Hydraulic cylinder piston rod sealing assembly

Abstract

The utility model relates to the technical field of hydraulic cylinder piston rod sealing, in particular to a hydraulic cylinder piston rod sealing assembly which comprises a piston rod body, a blocking table is fixed to the side face of the piston rod body, and a hydraulic rod sealing position sealing assembly is arranged on the side face of the piston rod body in a sleeved mode and comprises a connecting cylinder. A plurality of curved plates are inserted into the inner side of the connecting cylinder, three round holes are formed in the side face of each curved plate, grooves are formed in the positions, located at the round holes, of the inner side of the connecting cylinder, partition plates are inserted among the curved plates, connecting ring pads are fixed to the top ends of the partition plates, clamping ring grooves are formed in the top of the inner side of the connecting cylinder, and positioning gaskets are clamped into the clamping ring grooves. The sealing connecting piece solves the problems that a sealing connecting piece between an existing hydraulic cylinder and a piston rod and the piston rod are generally large in contact area and friction force, lubricating oil needs to be frequently used for maintenance, and certain limitation exists.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinder piston rod sealing, in particular to a hydraulic cylinder piston rod sealing assembly. Background Technique

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it can eliminate the deceleration device, and there is no transmission gap, and the motion is stable. Therefore, it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of the piston and the pressure difference on both sides; the hydraulic cylinder basically consists of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device;

[0003] The sealing problem between the hydraulic cylinder and the piston rod has always been a difficult problem in this field. Generally, a sealing connector is used between the existing piston rod and the hydraulic cylinder for sealing. However, the existing sealing connector and the piston rod are generally in surface contact, and the contact area is large. Lubricating oil needs to be applied to reduce the friction force. Otherwise, dry friction is likely to occur. Therefore, frequent maintenance is required, which has certain limitations. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that the contact area between the existing sealing connector between the hydraulic cylinder and the piston rod and the piston rod is generally large, the friction force is large, and lubricating oil needs to be frequently used for maintenance, which has certain limitations.

[0005] To solve the above problems, the technical solution adopted by the utility model is a hydraulic cylinder piston rod sealing assembly, which includes a piston rod body. A retaining table is fixed on the side of the piston rod body. A hydraulic rod sealing assembly at the sealing position is sleeved on the side of the piston rod body. The hydraulic rod sealing assembly at the sealing position includes a connecting cylinder. A plurality of curved panels are inserted inside the connecting cylinder. Three circular holes are opened on the side of each curved panel. Grooves are opened at the positions of the circular holes inside the connecting cylinder. Partition plates are inserted between the plurality of curved panels. A connecting ring gasket is fixed at the top of the partition plate. A clamping ring groove is opened at the top inside the connecting cylinder, and a positioning gasket is clamped in the clamping ring groove.

[0006] As a further scheme of the utility model: a ball is arranged in the circular hole on one side of the curved panel. A compression spring is clamped between the ball and one side of the groove. The compression spring pushes the ball to contact the piston rod body.

[0007] As a further scheme of the utility model: a thread groove is opened on the outer side of the connecting cylinder. Two sealing rings are sleeved on one side of the outer side of the connecting cylinder to facilitate connection to one end of an external hydraulic cylinder.

[0008] As a further solution of the present utility model: The surface of the ball is in contact with the outer side of the piston rod body, reducing the contact area, decreasing the friction force, and facilitating the more flexible movement of the piston rod body.

[0009] As a further solution of the present utility model: The number of several round holes is three.

[0010] The advantages of the present utility model compared with the prior art are as follows: This patent adds a ball structure. Through the contact between the ball structure and the piston rod body, the contact area between the piston rod body and the sealing component is reduced, the friction force is decreased, so that the piston rod can be flexibly telescoped, and the maintenance frequency can be reduced, saving time. Description of the Drawings

[0011] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0012] Figure 1 is a three-dimensional view of the overall structure in a sealing component of a hydraulic cylinder piston rod of the present utility model.

[0013] Figure 2 is a cross-sectional view of the overall structure in a sealing component of a hydraulic cylinder piston rod of the present utility model.

[0014] Figure 3 is a schematic diagram of the positional relationship of the curved panel, partition board, and connecting ring gasket in a sealing component of a hydraulic cylinder piston rod of the present utility model.

[0015] Figure 4 is an enlarged view of the structure of part A in a sealing component of a hydraulic cylinder piston rod of the present utility model.

[0016] Figure 5 is an enlarged view of the structure of part B in a sealing component of a hydraulic cylinder piston rod of the present utility model.

