Hydraulic oil cylinder with oil leakage prevention mechanism

Abstract

The hydraulic oil cylinder with the oil leakage prevention mechanism comprises a cylinder body, an end cover, a piston rod and a piston, the cylinder body is provided with an oil pipe communicated with the interior of the cylinder body, one end of the cylinder body is provided with a flange plate, the end cover is connected with the flange plate through a bolt and a nut, and the piston is arranged on the inner wall of the cylinder body in a sliding mode. One end of the piston rod is arranged on the piston, the other end of the piston rod penetrates through the cylinder body and the end cover and extends to the outside, the oil pipe is further provided with a filtering assembly, the filtering assembly comprises a connecting sleeve, a filtering net and a pressing and holding sealing sleeve, internal threads are arranged on the inner wall and the outer wall of the oil pipe, and external threads are arranged on the outer portion of the connecting sleeve. The connecting sleeve is connected with the interior of the oil pipe through threads, and a limiting ring is arranged at one end of the connecting sleeve and makes contact with the end of the oil pipe. The utility model relates to the technical field of hydraulic oil cylinders, and particularly provides a hydraulic oil cylinder with an oil leakage prevention mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with an anti-oil leakage mechanism. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion or swinging motion. It is widely used in the hydraulic systems of various machines. The hydraulic cylinder mainly includes a cylinder barrel, a cylinder head, a piston, a piston rod and other parts.

[0003] The existing hydraulic cylinders are not well protected against oil leakage. During daily use, there is a lack of filtering measures for the hydraulic oil. Impurities in the oil are easily accumulated in the cylinder, causing wear and damage to the inner wall of the cylinder and the piston. In addition, when the piston has a large force, it has a greater impact on the end cover, accelerating the wear of the seal and easily causing oil leakage, thereby affecting the normal use of the hydraulic cylinder. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the hydraulic cylinder lacks filtering measures for the hydraulic oil, and impurities in the oil enter the cylinder barrel and wear and damage the inner wall of the cylinder barrel and the piston. At the same time, when the impact force of the piston is large, it affects the sealing of the end cover, accelerates the wear of the seal, and easily causes oil leakage.

[0005] The utility model provides the following technical solutions: the utility model proposes a hydraulic oil cylinder with an anti-oil leakage mechanism, comprising a cylinder body, an end cover, a piston rod and a piston, the cylinder body is provided with an oil pipe connected with the inside of the cylinder body, one end of the cylinder body is provided with a flange, the end cover and the flange are connected with bolts and nuts, the piston is slidably arranged on the inner wall of the cylinder body, one end of the piston rod is arranged on the piston, the other end of the piston rod penetrates the cylinder body and the end cover and extends to the outside, and the oil pipe is also provided with a filter assembly.

[0006] Furthermore, the filter assembly includes a connecting sleeve, a filter screen and a pressure-holding sealing sleeve. The inner wall and the outer wall of the oil pipe are both provided with internal threads, the outside of the connecting sleeve is provided with external threads, the connecting sleeve is connected to the inside of the oil pipe through threads, one end of the connecting sleeve is provided with a limit ring, the limit ring is in contact with the end of the oil pipe, the filter screen is provided on the other end of the connecting sleeve, and the pressure-holding sealing sleeve is connected to the outer wall of the oil pipe through threads.

[0007] Preferably, a sealing ring is provided at one end of the limiting ring, and an annular groove corresponding to the sealing ring is provided on the end surface of the oil pipe.

[0008] Preferably, a pressing and sealing ring is provided on one end of the pressing and sealing sleeve, and the pressing and sealing ring is in close contact with the limiting ring and seals.

[0009] Furthermore, a support ring is provided on the inner side of the end cover, and a buffer sealing rubber pad is provided on the support ring.

[0010] Furthermore, a sealing dustproof ring is provided on the outer side of the end cover.

[0011] The utility model proposes a hydraulic cylinder with an anti-leakage mechanism, and the beneficial effects achieved by adopting the above structure are as follows:

[0012] (1) The hydraulic oil entering the cylinder can be filtered through the connecting sleeve, filter screen and pressure-holding sealing sleeve, effectively reducing the impurities in the hydraulic oil from entering the cylinder and accelerating the damage to the cylinder and piston. The detachable design facilitates disassembly, maintenance and cleaning.

[0013] (2) The support ring and buffer sealing rubber pad arranged on the end cover reduce the hard impact of the piston on the end cover, and the sealing dust ring arranged at the same time prevents external dust from entering the cylinder body through the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 The overall structure of a hydraulic cylinder with an anti-leakage mechanism proposed by the utility model is schematically shown. Figure 1 ;

[0016] Figure 2 The overall structure of a hydraulic cylinder with an anti-leakage mechanism proposed by the utility model is schematically shown. Figure 2 ;

[0017] Figure 3 for Figure 1 A partial enlarged schematic diagram of part A;

[0018] Figure 4 for Figure 2 A partial enlarged schematic diagram of part B;

[0019] Figure 5 The utility model is a schematic diagram of the internal structure of a hydraulic cylinder with an anti-oil leakage mechanism.

