Swing type hydraulic cylinder

Abstract

The utility model relates to the technical field of swing type hydraulic cylinders, and discloses a swing type hydraulic cylinder which comprises a hydraulic cylinder barrel, a first oil inlet pipe connector and a second oil inlet pipe connector are symmetrically arranged on the back face of the hydraulic cylinder barrel, and a cylinder cover is arranged at the bottom end of the hydraulic cylinder barrel. According to the swing type hydraulic cylinder, the inner connecting structure is arranged, when a piston ring or a piston rod is damaged and needs to be replaced with a new part, the piston ring or the piston rod can be smoothly installed only by accurately aligning an alignment groove in a connecting disc on the upper portion of the piston rod with an alignment block and inserting the alignment block and then fastening the piston ring or the piston rod through a second fastening bolt; the whole internal part does not need to be replaced, the maintenance cost is greatly reduced, when the swing type hydraulic cylinder is installed, the main inserting block and the auxiliary inserting block on the outer side of the outer connecting plate are aligned with the main inserting groove and the auxiliary inserting groove in the lantern ring to be inserted into the main inserting groove and the auxiliary inserting groove in the lantern ring till the main inserting block and the auxiliary inserting block are completely in place, then the shackle and the lock hook are hooked, installation can be completed, tools such as a wrench are not needed in the whole process, and installation is convenient. And the underwater installation difficulty is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic drive technology, specifically to a swing-type hydraulic cylinder. Background Technology

[0002] A swing-type hydraulic cylinder is a hydraulic component used for buffering and shock absorption. It is usually composed of a cylinder body, piston, piston rod, buffer valve and other components. Its working principle is to utilize the compressibility and damping effect of hydraulic oil. When the piston rod is impacted by an external force, the piston moves in the cylinder body, causing the hydraulic oil to throttle through the buffer valve, converting the impact energy into the pressure energy and heat energy of the hydraulic oil, thereby achieving a buffering effect.

[0003] As prior art, Chinese utility model patent with publication number CN222141656U specifically discloses a servo hydraulic cylinder with a buffer function. This servo hydraulic cylinder with a buffer function has a spring fixedly installed at one end of the hydraulic rod inside the hydraulic cylinder, and a buffer sleeve at the cylinder port. This provides a protective structure during the extension and retraction of the hydraulic rod when the hydraulic cylinder is working, which can absorb the impact and vibration during the operation of the hydraulic cylinder, protect the hydraulic cylinder, and extend its service life.

[0004] In the existing servo hydraulic cylinder solutions described above, there is generally no corresponding auxiliary installation structure. This makes it inconvenient to position and install these hydraulic cylinders underwater, and the operation is difficult. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a swing hydraulic cylinder. This solution can effectively solve the problems existing in the prior art by adding an auxiliary installation structure to the hydraulic cylinder.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A swing-type hydraulic cylinder includes a cylinder barrel. A first oil inlet port and a second oil inlet port are symmetrically arranged on the back of the cylinder barrel. A cylinder head is provided at the bottom end of the cylinder barrel. An auxiliary mounting assembly is provided on the outer side of the middle part of the cylinder barrel. An upper chamber and a lower chamber are provided inside the cylinder barrel. A return spring is provided inside the upper chamber. A piston ring is provided inside the lower chamber. A piston rod is provided below the piston ring. An internal connecting structure is provided between the piston ring and the piston rod. The piston rod passes through the cylinder head and extends to the lower part of the cylinder head.

[0008] Preferably, the auxiliary installation component includes a collar, which is fixedly installed on the outside of the hydraulic cylinder barrel by bolts. The collar has a main insertion groove and a secondary insertion groove on the side of the back of the hydraulic cylinder barrel. An outer connecting plate is provided on the outside of the collar. A main insertion block and a secondary insertion block are provided on the side of the outer connecting plate near the collar. First fastening bolts are provided at the four corners of the side of the outer connecting plate. A hook is fixedly installed on the outside of the secondary insertion block. A locking hook is fixedly installed on the outside of the collar.

[0009] Preferably, the main plug-in block and the main plug-in slot are plugged in, the auxiliary plug-in block and the auxiliary plug-in slot are plugged in, the hook and the lock are hooked together, and the auxiliary plug-in block and the hook and the lock are provided with two of the same type, and are symmetrically distributed about the horizontal center line of the main plug-in block.

