Hydraulic oil cylinder with leak-proof function

Abstract

The hydraulic oil cylinder with the anti-leakage function comprises a main cylinder body, an inner cavity is formed in the main cylinder body in a penetrating mode, a piston is movably connected into the inner cavity, one side of the piston is detachably connected with a telescopic rod, and the two ends of the main cylinder body are detachably connected with a front cover and a rear cover correspondingly; the side walls of the tops of the front cover and the rear cover are each fixedly connected with a connecting pipe, a through hole for the telescopic rod to move is formed in the middle of the front cover in a penetrating mode, the front cover is connected with an oil injection pipe through the connecting pipes, hydraulic oil is fed into the inner cavity through the oil injection pipe, and therefore the piston is pushed by hydraulic force to reciprocate in the inner cavity. The triple sealing effect can be achieved through the arranged sealing ring and the pressed sealing gasket, hydraulic oil is effectively prevented from leaking out of the inner cavity, the pressurization groove is formed, the hydraulic oil can enter the pressurization groove, the pressure applied to the pressed sealing gasket can be gradually increased along with the increase of the hydraulic oil, the attaching tightness of the pressed sealing gasket and the outer wall of the telescopic rod is improved, and the service life of the telescopic rod is prolonged. Therefore, the sealing effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of a hydraulic oil cylinder anti-leakage structure, and in particular to a hydraulic oil cylinder with an anti-leakage function. Background Art

[0002] The hydraulic cylinder is a telescopic drive device that converts hydraulic energy into telescopic mechanical energy. Because there is no transmission gap and the movement is smooth, it is widely used in various mechanical equipment. It mainly drives the telescopic shaft to perform reciprocating telescopic activities through the injection and discharge of hydraulic oil at both ends of the cylinder body. In order to ensure that the hydraulic oil provides sufficient driving pressure, it is necessary to ensure that the inside of the cylinder body is in a sealed state to avoid leakage that causes waste and also affects the power output of the hydraulic cylinder.

[0003] The current hydraulic cylinder is mainly composed of a cylinder body, a front cover and a rear cover. Because it is a split type, the sealing requirements for the joints are very high. Usually, multiple sets of sealing rings are used for sealing. As time goes by, the sealing rings are subjected to pressure for a long time, which will affect their sealing effect and eventually cause leakage. In order to solve the problem that the sealing rings are subjected to pressure for a long time and affect the sealing effect, a hydraulic cylinder with anti-leakage function is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the sealing ring becomes fatigued and damaged due to long-term pressure, thereby affecting the sealing effect. A hydraulic cylinder with an anti-leakage function is provided to prevent the sealing ring from being subjected to large pressure for a long time, reduce the probability of the sealing ring being damaged and fatigued due to pressure, increase the service life of the sealing ring and thus ensure the sealing effect.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a hydraulic oil cylinder with anti-leakage function, including a main cylinder body, an inner cavity is opened through the main cylinder body, a piston is movably connected in the inner cavity, and a telescopic rod is detachably connected to one side of the piston, a front cover and a rear cover are detachably connected at both ends of the main cylinder body, a connecting pipe is fixedly connected to the top side wall of the front cover and the rear cover, a through hole is opened through the middle of the front cover for the movement of the telescopic rod, and the front cover and the rear cover have the same structure except for the through hole and the telescopic rod;

[0006] The front cover is provided with a boosting groove on the side wall opposite to the piston and close to the through hole, the boosting groove is a conical structure, a pressure-bearing sealing gasket is fixedly connected to the side wall at the bottom of the boosting groove, the inner wall of the pressure-bearing sealing gasket is tightly fitted on the outer wall of the telescopic rod, the boosting groove is communicated with the inner cavity, the pressure-bearing sealing gasket is a circular ring structure, and the inner wall of the pressure-bearing sealing gasket that is fitted with the telescopic rod is evenly provided with conical grooves;

[0007] The front cover is provided with a pressure relief groove on the side wall of the through hole, and the pressure relief groove is an annular structure. The front cover is located on the inner wall of the through hole and is detachably embedded with two sealing rings. The inner walls of the two sealing rings are tightly fitted on the outer walls of the telescopic rod, and the pressure relief groove is located on the side wall between the two sealing rings.

