Oil cylinder piston and energy-saving hydraulic station with same

Abstract

The utility model provides an oil cylinder piston and an energy-saving type hydraulic station with the oil cylinder piston. The oil cylinder piston comprises an oil piston body, a piston rod and a piston rod, wherein sealing installation grooves are formed in the two ends of the oil plug body, V-shaped oil seal rings are arranged in the sealing installation grooves, and V-shaped openings of the two V-shaped oil seal rings in the two sealing installation grooves are arranged in a back-to-back mode. The two V-shaped oil seal rings with the openings opposite to each other are arranged at the two ends of the oil plug body for oil sealing, so that the oil cylinder piston effectively seals and separates the cavities on the two sides of the oil cylinder, flowing of hydraulic oil between the cavities on the two sides is avoided, movement of the oil cylinder piston is ensured, hydraulic pressure can be accurately output, and the service life of the oil cylinder is prolonged. And accurate execution is carried out through hydraulic pressure.

Description

Technical Field

[0001] The utility model relates to a hydraulic station, in particular to an oil cylinder piston with good sealing performance and an energy-saving hydraulic station with the oil cylinder piston. Background Art

[0002] A hydraulic station is a hydraulic device that supplies oil according to the required flow direction, pressure and flow rate, and is usually used in conjunction with machine tools that require hydraulically driven actuators.

[0003] Chinese utility model patent specification CN219081986U discloses an energy-saving hydraulic station, such as Figure 1 As shown, it includes: an oil tank 1', a gas-liquid booster pump and an electromagnetic valve group 6'; the liquid outlet of the oil tank 1' is connected to the liquid inlet of the gas-liquid booster pump; the liquid outlet of the gas-liquid booster pump is connected to the liquid inlet of the electromagnetic valve group 6'; the liquid return port of the electromagnetic valve group 6' is connected to the liquid inlet of the oil tank 1'; the gas-liquid booster pump includes: a pneumatic cylinder 10' and an oil cylinder 11'; the pneumatic cylinder 10' and the oil cylinder 11' are connected; a pneumatic piston in contact with the inner wall is provided in the pneumatic cylinder 10', and an oil cylinder piston in contact with the inner wall is provided in the oil cylinder 11'; the piston area of ​​the pneumatic piston is larger than the piston area of ​​the oil cylinder piston; it also includes an air supply device, including: an air source, a first air control valve 27', a second air control valve 28' and an air control reversing valve 29'; the first A pneumatic control valve 27' is arranged on one side of the pneumatic cylinder 10, and the second pneumatic control valve 28 is arranged on the other side of the pneumatic cylinder 10'; the air source is connected to the air inlets of the first pneumatic control valve 27', the second pneumatic control valve 28' and the pneumatic control reversing valve 29' respectively; the pneumatic control reversing valve 28' comprises: an A' outlet and a B' outlet; the A' outlet is connected to one side of the pneumatic cylinder 10', and the B' outlet is connected to the other side of the pneumatic cylinder 10'; the first pneumatic control valve 27' is connected to the pneumatic control reversing valve 29' through the first air source circuit 30' to control the pneumatic control reversing valve 29' to start the A' outlet; the second pneumatic control valve 28' is connected to the pneumatic control reversing valve 29' through the second air source circuit 31' to control the pneumatic control reversing valve 29' to start the B' outlet.

[0004] In the factory environment, the above energy-saving hydraulic station is generally used to cooperate with the cylinder barrel of the cylinder, and the cylinder barrel is filled with oil, and the cylinder piston is driven to reciprocate by the pneumatic piston. Since the cylinder piston needs to be installed in the cylinder barrel to seal the oil, the sealing performance between the cylinder piston and the cylinder barrel is very high. However, the sealing of the cylinder piston in the above energy-saving hydraulic station is insufficient, especially with the wear of the cylinder piston during use, resulting in insufficient sealing between the cylinder cavities on both sides of the cylinder piston, resulting in the cylinder being unable to accurately output hydraulic pressure, the tooling losing pressure, resulting in the workpiece not being clamped tightly, and the tool hitting and other problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an oil cylinder piston with good sealing performance and an energy-saving hydraulic station with the oil cylinder piston.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] On the one hand, the utility model proposes an oil cylinder piston, which includes: an oil plug body; wherein, sealing installation grooves are opened at both ends of the oil plug body, and a V-shaped oil sealing ring is arranged in each of the sealing installation grooves, and the V-shaped openings of the two V-shaped oil sealing rings in the two sealing installation grooves are arranged back to back for oil sealing.