[0020] Among them, 1. cylinder body, 2. end cover, 3. piston rod, 4. piston, 5. oil pipe, 6. flange, 7. filter assembly, 8. connecting sleeve, 9. filter screen, 10. pressure-holding sealing sleeve, 11. limit ring, 12. sealing ring, 13. annular groove, 14. pressure-holding sealing ring, 15. support ring, 16. buffer sealing pad, 17. sealing dust ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0023] like Figures 1 to 5 As shown, the technical solution adopted by the utility model is as follows: a hydraulic cylinder with an anti-oil leakage mechanism, comprising a cylinder body 1, an end cover 2, a piston rod 3 and a piston 4, an oil pipe 5 connected to the inside of the cylinder body 1 is provided on the cylinder body 1, a flange 6 is provided at one end of the cylinder body 1, the end cover 2 and the flange 6 are connected by bolts and nuts, the piston 4 is slidably arranged on the inner wall of the cylinder body 1, one end of the piston rod 3 is arranged on the piston 4, the other end of the piston rod 3 passes through the cylinder body 1 and the end cover 2 and extends to the outside, a filter assembly 7 is also provided on the oil pipe 5, a support ring 15 is provided on the inner side of the end cover 2, a buffer sealing rubber pad 16 is provided on the support ring 15, and a sealing dust ring 17 is also provided on the outer side of the end cover 2.

[0024] like Figure 3 and Figure 4 As shown, the filter assembly 7 includes a connecting sleeve 8, a filter screen 9 and a pressing and sealing sleeve 10. The inner wall and the outer wall of the oil pipe 5 are both provided with internal threads, the outer part of the connecting sleeve 8 is provided with external threads, the connecting sleeve 8 is connected to the inside of the oil pipe 5 through threads, one end of the connecting sleeve 8 is provided with a limiting ring 11, the limiting ring 11 is in contact with the end of the oil pipe 5, the filter screen 9 is arranged on the other end of the connecting sleeve 8, the pressing and sealing sleeve 10 is connected to the outer wall of the oil pipe 5 through threads, one end of the limiting ring 11 is provided with a sealing ring 12, the end face of the oil pipe 5 is provided with an annular groove 13 corresponding to the sealing ring 12, and one end of the pressing and sealing sleeve 10 is provided with a pressing and sealing ring 14, which is in close contact and sealed with the limiting ring 11.

[0025] During specific use, the connecting sleeve 8 and the oil pipe 5 are fastened by threads, so that the filter screen 9 enters the interior of the oil pipe 5, and the sealing ring 12 slides into the annular groove 13 to increase the connection sealing, and then the pressing and holding sealing sleeve 10 is connected to the outer wall of the oil pipe 5 by threads. At this time, the limiting ring 11 is tightly contacted and sealed by the pressing and holding sealing ring 14. During use, the impact of the piston 4 is buffered by the buffer sealing pad 16 to reduce the hard impact on the end cover 2.

[0026] 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", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, material or apparatus 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, material or apparatus.

[0027] 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. A hydraulic cylinder with an anti-leakage mechanism, comprising a cylinder body, an end cover, a piston rod and a piston, wherein the cylinder body is provided with an oil pipe connected to the inside of the cylinder body, characterized in that: A flange is provided at one end of the cylinder body, and the end cover is connected to the flange by bolts and nuts. The piston is slidably arranged on the inner wall of the cylinder body, and one end of the piston rod is arranged on the piston. The other end of the piston rod penetrates the cylinder body and the end cover and extends to the outside. A filter assembly is also provided on the oil pipe; The filter assembly includes a connecting sleeve, a filter screen and a pressure-holding sealing sleeve. The inner wall and the outer wall of the oil pipe are both provided with internal threads. The outside of the connecting sleeve is provided with external threads. The connecting sleeve is connected to the inside of the oil pipe through threads. One end of the connecting sleeve is provided with a limit ring. The limit ring contacts the end of the oil pipe. The filter screen is provided on the other end of the connecting sleeve. The pressure-holding sealing sleeve is connected to the outer wall of the oil pipe through threads.

2. A hydraulic cylinder with an anti-oil leakage mechanism according to claim 1, characterized in that: A sealing ring is arranged at one end of the limiting ring, and an annular groove corresponding to the sealing ring is arranged on the end surface of the oil pipe.

3. A hydraulic cylinder with an anti-oil leakage mechanism according to claim 2, characterized in that: A pressing and sealing ring is arranged on one end of the pressing and sealing sleeve.

4. A hydraulic cylinder with an anti-oil leakage mechanism according to claim 3, characterized in that: A support ring is provided on the inner side of the end cover, and a buffer sealing rubber pad is provided on the support ring.

5. The hydraulic cylinder with an anti-oil leakage mechanism according to claim 4, characterized in that: A sealing dustproof ring is also provided on the outer side of the end cover.

Images