Hydraulic oil cylinder with good sealing effect

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a hydraulic oil cylinder with a good sealing effect. Comprising a cylinder body and further comprises a piston rod arranged on the inner wall of the cylinder body in a sliding mode, an installation plate is fixed to the top of the cylinder body, a fixing block is fixed to the top of the installation plate, and a bolt is arranged on the inner wall of the fixing block in a rotating mode. A limiting block can be conveniently pushed, a first sealing ring can be conveniently pressed by arranging the limiting block, so that the sealing performance of the device is conveniently improved, a connecting rod can be conveniently installed by arranging a supporting block, and a piston rod can be conveniently limited to prevent the piston rod from colliding with a cylinder body by arranging the connecting rod; and by arranging a first spring, the piston rod can be conveniently buffered.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a hydraulic cylinder with good sealing effect. Background Technology

[0002] A hydraulic cylinder is a device that uses hydraulic fluid as its working medium to transmit motion and power through changes in sealed volume. Its working principle is primarily based on Pascal's principle, which states that pressure in a closed fluid can be transmitted in all directions without changing magnitude. In a hydraulic cylinder, the power unit converts the mechanical energy of the prime mover into the pressure energy of the hydraulic fluid; the actuator converts the hydraulic pressure energy input from the hydraulic pump into the mechanical energy to drive the working mechanism. Hydraulic cylinders are widely used in various fields, such as construction machinery (excavators, loaders, bulldozers, etc.), metallurgical equipment (steel presses, cold rolling mills, etc.), the automotive industry (chassis suspension systems, steering systems, etc.), mining equipment (mining cranes, mine supports, etc.), agricultural machinery (tractors, harvesters, etc.), and aerospace and marine engineering. In these fields, hydraulic cylinders are used to control the movement of various components to achieve various mechanical actions and tasks.

[0003] Hydraulic cylinders play a crucial role in hydraulic systems, converting hydraulic energy into mechanical energy. They are characterized by simple structure, high output force, stable and reliable performance, convenient use and maintenance, and wide application range. However, poor sealing can lead to hydraulic oil leakage, which not only wastes hydraulic oil and increases production costs, but also increases procurement costs due to frequent oil replenishment. Secondly, some cylinders lacking cushioning may cause the piston rod to impact the cylinder head or other components at high speeds. This enormous impact force can damage the cylinder itself, such as causing cylinder deformation and cylinder head cracks. Long-term impacts will accelerate the wear of components such as the piston rod, cylinder barrel, and seals, shortening their service life. Seals, in particular, may be more prone to aging, hardening, or breakage due to excessive impact force. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic cylinder with good sealing performance to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder with good sealing effect, comprising a cylinder body, and further comprising:

[0006] A piston rod slides on the inner wall of a cylinder. A mounting plate is fixed to the top of the cylinder. A fixing block is fixed to the top of the mounting plate. A bolt rotates on the inner wall of the fixing block. A limit block is installed at one end of the bolt. A first sealing ring is provided on one side of the limit block.

[0007] A support block is fixed to the inner wall of the cylinder. A connecting rod is fixed to the inner wall of the support block. A limiting piece is fixed to the outer side of the piston rod, and the inner wall of the limiting piece is slidably connected to the outer side of the connecting rod. A first spring is fixed to the bottom of the piston rod.

[0008] Preferably, a connecting block is installed on the top of the piston rod, and a limit ring is fixed on the outer side of the piston rod.

[0009] Preferably, a fixing ring is fixed to the outer side of the cylinder body, and a support leg is fixed to the outer side of the fixing ring.

[0010] Preferably, a fixing rod is fixed to the outer side of the fixing ring, and a handle is fixed to the outer side of the fixing rod.

[0011] Preferably, the inner wall of the cylinder is connected to an oil inlet pipe, and a screw is rotatably mounted at the bottom of the oil inlet pipe.

[0012] Preferably, one end of the oil inlet pipe is fixed with an installation ring, one end of the installation ring is rotatably fitted with a sealing plate, and a second sealing ring is installed on the inner wall of the installation ring.

