Air cylinder with reliable structure

Abstract

The utility model belongs to the technical field of air cylinders, and particularly relates to an air cylinder with a reliable structure, which comprises a cylinder body, an end cover is fixedly assembled at the opening end of the cylinder body through a riveting structure, a first assembling groove is arranged on the circumferential surface of the end cover, and two positioning rings are oppositely clamped in the first assembling groove in a sleeved mode. First positioning blocks are fixedly arranged in the first assembling groove in an annular array at equal intervals, first positioning grooves matched with the first positioning blocks are formed in the inner side of the positioning ring, a riveting groove is formed in the opening end of the cylinder body, a riveting part matched with the riveting groove is arranged on the end cover, and a second assembling groove is formed in the riveting groove. According to the precise assembly structure design of the end cover and the cylinder body, the assembly precision of the end cover and the cylinder body is greatly improved, it is guaranteed that the height of the internal structure of an air cylinder is consistent and stable, the precision of the end cover and the cylinder body is improved, and the service life of the end cover and the cylinder body is prolonged. And linearity and stability of piston rod movement are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of cylinders, in particular to a cylinder with a reliable structure. Background Art

[0002] A cylinder is a metal part that guides the piston to move back and forth in a straight line inside the cylinder. Cylinders are widely used in automation, robotics, medical treatment, environmental protection, construction, agriculture and other fields. With the continuous development and improvement of pneumatic technology, the application scope of cylinders in the field of industrial automation is becoming wider and wider, which has promoted the continuous progress and development of industrial automation technology.

[0003] The existing cylinder is mainly composed of the following parts: cylinder body, cylinder head, piston rod and other components. The working principle is to input compressed gas into the cylinder body, and the gas pushes the piston to perform linear reciprocating motion in the cylinder body, thereby converting the pressure energy of the gas into the mechanical energy of the piston rod, which is used to drive external equipment, such as the extension and retraction of robotic arms, and the pushing of materials in automated equipment.

[0004] At present, the cylinder in the existing technology has the following shortcomings: the assembly structure of the end cover and the cylinder body in the existing technology often has many defects, and the traditional assembly method is difficult to achieve high-precision matching, resulting in low assembly accuracy of the end cover and the cylinder body, and unable to ensure the consistency and stability of the internal structure of the cylinder, seriously affecting the coordination and accuracy of the operation of the automated production equipment, greatly increasing the potential for failures, and reducing production efficiency; therefore, a cylinder with reliable structure is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the existing cylinder, a cylinder with reliable structure is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: the utility model is a structurally reliable cylinder, comprising a cylinder body, and a first air hole and a second air hole provided on the cylinder body, the open end of the cylinder body being fixedly assembled with an end cover by a riveting structure, a piston being slidably assembled in the cylinder body, a piston rod being fixedly assembled on one side of the piston, the piston rod passing through the end cover and extending out of the cylinder body, a first assembly groove being provided on the circumferential surface of the end cover, two positioning rings being opposite to each other in the first assembly groove, a first positioning block being fixedly arranged in an annular array at equal distances in the first assembly groove, a first positioning groove being provided on the inner side of the positioning ring to cooperate with the first positioning block, a rivet groove being provided at the open end of the cylinder body, a rivet portion being provided on the end cover to cooperate with the rivet groove, a second assembly groove being provided in the riveted groove, a second positioning block being fixedly arranged in an annular array at equal distances in the second assembly groove, and a second positioning groove being provided on the outer side of the positioning ring to cooperate with the second positioning block.

[0007] Preferably, the positions of the first positioning block and the first positioning groove are staggered with the positions of the second positioning block and the second positioning groove.

[0008] Preferably, a sealing groove is provided in the rivet groove, and a sealing ring is installed in the sealing groove.

[0009] Preferably, the piston is equipped with a split magnetic ring.

[0010] Preferably, the piston is equipped with a piston ring.

[0011] Preferably, a first step buffer pad is mounted on the side of the end cover opposite to the piston, and a second step buffer pad is mounted on the side of the piston away from the open end of the cylinder body.