[0010] With the above technical solution, during the installation of a swing-type hydraulic cylinder, the main plug block and the auxiliary plug block on the outer side of the outer connecting plate are aligned with the main plug groove and the auxiliary plug groove on the collar and inserted until the main plug block is completely inserted into the main plug groove and the auxiliary plug block is completely inserted into the auxiliary plug groove. Then, the hook and the locking hook are hooked together to complete the installation of the auxiliary installation component. The operation is simple, can achieve quick connection, does not require the use of wrenches or other tools, and reduces the difficulty of operation during underwater installation.

[0011] Preferably, the internal connection structure includes an alignment block and a connecting plate. The alignment block is fixedly installed on the lower part of the piston ring, the connecting plate is located at the top of the piston rod, the outer side of the connecting plate is provided with an alignment groove that matches the alignment block, the lower part of the piston ring is provided with a threaded hole, and the bottom end of the connecting plate is provided with a second fastening bolt.

[0012] Preferably, the number of alignment blocks and alignment slots are the same, the alignment blocks and alignment slots are plug-in connected, and the second fastening bolt passes through the connecting plate and extends into the interior of the threaded hole.

[0013] With the above technical solution, when installing or maintaining the piston rings and piston rod, simply align the alignment groove on the upper connecting plate of the piston rod with the alignment block and insert it until the alignment block is fully inserted into the alignment groove. Then, use the second fastening bolt to tighten it to complete the installation of the piston rod and piston rings. The operation is simple and the maintenance is convenient.

[0014] Preferably, the hydraulic cylinder barrel has a first oil inlet at the top of the upper chamber, a second oil inlet on the inner diameter surface of the lower chamber, and a connector at the lower part of the piston rod.

[0015] Preferably, the first oil inlet pipe interface is connected to the first oil inlet, the second oil inlet pipe interface is connected to the second oil inlet, and the upper chamber is connected to the lower chamber.

[0016] With the above technical solution, during use, the second oil inlet pipe interface can be connected separately according to the actual situation, or both the first and second oil inlet pipe interfaces can be connected to the external oil supply pipeline. When only the second oil inlet pipe interface is connected, the second oil inlet pipe interface delivers hydraulic oil to the interior of the lower chamber through the second oil inlet. At this time, the hydraulic oil inside the lower chamber squeezes the piston ring, and the piston ring moves upward under force. At this time, the return spring is squeezed. When the pressure of the second oil inlet pipe interface is released, the return spring pushes the piston ring to move in the opposite direction until the piston ring moves to the initial state. When both the first and second oil inlet pipe interfaces are connected to the external oil supply pipeline, the piston ring swings precisely according to the different pressures above and below.

[0017] Compared with the prior art, the swing-type hydraulic cylinder provided by this utility model has the following beneficial effects:

[0018] 1. This swing-type hydraulic cylinder is equipped with an internal connection structure. When the piston ring or piston rod is damaged and a new piston ring or piston rod needs to be installed, simply align the alignment groove on the upper connecting plate of the piston rod with the alignment block and insert it. Then, use the second fastening bolt to tighten it to complete the installation of the piston ring or piston rod. The operation is simple and the maintenance is convenient. There is no need to replace the entire internal parts.

[0019] 2. This swing-type hydraulic cylinder is equipped with an auxiliary installation component. Align the main plug block and auxiliary plug block on the outer side of the outer connecting plate with the main plug groove and auxiliary plug groove on the collar and insert them until the main plug block is completely inserted into the main plug groove and the auxiliary plug block is completely inserted into the auxiliary plug groove. Then hook the hook and lock together to complete the installation of the auxiliary installation component. The operation is simple and can achieve quick connection without the need for wrenches or other tools, reducing the difficulty of underwater installation and improving practicality. Attached Figure Description

[0020] Figure 1 This is a first-view perspective three-dimensional structural diagram of the swing-type hydraulic cylinder in this utility model;

[0021] Figure 2 This is a second-view three-dimensional structural diagram of the swing-type hydraulic cylinder in this utility model;

[0022] Figure 3 This is a first-view half-sectional structural diagram of the swing-type hydraulic cylinder in this utility model;

[0023] Figure 4 This is a second-view half-sectional structural diagram of the swing-type hydraulic cylinder in this utility model;

[0024] Figure 5 This is a schematic diagram of the internal connection structure and installation structure of the swing hydraulic cylinder in this utility model;

[0025] Figure 6 This is a first-view split view of the auxiliary installation component of the swing-type hydraulic cylinder in this utility model;

[0026] Figure 7 This is a second-view split-structure diagram of the auxiliary installation component of the swing-type hydraulic cylinder in this utility model.

