Hydraulic cylinder piston assembly with self-lubricating function

Abstract

The utility model discloses a hydraulic cylinder piston assembly with a self-lubricating function, which relates to the technical field of hydraulic cylinders and comprises a hydraulic cylinder mechanism, the hydraulic cylinder mechanism consists of a cylinder body assembly and a piston assembly main body, the piston assembly main body is in sliding insertion connection with the cylinder body assembly, and the side surface of the cylinder body assembly is respectively provided with a pushing assembly and an oil supply mechanism. When the piston assembly body slides up and down, a fixing plate, a connecting rod and a push plate of the push assembly are driven to move synchronously, the push plate extrudes an oil storage tank to enable an elastic cavity to deform, and lubricating oil is injected into an oil storage groove of the lubricating assembly through internal pressure via a second connecting pipe in cooperation with backflow prevention of a second one-way valve. The oil storage holes can store lubricating oil and continuously supplement the oil storage grooves, it is guaranteed that a lubricating oil film always exists on the friction face when the piston assembly body and the cylinder assembly slide, and dry friction is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder piston assembly with self-lubricating function. Background Technology

[0002] The hydraulic cylinder piston assembly is the core component of a hydraulic cylinder. It is typically assembled from parts such as a piston, piston rod, seals, and guide rings. As a key link in energy conversion within a hydraulic system, the hydraulic cylinder piston assembly uses the pressure of hydraulic oil to drive the piston, thereby achieving linear reciprocating motion or oscillation at a certain angle. It provides power output for various types of machinery in fields such as engineering machinery, machine tools, and the automotive industry, meeting the force and motion control requirements under different working conditions.

[0003] However, in existing technologies, the lubrication structure needs to continuously rely on hydraulic oil as a medium. When the hydraulic oil system leaks, the loss of hydraulic oil leads to insufficient oil volume, making it impossible to form a complete oil film. Alternatively, oil contamination can introduce impurities, damaging the stability of the oil film and scratching the friction surfaces. These situations make it difficult for the friction surfaces to obtain continuous lubrication, which can easily lead to dry friction. The large amount of heat and friction generated by dry friction will aggravate the wear of components such as pistons and cylinders, especially affecting key components such as seals. Due to lack of lubrication, seals fail quickly, reducing their sealing performance and ultimately seriously affecting the normal operation and service life of the hydraulic cylinder piston assembly, and may even lead to the paralysis of the entire hydraulic system. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a hydraulic cylinder piston assembly with self-lubricating function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic cylinder piston assembly with self-lubricating function, comprising a hydraulic cylinder mechanism, the hydraulic cylinder mechanism being composed of a cylinder body assembly and a piston assembly body, the piston assembly body being slidably connected to the cylinder body assembly, a pushing assembly and an oil supply mechanism being respectively installed on the side of the cylinder body assembly, the pushing assembly being located above the oil supply mechanism, the oil supply mechanism including an oil reservoir and a first connecting pipe, an elastic cavity being provided in the middle of the oil reservoir, and a second connecting pipe being fixedly connected to the bottom of the oil reservoir, the second connecting pipe being fixedly connected to the cylinder body assembly, the first connecting pipe being fixedly connected to the oil reservoir, a lubrication assembly being fixedly connected to the bottom of the piston assembly body, the lubrication assembly including a base, an oil reservoir being provided on the surface of the base, and an oil storage hole being provided on the surface of the base, the oil storage hole being located inside the oil reservoir.

[0006] Preferably, the pushing component includes a fixed plate, which is fixedly connected to the piston assembly body, and a connecting rod is fixedly connected to the bottom of the fixed plate, and a push plate is fixedly connected to the bottom of the connecting rod.

[0007] Preferably, a connecting bracket is fixedly connected to the side of the cylinder block assembly, and the connecting rod is slidably inserted into the connecting bracket.

[0008] Preferably, a first check valve is fixedly connected to the surface of the first connecting pipe, and a second check valve is fixedly connected to the surface of the second connecting pipe.

[0009] Preferably, the oil storage tank has multiple oil storage holes arranged in a ring array inside, with the ends of the oil storage holes facing downwards.

