Anti-air-leakage high-sealing hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses an anti-air-leakage high-sealing hydraulic oil cylinder, two ends of a hydraulic oil cylinder main body are connected with sealing sleeves, one end of each sealing sleeve is provided with a piston rod in a penetrating manner, and one end of each piston rod is connected with a first mounting seat; a second mounting seat is arranged on the other side of the hydraulic oil cylinder body, a sealing ring is arranged at the position, close to the sealing sleeve, of the outer portion of the hydraulic oil cylinder body, a connecting pipe is arranged at the front end of the oil inlet pipe, and a first connecting sleeve is arranged at the position, close to the oil inlet pipe, of the outer portion of the connecting pipe. The anti-reflux sleeve is embedded into the oil inlet pipe, and the first connecting sleeve is in threaded connection with the outside of the connecting pipe, so that the connecting pipe and the oil inlet pipe can be connected for use, entering oil can be filtered through the filter screen after connection, and reflux of the oil can be avoided through the anti-reflux plate; the normal use of the hydraulic oil cylinder main body is influenced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a high-sealing hydraulic cylinder that prevents air leakage. Background Technology

[0002] Hydraulic cylinders are hydraulic actuators that convert hydraulic energy into mechanical energy. They operate by linear reciprocating motion or oscillating motion and are widely used in the hydraulic systems of various mechanical equipment, such as cranes, excavators, and injection molding machines, to achieve force transmission and control.

[0003] Chinese patent discloses a high-sealing hydraulic cylinder (authorization announcement number CN221003348U). This patented technology can improve the sealing performance of the device by setting a first boss and a second boss, as well as an external fourth sealing ring, a second sealing ring, and a third sealing ring. Moreover, the sealing performance of the device can be further improved by using the first sealing ring. Furthermore, the setting of a circular plate and a frustum can buffer the piston block and extend the service life of the piston block.

[0004] However, most existing hydraulic cylinders use sealing rings at the connection points, resulting in poor sealing performance. For example, the aforementioned comparative document uses a connection-based sealing method. In practical applications, when the internal or connection-based sealing rings are damaged, leaks can easily occur at the connection points, affecting the use of the hydraulic cylinder body. Therefore, those skilled in the art have provided a high-sealing hydraulic cylinder that prevents air leakage to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a high-sealing hydraulic cylinder that prevents air leakage, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-sealing hydraulic cylinder with leak-proof design includes a hydraulic cylinder body and an oil outlet pipe and an oil inlet pipe arranged from left to right outside the hydraulic cylinder body. Both ends of the hydraulic cylinder body are connected to sealing sleeves. A piston rod is inserted through one end of the sealing sleeve. One end of the piston rod is connected to a first mounting seat. A second mounting seat is provided on the other side of the hydraulic cylinder body. A sealing ring is provided on the outside of the hydraulic cylinder body near the sealing sleeves. A connecting pipe is provided at the front end of the oil inlet pipe. A first connecting sleeve is provided on the outside of the connecting pipe near the oil inlet pipe.

[0008] As a further improvement of this utility model: a positioning pin is symmetrically provided on one side of the sealing sleeve, and positioning holes that are compatible with the positioning pin are opened at both ends of the hydraulic cylinder body.

[0009] As a further improvement of this utility model: a sealing ring is provided at one end of the sealing sleeve near the hydraulic cylinder body, and the sealing ring is made of rubber.

[0010] As a further improvement of this utility model: both the hydraulic cylinder body and the sealing sleeve are provided with external threads, and the inner side of the sealing ring is provided with internal threads that engage with each other.

[0011] As a further improvement of this utility model: a filter screen is provided inside the connecting pipe, and the first connecting sleeve is threadedly connected to the outside of the oil inlet pipe.

[0012] As a further embodiment of this utility model: the rear end of the connecting pipe is connected to an anti-backflow sleeve inside the oil inlet pipe, the anti-backflow sleeve has a groove on its outer side, a rotating shaft is provided inside the groove, a rotating plate is sleeved on the outside of the rotating shaft, and an anti-backflow plate is connected to one side of the rotating plate.

[0013] As a further improvement of this utility model: the radius of the anti-backflow plate is the same as the radius of the anti-backflow sleeve, and a torsion spring is also provided on the outside of the rotating shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model achieves positioning connection between the sealing sleeve and the hydraulic cylinder body by embedding the positioning pin into the positioning hole, and improves the sealing performance of the connection by using the sealing ring to prevent air leakage from affecting the normal use of the hydraulic cylinder body. At the same time, the sealing ring is rotated on the external thread of the hydraulic cylinder body and the sealing sleeve, which facilitates the high-sealing connection between the sealing sleeve and the hydraulic cylinder body, making it highly practical.