[0012] Beneficial effects of the utility model:

[0013] The utility model provides a cylinder with reliable structure. Through the precise assembly structure design of the end cover and the cylinder body of the utility model, the assembly accuracy of the end cover and the cylinder body is greatly improved, ensuring that the internal structure of the cylinder is highly consistent and stable, which effectively avoids performance differences and potential faults caused by assembly errors, and significantly improves product quality stability and reliability. During long-term use, the assembly structure can withstand various complex external forces, such as vibration, impact, temperature changes, etc., to prevent gaps or offsets between the end cover and the cylinder body, ensure the linearity and stability of the piston rod movement, and enable the cylinder to always maintain a high-precision working state under complex working conditions. This provides a solid guarantee for the stable operation of automated production equipment, effectively reduces the scrap rate and production accidents caused by equipment accuracy problems, greatly improves production efficiency and product quality, and significantly reduces the company's production costs and operating risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 It is a cross-sectional view of the structure of the utility model as a whole;

[0016] Figure 2 yes Figure 1 A magnified view of the structure at point A;

[0017] Figure 3 It is a cross-sectional view of the positions of the first assembly groove, the positioning ring, and the second assembly groove of the utility model;

[0018] Figure 4 yes Figure 3 A magnified view of the structure at B in the middle;

[0019] Legend:

[0020] 1. Cylinder body; 2. First air hole; 3. Second air hole; 4. End cover; 5. Piston; 6. Piston rod; 7. First assembly groove; 8. Positioning ring; 9. First positioning block; 10. First positioning groove; 11. Riveted groove; 12. Riveted part; 13. Second assembly groove; 14. Second positioning block; 15. Second positioning groove; 16. Sealing groove; 17. Sealing ring; 18. Split magnetic ring; 19. Piston ring; 20. First step buffer; 21. Second step buffer. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Specific examples are given below.

[0023] See also Figures 1-4The utility model describes a cylinder with reliable structure, comprising a cylinder body 1, and a first air hole 2 and a second air hole 3 opened on the cylinder body 1. The open end of the cylinder body 1 is fixedly assembled with an end cover 4 through a riveting structure. A piston 5 is slidably assembled in the cylinder body 1, and a split magnetic ring 18 is assembled on the piston 5. A piston ring 19 is assembled on the piston 5. A piston rod 6 is fixedly assembled on one side of the piston 5. The piston rod 6 passes through the end cover 4 and extends out of the cylinder body 1. A first assembly groove 7 is opened on the circumferential surface of the end cover 4. There are two positioning rings 8 in the first assembly groove 7 in the form of opposing sleeves. A first positioning block 9 is fixedly arranged in an annular array at equal distances in the first assembly groove 7. The inner side of the positioning ring 8 is opened There is a first positioning groove 10 that cooperates with the first positioning block 9, a rivet groove 11 is provided at the open end of the cylinder body 1, and a rivet portion 12 that cooperates with the rivet groove 11 is provided on the end cover 4, a second assembly groove 13 is provided in the rivet groove 11, and second positioning blocks 14 are fixedly arranged in an annular array at equal intervals in the second assembly groove 13, and a second positioning groove 15 that cooperates with the second positioning block 14 is provided on the outer side of the positioning ring 8; during operation, in the assembly link of the end cover 4 and the cylinder body 1, the two positioning rings 8 are first inserted into the first assembly groove 7 of the end cover 4. At this time, the first positioning block 9 and the first positioning groove 10 are interlocked with each other, so that the positioning ring 8 is initially positioned and fixed on the end cover 4 to prevent it from circumferential rotation or displacement.Then align the riveted portion 12 of the end cover 4 with the riveted groove 11 of the cylinder body 1 and insert it. During the insertion process, the second positioning block 14 cooperates with the second positioning groove 15 on the outer side of the positioning ring 8 to accurately position the end cover 4 on the cylinder body 1 in the axial and circumferential directions. Finally, the riveted portion 12 of the end cover 4 is tightly combined with the riveted groove 11 of the cylinder body 1 through the riveting process to complete the fixed assembly of the two. The assembly structure design of the end cover 4 and the cylinder body 1 in the utility model significantly improves the assembly accuracy. Through the coordinated action of the positioning ring 8 and the two sets of positioning blocks and the positioning groove, the assembly accuracy and repeatability between the end cover 4 and the cylinder body 1 are greatly improved, ensuring the high consistency and stability of the internal structure of the cylinder. This high-precision assembly effectively avoids various performance differences and potential faults caused by assembly errors, and significantly improves the quality stability and reliability of the product. More importantly, the assembly structure can effectively prevent the end cover 4 and the cylinder body 1 from having gaps or offsets during long-term use due to the influence of various complex external forces such as vibration, impact, and temperature changes. Once there is a position deviation between the end cover 4 and the cylinder body 1, the movement trajectory of the piston rod 6 will inevitably be offset, which will seriously affect the working accuracy and overall performance of the cylinder. The present assembly structure fundamentally eliminates this situation, ensures the linearity and stability of the movement of the piston rod 6, and ensures that the cylinder can consistently maintain a high-precision working state under various complex working conditions, providing a solid and reliable guarantee for the stable operation of automated production equipment, effectively reducing the scrap rate and production accidents caused by equipment accuracy problems, improving production efficiency and product quality, and reducing the company's production costs and operating risks.

