Air cylinder with built-in cache structure

Abstract

The utility model discloses an air cylinder with a built-in buffer structure, which relates to the technical field of air cylinders and comprises a cylinder barrel, a piston rod, a piston and a buffer rod, the piston rod is positioned in the cylinder barrel, the piston is fixed at the top of the piston rod, the buffer rod is mounted in the piston, and tooth holes are respectively arranged on the outer side surfaces of the upper end and the lower end of the piston. Buffering teeth are arranged at the positions, corresponding to the tooth holes, of the two ends of the inner surface of the cylinder barrel, and limiting blocks are installed at the tail ends of the buffering teeth, namely the surfaces of the positions, close to the tail end of the cylinder barrel, of the buffering teeth. Multiple buffering is combined, a multiple protection mechanism of a buffering system is formed, the failure rate is effectively reduced, and long-term stable operation of the air cylinder is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of cylinder technology, and in particular relates to a cylinder with a built-in buffer structure. Background Technology

[0002] In modern industrial production, cylinders, as a common actuator, are widely used in automated production lines, machining equipment, packaging machinery, and many other fields. They convert the energy of compressed air into mechanical energy, achieving linear reciprocating motion and providing power support for various devices. With the continuous improvement of industrial automation, the requirements for cylinder performance and stability are becoming increasingly stringent. High-efficiency, stable, and durable cylinders have become key factors in ensuring production efficiency and product quality.

[0003] Currently, common cylinders are relatively traditional in their structural design. Most cylinders rely solely on simple seals and basic piston-rod structures to achieve reciprocating motion, often with weak cushioning design. Some cylinders only have simple rubber buffer pads at the cylinder end, and this single cushioning method has limited effectiveness. When the piston moves at high speed, as it approaches the cylinder bottom or cylinder head, the buffer pad cannot fully absorb the piston's kinetic energy, causing the piston to directly impact the cylinder body, generating significant impact force and noise. This not only affects the normal operation of the equipment but also causes severe wear on the cylinder seals, cylinder inner wall, and other components, greatly shortening the cylinder's service life. Furthermore, due to the lack of effective cushioning and balancing design, the cylinder is prone to vibration under frequent start-stop and high-speed operation conditions, affecting the accuracy and stability of equipment operation, thereby reducing production efficiency and increasing equipment maintenance costs.

[0004] In summary, existing cylinders have significant shortcomings in terms of cushioning performance, failing to meet the ever-increasing demands of modern industry. Developing a cylinder with a highly efficient cushioning structure that can improve operational stability and extend service life is urgently needed. Utility Model Content

[0005] To achieve the above objectives, this utility model proposes a cylinder with a built-in buffer structure, including a cylinder barrel, a piston rod, a piston, and a buffer rod. The piston rod is located inside the cylinder barrel, a piston is fixed to the top of the piston rod, and a buffer rod is installed inside the piston.

[0006] The outer surface of the piston is provided with toothed holes, which are located at the upper and lower ends of the piston. The inner surface of the cylinder is provided with buffer teeth at positions corresponding to the toothed holes. A limiting block is installed on the end of the buffer teeth, i.e., the surface of the buffer teeth near the end of the cylinder.

[0007] In one example, the buffer tooth is composed of multiple sets of teeth connected together.

[0008] In one example, an end cap is installed on the top of the cylinder, the piston rod passes through the end cap and extends into the cylinder, the end cap is provided with a sealing device, and a piston is fixedly installed on the top of one end of the piston rod that extends into the cylinder.

[0009] In one example, a seal is fitted over the outside of the piston.

[0010] In one example, the interior of the piston is penetrated by a buffer rod, which is fixed parallel to the side of the piston and is evenly distributed around the center of the piston's cross-section.

[0011] In one example, the outermost part of the buffer rod is an outer cylinder, and a partition is fixedly installed at the center of the outer cylinder. The two sides of the partition are respectively fixedly connected to one end of a spring, and the other end of the spring is fixedly connected to one end of a telescopic rod. The other end of the telescopic rod is fixedly connected to an impact block.

[0012] In one example, the outer cylinder is a hollow cylindrical structure.

[0013] In one example, the spring is not under force and the length of the telescopic rod is greater than 1 / 2 of the length of the outer cylinder.

[0014] The cylinder with a built-in buffer structure proposed in this utility model can bring the following beneficial effects:

[0015] 1. This utility model, through the ingenious cooperation of the toothed hole and the buffer tooth, and the tight cooperation between the limiting block and the buffer tooth, ensures that the piston has a certain buffering effect when it approaches the bottom of the cylinder, avoids the piston directly hitting the bottom of the cylinder, makes the piston stable and reliable during movement, and at the same time reduces the impact on the bottom of the cylinder, reduces noise, and extends the service life of the cylinder.

