Piston rod convenient to install

Abstract

The utility model relates to the technical field of piston rods, in particular to a convenient-to-install piston rod which comprises a main rod body and a friction sleeve, the friction sleeve is arranged outside the main rod body in a sleeving mode, the side wall of the main rod body is attached to the inner wall of the friction sleeve, and an outer conical thread is arranged at the end, located in the friction sleeve, of the main rod body. An outer conical thread is arranged in the friction sleeve, an inner conical thread matched with the outer conical thread is arranged in the friction sleeve, a fixing assembly is arranged between the main rod body and the friction sleeve, the fixing assembly is located on a non-friction section of the friction sleeve, and a sealing piece is arranged between the main rod body and the friction sleeve. The piston rod has the effects of improving the problem that the whole piston rod needs to be replaced when the surface of the piston rod is abraded and prolonging the service life.

Description

Technical Field

[0001] This utility model relates to the field of piston rod technology, and in particular to a piston rod that is easy to install. Background Technology

[0002] The friction surface of the piston rod is constantly in reciprocating motion during use. Once wear occurs on the piston rod surface in the machine, it may cause problems with the use of the entire piston rod, requiring complete replacement and resulting in a lot of cost waste. The most important factor in extending the service life is the quality of the base material, but the material is not easy to improve. The only solution is to try to change the structure of the piston rod to facilitate the replacement of worn parts and reduce costs. Utility Model Content

[0003] To address the issue of piston rods requiring complete replacement due to surface wear and to extend their service life, this application provides a piston rod that is easy to install.

[0004] The piston rod provided in this application, which is easy to install, adopts the following technical solution:

[0005] An easy-to-install piston rod includes a main rod body and a friction sleeve. The friction sleeve is sleeved on the outside of the main rod body, and the side wall of the main rod body is fitted to the inner wall of the friction sleeve. The end of the main rod body located inside the friction sleeve is provided with an external tapered thread, and the friction sleeve is provided with an internal tapered thread adapted to the external tapered thread. A fixing assembly is provided between the main rod body and the friction sleeve, and the fixing assembly is located in the non-friction section of the friction sleeve. A sealing element is provided between the main rod body and the friction sleeve.

[0006] Preferably, the fixing component includes a fixing bolt and a fixing nut, and both the main rod and the friction sleeve have blind holes for the fixing bolt to pass through. The fixing bolt is connected to the end of the fixing nut that passes through the friction sleeve and the main rod.

[0007] Preferably, the sealing element is a rubber sealing ring, and a groove is provided inside the friction sleeve. The groove is circular and located at the opening of the friction sleeve. The rubber sealing ring is embedded in the groove.

[0008] Preferably, the friction sleeve is made of gradient composite material, with an inner copper alloy wear-resistant layer, an outer plasma-sprayed Cr3C2-NiCr coating, and a gradient sintered structure in the transition zone.

[0009] In summary, this application includes the following beneficial technical effects:

[0010] This utility model provides an easy-to-install piston rod. By designing the piston rod into a split main body and a friction sleeve, maintenance only requires replacing the friction sleeve, avoiding the material waste caused by traditional whole-body replacement and reducing maintenance costs. The external tapered thread, internal tapered thread and fixing component enable quick disassembly and assembly between the main body and the friction sleeve, thereby improving the problem of piston rod surface wear requiring whole-body replacement and extending its service life. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the piston rod structure in the embodiments of this application, which is easy to install;

[0012] Figure 2 This is a schematic diagram of the internal structure of the friction sleeve in an embodiment of this application.

[0013] Explanation of reference numerals in the attached drawings: 1. Main rod body; 11. External tapered thread; 2. Friction sleeve; 21. Internal tapered thread; 3. Fixing assembly; 31. Fixing bolt; 32. Fixing nut; 4. Seal. Detailed Implementation

[0014] To enable those skilled in the art to better understand the present invention, the solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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 specific orientation structure and operation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0016] This application discloses a piston rod that is easy to install. (See also...) Figure 1 The piston rod, which is easy to install, includes a main rod body 1 and a friction sleeve 2. The friction sleeve 2 is sleeved on the outside of the main rod body 1. The side wall of the main rod body 1 is attached to the inner wall of the friction sleeve 2. The end of the main rod body 1 located inside the friction sleeve 2 is provided with an external tapered thread 11. The friction sleeve 2 is provided with an internal tapered thread 21 that is adapted to the external tapered thread 11. A fixing component 3 is provided between the main rod body 1 and the friction sleeve 2. The fixing component 3 is located in the non-friction section of the friction sleeve 2. A sealing element 4 is provided between the main rod body 1 and the friction sleeve 2.

