Sealing ring for piston rod

Abstract

The utility model relates to a sealing ring for a piston rod in the technical field of sealing rings, a clamping groove for clamping a sealing device is formed in a sealing ring body, and second sealing blocks for sealing the piston rod are arranged at the upper end and the lower end of an oil storage groove; the sealing device comprises a clamping ball clamped in the clamping groove and used for fixing the sealing device, and a sealing gasket used for assisting the sealing ring body in sealing the piston rod is fixedly installed at the end, away from the clamping groove, of the clamping ball. Therefore, when the sealing ring body is installed on the piston rod, the sealing ring body can be arranged on the piston rod in a sleeving mode, then the clamping connection ball is clamped into the clamping connection groove, the sealing gasket is made to be tightly attached to the top end of the sealing ring body, meanwhile, under clamping connection between the clamping connection ball and the clamping connection groove, the two second sealing blocks are made to be tightly attached to the piston rod, and low-pressure sealing can be achieved; and meanwhile, the overall extrusion resistance of the piston rod seal is improved, so that leakage of hydraulic oil is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, in particular to a sealing ring for a piston rod. Background Art

[0002] The piston rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements. For example, as shown in a combined sealing ring used in conjunction with a piston rod with Chinese patent application number CN202321239818.X, by setting up two independent sealing ring structures - a first sealing ring body and a second sealing ring body, the second sealing ring body can be assembled and applied independently, and can also be combined and connected, that is, the combination of the combined convex insert ring and the combined plug-in alignment ring set on the top of the first sealing ring body and the combined buckle sleeve groove can be plugged in to complete the combination, even if the first sealing ring body and the second sealing ring body are stacked and combined for application, the effect of facilitating the combined adjustment of the thickening or shrinking of the sealing ring is achieved.

[0003] However, most of the existing piston rod sealing rings adopt a single-hole sealing structure. Due to the long-term movement of the piston rod, the seal inside the piston rod is not tight, which reduces the working efficiency of the piston rod. Utility Model Content

[0004] In order to solve the problem that most of the existing piston rod sealing rings proposed in the above background technology adopt a single-hole sealing structure, and the piston rod moves for a long time, resulting in loose sealing inside the piston rod, which reduces the working efficiency of the piston rod, the utility model provides the following technical solutions:

[0005] A sealing ring for a piston rod comprises a sealing ring body for sealing the piston rod. The sealing ring body is made of a polytetrafluoroethylene bronze composite material, has good low-temperature elasticity and very good wear resistance, and has stronger mechanical strength than nitrile rubber, so that the piston rod seal as a whole has stronger high-pressure resistance. The upper and lower ends of the sealing ring body are provided with sealing devices for clamping in the sealing ring body to assist the sealing ring body in sealing the piston rod.

[0006] The sealing ring body is provided with a clamping groove for clamping the sealing device, and there are two clamping grooves, which are symmetrically distributed in the sealing ring body in the upper and lower directions, so that the sealing device can be clamped in the clamping groove by using the sealing ring body made of polytetrafluoroethylene bronze composite material, and the sealing device can be closely attached to the upper and lower ends of the sealing ring body.

[0007] The sealing device includes a clamping ball clamped in the clamping groove for fixing the sealing device, and the clamping ball is made of nitrile rubber material, has very good low-temperature elasticity, and has good wear resistance, which can ensure a good sealing effect under low-temperature and low-pressure working conditions; and the clamping ball is clamped in the clamping groove, so that the two sealing blocks on the sealing ring body are tightly attached to the piston rod in two directions and sealed to prevent the piston rod from leaking hydraulic oil when in use.

[0008] Furthermore, an oil storage groove is provided on the inner side of the sealing ring body for assisting the sealing ring body in sealing the piston rod, and the cross section of the oil storage groove is square to facilitate the normal use of the piston rod.

[0009] Furthermore, sealing blocks 2 for sealing the piston rod are provided at the upper and lower ends of the oil storage tank. The sealing blocks 2 can not only prevent dirt and water mist from invading the piston rod, but also scrape off dirt on the piston rod and relieve the pressure on the sealing ring body.

[0010] Furthermore, a sealing block 1 is arranged on the outside of the sealing ring body, and there are two sealing blocks 1, which are symmetrically distributed on the outside of the sealing ring body in an upper and lower manner, and the piston rod can be further sealed by utilizing the cooperation between the two sealing blocks 1 and the guide sleeve.

[0011] Furthermore, a sealing gasket is fixedly installed on the end of the clamping ball away from the clamping groove to assist the sealing ring body in sealing the piston rod. The sealing gasket is made of hard engineering plastic and has very high compressive strength and modulus. Under high pressure, it can prevent the material of the sealing ring body from squeezing into the fitting gap, causing the piston rod seal to be slowly destroyed during use.

[0012] Furthermore, a sealing block three for sealing the piston rod is arranged on the inner side of the sealing gasket.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By providing the clamping groove, the second sealing block and the sealing device, when the sealing ring body is installed on the piston rod, the sealing ring body can be sleeved on the piston rod, and then the clamping ball can be clamped into the clamping groove, so that the sealing gasket is tightly attached to the top of the sealing ring body. At the same time, under the clamping connection between the clamping ball and the clamping groove, the two sealing blocks are tightly attached to the piston rod, so that low-pressure sealing can be achieved, and at the same time, the overall extrusion resistance of the piston rod seal is improved to prevent leakage of hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the sealing ring body of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the sealing device of the utility model;

[0020] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle.