[0008] Furthermore, the above-mentioned oil cylinder piston also includes: two piston end covers; wherein the sealing mounting groove is a notch structure with openings on both sides and is arranged along the entire circumference of the oil plug body, so that the side wall of the sealing mounting groove serves as a limiting step surface; the two piston end covers are respectively arranged at both ends of the oil plug body, for clamping the V-shaped oil sealing ring, so that the V-shaped oil sealing ring is limitedly clamped between the limiting step surface of the sealing mounting groove and the piston end covers.

[0009] Furthermore, in the above-mentioned oil cylinder piston, the piston end cover is provided with a fixing groove matched with the bottom wall of the sealing installation groove, which is used for fixing on the bottom wall of the sealing installation groove.

[0010] Furthermore, in the above-mentioned oil cylinder piston, the sealing installation groove is a U-shaped structure and is arranged along the entire circumference of the oil plug body, so that the V-shaped oil seal ring can be clamped in the sealing installation groove.

[0011] Furthermore, in the above-mentioned cylinder piston, one end of the V-shaped oil seal ring is provided with a V-shaped opening, and the two ends of the V-shaped opening are provided with support portions extending toward the outside of the V-shaped opening along the thickness direction of the V-shaped oil seal ring for abutting against the piston end cover and the inner wall of the cylinder barrel.

[0012] Furthermore, in the above-mentioned cylinder piston, an elastic member is provided at the V-shaped opening of the V-shaped oil seal ring, which is used to deform the sealing support bodies on both sides of the V-shaped opening and apply a reset force to the sealing support bodies when the sealing support bodies are deformed by extrusion, so that the sealing support bodies can be reset.

[0013] Furthermore, in the above-mentioned oil cylinder piston, the elastic member is a V-shaped structure, and is arranged along the inner wall of the V-shaped opening.

[0014] Furthermore, in the above-mentioned oil cylinder piston, the V-shaped oil seal ring is provided with a V-shaped groove along the inner wall of the V-shaped opening, and the elastic member is a V-shaped structure and is arranged in the V-shaped groove.

[0015] Furthermore, in the above-mentioned oil cylinder piston, a mounting hole is provided on the oil plug body for mounting the piston rod.

[0016] On the other hand, the utility model proposes an energy-saving hydraulic station, which includes: a gas-liquid booster pump and a control valve group for controlling the reversal of the gas-liquid booster pump; the gas-liquid booster pump includes a linked air cylinder and an oil cylinder; the oil cylinder has the above-mentioned cylinder piston in the cylinder barrel of the oil cylinder.

[0017] The utility model provides an oil cylinder piston and an energy-saving hydraulic station with the oil cylinder piston. Two V-shaped oil sealing rings with openings facing each other are arranged at the two ends of the oil plug body, and the two V-shaped oil sealing rings are limited and clamped by two piston end covers arranged at the two sides of the oil plug body, so that the two V-shaped oil sealing rings are respectively clamped on the two ends of the oil plug body, and oil is sealed by the V-shaped oil sealing rings, thereby ensuring that the oil cylinder piston effectively seals and separates the cavities on both sides of the oil cylinder, avoiding the flow of hydraulic oil between the cavities on both sides, thereby ensuring the movement of the oil cylinder piston, and accurately outputting hydraulic pressure, and then accurately executing through hydraulic pressure, such as clamping a workpiece, which can avoid the problems of the workpiece not being clamped tightly, hitting the tool, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of an energy-saving hydraulic station in the prior art;

[0020] Figure 2 A schematic diagram of the structure between the oil cylinder and the air cylinder in the energy-saving hydraulic station provided by the first embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the structure of the oil cylinder piston provided in the first embodiment of the utility model;

[0022] Figure 4 A schematic cross-sectional view of a V-shaped oil seal ring provided in the first embodiment of the utility model;

[0023] Figure 5 A schematic cross-sectional view of a V-shaped oil seal ring provided with an elastic member provided in the first embodiment of the utility model;

[0024] Figure 6 Another cross-sectional schematic diagram of a V-shaped oil seal ring provided with an elastic member provided in the first embodiment of the utility model;

[0025] Figure 7 A schematic diagram of the structure between the oil cylinder and the air cylinder in the energy-saving hydraulic station provided by the second embodiment of the utility model;

[0026] Figure 8 A schematic cross-sectional view of a V-shaped oil seal ring provided with an elastic member provided in a second embodiment of the utility model;