[0010] Preferably, the oil tank is equipped with a telescopic rod, which is fixedly connected to the upper and lower ends of the oil tank, and the surface of the telescopic rod is equipped with a spring, the two ends of which are fixedly connected to the upper and lower ends of the oil tank.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, when the piston assembly body slides up and down, it drives the fixed plate, connecting rod and push plate of the push assembly to move synchronously. The push plate squeezes the oil storage tank to deform the elastic cavity. Using the internal pressure, through the No. 2 connecting pipe and the No. 2 check valve to prevent backflow, the lubricating oil is injected into the oil storage tank of the lubrication assembly. The oil storage hole can store the lubricating oil and continuously replenish the oil storage tank, ensuring that there is always a lubricating oil film on the friction surface when the piston assembly body slides with the cylinder assembly, effectively avoiding dry friction. At the same time, the No. 1 check valve ensures that the oil storage tank stably draws oil through the No. 1 connecting pipe, forming a circulating oil supply, reducing the dependence on the system hydraulic oil, reducing the risk of wear caused by leakage and contamination, extending the life of key components such as the sealing ring, and improving the operating stability of the hydraulic cylinder piston assembly and the reliability of the overall hydraulic system.

[0013] 2. In this utility model, adaptive pressure balance and intelligent oil supply control are achieved through the synergistic action of the elastic cavity, telescopic rod, and spring: when the push plate moves upward, the three components restore their deformation, allowing the oil tank to draw in air through the No. 1 connecting pipe in conjunction with the No. 1 one-way valve to balance the pressure and ensure smooth replenishment of lubricating oil; when the oil tank and oil storage hole are full of lubricating oil, the No. 2 connecting pipe is blocked, and the elastic cavity absorbs the pressure through its own expansion, avoiding system overload. This ensures continuous lubrication of the friction surface and prevents excessive lubricating oil from causing leakage or waste, significantly improving the stability and reliability of the self-lubricating system, reducing maintenance frequency, and extending component life. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a hydraulic cylinder piston assembly with self-lubricating function is provided for this utility model.

[0015] Figure 2 This utility model provides a three-dimensional cross-sectional structural diagram of the cylinder body assembly in a hydraulic cylinder piston assembly with self-lubricating function.

[0016] Figure 3 This utility model provides a front view of the cross-sectional structure of the oil reservoir in a hydraulic cylinder piston assembly with self-lubricating function;

[0017] Figure 4 This invention presents a cross-sectional front view of the lubrication component in a hydraulic cylinder piston assembly with self-lubrication function.

[0018] Legend: 1. Hydraulic cylinder mechanism; 11. Cylinder body assembly; 12. Piston assembly body; 2. Pushing assembly; 21. Fixing plate; 22. Connecting rod; 23. Push plate; 24. Connecting frame; 3. Oil supply mechanism; 31. Oil reservoir; 32. Elastic cavity; 33. No. 1 connecting pipe; 34. No. 1 check valve; 35. No. 2 connecting pipe; 36. No. 2 check valve; 37. Telescopic rod; 38. Spring; 4. Lubrication assembly; 41. Base; 42. Oil reservoir; 43. Oil reservoir hole. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: As Figures 1-4 As shown, this utility model provides a hydraulic cylinder piston assembly with self-lubricating function, including a hydraulic cylinder mechanism 1. The hydraulic cylinder mechanism 1 is composed of a cylinder body assembly 11 and a piston assembly body 12. The piston assembly body 12 is slidably inserted into the cylinder body assembly 11. A pushing assembly 2 and an oil supply mechanism 3 are respectively installed on the side of the cylinder body assembly 11. The pushing assembly 2 is located above the oil supply mechanism 3. The oil supply mechanism 3 includes an oil storage tank 31 and a first connecting pipe 33. An elastic cavity 32 is provided in the middle of the oil storage tank 31, and a second connecting pipe 35 is fixedly connected to the bottom of the oil storage tank 31. The second connecting pipe 35 is fixedly connected to the cylinder body assembly 11, and the first connecting pipe 33 is fixedly connected to the oil storage tank 31. A lubrication assembly 4 is fixedly connected to the bottom of the piston assembly body 12. The lubrication assembly 4 includes a base 41. An oil storage groove 42 is provided on the surface of the base 41, and an oil storage hole 43 is provided on the surface of the base 41. The oil storage hole 43 is located inside the oil storage groove 42.

[0022] The push assembly 2 includes a fixed plate 21, which is fixedly connected to the piston assembly body 12. A connecting rod 22 is fixedly connected to the bottom of the fixed plate 21, and a push plate 23 is fixedly connected to the bottom of the connecting rod 22. A connecting bracket 24 is fixedly connected to the side of the cylinder assembly 11. The connecting rod 22 and the connecting bracket 24 are slidably inserted into each other. A first one-way valve 34 is fixedly connected to the surface of the first connecting pipe 33, and a second one-way valve 36 is fixedly connected to the surface of the second connecting pipe 35. The oil reservoir 42 has multiple oil storage holes 43 arranged in a ring array inside, with the ends of the oil storage holes 43 facing downwards.

