A wear-resistant structure for a piston rod of an automobile shock absorber

Abstract

The utility model relates to the technical field of piston rod and disclose a kind of wear-resistant structure for automobile shock absorber piston rod, including connector, the left side of the connector is provided with wear-resistant mechanism, the wear-resistant mechanism includes connecting rod, the connecting rod is fixedly connected to the left side of connector, the connecting rod left side is inserted with piston body, the periphery of the piston body is sleeved with sealing ring, the first limit shaft is connected with in the piston body, the periphery of the connecting rod is inserted with mounting seat, when using, by the wear-resistant mechanism set, the sealing ring of the periphery of piston body effectively prevents dust, impurity into shock absorber, reduce internal wear, telescopic rod and spring are constituted shock-absorbing buffer system in the mounting seat setting, two groups of symmetrical distribution buffer seat are through the elastic deformation of telescopic rod and spring, when piston body moves to stroke end, such as extend or retract limit position, buffer seat will first contact cylinder end cover or other limit components.

Description

Technical Field

[0001] This utility model relates to the field of piston rod technology, specifically a wear-resistant structure for piston rods of automotive shock absorbers. Background Technology

[0002] In the automotive industry, shock absorbers are key components of vehicle suspension systems, and their performance directly affects the vehicle's ride comfort, stability, and safety. As the core component of shock absorbers, piston rods need to undergo frequent reciprocating motion during shock absorber operation. Therefore, the wear resistance, impact resistance, and reliability of piston rods are particularly important.

[0003] Currently, there are some problems with the piston rod of the existing automotive shock absorber that need to be solved in actual use. On the one hand, when the piston is working for a long time, it is prone to serious wear due to frequent friction with the cylinder block and other components. This will not only reduce the performance of the shock absorber, but also significantly shorten its service life. On the other hand, when the piston rod drives the piston to the end of its stroke, the piston often has a rigid impact with the cylinder end cap or other limiting components. This rigid impact will not only generate a lot of noise and vibration, but also damage related components, further affecting the normal operation of the shock absorber.

[0004] According to the description in the patent announcement of a wear-resistant automotive shock absorber piston rod (authorization announcement number: CN219045536U), the wear-resistant automotive shock absorber piston rod includes "piston rod body, guide, etc." to achieve wear resistance.

[0005] Regarding the above description, the applicant believes the following issues exist:

[0006] This wear-resistant automotive shock absorber piston rod utilizes the piston rod body and guide to achieve wear resistance. During use, a buffer ring slides onto the piston rod body and is positioned between the guide and the limiting ring. This allows the limiting ring to reduce collisions or wear between the guide and the limiting ring. The rubber pad on the buffer ring has a relatively fixed elastic modulus and can only absorb limited impact energy through its own deformation. When the vibration frequency is high or the impact force is large (such as when a vehicle drives over potholes), the rubber pad cannot quickly complete the "compression-rebound" cycle, resulting in residual vibration energy and a decrease in protection and vibration damping effects. Therefore, improvements to this piston rod are necessary. Utility Model Content

[0007] The purpose of this invention is to provide a wear-resistant structure for automotive shock absorber piston rods to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant structure for a piston rod of an automotive shock absorber, including a connector, wherein a wear-resistant mechanism is provided on the left side of the connector;

[0009] The wear-resistant mechanism includes a connecting rod, which is fixedly connected to the left side of the connector. A piston body is inserted into the left side of the connecting rod. A sealing ring is sleeved around the piston body. A first limiting shaft is threaded inside the piston body. A mounting base is inserted into the outer side of the connecting rod. Telescopic rods are fixedly connected to the upper and lower sides of the mounting base. A connecting block is fixedly connected to the top of the telescopic rod. A buffer seat is fixedly connected to the top of the connecting block. The buffer seat is located around the connecting rod. A spring is sleeved around the telescopic rod. The top of the spring is fixedly connected to the bottom of the connecting block. The bottom of the spring is fixedly connected to the mounting base. A second limiting shaft is threaded inside the mounting base.

[0010] Preferably, the right side of the first limiting shaft extends through the inside of the connecting rod, and the connecting block is slidably connected to the inside of the mounting base, which facilitates the stability between the piston body and the connecting rod through the first limiting shaft, and also facilitates installation and disassembly.

