A cylinder structure provided with an oil injection mechanism

CN224771288UActive Publication Date: 2026-09-18WUXI LITWEI AUTOMATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202522782812.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-12-29
Publication Date
2026-09-18
Estimated Expiration
2035-12-29

AI Technical Summary

Technical Problem

针对现有技术的不足,本实用新型提供了一种设有注油机构的缸体结构,解决了现有技术中冷未设置自润滑机构导致的润滑度不足、核心部件长期磨损加速、摩擦系数上升、运行噪音增大、丝杆表面点蚀磨损、传动精度下降、核心部件使用寿命缩短、维护成本高、停机风险大、维护需拆解电动缸且时间较长等问题

Benefits of technology

本实用新型通过设置自动供油机构,实现了对缸体内部运动部件的持续、稳定润滑,有效解决了现有技术中因润滑不足导致的一系列问题,极大地降低了维护成本和停机风险,减少了维护时间。同时,持续的润滑供给能够显著降低摩擦系数,有效避免了运行噪音增大的问题,减缓了丝杆等核心部件表面的点蚀和磨损,保证了传动精度,延长了核心部件的使用寿命。

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Abstract

The utility model discloses a kind of cylinder body structures with oil injection mechanism, it is related to cylinder lubricating technical field.The cylinder body structure with oil injection mechanism, including piston cylinder, the piston cylinder is provided with electromagnetic commutating mechanism and automatic oil supply mechanism, the piston cylinder is provided with cylinder body, the piston is arranged inside the cylinder body, the piston is connected with push rod, the push rod is fixed with fixed nut piston, the automatic oil supply mechanism is provided with inlet pressure pipe, the inlet pressure pipe is connected with guide pipe, the guide pipe is internally provided with oil control valve block, the oil control valve block is connected with oil control spring, the guide pipe tail end is connected with spring bottom block, the guide pipe side lower side is connected with lubricating oil tank, the spring bottom plate is arranged inside the lubricating oil tank lower side, three oil inlet springs are connected on the spring bottom plate upper end, the oil inlet spring upper end is connected with piston top plate, the lubricating oil tank upper end is provided with one-way oil inlet valve.
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Description

Technical Field

[0001] This utility model relates to the field of cylinder lubrication technology, specifically to a cylinder structure equipped with an oil injection mechanism. Background Technology

[0002] In the actual use of a cylinder block, there are many moving parts inside, such as the piston and piston rod. These parts inevitably generate friction as they reciprocate or rotate within the cylinder. To reduce the adverse effects of this friction and minimize wear, continuous lubrication of these moving parts is essential. Only in this way can the cylinder block be effectively kept in normal operating condition, significantly extending its service life and enabling it to stably perform its intended function for a longer period.

[0003] For example, patent number CN 219549261 U provides a cylinder structure, which includes a cylinder component having a flow channel and a sealing port communicating with the flow channel; a sealing component for installation at the sealing port of the cylinder component; and a guide component connected to the cylinder component, one end of which has a first opening communicating with the sealing port, and the other end of which has a second opening; the guide component includes a guide channel for guiding the sealing component, the guide channel being located between the first and second openings, so that the sealing component can reach the first opening from the second opening through the guide channel. The cylinder structure of this utility model solves the problem of seal damage caused when replacing the sealing component in the prior art, and the installation of the sealing component is more convenient.

[0004] For example, patent number CN 214247658 U provides a cylinder structure. This utility model addresses the problem of low stability and easy detachment of copper bushings in existing cold-pressing methods by providing a cylinder structure including a cylinder body and a bushing, and further including a pressure-applying component with internal hydraulic lines. The bushing's machined holes include interconnected connecting holes and expansion holes. The cylinder body holes have different depths and sizes, and the bushing's outer diameter is clearance-fitted to the cylinder body hole's inner diameter. This utility model uses connecting holes and expansion holes with different inner diameters for the bushing's machined holes, ensuring that the bushing expands to a larger end diameter corresponding to the cylinder body hole's inner diameter, thus preventing the bushing from easily detaching.