[0008] As a preferred technical solution of the present invention, a discharge groove is provided in the front cover and at the bottom side wall of the pressure relief groove, the discharge groove is communicated with the interior of the pressure relief groove, the discharge groove is a two-stage downward inclined structure, and the slopes at both ends are different, the opening of the discharge groove away from the pressure relief groove is rotatably connected to a two-way valve plate through a one-way rotating torsion spring, the interior of the discharge groove close to the pressure relief groove is rotatably connected to a one-way valve plate through a two-way rotating torsion spring, and the one-way valve plate is an inclined structure, and the pressure relief groove is communicated with the interior of the inner cavity through the discharge groove.

[0009] As a preferred technical solution of the present invention, a sleeve groove is provided in the middle of the side wall at one end of the front cover opposite to the main cylinder body, and the front cover is sleeved on the side wall at one end of the main cylinder body through the sleeve groove. The outer wall of the main cylinder body at one end close to the front cover is fixedly connected with threaded teeth, and the side wall in the sleeve groove and opposite to the threaded teeth is fixedly connected with a threaded groove corresponding to the threaded teeth. The front cover is detachably threadedly connected to the main cylinder body through the threaded teeth and the threaded groove.

[0010] As a preferred technical solution of the present invention, a connecting concave area is provided on the inner wall of one end of the inner cavity close to the front cover, and the connecting concave area has the same size as the inner ring wall of the sleeve groove, a protrusion is fixedly connected to the side wall at one end of the sleeve groove, a groove is provided on the side wall of the main cylinder body opposite to the protrusion, and the protrusion is inserted in the groove, and a layer of rubber pad is fixedly connected to the outer wall of the end of the main cylinder body inserted in the sleeve groove, and a serrated top block is fixedly connected to the inner ring wall of the sleeve groove and the end opposite to the connecting concave area, the serrated top block is a conical structure and the front end is arc-shaped, and the serrated top block is inserted in the corresponding rubber pad.

[0011] As a preferred technical solution of the present invention, a connecting groove is opened inside the front cover and in the side wall opposite to the connecting pipe. The connecting pipe is a flexible hollow cylindrical structure. The connecting pipe is connected to the inner cavity through the connecting groove. The inner diameter of the connecting groove and the connecting pipe are different. A baffle is fixedly connected to the inner edge of the connecting pipe near the connecting groove. The baffle is a right-angled triangle structure. A slot is set between the baffle and the inner wall of the connecting pipe, and one end of the oil filling pipe is inserted into the slot.

[0012] As a preferred technical solution of the present invention, the outer wall of the connecting tube is fixedly connected to a fixed ring near both ends, one end of the fixed ring is fixedly connected to a movable ring, the inner ring wall of the movable ring is attached to the outer wall of the connecting tube, the outer ring wall of the connecting tube is fixedly connected to two limiting plates, the outer wall of the movable ring at one end near the limiting plate is evenly fixedly connected with serrations, the limiting plate is provided with an insertion hole near the top, and one end of the movable ring is inserted and connected in the insertion hole.

[0013] As a preferred technical solution of the present invention, a positioning plate is fixedly connected to the middle of the outer wall of the connecting tube, the positioning plate is a triangular structure and the top is a circular structure, a through hole is opened through the top of the positioning plate, a rotating rod is inserted and rotatably connected in the through hole, two annular limiting rings are fixedly connected to the inner ring wall of the through hole, a rotating groove is opened on the side wall opposite to the rotating rod and the rotating groove is rotatably sleeved on the limiting ring, and gears are fixedly connected to both ends of the rotating rod, and the gears are meshingly connected to the saw teeth.