[0023] The specific settings and functions of this embodiment are described below. When the piston assembly body 12 slides up and down along the cylinder assembly 11, the piston assembly body 12 will drive the fixing plate 21 to move up and down. At the same time, the lubrication assembly 4 at the bottom of the piston assembly body 12 moves downward. During the downward movement of the fixing plate 21, the connecting rod 22 slides along the connecting frame 24, driving the push plate 23 to squeeze the top of the oil storage tank 31. At this time, the elastic cavity 32 deforms, and the telescopic rod 37 and spring 38 deform. At the same time, the pressure inside the oil storage tank 31 increases. The lubricating oil stored inside the oil storage tank 31 is sprayed into the oil storage groove 42 on the surface of the base 41 through the second connecting pipe 35. The lubricating oil enters the storage hole 43 through the conduction part of the oil storage groove 42. When the piston assembly body 12 moves up and down, the lubricating oil in the oil storage groove 42 has a lubricating effect. At the same time, the lubricating oil stored in the oil storage hole 43 can continuously replenish the lubricating oil in the oil storage groove 42.

[0024] When the piston assembly body 12 slides up and down, it drives the fixed plate 21, connecting rod 22 and push plate 23 of the push assembly 2 to move synchronously. The push plate 23 squeezes the oil reservoir 31 to deform the elastic cavity 32. Using the internal pressure, through the second connecting pipe 35, and with the second check valve 36 to prevent backflow, the lubricating oil is injected into the oil reservoir 42 of the lubrication assembly 4. The oil reservoir hole 43 can store the lubricating oil and continuously replenish the oil reservoir 42, ensuring that there is always a lubricating oil film on the friction surface when the piston assembly body 12 slides with the cylinder assembly 11, effectively avoiding dry friction. At the same time, the first check valve 34 ensures that the oil reservoir 31 stably draws oil through the first connecting pipe 33, forming a circulating oil supply, reducing the dependence on the system hydraulic oil, reducing the risk of wear caused by leakage and contamination, extending the life of key components such as the sealing ring, and improving the operating stability of the hydraulic cylinder piston assembly and the reliability of the overall hydraulic system.

[0025] Example 2: Figure 2 and Figure 3 As shown, an elastic cavity 32 is provided in the middle of the oil tank 31, and a telescopic rod 37 is provided inside the oil tank 31. The telescopic rod 37 is fixedly connected to the upper and lower ends of the oil tank 31 respectively, and a spring 38 is provided on the surface of the telescopic rod 37. The two ends of the spring 38 are fixedly connected to the upper and lower ends of the oil tank 31 respectively.

[0026] The overall effect of this embodiment is that when the push plate 23 moves upward, the elastic cavity 32, the telescopic rod 37, and the spring 38 return to their original deformation. Air enters the oil tank 31 through the first connecting pipe 33, balancing the pressure inside the oil tank 31 and preparing for the replenishment of lubricating oil. When the oil supply mechanism 3 injects lubricating oil into the oil reservoir 42 again, when the lubricating oil inside the oil reservoir 42 and the oil reservoir hole 43 is sufficient, the elastic cavity 32 deforms, and the second connecting pipe 35 cannot inject lubricating oil between the cylinder assembly 11 and the base 41. The elastic cavity 32 expands to balance the pressure, facilitating stable use of the whole system.

[0027] The adaptive pressure balance and intelligent oil supply control are achieved through the coordinated action of the elastic cavity 32, the telescopic rod 37, and the spring 38: when the push plate 23 moves upward, the three components restore their deformation, allowing the oil tank 31 to draw in air through the first connecting pipe 33 in conjunction with the first one-way valve 34 to balance the pressure and ensure that the lubricating oil can be replenished smoothly; when the oil reservoir 42 and the oil storage hole 43 are full of lubricating oil, the second connecting pipe 35 is blocked, and the elastic cavity 32 absorbs the pressure through its own expansion, avoiding system overload. This ensures continuous lubrication of the friction surface and prevents excessive lubricating oil from causing leakage or waste, significantly improving the stability and reliability of the self-lubricating system, reducing maintenance frequency, and extending component life.