[0005] The aforementioned patent lacks a self-lubricating mechanism, leading to insufficient lubrication and accelerated wear of core components over time. Short-term consequences include increased friction coefficient and increased operating noise; long-term consequences include pitting and wear on the lead screw surface, decreased transmission accuracy, and shortened lifespan of core components. Maintenance costs are high, downtime risk is significant, and the electric cylinder must be disassembled for replacement or addition, resulting in lengthy maintenance times. Utility Model Content

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a cylinder structure equipped with an oil injection mechanism, which solves the problems in existing technologies such as insufficient lubrication due to the lack of a self-lubricating mechanism, accelerated long-term wear of core components, increased friction coefficient, increased operating noise, pitting wear on the lead screw surface, decreased transmission accuracy, shortened service life of core components, high maintenance costs, high downtime risk, and the need for disassembly of the electric cylinder for maintenance, which takes a long time.

[0007] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a cylinder structure with an oil injection mechanism, comprising a piston cylinder, wherein the piston cylinder is equipped with an electromagnetic reversing mechanism and an automatic oil supply mechanism, the piston cylinder is provided with a cylinder body, a piston is provided inside the cylinder body, the piston is connected to a push rod, the push rod is fixed by a piston with a fixing nut, the automatic oil supply mechanism is provided with a pressure inlet pipe, the pressure inlet pipe is connected to a guide pipe, an oil control valve block is provided inside the guide pipe, the oil control valve block is connected to an oil control spring, a spring base block is connected to the tail end of the guide pipe, a lubricating oil tank is connected to the lower side of the guide pipe, a spring base plate is provided inside the lower part of the lubricating oil tank, three oil inlet springs are connected to the upper end of the spring base plate, a piston top plate is connected to the upper end of the oil inlet springs, and a one-way oil inlet valve is provided at the upper end of the lubricating oil tank.

[0008] Preferably, the upper end of the cylinder is provided with an upper cover plate, and a sealing ring is provided between the upper cover plate and the push rod. The lower end of the cylinder is provided with a lower cover plate. The upper cover plate and the lower cover plate are each connected to a reversing interface. The front end of the cylinder is provided with an oil injection pipe, and the other end of the oil injection pipe is connected to the upper side of the guide pipe.

[0009] Preferably, a reversing groove is provided on the side of the cylinder block, a reversing block is provided inside the reversing groove, the reversing block is connected to a connecting frame, and permanent magnets are connected to the upper and lower ends of the connecting frame.

[0010] Preferably, a reversing cover is connected to the right end of the reversing slot, an upper electromagnetic coil body is provided at the upper end of the reversing cover, a lower electromagnetic coil body is provided at the lower end of the reversing cover, pressure guiding pipes are provided at the upper and lower ends of the reversing slot, and a reversing interface is connected to the other end of the pressure guiding pipe.

[0011] (III) Beneficial Effects This utility model provides a cylinder structure equipped with an oil injection mechanism. It has the following beneficial effects: This invention, by incorporating an automatic lubrication mechanism, achieves continuous and stable lubrication of the moving parts inside the cylinder, effectively solving a series of problems caused by insufficient lubrication in existing technologies. This significantly reduces maintenance costs and downtime risks, and shortens maintenance time. Simultaneously, continuous lubrication significantly reduces the coefficient of friction, effectively preventing increased operating noise, mitigating pitting and wear on the surfaces of core components such as the lead screw, ensuring transmission accuracy, and extending the service life of core components.

[0012] This device is based on an improvement of existing equipment, so the improvement cost is relatively low and it will not cause a large amount of existing equipment to be discarded. It ensures the processing effect while reducing the investment in improvement costs, making it suitable for large-scale production. Attached Figure Description

[0013] Figure 1 A schematic diagram of a cylinder block structure equipped with an oil injection mechanism; Figure 2 This is a front sectional view of the cylinder block structure equipped with an oil injection mechanism; Figure 3 This is a sectional view (BB) of a cylinder block structure equipped with an oil injection mechanism; Figure 4 This is a CC sectional view of a cylinder block structure equipped with an oil injection mechanism; Figure 5 This is a sectional view of the cylinder block structure equipped with an oil injection mechanism (DD).