[0014] As a preferred technical solution of the present invention, a movable groove is opened in the middle of the bottom side wall of the movable ring, and the movable groove is a T-shaped structure. A top block is slidably connected in the movable groove, and the top block is fixedly connected to the outer wall of one end of the fixed ring through the bottom end.

[0015] The invention has the following advantages: the connecting pipe is connected with the oil filling pipe, and the hydraulic oil is sent into the inner cavity through the oil filling pipe, so that the piston is pushed to reciprocate in the inner cavity by the liquid pressure, and the triple sealing effect can be achieved by the sealing ring and the pressure sealing pad, which effectively prevents the hydraulic oil from leaking out of the inner cavity, and a boosting groove is provided, and the hydraulic oil will enter therein. As the hydraulic oil increases, the pressure applied to the pressure sealing pad will gradually increase, and the tightness of the pressure sealing pad and the outer wall of the telescopic rod will be improved, so as to increase the sealing effect, thus reducing the pressure acting on the sealing ring close to the pressure sealing pad and improving its service life. At the same time, the pressure in the boosting groove changes in real time, which can make the pressure sealing pad expand and contract, and avoid its damage caused by long-term stamping.

[0016] A pressure relief groove is opened between the two sealing rings. When hydraulic pressure passes through the first sealing ring, it will enter the pressure relief groove. Thanks to the opening of the pressure relief groove, the space of the through hole will be increased, so that the hydraulic oil will not generate a large pressure when the pressure relief groove is not filled, thereby alleviating the impact pressure on the outer sealing ring, ensuring the sealing effect, and preventing the hydraulic oil from leaking out. Because the corresponding discharge groove is opened, the hydraulic oil entering the pressure relief groove will flow into the inner cavity along the discharge groove. In this way, the hydraulic oil in the pressure relief groove is always maintained at a low level or even no retention, further improving the overall sealing and the anti-leakage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a three-dimensional exploded structure of a preferred embodiment of the present invention;

[0018] Figure 2 It is a schematic side cross-sectional structural diagram of a preferred embodiment of the present invention;

[0019] Figure 3 It is a preferred embodiment of the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 It is a preferred embodiment of the present invention Figure 2 The enlarged structural diagram at B in the middle;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of a connecting pipe according to a preferred embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of the partial exploded structure of the positioning plate and the rotating rod of a preferred embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram of the partial structure of the fixed ring and the movable ring of a preferred embodiment of the present invention.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. main cylinder body; 2. inner cavity; 3. connecting concave area; 4. threaded teeth; 5. front cover; 6. connecting pipe; 7. fixing ring; 8. rear cover; 9. sealing ring; 10. pressure relief groove; 11. discharge groove; 12. one-way valve plate; 13. two-way valve plate; 14. boosting groove; 15. pressure-bearing sealing gasket; 16. piston; 17. telescopic rod; 18. baffle; 19. slot; 20. sleeve groove; 21. protrusion; 22. groove; 23. rubber pad; 24. serrated top block; 25. movable ring; 26. serration; 27. limiting plate; 28. positioning plate; 29. ​​rotating rod; 30. gear; 31. through hole; 32. limiting ring; 33. rotating groove; 34. movable groove; 35. top block; 36. connecting groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Embodiment 1

[0027] Please refer to Figure 1-2The present invention discloses a hydraulic oil cylinder with anti-leakage function, comprising a main cylinder body 1, an inner cavity 2 is formed through the main cylinder body 1, a piston 16 is movably connected to the inner cavity 2, and a telescopic rod 17 is detachably connected to one side of the piston 16, a front cover 5 and a rear cover 8 are detachably connected to the two ends of the main cylinder body 1, a connecting pipe 6 is fixedly connected to the top side wall of the front cover 5 and the rear cover 8, a through hole for the telescopic rod 17 to move is formed through the middle of the front cover 5, and the front cover 5 and the rear cover 8 have the same structure except for the through hole and the telescopic rod 17;