[0017] By designing the piston rod as a split unit, consisting of the main rod body 1 and the friction sleeve 2, maintenance only requires replacing the friction sleeve 2, avoiding the material waste caused by traditional whole-unit replacement and reducing maintenance costs. The main rod body 1 and the friction sleeve can be quickly disassembled and assembled through the external tapered thread 11, the internal tapered thread 21 and the fixing component 3.

[0018] The fixing component 3 includes a fixing bolt 31 and a fixing nut 32. Both the main rod body 1 and the friction sleeve 2 are provided with blind holes for the fixing bolt 31 to pass through. The fixing bolt 31 is connected to the end of the fixing nut 32 that passes through the friction sleeve 2 and the main rod body 1.

[0019] The fixing bolt 31 is designed to pass through the blind hole between the main rod body 1 and the friction sleeve 2, applying axial preload and cooperating with the radial self-locking of the tapered thread to ensure that the connection does not loosen under high-frequency vibration.

[0020] The sealing element 4 is a rubber sealing ring. A groove is provided inside the friction sleeve 2. The groove is circular and located at the opening of the friction sleeve 2. The rubber sealing ring is embedded in the groove.

[0021] The embedded design of the rubber sealing ring and the groove, combined with the spiral sealing effect of the tapered thread, ensures the sealing between the main rod body 1 and the friction sleeve 2.

[0022] The friction sleeve 2 is made of gradient composite material, with a copper alloy wear-resistant layer on the inner side and a plasma-sprayed Cr3C2-NiCr coating on the outer side. The transition zone is a gradient sintered structure.

[0023] The friction sleeve 2 adopts a gradient composite structure of copper alloy wear-resistant layer (friction coefficient ≤0.12) and Cr3C2-NiCr coating (hardness ≥HV1100), which reduces the overall wear rate and extends the service life.

[0024] The implementation principle of the piston rod that is easy to install according to the embodiment of this application is as follows: When disassembling, simply loosen the fixing bolt 31 and the fixing nut 32, and then turn the friction sleeve 2 to pull out the friction sleeve 2 for replacement, which is convenient for disassembly and assembly.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A piston rod that is easy to install, characterized in that: The device includes a main rod body (1) and a friction sleeve (2). The friction sleeve (2) is sleeved on the outside of the main rod body (1). The side wall of the main rod body (1) is attached to the inner wall of the friction sleeve (2). The end of the main rod body (1) located inside the friction sleeve (2) is provided with an external tapered thread (11). The friction sleeve (2) is provided with an internal tapered thread (21) adapted to the external tapered thread (11). A fixing component (3) is provided between the main rod body (1) and the friction sleeve (2). The fixing component (3) is located in the non-friction section of the friction sleeve (2). A sealing element (4) is provided between the main rod body (1) and the friction sleeve (2).

2. The piston rod for easy installation according to claim 1, characterized in that: The fixing component (3) includes a fixing bolt (31) and a fixing nut (32). Both the main rod (1) and the friction sleeve (2) are provided with blind holes for the fixing bolt (31) to pass through. The fixing bolt (31) is connected to the end of the fixing nut (32) that passes through the friction sleeve (2) and the main rod (1).

3. The piston rod for easy installation according to claim 1, characterized in that: The sealing element (4) is a rubber sealing ring. A groove is provided inside the friction sleeve (2). The groove is arranged in a circular shape and is located at the opening of the friction sleeve (2). The rubber sealing ring is embedded in the groove.

4. The piston rod for easy installation according to claim 1, characterized in that: The friction sleeve (2) is made of gradient composite material, with a copper alloy wear-resistant layer on the inner side and a plasma-sprayed Cr3C2-NiCr coating on the outer side. The transition zone is a gradient sintered structure.

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