[0014] In the diagram: 1. Piston cylinder; 11. Cylinder; 12. Piston; 13. Push rod; 14. Fixing nut; 15. Lower cover plate; 16. Upper cover plate; 17. Sealing ring; 18. Oil injection pipe; 2. Electromagnetic reversing mechanism; 21. Reversing groove; 22. Reversing block; 23. Connecting frame; 24. Permanent magnet; 25. Reversing cover; 26. Upper electromagnetic coil body; 27. Lower electromagnetic coil body; 28. Pressure guide pipe; 29. ​​Reversing interface; 3. Automatic oil supply mechanism; 31. Pressure inlet pipe; 32. Guide pipe; 33. Oil control valve block; 34. Oil control spring; 35. Spring base block; 36. Lubricating oil tank; 361. One-way oil inlet valve; 37. Spring base plate; 38. Oil inlet spring; 39. Piston top plate. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-5This utility model provides a technical solution: a cylinder structure with an oil injection mechanism, including a piston cylinder 1, wherein the piston cylinder 1 is provided with an electromagnetic reversing mechanism 2 and an automatic oil supply mechanism 3, the piston cylinder 1 is provided with a cylinder body 11), the upper end of the cylinder body 11 is provided with an upper cover plate 16, a sealing ring 17 is provided between the upper cover plate 16 and the push rod 13, and the lower end of the cylinder body 11 is provided with a lower cover plate 15, and the upper cover plate 16 and the lower cover plate 15 are each connected to a... The cylinder body 11 has a reversing interface 29. An oil injection pipe 18 is located at the front end of the cylinder body 11, with the other end of the oil injection pipe 18 connected to the upper side of the guide pipe 32. A reversing groove 21 is located on the side of the cylinder body 11, and a reversing block 22 is located inside the reversing groove 21. A connecting frame 23 is connected to the reversing block 22, and permanent magnets 24 are connected to the upper and lower ends of the connecting frame 23. A reversing cover 25 is connected to the right end of the reversing groove 21, and an upper electromagnetic coil body 26 is located on the upper end of the reversing cover 25. The reversing cover 25 has a lower electromagnetic coil body 27 at its lower end. The reversing groove 21 has pressure guide pipes 28 at both ends. The other end of the pressure guide pipes 28 is connected to a reversing interface 29. The cylinder body 11 has a piston 12 inside. The piston is connected to a push rod 13. The push rod 13 is fixed by a piston with a fixing nut 14. The automatic oil supply mechanism 3 has a pressure inlet pipe 31. The pressure inlet pipe 31 is connected to a guide pipe 32. The guide pipe 32 has an oil control valve block 33 inside. The oil control valve block 33 is connected to an oil control spring 34. The tail end of the guide pipe 32 is connected to a spring bottom block 35. The lower side of the guide pipe 32 is connected to a lubricating oil tank 36. The lower part of the lubricating oil tank 36 has a spring bottom plate 37 inside. The upper end of the spring bottom plate 37 is connected to three oil inlet springs 38. The upper end of the oil inlet springs 38 is connected to a piston top plate 39. The upper end of the lubricating oil tank 36 has a one-way oil inlet valve 361.

[0017] During operation, the middle part of the reversing groove 21 is connected to the air pump, and the compressed air generated by the air pump enters through the reversing groove 21. When the piston 12 needs to move upward, the upper electromagnetic coil body 26 is energized to generate magnetic force, attracting the permanent magnet 24 at the upper end of the connecting frame 23, which drives the reversing block 22 to move upward. At this time, the reversing block 22 opens the channel of the lower pressure guide pipe 28, and the compressed air enters the reversing interface 29 of the lower cover plate 15 through the lower pressure guide pipe 28, and then enters the lower cavity of the cylinder 11, pushing the piston 12 to move upward. The gas in the upper cavity of the piston 12 is discharged through the reversing interface 29 of the upper cover plate 16, the upper pressure guide pipe 28 and the reversing groove 21. During this process, if the piston 12 is not sufficiently lubricated, friction increases. To maintain the movement of the push rod 13, the air pressure needs to be increased. When the air pressure increases to a certain value, some compressed air enters the guide tube 32 through the pressure inlet pipe 31, pushing the oil control valve block 33 to overcome the elastic force of the oil control spring 34 and move towards the spring base block 35, opening the channel between the guide tube 32 and the lubricating oil tank 36. The piston top plate 39 in the lubricating oil tank 36 applies upward pressure under the action of the oil inlet spring 38, forcing the lubricating oil into the guide tube 32 through the opened channel. Subsequently, the lubricating oil enters the front end of the cylinder 11 through the oil injection pipe 18, lubricating the contact surface between the piston 12 and the inner wall of the cylinder 11. The one-way oil inlet valve 361 is used to replenish lubricating oil from the outside when the oil level in the lubricating oil tank 36 is insufficient, ensuring the continuous operation of the automatic oil supply mechanism 3. In this way, automatic lubrication of the piston cylinder 1 during operation is achieved, eliminating the need for frequent disassembly and maintenance.