[0027] Fig. 9 A schematic cross-sectional view of a V-shaped oil seal ring provided with an elastic member provided in a third embodiment of the utility model;

[0028] Description of reference numerals:

[0029] 1'-oil tank, 5'-filter, 6'-solenoid valve group, 7'-solenoid valve seat, 8'-output inlet and return oil pipes, 9'-muffler, 10'-pneumatic cylinder, 11'-oil cylinder, 26'-air source, 27'-first air control valve, 28'-second air control valve, 29'-air control reversing valve, 30'-first air source circuit, 31'-second air source circuit, 33'-return oil pipeline;

[0030] 1-oil cylinder, 11-oil cylinder piston, 111-oil plug body, 1111-seal mounting groove, 1112-support guide groove, 112-piston end cover, 1121-fixing groove, 113-V-type oil seal ring, 1131-V-type opening, 1132-support part, 1133-V-type clamping groove, 114-elastic part, 115-mounting hole, 2-cylinder, 21-cylinder piston, 3-piston rod. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] First embodiment:

[0033] See also Figure 2 , which is a schematic diagram of the structure of the energy-saving hydraulic station provided by the first embodiment of the utility model. As shown in the figure, the gas-liquid booster pump of the energy-saving hydraulic station includes a linked oil cylinder 1 and a cylinder 2. The cylinder 2 is provided with a cylinder piston 21 in contact with the inner wall, and the oil cylinder 1 is provided with an oil cylinder piston 11 in contact with the inner wall. The cylinder piston 21 and the oil cylinder piston 11 are connected by a piston rod 3 to achieve linkage between the two.

[0034] Specifically, the ends of the cylinder 2 and the oil cylinder 1 are provided with through holes, and the oil cylinder 1 and the cylinder 2 are connected through the through holes; the piston rod 3 passes through the through holes in a sealed sliding connection, and the two ends of the piston rod 3 are respectively fixedly connected to the oil cylinder piston 11 and the cylinder piston 21. In this embodiment, the two ends of the piston rod 3 are respectively penetrated through the oil cylinder piston 11 and the cylinder piston 21, and are connected and fixed on the oil cylinder piston 11 and the cylinder piston 21 through connecting parts such as nuts. In this embodiment, the gas-liquid booster pump is a single oil cylinder, and can also be a double oil cylinder, which is not limited in this embodiment. In this embodiment, the piston area of ​​the cylinder piston 21 is larger than the piston area of ​​the oil cylinder piston 11, especially the piston area of ​​the cylinder piston 21 can be multiple times larger than the piston area of ​​the oil cylinder piston 11, so as to facilitate the calculation of pressure. For example, the piston area of ​​the cylinder piston 21 is 6 times the piston area of ​​the oil cylinder piston 11, then the cylinder 2 outputs a pressure of 1 bar, and the oil cylinder 1 outputs a pressure of 6 bar.

[0035] See also Figure 3 , which is a schematic diagram of the structure of the oil cylinder piston provided by the first embodiment of the utility model. As shown in the figure, the oil cylinder piston 11 includes: an oil plug body 111 and two piston end covers 112; wherein,

[0036] Both ends of the oil plug body 111 (such as Figure 3 The left and right ends of the two sealing installation grooves 1111 are provided with sealing installation grooves 1111, each sealing installation groove 1111 is provided with a V-shaped oil seal ring 113, and the V-shaped openings 1131 of the two V-shaped oil seal rings 113 in the two sealing installation grooves 1111 are arranged opposite to each other (as shown in FIG. Figure 3 As shown, the V-shaped opening 1131 of the left V-shaped oil seal ring 113 is arranged to open to the left, and the V-shaped opening 1131 of the right V-shaped oil seal ring 113 is arranged to open to the right), for oil sealing.

[0037] Specifically, both left and right ends of the oil plug body 111 can be provided with sealing installation grooves 1111, which are notch structures with openings on both sides and are arranged along the entire circumference of the oil plug body 111, so that the oil plug body 111 forms a three-section structure, that is, the outer diameters of the two side sections are smaller than the outer diameter of the middle section, forming a two-side installation clamping step structure, that is, the side walls of the sealing installation groove serve as the limiting step surface of the V-shaped oil seal ring 113. The two V-shaped oil seal rings 113 can be installed in the two sealing installation grooves 1111 from both ends, respectively, and the two V-shaped oil seal rings 113 are installed in opposite directions, that is, the V-shaped openings 1131 of the two V-shaped oil seal rings 113 are arranged opposite to each other, that is, the V-shaped opening 1131 of the left V-shaped oil seal ring 113 is arranged to open to the left, and the V-shaped opening 1131 of the right V-shaped oil seal ring 113 is arranged to open to the right, so as to seal the hydraulic oil on both sides of the oil plug body 111 respectively. In this embodiment, the outer diameter of the V-shaped oil seal ring 113 in a free state is greater than the outer diameter of the oil plug body 111 .