[0024] Furthermore, the positions of the first positioning block 9 and the first positioning groove 10 are staggered with the positions of the second positioning block 14 and the second positioning groove 15; during operation, during the assembly of the end cover 4 and the cylinder body 1 and the subsequent operation of the cylinder, the staggered positioning structure subjects the end cover 4 to multi-directional constraints. When the cylinder is subjected to forces from different directions, such as the impact force generated by air pressure fluctuations, vibrations caused by equipment operation, or external collision forces, these forces will be dispersed and transmitted to various positioning contact parts, significantly improving the reliability and stability of the connection between the end cover 4 and the cylinder body 1, extending the service life of the cylinder, and ensuring the continuous and stable operation of the entire equipment system.

[0025] Furthermore, a sealing groove 16 is opened in the rivet groove 11, and a sealing ring 17 is installed in the sealing groove 16; during operation, during the assembly process of the end cover 4 and the cylinder body 1, when the riveted portion 12 of the end cover 4 fills the riveted groove 11 of the cylinder body 1 by riveting, the riveted portion 12 will gradually enter the sealing groove 16 and apply pressure to the sealing ring 17. The sealing ring 17 is elastically deformed under the action of this pressure, which can not only fit tightly to the inner wall of the sealing groove 16 and the adjacent contact surfaces of the cylinder body 1 and the end cover 4, fill all possible tiny gaps, thereby forming a reliable sealing interface at the connection between the end cover 4 and the cylinder body 1, and the process of the riveted portion 12 entering the riveted groove 11 also enhances the tightness of the connection between the end cover 4 and the cylinder body 1, further improving the fixing firmness of the end cover 4.

[0026] Furthermore, a first step buffer pad 20 is provided on the side of the end cover 4 opposite to the piston 5, and a second step buffer pad 21 is provided on the side of the piston 5 away from the open end of the cylinder body 1; during operation, during the reciprocating motion of the piston 5 in the cylinder body 1, when the piston 5 approaches the end of the stroke, if it moves toward the end cover 4, the piston rod 6 will first contact the first step buffer pad 20, and if it moves away from the end cover 4, the piston 5 will contact the second step buffer pad 21. At the moment of contact, the buffer pad is elastically deformed due to being squeezed. As the piston 5 or the piston rod 6 continues to move, the buffer pad is further compressed, and the kinetic energy of the piston 5 or the piston rod 6 is absorbed by the increase of its own elastic potential energy, thereby gradually slowing down the movement speed of the piston 5 and the piston rod 6 until it stops.

[0027] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A cylinder with a reliable structure, comprising a cylinder body (1), and a first air hole (2) and a second air hole (3) provided on the cylinder body (1), characterized in that: The open end of the cylinder body (1) is fixedly assembled with an end cover (4) through a riveting structure, a piston (5) is slidably assembled in the cylinder body (1), a piston rod (6) is fixedly assembled on one side of the piston (5), the piston rod (6) passes through the end cover (4) and extends out of the cylinder body (1), a first assembly groove (7) is provided on the circumferential surface of the end cover (4), two positioning rings (8) are arranged in the form of opposing sleeves in the first assembly groove (7), and first positioning blocks (9) are fixedly arranged in an annular array at equal intervals in the first assembly groove (7), the positioning A first positioning groove (10) is provided on the inner side of the ring (8) and is matched with the first positioning block (9); a rivet groove (11) is provided on the open end of the cylinder body (1); a rivet portion (12) is provided on the end cover (4) and is matched with the rivet groove (11); a second assembly groove (13) is provided in the rivet groove (11); second positioning blocks (14) are fixedly provided in an annular array at equal intervals in the second assembly groove (13); and a second positioning groove (15) is provided on the outer side of the positioning ring (8) and is matched with the second positioning block (14).

2. A structurally reliable cylinder according to claim 1, characterized in that: The positions of the first positioning block (9) and the first positioning groove (10) are interlaced with the positions of the second positioning block (14) and the second positioning groove (15).

3. A structurally reliable cylinder according to claim 1, characterized in that: A sealing groove (16) is provided in the riveting groove (11), and a sealing ring (17) is installed in the sealing groove (16).

4. A structurally reliable cylinder according to claim 1, characterized in that: The piston (5) is equipped with a split magnetic ring (18).

5. A structurally reliable cylinder according to claim 1, characterized in that: The piston (5) is equipped with a piston ring (19).

6. A structurally reliable cylinder according to claim 1, characterized in that: A first step buffer pad (20) is mounted on the side of the end cover (4) opposite to the piston (5), and a second step buffer pad (21) is mounted on the side of the piston (5) away from the open end of the cylinder body (1).

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