provided on the cylinder body.

[0050] The second transverse tube 15 and the third transverse tube 17 both connect the second tube 14 and the third tube 16 , wherein the third transverse tube is located above the second transverse tube.

[0051] The sliding assembly is disposed in the second transverse tube 15 , and includes a sliding member, a suspension bracket 23 , a sliding block 24 , a spring 25 and a limiting member 26 .

[0052] The sliding member includes a vertical plate 21 and a transverse extension plate 22, which can slide in the second transverse tube. The vertical plate is provided with a vertical hole 27, which can be aligned with the through hole 28 on the first transverse tube 13. The limiter 26 is provided on the side of the through hole of the first transverse tube away from the sliding member, and is used to limit the position of the sliding member.

[0053] The suspension bracket 23 is installed on the inner wall of the second transverse tube 15 , and the end of the transverse extension plate 22 is connected to the slider 24 . The slider is connected to the suspension bracket through a spring 25 and has an automatic reset function.

[0054] The sealing device comprises a sealing cover 29 and a threaded tube 30 .

[0055] A threaded tube 30 is arranged around the through hole 28 of the first transverse tube 13, and a sealing cover 29 is connected to the threaded tube. An accommodating portion is arranged on the inner top wall of the sealing cover to accommodate and fix the rod.

[0056] like Figure 2 As shown, in normal operating mode the slide can be locked in this position by a lever:

[0057] After aligning the vertical hole 27 with the through hole 28, insert the rod and tighten the sealing cover 29 to make the transverse extension plate 22 block the second port 20; the first tube 12 is connected to the first chamber 9, and the second tube is connected to the third port (not shown, which is the conventional hydraulic port on the other side of the oil cylinder) through the third and fourth tubes and then connected to the second chamber. This is the conventional normal working mode, and the pressure oil can pass through one side and leak on the other side.

[0058] The normal working mode is suitable for medium load conditions, and the working head 5 can complete normal excavation tasks.

[0059] like Figure 3 As shown, when greater power output is required, the sliding member is unlocked and switched to the large-load working mode.

[0060] Unscrew the sealing cover 29, remove the rod, and release the fixation of the sliding member. At this time, the slider 24 drives the transverse extension plate 22 to slide under the action of the spring 25, and the transverse extension plate releases the blockage of the second port 20. The first tube 12 supplies oil to the first chamber 9, and the second tube 14 supplies oil to the second chamber 10, forming a dual-chamber linkage, which significantly improves the power output.

[0061] The heavy load working mode is suitable for high load conditions, such as deep excavation under complex geological conditions.

[0062] A working method of a hydraulic actuator cylinder comprises the following steps:

[0063] 1. Remove the sealing cover, take out the rod, and then tighten the sealing cover; after removing the rod, the rod will no longer lock the sliding part and enter the high-load working mode;

[0064] 2. First, the pressure is released through the fourth pipe, the third pipe, the third transverse pipe and the second pipe, and the oil in the second chamber is released from the third port through the second pipe;

[0065] 3. The first tube supplies oil to the first chamber, and the oil pushes the piston and the sliding member to move. The sliding member pushes the slider to block the third tube, and the piston starts to move;

[0066] 4. When the transverse extension plate no longer blocks the second port, oil is also supplied to the first chamber through the second pipe. The double-chamber oil supply enables the piston to operate at full power;

[0067] 5. When the piston returns to the bottom, the oil in the first chamber is discharged through the first pipe and the second pipe;

[0068] 6. The spring pulls the slider back to its original position, the third tube is unblocked, and the slider drives the sliding part to return to its initial position;

[0069] 7. Oil is supplied to the second chamber through the second pipe, the third transverse pipe, the third pipe, and the fourth pipe in sequence, thereby retracting the piston.

[0070] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic actuator cylinder, characterized in that: It includes a hydraulic cylinder and its attached parts; The hydraulic cylinder comprises a cylinder body, a piston, and a piston rod. The piston divides the interior of the cylinder body into a first chamber and a second chamber. The cylinder body is provided with a first port and a second port. The attached parts include a pipeline structure and a sliding assembly. The pipeline structure includes a first tube, a second tube, a third tube and a fourth tube, which are interconnected through multiple transverse pipes; the first tube and the second tube are connected to the first cavity and the second cavity through a first port and a second port respectively; the sliding assembly adjusts the connection state of the second tube and the second cavity by sliding.

2. The hydraulic actuator cylinder according to claim 1, characterized in that: The pipeline structure includes a first pipe, a first transverse pipe, a second pipe, a second transverse pipe, a third pipe, a third transverse pipe and a fourth pipe; The first transverse tube connects the first tube and the second tube; the top end of the third tube is closed, and the bottom end of the third tube is connected to the fourth tube; the second transverse tube and the third transverse tube both connect the second tube and the third tube, wherein the third transverse tube is located above the second transverse tube.

3. The hydraulic actuator cylinder according to claim 2, characterized in that: The fourth pipe extends along the cylinder body and is connected to a third port provided on the cylinder body.

4. The hydraulic actuator cylinder according to claim 2, characterized in that: The sliding assembly is arranged in the second transverse tube, and the sliding assembly includes a sliding member, a suspension bracket, a sliding block, a spring and a limiting member.

5. The hydraulic actuator cylinder according to claim 4, characterized in that: The sliding member comprises a vertical plate and a transverse extension plate. The vertical plate is provided with a vertical hole which can be aligned with the through hole on the first transverse tube. The limiting member is arranged on a side of the through hole away from the sliding member.

6. The hydraulic actuator cylinder according to claim 5, characterized in that: The suspension bracket is installed on the inner wall of the second transverse tube, the end of the transverse extension plate is connected to the slider, and the slider is connected to the suspension bracket through the spring.

7. The hydraulic actuator cylinder according to claim 5, characterized in that: The sealing device comprises a sealing cover and a threaded tube; a threaded tube is arranged around the through hole of the first transverse tube, and the sealing cover is connected to the threaded tube.

8. The hydraulic actuator cylinder according to claim 7, characterized in that: The inner top wall of the sealing cover is provided with a receiving portion.

9. A method for working using the hydraulic actuator cylinder according to claims 1 to 8, the steps of which are as follows:

1. Remove the sealing cover, take out the rod, and then tighten the sealing cover; after removing the rod, the rod will no longer lock the sliding part and enter the high-load working mode; 2. First, the pressure is released through the fourth pipe, the third pipe, the third transverse pipe and the second pipe, and the oil in the second chamber is released from the third port through the second pipe; 3. The first tube supplies oil to the first chamber, and the oil pushes the piston and the sliding member to move. The sliding member pushes the slider to block the third tube, and the piston starts to move; 4. When the transverse extension plate no longer blocks the second port, oil is also supplied to the first chamber through the second pipe. The double-chamber oil supply enables the piston to operate at full power; 5. When the piston returns to the bottom, the oil in the first chamber is discharged through the first pipe and the second pipe; 6. The spring pulls the slider back to its original position, the third tube is unblocked, and the slider drives the sliding part to return to its initial position; 7. Oil is supplied to the second chamber through the second pipe, the third transverse pipe, the third pipe, and the fourth pipe in sequence, thereby retracting the piston.

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