[0018] In summary, this invention, by incorporating an automatic lubrication mechanism, achieves continuous and stable lubrication of the moving parts inside the cylinder, effectively solving a series of problems caused by insufficient lubrication in existing technologies. This significantly reduces maintenance costs and downtime risks, and shortens maintenance time. Simultaneously, continuous lubrication significantly reduces the coefficient of friction, effectively preventing increased operating noise, mitigating pitting and wear on the surfaces of core components such as the lead screw, ensuring transmission accuracy, and extending the service life of core components.

[0019] 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 process, method, article, or apparatus.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cylinder structure with an oil injection mechanism, comprising a piston cylinder (1), wherein the piston cylinder (1) is provided with an electromagnetic reversing mechanism (2) and an automatic oil supply mechanism (3), wherein the piston cylinder (1) is provided with a cylinder body (11), wherein a piston (12) is provided inside the cylinder body (11), wherein the piston is connected to a push rod (13), wherein the push rod (13) is fixed to the piston by a fixing nut (14), characterized in that: The automatic oil supply mechanism (3) is provided with a pressure inlet pipe (31), the pressure inlet pipe (31) is connected to a guide pipe (32), the guide pipe (32) is provided with an oil control valve block (33), the oil control valve block (33) is connected to an oil control spring (34), the tail end of the guide pipe (32) is connected to a spring base block (35), the lower side of the guide pipe (32) is connected to a lubricating oil tank (36), the lower inside of the lubricating oil tank (36) is provided with a spring base plate (37), the upper end of the spring base plate (37) is connected to three oil inlet springs (38), the upper end of the oil inlet springs (38) is connected to a piston top plate (39), and the upper end of the lubricating oil tank (36) is provided with a one-way oil inlet valve (361).

2. The cylinder block structure with an oil injection mechanism according to claim 1, characterized in that: The cylinder body (11) is provided with an upper cover plate (16) at the upper end, and a sealing ring (17) is provided between the upper cover plate (16) and the push rod (13). The cylinder body (11) is provided with a lower cover plate (15) at the lower end. The upper cover plate (16) and the lower cover plate (15) are each connected to a reversing interface (29). The cylinder body (11) is provided with an oil injection pipe (18) at the front end, and the other end of the oil injection pipe (18) is connected to the upper side of the guide pipe (32).

3. The cylinder structure with an oil injection mechanism according to claim 1, characterized in that: A reversing groove (21) is provided on the side of the cylinder body (11), and a reversing block (22) is provided inside the reversing groove (21). The reversing block (22) is connected to a connecting frame (23), and permanent magnets (24) are connected to the upper and lower ends of the connecting frame (23).

4. A cylinder block structure with an oil injection mechanism according to claim 3, characterized in that: The right end of the reversing slot (21) is connected to a reversing cover (25). The upper end of the reversing cover (25) is provided with an upper electromagnetic coil body (26), and the lower end of the reversing cover (25) is provided with a lower electromagnetic coil body (27). The upper and lower ends of the reversing slot (21) are provided with pressure guiding pipes (28), and the other end of the pressure guiding pipes (28) is connected to a reversing interface (29).

Citation Information

Patent Citations

  • Cylinder structure

    CN219549261U