[0016] 2. This invention further optimizes the dynamic balance of the cylinder through the buffering effect of the internal spring of the buffer rod, improving working efficiency and stability, reducing maintenance costs, and ensuring that the cylinder can operate efficiently and stably under various working conditions. Furthermore, the symmetrical design of the buffer rod not only improves the smoothness of piston movement but also enhances the overall structural strength of the cylinder, enabling it to maintain excellent performance even under high-pressure environments. The multiple protection mechanisms of the buffer system effectively reduce the failure rate and ensure long-term stable operation of the cylinder. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of a cylinder with a built-in buffer structure according to the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a cylinder with a built-in buffer structure, excluding the cylinder barrel.

[0020] Figure 3 This is a schematic diagram of the piston structure of a cylinder with a built-in buffer structure according to the present invention.

[0021] Figure 4 This is a schematic diagram of the buffer rod structure of a cylinder with a built-in buffer structure according to the present invention.

[0022] Figure 5 This is a schematic diagram of the buffer tooth structure of a cylinder with a built-in buffer structure according to the present invention.

[0023] The attached figures are labeled as follows:

[0024] 1. Cylinder; 2. End cap; 3. Piston; 4. Piston rod; 5. Seal; 6. Buffer tooth; 7. Tooth hole; 8. Limiting block; 9. Buffer rod; 901. Outer cylinder; 902. Telescopic rod; 903. Spring; 904. Baffle; 905. Impact block. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this utility model, a detailed description is provided below with reference to the accompanying drawings.

[0026] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", 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 are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a communication 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] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

[0030] like Figures 1-5 As shown, an embodiment of this utility model proposes a cylinder with a built-in buffer structure, which includes a cylinder barrel 1, a piston rod 4, a piston 3, and a buffer rod 9. The piston rod 4 is located inside the cylinder barrel 1, and the piston 3 is fixed to the top of the piston rod 4. The buffer rod 9 is installed inside the piston 3.

[0031] An end cap 2 is installed on the top of cylinder 1. Piston rod 4 passes through end cap 2 and extends into cylinder 1. End cap 2 is equipped with a sealing device to ensure the internal sealing of the cylinder. A piston 3 is fixedly installed on the top of the end of piston rod 4 that extends into cylinder 1. A seal 5 is fitted on the outside of piston 3. When compressed air enters the rodless chamber of the cylinder through the air passage system, the gas pressure acts on one side of piston 3, generating a thrust. This thrust causes piston 3 to overcome various resistances, including the load force connected to piston rod 4, the friction between piston 3 and cylinder 1, and the resistance of seal 5, thereby pushing piston 3 to move along the axis of cylinder 1 towards the rod chamber. At the same time, piston rod 4 extends, driving the external load to move linearly. While piston 3 moves, the gas in the rod chamber is discharged into the atmosphere through the exhaust port. When the cylinder needs to return to the initial position, compressed air switches to the rod chamber, and the rodless chamber exhausts. The gas pressure in the rod chamber pushes piston 3 towards the rodless chamber, and piston rod 4 retracts, completing one working cycle.

[0032] Toothed holes 7 are provided on the outer surfaces of both the upper and lower ends of the piston 3. Buffer teeth 6 are provided on the inner surfaces of the cylinder 1 at positions corresponding to the toothed holes 7. Each buffer tooth 6 is composed of multiple sets of teeth connected together and has a certain length. As the piston 3 moves towards one end of the cylinder, the toothed holes 7 and buffer teeth 6 gradually mesh. The meshing process between the buffer teeth 6 and the toothed holes 7 is smooth, effectively reducing vibration during movement, improving cylinder operation stability, mitigating impact force, and extending service life. A limiting block 8 is installed at the end of the buffer tooth 6, near the end of the cylinder 1. The limiting block 8 can limit the extreme position of the piston 3, preventing excessive movement of the piston 3 and impact on the cylinder 1. The bottom of the piston 3 is not damaged. The limiting block 8 and the buffer tooth 6 fit tightly together to ensure that the piston 3 has a certain buffering effect when it approaches the bottom of the cylinder, so as to avoid the piston 3 directly hitting the bottom of the cylinder and making the piston 3 stable and reliable during operation. At the same time, it reduces the impact on the bottom of the cylinder, reduces noise, and extends the service life of the cylinder. The buffer tooth 6 is made of deformable materials such as rubber, which can effectively absorb the impact force without affecting the normal movement of the piston 3. The limiting block 8 is made of high-strength material to ensure that it is not easily deformed under high pressure. The meshing design of the buffer tooth 6 and the tooth hole 7 further optimizes the dynamic balance of the cylinder, improves the working efficiency and stability of the cylinder, and reduces maintenance costs.

[0033] The piston 3 is penetrated by a buffer rod 9, which is fixed parallel to the side of the piston 3. The buffer rods 9 are evenly distributed around the center of the piston 3's cross-section. The two buffer rods 9 are located at 1 / 4 and 3 / 4 of the diameter of the piston 3's cross-section. The design of the buffer rods 9 effectively disperses the impact force on the piston 3, avoids stress concentration, and improves the durability of the piston 3. The connection between the buffer rods 9 and the piston 3 is made of high-strength alloy material to ensure a firm connection that is not easy to break.