[0027] The components include: 1. Hydraulic cylinder barrel; 2. First oil inlet pipe interface; 3. Second oil inlet pipe interface; 4. Auxiliary installation components; 401. Collar; 402. Main insertion groove; 403. Secondary insertion groove; 404. Outer connecting plate; 405. First fastening bolt; 406. Main insertion block; 407. Secondary insertion block; 408. Hook ring; 409. Locking hook; 5. First oil inlet; 6. Second oil inlet; 7. Upper chamber; 8. Lower chamber; 9. Return spring; 10. Piston ring; 11. Cylinder head; 12. Piston rod; 13. Connector; 14. Internal connecting structure; 1401. Alignment block; 1402. Connecting plate; 1403. Alignment groove; 1404. Threaded hole; 1405. Second fastening bolt. Detailed Implementation

[0028] 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.

[0029] Example 1:

[0030] like Figure 1-4 As shown in the figure, this example provides a swing-type hydraulic cylinder, which specifically includes a hydraulic cylinder barrel 1. The back of the hydraulic cylinder barrel 1 is symmetrically provided with a first oil inlet port 2 and a second oil inlet port 3. The bottom end of the hydraulic cylinder barrel 1 is provided with a cylinder head 11. The outer side of the middle part of the hydraulic cylinder barrel 1 is provided with an auxiliary mounting assembly 4. The inside of the hydraulic cylinder barrel 1 is provided with an upper chamber 7 and a lower chamber 8. The upper chamber 7 is provided with a return spring 9. The lower chamber 8 is provided with a piston ring 10. The lower part of the piston ring 10 is provided with a piston rod 12. An internal connecting structure 14 is provided between the piston ring 10 and the piston rod 12. The piston rod 12 passes through the cylinder head 11 and extends to the lower part of the cylinder head 11.

[0031] Based on this, see further Figure 6 and Figure 7In this example, the auxiliary installation component 4 specifically includes a collar 401, which is bolted to the outside of the hydraulic cylinder barrel 1. The collar 401 has a main insertion groove 402 and a secondary insertion groove 403 on the side of the back of the hydraulic cylinder barrel 1. An outer connecting plate 404 is provided on the outside of the collar 401. A main insertion block 406 and a secondary insertion block 407 are provided on the side of the outer connecting plate 404 near the collar 401. A fourth insertion block 406 is provided at the four corners of the outer connecting plate 404. A fastening bolt 405 is used. A hook 408 is fixedly installed on the outer side of the auxiliary plug block 407. A locking hook 409 is fixedly installed on the outer side of the collar 401. The main plug block 406 is plugged into the main plug groove 402. The auxiliary plug block 407 is plugged into the auxiliary plug groove 403. The hook 408 and the locking hook 409 are hooked together. The auxiliary plug block 407, hook 408 and locking hook 409 are all provided with two of the same type, and they are symmetrically distributed about the horizontal center line of the main plug block 406.

[0032] Based on this structure, the auxiliary installation component 4, during the installation of the swing hydraulic cylinder, aligns the main plug block 406 and the auxiliary plug block 407 on the outer side of the outer connecting plate 404 with the main plug groove 402 and the auxiliary plug groove 403 on the collar 401 and inserts them until the main plug block 406 is fully inserted into the main plug groove 402 and the auxiliary plug block 407 is fully inserted into the auxiliary plug groove 403. Then, hooks 408 and locking hooks 409 are hooked together to complete the installation of the auxiliary installation component 4. The operation is simple, can achieve quick connection, does not require the use of wrenches or other tools, and reduces the difficulty of operation during underwater installation.

[0033] Example 2:

[0034] Based on the scheme in Example 1, this example further presents a specific configuration scheme for the inner connection structure 14.