[0028] A boosting groove 14 is provided on the side wall of the front cover 5 which is opposite to the piston 16 and close to the through hole. The boosting groove 14 is a conical structure. A pressure-bearing sealing gasket 15 is fixedly connected to the side wall at the bottom of the boosting groove 14. The inner wall of the pressure-bearing sealing gasket 15 is tightly fitted on the outer wall of the telescopic rod 17. The boosting groove 14 is communicated with the interior of the inner cavity 2. The pressure-bearing sealing gasket 15 is a circular ring structure. The inner wall where the pressure-bearing sealing gasket 15 and the telescopic rod 17 are fitted is evenly provided with conical grooves.

[0029] The technical effect of this scheme is as follows: when the piston 16 moves, the hydraulic oil will be squeezed, and at this time the hydraulic oil will enter the boosting groove 14, and as the piston 16 moves, the pressure generated by the hydraulic oil in the boosting groove 14 will also increase synchronously, and these pressures will act on the pressure-bearing sealing gasket 15, and as the pressure increases, the pressure-bearing sealing gasket 15 will be driven to fit more closely on the outer wall of the telescopic rod 17, thereby improving the sealing performance of the pressure-bearing sealing gasket 15, and at the same time, conical grooves are opened on the inner wall of the pressure-bearing sealing gasket 15, and these conical grooves expand as the pressure increases, increasing the coverage area of ​​the pressure-bearing sealing gasket 15 and the stability of the fit, further improving the sealing performance of the pressure-bearing sealing gasket 15, and simultaneously improving the anti-leakage function, and at the same time, because the pressure caused by the hydraulic oil in the boosting groove 14 changes in real time, and the movement of the piston 16 is periodic, it is possible to avoid long-term pressure on the pressure-bearing sealing gasket 15, thereby avoiding the problem of fatigue damage of the pressure-bearing sealing gasket 15 caused by long-term pressure shock, thereby improving the service life and stability.

[0030] Embodiment 2

[0031] Please refer to Figure 1-2A pressure relief groove 10 is provided on the side wall of the through hole of the front cover 5, and the pressure relief groove 10 is an annular structure. The front cover 5 is located on the inner wall of the through hole 31 and is detachably inlaid with two sealing rings 9. The inner ring walls of the two sealing rings 9 are tightly fitted on the outer ring wall of the telescopic rod 17. The pressure relief groove 10 is located on the side wall between the two sealing rings 9. A discharge groove 11 is provided on the bottom side wall of the front cover 5 and located at the pressure relief groove 10. The discharge groove 11 is communicated with the inside of the pressure relief groove 10. The discharge groove 11 is a double-stage downward inclined structure, and the slopes at both ends are different. The opening of the discharge groove 11 away from the pressure relief groove 10 is rotatably connected to a two-way valve plate 13 through a one-way rotating torsion spring. The inside of the discharge groove 11 close to the pressure relief groove 10 is rotatably connected to a one-way valve plate 12 through a two-way rotating torsion spring, and the one-way valve plate 12 is an inclined structure. The pressure relief groove 10 is communicated with the inside of the inner cavity 2 through the discharge groove 11.

[0032] The technical effect of this solution is as follows: thanks to the pressure relief groove 10 provided between the two sealing rings 9, when hydraulic pressure enters therein, it will first be filled in the pressure relief groove 10, because the existence of the pressure relief groove 10 increases its space, so that the hydraulic oil will not cause a large pressure on the two sealing rings 9 before filling the pressure relief groove 10, and it can even be said that there is no pressure, so that the sealing ring 9 can be prevented from being damaged or fatigued by pressure shock, and its anti-leakage effect is guaranteed. At the same time, because of the existence of the pressure sealing pad 15, the frequency of the sealing ring 9 being impacted can be reduced, and the stability of the sealing ring 9 can be further improved;

