Piston rod for air cylinder

Abstract

The piston rod for the air cylinder comprises a cylinder body and a piston assembly, the piston assembly comprises a rod body and a piston arranged at the end of the rod body, permanent magnet rings are embedded in the upper end face and the lower end face of the piston, and second permanent magnet rings corresponding to the permanent magnet rings are embedded in the inner walls of the upper end and the lower end of the cylinder body. The opposite magnetisms of the permanent magnet ring and the second permanent magnet ring are the same, and the permanent magnet ring is used for realizing magnetic buffering operation; the rod body and the piston are fixed together through a fixing assembly, and a piston cavity meeting the requirement for reciprocating motion of the piston is formed in the cylinder body. The piston and the rod body are fixed through the bolt, so that subsequent replacement and maintenance operation can be met, and the overall maintenance cost can be saved; meanwhile, the magnetic buffering assemblies are designed between the two sides of the piston and the cylinder body, in the up-down movement process of the piston, non-contact buffering operation is achieved through repulsive force of the same polarity between magnets, abrasion to the piston can be reduced, and therefore the overall service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of cylinders, in particular to a piston rod for a cylinder. 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 pneumatic cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements.

[0003] At present, the piston and piston ring of the piston rod of the existing cylinder are mostly fixedly connected, which is inconvenient to replace and repair, and both ends of the piston are directly in contact with the inner cavity of the cylinder, and most of them have no buffer mechanism. In this way, the frequent back and forth movement of the piston rod will cause the two ends of the piston to collide frequently with the two ends of the inner wall of the cylinder, which causes serious wear on the piston, thereby affecting the overall service life.

[0004] In view of this, a piston rod for a cylinder is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a piston rod for a cylinder in order to solve the above-mentioned problems.

[0006] The technical solution adopted by the utility model is as follows: a piston rod for a cylinder, comprising a cylinder body and a piston assembly, the piston assembly comprising a rod body and a piston arranged at the end of the rod body, the upper and lower end faces of the piston are both embedded with permanent magnetic rings, the upper and lower end inner walls of the cylinder body are embedded with second permanent magnetic rings corresponding to the permanent magnetic rings, the relative magnetic properties of the permanent magnetic ring and the second permanent magnetic ring are the same, and are used to realize magnetic buffering operation; the rod body and the piston are fixed together by a fixing assembly.

[0007] In a preferred embodiment, the interior of the cylinder body has a piston cavity that satisfies the reciprocating motion of the piston, and one end of the rod body extends out of the cylinder body and is formed with a threaded mounting surface.

[0008] In a preferred embodiment, a Gly seal ring is embedded in the middle outer end surface of the piston, and the outer end surface of the Gly seal ring fits into the inner wall of the cylinder body.

[0009] In a preferred embodiment, the upper and lower end walls of the cylinder body are also embedded with a silicone pad extending at one end.

[0010] In a preferred embodiment, the fixing assembly includes a fixing bolt and a spring, a through hole is formed through the middle of the piston, a threaded hole is tapped at the lower end of the rod body, and the spring is arranged in the threaded hole.

[0011] In a preferred embodiment, a limiting ring is integrally provided on the lower end face of the rod body, and the diameter of the limiting ring is larger than the diameter of the through hole. When the piston is sleeved on the rod body, the upper end of the piston abuts against the bottom end face of the limiting ring, and the fixing bolt is threadedly installed in the threaded hole. When the fixing bolt is installed in the threaded hole, the bolt head of the fixing bolt abuts against the lower end face of the piston.

[0012] In a preferred embodiment, positioning protrusions are formed on both sides of the lower end of the limiting ring, and a groove for the positioning protrusions to extend into is correspondingly formed on the upper end surface of the piston. A V-shaped sealing ring that fits the inner wall of the cylinder body is also embedded on the piston.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] 1. In the utility model, the piston and the rod body are fixed with bolts, so that subsequent replacement and maintenance operations can be met, and only a single part needs to be replaced during replacement, which can save overall maintenance costs;

[0015] 2. In the utility model, a magnetic buffer assembly is designed between the two sides of the piston and the cylinder body. During the up and down movement of the piston, the contactless buffer operation is realized by the repulsive force of the same polarity between the magnets, which can reduce the wear on the piston itself and thus improve the overall service life;

[0016] 3. In the present invention, a Gley seal ring is additionally designed on the piston, and the Gley seal ring has the two-in-one functions of wear resistance and elastic sealing, thereby reducing the wear when the piston moves up and down, thereby increasing the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional plan structure of the utility model as a whole;

[0018] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at a in the middle;

[0019] Figure 3 The figure is a schematic diagram of the three-dimensional structure after the fixed components in the utility model are disassembled.

[0020] Markings in the figure: 1-cylinder body, 2-rod body, 3-threaded mounting surface, 4-two permanent magnetic rings, 5-permanent magnetic ring, 6-Glay sealing ring, 7-piston, 8-spring, 9-silicone pad, 10-fixing bolt, 11-limiting ring, 12-piston chamber, 13-positioning protrusion, 14-V-shaped sealing ring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] Reference Figure 1-3 A piston rod for a cylinder comprises a cylinder body 1 and a piston assembly, wherein the piston assembly comprises a rod body 2 and a piston 7 arranged at the end of the rod body 2, the upper and lower end surfaces of the piston 7 are both embedded with permanent magnetic rings 5, the upper and lower end inner walls of the cylinder body 1 are embedded with second permanent magnetic rings 4 corresponding to the permanent magnetic rings 5, the relative magnetic properties of the permanent magnetic rings 5 ​​and the second permanent magnetic rings 4 are the same, and are used to realize magnetic buffering operation, and magnetic buffering assemblies are designed between the two sides of the piston 7 and the cylinder body 1, and in the process of the up and down movement of the piston 7, the contactless buffering operation is realized by the repulsive force of the same sex between the second permanent magnetic ring 4 and the permanent magnetic ring 5, which can reduce the wear on the piston 7 itself, thereby improving the overall service life.