[0035] See Figure 5 The internal connection structure 14 given in this example includes an alignment block 1401 and a connecting plate 1402. The alignment block 1401 is fixedly installed on the lower part of the piston ring 10, and the connecting plate 1402 is located at the top of the piston rod 12. An alignment groove 1403 adapted to the alignment block 1401 is opened on the outer side of the connecting plate 1402. A threaded hole 1404 is opened on the lower part of the piston ring 10. A second fastening bolt 1405 is provided at the bottom end of the connecting plate 1402. The number of alignment blocks 1401 and alignment grooves 1403 are the same. The alignment blocks 1401 and alignment grooves 1403 are plug-in connected. The second fastening bolt 1405 passes through the connecting plate 1402 and extends into the interior of the threaded hole 1404.

[0036] Based on the internal connection structure 14 configured in this way, when installing or maintaining the piston ring 10 and piston rod 12, simply align the alignment groove 1403 on the upper connecting plate 1402 of the piston rod 12 with the alignment block 1401 and insert it until the alignment block 1401 is fully inserted into the alignment groove 1403. Then, use the second fastening bolt 1405 to tighten it to complete the installation of the piston rod 12 and piston ring 10. The operation is simple and the maintenance is convenient.

[0037] Example 3:

[0038] This example provides an improved solution based on the solutions in Example 1 and Example 2.

[0039] Combination Figures 1 to 4 As shown, in this example, a first oil inlet 5 is provided at the top of the upper chamber 7 inside the hydraulic cylinder barrel 1, and a second oil inlet 6 is provided on the inner diameter surface of the lower chamber 8 inside the hydraulic cylinder barrel 1. A connector 13 is provided at the lower part of the piston rod 12. The first oil inlet pipe interface 2 is connected to the first oil inlet 5, the second oil inlet pipe interface 3 is connected to the second oil inlet 6, and the upper chamber 7 and the lower chamber 8 are connected to each other.

[0040] This configuration allows for the separate connection of the second oil inlet port 3 to the swing-type hydraulic cylinder, or the connection of both the first oil inlet port 2 and the second oil inlet port 3 to the external oil supply pipeline, depending on the actual situation. When only the second oil inlet port 3 is connected, the second oil inlet port 3 delivers hydraulic oil to the interior of the lower chamber 8 through the second oil inlet port 6. At this time, the hydraulic oil inside the lower chamber 8 compresses the piston ring 10, causing the piston ring 10 to move upward under force. At this time, the return spring 9 is compressed. When the second oil inlet port 3 is depressurized, the return spring 9 pushes the piston ring 10 to move in the opposite direction until the piston ring 10 moves to the initial state. When both the first oil inlet port 2 and the second oil inlet port 3 are connected to the external oil supply pipeline, the piston ring 10 swings precisely according to the difference in upper and lower pressure.

[0041] Regarding the swing-type hydraulic cylinder formed based on the above example scheme, the following is combined with the appendix. Figures 1 to 7 Let me explain its usage in detail.

[0042] When using this swing-type hydraulic cylinder, the second oil inlet port 3 can be connected separately depending on the actual situation, or both the first oil inlet port 2 and the second oil inlet port 3 can be connected to the external oil supply pipeline. When only the second oil inlet port 3 is connected, the second oil inlet port 3 delivers hydraulic oil to the interior of the lower chamber 8 through the second oil inlet port 6. At this time, the hydraulic oil inside the lower chamber 8 squeezes the piston ring 10, and the piston ring 10 moves upward under force. At this time, the return spring 9 is squeezed.

[0043] When the second oil inlet port 3 is depressurized, the return spring 9 pushes the piston ring 10 to move until the piston ring 10 moves to the initial state. When both the first oil inlet port 2 and the second oil inlet port 3 are connected to the external oil supply pipe, the piston ring 10 swings precisely according to the difference in the upper and lower pressures to meet the needs of underwater environments.

[0044] During installation, align the main plug block 406 and the auxiliary plug block 407 on the outer side of the outer connecting plate 404 with the main plug groove 402 and the auxiliary plug groove 403 on the collar 401 and insert them until the main plug block 406 is fully inserted into the main plug groove 402 and the auxiliary plug block 407 is fully inserted into the auxiliary plug groove 403. Then hook the hook ring 408 and the locking hook 409 together to complete the installation of the auxiliary installation component 4. The operation is simple, the installation is convenient, and a quick connection can be achieved.