[0028] The usage and working principle of this device are as follows: When the piston assembly body 12 slides up and down along the cylinder assembly 11, the piston assembly body 12 will drive the fixed plate 21 to move up and down. At the same time, the lubrication assembly 4 at the bottom of the piston assembly body 12 moves downward. During the downward movement of the fixed plate 21, the connecting rod 22 slides along the connecting frame 24, driving the push plate 23 to squeeze the top of the oil tank 31. At this time, the elastic cavity 32 deforms, and the telescopic rod 37 and spring 38 deform. At the same time, the pressure inside the oil tank 31 increases. The lubricating oil stored inside the oil tank 31 is sprayed into the oil storage groove 42 on the surface of the base 41 through the second connecting pipe 35. The lubricating oil enters the storage hole 43 through the conduction part of the oil storage groove 42. When the piston assembly body 12 moves up and down, the lubricating oil in the oil storage groove 42 has a lubricating effect. At the same time, the lubricating oil stored in the oil storage hole 43 can continuously replenish the lubricating oil in the oil storage groove 42.

[0029] When the push plate 23 moves upward, the elastic cavity 32, the telescopic rod 37, and the spring 38 return to their original deformation. Air enters the oil reservoir 31 through the first connecting pipe 33 to balance the pressure inside the oil reservoir 31, preparing for the replenishment of lubricating oil. When the oil supply mechanism 3 injects lubricating oil into the oil reservoir 42 again, when the lubricating oil inside the oil reservoir 42 and the oil reservoir hole 43 is sufficient, the elastic cavity 32 deforms, and the second connecting pipe 35 cannot inject lubricating oil between the cylinder assembly 11 and the base 41. The elastic cavity 32 expands to balance the pressure, facilitating the stable use of the whole.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A hydraulic cylinder piston assembly with self-lubricating function, comprising a hydraulic cylinder mechanism (1), wherein the hydraulic cylinder mechanism (1) is composed of a cylinder body assembly (11) and a piston assembly body (12), wherein the piston assembly body (12) is slidably inserted into the cylinder body assembly (11), characterized in that: The cylinder assembly (11) is equipped with a push assembly (2) and an oil supply mechanism (3) on its side. The push assembly (2) is located above the oil supply mechanism (3). The oil supply mechanism (3) includes an oil tank (31) and a first connecting pipe (33). An elastic cavity (32) is provided in the middle of the oil tank (31), and a second connecting pipe (35) is fixedly connected to the bottom of the oil tank (31). The second connecting pipe (35) is fixedly connected to the cylinder assembly (11), and the first connecting pipe (33) is fixedly connected to the oil tank (31). A lubrication assembly (4) is fixedly connected to the bottom of the piston assembly body (12). The lubrication assembly (4) includes a base (41). An oil storage groove (42) is provided on the surface of the base (41), and an oil storage hole (43) is provided on the surface of the base (41). The oil storage hole (43) is located inside the oil storage groove (42).

2. The hydraulic cylinder piston assembly with self-lubricating function according to claim 1, characterized in that: The pushing component (2) includes a fixing plate (21), which is fixedly connected to the piston assembly body (12), and a connecting rod (22) is fixedly connected to the bottom of the fixing plate (21), and a push plate (23) is fixedly connected to the bottom of the connecting rod (22).

3. A hydraulic cylinder piston assembly with self-lubricating function according to claim 2, characterized in that: The cylinder assembly (11) is fixedly connected to a connecting frame (24) on its side, and the connecting rod (22) is slidably inserted into the connecting frame (24).

4. A hydraulic cylinder piston assembly with self-lubricating function according to claim 1, characterized in that: A first-way valve (34) is fixedly connected to the surface of the first connecting pipe (33), and a second-way valve (36) is fixedly connected to the surface of the second connecting pipe (35).

5. A hydraulic cylinder piston assembly with self-lubricating function according to claim 1, characterized in that: The oil storage tank (42) has a ring array of multiple oil storage holes (43) inside, with the ends of the oil storage holes (43) facing downwards.

6. A hydraulic cylinder piston assembly with self-lubricating function according to claim 1, characterized in that: The oil storage tank (31) is equipped with a telescopic rod (37) inside. The telescopic rod (37) is fixedly connected to the upper and lower ends of the oil storage tank (31) respectively. A spring (38) is provided on the surface of the telescopic rod (37). The two ends of the spring (38) are fixedly connected to the upper and lower ends of the oil storage tank (31) respectively.

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