[0016] 2. This utility model embeds the anti-backflow sleeve inside the oil inlet pipe and connects the first connecting sleeve to the external thread of the connecting pipe, thereby enabling the connection between the connecting pipe and the oil inlet pipe. After connection, the incoming oil can be filtered through the filter screen, and the anti-backflow plate can prevent the backflow of oil from affecting the normal use of the hydraulic cylinder body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a high-seal hydraulic cylinder that prevents air leakage.

[0018] Figure 2 A schematic diagram of the sealing ring in a high-seal hydraulic cylinder that prevents air leakage;

[0019] Figure 3 for Figure 2 Enlarged view of section A;

[0020] Figure 4 A schematic diagram of the anti-backflow sleeve in a high-seal hydraulic cylinder that prevents air leakage;

[0021] Figure 5 This is a schematic diagram of the anti-backflow plate in a high-sealing hydraulic cylinder that prevents air leakage.

[0022] In the diagram: 1. Hydraulic cylinder body; 11. Oil outlet pipe; 12. Oil inlet pipe; 2. Sealing sleeve; 21. Piston rod; 22. First mounting seat; 3. Second mounting seat; 4. Connecting pipe; 41. First connecting sleeve; 42. Anti-backflow sleeve; 43. Anti-backflow plate; 431. Rotating plate; 44. Filter screen; 5. Sealing ring; 51. Sealing ring; 52. Positioning pin; 53. Positioning hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0024] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Example 1:

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment proposes a high-sealing hydraulic cylinder with leak-proof design, including a hydraulic cylinder body 1 and an oil outlet pipe 11 and an oil inlet pipe 12 arranged from left to right outside the hydraulic cylinder body 1. Both ends of the hydraulic cylinder body 1 are connected to sealing sleeves 2. A piston rod 21 is provided through one end of the sealing sleeve 2. A first mounting seat 22 is connected to one end of the piston rod 21. A second mounting seat 3 is provided on the other side of the hydraulic cylinder body 1. A sealing ring 5 is provided on the outside of the hydraulic cylinder body 1 near the sealing sleeve 2. A connecting pipe 4 is provided at the front end of the oil inlet pipe 12. A first connecting sleeve 41 is provided on the outside of the connecting pipe 4 near the oil inlet pipe 12. The sealing ring 5 can improve the sealing performance between the sealing sleeve 2 and the hydraulic cylinder body 1. At the same time, the anti-backflow plate 43 can achieve the purpose of preventing backflow. It has good practicality.

[0030] Example 2:

[0031] The solution in Example 1 will be further described below with reference to its specific working method.

[0032] like Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, a positioning pin 52 is symmetrically arranged on one side of the sealing sleeve 2, and positioning holes 53 that are adapted to the positioning pin 52 are opened at both ends of the hydraulic cylinder body 1. This arrangement can achieve the purpose of positioning and connecting the sealing sleeve 2 by embedding the positioning pin 52 into the positioning hole 53.

[0033] like Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, a sealing ring 51 is further provided at one end of the sealing sleeve 2 near the hydraulic cylinder body 1. The sealing ring 51 is made of rubber. This arrangement can improve the sealing performance of the connection by using the sealing ring 51.

[0034] like Figure 2 As shown, in a preferred embodiment, based on the above method, both the hydraulic cylinder body 1 and the sealing sleeve 2 are provided with external threads on their exteriors, and the inner side of the sealing ring 5 is provided with an internal thread that engages with the external threads. This arrangement utilizes the external thread connection of the sealing ring 5 to rotate between the hydraulic cylinder body 1 and the sealing sleeve 2, thereby achieving the sealing performance at the connection of the hydraulic cylinder body 1.

[0035] like Figure 1 and Figure 4As shown, in a preferred embodiment, based on the above method, a filter screen 44 is further provided inside the connecting pipe 4, and the first connecting sleeve 41 is threaded to the outside of the oil inlet pipe 12. This arrangement utilizes the filter screen 44 to efficiently filter the oil entering the hydraulic cylinder body 1, thereby improving the service life of the hydraulic cylinder body 1.