[0013] Preferably, a second spring is installed on the outer side of the mounting plate, a third sealing ring is installed on the inner wall of the mounting plate, and one end of the second spring is fixedly connected to the outer side of the third sealing ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model facilitates the installation of a fixing block via an mounting plate, facilitates the installation of bolts via the fixing block, facilitates the pushing of a limiting block via the bolts, facilitates the tightening of the first sealing ring via the limiting block, thereby improving the sealing performance of the device. The support block facilitates the installation of a connecting rod, facilitates the limiting of the piston rod to prevent it from colliding with the cylinder body via the connecting rod, facilitates the limiting of the piston rod via a limiting plate, and facilitates the buffering of the piston rod via a first spring. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the hydraulic cylinder with good sealing effect provided by this utility model;

[0017] Figure 2 A schematic diagram of the piston rod structure provided by this utility model;

[0018] Figure 3 for Figure 2 A magnified structural diagram at point A is shown below;

[0019] Figure 4 A schematic diagram of the limiting piece structure provided by this utility model;

[0020] Figure 5 A schematic diagram of the fixing ring structure provided by this utility model.

[0021] In the diagram: 1. Cylinder block; 2. Piston rod; 3. Mounting plate; 4. Fixing block; 5. Bolt; 6. Limiting block; 7. First sealing ring; 8. Support block; 9. Connecting rod; 10. Limiting plate; 11. First spring; 12. Connecting block; 13. Limiting ring; 14. Fixing ring; 15. Support leg; 16. Fixing rod; 17. Handle; 18. Oil inlet pipe; 19. Screw; 20. Mounting ring; 21. Sealing plate; 22. Second sealing ring; 23. Second spring; 24. Third sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 As shown, a hydraulic cylinder with good sealing effect includes a cylinder body 1, a piston rod 2 slidingly mounted on the inner wall of the cylinder body 1, and a mounting plate 3 fixed to the top of the cylinder body 1. The mounting plate 3 facilitates the installation of a fixing block 4. The fixing block 4 is also fixed to the top of the mounting plate 3, facilitating the installation of a bolt 5. The bolt 5 rotates on the inner wall of the fixing block 4, allowing for the pushing of a limiting block 6. The limiting block 6 is mounted on one end of the bolt 5, facilitating the limiting of a first sealing ring 7. The first sealing ring 7 is located on one side of the limiting block 6, facilitating the operation of the piston rod 2. To improve sealing, a support block 8 is fixed to the inner wall of the cylinder body 1. By setting the support block 8, it is easy to install the connecting rod 9. The connecting rod 9 is fixed to the inner wall of the support block 8. By setting the connecting rod 9, it is easy to cooperate with the limiting plate 10 to limit the piston rod 2. The limiting plate 10 is fixed to the outer side of the piston rod 2. By setting the limiting plate 10, it is easy to cooperate with the connecting rod 9, thereby facilitating the limitation of the piston rod 2. The inner wall of the limiting plate 10 is slidably connected to the outer side of the connecting rod 9. A first spring 11 is fixed to the bottom of the piston rod 2. By setting the first spring 11, it is easy to buffer the piston rod 2, thereby preventing damage to internal parts and extending service life.

[0024] A connecting block 12 is installed on the top of the piston rod 2, and a limit ring 13 is fixed on the outside of the piston rod 2. By setting the connecting block 12, it is easy to connect other devices, and by setting the limit ring 13, it is easy to limit the piston rod 2.

[0025] A fixing ring 14 is fixed to the outside of the cylinder body 1, and a support leg 15 is fixed to the outside of the fixing ring 14. By setting the fixing ring 14, it is easy to install the support leg 15, and by installing the support leg 15, it is easy to place the main body.

[0026] A fixing rod 16 is fixed to the outside of the fixing ring 14, and a handle 17 is fixed to the outside of the fixing rod 16. By setting the fixing rod 16, it is easy to install the handle 17. By setting the handle 17, it is easy to move the main body when needed.

