Anti-leakage hydraulic cylinder

Abstract

The present invention belongs to the technical field of hydraulic cylinders, and discloses an anti-leakage hydraulic cylinder, including a hydraulic cylinder body, a first flange fixedly mounted on one side of the hydraulic cylinder body, and a piston rod movably sleeved inside the hydraulic cylinder body. The present invention achieves the purpose of preventing the hydraulic cylinder from leaking oil by providing a first sealing gasket, a support ring, and a connecting hole, etc. During the process of injecting oil into the hydraulic cylinder body, the pressure inside the hydraulic cylinder body increases, and at this time, the first sealing gasket is squeezed by the hydraulic oil inside the hydraulic cylinder body, and the inner wall and the outer wall of the first sealing gasket are compressed respectively, and the contact area with the outside of the piston rod is increased by the inner wall of the first sealing gasket, so that the sealing effect between the hydraulic cylinder body and the piston rod is better, and the hydraulic cylinder body and the piston rod are secondary sealed by the second sealing gasket and the first sealing gasket, so as to avoid oil leakage when the hydraulic cylinder is opened and closed for a long time, so as to achieve the effect of preventing the hydraulic cylinder from leaking oil.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic cylinders, in particular to an anti-leakage hydraulic cylinder. Background Art

[0002] The veneer press series are suitable for neutral furniture factories or small-scale wood-based panel secondary processing professional veneer factories. They are used for hot pressing and bonding furniture panels, building partitions, wooden doors and various wood-based panels. The hydraulic cylinder is the core part of the hydraulic system in the hot pressing veneer machine. It is subjected to impact pressure under fast opening and closing speeds. Therefore, high requirements are placed on the structural quality and sealing performance of the hydraulic cylinder.

[0003] The Chinese patent published as CN202010625304.2 discloses a leak-proof seal for a hydraulic cylinder. The patent solves the problem that the current hydraulic cylinders are seriously leaking oil, causing economic losses and energy waste. At present, all the leak-proof seals for hydraulic cylinders in life are installed inside the hydraulic cylinders. The entire hydraulic cylinder needs to be disassembled for installation, which is very likely to cause mechanical damage and dust entry, reducing the life of the hydraulic cylinder. This patent has been passed by adding a sealing ring to the leak-proof seal for the hydraulic cylinder, effectively solving the problem of serious oil leakage in the hydraulic cylinder, and finally achieving the purpose of preventing oil leakage in the hydraulic cylinder.

[0004] At present, most wood processing veneer presses adopt the more conventional plunger type hydraulic cylinders. Piston type hydraulic cylinders can be divided into two structures: single-rod type and double-rod type. In the single-acting hydraulic cylinder, the pressure oil is only supplied to one chamber of the hydraulic cylinder, and the cylinder is driven by liquid pressure to realize unidirectional movement, while the reverse direction movement is realized by external forces such as spring force, deadweight or external load. The hydraulic cylinder is often opened and closed quickly during use. The friction between the working piston rod and the cylinder body increases with long-term rapid opening and closing, resulting in an increase in the gap between the piston rod and the cylinder body and oil leakage. In mild cases, the working efficiency of the hydraulic cylinder is reduced, and in severe cases, the performance of the entire hot pressing veneer machine is reduced, the pressure cannot be increased, and it may even fail to work. The application of the present invention is directed to the single-acting hydraulic cylinder. Summary of the invention