[0033] Because the space of the pressure relief groove 10 is also limited and will be filled up sooner or later, causing pressure on the sealing ring 9, a discharge groove 11 is opened, so that the hydraulic oil entering the pressure relief groove 10 will be discharged along the discharge groove 11 and finally enter the inner cavity 2, ensuring that the space in the pressure relief groove 10 is always sufficient. When the piston 16 moves, the pressure at one end will increase. At this time, the two-way valve plate 13 will be pushed open by the pressure and the hydraulic oil will enter the discharge groove 11. However, thanks to the one-way valve plate 12, the hydraulic oil will not enter the pressure relief groove 10. This can increase a stroke of the hydraulic oil and reduce the pressure on the force-bearing end, thereby reducing the pressure on the remaining components and improving the leakage prevention effect.

[0034] Embodiment 3

[0035] Please refer to Figure 1 , Figure 4A sleeve groove 20 is provided in the middle of the side wall of the end opposite to the main cylinder body 1 of the front cover 5. The front cover 5 is sleeved on the side wall of one end of the main cylinder body 1 through the sleeve groove 20. The outer wall of the end of the main cylinder body 1 close to the front cover 5 is fixedly connected with a threaded tooth 4. The side wall in the sleeve groove 20 and opposite to the threaded tooth 4 is fixedly connected with a threaded groove corresponding thereto. The front cover 5 is detachably threadedly connected to the main cylinder body 1 through the threaded tooth 4 and the threaded groove. A connecting concave area 3 is provided on the inner wall of the end of the inner cavity 2 close to the front cover 5. The connecting concave area 3 is connected to the sleeve groove 2. 0 has the same size as the inner wall of the sleeve groove 20, a protrusion 21 is fixedly connected to the side wall at one end of the sleeve groove 20, a groove 22 is provided on the side wall of the main cylinder body 1 opposite to the protrusion 21, the protrusion 21 is inserted into the groove 22, a layer of rubber pad 23 is fixedly connected to the outer wall of one end of the main cylinder body 1 inserted in the sleeve groove 20, a serrated top block 24 is fixedly connected to the inner wall of the sleeve groove 20 and the end opposite to the connecting concave area 3, the serrated top block 24 is a conical structure and the front end is arc-shaped, and the serrated top block 24 is inserted into the corresponding rubber pad 23.

[0036] The technical effect of this scheme is as follows: the front cover 5 and the rear cover 8 are installed on the two ends of the main cylinder body 1 through the principle of threaded connection. As the front cover 5 is screwed in, the protrusion 21 will also be inserted into the groove 22. A multi-level stepped structure can be formed through the sleeve groove 20 and the connecting recessed area 3. This structure can increase the sealing performance. At the same time, a rubber pad 23 is fixed, which can increase the sealing performance of the connection between the front cover 5 and the main cylinder body 1. At the same time, the protrusion 21 and the groove 22 are set to further improve the sealing performance and increase the stability of the connection between the front cover 5 and the main cylinder body 1. As the serrated top block 24 is screwed in, it will also be inserted into the corresponding rubber pad 23, thereby forming a corrugated structure, forming a stepped sealing function at the very beginning. Through the cooperation of the above functions, the leak-proof function of the connection between the front cover 5 and the main cylinder body 1 can be effectively improved, and the inner ring wall of the front cover 5 and the inner cavity 2 are in the same plane, ensuring the smooth operation of the piston 16.

[0037] Embodiment 4

[0038] Please refer to Figure 1 , Figure 3 A connecting groove 36 is provided inside the front cover 5 and in the side wall opposite to the connecting pipe 6. The connecting pipe 6 is a flexible hollow cylindrical structure. The connecting pipe 6 is connected to the inner cavity 2 through the connecting groove 36. The inner diameter of the connecting groove 36 is different from that of the connecting pipe 6. A baffle 18 is fixedly connected to the inner edge of the connecting groove 36 near the connecting pipe 6. The baffle 18 is a right-angled triangle structure. A slot 19 is provided between the baffle 18 and the inner wall of the connecting pipe 6, and one end of the oil filling pipe is inserted into the slot 19.

