Novel piston rod assembly structure

Abstract

The invention belongs to the technical field of shock absorbers, and particularly relates to a novel piston rod assembly structure which comprises a piston rod, a hanging ring and a dust cover cap, a connecting column is arranged at the lower end of the hanging ring, and an inner hole allowing the upper end of the piston rod to stretch in and be connected is coaxially formed in the connecting column. The lower end of the connecting column is provided with an annular riveting lug which overhangs downwards, the lower end of the connecting column penetrates through a connecting hole of the dust cover cap, and the annular riveting lug is turned upwards to be riveted with the dust cover cap. The piston rod welding method is used for solving the technical problems that an existing piston rod is connected with a lifting ring and a dust cover cap in a welding mode, the requirements for the technology and welding equipment are high, the surface of the piston rod is prone to being damaged in the welding process, and the rejection rate is high.

Description

Technical Field

[0001] The invention belongs to the technical field of shock absorbers, and in particular relates to a novel piston rod assembly structure. Background Art

[0002] The conventional shock absorber piston rod assembly currently consists of three parts: the piston rod 3', the lifting ring 1' and the dust cover 2', which are connected by welding. The piston rod assembly usually requires two welds: the first weld 4' is formed by welding the lifting ring and the piston rod, and the second weld 5' is formed by welding the dust cover and the piston rod. The specific structure is as follows: Figure 1 However, the conventional connection method for the piston rod assembly requires two welding passes, which is not only complex but also requires specialized welding tooling and equipment. Furthermore, when welding the piston rod to the dust cover, welding spatter may fall onto the piston rod working area, potentially damaging the piston rod surface and increasing the scrap rate, while also risking oil leakage from the shock absorber. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a new piston rod assembly structure to solve the technical problem that the current piston rod is connected to the lifting ring and dust cover by welding, which not only has high requirements on the process and welding equipment, but also the welding process easily causes damage to the piston rod surface, resulting in a high scrap rate.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a new type of piston rod assembly structure, which includes a piston rod, a lifting ring and a dust cover. A connecting column is provided at the lower end of the lifting ring, and an inner hole for the upper end of the piston rod to extend into and connect is coaxially provided on the connecting column. A downwardly extending annular riveted ear is provided at the lower end of the connecting column. The lower end of the connecting column passes through the connecting hole of the dust cover, and the annular riveted ear is turned upward to achieve riveting with the dust cover.

[0005] Preferably, a step portion is provided on the connecting column above the annular riveted ear in the circumferential direction for limiting the position of the dust cover.

[0006] Preferably, the inner hole and the piston rod are connected by threads.

[0007] Preferably, a threaded column is provided at the upper end of the piston rod, and is connected to the inner hole through the threaded column.

[0008] Preferably, the diameter of the threaded column is smaller than that of the piston rod, forming a step limit.

[0009] Preferably, a thread locking agent coating is provided on the outer periphery of the threaded column.

[0010] The beneficial effects of adopting the technical solution of the present invention are: The piston rod and the dust cover are riveted instead of conventional welding, which simplifies the processing technology, avoids surface damage caused by welding spatter falling on the surface of the piston rod working area, and reduces the scrap rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of a piston rod assembly in the prior art; Figure 2 This is a schematic diagram of an embodiment of a novel piston rod assembly structure of the present application; Figure 3 This is a diagram of the lifting ring for this application; Figure 4 This is a schematic diagram of the piston rod of this application.

[0012] in, Figure 1-4 In the figure, 1'-lifting ring, 2'-dust cover, 3'-piston rod, 4'-first weld, 5'-second weld; 1-lifting ring, 2-dust cover, 3-piston rod, 31-threaded column, 32-second step, 4-connecting column, 41-first step, 42-inner hole, 5-annular riveting ear. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and do not limit the scope of the present invention.

[0014] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0016] The specific embodiments are as follows: Example 1, as Figure 1-4 As shown, a novel piston rod assembly structure includes a piston rod 3, a lifting ring 1 and a dust cover 2. A connecting hole is provided on the dust cover 2 for being sleeved on the piston rod 3 for connection.