[0005] (1) Technical issues to be solved

[0006] In order to solve the problems raised in the above-mentioned background technology, the present invention provides an anti-leakage hydraulic cylinder, which is connected to the hydraulic cylinder body through an oil filling pump, and oil is filled into the interior of the hydraulic cylinder body. The piston rod is pushed out by the hydraulic oil injected into the interior of the hydraulic cylinder body. In the process of filling oil into the interior of the hydraulic cylinder body, the pressure inside the hydraulic cylinder body increases. At this time, the first sealing gasket is squeezed by the hydraulic oil inside the hydraulic cylinder body, and the inner wall and the outer wall of the first sealing gasket are respectively compressed. The inner wall of the first sealing gasket increases the contact area with the outside of the piston rod, so that the sealing effect between the hydraulic cylinder body and the piston rod is better. The second sealing gasket and the first sealing gasket are used to perform secondary sealing between the hydraulic cylinder body and the piston rod to avoid oil leakage caused by long-term opening and closing of the hydraulic cylinder, thereby achieving the advantage of anti-leakage of the hydraulic cylinder.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an oil leakage-proof hydraulic cylinder, comprising a hydraulic cylinder body, a first flange fixedly installed on one side of the hydraulic cylinder body, a piston rod movably sleeved inside the hydraulic cylinder body, a connecting shaft fixedly installed on one side of the piston rod, a transmission block fixedly installed on the other side of the piston rod, a protective bin fixedly installed on the other side of the first flange, a dust ring fixedly installed on one side of the protective bin, a cleaning plate fixedly installed on one side of the dust ring, a support ring fixedly installed on one side of the inside of the hydraulic cylinder body, a first sealing gasket fixedly installed on one side of the support ring, a second sealing gasket fixedly installed on the other side of the support ring, connecting holes are provided at equal angles on the surface of the support ring, a dust ring is fixedly installed on the inner wall of the dust ring, a second sealing ring is fixedly installed on the middle part of the inner wall of the support ring, and the first sealing ring is fixedly installed on the left and right ends of the inner wall of the support ring respectively.

[0009] Preferably, a second flange is fixedly installed on the other side of the hydraulic cylinder body, support rods are fixedly installed on the four corners of one side of the second flange, an oil inlet is fixedly installed on the other side of the second flange, clamping grooves are equidistantly provided on the outside of the oil inlet, and a sealing ring is fixedly installed on one side of the oil inlet.

[0010] Preferably, the second sealing gasket is located inside the protective chamber, the inner wall of the second sealing gasket contacts the outside of the piston rod, the outer wall of the second sealing gasket contacts the inner wall of the protective chamber, and one side of the second sealing gasket is made of hard rubber material.

[0011] Preferably, the second sealing gasket is in a "C" shape, the outer wall and the inner wall of the second sealing gasket are both made of soft silicone material, one side of the second sealing gasket is fixedly installed and connected to one side of the support ring, and the second sealing gasket is located outside the connecting hole.

[0012] Preferably, the other side of the first sealing gasket is made of hard rubber material, the outer wall and the inner wall of the first sealing gasket are both made of soft silicone material, and the interiors of the first sealing gasket and the second sealing gasket are both sealed structures.

[0013] Preferably, the inner wall of the first sealing gasket contacts the outside of the piston rod, and the outer wall of the first sealing gasket contacts the inner wall of the hydraulic cylinder body.

[0014] Preferably, the first sealing gasket is located inside the hydraulic cylinder body, the first sealing gasket is fixedly connected to the other side of the support ring, and the first sealing gasket is sleeved on the outside of the communicating hole.

[0015] Preferably, the first sealing gasket is communicated with the interior of the second sealing gasket, the piston rod passes through the interior of the support ring, and the support ring is in contact with the interior of the piston rod.

[0016] Preferably, one side of the cleaning plate is arc-shaped, the inner wall of the cleaning plate is in contact with the outer wall of the piston rod, and the dust ring, the second sealing ring and the first sealing ring are all made of rubber material.

[0017] Preferably, the oil inlet is communicated with the interior of the hydraulic cylinder body, and limiting holes are respectively provided on four sides of the second flange and the first flange.

[0018] (3) Beneficial effects:

[0019] The present invention achieves the purpose of preventing the hydraulic cylinder from leaking oil by providing a first sealing gasket, a support ring and a connecting hole, etc., and connects with the hydraulic cylinder body through an oil filling pump, and fills oil into the interior of the hydraulic cylinder body, and pushes out the piston rod by the hydraulic oil injected into the interior of the hydraulic cylinder body. In the process of filling oil into the interior of the hydraulic cylinder body, the pressure inside the hydraulic cylinder body increases, and at this time, the first sealing gasket is squeezed by the hydraulic oil inside the hydraulic cylinder body, and the inner wall and the outer wall of the first sealing gasket are compressed respectively, and the contact area with the outside of the piston rod is increased by the inner wall of the first sealing gasket, so that the sealing effect between the hydraulic cylinder body and the piston rod is better, and the hydraulic cylinder body and the piston rod are secondary sealed by the second sealing gasket and the first sealing gasket, so as to avoid oil leakage when the hydraulic cylinder is opened and closed for a long time, so as to achieve the effect of preventing the hydraulic cylinder from leaking oil;