[0023] Furthermore, the interior of the cylinder body 1 has a piston chamber 12 that satisfies the reciprocating motion of the piston 7. One end of the rod body 2 extends outside the cylinder body 1 and forms a threaded mounting surface 3, which can be connected to other equipment that requires transmission through the threaded mounting surface 3, which will not be described in detail here.

[0024] Furthermore, a Glydine seal ring 6 is embedded in the middle outer end face of the piston 7, and the outer end face of the Glydine seal ring 6 is fitted in the inner wall of the cylinder body 1. The Glydine seal ring 6 replaces the traditional O-ring. The anti-wear part of the Glydine seal ring 6 plays an anti-wear role and is not easy to wear during use. It is not easy to wear while ensuring the sealing performance, thereby effectively extending the service life of the entire structure.

[0025] Furthermore, the rod body 2 and the piston 7 are fixed together by a fixing assembly, which includes a fixing bolt 10 and a spring 8. A through hole is opened through the middle of the piston 7, and a threaded hole is tapped at the lower end of the rod body 2. The spring 8 is arranged in the threaded hole. After the fixing bolt 10 is tightened, the added spring 8 can increase the connecting force and locking force with the fixing bolt 10, so as to achieve a certain anti-slip and anti-loosening effect, thereby improving the fixing effect of the piston 7.

[0026] Furthermore, a silicone pad 9 extending from one end is embedded in the upper and lower end walls of the cylinder body 1 . The added silicone pad 9 can provide additional buffering and protection when the piston 7 contacts the inner wall of the cylinder body 1 from top to bottom.

[0027] Furthermore, a limiting ring 11 is integrally provided on the lower end surface of the rod body 2, and the diameter of the limiting ring 11 is larger than the diameter of the through hole. When the piston 7 is sleeved on the rod body 2, the upper end of the piston 7 abuts against the bottom end surface of the limiting ring 11, and the fixing bolt 10 is threadedly installed in the threaded hole. When the fixing bolt 10 is installed in the threaded hole, the bolt head of the fixing bolt 10 abuts against the lower end surface of the piston 7. The bolt head and the limiting ring 7 can assist in limiting the installation position of the piston 7, thereby ensuring the accuracy of the installation of the piston 7.

[0028] Furthermore, positioning protrusions 13 are protruded from both sides of the lower end of the limiting ring 11, and a groove for the positioning protrusion 13 to extend into is correspondingly formed on the upper end surface of the piston 7. A V-shaped sealing ring 14 that fits the inner wall of the cylinder body 1 is also embedded on the piston 7. The position of the piston 7 can be limited by the groove and the positioning protrusion 13 to avoid the self-rotation of the piston 7.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A piston rod for a cylinder, comprising a cylinder body and a piston assembly, characterized in that: The piston assembly includes a rod body and a piston arranged at the end of the rod body. The upper and lower end surfaces of the piston are embedded with permanent magnetic rings. The inner walls of the upper and lower ends of the cylinder body are embedded with second permanent magnetic rings corresponding to the permanent magnetic rings. The relative magnetic properties of the permanent magnetic ring and the second permanent magnetic ring are the same, so as to realize magnetic buffering operation. The rod body and the piston are fixed together by a fixing assembly.

2. A cylinder piston rod as claimed in claim 1, characterized in that: The cylinder body has a piston cavity inside to meet the reciprocating motion of the piston, and one end of the rod body extends out of the cylinder body and is formed with a threaded mounting surface.

3. A piston rod for a cylinder as claimed in claim 1, characterized in that: A Gly seal ring is embedded in the middle outer end surface of the piston, and the outer end surface of the Gly seal ring is fitted in the inner wall of the cylinder body.

4. A piston rod for a cylinder as claimed in claim 1, characterized in that: The upper and lower end walls of the cylinder body are also embedded with a silicone pad with one end extending out.

5. A cylinder piston rod as claimed in claim 1, characterized in that: The fixing assembly includes a fixing bolt and a spring. A through hole is formed in the middle of the piston. A threaded hole is tapped at the lower end of the rod body. The spring is arranged in the threaded hole.

6. A piston rod for a cylinder as claimed in claim 5, characterized in that: The lower end surface of the rod body is integrally provided with a limiting ring, the diameter of the limiting ring is larger than the diameter of the through hole, when the piston is sleeved on the rod body, the upper end of the piston abuts against the bottom end surface of the limiting ring, the fixing bolt is threadedly installed in the threaded hole, and when the fixing bolt is installed in the threaded hole, the bolt head of the fixing bolt abuts against the lower end surface of the piston.

7. A piston rod for a cylinder as claimed in claim 6, characterized in that: Positioning protrusions are protruded from both sides of the lower end of the limiting ring, and a groove for the positioning protrusions to extend into is correspondingly opened on the upper end surface of the piston. A V-shaped sealing ring that fits the inner wall of the cylinder body is also embedded on the piston.

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