[0017] A connecting post 4 is perpendicularly connected to the lower end of the lifting ring 1, used to connect the dust cover 2 and the piston rod 3. A coaxial inner hole 42 is provided on the connecting post 4, into which the upper end of the piston rod 3 extends for fixation, thereby connecting the piston rod 3 to the lifting ring 1. A downwardly extending annular riveted lug 5 is provided on the lower end surface of the connecting post 4. The dust cover 2 is mounted over the piston rod 3 and over the annular riveted lug 5. The lower end of the annular riveted lug 5 protrudes downwardly below the connection hole of the dust cover 2. The annular riveted lug 5 is then turned upward to achieve a riveted connection between the dust cover 2 and the connecting post 4.

[0018] Furthermore, a second step 41 is provided on the outer periphery of the connecting post 4. The second step 41 is provided above the annular riveted lug 5 and is used to limit the position of the dust cover 2 from above. The dust cover 2 is riveted to the connecting post 4 via the annular riveted lug 5 and, in conjunction with the second step 41, achieves a stable and reliable connection to the dust cover 2.

[0019] Furthermore, the upper end of the piston rod 3 extends into the inner hole 42 and is connected to the connecting column 4 by threaded engagement, which facilitates the installation and disassembly between the piston rod 3 and the lifting ring 1 without the need for special equipment, making the operation more convenient and quick.

[0020] Furthermore, a threaded column 31 is provided on the upper end of the piston rod 3 , and the threaded column 31 cooperates with the internal thread in the inner hole 42 on the connecting column 4 to achieve a threaded connection.

[0021] Furthermore, the outer diameter of the threaded column 31 is smaller than the outer diameter of the piston rod 3 , and a first step portion 32 is formed at the connection between the two to achieve position limiting when the piston rod 3 is connected to the connecting column 4 .

[0022] Furthermore, a threadlocker coating is applied to the outer circumference of the threaded column 31. Prior to connection, the threadlocker is applied to the outer circumference of the threaded column 31 and then tightened to a predetermined torque within the inner hole 42 of the connecting column 4 to ensure a secure connection. In this embodiment, the threadlocker is an adhesive composed of a (meth)acrylate, an initiator, a co-accelerator, a stabilizer (inhibitor), a dye, and a filler, all mixed in a predetermined ratio.

[0023] When a new type of piston rod assembly structure of this embodiment is in use, the piston rod 3 and the connecting column 4 are connected by the threaded cooperation between the threaded column 31 and the inner hole 42 to realize the connection between the piston rod 3 and the lifting ring 1; the dust cover 2 is set on the outside of the connecting column 4, and the annular riveted ear 5 is turned upward to realize the riveting between the dust cover 2 and the connecting column 4; at this point, the connection between the lifting ring 1, the dust cover 2 and the piston rod 3 is realized, and no welding is required during the connection process, so no special welding tooling and welding equipment are required, which simplifies the process; and, the problem of splashes generated during the welding of the dust cover and the piston rod in the prior art causing damage to the piston rod surface is avoided, thereby improving the yield rate.

[0024] Example 2, a new type of piston rod assembly structure, is different from the above-mentioned Example 1 in that the threaded column adopts a cylindrical body with a smooth surface, the inner hole on the connecting column adopts a hole with a smooth inner wall, and the hole is arranged to pass through from top to bottom. The upper end of the column extends out of the inner hole and is riveted to realize the riveting between the piston rod and the lifting ring, without the need for processing of internal and external threads. Other structures are not described here.

[0025] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A novel piston rod assembly structure, which includes a piston rod, a lifting ring and a dust cover, characterized in that: A connecting column is provided at the lower end of the lifting ring, and an inner hole for the upper end of the piston rod to extend into and connect is coaxially provided on the connecting column. A downwardly cantilevered annular riveted ear is provided at the lower end of the connecting column. The lower end of the connecting column passes through the connecting hole of the dust cover, and the annular riveted ear is turned upward to achieve riveting with the dust cover.

2. A novel piston rod assembly structure according to claim 1, characterized in that: The connecting column is provided with a step portion above the annular riveted ear in the circumferential direction for limiting the dust cover.

3. The novel piston rod assembly structure according to claim 1 is characterized in that: The inner hole and the piston rod are connected by threads.

4. A novel piston rod assembly structure according to claim 3, characterized in that: The upper end of the piston rod is provided with a threaded column, which is connected to the inner hole through the threaded column.

5. A novel piston rod assembly structure according to claim 4, characterized in that: The diameter of the threaded column is smaller than that of the piston rod, forming a step limit.

6. A novel piston rod assembly structure according to claim 5, characterized in that: A thread locking agent coating is provided on the outer periphery of the threaded column.

Images