[0020] The present invention achieves the purpose of cleaning the dust on the surface of the piston rod by providing a second sealing gasket, a protective bin and a cleaning plate, etc. After the piston rod is completely pushed out, the piston rod is recovered by a reverse force. At this time, the hydraulic oil in the hydraulic cylinder body is discharged through the oil inlet. During the recovery process of the piston rod, the dust and impurities on the outer wall of the piston rod are scraped off by the cleaning plate. At the same time, during the recovery process of the piston rod, the outer wall of the piston rod will contact the inner wall of the second flange, and the second flange is driven to shrink by the piston rod. At the same time, when the hydraulic oil in the hydraulic cylinder body is discharged, the first sealing gasket will be stretched, and the gas inside the second sealing gasket will enter the inside of the first sealing gasket. The contact area between the inner wall and the outside of the piston rod is increased by the compression of the second sealing gasket, and the fine dust on the outside of the piston rod is cleaned by the inner wall of the second sealing gasket, so that the dust is prevented from entering the inside of the hydraulic cylinder body, thereby increasing the service life of the hydraulic cylinder body and achieving the effect of cleaning the dust on the surface of the piston rod.

[0021] The present invention achieves the purpose of easy installation of the hydraulic cylinder by providing an oil inlet, a clamping groove and a sealing ring. The hydraulic cylinder body is installed and fixed on the veneer press through the limiting holes on the four sides of the first flange and the second flange. The oil injection pump is sleeved on the outside of the oil inlet and fixedly sealed through the clamping groove. Oil is injected into the interior of the hydraulic cylinder body through the oil injection pump to push out the piston rod, thereby achieving the effect of easy installation of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall appearance of the present invention;

[0023] Figure 2 It is a schematic diagram of the appearance of one side of the present invention;

[0024] Figure 3 It is a cross-sectional schematic diagram of the present invention;

[0025] Figure 4 For the present invention Figure 3 A magnified schematic diagram of point A;

[0026] Figure 5 For the present invention Figure 3 An enlarged schematic diagram of point B;

[0027] Figure 6 It is a schematic diagram of the assembly of the present invention;

[0028] Figure 7 It is a partial assembly schematic diagram of the present invention;

[0029] Figure 8 This is a schematic diagram of the appearance of the support ring of the present invention.

[0030] In the figure: 1. hydraulic cylinder body; 2. support rod; 3. first flange; 4. second flange; 5. protective chamber; 6. piston rod; 7. dust ring; 8. connecting shaft; 9. support ring; 10. connecting hole; 11. first sealing ring; 12. second sealing ring; 13. first sealing gasket; 14. second sealing gasket; 15. cleaning plate; 16. dust ring; 17. oil inlet; 18. clamping groove; 19. sealing ring; 20. transmission block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 8 As shown, the present invention provides an anti-leakage hydraulic cylinder, including a hydraulic cylinder body 1, a first flange 3 is fixedly installed on one side of the hydraulic cylinder body 1, a piston rod 6 is movably sleeved inside the hydraulic cylinder body 1, a connecting shaft 8 is fixedly installed on one side of the piston rod 6, a transmission block 20 is fixedly installed on the other side of the piston rod 6, a protective bin 5 is fixedly installed on the other side of the first flange 3, a dust ring 7 is fixedly installed on one side of the protective bin 5, a cleaning plate 15 is fixedly installed on one side of the dust ring 7, a support ring 9 is fixedly installed on one side of the hydraulic cylinder body 1, a first sealing gasket 13 is fixedly installed on one side of the support ring 9, a second sealing gasket 14 is fixedly installed on the other side of the support ring 9, a connecting hole 10 is annularly provided at equal angles on the surface of the support ring 9, a dust ring 16 is fixedly installed on the inner wall of the dust ring 7, a second sealing ring 12 is fixedly installed on the middle part of the inner wall of the support ring 9, and a The left and right ends are respectively fixedly installed with a first sealing ring 11; the oil filling end of the oil filling pump is connected to the oil inlet 17, and the oil is filled into the interior of the hydraulic cylinder body 1 through the oil filling pump. The hydraulic oil is injected into the interior of the hydraulic cylinder body 1, and the piston rod 6 is pushed out under the action of the hydraulic oil. In the process of filling oil into the interior of the hydraulic cylinder body 1, the hydraulic pressure inside the hydraulic cylinder body 1 increases. At this time, the first sealing gasket 13 is squeezed by the hydraulic oil inside the hydraulic cylinder body 1, and the inner wall and outer wall of the first sealing gasket 13 are compressed respectively. The inner wall of the first sealing gasket 13 increases the contact area with the outside of the piston rod 6, so that the sealing effect between the hydraulic cylinder body 1 and the piston rod 6 is better. The second sealing ring 12 and the first sealing ring 11 are used to perform secondary sealing between the hydraulic cylinder body 1 and the piston rod 6 to avoid oil leakage when the hydraulic cylinder is opened and closed for a long time, thereby increasing the service life of the hydraulic cylinder.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, a second flange 4 is fixedly installed on the other side of the hydraulic cylinder body 1, and support rods 2 are fixedly installed on the four corners of one side of the second flange 4, and an oil inlet 17 is fixedly installed on the other side of the second flange 4. The outside of the oil inlet 17 is equidistantly provided with snap-in grooves 18, and a sealing ring 19 is fixedly installed on one side of the oil inlet 17; the hydraulic cylinder body 1 is installed and fixed by the first flange 3 and the second flange 4, and the oil injection pump is docked with the oil inlet 17, and fixed to the seal by the snap-in groove 18 to avoid loose docking and prevent the increase of the internal hydraulic pressure of the hydraulic cylinder body 1 from causing the docking pipe to fall off. At the same time, the interior of the hydraulic cylinder body 1 is sealed by the sealing ring 19 to avoid oil leakage during long-term operation.

