Buffering sealing piece of piston rod

Abstract

The utility model discloses a piston rod buffering sealing piece, and particularly relates to the technical field of sealing pieces, the piston rod buffering sealing piece comprises a buffering sealing assembly, a plurality of abutting assemblies are arranged on the top face of the buffering sealing assembly, each abutting assembly comprises a threaded hollow cylinder, a circular groove is formed in each threaded hollow cylinder, and the circular grooves are communicated with the threaded hollow cylinders. A first magnetic plate is fixedly mounted on the bottom face of the circular groove, a second magnetic plate is slidably mounted in the circular groove, an abutting rod is movably inserted into the center of the top face of the threaded hollow cylinder, and the bottom end of the abutting rod is fixedly connected with the middle of the top face of the second magnetic plate. According to the buffer sealing piece for the piston rod, deformation of the inner lip can become regular by movably inserting the abutting rod in the threaded hollow cylinder, deformation irregularity of the inner ring body is reduced, meanwhile, the abutting rod can abut against the abutting block under the action of the first magnetic plate and the second magnetic plate, and therefore the inner lip can be better attached to the surface of the piston rod, and even if deformation occurs, the inner lip can be prevented from falling off. And a correction effect can be achieved in an auxiliary mode, and the service life of the buffering sealing piece is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, specifically to a piston rod buffer seal. Background Technology

[0002] When commonly used hydraulic cylinders operate under high pressure, a polyurethane buffer seal is installed in front of the main seal of the piston rod. It focuses on minimizing the thickness of the oil film to prevent the second seal of the piston rod, namely the main seal, from bearing pressure and to prevent the piston rod main seal from being squeezed out and worn due to pressure.

[0003] Chinese patent application number 202220742760.X discloses a buffer seal for a piston rod, comprising an annular sealing body and a retaining ring. The inner ring of the sealing body has an inner lip protruding towards the axis of the sealing body, and the cross-section of the inner lip is arc-shaped. A mating groove penetrating the inner ring of the sealing body is formed on the end face of the sealing body away from the inner lip. The retaining ring is embedded in the mating groove. A secondary lip is formed on the retaining ring towards the axis of the sealing body, and the cross-section of the secondary lip is arc-shaped. In its natural state, the vertical distance between the inner lip and the axis of the sealing body is smaller than the vertical distance between the secondary lip and the axis of the sealing body. This application has the effect of reducing the contact pressure gradient at the inner lip, allowing an appropriate amount of oil film to pass through the new structure for buffer sealing, reducing the friction at the main seal, reducing the temperature of the piston rod surface, and extending the sealing life of the main seal.

[0004] However, the piston rod's buffer seal still has some shortcomings in actual use. For example, after long-term use, the sealing body itself will deform, that is, the inner ring body will deform more severely, which will lead to a decrease in the buffering and sealing effect, affecting the sealing effect of the main seal. Utility Model Content

[0005] The purpose of this invention is to provide a piston rod buffer seal to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a piston rod buffer seal, comprising a buffer sealing assembly, wherein a plurality of abutment components are provided on the top surface of the buffer sealing assembly;

[0007] The clamping assembly includes a threaded hollow cylinder with a circular groove inside. A first magnetic plate is fixedly installed on the bottom surface of the circular groove, and a second magnetic plate is slidably installed inside the circular groove. A stop rod is movably inserted into the center of the top surface of the threaded hollow cylinder, and the bottom end of the stop rod is fixedly connected to the middle of the top surface of the second magnetic plate. The first and second magnetic plates are arranged opposite each other with the same poles and mutually exclusive.

[0008] Preferably, the buffer sealing assembly includes a sealing body, an outer ring body is provided on the outside of the sealing body, and an inner ring body is provided on the inner surface of the sealing body.

[0009] Preferably, a buffer groove is provided on the top surface of the sealing body, and a plurality of threaded cylinders are provided on the inner wall of the buffer groove near the outer ring body, and a plurality of mating blocks are provided on the inner wall of the buffer groove near the inner ring body.