[0021] In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

[0022] 100-seal ring body, 101-oil storage tank, 102-clamping groove, 103-seal block 1, 104-seal block 2;

[0023] 200 - sealing device, 201 - sealing pad, 202 - sealing block three, 203 - catch ball. DETAILED DESCRIPTION

[0024] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part 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.

[0025] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0026] See also Figure 1-Figure 4 , the utility model provides a sealing ring for a piston rod.

[0027] The sealing ring body 100 is provided with sealing devices 200 at the upper and lower ends thereof for clamping in the sealing ring body 100 to assist the sealing ring body 100 in sealing the piston rod.

[0028] The sealing ring body 100 is made of a polytetrafluoroethylene bronze composite material, which has good low-temperature elasticity and very good wear resistance. At the same time, the mechanical strength is stronger than that of nitrile rubber, so that the piston rod seal as a whole has stronger high-pressure resistance.

[0029] A snap-in groove 102 for snapping the sealing device 200 is provided inside the sealing ring body 100, and there are two snap-in grooves 102, which are symmetrically distributed in the sealing ring body 100 in the upper and lower directions, so that the sealing device 200 can be snap-into the snap-in groove 102 by using the sealing ring body 100 made of polytetrafluoroethylene bronze composite material, and the sealing device 200 can be tightly attached to the upper and lower ends of the sealing ring body 100.

[0030] An oil storage tank 101 is provided on the inner side of the sealing ring body 100 for assisting the sealing ring body 100 in sealing the piston rod, and the cross-section of the oil storage tank 101 is square to facilitate the normal use of the piston rod; sealing blocks 104 for sealing the piston rod are provided at the upper and lower ends of the oil storage tank 101, and the sealing blocks 104 can not only prevent dirt and water mist from invading the piston rod, but also scrape off the dirt on the piston rod and relieve the pressure on the sealing ring body 100.

[0031] A sealing block 103 is arranged on the outside of the sealing ring body 100, and there are two sealing blocks 103, which are symmetrically distributed on the outside of the sealing ring body 100, and the piston rod can be further sealed by the cooperation between the two sealing blocks 103 and the guide sleeve.

[0032] The sealing device 200 includes a clamping ball 203 clamped in the clamping groove 102 for fixing the sealing device 200, and the clamping ball 203 is made of nitrile rubber material, has very good low-temperature elasticity, and has good wear resistance, which can ensure a good sealing effect under low temperature and low pressure conditions; and by clamping the clamping ball 203 in the clamping groove 102, the two sealing blocks 104 on the sealing ring body 100 will be tightly attached to the piston rod and seal it to prevent the piston rod from leaking hydraulic oil when in use.

[0033] The end of the clamping ball 203 away from the clamping groove 102 is fixedly installed with a sealing gasket 201 for assisting the sealing ring body 100 to seal the piston rod. The sealing gasket 201 is made of hard engineering plastic and has very high compressive strength and modulus. It can prevent the material of the sealing ring body 100 from squeezing into the fitting gap under high pressure, causing the piston rod seal to be slowly destroyed during use; the inner side of the sealing gasket 201 is provided with a sealing block three 202 for sealing the piston rod; so that when the sealing ring body 100 is installed on the piston rod, the sealing ring body 100 can be sleeved on the piston rod, and then the clamping ball 203 is clamped into the clamping groove 102, so that the sealing gasket 201 is tightly attached to the top of the sealing ring body 100, and at the same time, under the clamping connection between the clamping ball 203 and the clamping groove 102, the two sealing blocks 2 104 are tightly attached to the piston rod, so that low-pressure sealing can be achieved, thereby improving the overall extrusion resistance of the piston rod seal.

[0034] Based on the above content and the accompanying drawings, those skilled in the art can understand and implement the utility model. In addition, any non-creative modifications made to the utility model by those skilled in the art without making creative work still fall within the protection scope of the utility model.

Claims

1. A sealing ring for a piston rod, characterized in that: It comprises a sealing ring body (100) for sealing a piston rod, wherein the upper and lower ends of the sealing ring body (100) are provided with sealing devices (200) for clamping in the sealing ring body (100) to assist the sealing ring body (100) in sealing the piston rod; The sealing ring body (100) is provided with a clamping groove (102) for clamping the sealing device (200), and there are two clamping grooves (102), which are symmetrically distributed in the sealing ring body (100) in an upper and lower manner; The sealing device (200) comprises a clamping ball (203) clamped in the clamping groove (102) for fixing the sealing device (200).

2. A sealing ring for a piston rod according to claim 1, characterized in that: An oil storage tank (101) is provided on the inner side of the sealing ring body (100) for assisting the sealing ring body (100) in sealing the piston rod.

3. A piston rod sealing ring according to claim 2, characterized in that: Sealing blocks 2 (104) for sealing the piston rod are arranged at the upper and lower ends of the oil storage tank (101).

4. A sealing ring for a piston rod according to claim 3, characterized in that: A sealing block 1 (103) is arranged on the outer side of the sealing ring body (100), and there are two sealing blocks 1 (103). The two sealing blocks 1 (103) are symmetrically distributed on the outer side of the sealing ring body (100) in an upper and lower manner.

5. A sealing ring for a piston rod according to claim 1, characterized in that: A sealing pad (201) is fixedly mounted on one end of the clamping ball (203) away from the clamping groove (102) and is used to assist the sealing ring body (100) in sealing the piston rod.

6. A sealing ring for a piston rod according to claim 5, characterized in that: A sealing block three (202) for sealing the piston rod is arranged on the inner side of the sealing pad (201).

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