[0038] Continue to see Figure 3 The two piston end covers 112 are respectively arranged at the two ends of the oil plug body 111 (such as Figure 3 The left and right ends shown in the figure are used to clamp the V-shaped oil seal ring 113 so that the V-shaped oil seal ring 113 is limited and clamped between the side wall of the sealing installation groove 1111, that is, the limiting step surface of the V-shaped oil seal ring 113 and the piston end cover 112, which can facilitate the disassembly and assembly of the V-shaped oil seal ring 113. At the same time, the V-shaped opening 1131 of the V-shaped oil seal ring 113 faces the cavity on one side of the end, so as to oil-seal the cavity on this side through the V-shaped oil seal ring 113, thereby ensuring the sealing between the cylinder piston 11 and the inner wall of the cylinder.

[0039] Specifically, the two piston end covers 112 can be respectively buckled at the two ends of the oil plug body 111 (such as Figure 3 The left and right ends shown in the figure) can limit and clamp the V-shaped oil seal ring 113, so that the V-shaped oil seal ring 113 is limited and clamped between the side wall of the sealing installation groove 1111, that is, the limiting step surface of the V-shaped oil seal ring 113 and the piston end cover 112, which can facilitate the disassembly and assembly of the V-shaped oil seal ring 113. At the same time, the V-shaped opening 1131 of the V-shaped oil seal ring 113 faces the cavity on one side of the end, so as to oil-seal the cavity on this side through the V-shaped oil seal ring 113, thereby ensuring the sealing between the cylinder piston 11 and the inner wall of the cylinder, especially when the piston end cover 112 is worn with use, the V-shaped oil seal ring 113 can improve the sealing and avoid the circulation of hydraulic oil between the cavities on both sides, thereby ensuring that the cylinder can accurately output hydraulic pressure with the movement of the cylinder piston, thereby ensuring the clamping stability of the workpiece.

[0040] In this embodiment, the piston end cover 112 is provided with a clamping groove 1121 adapted to the bottom wall of the sealing installation groove 1111, and is used to be clamped on the bottom wall of the sealing installation groove 1111. Specifically, the clamping groove 1121 can be a circular groove structure, which is adapted to the sealing installation groove 1111 to be buckled on the sealing installation groove 1111.

[0041] Continue to see Figure 3 The oil plug body 111 and the two piston end covers 112 are provided with coaxially arranged mounting holes 115 for mounting the piston rod 3, so that the piston rod 3 can pass through the oil plug body 111 and the two piston end covers 112, and be fixedly mounted on the oil plug body 111 and the two piston end covers 112, thereby realizing the linkage between the two, especially realizing the linkage between the oil cylinder piston 11 and the cylinder piston 21.

[0042] Continue to see Figure 3 and Figure 4 The two ends of the V-shaped opening 1131 of the V-shaped oil seal ring 113 (such as Figure 4The upper and lower ends shown in the figure) are arranged along the thickness direction of the V-shaped oil seal ring 113 (as shown in the figure Figure 4 A support portion 1132 is provided outside the V-shaped opening 1131 (in the vertical direction shown in FIG. 1 ) to abut against the piston end cover 112 and the inner wall of the cylinder barrel. Specifically, the support portion 1132 and the V-shaped oil seal ring 113 are an integral structure, and the side wall of the support portion 1132 (such as Figure 4 The left side wall of the support portion 1132 (as shown in FIG. 1 ) can abut against the piston end cover 112, thereby increasing the contact area between the V-shaped oil seal ring 113 and the piston end cover 112. Figure 3 The upper and lower end walls shown in the figure can abut against the inner wall of the cylinder barrel to limit and support the oil seal, thereby improving the effect of the oil seal.