[0011] Preferably, the top of the buffer seat is provided with a rubber pad, and the inner side of the buffer seat is in contact with the outer side of the connecting rod. The spring is made of spring steel, which allows the spring to buffer the buffer seat and thus protect the piston body during movement.

[0012] Preferably, the mounting base, buffer base, connecting block, telescopic rod, and spring are provided in two sets and symmetrically distributed on the front and rear sides of the connecting rod, further improving the comprehensive protection of the piston body.

[0013] Preferably, the second limiting shaft passes through the interior of both sets of mounting seats and the interior of the connecting rod, so as to ensure the stability between the two sets of mounting seats and the connecting rod through the second limiting shaft.

[0014] Preferably, the connecting rod includes a support layer, a reinforcing layer is fixedly connected to the periphery of the support layer, a wear-resistant layer is fixedly connected to the periphery of the reinforcing layer, and a protective layer is fixedly connected to the periphery of the wear-resistant layer.

[0015] Preferably, the support layer is the innermost layer, which is made of alloy structural steel, and the protective layer is the outermost layer, which is coated with molybdenum disulfide solid lubricant. This facilitates the provision of a stable foundation through the alloy structural steel of the support layer, and the molybdenum disulfide solid lubricant coating on the outermost layer forms a low-friction coefficient protective film. The synergistic effect of multiple protections significantly reduces the wear rate of the connecting rod and extends the service life of the automotive shock absorber.

[0016] Compared with the prior art, this utility model provides a wear-resistant structure for automotive shock absorber piston rods, which has the following beneficial effects:

[0017] 1. The piston rod of this automotive shock absorber uses a wear-resistant structure. Through the wear-resistant mechanism, the sealing ring sleeved around the piston body effectively prevents dust and impurities from entering the shock absorber, reducing internal wear. The telescopic rod and spring installed in the mounting seat constitute a shock absorption and buffer system. Two sets of symmetrically distributed buffer seats, through the elastic deformation of the telescopic rod and spring, when the piston body moves to the end of its stroke, such as when it extends or retracts to its limit position, the buffer seat will first contact the cylinder end cover or other limiting components, and then compress the telescopic rod and spring through the connecting block. Through the elastic deformation of the spring, the kinetic energy of the piston body is converted into elastic potential energy, avoiding rigid impact between the piston body and the cylinder, thereby reducing equipment noise and vibration. The mounting seat is connected to the connecting rod through the second limiting shaft, which facilitates replacement and maintenance during subsequent use. The threaded connection design of the first and second limiting shafts makes the assembly and disassembly of the piston body, mounting seat and other components with the connecting rod convenient, facilitating later maintenance, repair and component replacement.

[0018] 2. The piston rod of this automotive shock absorber uses a wear-resistant structure, consisting of a support layer, a reinforcement layer, a wear-resistant layer, and a protective layer. The innermost support layer is made of alloy structural steel, providing basic strength and rigidity for the connecting rod and bearing axial loads and alternating stresses. The reinforcement layer, located around the support layer, is made of copper alloy, enhancing overall strength. The wear-resistant layer, located around the reinforcement layer, is made of hard chrome-plated material. When the connecting rod, connected to the piston body, reciprocates frequently in the hydraulic cylinder, the wear-resistant layer effectively resists friction between the piston and cylinder, reducing surface wear and extending the service life of the connecting rod. The outermost protective layer is coated with molybdenum disulfide solid lubricant. When the piston rod reciprocates in the hydraulic cylinder, the molybdenum disulfide lubricating film effectively reduces frictional resistance between the piston and seals and guide sleeves, reducing energy loss. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the wear-resistant mechanism.

[0022] Figure 3This is a schematic diagram of the left side structure of the connecting rod;

[0023] Figure 4 This is a schematic diagram of the outer structure of the connecting rod;

[0024] Figure 5 This is a schematic diagram of the internal structure of the mounting base;

[0025] Figure 6 This is a schematic diagram of the layered structure of the connecting rod material.