[0034] like Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown, the other side of the first sealing gasket 13 is made of hard rubber material, the outer wall and the inner wall of the first sealing gasket 13 are both made of soft silicone material, the interior of the first sealing gasket 13 and the second sealing gasket 14 are both sealed structures, the inner wall of the first sealing gasket 13 is in contact with the outside of the piston rod 6, the outer wall of the first sealing gasket 13 is in contact with the inner wall of the hydraulic cylinder body 1, the first sealing gasket 13 is located inside the hydraulic cylinder body 1, the first sealing gasket 13 is fixedly connected to the other side of the support ring 9, the first sealing gasket 13 is sleeved on the outside of the connecting hole 10, the first sealing gasket 13 is connected to the inside of the second sealing gasket 14, the piston rod 6 passes through the inside of the support ring 9, and the support ring 9 is in contact with the inside of the piston rod 6; the oil is fed into the oil pump and the oil inlet 17 The two are connected and oil is injected into the hydraulic cylinder body 1 through an oil injection pump. The oil pressure inside the hydraulic cylinder body 1 increases to push out the piston rod 6 and squeeze the first sealing gasket 13 at the same time. The gas inside the first sealing gasket 13 enters the second sealing gasket 14 through the connecting hole 10. The inner wall and the outer wall of the first sealing gasket 13 are compressed. Since the inner wall and the outer wall of the first sealing gasket 13 are made of soft silicone material, the contact area between the inner wall of the first sealing gasket 13 and the outer part of the piston rod 6 is increased, and the sealing pressure is increased. At the same time, the first sealing gasket 13 is made of hard silicone material, so that the outer part of the first sealing gasket 13 is subjected to pressure and will not be deformed.

[0035] like Figure 3 , Figure 4 , Figure 6 , Figure 7As shown, the second sealing gasket 14 is located inside the protective chamber 5, the inner wall of the second sealing gasket 14 contacts the outside of the piston rod 6, the outer wall of the second sealing gasket 14 contacts the inner wall of the protective chamber 5, one side of the second sealing gasket 14 is made of hard rubber material, the second sealing gasket 14 is "C" shaped, the outer wall and the inner wall of the second sealing gasket 14 are both made of soft silicone material, one side of the second sealing gasket 14 is fixedly installed and connected to one side of the support ring 9, and the second sealing gasket 14 is located outside the connecting hole 10; oil is injected into the interior of the hydraulic cylinder body 1 through the oil injection pump, and the pressure inside the hydraulic cylinder body 1 injects the gas inside the first sealing gasket 13 into the interior of the second sealing gasket 14. After the piston rod 6 is pushed to the predetermined position, the piston rod 6 is recovered by external force. At this time, the liquid inside the hydraulic cylinder body 1 The pressurized oil is discharged through the oil inlet 17, the pressure inside the hydraulic cylinder body 1 is reduced, the first sealing gasket 13 will be stretched, and at the same time, during the recovery of the piston rod 6, the outer wall of the piston rod 6 contacts the second sealing gasket 14 and drives the second sealing gasket 14, so that the second sealing gasket 14 is compressed, and the gas inside the second sealing gasket 14 enters the interior of the first sealing gasket 13 through the connecting hole 10. Since the inner and outer walls of the second sealing gasket 14 are both made of soft silicone material, the second sealing gasket 14 is limited by the inner wall of the protective chamber 5, so that the pressure between the inner wall of the second sealing gasket 14 and the outer wall of the piston rod 6 increases, and the fine dust and impurities on the outer wall of the piston rod 6 are cleaned by the second sealing gasket 14 to avoid entering between the hydraulic cylinder body 1 and the piston rod 6 and affecting the normal use of the hydraulic cylinder body 1.