[0043] In this embodiment, the sealing of the V-shaped oil seal ring 113 is mainly achieved by the elasticity of the polyurethane material itself. With use, the sealing supports 1133 on both sides of the V-shaped oil seal ring 113 are deformed by extrusion. In the case of long-term compression deformation, the compression performance of the sealing support 1133 becomes larger, and the elastic reset search causes the sealing effect to deteriorate. In order to further improve the sealing effect of the V-shaped oil seal ring 113, continue to refer to Figures 4 to 6 , an elastic member 114 is provided at the V-shaped opening 1131 of the V-shaped oil seal ring 113, which is used to deform along with the sealing support body 1133 on both sides of the V-shaped opening 113 when the sealing support body 1133 on both sides of the V-shaped opening 113 is deformed and compressed, i.e., when it is deformed by extrusion, and to apply a reset force to the sealing support body 1133, so that the sealing support body 1133 can be reset, i.e., keep the opening, so as to ensure the sealing performance of the V-shaped oil seal ring 113 to the hydraulic oil.

[0044] In one implementation of the V-shaped oil seal ring 113 in this embodiment, Figure 4 As shown, the elastic member 114 is a V-shaped structure, which is arranged along the inner wall of the V-shaped opening 1131, that is, the elastic member 114 is set in the V-shaped opening 1131 and arranged along the inner wall of the V-shaped opening 1131 to apply a reverse force to the two sealing supports 1133 on both sides, so that the two sealing supports 1133 open in the opposite direction to ensure the sealing of the hydraulic oil.

[0045] In another implementation of the V-shaped oil seal ring 113 in this embodiment, Figure 5 and Figure 6As shown, the V-shaped oil seal ring 113 is provided with a V-shaped groove 1134 along the inner wall of the V-shaped opening 1131, and the elastic member 114 is a V-shaped structure and is arranged in the V-shaped groove 1134. Specifically, the V-shaped groove 1134 is opened at the V-shaped opening 1131 of the V-shaped oil seal ring 113, so that the elastic member 114 is embedded in the V-shaped oil seal ring 113, and a reverse force can be applied to the two sealing supports 1133 on both sides, so that the two sealing supports 1133 are opened in the opposite direction to ensure the sealing of the hydraulic oil.

[0046] Second embodiment:

[0047] The energy-saving hydraulic station provided in the second embodiment differs from the energy-saving hydraulic station provided in the first embodiment in the structure of the oil cylinder piston 1, especially the structure of the oil plug body at the sealing installation groove, and no piston end cover is required in this embodiment. The positional relationship and connection relationship between other components are the same as those in the first embodiment.

[0048] See also Figure 7 and Figure 8 , which shows the preferred structure of the oil cylinder piston provided in the second embodiment of the utility model. As shown in the figure, both ends of the oil plug body 111 of the oil cylinder piston 11 are provided with sealing installation grooves 1111, and each sealing installation groove 1111 is provided with a V-shaped oil seal ring 113, and the V-shaped openings 1131 of the two V-shaped oil seal rings 113 in the two sealing installation grooves 1111 are arranged back to back for oil sealing. Specifically, the structure of the sealing installation groove 1111 is different from that in the first embodiment. The sealing installation groove 1111 can be a U-shaped groove structure and is arranged along the circumference of the oil plug body 111 to form an annular clamping groove structure, so that the V-shaped oil seal ring 113 can be clamped in the sealing installation groove 1111. The two V-shaped oil seals 113 can be installed in the two sealing installation grooves 1111 respectively, and the two V-shaped oil seals 113 are installed in opposite directions, that is, the V-shaped openings 1131 of the two V-shaped oil seals 113 are arranged opposite to each other, that is, the V-shaped opening 1131 of the left V-shaped oil seal 113 is arranged to open to the left, and the V-shaped opening 1131 of the right V-shaped oil seal 113 is arranged to open to the right, so as to respectively seal the hydraulic oil on both sides of the oil plug body 111. In this embodiment, the outer diameter of the V-shaped oil seal 113 in a free state is greater than the outer diameter of the oil plug body 111.

[0049] In this embodiment, a mounting hole 115 is provided on the oil plug body 111 for mounting the piston rod 3, so that the piston rod 3 can pass through the oil plug body 111 and be fixedly mounted on the oil plug body 111, thereby realizing the linkage between the two, especially realizing the linkage between the oil cylinder piston 11 and the air cylinder piston 21.