[0039] The technical effect of this solution is as follows: as the oil filling pipe is gradually inserted into the connecting pipe 6, one end of the oil filling pipe will be inserted into the slot 19, and the baffle 18 will fit against the inner wall of the oil filling pipe, thereby ensuring smooth oil delivery through the oil filling pipe and ensuring that the oil filling pipe and the inner wall of the connecting groove 36 are in the same plane, thereby avoiding leakage of the hydraulic oil due to reaction force generated by impact during the hydraulic oil delivery process, and also avoiding the above-mentioned problem when the hydraulic oil flows back.

[0040] Embodiment 5

[0041] Please refer to Figure 1 , Figure 5-Figure 7 The outer wall of the connecting tube 6 is fixedly connected with a fixing ring 7 near both ends, one end of the fixing ring 7 is fixedly connected with a movable ring 25, the inner wall of the movable ring 25 is fitted on the outer wall of the connecting tube 6, the outer wall of the connecting tube 6 is fixedly connected with two limiting plates 27, the outer wall of the movable ring 25 near the limiting plate 27 is evenly fixedly connected with saw teeth 26, the limiting plate 27 is provided with an insertion hole near the top, and one end of the movable ring 25 is inserted and connected in the insertion hole, the middle of the outer wall of the connecting tube 6 is fixedly connected with a positioning plate 28, the positioning plate 28 is a triangular structure and the top is a circular structure, the positioning plate 28 A through hole 31 is provided through the top, and a rotating rod 29 is inserted and rotatably connected in the through hole 31. Two annular limit rings 32 are fixedly connected to the inner wall of the through hole 31. A rotating groove 33 is provided on the side wall opposite to the rotating rod 29 and the limit ring 32. The rotating groove 33 is rotatably sleeved on the limit ring 32. Gears 30 are fixedly connected at both ends of the rotating rod 29. The gear 30 is meshed with the sawtooth 26. A moving groove 34 is provided in the middle of the bottom side wall of the movable ring 25. The moving groove 34 is a T-shaped structure. A top block 35 is slidably connected in the moving groove 34. The top block 35 is fixedly connected to the outer wall of one end of the fixed ring 7 through the bottom end.

[0042] Rotating the rotating rod 29 can drive the two gears 30 to rotate at the same time, and drive the movable ring 25 to move and contract through the meshing connection. This will drive the connecting pipe 6 to gradually tighten, so that it is tightly fitted on the oil filling pipe, thereby increasing the stability of the connection. Through the limitation of the top block 35 and the limiting plate 27, the stable movement of the movable ring 25 is guaranteed, thereby ensuring the smoothness of the contraction process and avoiding the problem of leakage of the oil filling pipe due to unstable connection.

[0043] Specifically, when the present invention is used, the oil filling pipe is inserted into the connecting pipe 6. After the insertion is completed, the gear 30 is rotated to drive the movable ring 25 to contract so as to stably clamp the oil filling pipe to ensure the stability of the oil filling pipe connection. Then the hydraulic oil is started to be transported. The hydraulic oil enters the inner cavity 2 to drive the piston 16 to move along the inner cavity 2. Repeated oil filling and oil collection operations are performed through the front cover 5 and the rear cover 8, which can drive the piston 16 and the telescopic rod 17 to perform reciprocating telescopic activities. Because two sealing rings 9 and the pressure sealing gasket 15 are connected in the through hole of the front cover 5, the sealing of the connection can be guaranteed, and the leak-proof effect of the equipment can be guaranteed. In addition, a boosting groove 14 is opened on the front cover 5. When the hydraulic oil enters the boosting groove 14, pressure is applied to the pressure sealing gasket 15, and as the hydraulic oil pressure increases, the pressure on the pressure sealing gasket 15 will also increase. The step is to increase the pressure seal 15 to fit tightly on the outer wall of the telescopic rod 17 under the action of pressure to ensure the sealing performance. The sealing of the pressure seal 15 can reduce the impact of pressure on the sealing ring 9. The pressure relief groove 10 can buffer the hydraulic oil entering the two sealing rings 9 to prevent the hydraulic oil therein from impacting the sealing ring 9 and ensure the sealing performance. The hydraulic oil in the pressure relief groove 10 can be discharged through the established discharge groove 11 to ensure that the space in the pressure relief groove 10 is always sufficient. The one-way valve plate 12 and the two-way valve plate 13 can increase the stroke of the hydraulic oil while preventing it from entering the pressure relief groove 10 and affecting the sealing ring 9. Because the front cover 5 is threadedly connected to one end of the main cylinder body 1, the sealing performance of the connection between the front cover 5 and the main cylinder body 1 can be guaranteed to avoid leakage from the connection.