[0036] like Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, one side of the cleaning plate 15 is arc-shaped, and the inner wall of the cleaning plate 15 is in contact with the outer wall of the piston rod 6. The dust ring 16, the second sealing ring 12 and the first sealing ring 11 are all made of rubber material; by injecting hydraulic oil into the interior of the hydraulic cylinder body 1, the piston rod 6 is pushed out, and then the piston rod 6 is recovered by external force. During the recovery of the piston rod 6, the piston rod 6 will pass through the inside of the dust ring 7, and the impurities on the outer wall of the piston rod 6 are cleaned by the cleaning plate 15, and the fine impurities on the outside of the piston rod 6 are cleaned by the dust ring 16. The rubber material of the dust ring 16 increases the tensile strength of the dust ring 16, so that the dust ring 16 is in closer contact with the outer wall of the piston rod 6, thereby preventing dust from entering the gap between the hydraulic cylinder body 1 and the piston rod 6.

[0037] like Figure 1 , Figure 2 , Figure 5As shown, the oil inlet 17 is connected to the interior of the hydraulic cylinder body 1, and the second flange 4 and the first flange 3 are respectively provided with limiting holes on the four sides; the hydraulic cylinder body 1 is installed and fixed through the limiting holes on the four sides of the first flange 3 and the second flange 4, the oil filling pipe of the oil filling pump is connected to the oil inlet 17, and the clamping groove 18 is used to limit the pressure to prevent the pressure inside the hydraulic cylinder body 1 from increasing and causing the docking pipe to fall off.

[0038] The working principle and use process of the present invention:

[0039] The hydraulic cylinder body 1 is installed and fixed on the veneer press through the limiting holes on the four sides of the first flange 3 and the second flange 4, and the oil injection pump is sleeved on the outside of the oil inlet 17 and fixedly sealed through the clamping groove 18. The inside of the hydraulic cylinder body 1 is injected with oil through the oil injection pump, and the piston rod 6 is pushed out by the hydraulic oil injected into the inside of the hydraulic cylinder body 1. In the process of injecting oil into the inside of the hydraulic cylinder body 1, the hydraulic pressure inside the hydraulic cylinder body 1 increases. At this time, the first sealing gasket 13 is squeezed by the hydraulic oil inside the hydraulic cylinder body 1, and the inner wall and the outer wall of the first sealing gasket 13 are compressed respectively. The inner wall of the first sealing gasket 13 increases the contact area with the outside of the piston rod 6, so that the sealing effect between the hydraulic cylinder body 1 and the piston rod 6 is better. The hydraulic cylinder body 1 and the piston rod 6 are secondary sealed by the second sealing ring 12 and the first sealing ring 11 to avoid oil leakage caused by long-term opening and closing of the hydraulic cylinder;