[0045] No wrenches or other tools are needed. After long-term use, when the piston ring 10 is damaged and a new piston ring 10 and the old piston rod 12 need to be reinstalled, simply align the alignment groove 1403 on the upper connecting plate 1402 of the piston rod 12 with the alignment block 1401 and insert it until the alignment block 1401 is fully inserted into the alignment groove 1403. Then, use the second fastening bolt 1405 to tighten it to complete the installation of the piston rod 12 and piston ring 10. The operation is simple and maintenance is convenient.

[0046] 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 swing-type hydraulic cylinder, comprising a hydraulic cylinder barrel (1), characterized in that: The hydraulic cylinder barrel (1) is symmetrically provided with a first oil inlet pipe interface (2) and a second oil inlet pipe interface (3) on its back side. The bottom end of the hydraulic cylinder barrel (1) is provided with a cylinder head (11). An auxiliary installation component (4) is provided on the outer side of the middle part of the hydraulic cylinder barrel (1). The inside of the hydraulic cylinder barrel (1) is provided with an upper chamber (7) and a lower chamber (8). The upper chamber (7) is provided with a return spring (9). The lower chamber (8) is provided with a piston ring (10). The lower part of the piston ring (10) is provided with a piston rod (12). An internal connection structure (14) is provided between the piston ring (10) and the piston rod (12). The piston rod (12) passes through the cylinder head (11) and extends to the lower part of the cylinder head (11).

2. The swing-type hydraulic cylinder according to claim 1, characterized in that: The auxiliary installation component (4) includes a collar (401), which is fixedly installed on the outside of the hydraulic cylinder barrel (1) by bolts. The collar (401) has a main insertion groove (402) and a secondary insertion groove (403) on the side of the back of the hydraulic cylinder barrel (1). An outer connecting plate (404) is provided on the outside of the collar (401). A main insertion block (406) and a secondary insertion block (407) are provided on the side of the outer connecting plate (404) near the collar (401). A first fastening bolt (405) is provided at the four corners of the side of the outer connecting plate (404). A hook ring (408) is fixedly installed on the outside of the secondary insertion block (407). A locking hook (409) is fixedly installed on the outside of the collar (401).

3. A swing-type hydraulic cylinder according to claim 2, characterized in that: The main plug-in block (406) is plugged into the main plug-in slot (402), the auxiliary plug-in block (407) is plugged into the auxiliary plug-in slot (403), the hook ring (408) and the lock hook (409) are hooked together, and the auxiliary plug-in block (407) and the hook ring (408) and the lock hook (409) are provided with two of the same type, and are symmetrically distributed about the horizontal center line of the main plug-in block (406).

4. A swing-type hydraulic cylinder according to claim 1, characterized in that: The inner connection structure (14) includes an alignment block (1401) and a connecting plate (1402). The alignment block (1401) is fixedly installed on the lower part of the piston ring (10). The connecting plate (1402) is located at the top of the piston rod (12). An alignment groove (1403) adapted to the alignment block (1401) is opened on the outer side of the connecting plate (1402). A threaded hole (1404) is opened on the lower part of the piston ring (10). A second fastening bolt (1405) is provided at the bottom end of the connecting plate (1402).

5. A swing-type hydraulic cylinder according to claim 4, characterized in that: The number of alignment blocks (1401) and alignment grooves (1403) is the same. The alignment blocks (1401) and alignment grooves (1403) are plug-in connected. The second fastening bolt (1405) passes through the connecting plate (1402) and extends into the interior of the threaded hole (1404).

6. A swing-type hydraulic cylinder according to claim 1, characterized in that: The hydraulic cylinder barrel (1) has a first oil inlet (5) located at the top of the upper chamber (7), and a second oil inlet (6) located on the inner diameter surface of the lower chamber (8). The piston rod (12) has a connector (13) at its lower part.

7. A swing-type hydraulic cylinder according to claim 6, characterized in that: The first oil inlet pipe interface (2) is connected to the first oil inlet (5), the second oil inlet pipe interface (3) is connected to the second oil inlet (6), and the upper chamber (7) is connected to the lower chamber (8).

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