[0044] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0045] Other parts of the present invention not described in detail belong to the prior art and will not be described in detail here.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic cylinder with anti-leakage function, comprising a main cylinder body (1), characterized in that: The main cylinder body (1) has an inner cavity (2) extending therethrough, a piston (16) being movably connected to the inner cavity (2), and a telescopic rod (17) being detachably connected to one side of the piston (16), and a front cover (5) and a rear cover (8) being detachably connected to the two ends of the main cylinder body (1), respectively, and a connecting pipe (6) being fixedly connected to the top side walls of the front cover (5) and the rear cover (8), and a through hole for the movement of the telescopic rod (17) being provided through the middle of the front cover (5), and the front cover (5) and the rear cover (8) having the same structure except for the through hole and the telescopic rod (17); A pressure boosting groove (14) is provided on the side wall of the front cover (5) opposite to the piston (16) and close to the through hole. The pressure boosting groove (14) is a conical structure. A pressure-bearing sealing gasket (15) is fixedly connected to the bottom side wall of the pressure boosting groove (14). The inner wall of the pressure-bearing sealing gasket (15) is tightly fitted on the outer wall of the telescopic rod (17). The front cover (5) is provided with a pressure relief groove (10) on the side wall of the through hole, and the pressure relief groove (10) is an annular structure.

2. A hydraulic cylinder with anti-leakage function as claimed in claim 1, characterized in that: The pressurizing groove (14) is in communication with the interior of the inner cavity (2); the pressure-bearing sealing pad (15) is of an annular structure; and the inner ring wall where the pressure-bearing sealing pad (15) and the telescopic rod (17) are fitted is evenly provided with conical grooves.

3. A hydraulic cylinder with anti-leakage function as claimed in claim 1, characterized in that: The front cover (5) is located on the inner wall of the through hole (31) and is detachably embedded with two sealing rings (9), the inner ring walls of the two sealing rings (9) are tightly fitted on the outer ring wall of the telescopic rod (17), and the pressure relief groove (10) is located on the side wall between the two sealing rings (9).

4. A hydraulic cylinder with anti-leakage function as claimed in claim 1, characterized in that: A discharge groove (11) is provided in the front cover (5) and at the bottom side wall of the pressure relief groove (10). The discharge groove (11) is communicated with the inside of the pressure relief groove (10). The discharge groove (11) is a double-stage downwardly inclined structure with different slopes at both ends. The opening of the discharge groove (11) away from the pressure relief groove (10) is rotatably connected to a two-way valve plate (13) via a one-way rotating torsion spring. The inside of the discharge groove (11) close to the pressure relief groove (10) is rotatably connected to a one-way valve plate (12) via a two-way rotating torsion spring. The one-way valve plate (12) is an inclined structure. The pressure relief groove (10) is communicated with the inside of the inner cavity (2) via the discharge groove (11).

5. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: A sleeve groove (20) is provided in the middle of the side wall at one end of the front cover (5) opposite to the main cylinder body (1); the front cover (5) is sleeved on the side wall at one end of the main cylinder body (1) through the sleeve groove (20); the outer wall at one end of the main cylinder body (1) close to the front cover (5) is fixedly connected with thread teeth (4); the side wall inside the sleeve groove (20) and opposite to the thread teeth (4) is fixedly connected with a thread groove corresponding to the thread teeth (4); the front cover (5) is detachably threadedly connected to the main cylinder body (1) through the thread teeth (4) and the thread groove.

6. A hydraulic cylinder with anti-leakage function as claimed in claim 1, characterized in that: The inner wall of the inner cavity (2) at one end close to the front cover (5) is provided with a connecting concave area (3), and the connecting concave area (3) has the same size as the inner wall of the sleeve groove (20). A protrusion (21) is fixedly connected to the side wall of one end of the sleeve groove (20). A groove (22) is provided on the side wall of the main cylinder body (1) opposite to the protrusion (21), and the protrusion (21) is inserted into the groove (22). A layer of rubber pad (23) is fixedly connected to the outer wall of the end of the main cylinder body (1) inserted into the sleeve groove (20). A sawtooth top block (24) is fixedly connected to the inner wall of the sleeve groove (20) and at one end opposite to the connecting concave area (3). The sawtooth top block (24) is a conical structure with an arc-shaped front end, and the sawtooth top block (24) is inserted into the corresponding rubber pad (23).

7. The hydraulic cylinder with anti-leakage function as claimed in claim 1, characterized in that: A connecting groove (36) is provided inside the front cover (5) and in the side wall opposite to the connecting pipe (6); the connecting pipe (6) is a flexible hollow cylindrical structure; the connecting pipe (6) is connected to the interior of the inner cavity (2) through the connecting groove (36); the inner diameter of the connecting groove (36) and the connecting pipe (6) are different; a baffle (18) is fixedly connected to the inner edge of the connecting pipe (6) near the connecting groove (36); the baffle (18) is a right-angled triangle-like structure; a slot (19) is provided between the baffle (18) and the inner wall of the connecting pipe (6), and one end of the oil filling pipe is inserted into the slot (19).

8. The hydraulic cylinder with anti-leakage function as claimed in claim 1, characterized in that: A fixed ring (7) is fixedly connected to the outer wall of the connecting tube (6) near both ends, one end of the fixed ring (7) is fixedly connected to a movable ring (25), the inner ring wall of the movable ring (25) is fitted on the outer wall of the connecting tube (6), the outer ring wall of the connecting tube (6) is fixedly connected to two limiting plates (27), the outer wall of the movable ring (25) near one end of the limiting plate (27) is evenly fixedly connected with saw teeth (26), the limiting plate (27) is provided with an insertion hole near the top, and one end of the movable ring (25) is inserted and connected in the insertion hole.

9. The hydraulic cylinder with anti-leakage function according to claim 1, characterized in that: A positioning plate (28) is fixedly connected to the middle of the outer wall of the connecting tube (6). The positioning plate (28) is a triangular structure with a circular top. A through hole (31) is provided at the top of the positioning plate (28). A rotating rod (29) is inserted and rotatably connected in the through hole (31). Two annular limiting rings (32) are fixedly connected to the inner wall of the through hole (31). A rotating groove (33) is provided on the side wall of the rotating rod (29) opposite to the limiting ring (32). The rotating groove (33) is rotatably sleeved on the limiting ring (32). Gears (30) are fixedly connected to both ends of the rotating rod (29). The gears (30) are meshingly connected with the saw teeth (26).

10. The hydraulic cylinder with anti-leakage function according to claim 8, characterized in that: A moving groove (34) is provided in the middle of the bottom side wall of the movable ring (25). The moving groove (34) is a T-shaped structure. A top block (35) is slidably connected in the moving groove (34). The top block (35) is fixedly connected to the outer wall of one end of the fixed ring (7) through the bottom end.

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