[0040] After the piston rod 6 is completely pushed out, the piston rod 6 is recovered through the reverse force. At this time, the hydraulic oil inside the hydraulic cylinder body 1 is discharged through the oil inlet 17. At the same time, the dust and impurities on the outer wall of the piston rod 6 are scraped off by the cleaning plate 15 during the recovery process of the piston rod 6, and the fine impurities on the outside of the piston rod 6 are secondary cleaned by the dust ring 16. At the same time, during the recovery process of the piston rod 6, the outer wall of the piston rod 6 will contact the inner wall of the second flange 4, and the second flange 4 will be driven to shrink by the piston rod 6. At the same time, when the hydraulic oil inside the hydraulic cylinder body 1 is discharged, the first sealing gasket 13 will be stretched, and the gas inside the second sealing gasket 14 will enter the inside of the first sealing gasket 13, and the contact area between the inner wall and the outside of the piston rod 6 will be increased through the compression of the second sealing gasket 14. The dust on the outside of the piston rod 6 is cleaned through the inner wall of the second sealing gasket 14 to prevent dust from entering the inside of the hydraulic cylinder body 1, thereby increasing the service life of the hydraulic cylinder body 1.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-leakage hydraulic cylinder, comprising a hydraulic cylinder body (1), characterized in that: A first flange (3) is fixedly mounted on one side of the hydraulic cylinder body (1); a piston rod (6) is movably sleeved inside the hydraulic cylinder body (1); a connecting shaft (8) is fixedly mounted on one side of the piston rod (6); a transmission block (20) is fixedly mounted on the other side of the piston rod (6); a protective bin (5) is fixedly mounted on the other side of the first flange (3); a dustproof ring (7) is fixedly mounted on one side of the protective bin (5); a cleaning plate (15) is fixedly mounted on one side of the dustproof ring (7); and the hydraulic cylinder body (1 ) is fixedly mounted on one side of the interior of the support ring (9), a first sealing gasket (13) is fixedly mounted on one side of the support ring (9), a second sealing gasket (14) is fixedly mounted on the other side of the support ring (9), a connecting hole (10) is provided at an annular and equiangular manner on the surface of the support ring (9), a dustproof ring (16) is fixedly mounted on the inner wall of the dustproof ring (7), a second sealing ring (12) is fixedly mounted in the middle of the inner wall of the support ring (9), and first sealing rings (11) are fixedly mounted on the left and right ends of the inner wall of the support ring (9); The second sealing gasket (14) is located inside the protective chamber (5), the inner wall of the second sealing gasket (14) is in contact with the outside of the piston rod (6), the outer wall of the second sealing gasket (14) is in contact with the inner wall of the protective chamber (5), and one side of the second sealing gasket (14) is made of hard rubber; The second sealing gasket (14) is in a "C" shape, the outer wall and the inner wall of the second sealing gasket (14) are both made of soft silicone material, one side of the second sealing gasket (14) is fixedly installed and connected to one side of the support ring (9), and the second sealing gasket (14) is located outside the connecting hole (10); The other side of the first sealing pad (13) is made of hard rubber material, the outer wall and the inner wall of the first sealing pad (13) are both made of soft silicone material, and the interiors of the first sealing pad (13) and the second sealing pad (14) are both sealed structures; The inner wall of the first sealing gasket (13) contacts the outside of the piston rod (6), and the outer wall of the first sealing gasket (13) contacts the inner wall of the hydraulic cylinder body (1); The first sealing gasket (13) is located inside the hydraulic cylinder body (1), the first sealing gasket (13) is fixedly connected to the other side of the support ring (9), and the first sealing gasket (13) is sleeved on the outside of the connecting hole (10); The first sealing gasket (13) is connected to the interior of the second sealing gasket (14), the piston rod (6) passes through the interior of the support ring (9), and the support ring (9) is in contact with the interior of the piston rod (6).

2. The anti-leakage hydraulic cylinder according to claim 1, characterized in that: A second flange (4) is fixedly mounted on the other side of the hydraulic cylinder body (1); support rods (2) are fixedly mounted on four corners of one side of the second flange (4); an oil inlet (17) is fixedly mounted on the other side of the second flange (4); snap-in grooves (18) are equidistantly formed on the outside of the oil inlet (17); and a sealing ring (19) is fixedly mounted on one side of the oil inlet (17).

3. The anti-leakage hydraulic cylinder according to claim 1, characterized in that: One side of the cleaning plate (15) is arc-shaped, the inner wall of the cleaning plate (15) is in contact with the outer wall of the piston rod (6), and the dust ring (16), the second sealing ring (12) and the first sealing ring (11) are all made of rubber material.

4. The anti-leakage hydraulic cylinder according to claim 2, characterized in that: The oil inlet (17) is connected to the interior of the hydraulic cylinder body (1), and the second flange (4) and the first flange (3) are respectively provided with limiting holes on four sides.

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