[0017] In the drawings:

[0018] 1. Piston rod body; 2. Connecting cylinder; 3. Curved panel; 4. Partition board; 5. Connecting ring gasket; 6. Positioning washer; 7. Ball; 8. Compression spring; 9. Sealing ring; 1.1. Stopping platform; 2.1. Groove; 2.2. Clamping ring groove; 3.1. Round hole. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention provides a technical solution: to solve the existing problems proposed in the background technology.

[0021] Combined with the attached Figure 1 , it can be known that the structure includes a piston rod body 1. A retaining platform 1.1 is fixed on the side of the piston rod body 1. A hydraulic rod sealing assembly is sleeved on the side of the piston rod body 1. The hydraulic rod sealing assembly includes a connecting cylinder 2. Thread grooves are formed on the outer side of the connecting cylinder 2. Two sealing rings are sleeved on the outer side of the connecting cylinder 2 so as to be connected to one end of an external hydraulic cylinder.

[0022] Combined with the attached Figures 2 - 4 , it can be known that several curved panels 3 are inserted into the inner side of the connecting cylinder 2. Three circular holes 3.1 are formed on the side of each curved panel 3. Grooves 2.1 are formed on the inner side of the connecting cylinder 2 at the positions of the circular holes 3.1. Partition plates 4 are inserted between several curved panels 3. A connecting ring gasket 5 is fixed at the top of the partition plate 4. A ball 7 is arranged in the circular hole 3.1 on one side of the curved panel 3. A compression spring 8 is clamped between the ball 7 and one side of the groove 2.1. The compression spring 8 pushes the ball 7 to contact the piston rod body 1, reducing the contact area and friction, and facilitating the more flexible movement of the piston rod body 1.

[0023] Combined with the attached Figure 5 , it can be known that a clamping ring groove 2.2 is formed at the top of the inner side of the connecting cylinder 2. A positioning washer 6 is clamped in the clamping ring groove 2.2, which can limit the position of the connecting ring gasket 5 and prevent it from detaching from the inner side of the connecting cylinder 2.

[0024] The working principle of this application is as follows: When installing the sealing component at the sealing part of the hydraulic rod, first, the sealing ring is sleeved on the outside of the connecting cylinder 2, then the compression spring 8 is placed into the groove 2.1, then the ball 7 is placed in the round hole 3.1, and then the curved panels 3 are placed one by one on the inside of the connecting cylinder 2. Then, the partition plate 4 is inserted between every two curved panels 3 to fix the positions of the curved panels 3. Then, the positioning washer 6 is snap-fitted into the snap-ring groove 2.2. Then, the assembled sealing component at the sealing part of the hydraulic rod is sleeved on the outside of the piston rod body 1. The ball 7 is always in contact with the outside of the piston rod body 1 under the push of the compression spring 8. When the sealing component at the sealing part of the hydraulic rod is moved to the retaining table 1.1, the piston rod body 1 can be inserted into the inside of the external hydraulic cylinder, and the connecting cylinder 2 and the external hydraulic cylinder are screwed and tightened together, thus completing the assembly.

[0025] The above describes the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the creative concept of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder piston rod seal assembly, comprising a piston rod body (1), a stopper (1.1) being fixed to the side of the piston rod body (1), characterized in that: The side of the piston rod body (1) is sleeved with a sealing assembly for the hydraulic rod seal, which comprises a connecting tube (2), a plurality of curved plates (3) are inserted into the inner side of the connecting tube (2), a plurality of round holes (3.1) are provided on the side of each curved plate (3), a groove (2.1) is provided on the inner side of the connecting tube (2) at the round hole (3.1), a partition (4) is inserted between the plurality of curved plates (3), a connecting ring gasket (5) is fixed on the top of the partition (4), a clamping ring groove (2.2) is provided on the inner top of the connecting tube (2), and a positioning gasket (6) is clamped in the clamping ring groove (2.2).

2. A hydraulic cylinder piston rod seal assembly according to claim 1, characterized in that: A ball (7) is provided in the circular hole (3.1) on one side of the curved plate (3), and a compression spring (8) is sandwiched between the ball (7) and one side of the groove (2.1).

3. A hydraulic cylinder piston rod seal assembly according to claim 1, characterized in that: The outer side of the connecting tube (2) is provided with a thread groove, and two sealing rings (9) are sleeved on the outer side of the connecting tube (2) above and below the thread groove.

4. A hydraulic cylinder piston rod seal assembly according to claim 2, characterized in that: The surface of the ball (7) is in contact with the outer side of the piston rod body (1).

5. The hydraulic cylinder piston rod seal assembly according to claim 2, characterized in that: The number of the plurality of circular holes (3.1) is three.

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