[0026] In the diagram: 1. Connector; 2. Wear-resistant mechanism; 3. Support layer; 4. Reinforcing layer; 5. Wear-resistant layer; 6. Protective layer; 21. Connecting rod; 22. Mounting seat; 23. Piston body; 24. Sealing ring; 25. First limiting shaft; 26. Second limiting shaft; 27. Buffer seat; 28. Connecting block; 29. ​​Telescopic rod; 291. Spring. Detailed Implementation

[0027] 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.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] This utility model provides the following technical solution:

[0030] Example 1

[0031] Please see Figure 1-6 This utility model provides a technical solution: a wear-resistant structure for a piston rod of an automotive shock absorber, including a connector 1, and a wear-resistant mechanism 2 is provided on the left side of the connector 1;

[0032] The wear-resistant mechanism 2 includes a connecting rod 21, which is fixedly connected to the left side of the connector 1. A piston body 23 is inserted into the left side of the connecting rod 21. A sealing ring 24 is sleeved around the piston body 23. A first limiting shaft 25 is threaded inside the piston body 23. A mounting base 22 is inserted into the outer side of the connecting rod 21. Telescopic rods 29 are fixedly connected to the upper and lower sides inside the mounting base 22. A connecting block 28 is fixedly connected to the top of the telescopic rod 29. A buffer seat 27 is fixedly connected to the top of the connecting block 28. The buffer seat 27 is located around the connecting rod 21. A spring 291 is sleeved around the telescopic rod 29. The top of the spring 291 is fixedly connected to the bottom of the connecting block 28. The bottom of the spring 291 is fixedly connected to the mounting base 22. A second limiting shaft 26 is threaded inside the mounting base 22.

[0033] The first limiting shaft 25 extends through the inside of the connecting rod 21 on the right side, and the connecting block 28 is slidably connected to the inside of the mounting base 22, so as to ensure the stability between the piston body 23 and the connecting rod 21 through the first limiting shaft 25, and at the same time facilitate installation and disassembly.

[0034] A rubber pad is provided on the top of the buffer seat 27, and the inner side of the buffer seat 27 is in contact with the outer side of the connecting rod 21. The spring 291 is made of spring steel, which facilitates the buffer seat 27 to play a buffering role, thereby protecting the piston body 23 when it moves. There are two sets of mounting seat 22, buffer seat 27, connecting block 28, telescopic rod 29 and spring 291, which are symmetrically distributed on the front and rear sides of the connecting rod 21, further improving the comprehensive protection of the piston body 23.

[0035] The second limiting shaft 26 passes through the interior of both sets of mounting seats 22 and the interior of the connecting rod 21, facilitating the stability between the two sets of mounting seats 22 and the connecting rod 21 through the second limiting shaft 26.

[0036] Example 2

[0037] Please see Figure 1-6 Furthermore, based on Embodiment 1, the connecting rod 21 further includes a support layer 3, a reinforcing layer 4 fixedly connected to the periphery of the support layer 3, a wear-resistant layer 5 fixedly connected to the periphery of the reinforcing layer 4, and a protective layer 6 fixedly connected to the periphery of the wear-resistant layer 5. The support layer 3 is the innermost layer and is made of alloy structural steel. The protective layer 6 is the outermost layer and is coated with molybdenum disulfide solid lubricant, which facilitates the provision of a stable foundation for the alloy structural steel of the support layer 3. The molybdenum disulfide solid lubricant coated on the outermost layer forms a low-friction coefficient protective film. The multiple protective effects work together to significantly reduce the wear rate of the connecting rod 21 and extend the service life of the automotive shock absorber.

[0038] In actual operation, when this device is used, firstly, the piston body 23 is inserted into the left side of the connecting rod 21, and the stability between the connecting rod 21 and the piston body 23 is ensured by the first limiting shaft 25. Then, the two sets of mounting seats 22 are respectively inserted into the front and rear sides of the periphery of the connecting rod 21, and the second limiting shaft 26 passes through the two sets of mounting seats 22 and the connecting rod 21 to ensure the stability between the three. Finally, the connecting rod 21, the piston body 23 and the shock absorber are assembled.