[0027] The inner wall of the cylinder 1 is connected to an oil inlet pipe 18, and a screw 19 is rotatably mounted at the bottom of the oil inlet pipe 18. By setting the oil inlet pipe 18, it is easy to install the screw 19, and by setting the screw 19, it is easy to clean and drain excess oil in the pipe.

[0028] An installation ring 20 is fixed to one end of the oil inlet pipe 18, and a sealing plate 21 is rotatably mounted on one end of the installation ring 20. A second sealing ring 22 is installed on the inner wall of the installation ring 20. By setting the installation ring 20, it is easy to install the sealing plate 21. By setting the sealing plate 21, it is easy to seal the oil inlet pipe 18. By setting the second sealing ring 22, it is easy to improve the sealing performance of the oil inlet pipe 18.

[0029] A second spring 23 is installed on the outer side of the mounting plate 3, and a third sealing ring 24 is installed on the inner wall of the mounting plate 3. One end of the second spring 23 is fixedly connected to the outer side of the third sealing ring 24. Through the cooperation of the second spring 23 and the third sealing ring 24, the sealing performance of the piston rod 2 during operation can be further improved.

[0030] Working principle: First, move the device to the appropriate position using the handle 17. Then, push the limiting block 6 forward by rotating the bolt 5, thereby adjusting the first sealing ring 7 to a suitable sealing degree. Then, start the device. At this time, the piston rod 2 will drive the limiting plate 10 and the first spring 11 to move vertically. During the movement, the limiting plate 10 and the connecting rod 9 will limit the piston rod 2 to prevent it from hitting the cylinder 1. When it moves to the bottom, the first spring 11 will provide a buffer. When oil needs to be added, open the sealing plate 21 and connect the oil inlet pipe 18 through the mounting ring 20. After the oil is finished, turn the screw 19 to release the excess oil in the oil inlet pipe 18.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with good sealing effect, comprising a cylinder body (1), characterized in that, Also includes: A piston rod (2) slides on the inner wall of the cylinder (1). A mounting plate (3) is fixed on the top of the cylinder (1). A fixing block (4) is fixed on the top of the mounting plate (3). A bolt (5) rotates on the inner wall of the fixing block (4). A limit block (6) is installed on one end of the bolt (5). A first sealing ring (7) is provided on one side of the limit block (6). A support block (8) is fixed to the inner wall of the cylinder (1). A connecting rod (9) is fixed to the inner wall of the support block (8). A limit plate (10) is fixed to the outer side of the piston rod (2). The inner wall of the limit plate (10) is slidably connected to the outer side of the connecting rod (9). A first spring (11) is fixed to the bottom of the piston rod (2).

2. A hydraulic cylinder with good sealing effect according to claim 1, characterized in that: A connecting block (12) is installed on the top of the piston rod (2), and a limit ring (13) is fixed on the outside of the piston rod (2).

3. A hydraulic cylinder with good sealing effect according to claim 1, characterized in that: A fixing ring (14) is fixed to the outside of the cylinder (1), and a support leg (15) is fixed to the outside of the fixing ring (14).

4. A hydraulic cylinder with good sealing effect according to claim 3, characterized in that: A fixing rod (16) is fixed to the outside of the fixing ring (14), and a handle (17) is fixed to the outside of the fixing rod (16).

5. A hydraulic cylinder with good sealing effect according to claim 1, characterized in that: The inner wall of the cylinder (1) is connected to an oil inlet pipe (18), and a screw (19) rotates at the bottom of the oil inlet pipe (18).

6. A hydraulic cylinder with good sealing effect according to claim 5, characterized in that: One end of the oil inlet pipe (18) is fixed with an installation ring (20), one end of the installation ring (20) is rotatably fitted with a sealing plate (21), and the inner wall of the installation ring (20) is fitted with a second sealing ring (22).

7. A hydraulic cylinder with good sealing effect according to claim 1, characterized in that: A second spring (23) is installed on the outer side of the mounting plate (3), and a third sealing ring (24) is installed on the inner wall of the mounting plate (3), and one end of the second spring (23) is fixedly connected to the outer side of the third sealing ring (24).

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