[0010] Preferably, one side of each of the mating blocks is provided with an insertion interface, a clearance groove is provided in the middle of the inner ring body, and a retaining ring is provided at the bottom edge of the inner ring body.

[0011] Preferably, a plurality of threaded cylinders correspond one-to-one with a plurality of threaded hollow cylinders, and the top surface of each of the plurality of threaded cylinders is provided with a threaded opening. The threaded hollow cylinders are threadedly inserted into the threaded openings. A plurality of push rods correspond one-to-one with a plurality of insertion interfaces, and the top end of each push rod is movably inserted into the insertion interface.

[0012] Preferably, several abutting components are arranged in a ring within the buffer groove of the buffer sealing component.

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

[0014] The piston rod buffer seal can make the deformation of the inner lip more regular by the movable insertion of the push rod in the threaded hollow cylinder, reducing the irregularity of the inner ring body deformation. At the same time, under the action of the first and second magnetic plates, the push rod will abut against the mating block, so that the inner lip can fit better with the piston rod surface. Even if deformation occurs, it can play an auxiliary corrective role and improve the service life of the buffer seal. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the buffer sealing assembly of this utility model;

[0017] Figure 3 This is a three-dimensional cross-sectional structural diagram of the buffer sealing assembly of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the clamping component of this utility model.

[0019] In the diagram: 1. Buffer sealing assembly; 101. Sealing body; 102. Outer ring; 103. Inner ring; 104. Buffer groove; 105. Threaded cylinder; 106. Connecting block; 107. Insertion interface; 108. Relief groove; 109. Retaining ring; 2. Clamping assembly; 201. Threaded hollow cylinder; 202. Circular groove; 203. Magnetic plate No. 1; 204. Magnetic plate No. 2; 205. Clamping rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-4 As shown, this utility model provides a technical solution: including a buffer sealing component 1, wherein a plurality of abutting components 2 are provided on the top surface of the buffer sealing component 1;

[0022] The clamping assembly 2 includes a threaded hollow cylinder 201, a circular groove 202 is provided inside the threaded hollow cylinder 201, a first magnetic plate 203 is fixedly installed on the bottom surface of the circular groove 202, a second magnetic plate 204 is slidably installed inside the circular groove 202, and a stop rod 205 is movably inserted into the center of the top surface of the threaded hollow cylinder 201, the bottom end of the stop rod 205 is fixedly connected to the middle of the top surface of the second magnetic plate 204.

[0023] In this embodiment, the buffer sealing assembly 1 includes a sealing body 101, an outer ring body 102 is provided on the outside of the sealing body 101, and an inner ring body 103 is provided on the inner surface of the sealing body 101.

[0024] The top surface of the sealing body 101 is provided with a buffer groove 104. Several threaded cylinders 105 are provided on the inner wall of the buffer groove 104 near the outer ring body 102. Several mating blocks 106 are provided on the inner wall of the buffer groove 104 near the inner ring body 103.

[0025] A plurality of the mating blocks 106 have an insertion interface 107 on one side, a clearance groove 108 is provided in the middle of the inner ring body 103, and a retaining ring 109 is provided at the bottom edge of the inner ring body 103.

[0026] The first magnetic plate 203 and the second magnetic plate 204 are arranged opposite each other with the same poles and mutually exclusive. Several threaded cylinders 105 correspond one-to-one with several threaded hollow cylinders 201. The top surface of each threaded cylinder 105 is provided with a threaded opening. The threaded hollow cylinder 201 is threadedly inserted into the threaded opening. Several abutment rods 205 correspond one-to-one with several insertion interfaces 107. The top end of the abutment rod 205 is movably inserted into the insertion interface 107. Under the action of the first magnetic plate 203 and the second magnetic plate 204, the abutment rod 205 will abut against the mating block 106, so that the inner lip can better fit with the piston rod surface. Even if deformation occurs, it can also play an auxiliary corrective role and improve the service life of the buffer seal.