[0036] like Figure 4 and Figure 5 As shown, in a preferred embodiment, based on the above method, the rear end of the connecting pipe 4 is further connected to an anti-backflow sleeve 42 inside the oil inlet pipe 12. The anti-backflow sleeve 42 has a groove on its outer side, and a rotating shaft is provided inside the groove. A rotating plate 431 is sleeved on the outside of the rotating shaft. An anti-backflow plate 43 is connected to one side of the rotating plate 431. The radius of the anti-backflow plate 43 is the same as the radius of the anti-backflow sleeve 42. A torsion spring is also provided outside the rotating shaft. This arrangement uses the torsion spring to make the anti-backflow plate 43 shield and protect the anti-backflow sleeve 42, so as to avoid backflow.

[0037] Example 3:

[0038] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0039] Specifically, during operation / use of this leak-proof high-sealing hydraulic cylinder: First, install the sealing sleeve 2 onto both ends of the hydraulic cylinder body 1. During installation, the sealing ring 51 can be placed on both ends of the hydraulic cylinder body 1, and the positioning pin 52 at one end of the sealing sleeve 2 can be embedded into the positioning hole 53. This achieves the purpose of positioning and connecting the hydraulic cylinder body 1. By rotating the sealing ring 5 on the outside of the hydraulic cylinder body 1, the hydraulic cylinder body 1 and the sealing sleeve 2 can be sealed together, improving the sealing performance at the connection and improving practicality. At the same time, the anti-backflow sleeve 42 is embedded into the oil inlet pipe 12, and the first connecting sleeve 41 is threaded onto the outside of the connecting pipe 4, thereby connecting the connecting pipe 4 and the oil inlet pipe 12. After connection, the incoming oil can be filtered through the filter screen 44, and the anti-backflow plate 43 can prevent the backflow of oil, thus avoiding affecting the normal use of the hydraulic cylinder body 1.

[0040] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A high-sealing hydraulic cylinder with leak-proof design, comprising a hydraulic cylinder body (1) and an oil outlet pipe (11) and an oil inlet pipe (12) disposed from left to right outside the hydraulic cylinder body (1), characterized in that, Both ends of the hydraulic cylinder body (1) are connected to sealing sleeves (2). A piston rod (21) is provided through one end of the sealing sleeve (2). A first mounting seat (22) is connected to one end of the piston rod (21). A second mounting seat (3) is provided on the other side of the hydraulic cylinder body (1). A sealing ring (5) is provided on the outside of the hydraulic cylinder body (1) near the sealing sleeve (2). A connecting pipe (4) is provided at the front end of the oil inlet pipe (12). A first connecting sleeve (41) is provided on the outside of the connecting pipe (4) near the oil inlet pipe (12).

2. The high-sealing hydraulic cylinder with anti-leakage as described in claim 1, characterized in that, The sealing sleeve (2) is symmetrically provided with positioning pins (52) on one side, and the hydraulic cylinder body (1) is provided with positioning holes (53) at both ends that are compatible with the positioning pins (52).

3. The high-sealing hydraulic cylinder with anti-leakage as described in claim 1, characterized in that, A sealing ring (51) is provided at one end of the sealing sleeve (2) near the hydraulic cylinder body (1), and the sealing ring (51) is made of rubber.

4. The high-sealing hydraulic cylinder with anti-leakage as described in claim 1, characterized in that, The hydraulic cylinder body (1) and the sealing sleeve (2) are both provided with external threads, and the inner side of the sealing ring (5) is provided with internal threads that are screwed together by the external threads.

5. A high-sealing hydraulic cylinder with anti-leakage as described in claim 1, characterized in that, The connecting pipe (4) is equipped with a filter screen (44), and the first connecting sleeve (41) is threaded to the outside of the oil inlet pipe (12).

6. A high-sealing hydraulic cylinder with anti-leakage as described in claim 1, characterized in that, The rear end of the connecting pipe (4) is connected to an anti-backflow sleeve (42) inside the oil inlet pipe (12). The anti-backflow sleeve (42) has a groove on its outer side. A rotating shaft is provided inside the groove. A rotating plate (431) is sleeved on the outside of the rotating shaft. An anti-backflow plate (43) is connected to one side of the rotating plate (431).

7. A high-sealing hydraulic cylinder with leak-proof design according to claim 6, characterized in that, The radius of the anti-backflow plate (43) is the same as the radius of the anti-backflow sleeve (42), and a torsion spring is also provided on the outside of the rotating shaft.

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