[0034] The outermost part of the buffer rod 9 is the outer cylinder 901, which is a hollow cylindrical structure. A partition 904 is fixedly installed at the center of the outer cylinder 901. One end of the spring 903 is fixedly connected to both sides of the partition 904. The other end of the spring 903 is fixedly connected to one end of the telescopic rod 902. An impact block 905 is fixedly connected to the other end of the telescopic rod 902. The impact block 905 is made of a relatively soft material such as rubber. When the spring 903 is not under force, the length of the spring 903 and the telescopic rod 902 is greater than 1 / 2 the length of the outer cylinder 901. When the piston 3 moves to its limit position, the impact block 905 contacts the inner wall of the outer cylinder 901, and the spring 903 is compressed. The system absorbs impact force, and the telescopic rod 902 deforms with the spring 903. The buffer rod 9 further disperses stress, ensuring smooth cylinder operation and extending service life. The restoring force of the spring 903 causes the impact block 905 to quickly reset, and the telescopic rod 902 returns to its original length. The buffer rod 9 is symmetrical, ensuring that the buffer rod 9 can play a certain buffering role when the piston 3 moves to both ends, ensuring that the piston 3 moves smoothly in the reverse direction. The entire buffer system works in concert, effectively improving the dynamic response performance of the cylinder, reducing wear caused by frequent impacts, further reducing operating noise, and enhancing the overall reliability of the cylinder, enabling it to maintain a highly efficient and stable operating state under various working conditions.

[0035] This invention utilizes the ingenious cooperation between the toothed hole 7 and the buffer tooth 6, and the tight fit between the limiting block 8 and the buffer tooth 6, to ensure that the piston 3 has a certain buffering effect when approaching the cylinder bottom, preventing the piston 3 from directly impacting the cylinder bottom. This makes the piston 3 stable and reliable during movement, while reducing the impact on the cylinder bottom, lowering noise, and extending the cylinder's service life. The buffering effect of the spring 903 inside the buffer rod 9 further optimizes the cylinder's dynamic balance, improving working efficiency and stability, reducing maintenance costs, and ensuring that the cylinder can operate efficiently and stably under various working conditions. Furthermore, the symmetrical design of the buffer rod 9 not only improves the smoothness of the piston 3's movement but also enhances the overall structural strength of the cylinder, allowing it to maintain excellent performance even under high-pressure environments. The multiple protection mechanisms of the buffer system effectively reduce the failure rate and ensure long-term stable operation of the cylinder.

[0036] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0037] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A cylinder with a built-in buffer structure, comprising a cylinder barrel (1), a piston rod (4), a piston (3), and a buffer rod (9), characterized in that, The piston rod (4) is located inside the cylinder (1), and a piston (3) is fixed to the top of the piston rod (4). A buffer rod (9) is installed inside the piston (3). The outer surface of the piston (3) is provided with toothed holes (7), which are located at the upper and lower ends of the piston (3). The inner surface of the cylinder (1) is provided with buffer teeth (6) at the positions corresponding to the toothed holes (7). The end of the buffer teeth (6) is provided with a limiting block (8) near the end of the cylinder (1).

2. A cylinder with a built-in buffer structure according to claim 1, characterized in that, The buffer tooth (6) is composed of multiple sets of teeth connected together.

3. A cylinder with a built-in buffer structure according to claim 1, characterized in that, The cylinder (1) is fitted with an end cap (2) at the top. The piston rod (4) passes through the end cap (2) and extends out of the cylinder (1). The end cap (2) is provided with a sealing device. A piston (3) is fixedly installed at the top of one end of the piston rod (4) that extends into the cylinder (1).

4. A cylinder with a built-in buffer structure according to claim 1, characterized in that, A sealing element (5) is fitted on the outside of the piston (3).

5. A cylinder with a built-in buffer structure according to claim 1, characterized in that, The piston (3) is penetrated by a buffer rod (9), which is fixed parallel to the side of the piston (3) and is evenly distributed around the center of the cross-section of the piston (3).

6. A cylinder with a built-in buffer structure according to claim 1, characterized in that, The outermost part of the buffer rod (9) is the outer cylinder (901). A partition (904) is fixedly installed at the center of the outer cylinder (901). The two sides of the partition (904) are respectively fixedly connected to one end of the spring (903). The other end of the spring (903) is fixedly connected to one end of the telescopic rod (902). The other end of the telescopic rod (902) is fixedly connected to an impact block (905).

7. A cylinder with a built-in buffer structure according to claim 6, characterized in that, The outer cylinder (901) is a hollow cylindrical structure.

8. A cylinder with a built-in buffer structure according to claim 6, characterized in that, When the spring (903) is not under force, the length of the telescopic rod (902) is greater than 1 / 2 of the length of the outer cylinder (901).

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