[0039] The telescopic rod 29 and spring 291 inside the mounting base 22 constitute a shock absorption and buffer system. Two sets of symmetrically distributed buffer seats 27, through the elastic deformation of the telescopic rod 29 and spring 291, when the piston body 23 moves to the end of its stroke, such as when it extends or retracts to its limit position, the buffer seats 27 will first contact the cylinder end cover or other limiting components, and squeeze the telescopic rod 29 and spring 291 through the connecting block 28. Through the elastic deformation of the spring 291, the kinetic energy of the piston body 23 is converted into elastic potential energy, avoiding rigid impact between the piston body 23 and the cylinder, thereby reducing equipment noise and vibration. The mounting base 22 is connected to the connecting rod 21 through the second limiting shaft 26, which facilitates replacement and maintenance during subsequent use. The threaded connection design of the first limiting shaft 25 and the second limiting shaft 26 makes the assembly and disassembly of the piston body 23, mounting base 22 and other components with the connecting rod 21 convenient, facilitating later maintenance, repair and component replacement.

[0040] The innermost support layer 3 is made of alloy structural steel and provides basic strength and rigidity for the connecting rod 21, bearing axial loads and alternating stresses. The reinforcing layer 4 is located around the support layer 3 and is made of copper alloy to improve overall strength. The wear-resistant layer 5 is located around the reinforcing layer 4 and is made of hard chrome plating. When the connecting rod 21, which is connected to the piston body 23, reciprocates frequently in the hydraulic cylinder, the wear-resistant layer 5 can effectively resist the friction between the piston and the cylinder, reduce surface wear, and extend the service life of the connecting rod 21. The outermost protective layer 6 is sprayed with molybdenum disulfide solid lubricant. When the piston rod reciprocates in the hydraulic cylinder, the molybdenum disulfide lubricating film can effectively reduce the frictional resistance between the piston and the seals and guide sleeves, reducing energy loss.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A wear-resistant structure for a piston rod of an automotive shock absorber, comprising a connector (1), characterized in that: A wear-resistant mechanism (2) is provided on the left side of the connector (1); The wear-resistant mechanism (2) includes a connecting rod (21), which is fixedly connected to the left side of the connector (1). A piston body (23) is inserted into the left side of the connecting rod (21). A sealing ring (24) is sleeved around the piston body (23). A first limiting shaft (25) is threaded inside the piston body (23). A mounting seat (22) is inserted into the outer side of the connecting rod (21). Telescopic rods (29) are fixedly connected to the upper and lower sides inside the mounting seat (22). A connecting block (28) is fixedly connected to the top of the telescopic rod (29). A buffer seat (27) is fixedly connected to the top of the connecting block (28). The buffer seat (27) is located around the connecting rod (21). A spring (291) is sleeved around the outer side of the telescopic rod (29). The top of the spring (291) is fixedly connected to the bottom of the connecting block (28). The bottom of the spring (291) is fixedly connected to the mounting seat (22). A second limiting shaft (26) is threaded inside the mounting seat (22).

2. The wear-resistant structure for an automotive shock absorber piston rod according to claim 1, characterized in that: The right side of the first limiting shaft (25) extends through the inside of the connecting rod (21), and the connecting block (28) is slidably connected to the inside of the mounting base (22).

3. The wear-resistant structure for an automotive shock absorber piston rod according to claim 1, characterized in that: The buffer seat (27) is provided with a rubber pad on top, and the inner side of the buffer seat (27) is in contact with the outer side of the connecting rod (21). The spring (291) is made of spring steel.

4. The wear-resistant structure for an automotive shock absorber piston rod according to claim 1, characterized in that: The mounting base (22), buffer base (27), connecting block (28), telescopic rod (29) and spring (291) are provided in two sets and are symmetrically distributed on the front and rear sides of the connecting rod (21).

5. The wear-resistant structure for an automotive shock absorber piston rod according to claim 1, characterized in that: The second limiting shaft (26) passes through the interior of the two sets of mounting seats (22) and through the interior of the connecting rod (21).

6. The wear-resistant structure for an automotive shock absorber piston rod according to claim 1, characterized in that: The connecting rod (21) includes a support layer (3), a reinforcing layer (4) is fixedly connected to the periphery of the support layer (3), a wear-resistant layer (5) is fixedly connected to the periphery of the reinforcing layer (4), and a protective layer (6) is fixedly connected to the periphery of the wear-resistant layer (5).

7. A wear-resistant structure for an automotive shock absorber piston rod according to claim 6, characterized in that: The support layer (3) is the innermost layer, and the support layer (3) is made of alloy structural steel. The protective layer (6) is the outermost layer, and the outermost layer is coated with molybdenum disulfide solid lubricant.

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