[0050] Third embodiment:

[0051] The energy-saving hydraulic station provided in the third embodiment differs from the energy-saving hydraulic station provided in the second embodiment in that the structure of the sealing installation groove 1111 is as follows: Fig. 9 As shown, the sealing installation groove 1111 can be a notch structure with openings on both sides and arranged along the entire circumference of the oil plug body 111, so that the side wall of the sealing installation groove 1111 serves as a limiting step surface. In this embodiment, the V-shaped oil seal ring 113 can be limited by other structures, for example, the V-shaped oil seal ring 113 and the oil plug body 111 can be limited and fixed by limiting protrusions and limiting grooves, that is, the oil plug body 111 is provided with limiting protrusions arranged along the entire circumference of the sealing installation groove 1111 on the bottom wall, and the V-shaped oil seal ring 113 is provided with limiting grooves matched with the limiting protrusions, which can be limited and fixed. Of course, the limiting and fixing can also be performed by other methods, which are not limited in this embodiment.

[0052] In summary, the oil cylinder piston and the energy-saving hydraulic station with the oil cylinder piston provided in each embodiment of the utility model, through two V-shaped oil sealing rings with openings facing each other arranged at the two ends of the oil plug body, and through two piston end covers arranged on both sides of the oil plug body to limit and clamp the two V-shaped oil sealing rings, so that the two V-shaped oil sealing rings are respectively clamped on the two ends of the oil plug body, and oil-sealed by the V-shaped oil sealing rings, thereby ensuring that the oil cylinder piston effectively seals and separates the cavities on both sides of the oil cylinder, avoiding the flow of hydraulic oil between the cavities on both sides, thereby ensuring the movement of the oil cylinder piston, and can accurately output hydraulic pressure, and then accurately execute through hydraulic pressure, such as clamping the workpiece, which can avoid problems such as the workpiece not being clamped tightly and the tool hitting.

[0053] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A cylinder piston, characterized in that: include: Oil plug body; wherein, Both ends of the oil plug body are provided with sealing installation grooves, each of which is provided with a V-shaped oil sealing ring, and the V-shaped openings of the two V-shaped oil sealing rings in the two sealing installation grooves are arranged back to back for oil sealing.

2. The oil cylinder piston according to claim 1, characterized in that: Also includes: Two piston end covers; among which, The sealing installation groove is a notch structure with openings on both sides and is arranged along the entire circumference of the oil plug body, so that the side wall of the sealing installation groove serves as a limiting step surface; The two piston end covers are respectively arranged at the two ends of the oil plug body, and are used to clamp the V-shaped oil seal ring so that the V-shaped oil seal ring is limitedly clamped between the limiting step surface of the sealing installation groove and the piston end cover.

3. The oil cylinder piston according to claim 2, characterized in that: The piston end cover is provided with a fixing groove matched with the bottom wall of the sealing installation groove, and is used for fixing on the bottom wall of the sealing installation groove.

4. The oil cylinder piston according to claim 1, characterized in that: The sealing installation groove is a U-shaped structure and is arranged along the entire circumference of the oil plug body, so that the V-shaped oil seal ring can be stuck in the sealing installation groove; or, The sealing installation groove is a notch structure with openings on both sides and is arranged along the entire circumference of the oil plug body, so that the side wall of the sealing installation groove serves as a limiting step surface.

5. The oil cylinder piston according to claim 2 or 3, characterized in that: A V-shaped opening is provided at one end of the V-shaped oil seal ring, and support portions are extended from both ends of the V-shaped opening to the outside of the V-shaped opening along the thickness direction of the V-shaped oil seal ring for abutting against the piston end cover and the inner wall of the cylinder barrel.

6. The oil cylinder piston according to any one of claims 1 to 4, characterized in that: An elastic member is provided at the V-shaped opening of the V-shaped oil seal ring, which is used to deform the sealing supports on both sides of the V-shaped opening and apply a restoring force to the sealing supports when the sealing supports are deformed by being squeezed, so that the sealing supports can be reset.

7. The oil cylinder piston according to claim 6, characterized in that: The elastic member is a V-shaped structure and is arranged along the inner wall of the V-shaped opening.

8. The oil cylinder piston according to claim 6, characterized in that: The V-shaped oil seal ring is provided with a V-shaped groove along the inner wall of the V-shaped opening, and the elastic member is a V-shaped structure and is arranged in the V-shaped groove.

9. The oil cylinder piston according to any one of claims 1 to 4, characterized in that: The oil plug body is provided with a mounting hole for mounting the piston rod.

10. An energy-saving hydraulic station, comprising: A gas-liquid booster pump and a control valve group for controlling the reversal of the gas-liquid booster pump; the gas-liquid booster pump comprises a linked gas cylinder and an oil cylinder; it is characterized in that: the oil cylinder barrel of the oil cylinder is provided with an oil cylinder piston as described in any one of claims 1 to 9.

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