[0027] Preferably, several abutting components 2 are arranged in a ring within the buffer groove 104 of the buffer sealing component 1, making the structure more reasonable.

[0028] In use, the upper protruding part of the inner ring body 103 is the inner lip. The inner lip can be held in place by the clamping component 2. When the piston rod operates, the inner ring body 103 is squeezed and deforms in the direction of the buffer groove 104. Under pressure, the inner lip of the inner ring body 103 will deform irregularly. At the same time, long-term deformation will eventually lead to permanent deformation of the inner lip, which will cause the buffer seal to fail to achieve a sealing effect. Therefore, the deformation of the inner lip can be made more regular by the movable insertion of the abutment rod 205 in the threaded hollow cylinder 201, reducing the irregularity of the deformation of the inner ring body 103. At the same time, under the action of the first magnetic plate 203 and the second magnetic plate 204, the abutment rod 205 will press against the docking block 106, so that the inner lip can fit better with the piston rod surface. Even if deformation occurs, it can play an auxiliary corrective role and improve the service life of the buffer seal.

[0029] In summary, the piston rod buffer seal can make the deformation of the inner lip more regular by moving the abutment rod 205 inside the threaded hollow cylinder 201, reducing the irregularity of the deformation of the inner ring body 103. At the same time, under the action of the first magnetic plate 203 and the second magnetic plate 204, the abutment rod 205 will abut against the mating block 106, so that the inner lip can better fit with the piston rod surface. Even if deformation occurs, it can also play an auxiliary corrective role, thereby improving the service life of the buffer seal.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piston rod buffer seal, comprising a buffer sealing assembly (1), characterized in that... The top surface of the buffer sealing assembly (1) is provided with a plurality of abutting assemblies (2); The clamping assembly (2) includes a threaded hollow cylinder (201), a circular groove (202) is provided inside the threaded hollow cylinder (201), a first magnetic plate (203) is fixedly installed on the bottom surface of the circular groove (202), a second magnetic plate (204) is slidably installed in the circular groove (202), a stop rod (205) is movably inserted at the center of the top surface of the threaded hollow cylinder (201), the bottom end of the stop rod (205) is fixedly connected to the middle of the top surface of the second magnetic plate (204), and the first magnetic plate (203) and the second magnetic plate (204) are arranged opposite each other with the same pole and mutually exclusive.

2. The piston rod buffer seal according to claim 1, characterized in that, The buffer sealing assembly (1) includes a sealing body (101), an outer ring (102) is provided on the outside of the sealing body (101), and an inner ring (103) is provided on the inner surface of the sealing body (101).

3. A piston rod buffer seal according to claim 2, characterized in that, The top surface of the sealing body (101) is provided with a buffer groove (104). Several threaded cylinders (105) are provided on the inner wall of the buffer groove (104) near the outer ring body (102). Several mating blocks (106) are provided on the inner wall of the buffer groove (104) near the inner ring body (103).

4. A piston rod buffer seal according to claim 3, characterized in that, A insertion interface (107) is provided on one side of several of the docking blocks (106), a clearance groove (108) is provided in the middle of the inner ring body (103), and a retaining ring (109) is provided at the bottom edge of the inner ring body (103).

5. A piston rod buffer seal according to claim 4, characterized in that, Several threaded cylinders (105) correspond one-to-one with several threaded hollow cylinders (201). The top surface of several threaded cylinders (105) is provided with threaded openings. The threaded hollow cylinders (201) are threadedly inserted into the threaded openings. Several push rods (205) correspond one-to-one with several insertion interfaces (107). The top end of the push rod (205) is movably inserted into the insertion interface (107).

6. A piston rod buffer seal according to claim 3, characterized in that, Several clamping components (2) are arranged in a ring within the buffer groove (104) of the buffer sealing component (1).

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